Method and apparatus for the completion of an oil or gas well an

Details Method and apparatus for the completion of an oil or gas well an Method and apparatus for the completion of an oil or gas well an

1987-01-05

1988-01-12

Novosad, Stephen J.

Wells

Processes

Placing or shifting well part

166127, 166147, E21B 33124, E21B 33129

Patent

active

047184965

ABSTRACT:
Apparatus for isolating a formation, isolating a damaged section of casing, and for pressure testing the apparatus when located in a cased well bore. The apparatus includes a first packer that is in sealing engagement with the casing for isolating the formation, second and third packers that are spaced to span the damage to the casing, a first valve for closing the passageway through the packers, and a second valve for applying pressure between the first and second packers to test the seals formed thereby. Also provided is an improved method for isolating a damaged section of casing, isolating a formation, and pressure testing the apparatus when located in a cased well bore. The method includes extending the aforementioned apparatus into the well bore, closing the first valve to close the flow through the packers, opening a second valve, and applying pressure to test the seals of the first and second packers. The method also includes the step of applying pressure down an annulus formed between a conduit upon which the apparatus is suspended and the casing to test the seal of the upper packer.

REFERENCES:
patent: 2831541 (1958-04-01), Conover
patent: 3199598 (1965-08-01), Loomis
patent: 3455382 (1969-07-01), Chenoweth
patent: 3735814 (1973-05-01), Tucker
patent: 3987847 (1976-10-01), Craig
patent: 4081990 (1978-04-01), Chatagnier
patent: 4254832 (1981-03-01), Patton et al.
patent: 4357992 (1982-11-01), Sweeney

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