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Mission Statement Our vision is to be the leading global provider of robotic well solutions within the oil and gas industry. To achieve our vision, we deliver superior service with proprietary high-technology equipment. We collaborate closely with oil and gas companies to develop breakthrough technologies that solve challenges quickly, effectively and with certainty - even in extreme operating conditions and technologically challenging wells. Our mission is to deliver these core business benefits with clean technology that advances our clients’ ongoing efforts to enhance personnel safety and health while reducing their environmental risks, fuel consumption and carbon footprints.
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Preface by Jørgen Hallundbæk Allerød, September 2009
President and CEO
Welltec® is a solution-driven company, developing and applying proven technology to address the challenges of tomorrow’s needs. We continue to push the boundaries of conventional oil field technology to their limits and force the only constant parameter we know: change. Only through constant change are we capable of capturing the necessary improvements to assure a strong future for our stakeholders: industry, customers and employees.
We motivate our work force with leadership through example. Our superior level of service quality is underpinned and driven by the highest standards of ethical conduct incorporating all our policies and QHSE values in our everyday activities. Within the delivery of our services, we make a profit to assure a continued source of funding for our ongoing research and development. By developing knowledge and competence based skills and taking initiatives that add value to our industry, we have assured our current position as the market leader in our field.
of oilfield applications. During this process, we deliver to our customers what they want, not what we think they need. Due to our culture of creative thinking and our determination to move beyond the conventional, we are certain we will achieve our goals. We are confident as to the future when measuring our success in relation to customer satisfaction, including the durability of our existing customer relationships and the recent rate of exponential growth sustained by our company. We have built our company to last and look forward to the challenges of tomorrow.
We draw strength from our in-depth engineering and manufac turing knowledge, combining it with a detailed understanding
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Contents
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p. 6 – 7
Welltec® at a Glance
p. 8 – 9
The Well Tractor® Story
p. 24 – 25
Product Line Gathering Logging Data While Driving Forward
p. 26 – 27
Well Tractor® Services
p. 28 – 29
Run in Hole Procedures Type of Jobs
p. 10 – 11
The Well Tractor®
p. 12 – 13
Company History
p. 14 – 15
Technological Leadership
p. 30 – 31
Why Use a Wireline Well Tractor®?
p. 16 – 17
Awards
p. 32 – 33
The Wireline Well Tractor®
p. 18 – 19
QHSE
p. 34 – 35
Wireline Well Tractor® – Performance
p. 20 – 21
Welltec’s Team The Welltec® Employees
p. 36 – 39
p. 22 – 23
Pre-job Planning
p. 40 – 41
Specifications – Well Tractor® 218 Specifications – Well Tractor® 318 Specifications – Well Tractor® 412 Why Use a Coiled Tubing Well Tractor®?
p. 42 – 43
The Coiled Tubing Well Tractor®
p. 44 – 45
Coiled Tubing Well Tractor® – Performance
p. 62 – 63
The Well Cleaner®
p. 46 – 47
Run in Hole Procedures Type of Jobs
p. 64 – 65 p. 66 – 67
Recent Developments Specifications – Well Cleaner®
p. 48 – 49
Pressure Drop Specifications – Coiled Tubing Well Tractor® Mechanical Downhole Services
p. 68 – 69
Why Use a Well Miller®?
p. 70 – 71 p. 72 – 73
The Well Miller® The Well Miller® NPR
p. 74 – 75
The Well Miller® RCB Specifications – Well Miller®
p. 76 – 77
Welltec Release Device® Specifications – Welltec Release Device®
p. 78 – 81
Worldwide Contacts
p. 50 – 51
p. 52 – 53 p. 54 – 55 p. 56 – 57
p. 58 – 59 p. 60 – 61
Why Use a Well Stroker®? The Well Stroker® Why Use a Well Key®? The Well Stroker® with the Well Key®
Specifications – Well Stroker® Specifications – Well Key® Why Use a Well Cleaner®?
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Welltec® at a Glance We thrive on innovative ideas and we are dedicated to move beyond the conventional
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The backbone of Welltec’s progressive growth has been the design, manufacturing and development of the patented Well Tractor® - a downhole well bore intervention tool used for transporting diagnostic and maintenance equipment inside highly deviated and horizontal oil and gas wells. Through years of experience, gained since the initial commercial introduction in 1996, Welltec® has identified the need for clean, unique solutions to address the ongoing challenges of tomorrow’s intervention market. Innovative thinking combined with professionalism and a strong focus on quality has established Welltec® as a world leader in the development of cost-effective and value-creating solutions for vertical, horizontal and deviated wells. Today, Welltec® is regarded as the leading provider of robotic solutions worldwide, and we have amassed an impressive operating track record to clearly identify ourselves as the market leader.
Our only constant is change Changing situations require innovative responses
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The Well Tractor® Story In 1987, the first ideas for a conveyance device
for horizontal well intervention were conceived
These original ideas led to the foundation of Welltec® in 1994. Throughout March 1996, the first commercial Well Tractor® field trials were carried out successfully in Norway. From there on, the Well Tractor® technology has changed the way operators plan and drill their wells. Our technology facilitated a step change in the technique of deploying logging tools into horizontal and highly deviated wells without the use of drill pipe or coiled tubing.
Lately, our areas of expertise have expanded from conveyance to also include well optimization. For instance, we have developed a series of mechanical services to supplement our tractor services, and this series will expand to include new tools. We will continue to revolutionize the well intervention technology to meet the demands of our clients and secure that we are constantly in a league of our own.
From the very beginning, Welltec® has focused on keeping the time frame from development and design of an idea to the final commercial application as short as possible, while still meeting the requirements of the Welltec® QHSE Management System. Welltec® has therefore established its own R&D, manufacturing, assembly, testing and control facilities.
Welltec® currently has +450 employees who support the operational activities. Support bases are located in Angola, Azerbaijan, Australia, Brazil, Canada, the Congo, Denmark, India, Indonesia, Malaysia, Mexico, Nigeria, Norway, Russia, Saudi Arabia, U.A.E., U.K., U.S., Venezuela and Vietnam. With the rapidly increasing demand for Welltec® services, we will expand our activities with new bases in the future.
At the well site, Welltec® carries out Well Tractor® operations with specialized field engineers. Each tool is preconfigured in advance by our team of experienced engineers to suit the necessary application and other company interfaces, as required.
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Welltec’s technology has revolutionized the oil and gas industry
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The Well Tractor® Our Well Tractor® offers a deployment solution for all traditional wireline conveyed operations, including ballistic/perforating services, production logging, cased and open hole logging and drill pipe recovery. The Well Tractor® can also be run on coiled tubing to extend the reach of coiled tubing in extended reach oil and gas wells.
Wireline Well Tractor ®
Coiled Tubing Well Tractor ®
Mechanical Downhole Services
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Services run on the wireline Well Tractor®: Perforating, cement bond logging, production logging, plug setting and pulling, backoff in drill pipe, gyro, caliper, tubing puncher, bailer runs, gas lift mandrel runs, shifting sliding sleeves, opening and closing isolation valves, seismic operations, camera, open hole logging, magnetic ranging services in SAGD wells, milling isolation valves, scale milling, fishing, cleaning completions, pipeline inspection and other services done on a wireline cable. Services run on the Coiled Tubing Well Tractor®: Perforating long intervals, setting straddles, “stiff wire” logging services, well bore cleanouts, acidization, milling, fishing operations, plug pulling, shifting sliding sleeves and other services done on coiled tubing. Setting and retrieving plugs, setting and retrieving gas lift mandrels, opening/closing sliding sleeves, opening/closing isolation valves, fishing, removal of scale and sand bridges, cleaning sub surface safety valves, sand clean out, milling of Barium Sulfate bridges, milling of downhole isolation barriers, cement plug drilling, cast iron plug milling, establishing flow paths, nipple profile milling and much more.
D e v e l o p m e n t o f I n t e r v e n t i o n S t r a t e g y, StatoilHydro (xStatoil), 1992 – 2008, Activity As Well Tractor® technology replaces conventional services, it adds value to the management of well services, which is reflected in the overall use of Well Tractor® interventions. Snubbing/RAS
Coiled Tubing
WL Tractor
RLWI
O p e r a t i o n s p e r Ye a r
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140 120 100 80 60 40 20 0
1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008
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Company History 1994
1999
Welltec and the Welltec Denmark office, production and service facilities were established ®
1997 Office and service facility established in Aberdeen, UK
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2001
Office and service facility established in Bergen, Norway
2000 Office and service facility established in Houston, Texas, USA
2003
Office and service facility established in Calgary, Alberta, Canada
2002 Office and service facility established in Singapore & Kuala Lumpur, Asia Pacific
Office and service facility established in Anchorage, Alaska & Midland, Texas, USA
2004 New Headquarters established in Denmark, that include: R&D, Manufacturing, Servicing, Operations HQ and Training facilities. Office and service facilities established in Fort Worth , Texas, USA.
2005
2007
2009
Office and service facility established in Bonnyville, Canada - Maturín, Venezuela Abu Dhabi, United Arab Emirates Haugesund, Norway - Perth, Australia Macaé, Brazil and Luanda, Angola
Office and service facility established in Stavanger, Norway - Denver, Colorado, USA Farmington, New Mexico, USA - Conway, Arkansas, USA - Villahermosa, Mexico - Río de Janeiro, Brazil - Port Harcourt, Nigeria
Office and service facility established in Minot, North Dakota, USA - Balikpapan, Indonesia
2006 Office and service facility established in Prudhoe Bay & New Orleans, USA - Lagos, Nigeria Labuan, Malaysia - Jakarta, Indonesia Moscow, Russia and Baku, Azerbaijan
2008 Office and service facilities established in Pointe-Noire, Congo - Kakinada, India Mumbai, India - Vung Tau, Vietnam and Al-Khobar, Saudi Arabia
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Technological Leadership 1987 First plans for the Well Tractor on the drawing board
®
1994 First field trial with the Well Tractor®
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1996
2000
2002
The first wireline and Coiled Tubing Well Tractors are introduced to the market
The 318 Well Tractor XR is introduced
New associated technology is introduced: The Well Stroker®
®
1998 A miniaturized Well Tractor®, the 218 Well Tractor®, is introduced
2001 The 218 Well Tractor® XR is introduced
2003
2004
2006
New technology is introduced: The Well Cleaner® LE, Well Key® & Well Brush*
New technology is introduced: The Well Miller® joins the Welltec® fleet. The 218 Coiled Tubing Well Tractor® XR is introduced
The 218 Well Stroker , 312 Well Cleaner® DE, 218 Well Key® and 212 Well Miller® are introduced
2003 The 218 Well Tractor® XR DC Motor, which acquires downwards logging data while driving forwards in open hole, is introduced *
2005 The Welltec Release Device® is introduced
2008 ®
2007 The Well Miller® RCB and 218 Well Cleaner® LE are introduced
The 212 Coiled Tubing Well Tractor® is introduced
2009 The Well Cleaner® PST, 412 Well Tractor® and Well Miller® NPR are introduced
The Well Brush is now a part of the Well Cleaner®
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Awards 1996
1998
2002
We are awarded Petroleum Technology Transfer Council Award
We win Woelfel Best Mechanical Engineering Innovation Award for the Well Tractor®
We proudly receive King Frederik 9th Award for Excellence in Export
Jørgen Hallundbæk and his wife receive
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1999
1999
We win Special Meritorious Award for Engineering Innovation
We receive Gazelle of the Year
the King Frederik 9th Award for Excellence in Export, presented by His Royal Highness, Prince Henrik of Denmark.
2003
2006
2008
We are awarded Woelfel Best Mechanical Engineering Innovation Award for the Well Stroker®
We win Entrepreneur of the Year
We were awarded the ONS Innovation Award and OTC Spotlight on New Technology Award for the Well Miller® RCB
2005
2007
2009
We receive World Petroleum Council Meritorious Award for Technical Excellence
We win Woelfel Best Mechanical Engineering Innovation Award for the Well Miller®
We achieve the OTC Spotlight on New Technology Award for the Well Cleaner® PST
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QHSE We l l t e c ’s Q H S E M a n a g e m e n t S y s t e m meets the demand for modern quality by setting the standards for achieving t h e h i g h e s t l e v e l o f q u a l i t y, h e a l t h , safety and environmental management
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Quality
Health
Our ambition is to exceed the expectations of our clients by offering and delivering the highest level of service quality
Welltec® strives to take care of the health of every individual who is involved in our activities
Safety
The preservation and safety of all personnel and equipment involved in our operations is the primary concern of all Welltec® employees
Environment
Welltec® endeavours to limit adverse effects on the physical environment where all our activities are carried out while considering employees and others who may be affected by our activities. Our manufacturing facilities recycle 90%.
ISO 9001 Quality Management System Standard Award DS/EN ISO 9001:2000 achieved in 2003
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Welltec’s Team Co-operation, trust and respect are our strengths
Our people come up with ideas and turn them into reality Our employees are enterprising and they know how to motivate each other, enabling us to work as a team in a world characterized by daily changes and new challenges. Welltec® provides the framework for the individual employee to develop his or her personal and professional skills, guaranteeing job satisfaction, competence and inspiration.
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Our employees cope with their demanding work by participating in creating an attractive workplace, based on their individual needs. Without our employees’ skills, creative input and responsibility, Welltec® would not have been able to develop into the solid, competitive, international company we are today.
The Welltec® Employees Our employees are regarded as our greatest asset
The Welltec® employee
• Thinks – informs – reacts – measures
• Supports and develops the internal and external supplier/customer relationships
• Applies the highest level of consistent quality within every process
• Sets ambitious goals and achieves them
• Learns, respects and exchanges knowledge with other employees
• Knows that quality and professionalism are fundamental to every action
• Is open to change and acts as a catalyst to facilitate change
• Strives for the success of others within the organization
• Adds value within the process of change
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Pre-job Planning Based on years of experience, we utilize our own
WellSimTM is a program developed especially for analyzing and planning Well Tractor® operations. It is an essential tool when confirming the technical feasibility of the operation. WellSimTM predicts at what depth the Well Tractor® needs to be started and what pull is required to get to any given depth in a well. The pick-up weight is calculated along with a recommended weak point. The directional properties of the well, inclination, azimuth and dog legs, are taken into account along with restrictions and casing/hole conditions, friction, when calculating the toolstring and cable drag.
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proprietary drag analysis program – WellSim™ Well profile
Simulation results
Well Tractor®
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Product Line W e l l Tr a c t o r ® • C T W e l l Tr a c t o r ® • W e l l C l e a n e r ® • W e l l Stroker® • Well Key® • Well Miller® • Welltec Release Device®
• Cased and open hole wireline Well Tractor® • Cased and open hole Coiled Tubing Well Tractor® • Mechanical downhole services
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Gathering Logging Data While Driving Forwards We deliver what our clients want
– not what we think they need
Gathering data while driving forwards with a downhole conveyance device has always been a desire among petroleum engineers. In our efforts for continual improvement, we have gained the ability to gather logging data on the downwards production logging pass, and we have implemented this concept with the launch of the DC powered wireline Well Tractor®.
Welltec® has also refined the ability to transfer mud pulse telemetry through subsurface drilling assemblies when using the Coiled Tubing Well Tractor® as a constant weight on bit mechanism. We continue to push the boundaries of technology forward to add value to our customers’ activities.
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Well Tractor® Services The development of deviated and horizontal wells has been limited by the available intervention methods. Drill pipe, snubbing and coiled tubing have been the traditional methods of intervention, but based upon the large quantities of equipment needed to facilitate these types of operations, they are sometimes cancelled before they start. Extending the reach of the traditional wireline is one of the most cost-saving and value-creating technologies in the well intervention industry applied in the last decade. This has enabled operators to carry out cost-efficient interventions, which have reduced AFE* costs and enabled an increase in oil and gas production. *
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AFE - “Authority For Expenditure”
The original and revolutionary Well Tractor® technology has been developed and perfected by Welltec®. This technology has become the backbone of our company’s rapid rate of success and expansion. It is designed to complement the applications of both wireline and coiled tubing interventions. The rapid rate of utilization of our technology across the globe is a clear indicator of its ability to reduce costs and enhance safety within the operations. The Coiled Tubing Well Tractor® enables a smaller diameter of coiled tubing to be drawn further out into the well bore, beyond the point where coiled tubing buckles and stops. The introduction of composite coiled tubing technology, in conjunction with the Coiled Tubing Well Tractor®, opens up a whole new intervention technique. By combining the two, greater well depths can be achieved.
Wireline Well Tractor® The wireline Well Tractor® is designed to convey any conventional wireline toolstring used in the well bore, while pulling the wire-line behind it. The cable and tool friction are therefore compensated and allow the wireline string to be driven forward.
Coiled Tubing Well Tractor® The Coiled Tubing Well Tractor® is driven by the fluid pumped down through the coil. This powers the Coiled Tubing Well Tractor®, which pulls the coil downhole and pushes the toolstring ahead of it. The buckling effect will be reduced due to the pull at the end of the coil, resulting in extending the reach of the coiled tubing or the option to use a smaller coiled tubing.
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Run in Hole Procedures
After the Well Tractor® has been rigged up over the well at the end of the electric wireline, it descends into the hole in a controlled manner. Due to gravity, it falls freely under the control of the wireline until the deviation of the well reaches a point where friction on the toolstring and cable prevents the string from progressing further.
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The Well Tractor® is activated and the wheels come out of the tool body. The action of initiating the tool centralizes it in the well bore. Once the wheels establish contact with the casing, the Well Tractor® starts to move forward and deploys the logging tools into the horizontal well bore, taking the string beyond the original hang up point.
Once the toolstring reaches its objective depth, the Well Tractor® is powered down. It now resembles a passive sinker bar included within the toolstring so the wireline toolstring can be pulled out of the well bore.
Type of Jobs What can be run on electric wireline in a vertical well can be conveyed in a horizontal well with the Well Tractor®
Ballistics •
Perforating
•
Drill pipe back off/stringshots
•
Drill pipe severing
•
Setting ballistic plugs
•
Pipe cutters
•
Selective Perforating Switches – a new, more reliable product
Drilling/Reservoir Evaluation •
Logging in cased and open hole
•
Opening and closing isolation valves
•
Milling isolation valves
•
Drill pipe free point/back off
•
Chemical and explosive cutters
•
Tubing punch operations
•
Cement bond logging
•
Gyro and cement bond log combinations
•
Fishing
•
Magnetic ranging tool conveyance for SAGD heavy oil applications
•
Radioactive source retrieval prior to carrying out “back off” operations
•
Seismic applications
Production Evaluation and Workover •
Logging in cased and open hole
•
Plug setting/pulling non-ballistic
•
Shifting sliding sleeves
•
Cleaning completions
•
Scale milling
•
Sand removal - bailing
•
Slim hole logging
•
Fishing
•
Setting plugs
•
Pipeline inspection/remediation
•
Nipple profile milling
•
Milling plugs of all types
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Why Use a Wireline Well Tractor®? Introduction of intelligent wells
The wireline Well Tractor® allows logging tools to reach the end of the drilled horizontal or highly deviated well. It achieves this without the need for drill pipe or coiled tubing conveyance methods. It is a tethered, wireline deployed conveyance device, which pushes wireline toolstrings out to the end of the well bore. With the introduction of intelligent wells onto the market, the need for developing a contingency intervention plan has increased. The Well Tractor® technology is ideally suited to cover this new market with the advent of Welltec’s mechanical services. Prior to the introduction of the Well Tractor®, methods like drill pipe and coiled tubing were deemed the only feasible ways to access horizontal and highly deviated well bores. These methods require the mobilization of large quantities of heavy equipment and, subsequently, large numbers of personnel. This has a knock-on effect of increased operational risks along with increased time required to rig up and down the respective heavy equipment.
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Reduction of operational hazards and risks
The introduction of the revolutionary Well Tractor® has catalyzed a radical increase in the application of wireline interventions in horizontal wells. This increase in wireline interventions has been a major influencing factor in the reduction of costs for intervention programs and also a major contributing factor in the reduction of operational hazards and risks. Furthermore, the safety of both people and equipment is enhanced when applying Well Tractor® technology. The wireline Well Tractor® also embraces and perpetuates the mitigation of risks associated with environmental impact. It has proven itself to be a key change agent in the quest towards establishing zero emissions and discharges. The key reason for the increased utilization of Well Tractor® technology has been the demonstration of a clear reduction in operating costs for the oil companies. These cost savings have been achieved due to increases in operational efficiency and well optimizations.
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The Wireline Well Tractor® The electric wireline Well Tractor® is currently available in three sizes: 2 1/8, 3 1/8 and 4 1/2 inch outside diameter. They are optimized for pulling force and speed in conjunction with the downhole completion string. To provide good communication with the winch driver, the surface control panels are normally positioned inside the wireline unit. They power and control the progress of the Well Tractor® when it is inside the well. Diagnostic data is also relayed back to the surface. The Well Tractor® functions with an electric over hydraulic power relationship. The control, communications and power are electric, while the remaining parts and functions are hydraulic, allowing the use of a modular structure for the drive sections. This makes it possible to change the Well Tractor’s traction by reducing or increasing the number of wheels needed to drive the Well Tractor®, without affecting the efficiency. The wheels are grouped into sections of
four wheels per section. To increase the pull force of the Well Tractor®, it is possible to add extra drive sections. As a result of changing the number of drive sections, speed can also be adjusted. The wheels in each section are in line and pumped out with 180 degree phasing, incorporating two wheels on each side of the section. To ensure 360 degree wheel coverage inside the well bore or open hole, each drive section is subsequently phased 90 degrees to the previous drive section when assembled. When the Well Tractor® is initially powered up, the wheels in each drive section are hydraulically deployed out of the tool body. The wheels start to rotate automatically once they emerge from the body of the Well Tractor®. Each wheel contains its own independent hydraulic motor, which facilitates the rotation of the wheels and the forward motion of the Well Tractor®.
Fail-Safe Features The passive and immediate fail-safe features prevent the Well Tractor® from getting stuck in the well bore with the arms and wheels extended. The arms and wheels will retract automatically when the tool is powered down or disconnected, providing a flush outside diameter tool.
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Top connector Connects to the wireline through mono or multi cable heads
Wheel sections Wheel sections can be optimized to maximize speed or force
Bottom connector Connects to mono or multi line logging tools below the Well Tractor®
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Wireline Well Tractor® P e r f o r m a n c e
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The electrically driven Well Tractor ® can be configured for speed and power. It is powerful enough to push large open hole toolstrings into the open hole, and it is robust enough to withstand the shocks of perforating.
With more than 13 years of experience, we can provide solutions for any operational and environmental challenge We are only limited by our imagination
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Specifications
2 1 8 We l l Tr a c t o r ®
Well Tractor ®
218 Standard
218 XR *
218 OH *
Body tool OD
2 1/8”
2 1/8”
2 1/8”
Length
16 ft
17.5 ft
17.5 ft**
Weight in air
175 lbs**
175 lbs**
175 lbs**
Completion ID, Small restrictions configuration
2.2” to 6.2”
2.2” to 8.4”
2.2” to 8.4”
Completion ID, Max. reach configuration
2.7” to 6.6”
2.8” to 9.2”
2.8” to 9.2”
Max. well pressure
25 kpsi
25 kpsi
25 kpsi
Max. temperature
400º F
400º F
400º F
*
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**
**
Force vs. Speed, Standard configuration
600 lbs, 2,400 ft/hr
800 lbs, 2,400 ft/hr
800 lbs, 2,400 ft/hr
Force vs. Speed, Optimized force configuration
800 lbs, 1,200 ft/hr
1,000 lbs, 1,200 ft/hr
1,000 lbs, 1,200 ft/hr
Force vs. Speed, Optimized speed configuration
400 lbs, 3,600 ft/hr
600 lbs, 4,000 ft/hr
600 lbs, 4,000ft/hr
Dog leg
32º/100 ft @ 4.00” ID
32º/100 ft @ 4.00” ID
32º/100 ft @ 4.00” ID
Tensile strength
24,000 lbs
36,000 lbs
36,000 lbs
Compressive strength
30,000 lbs
30,000 lbs
30,000 lbs
Wireline configuration
Mono, multi
Mono, multi
Mono, multi
XR: Extended Reach, OH: Open Hole
**
Depending on configuration Specifications are subject to change without notice
Specifications
3 1 8 We l l Tr a c t o r ®
Well Tractor ®
318 Standard
318 XR *
318 OH *
Body tool OD
3 1/8”
3 1/8”
3 1/8”
Length
18 ft
19 ft
19 ft**
Weight in air
365 lbs**
409 lbs**
409 lbs**
Completion ID, Small restrictions configuration
3.4” to 7.4”
3.4” to 9.6”
3.4” to 9.6”
Completion ID, Max. reach configuration
5.2” to 8.8”
4.2” to 12.6”
4.2” to 12.6”
Max. well pressure
25 kpsi
25 kpsi
25 kpsi
Max. temperature
400º F
400º F
400º F
*
**
**
Force vs. Speed, Standard configuration
1,200 lbs, 2,400 ft/hr
1,400 lbs, 2,400 ft/hr
1,400 lbs, 2,400 ft/hr
Force vs. Speed, Optimized force configuration
1,800 lbs, 1,200 ft/hr
2,400 lbs, 1,200 ft/hr
2,400 lbs, 1,200 ft/hr
Force vs. Speed, Optimized speed configuration
600 lbs, 3,600 ft/hr
800 lbs, 5,000 ft/hr
600 lbs, 5,000ft/hr
Dog leg
32º/100 ft @ 4.00” ID
32º/100 ft @ 4.00” ID
32º/100 ft @ 4.00” ID
Tensile strength
38,000 lbs
42,000 lbs
42,000 lbs
Compressive strength
50,000 lbs
50,000 lbs
50,000 lbs
Wireline configuration
Mono, multi
Mono, multi
Mono, multi
XR: Extended Reach, OH: Open Hole
**
Depending on configuration Specifications are subject to change without notice
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Specifications
4 1 2 We l l Tr a c t o r ®
Well Tractor ®
412
Body tool OD
4.5”
Length
18 ft*
Weight in air
440 lbs*
Completion ID, Small restrictions configuration
4.55” to 17.9”
Completion ID, Max. reach configuration
5.85” to 22”
Max. well pressure
25 kpsi
Max. temperature
400º F
Force vs. Speed, Standard configuration (3 wheel sections)
1,700 lbs, 4,000 ft/hr
Force vs. Speed, Optimized force configuration (4 wheel sections)
2,200 lbs, 3,000 ft/hr
Force vs. Speed, Optimized speed configuration (2 wheel sections)
1,200 lbs, 5,500 ft/hr
Dog leg
32°/100ft @ 5.00” ID
Tensile strength
42,000 lbs
Compressive strength
50,000 lbs
Wireline configuration
Mono, multi
Depending on configuration Specifications are subject to change without notice
*
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T h e 4 1 2 W e l l Tr a c t o r ® w a s i n t r o d u c e d i n 2 0 0 9 a s a r e s p o n s e to client demands for a larger version of the tool.
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Why Use a Coiled Tubing Well Tractor®? Do you need extra pull force for your coiled tubing interventions in
In tortuous or extended reach wells, coiled tubing can buckle and the progress inside the well bore is halted. As a result, the forward motion of the coiled tubing stops while running in the hole. This is based on excessive amounts of friction. The relationship between the outside diameter of the coil and the internal diameter of the casing can also result in buckling of the coiled tubing. These common effects in extended reach wells limit the lateral reach capability of the coiled tubing and prevent the coil from reaching the toe of the well. The fluid driven Coiled Tubing (CT) Well Tractor® extends the lateral reach capability of coiled tubing in horizontal and deviated wells. The CT Well Tractor® pulls the coiled tubing into the well bore, overcoming the tendency of the coil to buckle and lock up. This allows
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for the utilization of smaller diameter coil with less wall thickness or composite coiled tubing, thereby reducing the reel weight and removing the problems associated with crane lifting limitations. The use of the CT Well Tractor® also removes the need for “stiffening” the coiled tubing with pipe stiffeners. As a result, the life span of the coiled tubing is increased. Economic savings can be derived by using smaller quantities of chemical friction reducers when using the CT Well Tractor®. For electrical operations on coiled tubing, it is possible to configure the CT Well Tractor® with a mono feed through, enabling real time logging, electrical setting of plugs, straddles and electrically detonated perforation carriers to be deployed on coil.
extended reach wells or pipelines?
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The Coiled Tubing Well Tractor®
The Coiled Tubing Well Tractor® is currently available in three sizes - 2 1/2 inch, 2 1/8 inch and 3 1/8 inch outside diameter. They are optimized for pulling force, speed, flow rate and pressure loss in conjunction with the completion string. The fluid pumped down through the coiled tubing powers the CT Well Tractor®. A turbine powered by the fluid drives the hydraulic system and moves the tool forward. The CT Well Tractor® functions with a hydraulic over hydraulic power relationship. The controls and power source are completely hydraulic, allowing the use of a modular structure for the drive sections. This makes it possible to change the CT Well Tractor’s traction by reducing or increasing the number of wheels needed to drive the tool, without affecting the efficiency. The wheels are grouped into sections of four wheels per section. To increase the pull force of the CT Well Tractor®, it is possible to add extra drive sections. Changing the number of drive sections allows for adjustment in speed.
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The wheels in each section are in line and pumped out with 180 degree phasing, incorporating two wheels in each direction. To ensure 360 degree wheel coverage inside the well bore or open hole, each drive section is subsequently phased 90 degrees to the previous drive section when assembled. When the CT Well Tractor® is initially powered up, the wheels in each drive section are hydraulically deployed out of the tool body. The wheels start to rotate automatically once they emerge from the body. Each wheel contains its own independent hydraulic motor, which facilitates the rotation of the wheels and the forward motion of the CT Well Tractor®.
Fail-Safe Features The passive and immediate fail-safe features prevent the CT Well Tractor® from getting stuck in the well bore with the arms and wheels extended. The arms and wheels will retract automatically when the tool is powered down or disconnected, providing a flush outside diameter tool.
Top connector Connects to the coiled tubing. It is possible to configure this with an electrical feed through
Turbine Fluid pumped through the coiled tubing powers the turbine that powers the CT Well Tractor®
Wheel sections Wheel sections can be optimized to maximize speed or force
Bottom connector Connects to tools below. Can be configured with a flow outlet or other applications
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Coiled Tubing Well Tractor® P e r f o r m a n c e
The maximum pull achieved with the 318 Coiled Tubing Well Tractor® is 3,500 lbs, which doubles up to 7,000 lbs in tandem configuration. It is also possible to achieve up to 10,000 lbs pulling force when stacking up three Coiled Tubing Well Tractors for extreme environments. By adjusting the fluid turbine system, the same pulling forces can be achieved when pumping fluid at low pump rates. To increase the ability of the coiled tubing to travel further within the well bore, nitrogen can be used to create a neutrally buoyant state. A foam type mixture can be used for adjusting the density. By creating a neutrally buoyant state, the resistance to the CT Well Tractor® pulling the coil is reduced and the travel distance is subsequently increased. Experience has demonstrated that different mixtures have no influence on the pulling force.
Features of Coiled Tubing Technology • Ability to gather real time, downwards logging data on surface at the same time as driving inside the well bore. This can be achieved through mud telemetry or by deploying the CT Well Tractor® in “stiff wire” intelligent mode • Ability to double or triple the downhole power applied with the introduction of the tandem configuration CT Well Tractor® designed to access extreme extended reach well bores, along with extended wash outs in the open hole well bore
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• Ability to reverse and drive backwards out of the hole depending on the well and operational profile
• Compatibility with wireless casing collar locator technology • Acid stimulation
• Ability to drive in open hole as well as in cased hole • Proven and verified with ballistic systems i.e. pressure pulse detonation systems
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Run in Hole Procedures After the Coiled Tubing Well Tractor® has been rigged up over the well at the end of the coiled tubing, it descends into the hole in a controlled manner. The injector head controls the descent of the CT Well Tractor® inside the well bore. The injector head also assists in pushing the toolstring into the well bore to a certain extent. However, the effects of friction and buckling can prevent the string from reaching the toe of some extended reach wells. Once the toolstring can go no further, when feeding the coil with the injector head, tension is applied to the coil and the coil string is raised up the well. The CT Well Tractor® is activated by pumping fluid or nitrogen inside the coil. As a result, wheels come out of the tool body. The action of initiating the CT Well Tractor® centralizes it in the well bore. Once the wheels establish contact to the casing or open hole, the tool starts to move forward and pulls the coiled tubing further into the horizontal well bore, taking the string beyond the original hang up point. When the toolstring reaches its objective depth, the CT Well Tractor® is powered down. It now resembles a passive sinker bar included within the toolstring so the proposed coiled tubing operation can be completed and the string can be pulled out of the well bore.
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Type of Jobs The CT Well Tractor® works with different types of drive fluids, including drilling muds i.e. water, brine, acidizing fluids, pure nitrogen, comingled nitrogen/water or drilling mud.
With many years of experience, we can perform almost any service on coiled tubing including: • Clean-outs
• Plug pulling
• Fishing operations and other mechanical downhole activities
• Bleach cleaning & acidization
• Stimulation and fracture activity
• Perforating
• Shifting sliding sleeves
• Side track drilling with coiled tubing - acting as a constant weight on bit
• Cement bond logging and other cased hole logging
• Milling operations
• Hydrate/paraffin plug removal
Tandem configurations can access extreme extended reach well bores along with extended washouts in open hole, enabling operators to reach the toe of the well
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Pressure Drop
1000 900
Pressure Drop Water (psi)
800 700 600 500 400 300 200 100 0
0
0,5
1
1,5 Flow Rate (bbl/min)
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2
2,5
3
The pressure drop is configuration dependent. Changes to the configuration of wheel sections and operational flow rates will result in changes to the pressure drop across the CT Well Tractor®. Communication with tools beneath the CT Well Tractor® utilizing pressure pulses has proven to be reliable, despite the pressure drop across the CT Well Tractor®. This means that the CT Well Tractor® is fully compatible with logging tools, orientation tools and perforation devices that are initiated by the application of pressure pulse sequences.
Specifications
C o i l e d Tu b i n g We l l Tr a c t o r ®
CT Well Tractor ®
218 TV *
212 TF *
318 TF *
318 TV *
Body tool OD
2 1/8”
2 1/2”
3 1/8”
3 1/8”
Length
18 ft
14.5 ft
17 ft
17 ft**
Weight in air
150 lbs**
370 lbs**
400 lbs**
400 lbs**
Completion ID,
2.2” to 8.4”
2.6” - 9.2”
3.4” to 7.4”
3.4” to 9.6”
2.8” to 9.2”
3.4” - 10.1”
5.2” to 8.8”
3.7” to 12.6”
Max. well pressure
25 kpsi
25 kpsi
25 kpsi
25 kpsi
Max. temperature
400º F
400° F
400º F
400º F
Max. speed
2,700 ft/hr**
4,200 ft/hr**
3,600 ft/hr**
3,600 ft/hr**
Traction force
1,700 lbs @ 0.8 bbl/min**
3,000/6,000***lbs @ 0.8 bbl/min**
3,500/7,000*** lbs @ 1.4 bbl/min**
3,500 lbs @ 1.4 bbl/min**
Max. flow rate
2.0 bbl/min
1,7 bbl/min
3.0 bbl/min
3.0 bbl/min
Flow rate, configured
0.4 - 1.4 bbl/min
0.7 – 1.5 bbl/min
0.6 - 3.0 bbl/min
0.6 - 3.0 bbl/min
Dog leg
32º/100 ft @ 4.00” ID
32º/100 ft @ 4.00” ID
32º/100 ft @ 4.00” ID
32º/100 ft @ 4.00” ID
Tensile strength
38,000 lbs
37,000 lbs
42,000 lbs
42,000 lbs
Compressive strength
50,000 lbs
41,000 lbs
50,000 lbs
50,000 lbs
**
**
**
Small restrictions configuration
Completion ID, Max. reach configuration
TV: Top Vented, TF: Through Flow
*
**
Depending on configuration
Tandem configuration Specifications are subject to change without notice
***
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Mechanical Downhole Services Electric wireline tractor technology has expanded well beyond the initial scope of conveying logging tools into horizontal cased wells. Redefining the current use of electric wireline is seen as one of the more exciting areas to develop. At Welltec®, we are focusing on applying this technology and we are viewed by the industry as ground-breaking in the application of new technology. Our mechanical intervention services allow operators to perform the following electric wireline operations:
• Opening and closing zonal isolation valves • Manipulating sliding door valves • Setting straddle packers for water shut-offs • Setting and retrieving gas lift valves • Setting and retrieving mechanical plugs • Fishing electric line and slick line tools • Removing scale bridges • Removing debris fill • Removing sand bridges • Cleaning nipple seats prior to setting straddle packers • Cleaning sub surface safety valves
Well Stroker ® Designed to apply a focused force downhole, the Well Stroker® anchors itself against the tubing and applies a bi-directional force on the end of the electric wireline. This makes it possible to apply up to 16 tons of force, strategically located on the end of the electric wireline in the horizontal well bore. The benefits of providing the Well Stroker® is that it can provide high pushing and pulling forces down-hole where and when required in order to easily set and pull plugs, shifts sleeves and valves.
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• Cement plug drilling • Removing Inconel and Superchrome isolation valves • Scale milling • Removing barium sulfate bridges in dry gas wells • Establishing flow paths through flapper and ball valves • Removing downhole barriers • Cast iron bridge plug milling • Composite bridge plug milling • Nipple profile milling • Removing downhole debris barriers
Well Key ® The Well Key® is operated in conjunction with the Well Stroker® and is designed to open and close multiple sliding sleeves in a single run. When the tool is run in the hole, the keys are retracted in the body of the tool. The tool is selective and can be activated at a required depth where the keys will expand and engage a nominated profile. The Well Tractor® conveys the toolstring to target depth where the Well Key® engages the nominated profile, and the Well Stroker® applies the necessary force to actuate the sliding sleeve.
Well Miller ®
Well Cleaner ®
Well Stroker ®
Well Key ®
Well Cleaner ® In essence, the Well Cleaner® can be described as a hydrostatic bailer system that is deployed on the end of the electric wireline. The selective tool can be used to remove sand and debris from the inside of the completion string or to remove debris that has built up on top of downhole isolation barriers. The Well Cleaner® is suited to complement the Well Miller® in scale milling operations. With the recent introduction of the Well Cleaner® PST, it is possible to recover up to 500 liters of sand per run.
Well Miller ® Representing a technological revolution, the Well Miller® has been designed to mill and drill a wide variety of downhole obstructions. Bit designs have been developed to pressure equalize isolation valves and plugs and regain flow paths through isolation valves. The Well Miller® complements the removal of downhole barriers by drilling on the end of electric wireline. Other milling features include milling of cement plugs, removal of scale bridges and nipple profile milling.
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Why Use a Well Stroker®?
The different aspects of mechanical interventions such as gas lift valve retrieval/deployment, setting and retrieving mechanical plugs, manipulating sliding side door devices and opening zonal isolation valves have historically been in the domain of slickline and coiled tubing. By employing the Well Tractor® in conjunction with the Well Stroker®, operators are able to carry out any type of slickline operation in horizontal wells on electric wireline. With the Well Stroker®, it is now possible to open and close zonal isolation valves and sliding side door valves. Setting and retrieving gas lift valves in highly deviated side pocket mandrels is also possible by incorporating the use of a standard kick-over tool. Retrievable
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plugs can be retrieved on standard wireline with the use of the Well Stroker®. The force of the Well Stroker® can replace the use of explosives in packer setting applications, providing enhanced safety and easier logistics.
Case history: setting bridge plug The Well Stroker® is the holder of several world records. In July 2006, the tool was used to set a bridge plug under 300 Sm3/D X-flow offshore Norway, which was a world’s first. The result of the job was reduced water rates from 2150 to 150 m3/sd. Oil rates were maintained while water cut was reduced from 90% to 45%.
Retrievable plugs can be retrieved on standard wireline with the use of the Well Stroker ®
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The Well Stroker® Recent developments have shown that it is feasible to perform mechanical interventions in horizontal wells by applying standard electrical wireline in conjunction with Well Stroker® technology. Since the Well Stroker® was introduced to the market in 2002, the tool has been used to shift sliding sleeves, change out gas lift valves, set and retrieve mechanical plugs and to conduct fishing operations. The Well Stroker® can open and close several sliding sleeves in one run. The advantage is that all these operations can be done without a rig. The Well Stroker® is normally run in conjunction with the Well Key® or a mechanical shifting tool and the Well
Tractor®, which conveys the Well Stroker®/shifting tool to the desired depth i.e. zonal isolation valve or packer. When the Well Stroker® is activated, it anchors itself to the tubing using a fail-safe hydraulic system. Once anchored, it applies an axially focused force, up to 33,000 lbs, through the attached shifting tool. The direction of movement is controlled from the surface each time it is activated. The design of the Well Stroker® is based on the same fail-safe design that is used for the Well Tractor®. Should an operational problem occur, the Well Stroker® is designed to default into safety mode. The anchors will collapse, preventing the tool from getting stuck.
The Well Stroker® is the equivalent of a downhole piston that can produce an axially focused force up to 33,000 lbs.
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Top connector Connects to the Well Tractor® above or cable
Anchor section Anchors the Well Stroker® to the completion before the axially focused force provided by the stroker rod is applied
Stroker rod The Well Stroker® rod provides the axially focused force
Bottom connector Connects to either a Well Key® or a third party shifting tool
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Why Use a Well Key ®?
Top connector Connects to the Well Stroker® above
The Well Key® offers the flexibility to run an intelligent shifting tool. The tool provides maximum flexibility in completion design for optimized production and intervention strategy. The Well Key® complements the concept of intelligent completions that do not require intervention.
Case history: opening isolation valve Anything that slickline can achieve in a vertical well can now be achieved in a horizontal well on the end of electric wireline. For instance, at a sub sea installation, the Well Key® was used in conjunction with the Well Stroker® to open a partly closed isolation valve on electrical wireline. As a result of the operation, full rate production was achieved. Additionally, substantial working hours were saved.
Bull nose The bull nose can be replaced with a bottom connector for connection of logging tools below the Well Key®
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Shifting key The Well Key® can be fitted with two customized shifting keys, enabling shifting upwards and downwards
The Well Stroker® with the Well Key ®? To compliment the Well Stroker ®, the Well Key ® has been developed as a command controlled shifting tool for downhole valves The Well Key® is run in conjunction with the Well Stroker®, which applies the required force to shift a valve once the Well Key® has latched into the shifting profile. When the Well Key is located at the nominated depth, it is activated and put into “search mode”. Depending on the direction in which the valve has to be manipulated, the Well Key® is pushed by the Well Tractor® or pulled by the wireline until the Well Key® latches into the shifting profile. ®
Once the Well Key® has located the shifting profile and has latched into it, the Well Stroker® is powered up to shift the valve.
When the valve has been shifted, the Well Key® will disengage from the shifting profile and continue in search mode. When all valves have been shifted, the search mode will be terminated. The keys retract into the tool, allowing the wireline string to be pulled out of the hole. The use of active hydraulics while the key is in search mode prevents the tool from getting stuck in a sliding sleeve since the nature of the key is inactive. The keys on the Well Key® can be configured according to the specific profile, ensuring compatibility to a range of downhole valves.
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Specifications
-
Yes
Well Stroker®
Well Stroker ®
218 Standard
318 Standard
318 XR *
338 XS *
Body tool OD
2 1/8”
3 1/8”
3 1/8”
3 3/8”
Length
15.3 ft
15 ft
22 ft
13.7 ft
Weight in air
180 lbs
220 lbs
240 lbs
250 lbs
Completion ID,
2.19” - 2.7”
3.2” - 4.7”
3.2” - 4.7”
3.45” - 4.7”
2.5” - 3.2”
5.35” - 6.85”
5.35” - 6.85”
5.35” - 6.85”
Pull/Push force
8,000 - 12,000 lbs**
20,000 lbs
20,000 lbs
33,000 lbs
Stroke length
8”
14”
52”
8”
Surface read out
-
Yes***
Yes***
Yes***
Max. well pressure
25 kpsi
25 kpsi
25 kpsi
25 kpsi
Max. temperature
400º F
400º F
400º F
400º F
Tensile strength
36,000 lbs
42,000 lbs
42,000 lbs
42,000 lbs
Compressive strength
30,000 lbs
50,000 lbs
50,000 lbs
50,000 lbs
Small restrictions configuration
Completion ID, Max. reach configuration
XR: Extended Reach, XS: Extra Strength
*
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Tool configurable
**
Depending on configuration Specifications are subject to change without notice
***
Specifications
Well Key®
Well Key ®
218 Standard
318 Standard
312 Standard
Body tool OD
2 1/8”
3 1/8”
3 1/2”
Length
12 ft
11 ft
11 ft
Weight in air
80 lbs
160 lbs
160 lbs
Completion ID,
2.4” - 5.5” in steps of 0.7”
3.2” - 3.9”
3.62” - 4.28”
5” 5.7”
5.5” to 6.2”
Small restrictions configuration
Completion ID, Max. reach configuration
Max. well pressure
25 kpsi
25 kpsi
25 kpsi
Max. temperature
400º F
400º F
400º F
Tensile strength
30,000 lbs
42,000 lbs
42,000 lbs
Compressive strength
30,000 lbs
50,000 lbs
50,000 lbs
Cable
Applicable to all cable types approved for Well Tractor® operation
Specifications are subject to change without notice
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Why Use a Well Cleaner ®? The Well Cleaner® offers the ability to selectively clean areas of the well bore and remove debris from inside the well. With the latest developments for this system, it is possible for electric wireline cleaning systems to remove up to 500 liters of sand per run from a well (depending on bailer size, type of sand and rig up height). It is being viewed by the operating community as a major breakthrough in the application of ground-breaking technology, reducing the cost of well intervention whilst enhancing production.
Case history: cleaning on wireline When attempting to run a PLT in a 90° deviated well, an operator had to cancel the job due to sand production early in the wellbore. The Well Tractor®, Welltec Release Device® and Well Cleaner® PST (Power Suction Tool) configured with 20.5 ft 4” bailer sections were run in hole and successfully recovered 250 liters of sand over the course of 16 runs.
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Due to the highly modular construction, the Well Cleaner ® is the ideal system for removing sand, scale and other types of debris downhole
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The Well Cleaner® The Well Cleaner® has been designed to remove built-up scale, sand and debris from the inside of the completion profile. It can be configured to fit specific well conditions, collect specified amounts of sand in dry gas wells or dislodge scale from inside the tubing wall. Depending on well conditions and the application, we offer liquid environment and dry environment cleaning systems. Areas of operation for the Well Cleaner® are cleaning nipple seats prior to setting straddle packers or picking up sand inside of the well bore. All Well Cleaner® operations are run on the Well Tractor®, which applies the constant weight on bit and holds the reactive torque away from the electric wireline. To optimize the cleaning of different materials and downhole completion items, it is possible to change the type of cleaning head attached to the end of the Well Cleaner®. Cost-savings are obtained as the tool can be configured to clean even very small areas of the well bore selectively.
Well Cleaner® operations are run in conjunction with a W e l l Tr a c t o r ®, w h i c h a p p l i e s t h e c o n s t a n t w e i g h t o n bit and controls the reactive torque.
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Top connector Connects to the Well Tractor® above
Filtration The capacity of this unit can be configured for the expected amount of debris to be collected
Pump/outlet Provides the circulation through the filtration unit in liquid filled wells
Cleaning Head Several cleaning heads are available depending on the application
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Recent Developments
Welltec® recently introduced a series of new developments within the Well Cleaner® family of tools Well Cleaner ® PST HV
The Well Cleaner® PST (Power Suction Tool) HV (High Vacuum) is the most effective system for certain debris sizes and large drawdown applications.
Well Cleaner PST LD
The Well Cleaner® PST LD (Large Debris) is the most effective wireline cleaning system in the industry for removing sand fill in vertical wells. It can handle various types and sizes of debris in a single run.
Well Cleaner ® PST HF
The Well Cleaner® PST HF (High Flow) is the cleaning system of choice for long bailer sections in horizontal wells because of its high flow rate.
Well Cleaner ® WBH
The Well Cleaner® WBH (Wishbone Honer) is designed to clean finer materials from tubular walls, such as mandrels and profiles, with pinpoint accuracy.
Well Cleaner SVB
The Well Cleaner® SVB (Safety Valve Brush) is an exceptionally precise cleaning device for removing scale and debris from subsurface safety valves while ensuring that full integrity on downhole jewelry is maintained.
®
®
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1. 2.
3. 4.
5. 6.
7.
8.
9. 1. 2. 3. 4. 5.
Well Cleaner® WBH for large area honing Well Cleaner® WBH for small profile honing Well Cleaner® WBH for scale under-reaming Well Cleaner® SVB for safety valve cleaning Well Cleaner® DE for dry environments
6. 7. 8. 9.
Well Cleaner® PST HV for liquid environments Well Cleaner® PST LD for liquid environments Well Cleaner® PST HF for liquid environments Well Cleaner® PST HF for liquid environments
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Specifications
Well Cleaners for liquid environments
*
Well Cleaner ® PST *
318 HV *
318 LD *
318 HF *
218 HF *
Body tool OD
3 1/8”
3 1/8”
3 1/8”
2 1/8”
Length
14.7 ft
12 ft
12 ft
26.6 ft**
Weight in air
200 lbs**
220 lbs**
220 lbs**
220 lbs**
Completion ID
3.4” - 12.6”
3.4” - 12.6”
3.4” - 12.6”
2.19” - 8.2”
Debris volume/5.6 ft bailer
6.38 L - 12.49 L**
6.38 L - 12.49 L**
6.38 L - 12.49 L**
2.52 L - 5.70 L**
Available bailer sizes***
3 1/8”, 3 1/2”, 3 3/4”, 4” 3 1/8”, 3 1/2”, 3 3/4”, 4” 3 1/8”, 3 1/2”, 3 3/4”, 4” 2 1/8”, 2 1/2”, 2 3/4” and 4 1/4” and 4 1/4” and 4 1/4” and 3”
Flow rate
380 L @ 0 bar**
120 L @ 0 bar**
200 L @ 0 bar**
170 L @ 0 bar**
Debris size****
0.0025”-3”
0.0025”-3”
0.0025”-3”
0.0025”-1.5”
Max. well pressure
25 kpsi
25 kpsi
25 kpsi
20 kpsi
Max. temperature
400º F
400º F
400º F
400º F
Tensile strength
38,000 lbs
38,000 lbs
38,000 lbs
24,000 lbs
Compressive strength
50,000 lbs
50,000 lbs
50,000 lbs
50,000 lbs
PST: Power Suction Tools, LD: Large Debris, HF: High Flow, HV: High Vacuum Other sizes available by special request
***
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**
**
**
Depending on configuration
Large object jaws and chamber available on request
****
**
Specifications
Speciality Well Cleaners
Well Cleaner ®
318 WBH *
318 SVB *
312 DE *
Body tool OD
3 1/8”
3 1/8”
3 1/2”
Length
10.3 ft
23 ft
25 ft**
Weight in air
94 lbs**
551 lbs**
220 lbs**
Completion ID
3.4” - 12.6”
3.4” - 8” anchor limit
3.6” - 9.0”
**
Debris volume/5.6 ft bailer
-
-
8.10 L**
Available bailer sizes***
-
-
3 1/2”
Stroke length Brush diameter Debris size
*
**
2 1/8” - 3 1/8”
12” 6”
-
-
-
Max. well pressure
25 kpsi
25 kpsi
25 kpsi
Max. temperature
400º F
400º F
400º F
Tensile strength
42,000 lbs
38,000 lbs
38,000 lbs
Compressive strength
50,000 lbs
50,000 lbs
50,000 lbs
WBH: Wishbone Honer, SVB: Safety Valve Brush, DE: Dry Environment
**
Depending on configuration
0.004” - 2.36”
***
Other sizes available by special request
Specifications are subject to change without notice
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Why Use a Well Miller ®? The electrically driven Well Miller® makes
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it possible to mill and drill on wireline
Our milling technologies offer the opportunity to perform heavyduty well intervention with a light touch. The Well Miller® has revolutionized technology for the oil and gas industry as it enables operators to remove downhole isolation valves or barriers by milling and/or drilling on wireline. Various milling bits, all designed by Welltec®, are available for the Well Miller®. Welltec® also designs custom-made milling bits that enable the tool to engage any obstruction downhole. The Well Miller® has been used to remove isolation valves made of Inconel and Superchrome. It has also been used to remove Barium Sulfate scale bridges in dry gas wells.
In new wells, the Well Miller® has been utilized to establish flow paths through isolation valves, such as flapper valves and ball valves, which have failed to open. The flow paths have been established by cutting out and retrieving a section of the valve that would not open.
Case history: milling of flapper valve At a platform in the UK part of the North Sea, the Well Miller® was used to drill a 1” hole through a flapper valve, allowing full injection rates required for chemical squeezes. Total drilling time was 20 minutes, which was a considerable time saving compared to coiled tubing milling.
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The Well Miller® With its ability to drill and mill on wireline, the Well Miller® represents the next generation o f i n t e r v e n t i o n t e c h n o l o g y.
In many situations, coiled tubing cannot apply the necessary weight on bit to deal adequately with scale build-up. Our wireline milling services utilize the Well Tractor® to ensure a constant, optimized weight on bit regardless of the extension of the well. The cutting face is specifically designed by Welltec remove the obstruction in the well bore.
®
to
The Well Miller® provides operators with the ability to carry out “keyhole surgery” in their completions on the end of electric wireline. This has a radical impact upon the cost of mobilizing conventional intervention equipment. Depending on the application, the Well Miller® also features the ability to pick up the cuttings generated during the milling process, which means that no debris is left downhole.
The Well Miller® provides revolutionary capabilities to oil and gas companies that seek to increase production while reducing costs.
70
Top connector Connects to the Well Tractor® above
Gear The gear ratio can be configured depending on the milling bit requirements
Milling bit Several bit designs are available depending on the application
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Introducing cutting edge technology:
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The Well Miller® NPR milling nipple profiles and tubing collapses on wireline
Welltec® has designed, manufactured and tested a groundbreaking solution for milling nipple profiles; the Well Miller® NPR (Nipple Profile Removal) This solution includes a brand new milling bit that has been developed for the Well Miller® in order to expand the ID of the nipple profile from 3.895” to 4.45” in one run. The purpose of this new development is to expand the nipple profile IDs in order to allow e.g. straddle packers to pass through. However, the Well Miller® NPR can also be applied to partially deformed pipe due to collapse as well as to many other restrictions in the tubulars. For instance, the Well Miller® NPR was mobilized offshore and removed a tubing collapse in a 7” 26# tubing. The whole operation from rig up to rig down took six hours. The Well Miller® NPR provides precision milling without mobilizing heavy surface equipment for circulating and handling fluids and therefore, no risk of damaging the reservoir.
This new tool setup, electronics and software enable us to solve problems never before solved on wireline.
Case history: world’s first nipple milling on wireline The world’s first jobs took place in Indonesia in 2008 where an operator needed to remove a number of nipple profiles. Initially, they had considered coiled tubing but this would require a well kill first, which made Welltec’s lightweight wireline solution the preferred service. Welltec® mobilized with the Well Miller® NPR to enlarge the nipple profiles in eight wells and clear the way for further intervention services. The operator avoided a well kill and had tremendous cost savings compared to CT. Total operating time was 10.5 days and involved less equipment and less people. As of July 2009, Welltec® has successfully enlarged the ID of 16 Super 13 Chrome nipples from 3.697 and 3.570 to 3.7” for this operator.
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The Well Miller® RCB
Milling on wireline and retrieving debris to the surface
Introducing the possibility to mill out obstructions and remove them to the surface, the Well Miller® RCB (Reverse Circulating Bit) stands for a technological breakthrough. When wells display lost production due to mineral deposits, the Well Miller® RCB can mill and also recover the debris in a bailer system. It is also the ideal solution to remove temporary cement plugs.
Furthermore, the Well Miller® RCB reduces the time and man power required for performing services, onshore as well as offshore. Compared to coiled tubing or rig work-over operations, savings in operation time and personnel can be reduced by more than 2/3. Combined with quick returns on investment, this makes the Well Miller® RCB a highly advantageous solution.
The Well Miller® RCB can be mobilized in a matter of hours together with the conveyance solution and required field personnel. This rapid mobilization makes pro-active maintenance of the well site attractive and avoids the cost of a full coiled tubing spread operation.
Case history: preventing costly recompletion
With its unique ability to operate across any depth range, pipe size, high temperature and pressure as well as flowing conditions, the Well Miller® RCB ensures that the well is quickly ready for production, exposed to fewer risks and eliminates a larger intervention in the well.
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Due to suspension of a tubing collapse, an operator was about to pull the completion in a deviated well. As a last attempt prior to pulling the completion, Welltec’s newly developed Well Miller® RCB was called out. Configured with a 3.75” milling bit and two bailer sections, the system successfully milled from 9,890 to 9,940 ft in 20 minutes. After one run, seven liters of debris were recovered and the well was drifted open to 3.75” ID, proving that the tubing was intact. Mobilization was extremely fast for this job; from the meeting with the client until the tools were put onboard a helicopter only took six hours.
Specifications
*
Well Miller®
Well Miller ®
212 Standard
318 Standard
312 Standard
312 RCB *
312 NPR *
Body tool OD
2 1/2”
3 1/8”
3 1/2”
3 1/2”
3.5”
Length
10 ft
10.4 ft - 12.2 ft
10.4 ft - 12.2 ft
25 ft
12.2 ft**
Weight in air
70 lbs**
95 lbs**
95 lbs**
220 lbs**
95 lbs*
Completion ID
2.6”**
3.4”**
3.6”**
> 3.6“
3.6”**
Type
FV, BV, PR***
FV, BV, SB, PR***
FV, BV, SB, PR***
**
**
**
**
NPR*
Debris volume/sections
6 liters**
Max. no. of bailer sections
3 **
Debris size
12 mm – 300 µm
Max. well pressure
25 kpsi
25 kpsi
25 kpsi
25 kpsi
25 kpsi
Max. temperature
400º F
400º F
400º F
400° F
400º F
Tensile strength
36,000 lbs
42,000 lbs
42,000 lbs
38,000 lbs
42,000 lbs
Compressive strength
30,000 lbs
50,000 lbs
50,000 lbs
50,000 lbs
50,000 lbs
RCB: Reverse Circulating Bit, NPR: Nipple Profile Removal
**
Depending on configuration
***
FV: Flapper valve, BV: Ball valve, SB: Scale bridge, PR: Pressure release
Specifications are subject to change without notice
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Welltec Release Device®
The Welltec Release Device® (WRD) is a command controlled release sub, which can be placed anywhere on the wireline toolstring. It can be placed below the Well Tractor® or directly below the cable head. The WRD is designed to facilitate maximum flexibility and can be used in multiple positions at the same time, assuring optimum reliability and dependability. It is possible to use multiple Welltec Release Devices® on the same toolstring as the tools are set to release at different times.
The Welltec Release Device® can be actuated in one of two ways: a) Command from surface b) A timer-executed release will occur after the toolstring has been static and not powered for a pre-specified period of time After the WRD is released, a fishing profile is provided on the toolstring, which is left downhole. This allows conventional fishing operations to take place.
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Specifications
*
Welltec Release Device®
Welltec Release Device ®
218 Standard
Body tool OD
2 1/8”
Length
3.8 ft
Weight in air
22 lbs
Min. completion ID
2.19”
Max. well pressure
20 kpsi/400psi
Max. temperature
300º F
Tensile strength
42 Klbs
Compressive strength
42 Klbs
Wireline configuration
Slickline, mono, multi
Release control
Timer/Surface command*
Depending on configuration Specifications are subject to change without notice
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Prudhoe Bay
Bergen Haugesund
Anchorage
Grande Prairie
Stavanger Allerød
Aberdeen
Bonnyville Calgary
Moscow
Minot
Denver Conway Midland Fort Worth
Farmington
Houston
Baku Al-Khobar
Houma
Abu Dhabi Mumbai
Ciudad del Carmen Maturín
Lagos
Port Harcourt Pointe-Noire
Luanda Macaé Río de Janeiro
Kakinada
Vung Tau Labuan
Kuala Lumpur
Balikpapan
Jakarta
Perth
Copyright © 2009 Welltec A/S All rights reserved. No part of this publication may be reproduced in any form without the written permission of Welltec A/S. Welltec, Well Tractor, Well Stroker, Well Key, Well Cleaner, Well Miller and Welltec Release Device are trademarks of Welltec A/S and may be registered in Denmark and/or in other countries. All products are protected by patents or patent pending.
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Worldwide Contacts
For further deails go to welltec.com
Europe, Russian Federation & CIS - Area VP Alex McKay Welltec Denmark
Welltec Oilfield Services (Azerbaijan) Ltd.
Welltec UK Ltd.
Welltec Oilfield Services (RUS) LLC.
Gydevang 25 3450 Alleroed Denmark
Ahad Yagubov Street 87 Baku Azerbaijan, AZ-1003
Silverburn Crescent Bridge of Don AB23 8EW UK
40/4, Narodnogo Opolchenia str, Moscow, RF, 123298 Russia
Phone: +45 48 14 35 14 Fax: +45 48 14 35 18
Phone: +99 (412) 491 2210 Fax: +99 (450) 491 2211
Phone: +44 (0) 1224 708705 Fax: +44 (0) 1224 704625
Phone: +7 (499) 942 5838 Fax: +7 (499) 943 5938
Jesper Vinge BDM Continental Europe
[email protected]
Alex McKay Area VP Europe, Russian Federation & CIS
[email protected]
Mike Affleck General Manager
[email protected]
Sergey Beryuschev Deputy General Director, BDM
[email protected]
Norway - Area VP Terje Skeie
Subsea Interventions - Global Subsea BDM Ole Eddie Karlsen
Welltec Norway
Welltec
Kokstadflaten 23 Postbox 147 N-5863 Bergen Norway
Stoltenberggt.1 5527 Haugesund Norway
Phone: +47 5592 6300 Fax: +47 5592 6301
Phone: +47 92 46 55 52 Fax: +47 52 86 40 81
Norman Skeie Operations Manager
[email protected]
Ole Eddie Karlsen Global Subsea BDM
[email protected]
79
Worldwide Contacts
For further deails go to welltec.com
Middle East and Africa - Area VP Christian Krüger Welltec Oilfield Services (Saudi Arabia) Limited
Welltec Middle East
Shoaibi Building King Abdulaziz St. P.O.Box 1280 Al-Khobar 31952 Kingdom of Saudi Arabia
Trading and delivery address: Plot No. 34, Sector M38 Mussafah, Abu Dhabi United Arab Emirates
Phone: +966 3 894 1700
Phone: +9712 5511140/+9712 5511961 Fax: +9712 5511962
Phone: +234 (805) 509 34778
Mazen Al-Omari General Manager
[email protected]
Mazen Al-Omari General Manager
[email protected]
Abiodun Akinsanya General Manager
[email protected]
Postal address: Welltec Middle East PO Box 4118, Abu Dhabi United Arab Emirates
Welltec Oilfield Services (Nigeria) Ltd.
Welltec Angola, Lda.
31A Adeniyi Jones Avenue Ikeja, Lagos Federal Republic of Nigeria
Rua 6 - I.L. Boavista Sonils Base Luanda - Angola
Brad Ervin General Manager
[email protected]
Asia Pacific - Area VP Joe Collins Welltec Oilfield Services Pty. Ltd.
Welltec Oilfield Services Sdn. Bhd. (Malaysia)
P.T. Welltec Oilfield Services (Indonesia)
Welltec Oilfield Services (India)
A-1-4, Block-A, Megan Avenue 1 No 189, Jalan Tun Razak 50400 Kuala Lumpur Malaysia
Graha Kapital Building 5th Floor suite 506 Jl. Kemang Raya No. 4 Jakarta Selatan 12730 Indonesia
701, Meadows, Sahar Plaza Complex M.V.Road, Andheri East Mumbai - 400 059 India
Phone: +61 (0) 8 933 15355 +61 (0) 8 933 15379 Fax: +61 (0) 8 933 15322
Phone: +603 2171 1949 +603 2171 1415 +603 2121 1915 Fax: +603 2171 1615
Phone: +62 21 719 8750 Fax: +62 21 718 0781
Joe Collins Area VP Asia-Pacific
[email protected]
Joe Collins Area VP Asia-Pacific
[email protected]
Trading and delivery address: Units 3/4, 80 Forsyth street, O’Connor, Perth Western Australia 6163
80
Postal address: Welltec Oilfield Services Pty. Ltd. PO Box 1655,Melville, Perth Western Australia 6956
Antonius Aji General Manager
[email protected]
Mohan Vaidhyanathan General Manager
[email protected]
North America - Area VP Gregg Lindstrom Welltec Canada Inc.
Welltec US Inc.
Welltec Oilfield Services Mexico S.A.
4860 25th Street S.E. Calgary, Alberta T2B 3M2 Canada
19424 Park Row, Suite 130 Houston, Texas 77084 USA
Calle 51 A # 36 entre calle 22 y Avenida López Mateos, Colonia Pallas, C.P. 24140 Ciudad del Carmen, Campeche México
Phone: +1 403 263 2248 Fax: +1 403 263 2258
Phone: +1 281 398 9355 Fax: +1 281 398 9365
Phone: +52 938 131 0042 +52 938 381 4733
Gregg Lindstrom Area VP North America
[email protected]
Lorne Simmons General Manager
[email protected]
Virgilio León Sanchez General Manager
[email protected]
Asia Pacific - Area VP Joe Collins
South America - Area VP Brian Schwanitz
Welltec Oilfield Services (India)
Welltec do Brasil Ltda.
Welltec Venezuela C.A.
65A. 30/4 Road Thang Nhat Ward Vung Tau City Vietnam
Av. das Americas n° 3333 Sala 816, Barra da Tijuca CEP: 22631-003 Río de Janeiro – RJ – Brasil
Sector La Planta Calle 17 #221 Maturín Estado Monagas Venezuela
Phone: +55 21 2431 0952 Fax: +55 21 2431 0952
Phone: +58 291 642 46 44 Fax: +58 291 642 46 44
Brian Schwanitz Area VP Brian Schwanitz
[email protected]
Angel Luviano Business Delivery Manager
[email protected]
Joe Collins Area VP Asia-Pacific
[email protected]
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