Sidewall core gun

Details Sidewall core gun Sidewall core gun

1983-12-01

1986-09-02

Leppink, James A.

Boring or penetrating the earth

Boring with explosion in inaccessible hole

Firing control mechanically actuated in bore

102531, 166 63, E21B 4902

Patent

active

046090568

ABSTRACT:
Disclosed herein is a sidewall core gun attached to the lower end of a drill string, enabling the taking of core samples from within a deviated borehole. The gun also includes an improved charge assembly, including a detonatable cord and one or more deflagratable cartridge assemblies for propelling a coring bullet from the gun to the sidewall of the borehole. Coring bullets imbedded in the sidewall remain connected to the gun via steel cables, whereby the bullets may be retrieved by raising the drill string.

REFERENCES:
patent: 2055506 (1936-09-01), Schlumberger
patent: 2336819 (1943-12-01), Turechek
patent: 3002559 (1961-10-01), Hanes
patent: 3075462 (1963-01-01), Adamson, Jr.
patent: 3227228 (1966-01-01), Bannister
patent: 3672301 (1972-06-01), Abbott
patent: 3893395 (1975-07-01), Kilmer
patent: 4339947 (1982-07-01), Wiley

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