Inventor
UPCHURCH JAMES M
US20 patents
Patents
20 patentsUS4915168AApr 10, 1990
Multiple well tool control systems in a multi-valve well testing system
SCHLUMBERGER TECHNOLOGY CORP158 citations99
US4896722AJan 30, 1990
Multiple well tool control systems in a multi-valve well testing system having automatic control modes
SCHLUMBERGER TECHNOLOGY CORP170 citations99
US4856595AAug 15, 1989
Well tool control system and method
SCHLUMBERGER TECHNOLOGY CORP148 citations99
US4796699AJan 10, 1989
Well tool control system and method
SCHLUMBERGER TECHNOLOGY CORP217 citations99
US4403659ASep 13, 1983
Pressure controlled reversing valve
SCHLUMBERGER TECHNOLOGY CORP177 citations99
USRE39583EApr 24, 2007
Multiple well tool control systems in a multi-valve well testing system having automatic control modes
SCHLUMBERGER TECHNOLOGY CORP52 citations96
US5050675ASep 24, 1991
Perforating and testing apparatus including a microprocessor implemented control system responsive to an output from an inductive coupler or other input stimulus
SCHLUMBERGER TECHNOLOGY CORP93 citations96
US4971160ANov 20, 1990
Perforating and testing apparatus including a microprocessor implemented control system responsive to an output from an inductive coupler or other input stimulus
SCHLUMBERGER TECHNOLOGY CORP95 citations96
US4609005ASep 2, 1986
Tubing isolation disc valve
SCHLUMBERGER TECHNOLOGY CORP58 citations96
US4576234AMar 18, 1986
Full bore sampler valve
SCHLUMBERGER TECHNOLOGY CORP122 citations96
US4553428ANov 19, 1985
Drill stem testing apparatus with multiple pressure sensing ports
SCHLUMBERGER TECHNOLOGY CORP73 citations96
US4509604AApr 9, 1985
Pressure responsive perforating and testing system
SCHLUMBERGER TECHNOLOGY CORP57 citations96
US4320800AMar 23, 1982
Inflatable packer drill stem testing system
SCHLUMBERGER TECHNOLOGY CORP68 citations96
US5058673AOct 22, 1991
Hydraulically set packer useful with independently set straddle packers including an inflate/deflate valve and a hydraulic ratchet associated with the straddle packers
SCHLUMBERGER TECHNOLOGY CORP62 citations95
US4633945AJan 6, 1987
Permanent completion tubing conveyed perforating system
SCHLUMBERGER TECHNOLOGY CORP27 citations92
US4560000ADec 24, 1985
Pressure-activated well perforating apparatus
SCHLUMBERGER TECHNOLOGY CORP37 citations92
US4553598ANov 19, 1985
Full bore sampler valve apparatus
SCHLUMBERGER TECHNOLOGY CORP28 citations92
US4474242AOct 2, 1984
Annulus pressure controlled reversing valve
SCHLUMBERGER TECHNOLOGY CORP38 citations92
US4069866AJan 24, 1978
Pressure apportioning valve apparatus for use with multiple packers
SCHLUMBERGER TECHNOLOGY CORP15 citations74
US4923010AMay 8, 1990
Mud solids immune clean fluid compensating system
SCHLUMBERGER TECHNOLOGY CORP1 citations52