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Excellence. Integrity. Leadership. ‘PD’ DOUBLE ACTING, HYDRAULIC-MECHANICAL DRILLING JAR MANUAL

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Page 1: ‘PD’ D A H -M D J MANUAL - Knight Oil Tools - People Make ... drilling jar...advantages over conventional hydraulic or mechanical Drilling Jars. •Hydraulic time delay allows

Excellence. Integrity. Leadership.

‘PD’ DOUBLE ACTING, HYDRAULIC-MECHANICAL

DRILLING JAR

MANUAL

Page 2: ‘PD’ D A H -M D J MANUAL - Knight Oil Tools - People Make ... drilling jar...advantages over conventional hydraulic or mechanical Drilling Jars. •Hydraulic time delay allows

Email: [email protected] Website: www.knightoiltools.com

Knight Manufacturing, LLC Phone: 1.337.233.0464

‘PD’ DOUBLE ACTING HYDRAULIC-MECHANICAL DRILLING JAR

Description

A Double Acting Hydraulic-Mechanical Drilling Jar installed in the drilling string is immediately available to apply jarring action and release the stuck portion of the drilling string.

The ‘PD’ Double Acting Hydraulic-Mechanical Drilling Jar is designed for use during drilling operations to apply an intensified force either up or down against a stuck portion of the drilling string.

The force or over pull required to free a stuck drill string must be applied in addition to the load already supported by the drilling rig and the drill pipe. This combination force often exceeds the safe tensile strength of the drill pipe, and sometimes the hoisting capacity of the drilling rig. This usually results in a costly and time consuming fishing operation.

The ‘PD’ Double Acting Hydraulic-Mechanical Drilling Jar was developed to incorporate the features of both hydraulic and mechanical Drilling Jars. Its unique design combines both hydraulic time delay release and a mechanical lock mechanism, in one relatively short, Double Acting Drilling Jar. This tool provides several distinct advantages over conventional hydraulic or mechanical Drilling Jars.

•Hydraulic time delay allows the operator to vary the over pull applied, then apply the draw-works drum brake. The jarring force is therefore easily controlled and damage to the hoisting equipment is prevented.

•Mechanical lock mechanism prevents jar movement during normal drilling operations, eliminating unnecessary wear of internal components.

•Location in BHA is less restricted. Jar can be used in tension or compression within the limits of the lock setting.

•No safety collars or special handling procedures are required on the rig floor.

•Will not fire unexpectedly when drilling or tripping in or out of the hole.

•The lock mechanism re-sets automatically, locking the jar in the neutral position.

•Linear action lock mechanism is not affected by torque.

Double acting, jarring action in both up and down directions.

To jar up, tension is applied to the jar stretching the drill string. When the jar releases, the energy stored in the stretched drill string accelerates the jar mandrel rapidly to its fully extended position. The sudden stop of the jar mandrel converts the kinetic energy of the moving mass of the drill collars into and intense impact or jarring force. This impact force will vary depending on the actual operating conditions, but can reach eight times the initial over pull.

The jar down, weight is slacked of until the force applied to the jar exceeds the mechanical down lock setting. The lock will then release, allowing the drill string to drop free. When the jar reaches its fully closed position, an intense impact force is applied to the stuck portion of the drilling string.

Page 3: ‘PD’ D A H -M D J MANUAL - Knight Oil Tools - People Make ... drilling jar...advantages over conventional hydraulic or mechanical Drilling Jars. •Hydraulic time delay allows

Email: [email protected] Website: www.knightoiltools.com

Knight Manufacturing, LLC Phone: 1.337.233.0464

‘PD’ DOUBLE ACTING HYDRAULIC-MECHANICAL DRILLING JAR

Description (Continued)

The jar down, weight is slacked of until the force applied to the jar exceeds the mechanical down lock setting. The lock will then release, allowing the drill string to drop free. When the jar reaches its fully closed position, an intense impact force is applied to the stuck portion of the drilling string.

Operations

The ‘PD’ Double Acting, Hydraulic-Mechanical Drilling Jar must be installed in the drill string with the mandrel end up. Prior to make up a suitable thread compound meeting A.P.I Spec. 7, Appendix “F” should be applied to the end connection.

Protect the mandrel sealing surface from possible damage during handling or storage. Never apply tongs, slips, chains or slings to this area.

Rig tongs should be applied immediately adjacent to the top and bottom connections to avoid breaking or torqueing the jar body connections. All body connections are torqued to specification at the service center. Avoid breaking these connections at the rig.

The up and down lock release are marked on the jar before shipment. These settings should be recorded before the tool is run into the hole.

The ‘PD’ double Acting Hydraulic-Mechanical Drilling Jar is operated by a simple up and down motion of the drill string. The intensity of the up-jarring force is directly proportional to applied tension. In the up-jarring mode, as the applied tension exceeds the lock setting, the mechanical lock releases and the hydraulic delay sequence begins. After a brief time delay, the jar mandrel is suddenly released and accelerates to the fully extended position.

In the down-jarring mode as the compression force applied to the jar exceeds the down-lock setting, the

mechanical lock releases immediately allowing the jar mandrel to move freely to the fully closed position.

Placement

Determining the ideal jar position in the bottom hole assembly, is a complex issue, where several factors must be

considered. Some of these factors are:

• Anticipating type of sticking; differential or mechanical.

• Hole condition. trajectory and inclination.

• Configuration of bottom hole assembly

• Pump pressure

• Buoyancy factor of the drilling fluid.

• Planned range of weight on bit.

• Overpull availability.

• Safe working strength of the drill pipe

• Lock setting on the jar.

Page 4: ‘PD’ D A H -M D J MANUAL - Knight Oil Tools - People Make ... drilling jar...advantages over conventional hydraulic or mechanical Drilling Jars. •Hydraulic time delay allows

Email: [email protected] Website: www.knightoiltools.com

Knight Manufacturing, LLC Phone: 1.337.233.0464

‘PD’ DOUBLE ACTING HYDRAULIC-MECHANICAL DRILLING JAR

Placement (Continued)

Although each situation and combination of factors is unique, there are some general guidelines that can be used to select the location of the jar:

• In zones where differential sticking is anticipated, locate the jar relatively high in the BHA, to minimize the chance of becoming stuck above the jar.

• Where mechanical sticking is more common, the jar may be located lower in the BHA, for increase jarring efficiency.

• Axial forces acting on the ‘PD’ Double Acting Hydraulic-Mechanical Drilling Jar while drilling should not exceed 50% of the lock settings. This will provide an adequate safety factor for normal load variations.

• For maximum jarring efficiency, the ’PD’ Double Acting Hydraulic-Mechanical Drilling Jar should be located as close as possible above the anticipated stuck point, but at least two drill collar lengths above the top stabilizer. This usually locates the jar below the neutral point in the bottom hole assembly and therefore places the jar in compression.

• A sufficient number of drill collars and / or heavy weight drill pipe should be run above the jar, to provide the necessary mass to jar down.

• To avoid becoming stuck above the jar the drill string above must not exceed the jar diameter.

• Avoid locating the ‘PD’ Double Acting Hydraulic-Mechanical Drilling Jar at a cross over between BHA components of different diameters such as drill collars and heavy weight drill pipe. The jar should be placed a minimum of two joints above or below a crossover. Although the drilling jar should be placed as close as possible above the anticipated stuck point, the jar should never be placed immediately above the top stabilizer.

Whipping of the drill collars could create sever bending stresses on the jar if placed at this location. A minimum of two drill collar lengths should be placed between the jar and top stabilizer to:

• Minimize bending stresses in jar.

• Minimize the risk of becoming stuck above the jar in sloughing formations

• Provide a clear target for string shot if required.

Page 5: ‘PD’ D A H -M D J MANUAL - Knight Oil Tools - People Make ... drilling jar...advantages over conventional hydraulic or mechanical Drilling Jars. •Hydraulic time delay allows

Email: [email protected] Website: www.knightoiltools.com

Knight Manufacturing, LLC Phone: 1.337.233.0464

‘PD’ DOUBLE ACTING HYDRAULIC-MECHANICAL DRILLING JAR

Jarring

Mechanical Lock Settings

The lock release force is adjusted to suit normal drilling requirements, at the time of assembly. On request, these settings can be changed for special applications.

To prevent the jar from releasing accidentally, the total force acting on the jar must be less than the lock settings.

Pump Open Force

If circulation is maintained while jarring, the pressure drop across the bit creates a force tending to extend the jar. The pump open force must be considered in the following calculations since it reduces the force required to jar up and increases the force required to jar down. The pump open force is calculated by multiplying the pressure drop across the bit by the pump open area.

EXAMPLE: 6 1/2” Jar with 1000 psi Bit Pressure Drop

Pump Open Force = 19.64 in. sq. x 1,000 psi = 19,640 Pound Force

Wall Drag

Additional force may be required to compensate for wall drag, especially in deviated holes. The amount of compensation should be determined from the weigh indicator readings during tripping before the drill string became stuck.

Free String Weight

The free string weight is the weight of string above the jar. To determine the free string weight subtracts the weight below the jar from the total string weight.

Jarring Up

The force applied to the following to the above free string weight, must be greater than the up latch setting, but less than the recommended maximum load during hydraulic delay. To determine the overpull above the free string weight, subtract the pump open force from the up latch setting.

Page 6: ‘PD’ D A H -M D J MANUAL - Knight Oil Tools - People Make ... drilling jar...advantages over conventional hydraulic or mechanical Drilling Jars. •Hydraulic time delay allows

Email: [email protected] Website: www.knightoiltools.com

Knight Manufacturing, LLC Phone: 1.337.233.0464

‘PD’ DOUBLE ACTING HYDRAULIC-MECHANICAL DRILLING JAR

Jarring Down

To determine the slack off required from the free string weight add the pump open force to the down latch setting.

EXAMPLE: 6 1/2” Jar with 1,000 PSI Bit Pressure Drop

Imperial Units

Up Lock Setting 70,000lb

Maximum Load During Hydraulic Delay 180,000lb

Pump Open Force 19,640 lb

Minimum Overpull Required 70,000 -19,640

Maximum Recommended Overpull 180,000 – 19,640

160,360lb

To jar upward, apply the calculated overpull and set the draw-works brake. The mechanical latch will release and the delay sequence will begin. After the time delay of approximately 30 seconds, the jar will fire.

Lower the drill string until the weight indicator reads less than the free string weight indicating that the latch has re-engaged. The jar is ready for another jarring cycle or to resume normal drilling operations.

Jarring Up (Continued)

EXAMPLE: 6 1/2” Jar with 1,000PSI Bit Pressure Drop

Imperial Units

Down Lock Setting 29,000lb

Pump Open Force 19,640 lb

Slack off from the free string weight 29,000 + 19,640

48,640lb

Page 7: ‘PD’ D A H -M D J MANUAL - Knight Oil Tools - People Make ... drilling jar...advantages over conventional hydraulic or mechanical Drilling Jars. •Hydraulic time delay allows

Email: [email protected] Website: www.knightoiltools.com

Knight Manufacturing, LLC Phone: 1.337.233.0464

‘PD’ DOUBLE ACTING HYDRAULIC-MECHANICAL DRILLING JAR

Jarring Down (Continued)

To jar downward lower the drilling string until the calculated weight is slacked off, at which point the mechanical latch is released. To re-latch the jar raise the drilling string until the weight indicator shows an increase above free string weight. This indicates the latch has re-engaged and that the jar is ready for another jarring cycle.

Inspection

On each round trip the jar should be visually inspected fro any indication of damage, excessive wear or leakage. When the jar is first removed from the hole a small quantity of drilling fluid may be noticed draining from the balancing ports. This condition is normal and does not indicate a problem.

Maintenance & Storage

New tools are shipped painted. The threaded ends are treated with iron-phosphate and coated with rust preventative coating. Heavy duty thread protectors are installed to eliminate mechanical damage.

When the jar is to be laid down the following should be done:

1. Flush all drilling fluid from the bore and from the balancing chamber with fresh water.

2. Wash external surfaces of the tool

3. Apply thread compound and protectors to the end connections.

Tools stored horizontally should be rotated to a new position occasionally to prevent seals from setting and resultant fluid leakage.

Page 8: ‘PD’ D A H -M D J MANUAL - Knight Oil Tools - People Make ... drilling jar...advantages over conventional hydraulic or mechanical Drilling Jars. •Hydraulic time delay allows

Email: [email protected] Website: www.knightoiltools.com

Knight Manufacturing, LLC Phone: 1.337.233.0464

9 1/2" PD Double Acting Hydraulic / Mechanical Drilling Jar

Item Description Qty Part No.

1 Upper connector 1 JH9161

2 Drive Mandrel 1 JH9010

3 Female Spline 1 JH9030

4 Knocker housing 1 JH9040

5 Lock housing 1 JH9070

6 Pressure Chamber 1 JH9080

7 Balance Housing 1 JH91090

8 Lower Connector 1 JH9100

9 Hydraulic Mandrel 1 JH9110

10 Lock Mandrel 1 JH9120

11 Spline Bearing 1 MT9190

12 Knocker 1 MT9200

13 Pressure Piston 2 MT9220

14 Valve Spacer 1 MT9260

15 Valve 2 MT9251

16 Jet. Jeva. UP 1 JET 547D

17 Jet. Jeva. DOWN 1 JET 280D

18 Safety Screen 2 JF0505-80

19 Jet Retainer Screw 2 GS63F38-125

20 By-Pass Ring 2 MT9270

21 Retaining Collar 1 MT9280

22 Lock Segments (Set) 1 MT9300

23 Spring Pin. 18 SP3 - 38

24 Taper Ring 2 MT9310

25 Pre Load Ring 1 MT9320

26 Retainer Nut 1 MT9340

27 Retaining Bolt. 3 SB31F38-550

28 Pre Load Spring 3 C-5512880

29 Belleville Springs 12 189-135-16-20

30 Male Adjuster 1 MT9350

31 Female Adjuster 1 MT9360

32 Setting Screw. 2 GS25C38

33 Balance Piston 1 MT9370

34 Fill Plugs 6 GS50F50-110K

35 Seal Kit 1 PDJ95-SLK

9 1/2" PD Double Acting Hydraulic / Mechanical Drilling Jar

Item Description Qty Part No.

9-1/2” ‘PD’ DOUBLE ACTING HYDRAULIC-MECHANICAL DRILLING JAR

Page 9: ‘PD’ D A H -M D J MANUAL - Knight Oil Tools - People Make ... drilling jar...advantages over conventional hydraulic or mechanical Drilling Jars. •Hydraulic time delay allows

Email: [email protected] Website: www.knightoiltools.com

Knight Manufacturing, LLC Phone: 1.337.233.0464

8” ‘PD’ DOUBLE ACTING HYDRAULIC-MECHANICAL DRILLING JAR

8" PD Double Acting Hydraulic / Mechanical Drilling Jar

Item Description Qty Part No.

1 Upper connector 1 JH8162

2 Drive Mandrel 1 JH8011

3 Female Spline 1 JH8030

4 Knocker housing 1 JH8040

5 Lock housing 1 JH8070

6 Pressure Chamber 1 JH8080

7 Balance Housing 1 JH81090

8 Lower Connector 1 JH8101

9 Hydraulic Mandrel 1 JH8110

10 Lock Mandrel 1 JH8120

11 Spline Bearing 1 MT8190

12 Knocker 1 MT8200

13 Pressure Piston 2 MT8221

14 Valve Spacer 1 MT8260

15 Valve 2 MT8251

16 Jet. Jeva. UP 1 JET 769D

17 Jet. Jeva. DOWN 1 JET 408D

Item Description Qty Part No.

18 Safety Screen 2 JF0505-80

19 Jet Retainer Screw 2 GS63F38-125

20 By-Pass Ring 2 MT8270

21 Retaining Collar 1 8281

22 Lock Segments (Set) 1 8300

23 Spring Pin. 18 SP3 - 34

24 Taper Ring 2 8311

25 Pre Load Ring 1 8341

26 Retainer Nut 1 MT8340

27 Retaining Bolt. 3 SB31F38-550

28 Pre Load Spring 3 C-5512880

29 Belleville Springs 14 159-112-13-16

30 Male Adjuster 1 8352

31 Female Adjuster 1 8361

32 Setting Screw. 2 GS25C38

33 Balance Piston 1 MT8370

34 Fill Plugs 6 GS50F50-110K

35 Seal Kit 1 PDJ80-SLK

8" PD Double Acting Hydraulic / Mechanical Drilling Jar

Page 10: ‘PD’ D A H -M D J MANUAL - Knight Oil Tools - People Make ... drilling jar...advantages over conventional hydraulic or mechanical Drilling Jars. •Hydraulic time delay allows

Email: [email protected] Website: www.knightoiltools.com

Knight Manufacturing, LLC Phone: 1.337.233.0464

6-3/4” ‘PD’ DOUBLE ACTING HYDRAULIC-MECHANICAL DRILLING JAR

6 3/4" PD Double Acting Hydraulic / Mechanical Drilling Jar

Item Description Qty Part No.

1 Upper connector 1 JH61161

2 Drive Mandrel 1 JH6011

3 Female Spline 1 JH6030

4 Knocker housing 1 JH6040

5 Lock housing 1 JH6070

6 Pressure Chamber 1 JH6080

7 Balance Housing 1 JH61090

8 Lower Connector 1 JH61100

9 Hydraulic Mandrel 1 JH6111

10 Lock Mandrel 1 JH6120

11 Spline Bearing 1 MT6190

12 Knocker 1 MT6200

13 Pressure Piston 2 MT6221

14 Valve Spacer 1 MT6260

15 Valve 2 MT6251

16 Jet. Jeva. UP 1 JET 152H

17 Jet. Jeva. DOWN 1 JET 152H

Item Description Qty Part No.

18 Safety Screen 2 JF0305-80

19 Jet Retainer Screw 2 GS44F38-125

20 By-Pass Ring 2 MT6270

21 Retaining Collar 1 6281

22 Lock Segments (Set) 1 6300

23 Spring Pin. 18 SP3 - 28

24 Taper Ring 2 6311

25 Pre Load Ring 1 6341

26 Retainer Nut 1 MT6340

27 Retaining Bolt. 3 SB31F38-550

28 Pre Load Spring 3 C-5512880

29 Belleville Springs 18 129-92-9-12

30 Male Adjuster 1 6351

31 Female Adjuster 1 6361

32 Setting Screw. 2 GS25C38

33 Balance Piston 1 MT6372

34 Fill Plugs 6 GS50F50-110K

35 Seal Kit 1 PDJ65-SLK

6 3/4" PD Double Acting Hydraulic / Mechanical Drilling Jar

Page 11: ‘PD’ D A H -M D J MANUAL - Knight Oil Tools - People Make ... drilling jar...advantages over conventional hydraulic or mechanical Drilling Jars. •Hydraulic time delay allows

Email: [email protected] Website: www.knightoiltools.com

Knight Manufacturing, LLC Phone: 1.337.233.0464

4-3/4” ‘PD’ DOUBLE ACTING HYDRAULIC-MECHANICAL DRILLING JAR

4 3/4" PD Double Acting Hydraulic / Mechanical Drilling Jar

Item Description Qty Part No.

1 Upper connector 1 JH47162

2 Drive Mandrel 1 JH47012

3 Female Spline 1 JH47031

4 Knocker housing 1 JH47041

5 Lock housing 1 JH47071

6 Pressure Chamber 1 JH47081

7 Balance Housing 1 JH471090

8 Lower Connector 1 JH47102

9 Hydraulic Mandrel 1 JH47111

10 Lock Mandrel 1 JH4120

11 Spline Bearing 1 MT4190

12 Mandrel Bearing 1 MT4210

13 Pressure Piston 1 MT4220

14 Valve Spacer 1 MT4260

15 Valve 2 MT4251

16 Jet. Jeva. UP 1 JET 385H

17 Jet. Jeva. DOWN 1 JET 385H

Item Description Qty Part No.

18 Safety Screen 2 JF0305-80

19 Jet Retainer Screw 2 GS44F31-125

21 Retaining Collar 1 MT4280

22 Lock Segments (Set) 1 MT4300

23 Spring Pin. 18 SP2.5 - 24

24 Taper Ring 2 MT4310

25 Pre Load Ring 1 MT4340

26 Retainer Nut 1 MT4380

27 Retaining Bolt. 3 SB19F25-550

28 Pre Load Spring 3 C-5511940

29 Belleville Springs 18 99-74-8-10

30 Male Adjuster 1 MT4350

31 Female Adjuster 1 MT4360

32 Setting Screw. 2 GS19C31

33 Balance Piston 1 MT4372

34 Fill Plugs 6 GS38F38-110K

35 Seal Kit 1 PDJ47-SLK

4 3/4" PD Double Acting Hydraulic / Mechanical Drilling Jar

Page 12: ‘PD’ D A H -M D J MANUAL - Knight Oil Tools - People Make ... drilling jar...advantages over conventional hydraulic or mechanical Drilling Jars. •Hydraulic time delay allows

Email: [email protected] Website: www.knightoiltools.com

Knight Manufacturing, LLC Phone: 1.337.233.0464

4-1/8” ‘PD’ DOUBLE ACTING HYDRAULIC-MECHANICAL DRILLING JAR

4 1/8" PD Double Acting Hydraulic / Mechanical Drilling Jar

Item Description Qty Part No.

1 Upper connector 1 JH41160

2 Drive Mandrel 1 JH41010

3 Female Spline 1 JH41030

4 Knocker housing 1 JH41040

5 Lock housing 1 JH41070

6 Pressure Chamber 1 JH41080

7 Balance Housing 1 JH411090

8 Lower Connector 1 JH41100

9 Hydraulic Mandrel 1 JH41110

10 Lock Mandrel 1 JH41120

11 Spline Bearing 1 MT41190

13 Pressure Piston 1 MT41220

14 Valve Spacer 1 MT41260

15 Valve 2 MT41250

16 Jet. Jeva. UP 1 JET 385H

17 Jet. Jeva. DOWN 1 JET 385H

Item Description Qty Part No.

18 Safety Screen 2 JF0205-80

19 Jet Retainer Screw 2 GS38F31-125

21 Retaining Collar 1 MT41280

22 Lock Segments (Set) 1 MT41300

24 Taper Ring 2 MT41310

25 Pre Load Ring 1 MT41340

26 Fixed Piston 1 MT41380

27 Retaining Bolt. 3 SB19F25-475

28 Pre Load Spring 3 C-5511940

29 Belleville Springs 18 80-60-5-7

30 Male Adjuster 1 MT41350

31 Female Adjuster 1 MT41360

32 Setting Screw. 2 GS19C31

34 Fill Plugs 6 GS38F38-110K

35 Seal Kit 1 PDJ41-SLK

4 1/8" PD Double Acting Hydraulic / Mechanical Drilling Jar

Page 13: ‘PD’ D A H -M D J MANUAL - Knight Oil Tools - People Make ... drilling jar...advantages over conventional hydraulic or mechanical Drilling Jars. •Hydraulic time delay allows

CAPABILITY

Knight Manufacturing, LLC uses state-of-the-art equipment to manufacture downhole tools

to the highest standards, including Double Acting Hydraulic-Mechanical Drilling Jars/

Energizers, Fishing Jars/Energizers, Bumper Subs, Shock Tools, Kelly Valves and Drill stem

Subs to name a few. The company’s 52,800-ft2 Broussard, LA facility houses the latest in

CNC lathes and milling machines, and with the added benefit of our own “in house”

Engineering department, offer our own designed product lines and also the service of

QUALITY

Knight’s dedication to quality is second to none and is symbolized by the seal shown below.

This seal is a promise to ensure excellence through safety and quality; integrity through

trust and values; and leadership through accountability, innovation and technology for its

employees, customers, products and services.

Knight Manufacturing is accredited to API 5CT and 7-1, threader and API 7-1 Supply of

Kelly Valves and drill stem subs.

7-1-0520

5CT-1126

Email: [email protected] Website: www.knightoiltools.com

Knight Manufacturing, LLC Phone: 1.337.233.0464

‘PD’ DOUBLE ACTING HYDRAULIC-MECHANICAL DRILLING JAR