Retrievable inside blowout preventer valve apparatus

Details Retrievable inside blowout preventer valve apparatus Retrievable inside blowout preventer valve apparatus

1982-10-12

1984-10-23

Novosad, Stephen J.

Wells

Packers or plugs

With expanding anchor

166133, 166136, 166325, E21B 33128, E21B 3406

Patent

active

044782799

ABSTRACT:
A retrievable inside blowout preventer valve apparatus for use in blocking undesired upwardly flow in the bore of a rotary drill string during well drilling operations is disclosed. The valve apparatus is installed and retrieved from a subsurface receiver sub connected in the drill string by movement through the bore of the drill string. When shutting off upwardly flow through the bore of the drill string, the valve automatically operably secures and seals itself in the receiver sub. A wireline retrieving tool is used to release the valve apparatus from the receiver sub and to establish a connection therebetween for retrieving the valve apparatus with the wireline.

REFERENCES:
patent: 2139983 (1938-12-01), Stone
patent: 2144850 (1939-01-01), Otis
patent: 2640546 (1953-06-01), Baker
patent: 2644527 (1953-07-01), Baker
patent: 2859826 (1958-11-01), Eckel
patent: 3065794 (1962-11-01), Page
patent: 3670815 (1972-06-01), Brown

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