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MECHANICAL DRILLING JAR

TECHNICAL SUMMARY

Mechanical drilling jar is a jarring and stuck releasing tool. It integrates the up jar and down jar and can release the stuck accident to occurring during drilling operation. For directional wells and deep wells drilling, the mechanical drilling jars are an ideal tool for improving work efficiency.
Mechanical drilling jar integrates upward jarring with downward jarring so that it can release drilling tools from the block or the stuck etc. during drilling. It is a part of drill stem when it doesn't jarring and it can work at any time when need jarring, thus it is highly improve the drilling efficiency, it has widely load (jarring force) scope of upward jarring and download jarring, so it can be adjusted at the maintenance station or on the well site according to the requirement. The special flexible joint can effectively reduce the flexural stress of the drilling jar body. Therefore, it is the first selected drilling jar for vertical well, deep well, directional well and complicated well operations.

SPECIFICATION

Model

BZ121

BZ165/159

BZ203/197

OD

mm(inch)

121(4 3/4)

165(6 1/2)/159(6 1/4)

203(8)/197(7 3/4)

ID

mm(inch)

50.8(2)

57.2(2 1/4)

71.4(2 13/16)

OAL(Locking place)

mm(inch)

6370(251)

7015(276)

7310(288)

Upper Stroke

mm(inch)

210(8 1/4)

142(5 9/16)

145(5 11/16)

Lower Stroke

mm(inch)

197(7 3/4)

172(6 3/4)

178(7)

Conn.

NC38

NC50

6 5/8REG

Max Working Load

(KN)

1950

3750

6650

Max Working Torque

(KN·M

15

25

35

Upward Jarring Force

(KN)

450

630

820

Downward Jarring Force

(KN)

230

360

460

Pumping Area(cm²)

42

76

134

ASSEMBLY

1. Top sub
2. Upper control sleeve
3. Extention mandrel
4. Friction bushing
5. Middle sleeve
6. Slip
7. Moving mandrel
8. Lower control sleeve
9. Spline ody
10. Compression nut
11. Mandrel

MECHANICAL DRILLING JAR

PRODUCTS

Drilling Motors
Stabilizers
Drill Collars
Drill Pipes
Drilling Jars
Fishing Tools
Drill Bits
Subs & Valves
Mud Pump Spare Parts
Bearings
Drilling Equipment
Hydraulic Agitator