Inventor
MCMAHAN MICHAEL E
US17 patents
⚠️ This page may combine multiple inventors who share the name “MCMAHAN MICHAEL E”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HALLIBURTON CO
7 patentsUS4452313AJun 5, 1984
Circulation valve
HALLIBURTON CO77 citations96
US4691779ASep 8, 1987
Hydrostatic referenced safety-circulating valve
HALLIBURTON CO72 citations95
US4915171AApr 10, 1990
Above packer perforate test and sample tool and method of use
HALLIBURTON CO21 citations82
US4458762AJul 10, 1984
Recloseable auxiliary valve
HALLIBURTON CO25 citations82
US4421172ADec 20, 1983
Drill pipe tester and safety valve
HALLIBURTON CO15 citations73
US4420045ADec 13, 1983
Drill pipe tester and safety valve
HALLIBURTON CO20 citations73
US4295361AOct 20, 1981
Drill pipe tester with automatic fill-up
HALLIBURTON CO12 citations73
BAKER HUGHES INC
5 patentsUS6167963B1Jan 2, 2001
Removable non-metallic bridge plug or packer
BAKER HUGHES INC285 citations98
US7360592B2Apr 22, 2008
Compliant cladding seal/hanger
BAKER HUGHES INC47 citations92
US6131663AOct 17, 2000
Method and apparatus for positioning and repositioning a plurality of service tools downhole without rotation
BAKER HUGHES INC75 citations91
US6964305B2Nov 15, 2005
Cup seal expansion tool
BAKER HUGHES INC14 citations84
US6739391B2May 25, 2004
Surface deployed cement separation plug
BAKER HUGHES INC7 citations73