P

Inventor

PEARCE JOSEPH L

11 patents
⚠️ This page may combine multiple inventors who share the name “PEARCE JOSEPH L”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

OTIS ENG CO

8 patents
US5188182AFeb 23, 1993

System containing expendible isolation valve with frangible sealing member, seat arrangement and method for use

OTIS ENG CO162 citations97
US4730677AMar 15, 1988

Method and system for maintenance and servicing of subsea wells

OTIS ENG CO165 citations95
US4273186AJun 16, 1981

Well safety valve system

OTIS ENG CO40 citations92
US4227573AOct 14, 1980

Reinforced seal unit for pumpdown pistons or well swabs

OTIS ENG CO32 citations92
US4574883AMar 11, 1986

Well tool stopping devices, systems and methods

OTIS ENG CO51 citations91
US4258794AMar 31, 1981

Underwater completion habitat

OTIS ENG CO34 citations88
US4035011AJul 12, 1977

Soft set running tool

OTIS ENG CO18 citations73
US4465132AAug 14, 1984

Releasable well tool stopping devices and systems

OTIS ENG CO1 citations50

HALLIBURTON CO

1 patent
US5535767AJul 16, 1996

Remotely actuated adjustable choke valve and method for using same

HALLIBURTON CO62 citations95

NORSKE STATS OLJESELSKAP

1 patent
US5163515ANov 17, 1992

Pumpdown toolstring operations in horizontal or high-deviation oil or gas wells

NORSKE STATS OLJESELSKAP25 citations92

HALLIBURTON ENERGY SERV INC

1 patent
US6062307AMay 16, 2000

Screen assemblies and methods of securing screens

HALLIBURTON ENERGY SERV INC38 citations89