Perforation trigger bypass assembly and method
AssigneeTrico Industries, Inc.
InventorsDavid B. Dillon, David O'Mara
Life of this patent
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AssigneeTrico Industries, Inc.
InventorsDavid B. Dillon, David O'Mara
Estimating the term…
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).
A perforation trigger bypass apparatus for a down-hole completion assembly including a rigid, elongated tubular casing extending into a formation producing a production fluid, a tubular completion assembly positioned in said casing, a fluid line in fluid communication with said tubular completion assembly, a perforation gun assembly positioned in said casing at a down-hole location below said tubular completion assembly and capable of a controlled detonation to form a set of perforations in said casing for retrieval of said production fluid therethrough, and a pressure sensing device formed to sense a detonation pressure in fluid communication with said fluid line through said tubular completion assembly, said sensing device operably coupled to said gun assembly to trigger said detonation upon said detonation pressure surpassing a predetermined value, said bypass apparatus comprising:
A perforation trigger bypass conduit assembly for use with a down-hole completion assembly including a casing, a tubular completion assembly positioned in said casing, a pump operably supported on said tubular completion assembly, a perforation gun assembly positioned in said casing at a down-hole location remote from said tubular completion assembly, a pressure sensing device mounted proximate and coupled to trigger said perforation gun assembly, and a fluid pressure transmitting bypass conduit coupling said pump to said sensing device, said bypass conduit assembly comprising:
A perforation trigger bypass apparatus for a well assembly including a rigid, elongated tubular casing extending into a formation producing a production fluid, a bottom-hole assembly positioned in said casing, a pump assembly operably supported thereon and formed to extract said production fluid from said well assembly through said casing, a perforation gun assembly positioned in said casing at a down-hole location below said bottom-hole assembly and capable of a controlled detonation to form a set of perforations in said casing for retrieval of said production fluid therethrough, and a pressure sensing device formed to sense a detonation pressure in fluid communication with said pump assembly, said sensing device operably coupled to said gun assembly to trigger said detonation upon said detonation pressure surpassing a predetermined value, said bypass apparatus comprising:
A method of preventing discharge of a pumped fluid, from a fluid line coupled to a tubular completion, back into a formation upon perforation of a down-hole completion assembly comprising the step of:
Dependencies are inferred from the claim text.