Sidewall core gun

Details Sidewall core gun Sidewall core gun

E - Fixed Constructions

21

B

166/8

E21B 49/04 (2006.01)

Patent

CA 1224407

ABSTRACT OF THE DISCLOSURE 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 sun 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.

471869

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