Assignee
DRILEX SYST INC
US·18 granted patents·1,701 citations·filing 1986–1995
Top patents by PatentIndex Score
18 records- 0198US4765404AWhipstock packer assemblyDRILEX SYST INC·Filed 1987·Granted Aug 23, 1988·238 cites·21 claims
- 0295US5171138AComposite stator construction for downhole drilling motorsDRILEX SYST INC·Filed 1992·Granted Dec 15, 1992·183 cites·10 claims
- 0394US4962819AMud saver valve with replaceable inner sleeveDRILEX SYST INC·Filed 1989·Granted Oct 16, 1990·171 cites·14 claims
- 0492US5704838ADown-hole motor universal jointDRILEX SYST INC·Filed 1995·Granted Jan 6, 1998·56 cites·10 claims
- 0592US5009265APacker for wellhead repair unitDRILEX SYST INC·Filed 1989·Granted Apr 23, 1991·123 cites·24 claims
- 0690US5248896APower generation from a multi-lobed drilling motorDRILEX SYST INC·Filed 1992·Granted Sep 28, 1993·82 cites·19 claims
- 0790US4909320ADetonation assembly for explosive wellhead severing systemDRILEX SYST INC·Filed 1988·Granted Mar 20, 1990·102 cites·37 claims
- 0890US4759413AMethod and apparatus for setting an underwater drilling systemDRILEX SYST INC·Filed 1987·Granted Jul 26, 1988·95 cites·20 claims
- 0987US4955949AMud saver valve with increased flow check valveDRILEX SYST INC·Filed 1989·Granted Sep 11, 1990·95 cites·20 claims
- 1085US4901806AApparatus for controlled absorption of axial and torsional forces in a well stringDRILEX SYST INC·Filed 1988·Granted Feb 20, 1990·86 cites·22 claims
- 1184US4754820ADrilling head with bayonet couplingDRILEX SYST INC·Filed 1986·Granted Jul 5, 1988·114 cites·30 claims
- 1280US4865137ADrilling apparatus and cutterDRILEX SYST INC·Filed 1988·Granted Sep 12, 1989·60 cites·14 claims
- 1379US4984636AGeothermal wellhead repair unitDRILEX SYST INC·Filed 1989·Granted Jan 15, 1991·64 cites·17 claims
- 1477US5094304ADouble bend positive positioning directional drilling systemDRILEX SYST INC·Filed 1990·Granted Mar 10, 1992·71 cites·18 claims
- 1576US5269383ANavigable downhole drilling systemDRILEX SYST INC·Filed 1992·Granted Dec 14, 1993·68 cites·22 claims
- 1661US5040600AGeothermal wellhead repair unitDRILEX SYST INC·Filed 1990·Granted Aug 20, 1991·39 cites·10 claims
- 1759US4926949AThermal shield for drilling motorsDRILEX SYST INC·Filed 1988·Granted May 22, 1990·31 cites·31 claims
- 1845US4793424ASelf-lubricating well tools and seal elements thereforDRILEX SYST INC·Filed 1987·Granted Dec 27, 1988·23 cites·19 claims
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