Inventor

IMWALLE WILLIAM M

US3 patents

Patents

3 patents

US6374924B2Apr 23, 2002

Downhole drilling apparatus

HALLIBURTON ENERGY SERV INC98 citations95

US6585040B2Jul 1, 2003

Downhole drilling apparatus

HALLIBURTON ENERGY SERV INC66 citations94

US6550550B2Apr 22, 2003

Downhole drilling apparatus

HALLIBURTON ENERGY SERV INC10 citations71