Combined pressure testing and selective fired perforating system

Details Combined pressure testing and selective fired perforating system Combined pressure testing and selective fired perforating system

1993-10-08

1994-10-18

Britts, Ramon S.

Wells

Processes

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

166 55, 166 63, E21B 2902

Patent

active

053559576

ABSTRACT:
A system is provided for performing multiple operations on a well in response to multiple fluid pressure increases. The system includes first and second pressure actuated firing heads and a source of actuating fluid pressure for the firing heads. A first selective communication device is provided for isolating the second firing head from the source of actuating fluid pressure until after the first firing head has been actuated and for then communicating the second firing head with the source of actuating fluid pressure in response to actuation of the first firing head. This system is particularly adapted for allowing pressure testing of a well upon a first fluid pressure increase, followed by perforation of the well upon a second fluid pressure increase.

REFERENCES:
patent: 3717095 (1973-02-01), Vann
patent: 4496010 (1985-01-01), Chapman, III
patent: 4612992 (1986-09-01), Vann et al.
patent: 4823875 (1989-04-01), Hill
patent: 4901802 (1990-02-01), George et al.
patent: 4969525 (1990-11-01), George et al.
patent: 5078210 (1992-01-01), George
patent: 5103912 (1992-04-01), Flint
patent: 5115865 (1992-05-01), Carisella et al.
patent: 5161616 (1992-11-01), Colla
patent: 5287924 (1994-02-01), Burleson et al.
Exhibit A-Undated advertising brochure admitted to be prior art illustrating the Vann Systems Time Delayed Firing Head.
Exhibit B-Undated brochure admitted to be prior art illustrating a Vann Systems Differential Firing Head.
Exhibit C-Catalog pp. 22-37 from a Gearhart Company catalog. This Reference is Undated but is Admitted to be Prior Art.

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