Inventor
BOBROSKY DOUGLAS J
US3 patents
Patents
3 patentsUS6510906B1Jan 28, 2003
Impregnated bit with PDC cutters in cone area
BAKER HUGHES INC282 citations97
US6843333B2Jan 18, 2005
Impregnated rotary drag bit
BAKER HUGHES INC115 citations95
US6397958B1Jun 4, 2002
Reaming apparatus and method with ability to drill out cement and float equipment in casing
BAKER HUGHES INC51 citations89