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US 4,227,543 AGranted
Blowout preventer
AssigneeCameron Iron Works, Inc.
InventorLeonard E. Williams, Jr.
Life of this patent
Estimating the term…
Abstract
A ram-type blowout preventer for use in the drilling of onshore and offshore wells, having secondary plastic injection sealing means whereby, on failure of the conventional ram seal, a well closure may still be ensured for protection of human life, equipment and the environment.
Claims8
A blowout preventer, comprising
- a housing having a bore extending therethrough and opposed guideways intersecting the bore,
- a ram slidably mounted in each of said guideways,
- a packer positioned in the face of each of said rams,
- means for extending and retracting said rams to close the bore in their extended position with said packers providing a seal across the bore and to open the bore in their retracted position,
- each of said packers having a groove extending across its face transversely of said guideway,
- the grooves of the two packers forming a sealant passage when said rams are extended to closed position, and
- at least one injection fitting connecting through said housing in communication with said packer grooves when said rams are extended to a closed position, whereby a flowable sealant may be injected through said injection fitting into said sealant passage to provide a secondary seal and to assure a tight seal of said packers when said rams are extended to closed position.
4 more elements
A blowout preventer, comprising
- a housing having a bore extending therethrough and opposed guideways intersecting the bore,
- a ram slidably mounted in each of said guideways,
- a packer positioned in the face of each of said rams,
- means for extending and retracting said rams to close the bore in their extended position and to open the bore in their retracted position,
- each of said packers having a recess extending across its face transversely of said guideway,
- a resilient retainer positioned in said packer recess, having a groove extending along its face,
- the grooves of the two retainers forming a sealant passage when said rams are extended to closed position, and
- at least one injection fitting connecting through said housing in communication with said retainer grooves when said rams are extended to a closed position, whereby a flowable sealant may be injected through said injection fitting into said sealant passage to assure a tight seal of said packers when said rams are extended to closed position.
5 more elements
A blowout preventer ram packing comprising
- a resilient packer having a face adapted to seal against the face of an opposed packer and a recess extending along the face of the packer, and
- a resilient retainer positioned within the packer recess and having a face and a groove extending along its face,
- the retainer groove coacting with a groove in the retainer of an opposed packer to define a sealant passage into which sealant may be introduced to provide a secondary sealing system for assuring a pressure tight seal along the face of opposed packers in closed position.
Dependencies are inferred from the claim text.