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The bumper sub type "KXJ" is a down jarring tool and is manufactured from high-strength alloy steel. The tool can engage or disengage overshot or spears, or be used as a feed-off tool in milling or cutting operations. It can be used in conjunction with an overshot or spear.

Specification Series and Performance Parameters


Type



O.D.
(Mm)



I.D.
(Mm)

 

Tool Joint
Connection
API

Max. Tensile load
(MN)

Max. Working Torque
(kN.m)



Max. Stroke
(mm)

Overall Length (Locked)
(mm)

KXJ36

95

38

NC26

0.5

4

508

1 800

KXJ40

102

32

23/8REG

0.6

5

700

1 900

KXJ44

114

38

NC31

0.8

7

440

1 500

KXJ46

121

38

NC38

0.9

8

914

1 986

KXJ62

159

51

NC50

1.5

13

1400

2 627

KXJ165

165

51

NC50

1.6

14

1400

2 633

KXJ70

178

70

NC50

1.8

15

1552

2 737

KXJ80

203

70

65/8REG

2.2

18

1600

2 901

KXJ90

229

76

75/8REG

2.5

20

1600

2 881

The lubricated bumper sub type "BXJ" is a dependable tool that is suitable for allfishing operations, especially down hole applications and deep workover operations. It is capable of producing an intensive jarring impact downward and is more effective for use in sticky or expansion formations and use in freeing key-seated or cave-in stuck tools.

Specification Series and Performance Parameters


Type

 

O.D.
(mm)

 

I.D.
(mm)



Tool Joint
Connection
API

Max. Tensile load
(MN)

Max. Working Torque
(kN.m)

 

Max. Stroke
(mm)

Overall Length Extended
(mm)

BXJ73

73

20

2 3/8TBG

0.3

3

268

1 837

BXJ89

89

28

NC26

0.4

3.5

268

1 837

BXJ95

95

32

NC26

0.5

4

266

1 837

BXJ105

105

32

NC31

0.6

5

400

2 285

BXJ108

108

32

NC31

0.7

6

400

2 285

BXJ44

114

38

2 7/8REG

0.8

7

268

1 832

BXJ46

121

38

NC38

0.9

8

405

2 285

BXJ62

159

50

NC50

1.5

13

467

2 763

BXJ70

178

70

NC50

1.8

15

470

2 952

BXJ80

203

78

6 5/8REG

2.2

18

462

2 952

The drilling bumper sub type "ZKX' mainly makes the down jarring blow operation, releasing the stuck accident such as the sticking, land filling and keyway effectively and so on. Moreover, it can be also used for fishing operation, or it can be considered as "heave compensator" during offshore drilling.

Specification Series and Performance Parameters


Type

Tool O.D.
mmin

Hole Diameter
mmin

Connection
API

Overall Stroke
mm(in)

Max. Working Load
kN(lbf)

Max. Working Torque
kN.m(lbfft)

Max. Tensile Load
kN(lbf)

ZKX46

121(4 3/4)

50(2)

NC38

508(20)

350(79000)

8(5900)

900(202000)

ZKX76

197(7 3/4)

76(3)

6 5/8REG

1520(59 7/8)

770(173000)

15(11000)

1800(404000)

ZKX90

229(9)

76(3)

7 5/8REG

1520(59 7/8)

1300(292000)

20(15000)

2200(494000)

 
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