Inventor

ASHY THOMAS M

US2 patents

Patents

2 patents

US7954555B2Jun 7, 2011

Full function downhole valve and method of operating the valve

BAKER HUGHES INC21 citations86

US7703533B2Apr 27, 2010

Shear type circulation valve and swivel with open port reciprocating feature

BAKER HUGHES INC3 citations58