Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Annulus check valve with tubing plug back-up

Annulus check valve with tubing plug back-up

US Patent 6186237 · Granted Feb 13, 2001

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Control system for a subsea well2015
Subsea tree workover control system2014
High capacity wellhead connector having a single annular piston2013
Well unloading package2012
Detachable electrical actuator2012
Method and device for producing hydrocarbons using wireless communication2012
Large bore vertical tree2012
Through riser installation of tree block2011
Collapse arrestor tool2010
Tubing annulus communication for vertical flow subsea well2005
Production tree with multiple safety barriers2004
Tubing head control and pressure monitor device2002