WEATHERFORD U.S. L.P.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
E21B EARTH OR ROCK DRILLING 1581
 
  
 
F42B EXPLOSIVE CHARGES, e.g. FOR BLASTING; FIREWORKS; AMMUNITION 138
 
  
 
G01V GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS 179

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6382333 Friction reducing tool for oilfield drilling applicationsNov 01, 99May 07, 02[E21B]
6209667 Drill string fittingFeb 12, 98Apr 03, 01[E21B]
6105675 Downhole window milling apparatus and method for using the sameJan 05, 99Aug 22, 00[E21B]
6014933 Downhole charge carrierOct 02, 97Jan 18, 00[F42B, E21B]
5918688 Gas-filled acceleratorOct 09, 97Jul 06, 99[E21B]
5884716 Constant bottom contact thrusterOct 16, 96Mar 23, 99[E21B]
5818352 Well data telemetry systemNov 21, 97Oct 06, 98[G01V]
5778976 Casing installation equipmentAug 14, 96Jul 14, 98[E21B]
5775444 Drill string orienting motorOct 23, 96Jul 07, 98[E21B]
5624001 Mechanical-hydraulic double-acting drilling jarJun 07, 95Apr 29, 97[E21B]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6361217 High capacity thrust bearingExpiredJun 22, 99Mar 26, 02[F16C]
6135217 Converted dual-acting hydraulic drilling jarExpiredJan 19, 99Oct 24, 00[E21B]
6116354 Rotary steerable system for use in drilling deviated wellsExpiredMar 19, 99Sep 12, 00[E21B]
5984028 Converted dual-acting hydraulic drilling jarExpiredJul 15, 97Nov 16, 99[E21B]
5669457 Drill string orienting toolExpiredJan 02, 96Sep 23, 97[E21B]
5165492 Apparatus for preventing separation of a down-hole motor from a drill stringExpiredOct 26, 90Nov 24, 92[E21B]
5111885 Decentralized casing hole puncherExpiredOct 17, 90May 12, 92[E21B]
5086851 Combination thrust and radial bearing for use in down-hole drilling toolsExpiredOct 26, 90Feb 11, 92[F16C, E21B]
4878539 Method and system for maintaining and producing horizontal well boresExpiredAug 02, 88Nov 07, 89[E21B]
4873675 Method and apparatus for seismic exploration of strata surrounding a boreholeExpiredJun 10, 88Oct 10, 89[G01V]
4844183 Accelerator for fishing jar with hydrostatic assistExpiredOct 28, 87Jul 04, 89[E21B]
4838353 System for completing and maintaining lateral wellsExpiredAug 02, 88Jun 13, 89[E21B]
4727749 Method and apparatus for leak testing of pipeExpiredMay 29, 86Mar 01, 88[G01M]
4715454 Mechanical directional drilling jar with swivel meansExpiredJun 03, 86Dec 29, 87[E21B]
4630690 Spiralling tapered slip-on drill string stabilizerExpiredJul 12, 85Dec 23, 86[E21B]
4600062 Shock absorbing drilling toolExpiredJul 13, 84Jul 15, 86[F16D, E21B]
4600063 Double-taper slip-on drill string stabilizerExpiredMay 29, 84Jul 15, 86[E21B]
4566546 Single acting hydraulic fishing jarExpiredSep 10, 84Jan 28, 86[E21B]
4548069 Pipe testing toolExpiredApr 26, 83Oct 22, 85[G01M]
4526241 Adjustable length drilling subExpiredMay 27, 83Jul 02, 85[F21B]

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