Assignee
DOUBLE E INC
US·12 granted patents·1 pending application·301 citations·filing 1980–2005
Top patents by PatentIndex Score
13 records- 0179US4907650AWellhead with safety valve for pumping wellDOUBLE E INC·Filed 1989·Granted Mar 13, 1990·62 cites·22 claims
- 0273US4844406ABlowout preventerDOUBLE E INC·Filed 1988·Granted Jul 4, 1989·46 cites·8 claims
- 0365US6223819B1Wellhead for providing structure when utilizing a well pumping systemDOUBLE E INC·Filed 1999·Granted May 1, 2001·50 cites·7 claims
- 0463US5044602ABlowout preventerDOUBLE E INC·Filed 1990·Granted Sep 3, 1991·41 cites·21 claims
- 0561US4289294AWellhead flow control devicesDOUBLE E INC·Filed 1980·Granted Sep 15, 1981·28 cites·41 claims
- 0657US5246067AWell leak catcherDOUBLE E INC·Filed 1992·Granted Sep 21, 1993·36 cites·19 claims
- 0754US7363985B2Hydraulic latch for capillary tubing stringDOUBLE E INC·Filed 2005·Granted Apr 29, 2008·4 cites·30 claims
- 0839US4286791APacking assembly for a movable shaftDOUBLE E INC·Filed 1980·Granted Sep 1, 1981·7 cites·21 claims
- 0938US5878812AMisaligning wellhead systemDOUBLE E INC·Filed 1997·Granted Mar 9, 1999·16 cites·9 claims
- 1033US6955225B2Method of and apparatus for securing capillary tubing in a wellheadDOUBLE E INC·Filed 2003·Granted Oct 18, 2005·0 cites·14 claims
- 1133US5435385AIntegrated wellhead tubing stringDOUBLE E INC·Filed 1993·Granted Jul 25, 1995·7 cites·12 claims
- 1232US2004159441A1Method of and apparatus for dual packing of capillary tubing in a wellheadDOUBLE E INC·Filed 2003·Application pending·0 cites
- 1330US4632468AGuide for well pump sucker rodDOUBLE E INC·Filed 1985·Granted Dec 30, 1986·4 cites·17 claims
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →