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Referenced by

Citing PatentFiling dateIssue dateOriginal AssigneeTitle
US39676782 Jun 19756 Jul 1976Dresser Industries, Inc.Stuffing box control system
US41462376 Jun 197727 Mar 1979Kommanditbolaget United Stirling (Sweden) AB & Co.Sealing device for Stirling engine piston rod in which no separation of oil and gas is necessary
US426274215 Aug 197921 Apr 1981Downhole seal for low profile oil well pumping installations
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US444023226 Jul 19823 Apr 1984Koomey, Inc.Well pressure compensation for blowout preventers
US488918416 May 198826 Dec 1989Shell Internationale ResearchPolished rod stuffing box with safety valve for a beam pumped production well
US504860329 May 199017 Sep 1991Lubricator corrosion inhibitor treatment
US53928617 Mar 199428 Feb 1995Residual pollution containment device and method of cleaning a wireline
US60068392 Oct 199628 Dec 1999Stewart & Stevenson, Inc.Pressurized flexible conduit injection system
US663751626 Nov 200128 Oct 2003High torque and high capacity rotatable center core and floatable sealed body assemblies with universal RAM applications and method
US66517463 Jul 200225 Nov 2003High torque and high capacity rotatable center core and floatable sealed body assemblies with universals ram applications and method
US676410325 Mar 200320 Jul 2004Method and apparatus for locking a tubular quick coupling
US70111603 Jul 200314 Mar 2006High torque and high capacity rotatable center core with ram body assemblies
US799733426 Jun 200816 Aug 2011Phuel Oil Tools LimitedApparatus and method