Retrievable blow-out preventer ram seals

Details Retrievable blow-out preventer ram seals Retrievable blow-out preventer ram seals

1975-02-24

1977-02-15

Schwadron, Martin P.

Valves and valve actuation

Blow-out preventers

166250, 166277, E21B 3306

Patent

active

040079058

ABSTRACT:
Retrievable blowout preventer ram seals which are adapted to be removed and/or inserted with apparatus working on the inside of the well pipe.

REFERENCES:
patent: 2752119 (1956-06-01), Allen et al.
patent: 2912214 (1959-11-01), Allen et al.
patent: 3272222 (1966-09-01), Allen et al.
patent: 3561723 (1971-02-01), Cugini
patent: 3614111 (1971-10-01), Regan
patent: 3647174 (1972-03-01), LeRouax
patent: 3741296 (1973-06-01), Murman et al.
patent: 3744749 (1973-07-01), LeRouax

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