API standard oilfield fishing tools releasing back off spear

Releasing back off spear is used for fishing, back off and releasing the fish. It can catch and transmit left hand torque during back off. It can instead of left hand taper taps and die collars. The function is similar to back off sub.The difference is that it doesn’t need to make up thread with fish and catch at any part internally.

Specification

Model

Size

Fishing ID

mm(inch)

Tensile

Load

(KN)

Initial Puling Force and Relevant Torque

Conn. 

Pulling Force

(KN)

Torque

N·M

DLM-T60

2 3/8

50.8(2)

330

147

4313

2 7/8REG

DLM-T73

2 7/8

69.9(2 3/4)

500

166

5799

NC31

DLM-T114

4 1/2

101.6(4)

850

196

11522

4 1/2REG

DLM-T140

5 1/2

125.7(4 61/64)

880

196

13263

NC50