Assignee
NAT OILWELL LP
US·41 granted patents·7 pending applications·1,292 citations·filing 1995–2007
Top patents by PatentIndex Score
48 records- 0196US7249639B2Automated arm for positioning of drilling tools such as an iron roughneckNAT OILWELL LP·Filed 2006·Granted Jul 31, 2007·68 cites·4 claims
- 0293US7178612B2Automated arm for positioning of drilling tools such as an iron roughneckNAT OILWELL LP·Filed 2004·Granted Feb 20, 2007·90 cites·48 claims
- 0393US6971283B2Jaw insert for gripping a cylindrical member and method of manufactureNAT OILWELL LP·Filed 2003·Granted Dec 6, 2005·49 cites·20 claims
- 0491US7455128B2Automated arm for positioning of drilling tools such as an iron roughneckNAT OILWELL LP·Filed 2007·Granted Nov 25, 2008·33 cites·16 claims
- 0590US6634436B1Mobile land drilling apparatus and methodNAT OILWELL LP·Filed 2000·Granted Oct 21, 2003·117 cites·31 claims
- 0688US7246983B2Pipe racking systemNAT OILWELL LP·Filed 2005·Granted Jul 24, 2007·62 cites·38 claims
- 0788US7185881B2Electric winchNAT OILWELL LP·Filed 2005·Granted Mar 6, 2007·38 cites·20 claims
- 0884US7293607B2Automated system for positioning and supporting the work platform of a mobile workover and well-servicing rigNAT OILWELL LP·Filed 2005·Granted Nov 13, 2007·30 cites·89 claims
- 0983US7228919B2Pivoting pipe handler for off-line make up of drill pipe jointsNAT OILWELL LP·Filed 2005·Granted Jun 12, 2007·45 cites·50 claims
- 1081US7523694B2Cylinder liner preload systemNAT OILWELL LP·Filed 2005·Granted Apr 28, 2009·9 cites·20 claims
- 1181US7000502B2Drillpipe spinnerNAT OILWELL LP·Filed 2004·Granted Feb 21, 2006·56 cites·31 claims
- 1280US7231981B2Inline compensator for a floating drill rigNAT OILWELL LP·Filed 2004·Granted Jun 19, 2007·61 cites·72 claims
- 1378US6923254B2Washpipe apparatusNAT OILWELL LP·Filed 2003·Granted Aug 2, 2005·38 cites·17 claims
- 1477US6386516B1Sheave block with retractable sheave guardsNAT OILWELL LP·Filed 1998·Granted May 14, 2002·48 cites·69 claims
- 1576US7765749B2Fast moving drilling rigNAT OILWELL LP·Filed 2004·Granted Aug 3, 2010·62 cites·26 claims
- 1676US7546869B2Automated system for positioning and supporting the work platform of a mobile workover and well-servicing rigNAT OILWELL LP·Filed 2007·Granted Jun 16, 2009·8 cites·34 claims
- 1775US5960700AReplaceable mud pump piston sealNAT OILWELL LP·Filed 1998·Granted Oct 5, 1999·45 cites·20 claims
- 1874US8006751B2Automated system for positioning and supporting the work platform of a mobile workover and well-servicing rigNAT OILWELL LP·Filed 2007·Granted Aug 30, 2011·16 cites·23 claims
- 1974US7121166B2Power tong assemblyNAT OILWELL LP·Filed 2004·Granted Oct 17, 2006·48 cites·6 claims
- 2074US6554523B2Hydraulic rod connector systemNAT OILWELL LP·Filed 2001·Granted Apr 29, 2003·16 cites·8 claims
- 2174US5599497AAlloy steel roll caster shellNAT OILWELL LP·Filed 1995·Granted Feb 4, 1997·16 cites·9 claims
- 2273US6588318B2Hydraulic retention system for reciprocating pump cylinder linerNAT OILWELL LP·Filed 2001·Granted Jul 8, 2003·20 cites·19 claims
- 2373US6536467B2Valve with increased inlet flowNAT OILWELL LP·Filed 2000·Granted Mar 25, 2003·21 cites·5 claims
- 2470US7234896B2Vertically folding service arm for a movable platform offshore drilling or servicing rigNAT OILWELL LP·Filed 2005·Granted Jun 26, 2007·14 cites·37 claims
- 2568US7040411B2BOP handling systemNAT OILWELL LP·Filed 2004·Granted May 9, 2006·42 cites·24 claims
- 2667US7132127B2Centrifugal applicatorNAT OILWELL LP·Filed 2003·Granted Nov 7, 2006·12 cites·14 claims
- 2767US6227240B1Unitized spherical profile check valve with replaceable sealing elementNAT OILWELL LP·Filed 1999·Granted May 8, 2001·30 cites·24 claims
- 2863US6910402B2Pipe spinnerNAT OILWELL LP·Filed 2003·Granted Jun 28, 2005·28 cites·17 claims
- 2961US7828533B2Positive displacement motor/progressive cavity pumpNAT OILWELL LP·Filed 2007·Granted Nov 9, 2010·5 cites·22 claims
- 3061US6681858B2Packer retrieverNAT OILWELL LP·Filed 2002·Granted Jan 27, 2004·25 cites·24 claims
- 3157US7461700B2Apparatus and method for a C-plate used in a cable guided fishing assemblyNAT OILWELL LP·Filed 2005·Granted Dec 9, 2008·7 cites·48 claims
- 3255US6182945B1Redundant drawworksNAT OILWELL LP·Filed 1997·Granted Feb 6, 2001·42 cites·6 claims
- 3351US7155873B2Structural connector for a drilling rig substructureNAT OILWELL LP·Filed 2004·Granted Jan 2, 2007·16 cites·16 claims
- 3450US2006202150A1Valve assembly with angled valve guideNAT OILWELL LP·Filed 2006·Application pending·0 cites
- 3549US7293618B2Power slip for drillpipeNAT OILWELL LP·Filed 2004·Granted Nov 13, 2007·10 cites·30 claims
- 3648US7137586B2Hydraulic spoolerNAT OILWELL LP·Filed 2005·Granted Nov 21, 2006·6 cites·13 claims
- 3747US7345396B2Metallic laminations for magnetic circuitsNAT OILWELL LP·Filed 2005·Granted Mar 18, 2008·3 cites·11 claims
- 3844US7066251B2Hydraulic jar lockNAT OILWELL LP·Filed 2003·Granted Jun 27, 2006·11 cites·30 claims
- 3944US2004051326A1Cam operated jaw force intensifier for gripping a cylindrical memberNAT OILWELL LP·Filed 2003·Application pending·0 cites
- 4042US7111676B2Pipe centering deviceNAT OILWELL LP·Filed 2004·Granted Sep 26, 2006·7 cites·18 claims
- 4141US6571667B2Manual tong safety latchNAT OILWELL LP·Filed 2000·Granted Jun 3, 2003·15 cites·38 claims
- 4239US7296640B2Solids control systemNAT OILWELL LP·Filed 2004·Granted Nov 20, 2007·14 cites·23 claims
- 4338US2007074460A1Portable drilling mast structureNAT OILWELL LP·Filed 2006·Application pending·0 cites
- 4434US2007011984A1Structural connector for a drilling rig substructureNAT OILWELL LP·Filed 2006·Application pending·0 cites
- 4532US6327940B1Multi-piece manual tong safety handleNAT OILWELL LP·Filed 2000·Granted Dec 11, 2001·9 cites·31 claims
- 4632US2005207272A1Mud tank with pressurized compartmentNAT OILWELL LP·Filed 2004·Application pending·0 cites
- 4732US2005050988A1Fabricated eccentric shaftNAT OILWELL LP·Filed 2003·Application pending·0 cites
- 4831US2005245381A1Centrifuge accelerator systemNAT OILWELL LP·Filed 2004·Application pending·0 cites
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