Perforation trigger bypass assembly and method

Details Perforation trigger bypass assembly and method Perforation trigger bypass assembly and method

1994-09-26

1996-04-23

Tsay, Frank S.

Wells

Processes

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

166299, 166 55, 166317, E21B 2902, E21B 2908, E21B 4311

Patent

active

055094821

ABSTRACT:
A perforation trigger bypass conduit assembly (10) for a well perforation gun (17) positioned in a well casing (12) at a down-hole location below a tubular completion assembly (16). A pressure sensing device (20) senses a detonation pressure of fluid communicated from a pump (21) through bypass conduit assembly (10) to the sensor (20). The sensing device (20) triggers the gun upon sensing a pressure surpassing a predetermined value, which perforates the casing (12). The bypass conduit assembly (10) is formed to enable blocking of the bypass conduit assembly (10) after triggering of the perforation gun (17) to prevent pumping of production and power fluid back into the formation upon severing of a portion (34) of the conduit assembly (10). Blocking can be effected by removing a member (25) which contains a passageway (51) forming part of the bypass conduit assembly (10) and replacing the removable member (25) with a passageway-free insert member (35).

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patent: 5161616 (1992-11-01), Colla
patent: 5249630 (1993-10-01), Meaders et al.
patent: 5355957 (1994-10-01), Burleson et al.

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