SLP_Std_28_-_CHIKSAN

Well Services Safety Standard 28 Pressure Management Operations

TABLE OF CONTENTS 1. 2. 3. 4. 5. 6. 7. 8.

Statement of the Standard Operating and Safety Procedures Objective Scope Policy Implementation Exemptions Definitions Example

Revised: August 29, 2001

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WS STD-28 Pressure Management Operations

1.

STATEMENT OF STANDARD OPERATING AND SAFETY PROCEDURES Safety Standard 28 is Schlumberger policy to perform jobs only where risks are acceptable. Since apparently low risk pumping jobs may present large risks if the well becomes out of control, pre job risk evaluation is required to determine if a job may be safely performed. This Standard Operating and Safety Procedure provides a system to evaluate and classify risk, defines the notification of line management that is mandatory when risk exceeds certain levels, and sets out training requirements for persons involved in pressure management operations. Additionally this Standard Operating and Safety Procedures specifies minimum distances from the wellhead for rigging up when well control risks are present.

2.

OBJECTIVE To prevent personal injury or damage to equipment due to well blowouts during land pumping operations.

3.

SCOPE This Standard Operating and Safety Procedure applies to land pumping operations. (Offshore Schlumberger well control emergency plans are integrated with the customer’s emergency and well control plans. Offshore, contact Schlumberger Management if Schlumberger plans are not integrated with the customer’s or if there are questions about the customer’s plans.)

4.

POLICY Risk Classification: Schlumberger will perform jobs only where operational risks are acceptable in magnitude. On jobs where the well is out of control or where there is the possibility that the well will become out of control, operational risk must be classified using the methods in this standard. Minimum Distances: In Code Black situations the rig up must be a safe distance and at least 300 feet from the wellhead. Schlumberger personnel must remain at least 150 feet from the wellhead. In Code Red situations the rig up must be a safe distance and at least 100 feet from the wellhead. Use caution when approaching the wellhead. In Code Yellow situations the rig up must be at a safe distance and at least 100 feet from the wellhead. Use caution when approaching the wellhead. In Code Green situations the rig up location must be a safe distance, recommended to be at least 60 feet from the wellhead. The provisions of all Sections of the Well Services Pressure Pumping Standard Operating and Safety Procedures (located: http://quality.sugar-land.dowell.slb.com/qhse/slpm/index.htm) still apply. Notification and Approval: In Code Black, Code Red or Code Yellow situations the Location Supervisor must notify Schlumberger management of the job circumstances, and gain approval to perform the job, prior to rigging up, or as soon as possible after risk conditions have changed. Location Supervisor: Each job shall have a Schlumberger person designated in charge and known as the Schlumberger Location Supervisor.

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WS STD-28 Pressure Management Operations

Pressure Management Training - Level 1: All operations personnel in land locations are required to undertake Pressure Management Training – Level 1 provided by the Schlumberger Pressure Management Awareness Training Package. Pressure Management Training - Level 2: Locations performing pressure management jobs are required to have at least one person with current Pressure Management Training – Level 2. Pressure Management Training – Level 2 consists of Well Control Training by a industry recognized trainer; at least a three day school with a one day refresher every third year. Customer Safety Policies: Schlumberger will comply with customer safety policies and procedures as long as those policies and procedures meet or exceed Schlumberger Standards and Standard Operating and Safety Procedures. 5.

IMPLEMENTATION

5.1

Code Black Conditions

In Code Black Conditions:

⇒ ⇒ ⇒ ⇒

Notify Management (see Section 5.3). Obtain Management approval prior to rigging up. Rig up at a safe distance, not closer than 300 feet. Schlumberger personnel must remain at least 150 feet from the wellhead; including when making the treating iron connection to the well. The customer or personnel from the well control company will perform operations that are within 150 feet of the wellhead.

Code Black Conditions are:

⇒ ⇒ ⇒ ⇒

When there are hydrocarbon leaks, or When there is fire at the wellhead, or When wellhead pressure exceeds the pressure rating of the BOP stack or wellhead, or When there is airborne H2S at a concentration of more than 10 ppm.

⇒ Be Alert. React to changes in conditions that increase the risk.

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WS STD-28 Pressure Management Operations

Risk Code

Risk Code Table C

Condition Level

5.2

Black

B

A

Yellow

Red

2

3

Green

1

Preparation Level Risk Code

Course of Action

Code Black

Notify management. Obtain approval before rigging up. Rig up at a safe distance not closer than 300 feet. Schlumberger personnel must remain at least 150 feet the wellhead; including when making the treating iron connection to the well The customer or personnel from the well control company will perform operations within 150 feet of the wellhead.

Code Red

Notify management. Obtain approval before rigging up. Rig up at a safe distance, at least 100 feet from the wellhead. Refer to Pressure Pumping and Location Safety.

Code Yellow

Notify management. Obtain approval before rigging up. Rig up at a safe distance, at least 100 feet from the wellhead. Refer to Pressure Pumping and Location Safety

Code Green

Proceed with care. Rig up at a safe distance. Refer to Pressure Pumping and Location Safety. Always take steps to reduce risk to the lowest reasonable level Be Alert to Changing Conditions React to the New Conditions - Notify Management

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WS STD-28 Pressure Management Operations

Instructions for Risk Classification & Management Notification • • • • • •

Begin this process when a pump rental job is called in. Gather job information. Use the Pressure Management Data Sheet. Answer the questions on the Conditions Questionnaire and Preparation Questionnaire; circle the correct answers to the questions. Determine the Condition Level (A, B, or C) by noting the highest ranked column containing a circled answer. (Example : even a single circled answer in column C fixes the Hazard at Level C) Determine the Preparation Level (in the same manner as the Hazard level). Determine the risk code on the Risk Code Table. Select the square corresponding to the Hazard Level and the Preparation Level determined on the questionnaires. ~~~~~~~~~~~~~~~~~~~~

• • • • • •

Take all reasonable steps to reduce risk to a lower level. If you assess the situation as Code Black, notify management per section 5.3. Obtain approval to rig up. Rig up at a safe distance, at least 300 feet from the wellhead. Approach no closer than150 feet from the wellhead. If you assess the situation as Code Yellow or Code Red, notify management per section 5.3. Obtain approval to rig up. Rig up at a safe distance, at least 100 feet from the wellhead. Approach to the wellhead with caution. If you asses the situation as Code Green, rig up at a safe distance. Proceed with care. Refer to Pressure Pumping and Location Safety. Use the Pressure Management Data Sheet to gather critical information. Use the Pressure Management Planning Checklist at each stage of preparation. Be alert for changes in the situation - pause, and re evaluate. Contact management if the situation changes, if your assessment of the risk changes, or if you are unsure of the risk.

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WS STD-28 Pressure Management Operations

Conditions Questionnaire Item Code Black Hazards

A

Is there fire at the wellhead? Will the wellhead pressure exceed the BOP or wellhead rating? Is there airborne H2S at concentration greater than 10 ppm? With pressure at surface is the BOP or wellhead rating unknown? Is the well out of control? Is there a leak of oil or gas from the well?

No No No No No No

Is the well under hydrostatic control? Is there a surface leak on the wellhead, BOP, or casing? Has the well recently taken a kick? Is the BOP test current? Does the customer have a well control plan? Is there H2S on this well? Is the evacuation route clear and unobstructed? Is the rig up area up wind from the well?

Yes No No Yes Yes No Yes Yes

Hazard Level B C Yes Yes Yes Yes Yes Yes No Yes Yes No No Yes No No

Preparation Questionnaire Preparation Level 1 2 3

Item Is there is an adequate quantity of treating iron? Does the rig up conform to Pressure Pumping and Location Safety Standard Operating and Safety Procedures? Are there threaded connections in the customer’s line? Is the Schlumberger Location Supervisor named? Is the customer representative clearly established? Are the communication channels clearly established? Is communication equipment available? Is there adequate HHP to meet the job requirements? Are contingency plans defined (see check list)? Is a Level 2 – Pressure Management trained employee available? Are all crew members trained at Level 1 - Pressure Management? Is the PPE available and in working condition? Are emergency Services identified? Are there radioactive sources on the Schlumberger equipment? Has management provided information about the customer’s safety management system & emergency plans?

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Yes Yes

No No

No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes

Yes No No No No No No No No No No Yes No

WS STD-28 Pressure Management Operations

5.3

Management Notification

Risk Code

Who is to be Notified

Who is Authorized to Approve

Code Green

Location Supervisor

Location Supervisor

Code Yellow

Operations Manager

Operations Manager

Code Red

Schlumberger Business Unit Mgr, Area Asset Mgr, OFS Area President or Schlumberger Worldwide OPS Mgr

Schlumberger Business Unit Mgr, Area Asset Mgr, OFS Area President or Schlumberger Worldwide OPS Mgr

Code Black

Revised: August 29, 2001

Schlumberger Business Unit Mgr, Area Asset Mgr, OFS Area President or Schlumberger Worldwide OPS Mgr

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Schlumberger Business Unit Mgr, Area Asset Mgr, OFS Area President or Schlumberger Worldwide OPS Mgr

WS STD-28 Pressure Management Operations

5.4 Pressure Management - Planning Checklist (Page 1 of 2) Prior to Dispatching Crew or Schlumberger Equipment • Complete the Operations Data Sheet; information obtained by phone or site visit …. • Perform a Preliminary Risk Categorization….……………………………………………. Notify the Schlumberger Operations Manager of … • Job conditions ……………………………………………………………………………. • Preliminary Risk Code determination …………………………...……………….…….. Verify Crew Training • Pressure Management Operations …………………………………………………….. • PPE ………………………………………………………………………………………. • H2S ……………………………………………………………………………………….. • Safety Pressure Pumping and Location Safety………………………………………... Insure that equipment is adequate • PPE ….………………………………….……………………………….………………… • HHP ……………..……………………………………………………….………………... • Treating Iron ……………..……………………………………………………….………. • Correct Connection to the Well …………………………………………………………... (also : avoid units containing a radioactive source) Prior to Entering the Location • Survey the Site. …………………………………………………………………………….. • Establish the rig up plan ………………………………………………………………….. • Establish the escape routes and muster areas ..……………………………………….. • Establish a buddy system………………………………………………………………….. • Confirm the PPE requirements ………………………………...………………………. • Designate the persons in charge ………………………………………...…………….. • Recategorize the Risk ..…………………………...……………………………….…… • Communicate with Schlumberger Line Management …………………………….…….. • Meet with the Customer, agree on plans …….………………………………….……… • Hold the per rig up Meeting ………………………………………...…………………… Prior to Starting Operations • Clear the area of unnecessary equipment ……………………………………………... • Clear the area of unnecessary personnel ……………………………………………… • Hold the Pre Job Safety Meeting ……………………………………………………. During the Operations • Communicate with crew and customer. Be alert to changes in risk conditions …..... • Continually re evaluate and recategorize the risk …….……………………….……… • If conditions change, implement contingency plans …………………………………… • • • • • • •

Revised: August 29, 2001

…………….. …………….. …………….. …………….. …………….. …………….. ……………..

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__________________ __________________ __________________ __________________ __________________ __________________ __________________

WS STD-28 Pressure Management Operations

Pressure Management - Planning Checklist (Page 2 of 2) Contingency Plans Operational Contingencies • Fluid returns contingencies (diversion) plans are established …......…………… …. • Schlumberger Pumper Isolation procedure is established …………………………….. • Shut in procedure is established ……………... …………………………………………. Emergency Shut Down • What is the emergency shut down pressure ……………. __________________ • Other conditions that could trigger emergency shut down … __________________ • Who will issue the order to shut down ……….. ………….. __________________ Personnel Evacuation • Evacuation route is identified …………………………………………………….………. • Personnel muster area is identified ….………………………………………….……... • Who will issue the evacuation order .…………….………. __________________ • Who will perform the headcount in the muster area .……… __________________ Equipment Evacuation • Person that will issue the equipment evacuation order .… __________________ • Equipment disconnect procedure and responsibilities are defined ….………………... • Evacuation route is identified …………………………………………………….………. • Equipment muster area is identified ….………………………………………….……... Line of Command – Phone Numbers • Location Supervisor …… …………………………………. __________________ • FSM ……………………………………………………….. __________________ • Operations Manager .……………………….……………. __________________ • Schlumberger Worldwide Hotline Contact USA 281 467 8444 _________________ • • • • • • • • • • • • • • •

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…………….. …………….. …………….. …………….. …………….. …………….. …………….. …………….. …………….. …………….. …………….. …………….. …………….. …………….. ……………..

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__________________ __________________ __________________ __________________ __________________ __________________ __________________ __________________ __________________ __________________ __________________ __________________ __________________ __________________ __________________

WS STD-28 Pressure Management Operations

5.5 Operations Data Sheet Pressure Management Data Sheet (Page 1 of 2) Customer & Well Customer __________________________ Field ____________________________ Well Name __________________________ Location __________________________ Rig ____________________________ Rig Phone __________________________ Customer Representative (Name & Phone) _____________________________________________________________________

Services Requested Schlumberger Location Supervisor ____________________________________________________________________________ Services requested ________________ Rig Up Distance (From Wellhead) __________ Fluid to be pumped __________________ Schlumberger Connection to Well _____________________________________________________________________________

Well Data and Condition Well History _______________________________________________________________________________________________ _________________________________________________________________________________________________________ Recent Kicks ______________________________________________________________________________________________ Present Situation __________________________________________________________________________________________ Mud: Type _________________ Wt _____________ Reserve Mud Type ____________ Reserve Volume _______________ Pressure: Tubing or Drill Pipe __________________________ Annulus ________________________________________________ BOP Stack Pressure Rating ________________ BOP/Kill Line Connection _________________________ Last BOP Test: Date _____________________ Pressure _________________ Pass or Fail _________________________ H2S Present ________________ Concentration _______________________________ Downhole Abnormalities (fish, debris, damage, sand, hydrates, wax) _______________________________________ Drill String or Tubing Data Type _____________ Size ________________ Weight (lb/ft) _______________ Connection ______________ Type _____________ Size ________________ Weight (lb/ft) _______________ Connection ______________ Type _____________ Size ________________ Weight (lb/ft) _______________ Connection ______________ Casing Data Type _____________ Size ________________ Weight (lb/ft) _______________ Shoe Depth ______________ Type _____________ Size ________________ Weight (lb/ft) _______________ Shoe Depth ______________ Type _____________ Size ________________ Weight (lb/ft) _______________ Shoe Depth ______________ Open Hole Data Bit Size ________________ Top ___________________ TD _________________ Other information ______________________________________________________________________________

Location Directions to location ___________________________________________________________________________________________ _____________________________________________________________________________________________________________ _____________________________________________________________________________________________________________

Schlumberger Contractor Company Persons in Charge Contract Driver Company ________________________________ Other__________________________________________________ Treating Iron Rental Company ____________________________ Other__________________________________________________

Emergency Service Phone Numbers Ambulance ____________________________ Fire Service _______________________ Hospital _____________________________ Police-Sheriff __________________________ Other _______________________ Other _______________________________ H2S Safety Equipment Provider _________________________________________________________________________________

Schlumberger Communication Crew Members with Radios _____________________________________________________________________________________ Local Manager (Office) _________________ (Home) _________________ (Mobile) _________________ (Pager) ________________ Schlumberger Wellsite Mobile Phone ______________________________ Crew Member Holding Phone ______________________ Schlumberger Hot Line USA 281 467 8444 - Hot Line Contact (Name) ________________________________________________ Schlumberger Contractors – Persons in Charge _____________________________________________________________________

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WS STD-28 Pressure Management Operations

Pressure Management Data Sheet (Page 2 of 2) Job Plan Job Description ____________________________________________________________________________________________ _________________________________________________________________________________________________________ Crew Assignments _________________________________________________________________________________________ _________________________________________________________________________________________________________ Key Responsibilities Location Supervisor _______________________ Operation of Annular Choke Manifold _________________________________ Returns Pit Monitor _______________________ Other __________________________________________________________ Key Job Parameters Pressure and Rate Expected _______________________________________________________________________________ Pressure and Rate – Limits Schlumberger Equipment ________________________ Trip Settings __________________________ BOP ______________________________ Tubing ______________________________ Casing ____________________________ Others ______________________________ Persons with First Aid Training _______________________________________________________________

Connection to the Well : Schlumberger Connection or Flange Physically Verified Correct Are there threaded connections in customer’s lines?

Yes Yes

No No

On Site Verifications : Are Flammable Fluids Present on Site Is the BOP Test Current Emergency Services on Site:

Fire

Yes No Yes No Medical

H2S

Wellsite Diagram

Make Note Of : • • • •

Rig Up Location Rig Up – Distance from wellhead H2S Detectors – Location Gas Detectors – Location

Revised: August 29, 2001

• • • •

Evacuation Route(s) – Personnel Muster Area(s) – Personnel Flare and/or Diverter Line Hazards (cranes, flowlines, tanks)

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• Evacuation Route(s) – Equipment • Muster Area(s) – Equipment • Wind Direction •

WS STD-28 Pressure Management Operations

5.6 Rig Up Diagram Code Black Conditions: Approach no closer that 150 feet from the wellhead

Code Black Conditions: Rig Up at Least 300 feet from the wellhead. Code Red or Code Yellow Situations: • Minimum Equipment Rig Up Distance The greater of : • 100 feet from well, or • Outside of Derrick Fall Line. • Use caution when approaching the well head.

To additional pump(s) Chok e

2” X 2” Valves

Revised: August 29, 2001

Check Valve

2” X 1” Valves Rig

Flare Line

2” X 2” Control Valve

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WS STD-28 Pressure Management Operations

5.7 Responsibilities Operations Management Responsibilities - ensure that all operating personnel receive Level 1 training on this Standard Operating and Safety Procedure. - ensure that the location has at least one person Level 2 trained person available before undertaking a Pressure Management job at Code Yellow, Code Red, or Code Black. Sales, Logistics and Support Personnel Responsibilities - obtain as much information as possible, as early as possible. - notify line management when the risk code Yellow, Red, or Black. - ask questions and seek additional information in order to quantify the level of risk. - communicate job information to management and to the Location Supervisor so that jobs can be done with the lowest possible risk. Location Supervisor Responsibilities: - Quantify the level of risk, using the approach in this standard. - When the risk code is Black: Notify management and obtain approval. Rig up at least 300 feet from the wellhead. Do not allow Schlumberger personnel to approach closer than 150 feet from the wellhead. Perform the job being alert to changes that increase risk. - When the risk code is Red or Yellow: Notify management and obtain approval. Rig up at least 100 feet from the wellhead. Perform the job being alert to changes that increase risk. - When the risk code is Green: Perform the job being alert to changes that increase risk. - Plan and perform jobs in a manner minimizes risk 6.

Exemptions Exemptions to this standard require the approval of SDC Management and Technique via the exemption procedure defined in OFS QHSE Standard S10.

7.

Definitions Fall Radius - The horizontal distance from the well head equal to the total height of the rig, where total height is measured from ground level to the upper most point of the rig. Kick - Unwanted entry of water, gas, oil, or other formation fluid into the well bore. Location Supervisor - The person designated in charge of Schlumberger operations on a job location. The Location Supervisor has overall authority for Schlumberger operations as well as responsibility for communications with the client and with the third parties contracted by Schlumberger. Site Survey - Survey of the job to identify hazards so that risk can be minimized. Well Control - The practice of controlling well pressure. Maintaining the well in a state of equilibrium, with the formation pressures contained either by well bore hydrostatic pressure (primary) or by mechanical pressure control equipment (secondary), such as BOPs, plugs or packers. Well Control Equipment - Equipment used to maintain control of the well; BOP, Hydril, flanges, threaded connections, valves, etc. Well Control Plan - A sequence of actions designed to control pressure kicks and return the well to normal hydrostatic control.

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WS STD-28 Pressure Management Operations

8.

Example One

The People: Sales Engineer Schlumberger Operations Manager Area Asset Manager Schlumberger Location Supervisor Company Man

: Sam Speaker : Billy Wilson : Phil Thompson : Harold Smith - GSS : Chester Long

The Story: It’s 2:30 PM on Friday when District Sales Engineer, Sam Speaker, receives the call. The largest independent oil operator in the area needs a pump unit to help kill a well being drilled 35 miles south west of the district shop. The well has taken a kick and is shut in with the bit near bottom. Sam phones the dispatcher, and contacts Operations Manager, Billy Wilson, telling him that a Pressure Management job is unfolding. Sam makes a call to the drilling rig office, seeking more information. In spite of repeated attempts, the phone is not answered. 2:35 PM - Billy Wilson contacts Schlumberger Area Asset Manager Phil Thompson advising that a Pressure Management job is being mobilized and that details will follow. 3:00 PM - GSS Harold Smith, one assistant, and a double pump cementer carrying 120 feet of treating iron, depart for the jobsite. Harold has been to a well control school, and his assistant’s QHSE training is up to date, including Standard Operating and Safety Procedures for Pressure Management Operations (this Standard Operating and Safety Procedures) 4:00 PM - Arriving on location GSS Harold Smith surveys the situation. Careful not to miss important details he uses the Pressure Management Data Sheet and the Pressure Management Planning Checklist. He learns that the BOPs, rated at 5,000 psi, are in top shape and were tested just yesterday. There is 3,900 psi on the annulus and 3700 psi on the drill pipe. The rig crew has just finished mixing 200 bbl of 15 lb per gallon kill mud. There is no mud engineer on site. 4:20 PM - Company man Chester Long, well known in the area for fast drilling times, is in a hurry. “Rig up and get on with it” advises Chester, “I want to be cementing casing by this time tomorrow.” Chester requests that Schlumberger pump kill mud at 20 bpm and 4,500 psi down the drillpipe, proposes a location for the Schlumberger Pumper adjacent to the rig fuel tanks. While there is a clear path to the road, the rear of the Schlumberger pumper would be 75 feet from the wellhead. The kill program has been detailed by Chester using templates from a well control school.

~~~ Stop here. Determine the Risk Code for this job – as it has unfolded so far. ~~~ ~~~ Use the Condition Questionnaire, the Preparation Questionnaire, and the Risk Code Table. ~~~

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WS STD-28 Pressure Management Operations

Example One - Harold’s Initial Risk Assessment Conditions Questionnaire Item Code Black Hazards

A

Hazard Level B C

Is there fire at the wellhead? Will the wellhead pressure exceed the BOP or wellhead rating? Is there airborne H2S at concentration greater than 10 ppm? With pressure at surface is the BOP or wellhead rating unknown? Is the well out of control? Is there a leak of oil or gas from the well?

No No No No No No

Is the well under hydrostatic control? Is the surface pressure between 70% and 100% of BOP rating? Is there a surface leak on the wellhead, BOP, or casing? Has the well recently taken a kick? Is the BOP test current? Does the customer have a well control plan? Is there H2S on this well? Is the evacuation route clear and unobstructed? Is the rig up too close to the well head? Is the rig up area up wind from the well?

Yes No No No Yes Yes No Yes No Yes

Yes Yes Yes Yes Yes Yes No Yes Yes Yes No No Yes No Yes No

Preparation Questionnaire Preparation Level 1 2 3

Item Is there is an adequate quantity of treating iron? Does the rig up conform to Pressure Pumping and Location Safety Standard Operating and Safety Procedures? Are there threaded connections in the customer’s line? Is the Schlumberger Location Supervisor named? Is the customer representative clearly established? Are the communication channels clearly established? Is communication equipment available? Is there adequate HHP to meet the job requirements? Are contingency plans defined (see check list)? Is a Level 2 – Pressure Management trained employee available? Are all crew members trained at Level 1 - Pressure Management? Is the PPE available and in working condition? Are emergency Services identified? Are there radioactive sources on the Schlumberger equipment? Has management provided information about the customer’s safety management system & emergency plans?

Revised: August 29, 2001

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Yes Yes

No No

No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes

Yes No No No No No No No No No No Yes No

WS STD-28 Pressure Management Operations

Example One - Harold's Initial Risk Assessment

Condition Level

Risk Code Table C

Black

B

Yellow

Red

2

3

A

Green

1

Preparation Level

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WS STD-28 Pressure Management Operations

Example - The Story – Continued 4:21 PM - Harold has already assessed the Risk for this job and says “According to the Schlumberger system this is a Code Red Situation. I am obliged to inform my management. I’ll need their approval to rig up. In a Code Red Situation I need to be at least 100 feet from the wellhead. I will request more treating iron, and, to get the necessary rate, second pumper. I’ll rig up on the shoulder of the access road. That will put my people and equipment just over 150 feet from the well head. Rigging up there will change my situation to Code Yellow.” After some discussion, Chester agrees. 4:25 PM - Harold makes the call to Billy Wilson. “Billy”, he says, “we are in a Code Red situation here. 5,000 psi stack with 4,100 psi on the annulus. In order to drop to Code Yellow I need a second pumper with more treating iron. “ Billy dispatches a second pumper with iron on board. Billy and Harold agree that the situation is now Code Yellow and that the job can go ahead. Billy grants approval. Until the job is completed Harold will call in periodically, advising if or if not the situation code has changed. 4:35 PM - Billy Wilson calls Schlumberger Area ASSET Manager Phil Thompson to tell him that the Pressure Management Job is a Code Yellow. Approval to rig up has been granted. Billy agrees to call again if the situation becomes Code Red. Example … continued - Harold’s Second Risk Assessment

Condition Level

Risk Code Table C

Black

B

Yellow

Red

2

3

A

Green

1

Preparation Level

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WS STD-28 Pressure Management Operations

Example ... continued - Harold's Second Risk Assessment Conditions Questionnaire Item Code Black Hazards

A

Hazard Level B C

Is there fire at the wellhead? Will the wellhead pressure exceed the BOP or wellhead rating? Is there airborne H2S at concentration greater than 10 ppm? With pressure at surface is the BOP or wellhead rating unknown? Is the well out of control? Is there a leak of oil or gas from the well?

No No No No No No

Is the well under hydrostatic control? Is the surface pressure between 70% and 100% of BOP rating? Is there a surface leak on the wellhead, BOP, or casing? Has the well recently taken a kick? Is the BOP test current? Does the customer have a well control plan? Is there H2S on this well? Is the evacuation route clear and unobstructed? Is the rig up too close to the well head? Is the rig up area up wind from the well?

Yes No No No Yes Yes No Yes No Yes

Yes Yes Yes Yes Yes Yes No Yes Yes Yes No No Yes No Yes No

Preparation Questionnaire Preparation Level 1 2 3

Item Is there is an adequate quantity of treating iron? Does the rig up conform to Pressure Pumping and Location Safety Standard Operating and Safety Procedures? Are there threaded connections in the customer’s line? Is the Schlumberger Location Supervisor named? Is the customer representative clearly established? Are the communication channels clearly established? Is communication equipment available? Is there adequate HHP to meet the job requirements? Are contingency plans defined (see check list)? Is a Level 2 – Pressure Management trained employee available? Are all crew members trained at Level 1 - Pressure Management? Is the PPE available and in working condition? Are emergency Services identified? Are there radioactive sources on the Schlumberger equipment? Has management provided information about the customer’s safety management system & emergency plans?

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Yes Yes

No No

No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes

Yes No No No No No No No No No No Yes No

WS STD-28 Pressure Management Operations

Example - The Story – Continued 4:45 PM - Harold and assistant begin rigging up. Harold visits the rig floor only once, witnessing the connection of the Schlumberger treating line to the standpipe manifold. 5:30 PM - The second double pump cementer and the needed treating iron arrive on location. 6:00 PM - Chester and the entire rig crew are present as Harold holds and information packed tailgate meeting. Harold uses the Pressure Management Operations Checklist as a guide during the meeting. Chester confirms his kill program pressure predictions and goes over the assignment of the rig crew. Contingency and emergency plans are discussed until Harold is sure everyone understands. 6:45 PM - The kill program begins. 9:00 PM - The kill program is completed, without incident; the rig pumps take over at a normal circulating pressure.

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WS STD-28 Pressure Management Operations

Revision History Revision:

Effective Date:

G

April 2001

Modifications

Prepared by :

Well Services Operations Support

Latest revision approved by:

Warning: The controlled source document of this Standard is stored on the Schlumberger OFS QHSE WWW homepage. Any paper version of this Standard is uncontrolled and should be compared with the source document at time of use to ensure it is up-to-date.

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WS STD-28 Pressure Management Operations