Assignee
BJ HUGHES INC
US·35 granted patents·1,155 citations·filing 1973–1981
Top patents by PatentIndex Score
35 records- 0194US4275788AMethod of plugging a wellBJ HUGHES INC·Filed 1980·Granted Jun 30, 1981·125 cites·20 claims
- 0292US3976207ACasing stabbing apparatusBJ HUGHES INC·Filed 1975·Granted Aug 24, 1976·56 cites·7 claims
- 0391US4345864APipe manipulatorBJ HUGHES INC·Filed 1980·Granted Aug 24, 1982·80 cites·4 claims
- 0490US4304433APipe gripping headBJ HUGHES INC·Filed 1980·Granted Dec 8, 1981·101 cites·5 claims
- 0587US4132243AApparatus for feeding perforation sealer balls and the like into well treating fluidBJ HUGHES INC·Filed 1977·Granted Jan 2, 1979·80 cites·6 claims
- 0686US4128888AVelocity control arrangement for a computer-controlled oil drilling rigBJ HUGHES INC·Filed 1977·Granted Dec 5, 1978·37 cites·10 claims
- 0783US4187546AComputer-controlled oil drilling rig having drawworks motor and brake control arrangementBJ HUGHES INC·Filed 1977·Granted Feb 5, 1980·62 cites·7 claims
- 0883US4139891AElevator load control arrangement for a computer-controlled oil drilling rigBJ HUGHES INC·Filed 1977·Granted Feb 13, 1979·52 cites·9 claims
- 0982US4042014AMultiple stage cementing of well casing in subsea wellsBJ HUGHES INC·Filed 1976·Granted Aug 16, 1977·67 cites·28 claims
- 1080US4030746APipe handling headBJ HUGHES INC·Filed 1976·Granted Jun 21, 1977·29 cites·19 claims
- 1178US4351116AApparatus for making multiple orientation measurements in a drill stringBJ HUGHES INC·Filed 1980·Granted Sep 28, 1982·57 cites·4 claims
- 1275US4126348AUniversal handling head for a pipe rackerBJ HUGHES INC·Filed 1977·Granted Nov 21, 1978·56 cites·13 claims
- 1374US4109800AMulti-stage well-drilling mast assemblyBJ HUGHES INC·Filed 1973·Granted Aug 29, 1978·33 cites·20 claims
- 1474US4109488AShock absorbing rotary drive couplingBJ HUGHES INC·Filed 1976·Granted Aug 29, 1978·19 cites·12 claims
- 1573US3996737AMethod of manufacturing elevator links and a cast elevator link blank for use in the methodBJ HUGHES INC·Filed 1975·Granted Dec 14, 1976·35 cites·14 claims
- 1666US4361940ASlip-type elevator locking mechanismBJ HUGHES INC·Filed 1981·Granted Dec 7, 1982·37 cites·17 claims
- 1766US4345648AInflatable packer systemBJ HUGHES INC·Filed 1980·Granted Aug 24, 1982·36 cites·63 claims
- 1865US4332619AExpansive admixtureBJ HUGHES INC·Filed 1980·Granted Jun 1, 1982·23 cites·5 claims
- 1960US4316504ACheck/relief valve for an inflatable packer systemBJ HUGHES INC·Filed 1980·Granted Feb 23, 1982·19 cites·4 claims
- 2059US4328038AResin coated aluminumBJ HUGHES INC·Filed 1980·Granted May 4, 1982·20 cites·8 claims
- 2159US4327261AApparatus for sensing a distended location on a drill pipeBJ HUGHES INC·Filed 1979·Granted Apr 27, 1982·9 cites·12 claims
- 2254US4050512AStroke actuated well testing toolBJ HUGHES INC·Filed 1976·Granted Sep 27, 1977·20 cites·6 claims
- 2352US4119837ABlock position and speed transducer for a computer-controlled oil drilling rigBJ HUGHES INC·Filed 1977·Granted Oct 10, 1978·12 cites·6 claims
- 2449US4216590AWide angle inclinometerBJ HUGHES INC·Filed 1979·Granted Aug 12, 1980·14 cites·14 claims
- 2548US3966054AShock absorber for tubular storage or drill stands on a drilling shipBJ HUGHES INC·Filed 1975·Granted Jun 29, 1976·12 cites·3 claims
- 2644US4163401AElectro-hydraulic interface for a power tongsBJ HUGHES INC·Filed 1977·Granted Aug 7, 1979·6 cites·4 claims
- 2744US4050948AMethod of making lightweight cement slurries and their usesBJ HUGHES INC·Filed 1976·Granted Sep 27, 1977·8 cites·7 claims
- 2839US4333209ARotary power slipsBJ HUGHES INC·Filed 1980·Granted Jun 8, 1982·13 cites·4 claims
- 2939US3999260ARotary power slip assemblyBJ HUGHES INC·Filed 1976·Granted Dec 28, 1976·14 cites·13 claims
- 3034US4320803AValve retrieval mechanism for an inflatable packer systemBJ HUGHES INC·Filed 1980·Granted Mar 23, 1982·7 cites·5 claims
- 3131US4186973ADeck-mounted shaft bushingBJ HUGHES INC·Filed 1978·Granted Feb 5, 1980·3 cites·18 claims
- 3230US4332298AValve assembly for an inflatable packer systemBJ HUGHES INC·Filed 1980·Granted Jun 1, 1982·6 cites·11 claims
- 3328US4381034AZero free water cement composition and methodBJ HUGHES INC·Filed 1980·Granted Apr 26, 1983·1 cites·3 claims
- 3428US4345653APacker deflate subassembly for an inflatable packer systemBJ HUGHES INC·Filed 1980·Granted Aug 24, 1982·5 cites·7 claims
- 3527US4111235APipe capBJ HUGHES INC·Filed 1976·Granted Sep 5, 1978·1 cites·10 claims
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