Inventor · disambiguated record
Joseph L. Pearce
Also filed as: PEARCE JOSEPH L · PEARCE JR JOSEPH L
12 granted patents·646 citations·filing 1976–1997
94Inventor score
Technology areasE21B
Top patents by PatentIndex Score
12 records- 0193US4730677AMethod and system for maintenance and servicing of subsea wellsOTIS ENG CO·Filed 1986·Granted Mar 15, 1988·165 cites·28 claims
- 0292US5188182ASystem containing expendible isolation valve with frangible sealing member, seat arrangement and method for useOTIS ENG CO·Filed 1991·Granted Feb 23, 1993·162 cites·29 claims
- 0378US4273186AWell safety valve systemOTIS ENG CO·Filed 1978·Granted Jun 16, 1981·40 cites·21 claims
- 0477US4574883AWell tool stopping devices, systems and methodsOTIS ENG CO·Filed 1982·Granted Mar 11, 1986·51 cites·40 claims
- 0573US4227573AReinforced seal unit for pumpdown pistons or well swabsOTIS ENG CO·Filed 1978·Granted Oct 14, 1980·32 cites·15 claims
- 0671US5535767ARemotely actuated adjustable choke valve and method for using sameHALLIBURTON CO·Filed 1995·Granted Jul 16, 1996·62 cites·84 claims
- 0769US4258794AUnderwater completion habitatOTIS ENG CO·Filed 1979·Granted Mar 31, 1981·34 cites·6 claims
- 0858US6062307AScreen assemblies and methods of securing screensHALLIBURTON ENERGY SERV INC·Filed 1997·Granted May 16, 2000·38 cites·17 claims
- 0954US4035011ASoft set running toolOTIS ENG CO·Filed 1976·Granted Jul 12, 1977·18 cites·17 claims
- 1050US5163515APumpdown toolstring operations in horizontal or high-deviation oil or gas wellsNORSKE STATS OLJESELSKAP·Filed 1991·Granted Nov 17, 1992·25 cites·11 claims
- 1147US5067657ABurner nozzleHALLIBURTON CO·Filed 1989·Granted Nov 26, 1991·18 cites·5 claims
- 1228US4465132AReleasable well tool stopping devices and systemsOTIS ENG CO·Filed 1982·Granted Aug 14, 1984·1 cites·17 claims
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