Inventor
ZADRAPA GLENN R
US8 patents
Patents
8 patentsUS6626251B1Sep 30, 2003
Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations
BAKER HUGHES INC115 citations98
US6540033B1Apr 1, 2003
Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations
BAKER HUGHES INC167 citations98
US6230822B1May 15, 2001
Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations
BAKER HUGHES INC111 citations98
US7066280B2Jun 27, 2006
Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations
BAKER HUGHES INC73 citations97
US6571886B1Jun 3, 2003
Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations
BAKER HUGHES INC98 citations97
US6543312B2Apr 8, 2003
Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations
BAKER HUGHES INC83 citations97
US6419032B1Jul 16, 2002
Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations
BAKER HUGHES INC51 citations95
US6227314B1May 8, 2001
Inclined leg earth-boring bit
BAKER HUGHES INC20 citations89