Inventor

CRAWFORD MICHAEL B

US2 patents

Patents

2 patents

US7543660B2Jun 9, 2009

Roller cone drill bit with debris diverter plugs

HALLIBURTON ENERGY SERV INC3 citations60

US7484572B2Feb 3, 2009

Roller cone drill bit with debris flow paths through associated support arms

HALLIBURTON ENERGY SERV INC1 citations49