Assignee
VARCO INT
US·220 granted patents·6 pending applications·10,082 citations·filing 1974–2012
Top patents by PatentIndex Score
226 records- 0199US7424917B2Subsea pressure compensation systemVARCO INT·Filed 2005·Granted Sep 16, 2008·59 cites·11 claims
- 0299US7216767B2Screen basket and shale shakersVARCO INT·Filed 2005·Granted May 15, 2007·65 cites·16 claims
- 0399US4765401AApparatus for handling well pipeVARCO INT·Filed 1986·Granted Aug 23, 1988·333 cites·24 claims
- 0499US4449596ADrilling of wells with top drive unitVARCO INT·Filed 1982·Granted May 22, 1984·335 cites·40 claims
- 0598US7520129B2Subsea pressure accumulator systemsVARCO INT·Filed 2006·Granted Apr 21, 2009·62 cites·21 claims
- 0698US7367396B2Blowout preventers and methods of useVARCO INT·Filed 2006·Granted May 6, 2008·96 cites·17 claims
- 0798US4605077ATop drive drilling systemsVARCO INT·Filed 1984·Granted Aug 12, 1986·224 cites·12 claims
- 0897US7484625B2Shale shakers and screens with identification apparatusesVARCO INT·Filed 2005·Granted Feb 3, 2009·77 cites·10 claims
- 0997US7000777B2Vibratory separator screensVARCO INT·Filed 2003·Granted Feb 21, 2006·79 cites·16 claims
- 1097US6443241B1Pipe running toolVARCO INT·Filed 2000·Granted Sep 3, 2002·224 cites·15 claims
- 1197US4709766AWell pipe handling machineVARCO INT·Filed 1985·Granted Dec 1, 1987·174 cites·41 claims
- 1297US4625796AWell pipe stabbing and back-up apparatusVARCO INT·Filed 1985·Granted Dec 2, 1986·175 cites·35 claims
- 1397US4529045ATop drive drilling unit with rotatable pipe supportVARCO INT·Filed 1984·Granted Jul 16, 1985·187 cites·22 claims
- 1496US7159654B2Apparatus identification systems and methodsVARCO INT·Filed 2005·Granted Jan 9, 2007·176 cites·29 claims
- 1596US7080960B2Apparatus and method for transporting waste materialsVARCO INT·Filed 2002·Granted Jul 25, 2006·66 cites·25 claims
- 1696US6722504B2Vibratory separators and screensVARCO INT·Filed 2001·Granted Apr 20, 2004·63 cites·13 claims
- 1796US6565698B1Method for making vibratory separator screensVARCO INT·Filed 2000·Granted May 20, 2003·63 cites·18 claims
- 1896US4023449ATool for connecting and disconnecting well pipeVARCO INT·Filed 1976·Granted May 17, 1977·118 cites·17 claims
- 1995US7571817B2Automatic separator or shaker with electromagnetic vibrator apparatusVARCO INT·Filed 2005·Granted Aug 11, 2009·59 cites·37 claims
- 2095US7188547B1Tubular connect/disconnect apparatusVARCO INT·Filed 2006·Granted Mar 13, 2007·69 cites·20 claims
- 2195US6578422B2Ultrasonic detection of flaws in tubular membersVARCO INT·Filed 2001·Granted Jun 17, 2003·118 cites·37 claims
- 2295US6510947B1Screens for vibratory separatorsVARCO INT·Filed 2001·Granted Jan 28, 2003·96 cites·14 claims
- 2394US7540838B2Centrifuge control in response to viscosity and density parameters of drilling fluidVARCO INT·Filed 2006·Granted Jun 2, 2009·29 cites·21 claims
- 2494US7096977B2Pipe running toolVARCO INT·Filed 2005·Granted Aug 29, 2006·66 cites·19 claims
- 2594US6691801B2Load compensator for a pipe running toolVARCO INT·Filed 2001·Granted Feb 17, 2004·173 cites·26 claims
- 2694US6443310B1Seal screen structureVARCO INT·Filed 2000·Granted Sep 3, 2002·61 cites·16 claims
- 2794US6276450B1Apparatus and method for rapid replacement of upper blowout preventersVARCO INT·Filed 1999·Granted Aug 21, 2001·211 cites·20 claims
- 2894US6029951AControl system for drawworks operationsVARCO INT·Filed 1998·Granted Feb 29, 2000·129 cites·25 claims
- 2994US5451129APipe transfer systemVARCO INT·Filed 1993·Granted Sep 19, 1995·71 cites·41 claims
- 3094US4489794ALink tilting mechanism for well rigsVARCO INT·Filed 1983·Granted Dec 25, 1984·119 cites·14 claims
- 3193US7591304B2Pipe running tool having wireless telemetryVARCO INT·Filed 2005·Granted Sep 22, 2009·62 cites·13 claims
- 3293US7493969B2Drill cuttings conveyance systems and methodsVARCO INT·Filed 2005·Granted Feb 24, 2009·39 cites·18 claims
- 3393US7287544B2Triple valve blow out preventerVARCO INT·Filed 2005·Granted Oct 30, 2007·33 cites·20 claims
- 3493USD543833SSupport linkVARCO INT·Filed 2005·Granted Jun 5, 2007·60 cites·1 claims
- 3593US7198156B2Dam basket for vibratory separatorsVARCO INT·Filed 2005·Granted Apr 3, 2007·29 cites·22 claims
- 3693US6868972B2Fluid flow diffusers and vibratory separatorsVARCO INT·Filed 2002·Granted Mar 22, 2005·56 cites·25 claims
- 3793US6637526B2Offset elevator for a pipe running tool and a method of using a pipe running toolVARCO INT·Filed 2001·Granted Oct 28, 2003·148 cites·19 claims
- 3893US4421179ATop drive well drilling apparatusVARCO INT·Filed 1981·Granted Dec 20, 1983·117 cites·12 claims
- 3993US4365676AMethod and apparatus for drilling laterally from a well boreVARCO INT·Filed 1980·Granted Dec 28, 1982·118 cites·38 claims
- 4093US4320915AInternal elevatorVARCO INT·Filed 1980·Granted Mar 23, 1982·157 cites·16 claims
- 4193US3961399APower slip unitVARCO INT·Filed 1975·Granted Jun 8, 1976·81 cites·26 claims
- 4292US7699121B2Pipe running tool having a primary load pathVARCO INT·Filed 2005·Granted Apr 20, 2010·41 cites·15 claims
- 4392US7320374B2Wellbore top drive systemsVARCO INT·Filed 2005·Granted Jan 22, 2008·49 cites·14 claims
- 4492US7062991B1Tubular connect/disconnect apparatusVARCO INT·Filed 2005·Granted Jun 20, 2006·52 cites·20 claims
- 4592US6745136B2Pipe inspection systems and methodsVARCO INT·Filed 2002·Granted Jun 1, 2004·60 cites·35 claims
- 4692US6412644B1Vibratory separatorVARCO INT·Filed 2000·Granted Jul 2, 2002·40 cites·12 claims
- 4792US6371301B1Screen basket for shale shakersVARCO INT·Filed 2000·Granted Apr 16, 2002·34 cites·11 claims
- 4892US4535852ADrill string valve actuatorVARCO INT·Filed 1983·Granted Aug 20, 1985·52 cites·21 claims
- 4992US4348920AWell pipe connecting and disconnecting apparatusVARCO INT·Filed 1980·Granted Sep 14, 1982·105 cites·15 claims
- 5091US7331562B2Blowout preventer with breech assemblyVARCO INT·Filed 2005·Granted Feb 19, 2008·40 cites·20 claims
Showing the top 50 of 226 patent records by PatentIndex Score.
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