Automatic drop-off device for perforating guns

Details Automatic drop-off device for perforating guns Automatic drop-off device for perforating guns

E - Fixed Constructions

21

B

166/12

E21B 43/117 (2006.01) E21B 23/04 (2006.01)

Patent

CA 1303969

AUTOMATIC DROP-OFF DEVICE FOR PERFORATING GUNS Abstract A perforating gun assembly is set forth in the present disclosure. It incorporates an upper elongate body having a firing head. The body supports a lower carrier which encloses one or more shaped charges which are positioned for forming perforations into a formation of interest. The sole means by which the carrier is attached to the body utilizes an upwardly extending set of parallel collet fingers having enlargements on the end. The collet fingers are locked in position against a conforming shoulder. Locking is achieved by a pressure movable piston. The piston is forced by detonation gases from the shaped charges away from the locked position, and the collet fingers are then permitted to flex, pulling free of the conforming shoulder to enable the carrier to drop from the elongate body. WX 86.118

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