Inventor
DICKSON RENNIE L
US21 patents
⚠️ This page may combine multiple inventors who share the name “DICKSON RENNIE L”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
OTIS ENG CO
9 patentsUS4624315ANov 25, 1986
Subsurface safety valve with lock-open system
OTIS ENG CO115 citations96
US4723606AFeb 9, 1988
Surface controlled subsurface safety valve
OTIS ENG CO64 citations95
US5249630AOct 5, 1993
Perforating type lockout tool
OTIS ENG CO102 citations94
US4834183AMay 30, 1989
Surface controlled subsurface safety valve
OTIS ENG CO66 citations94
US5179973AJan 19, 1993
Valve with pressure assisted closing system
OTIS ENG CO22 citations92
US5050839ASep 24, 1991
Valve
OTIS ENG CO29 citations92
US4945993AAug 7, 1990
Surface controlled subsurface safety valve
OTIS ENG CO44 citations92
US4632184ADec 30, 1986
Submersible pump safety systems
OTIS ENG CO36 citations87
US5137089AAug 11, 1992
Streamlined flapper valve
OTIS ENG CO19 citations81
HALLIBURTON ENERGY SERV INC
8 patentsUS5875851AMar 2, 1999
Static wellhead plug and associated methods of plugging wellheads
HALLIBURTON ENERGY SERV INC132 citations98
US5826661AOct 27, 1998
Linear indexing apparatus and methods of using same
HALLIBURTON ENERGY SERV INC149 citations98
US6119783ASep 19, 2000
Linear indexing apparatus and methods of using same
HALLIBURTON ENERGY SERV INC111 citations97
US5988277ANov 23, 1999
Running tool for static wellhead plug
HALLIBURTON ENERGY SERV INC51 citations95
US6352118B1Mar 5, 2002
System and method for communication hydraulic control to a wireline retrievable downhole device
HALLIBURTON ENERGY SERV INC64 citations91
US6394187B1May 28, 2002
Flapper valve assembly apparatus and method
HALLIBURTON ENERGY SERV INC61 citations90
US5996697ADec 7, 1999
Static wellhead plug
HALLIBURTON ENERGY SERV INC27 citations89
US5957201ASep 28, 1999
Verification apparatus and method for a static wellhead plug
HALLIBURTON ENERGY SERV INC11 citations73