Inventor
WELCH WILLIAM R
US18 patents
⚠️ This page may combine multiple inventors who share the name “WELCH WILLIAM R”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HALLIBURTON ENERGY SERV INC
6 patentsUS5875851AMar 2, 1999
Static wellhead plug and associated methods of plugging wellheads
HALLIBURTON ENERGY SERV INC132 citations98
US5735350AApr 7, 1998
Methods and systems for subterranean multilateral well drilling and completion
HALLIBURTON ENERGY SERV INC146 citations96
US5988277ANov 23, 1999
Running tool for static wellhead plug
HALLIBURTON ENERGY SERV INC51 citations95
US5996697ADec 7, 1999
Static wellhead plug
HALLIBURTON ENERGY SERV INC27 citations89
US5794699AAug 18, 1998
Metal-to-metal sliding side door for wells
HALLIBURTON ENERGY SERV INC19 citations81
US5957201ASep 28, 1999
Verification apparatus and method for a static wellhead plug
HALLIBURTON ENERGY SERV INC11 citations73
OTIS ENG CO
6 patentsUS4436152AMar 13, 1984
Shifting tool
OTIS ENG CO65 citations95
US4896721AJan 30, 1990
Locator shifter tool
OTIS ENG CO39 citations92
US4441558AApr 10, 1984
Valve
OTIS ENG CO51 citations89
US4997038AMar 5, 1991
Lock mandrel latch assembly
OTIS ENG CO14 citations74
US4962813AOct 16, 1990
Well tool locking system for staggered bore
OTIS ENG CO16 citations74
US4432416AFeb 21, 1984
Well flow control apparatus
OTIS ENG CO14 citations69
HALLIBURTON CO
4 patentsUS5564503AOct 15, 1996
Methods and systems for subterranean multilateral well drilling and completion
HALLIBURTON CO133 citations99
US5390742AFeb 21, 1995
Internally sealable perforable nipple for downhole well applications
HALLIBURTON CO272 citations98
US5355953AOct 18, 1994
Electromechanical shifter apparatus for subsurface well flow control
HALLIBURTON CO90 citations96
US5309988AMay 10, 1994
Electromechanical shifter apparatus for subsurface well flow control
HALLIBURTON CO62 citations96