VARCO SHAFFER, INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
 
 
E21B EARTH OR ROCK DRILLING 1482
 
 
 
C09K MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR194
 
 
 
F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR 144
 
 
 
F16D COUPLINGS FOR TRANSMITTING ROTATION 190
 
 
 
F16K VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING172

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7380589 Subsea coiled tubing injector with pressure compensationDec 09, 03Jun 03, 08[E21B]
7051814 Subsea coiled tubing injector with pressure compensated roller assemblyNov 10, 03May 30, 06[E21B]
6857634 BOP assembly with metal insertsFeb 20, 03Feb 22, 05[E21B]
6719042 Shear ram assemblyJul 08, 02Apr 13, 04[E21B]
6374925 Well drilling method and systemSep 22, 00Apr 23, 02[E21B]
6244560 Blowout preventer ram actuating mechanismMar 31, 00Jun 12, 01[E21B]
6192680 Subsea hydraulic control systemJul 15, 99Feb 27, 01[F16D]
5975484 Door connectorsJun 05, 98Nov 02, 99[E21B]
5897094 BOP with improved door connectorsDec 27, 96Apr 27, 99[E21B]
5778918 Pilot valve with improved cageOct 18, 96Jul 14, 98[F16K, F15B]

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Expired/Abandoned/Withdrawn Patents

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Top Inventors for This Owner

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