Well blowout preventer, and packing element

Details Well blowout preventer, and packing element Well blowout preventer, and packing element

1981-06-25

1984-07-24

Schwadron, Martin P.

Valves and valve actuation

Blow-out preventers

277121, E21B 3306

Patent

active

044614489

ABSTRACT:
A well blowout preventer packer unit is characterized by long life, and induced back to front (radial) rubber feeding between metallic inserts to close on well pipe for producing a pressure gradient against the pipe which is greatest at the bottom of the packer extent engaging the pipe, and lowest at the top of the packer extent engaging the pipe.

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patent: 3323773 (1967-06-01), Walker
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patent: 3533468 (1970-10-01), Lewis
patent: 3591125 (1971-07-01), Lewis
patent: 3917293 (1975-11-01), Lewis
patent: 3958808 (1976-05-01), Lewis
patent: 4098341 (1978-07-01), Lewis
patent: 4098516 (1978-07-01), Murman
patent: 4283039 (1981-08-01), Schaeper

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