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产品名称:The character of Back-off Joint
1. High structural strength,
2. Stable performance,
3. Pull up string to original hanging weight, positive rotate string 15-20 circles, then pull up and fishing the string above the safety joint.

No.

Spec.

OD/mm

ID/mm

Connection Thread

Fishing Thread

Remarks

1

DKJ-89

89

60

2 7/8TBG

2 7/8TBG

 

2

DKJ-108

108

75

3 1/2TBG

3 1/2TBG

 

3

DKJ-121

121

88

4TBG

3 1/2TBG

 

 

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