NOV-Drilling-Jars.pdf

DRILLING JARS

Drilling Jars

Performance tools for all drilling applications

Robust tools for challenging drilling conditions

Enhancement tools for complex drilling

Industry leading tools for all downhole complications

NOV Downhole is the largest independent downhole tool and equipment provider in the world. We operate over 50 service facilities in 16 countries, delivering solutions, service,

Effective tools for well restoration and enhancement

and expertise globally. We design, manufacture, and service the complete bottom hole assembly. In short, we

Effective tools to bring the well on line and manage production

provide end-to-end solutions to meet all of your downhole needs. With more than 450,000 square feet of manufacturing facilities and a highly skilled and growing workforce, NOV Downhole has the capacity to produce and support the industry’s leading selection of tools; furthermore, we have the ability to work with our customers to design and develop their own proprietary technologies.

Make-up and break-out tools for efficient maintenance

We take pride in our reliability and the peace of mind we bring to our customers. Our global reach, vast range of tools, and experienced personnel enable us to support our customers for all downhole applications.

Rugged testing equipment to measure tool performance

Utilized to maintain your downhole tools

Sharing knowledge of our tools

Minimizing risk for ultimate dependability

Service support to ensure client confidence

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DRILLING JARS Creating Impact Forces to Free a Stuck Drillstring When planning a drilling program, one must factor in the possibly of the drillstring becoming stuck. This unpredictable event can be mitigated by placing a drilling jar in the bottom hole assembly (BHA). A drilling jar is used to create an impact and impulse force to jar free a stuck drillstring. This is achieved by the conversion of strain energy into kinetic energy which accelerates the “hammer” to collide with the “anvil” to create a tremendous blow. NOV Downhole provides the most versatile range of drilling jars for drilling straight, directional, horizontal, or extended reach wells. NOV Downhole DrillPro and DrillTough Drilling Jars provide consistent and reliable jarring performance for extended periods of time regardless of the bottom hole environment. Engineered with high tensile and torsional strengths, specific types of hydraulic delay metering systems, and mechanical mandrel latches, our drilling jars can be placed in the BHA in tension, neutral, or compression.

Hydraulic / Mechanical Drilling Jar

Double Acting Hydraulic/ Mechanical Drilling Jar

Combines the characteristics of both a hydraulic upstroke jar and a mechanical downstroke jar; features a mechanical latch

Hydraulic upstroke and downstroke jar featuring a mechanical latch

Ideal for virtually all drilling operations

Ideal for running in the lower BHA in compression or in the upper BHA in tension

PowerStroke Drilling Jar Pure hydraulic upstroke and downstroke jar; creating infinitely variable impacts Ideal for directional, horizontal, and extended reach drilling

Build a BHA Consider these additional products from NOV Downhole when making your equipment decisions: Drill Bits

Shock Tools

Drilling Collars

Drilling Motors

Non-Magnetic Drilling Tools

Drilling Jar Intensifiers

Reamers

Stabilizers

Drillpipe

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Hydraulic / Mechanical Drilling Jar The NOV Downhole DrillPro Hydraulic / Mechanical Drilling Jar (HMJ) is well suited for virtually all drilling conditions. The HMJ is engineered to overcome the limitations associated with pure hydraulic or mechanical jars, yet retain the advantages of both types. The DrillPro HMJ is a hydraulic delay upstroke jar and mechanical downstroke jar featuring a mechanical latch which holds the mandrel in place during tripping and drilling operations. To jar upward, overpull is applied to the drillstring until the preset mechanical latch setting is overcome allowing the jar to enter into the hydraulic delay sequence. The desired overpull, above free string weight, is taken up as the jar opens slowly under hydraulic restriction (delay) after which the jar enters the free stroke and the mandrel accelerates to the fully extended position creating the upward jarring impact. Lowering the drillstring resets the latch making the HMJ ready for another jarring cycle or to resume drilling operations. To jar down, the drillstring is lowered until the compressive force applied exceeds the present mechanical latch setting. Once the latch releases, the mandrel accelerates to the fully closed position to create the downward jarring impact. Raising the drillstring until free movement stops indicates the latch has reset and the HMJ is prepared to jar again or to continue drilling operations.

Features

Benefits



Hydraulic delay upstroke jar and mechanical downstroke jar



Mechanical latch – adjustable release settings



Simple to operate; requires no torque application in the jarring procedure



Jet type metering device for the hydraulic delay



Jar placement can be in tension, neutral, or compression



No unexpected jarring while making connections or drilling



Continuous and consistent jarring performance

Hydraulic/Mechanical Drilling Jars Outside Diameter Inside Diameter

inches (mm) inches (mm)

4-3/4 (121) 2-1/4 (57)

6-1/4 (159) 2-1/4 (57)

6-1/2 (165) 2-3/4 (70)

6-3/4 (171) 2-1/2 (64)

Assembly Number

380

447

474

340

Maximum Hole Diameter* inches 7-7/8 9-7/8 12-1/4 12-1/4 (mm) (200) (251) (311) (311) Maximum Jar Load [Up/Down lbf 75,000 160,000 180,000 190,000 (N) (333,600) (711,700) (800,600) (845,100) Tensile Yield Strength lbf 354,000 755,000 865,000 828,000 (N) (1,574,600) (3,358,400) (3,847,700) (3,683,100) Torsional Yield Strength** lbf-ft 16,000 41,000 41,000 40,000 (N-m) (21,600) (55,500) (55,500) (54,200) Total Stroke inches 12 15 16 15 (mm) (292) (381) (406) (381) Up Latch Setting, Standard lbf 40,000 90,000 90,000 90,000 (N) (177,900) (400,300) (400,300) (400,300) Maximum lbf 55,000 140,000 140,000 140,000 (N) (244,600) (622,700) (622,700) (622,700) Down Latch Setting, Standard*** lbf 18,000 40,500 40,500 40,500 (N) (80,000) (180,100) (180,100) (180,100) Maximum lbf 24,750 63,000 63,000 63,000 (N) (110,000) (280,200) (280,200) (280,200) Pump Open Area in² 6.5 9.6 11.0 11.0 (mm²) (4,200) (6,200) (7,100) (7,100) Length [Latched Position] feet 12.7 16.3 18.5 15.0 (m) (3.9) (5.0) (5.6) (4.6) Weight lb 0550 1,300 1,500 1,400 (kg) (250) (590) (690) (640)

7 (178) 2-1/2 (64)

8 (203) 2-13/16 (71)

9 (229) 2-13/16 (71)

9-1/2 (241) 2-13/16 (71)

450

336-20

354

381

12-1/4 17-1/2 26 26 (311) (445) (660) (660) 190,000 220,000 250,000 250,000 (845,100) (978,600) (1,112,000) (1,112,000) 828,000 965,000 1,225,000 1,225,000 (3,683,100) (4,292,500) (5,449,000) (5,449,000) 40,000 68,000 110,000 112,000 (54,200) (92,100) (149,100) (151,800) 15 14 15 15 (381) (366) (381) (381) 90,000 95,000 100,000 100,000 (400,300) (422,500) (444,800) (444,800) 140,000 150,000 155,000 155,000 (622,700) (667,200) (689,400) (689,400) 40,500 42,750 45,000 45,000 (180,100) (190,100) (200,100) (200,100) 63,000 67,500 69,750 69,750 (280,200) (300,200) (310,200) (310,200) 11.0 14.2 15.9 15.9 (7,100) (9,170) (10,260) (10,260) 15.0 15.5 15.0 15.0 (4.6) (4.7) (4.6) (4.6) 1,600 2,200 2,700 3,000 (730) (1,000) (1,300) (1,400)

*  Hole openers not recommend ** Torsional Yeild Strength rating is based on the yeild of the body connections independent of tool joint connections *** Down Latch Setting is 45% + or - 5% of the Up Latch Setting

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DRILLING JARS Double-Acting Hydraulic/Mechanical Drilling Jar The NOV Downhole DrillTough Double-Acting Hydraulic / Mechanical Drilling Jar is a hydraulic delay upstroke and downstroke jar featuring a mechanical latch making it a versatile drilling jar for complex drilling programs. The DrillPro Double-Acting HMJ is similar to the HMJ in design and operation; however, it has the benefit of a hydraulic delay downstroke jar making it effective for directional, horizontal, and extended reach drilling. This jar is ideal for compression placement in the drillstring because there is no “bleed through” operation required when tagging or picking up off bottom.

Features

Benefits



Hydraulic delay upstroke jar and mechanical downstroke jar



Simple to operate; requires no torque application in the jarring procedure



Mechanical latch – adjustable release settings



Jet type metering device for the hydraulic delay



No unexpected jarring while making connections or drilling



Jar placement can be in tension, neutral, or compression



Continuous and consistent jarring performance



Effective in high friction directional, horizontal, or extended reach wells

Double-Acting Hydraulic/Mechanical Drilling Jars Outside Diameter Inside Diameter

inches (mm) inches (mm)

4-3/4 (121) 2-1/4 (57)

6-1/4 (159) 2-1/4 (57)

6-1/2 (165) 2-1/4 (57)

Assembly Number

431

442

428

440

inches 7-7/8 12-1/4 12-1/4 (mm) (200) (311) (311) lbf 84,000 160,000 160,000 (N) (373,600) (711,700) (711,700) lbf 362,000 755,000 755,000 (N) (1,610,300) (3,358,400) (3,358,400) lbf-ft 11,500 37,500 37,500 (N-m) (15,500) (50,800) (50,800) inches 19 22 22 (mm) (470) (546) (546) lbf 40,000 90,000 90,000 (N) (177,900) (400,300) (400,300) lbf 55,000 140,000 140,000 (N) (244,600) (622,700) (622,700) lbf 18,000 40,500 40,500 (N) (80,000) (180,100) (180,100) lbf 27,000 63,000 63,000 (N) (120,100) (280,200) (280,200) in² 6.5 9.6 9.6 (mm²) (4,200) (6,200) (6,200) feet 19.8 22.5 22.5 (m) (6.0) (6.9) (6.9) lb 850 2,000 2,100 (kg) (390) (910) (960)

12-1/4 (311) 190,000 (845,100) 823,000 (3,660,900) 44,500 (60,300) 20 (518) 90,000 (400,300) 140,000 (622,700) 40,500 (180,100) 63,000 (280,200) 11.0 (7,100) 23.0 (7.0) 2,300 (1,100)

Maximum Recommended Hole Diameter* Maximum Jar Load [Up/Down] Tensile Yield Strength Torsional Yield Strength** Total Stroke Up Latch Setting Standard Maximum Down Latch Setting*** Standard Maximum Pump Open Area Length [Latched Position] Weight

6-3/4 (171) 2-1/2 (64)

7 (178) 2-1/2 (64)

8 (203) 2-13/16 (71)

9-1/2 (241) 3 (76)

480

411

437

12-1/4 (311) 190,000 (845,100) 1,000,000 (4,448,200) 70,000 (94,900) 20 (518) 90,000 (400,300) 140,000 (622,700) 40,500 (180,100) 63,000 (280,200) 11.0 (7,100) 23.0 (7.0) 2,500 (1,200)

17-1/2 (445) 300,000 (1,334,400) 1,000,000 (4,448,200) 73,500 (99,600) 21 (533) 95,000 (422,500) 150,000 (667,200) 42,800 (190,300) 67,500 (300,200) 14.2 (9,170) 22.5 (6.9) 3,100 (1,500)

26 (660) 350,000 (1,556,800) 1,225,000 (5,449,100) 95,000 (128,800) 21 (533) 100,000 (444,800) 155,000 (689,400) 45,000 (200,100) 69,800 (310,400) 15.9 (10,260) 23.0 (7.0) 5,200 (2,400)

*  Hole openers not recommend ** Torsional Yeild Strength rating is based on the yeild of the body connections independent of tool joint connections *** Down Latch Setting is 45% of the Up Latch Setting and a tolerance of -+5

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PowerStroke Drilling Jar The DrillTough Powerstroke Drilling Jar has raised the industry standard for drilling jars. The PowerStroke is a double acting hydraulic jar with infinitely variable trip loads up to the maximum rating of the tool. Only a minimal load is required in both the up and down jarring directions, which is crucial when drilling directional, horizontal, and extended reach wellbores. Every aspect of its rugged design is engineered to withstand the rigors and long hours of today’s demanding drilling and fishing operations. The DrillTough PowerStroke has an extra long stroke to allow the operator to deliver exceptional impact and impulse forces during jarring operations. Both the up and down impact surfaces are located internally to the PowerStroke, and by isolating them from the wellbore fluid provides reliable and consistent operation. The NOV Downhole DrillTough PowerStroke will satisfy all of your demanding drilling jar requirements, providing control, power, and flexibility for extended drilling periods.

Features

Benefits



Hydraulic delay upstroke and downstroke jar



Driller control - infinitely variable impact intensity



Patented, self cleaning seal cone metering system



Continuous and consistent jarring performance



Exceptional tensile and torsional strength ratings



Creates superior jarring forces



BHA placement – tension or compression



Ideal for directional, horizontal, and extended reach drilling

Large inner diameter



Low pressure drop through the tool allows for high flowrates



PowerStroke Drilling Jars Outside Diameter Inside Diameter

inches (mm) inches (mm)

3-1/8 (79) 1-1/4 (32)

3-3/8 (86) 1-1/2 (38)

4-3/4 (121) 2-1/4 (57)

6-1/4 (159) 2-3/4 (70)

6-1/2 (165) 2-3/4 (70)

6-3/4 (171) 2-3/4 (70)

7 (178) 2-3/4 (70)

7-3/4 (197) 3-1/16 (78)

8 (203) 3-1/16 (78)

9-1/2 (241) 3-1/16 (78)

Assembly Number

503734

504413

156353

155790

155790

503348

503348

156426

156426

504398

Maximum Jar Load lbf 50,000 50,000 90,000 170,000 170,000 230,000 230,000 300,000 300,000 550,000 [Up/Down] (N) (222,400) (222,400) (400,300) (756,100) (756,100) (1,023,000) (1,023,000) (1,334,400) (1,334,400) (2,446,500) Tensile Yield Strength lbf 240,000 250,000 482,000 848,000 848,000 1,237,000 1,237,000 1,472,000 1,472,000 2,550,000 (N) (1,067,500) (1,112,000) (2,144,000) (3,772,000) (3,772,000) (5,502,400) (5,502,400) (6,547,700) (6,547,700) (11,342,900) Torsional Yield Strength* lbf-ft 5,700 6,300 16,200 42,000 42,000 63,300 67,800 72,800 72,800 200,000 (N-m) (7,700) (8,500) (21,900) (56,900) (56,900) (85,800) (91,900) (98,700) (98,700) (271,100) Total Stroke inches 24 24 24 28 28 28 28 30 30 30 (mm) (610) (610) (610) (711) (711) (711) (711) (762) (762) (762) Pump Open Area in² 2.8 3.7 7.1 12.2 12.2 12.2 12.2 16.8 16.8 21.1 (mm²) (1,810) (2,390) (4,590) (7,880) (7,880) (7,880) (7,880) (10,840) (10,840) (13,620) Length [Open Position] feet 30.5 30.5 30.0 32.0 32.0 32.0 32.0 33.0 33.0 33.0 (m) (9.3) (9.3) (9.1) (9.8) (9.8) (9.8) (9.8) (10.1) (10.1) (10.1) Weight lb 550 630 1,500 2,400 2,500 2,800 3,000 4,500 4,800 6,000 (kg) (250) (290) (690) (1,100) (1,200) (1,300) (1,400) (2,100) (2,200) (2,800) * Torsional Yeild Strength rating is based on the yeild of the body connections independent of tool joint connections

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RELIABILITY DRILLING JARS

Drilling Jar Placement Program The NOV Downhole Windows-based jar placement program determines the optimum jar placement in the drillstring, as well as the effects of hole angle, hole curvature, and frictional drag. This successful field proven placement program is suitable for straight, directional, and horizontal hole analysis. The effectiveness of jarring depends not only on the jar design, but also on;

Placement of the jar in the drillstring



Drillstring design



Hole conditions

The difference in jar performance between proper and improper placement can be a factor of as much of 4. Because the analysis of the mechanics of jarring is complex, a computer program is needed to precisely determine optimum jar placement.

Stress Wave Theory The energy for jarring comes from the spring effect of the drillstring when it is either stretched or compressed. When the jar trips, the sudden release of energy does not instantaneously go to the stuck point. Rather, the energy is transmitted by stress waves that travel at the speed of sound in metal.

The Impact Impulse Factor To be effective, the jarring force (impact load) must exceed the sticking force. How far the stuck object moves depends on the duration of the impact load. The combined effect of impact load and duration is called impulse. Optimum jar placement occurs with the largest impulse for an impact load greater than the sticking force.

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