RELEASING BACK OFF SPEAR
Releasing back off spear is used for fishing, back off and releasing the fish. It can catch fish and at the same time transmit left hand torque in back off operation. It can instead of left-hand taper taps and die collars. The function is similar to back off sub. The difference is that it does not need to make up thread with the fish, it can catchat any parts of the fish’s ID.
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