Wireline conveyed firing mechanism for well perforating gun

Details Wireline conveyed firing mechanism for well perforating gun Wireline conveyed firing mechanism for well perforating gun

1985-06-06

1986-09-16

Leppink, James A.

Wells

Processes

Perforating, weakening, bending or separating pipe at an...

166 55, 175 456, E21B 43116

Patent

active

046116605

ABSTRACT:
A firing mechanism for a downhole perforating gun comprises two cooperating housing sections having closed end walls in abutment. The lower housing section contains a booster charge and the primer cord for firing the gun. The upper housing section contains a detonatable primer, a hammer, and a downwardly directed explosive charge positioned between the primer and the bottom end wall of the upper housing. The upper housing is secured to the lower housing by a collet latch which, if firing of the gun does not occur, can be released by the exertion of a substantial upward force on a fishing neck provided in the assemblage of the upper housing. The defective elements can then be repaired or replaced, the upper housing reinserted in the well by wireline, and latched into an operative position with respect to the lower housing to permit another attempt to fire the perforating gun.

REFERENCES:
patent: 4484639 (1984-11-01), Ayres
patent: 4491185 (1985-01-01), McClure
patent: 4515217 (1985-05-01), Stout
patent: 4526233 (1985-07-01), Stout
patent: 4544034 (1985-10-01), George

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