Assignee
VARCO INT
US220 patents
Top patents by PatentIndex Score
US7367396B2May 6, 2008
Blowout preventers and methods of use
VARCO INT96 citations99
US4765401AAug 23, 1988
Apparatus for handling well pipe
VARCO INT333 citations99
US4709766ADec 1, 1987
Well pipe handling machine
VARCO INT174 citations99
US4625796ADec 2, 1986
Well pipe stabbing and back-up apparatus
VARCO INT175 citations99
US4605077AAug 12, 1986
Top drive drilling systems
VARCO INT224 citations99
US4529045AJul 16, 1985
Top drive drilling unit with rotatable pipe support
VARCO INT187 citations99
US4449596AMay 22, 1984
Drilling of wells with top drive unit
VARCO INT335 citations99
US7424917B2Sep 16, 2008
Subsea pressure compensation system
VARCO INT59 citations98
US7216767B2May 15, 2007
Screen basket and shale shakers
VARCO INT65 citations98
US7080960B2Jul 25, 2006
Apparatus and method for transporting waste materials
VARCO INT66 citations98
US6691801B2Feb 17, 2004
Load compensator for a pipe running tool
VARCO INT173 citations98
US6510947B1Jan 28, 2003
Screens for vibratory separators
VARCO INT96 citations98
US6443241B1Sep 3, 2002
Pipe running tool
VARCO INT224 citations98
USD543833SJun 5, 2007
Support link
VARCO INT60 citations97
US6637526B2Oct 28, 2003
Offset elevator for a pipe running tool and a method of using a pipe running tool
VARCO INT148 citations97
US7520129B2Apr 21, 2009
Subsea pressure accumulator systems
VARCO INT62 citations96
US7195084B2Mar 27, 2007
Systems and methods for storing and handling drill cuttings
VARCO INT78 citations96
US7188547B1Mar 13, 2007
Tubular connect/disconnect apparatus
VARCO INT69 citations96
US7055594B1Jun 6, 2006
Pipe gripper and top drive systems
VARCO INT92 citations96
US6722504B2Apr 20, 2004
Vibratory separators and screens
VARCO INT63 citations96
US6565698B1May 20, 2003
Method for making vibratory separator screens
VARCO INT63 citations96
US6454099B1Sep 24, 2002
Vibrator separator screens
VARCO INT52 citations96
US6371301B1Apr 16, 2002
Screen basket for shale shakers
VARCO INT34 citations96
US6276450B1Aug 21, 2001
Apparatus and method for rapid replacement of upper blowout preventers
VARCO INT211 citations96
US4696207ASep 29, 1987
Well pipe handling machine
VARCO INT68 citations96
US4489794ADec 25, 1984
Link tilting mechanism for well rigs
VARCO INT119 citations96
US4458768AJul 10, 1984
Top drive well drilling apparatus
VARCO INT78 citations96
US4444421AApr 24, 1984
Driveable pile connections
VARCO INT64 citations96
US4421179ADec 20, 1983
Top drive well drilling apparatus
VARCO INT117 citations96
US4365676ADec 28, 1982
Method and apparatus for drilling laterally from a well bore
VARCO INT118 citations96
US4348920ASep 14, 1982
Well pipe connecting and disconnecting apparatus
VARCO INT105 citations96
US4023449AMay 17, 1977
Tool for connecting and disconnecting well pipe
VARCO INT118 citations96
US3961399AJun 8, 1976
Power slip unit
VARCO INT81 citations96
US7591304B2Sep 22, 2009
Pipe running tool having wireless telemetry
VARCO INT62 citations95
US7484625B2Feb 3, 2009
Shale shakers and screens with identification apparatuses
VARCO INT77 citations95
US7231969B2Jun 19, 2007
Wellbore top drive power systems and methods of use
VARCO INT52 citations95
US7188686B2Mar 13, 2007
Top drive systems
VARCO INT54 citations95
US7159654B2Jan 9, 2007
Apparatus identification systems and methods
VARCO INT176 citations95
US7100698B2Sep 5, 2006
Make-up control system for tubulars
VARCO INT67 citations95
US7096977B2Aug 29, 2006
Pipe running tool
VARCO INT66 citations95
US7051989B2May 30, 2006
Blowout preventer and movable ram block support
VARCO INT48 citations95
US7000777B2Feb 21, 2006
Vibratory separator screens
VARCO INT79 citations95
US6976540B2Dec 20, 2005
Method and apparatus for offline standbuilding
VARCO INT78 citations95
US6907375B2Jun 14, 2005
Method and apparatus for dynamic checking and reporting system health
VARCO INT83 citations95
US6725949B2Apr 27, 2004
Washpipe assembly
VARCO INT80 citations95
US6578422B2Jun 17, 2003
Ultrasonic detection of flaws in tubular members
VARCO INT118 citations95
US6029951AFeb 29, 2000
Control system for drawworks operations
VARCO INT129 citations95
US5451129ASep 19, 1995
Pipe transfer system
VARCO INT71 citations95
US7571817B2Aug 11, 2009
Automatic separator or shaker with electromagnetic vibrator apparatus
VARCO INT59 citations94
US6938709B2Sep 6, 2005
Pipe running tool
VARCO INT48 citations94
Showing the top 50 of 220 patents by PatentIndex Score.