Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Annular blowout preventer

Annular blowout preventer

US Patent 4460150 · Granted Jul 17, 1984

Estimated economic value: $1,185,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Annular blowout preventer2021
Fracturing systems and methods with rams2021
Ram for a blowout preventer and a blowout preventer provided with rams2019
Blowout preventer with packer assembly and method of using same2016
Blowout preventer translating shaft locking system2013
Shearing sealing ram2007
Bidirectional sealing blowout preventer2004
Blowout preventer bonnet seal carrier1992
Variable bore packer for a ram type blowout preventer1991
Variable bore packer for a ram type blowout preventer1991
Rod locking device1990
Annular blowout preventer with upper and lower spherical sealing surfaces and ri1986