Varco International, Inc.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B29C SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING 1124
 
  
 
B66D CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS 120
 
  
 
B67D DISPENSING, DELIVERING, OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR 141
 
  
 
E21B EARTH OR ROCK DRILLING 195
 
  
 
G01N INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES 1205

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6343515 Method and apparatus for improved measurement of tension and compression in a wirelineJan 03, 00Feb 05, 02[G01N]
6294042 Method and apparatus for lining tubulars and lined tubular assemblyMay 19, 99Sep 25, 01[B29C]
6076703 Dispensing device and container assembly comprising such deviceOct 22, 98Jun 20, 00[B67D]
6029951 Control system for drawworks operationsJul 24, 98Feb 29, 00[B66D]
5340182 Safety elevatorSep 04, 92Aug 23, 94[E21B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5174071 Lathe and grinder apparatus with two or more side-by-side arranged manipulator-interfaced dual-spindle unitsExpiredJan 25, 91Dec 29, 92[B24B]
5109340 Path planning method for mobile robotsExpiredJun 19, 90Apr 28, 92[G06F]
5039090 Thoracic weightlifting benchExpiredAug 27, 90Aug 13, 91[A63B]
4875529 Alternate forms of, side drive drillingExpiredDec 11, 87Oct 24, 89[E21B]
4856347 Method and apparatus for measuring the flow rate and velocity of a liquid in a pipelineExpiredJul 24, 87Aug 15, 89[G01F]
4791997 Pipe handling apparatus and methodExpiredJan 07, 88Dec 20, 88[E21B]
4708018 Drilling mud density probeExpiredOct 15, 86Nov 24, 87[G01N]
4694692 Drilling fluid density measurement systemExpiredJun 04, 86Sep 22, 87[G01N, E21B]
4691384 Intrinsically safe multi-drop communications linkExpiredOct 02, 85Sep 01, 87[H03H]
4610465 Structure and use of remotely releasable pile connectorsExpiredOct 19, 83Sep 09, 86[F16L]
4595343 Remote mud pump control apparatusExpiredSep 12, 84Jun 17, 86[F04B, E21B]
4572036 Power tong and jaw apparatusExpiredApr 02, 85Feb 25, 86[B25B]
4565086 Method and apparatus for detecting entrained gases in fluidsExpiredJan 20, 84Jan 21, 86[G01N]
4535852 Drill string valve actuatorExpiredDec 27, 83Aug 20, 85[F16K, E21B]
4529045 Top drive drilling unit with rotatable pipe supportExpiredMar 26, 84Jul 16, 85[E21B]
4506555 Cable tension measuring deviceExpiredOct 07, 83Mar 26, 85[G01L]
4498698 Drill rig hookExpiredApr 18, 83Feb 12, 85[B66C]
4489794 Link tilting mechanism for well rigsExpiredMay 02, 83Dec 25, 84[E21B]
4478111 Suspension of adjustable pipe spinnerExpiredAug 29, 82Oct 23, 84[B25B]
4476936 Jacking mechanism supported by a wellheadExpiredSep 15, 83Oct 16, 84[E21B]

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