BAKER HUGHES LIMITED

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
E21B EARTH OR ROCK DRILLING 393
 
  
 
B01D SEPARATION 2132
 
  
 
A61L METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES 170
 
  
 
B04C APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES 112
 
  
 
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
6213208 Three component separation in an oil wellMar 18, 98Apr 10, 01[E21B]
6183646 Biofouling reductionDec 14, 98Feb 06, 01[A61L]
6089317 Cyclonic separator assembly and methodJun 24, 98Jul 18, 00[E21B]
5605172 Fluid control valve and method for subjecting a liquid to a controlled pressure dropAug 11, 94Feb 25, 97[F16K]
5336410 Three chamber vessel for hydrocyclone separatorAug 01, 91Aug 09, 94[B04C, B01D]
5302294 Separation system employing degassing separators and hydroglyclonesMay 02, 91Apr 12, 94[B01D]
5129468 Method and apparatus for separating drilling and production fluidsNov 25, 91Jul 14, 92[E21B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6082452 Oil separation and pumping systemsExpiredSep 25, 97Jul 04, 00[E21B]
6080312 Downhole cyclonic separator assemblyExpiredMar 11, 96Jun 27, 00[B01D]
6068053 Fluid separation and reinjection systemsExpiredNov 07, 97May 30, 00[E21B]
5514266 Oil-water separation apparatus employing a floating skimmer, a hydrocyclone and a tubular separation deviceExpiredMay 10, 94May 07, 96[B01D]
5507955 Method of operating hydrocyclone systems by adding water to maintain flow ratesExpiredMar 16, 93Apr 16, 96[B01D]
5498346 Hydrocyclones for oil spill cleanup having a controlled split ratioExpiredSep 06, 94Mar 12, 96[B01D]
5366641 Hydrocyclones for oil spill cleanup with oil slug monitorExpiredDec 21, 92Nov 22, 94[B01D]
5350525 System and process for hydrocyclone separation of particulate solids and at least one liquid phase from a multiphase liquid mixtureExpiredSep 11, 92Sep 27, 94[B01D]
5154826 Hydrocyclone overflow transportExpiredMar 14, 90Oct 13, 92[B04C]
5110471 High efficiency liquid/liquid hydrocycloneExpiredAug 30, 90May 05, 92[B04C]
5093006 Liquid separatorExpiredDec 08, 89Mar 03, 92[B01D]
5071556 Hydrocyclone having a high efficiency area to volume ratioExpiredAug 30, 90Dec 10, 91[B04C]
5071557 Liquid/liquid hydrocycloneExpiredAug 30, 90Dec 10, 91[B04C]
5055202 Method and apparatus for maintaining predetermined cyclone separation efficiencyExpiredSep 15, 89Oct 08, 91[B01D]
5049277 Cyclone separatorExpiredDec 11, 89Sep 17, 91[B01D]
4966703 Cyclone separatorExpiredAug 07, 89Oct 30, 90[B01D]
4869016 Marine biofouling reductionExpiredJul 15, 87Sep 26, 89[A01M]
4822484 Treatment of multiphase mixturesExpiredJul 31, 87Apr 18, 89[B01D]
4816165 Liquid separating methodExpiredJun 03, 87Mar 28, 89[B01D]
4810382 Cyclone separatorExpiredMar 02, 87Mar 07, 89[B01D]

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