Inventor
HENNIG GREGORY E
GB3 patents
Patents
3 patentsUS5697449ADec 16, 1997
Apparatus and method for temporary subsurface well sealing and equipment anchoring
BAKER HUGHES INC132 citations96
US5609178AMar 11, 1997
Pressure-actuated valve and method
BAKER HUGHES INC210 citations94
US6145593ANov 14, 2000
Main bore isolation assembly for multi-lateral use
BAKER HUGHES INC74 citations92