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.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →