Remotely variable multiple bore ram system and method

Details Remotely variable multiple bore ram system and method Remotely variable multiple bore ram system and method

1987-03-16

1989-05-02

Kisliuk, Bruce M.

Wells

Processes

Repairing object in well

166 82, 166 85, 166387, 29235, 29451, 251 13, 277 95, E21B 3306, B23P 1904

Patent

active

048259489

ABSTRACT:
Method and apparatus for varying from a remote location the bore of shoes within a ram-type blow out preventer to sealingly engage pipe of varying diameters. A plurality of shoe pairs is provided, each pair defining a cylindrical surface having a different bore for engagement about pipe of corresponding diameter. Each shoe has pipe faces and a curved packer surface forming a semicircular half-cylinder portion of the cylindrical surface and is releasably and interchangeably interconnectable by a lock pin to either of a pair of rams in the preventer. Method and apparatus are further provided for effecting from a remote location removal of a first shoe pair from the preventer rams and transfer thereof to the location, as well as transfer of a second shoe pair from the location to the preventer and installation therein, thereby remotely varying the shoe bore in the preventer as desired.

REFERENCES:
patent: 2427073 (1947-09-01), Schweitzer
patent: 3272222 (1966-09-01), Allen
patent: 3554480 (1971-01-01), Rowe
patent: 3737974 (1973-06-01), Mott
patent: 3741296 (1973-06-01), Murman et al.
patent: 3821838 (1974-07-01), Mott
patent: 4003430 (1977-01-01), Carnahan
patent: 4133342 (1979-01-01), Carnahan
patent: 4398729 (1983-08-01), Bishop et al.
patent: 4541639 (1985-09-01), Williams, III

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