IP Library › Granted Patent US 4,867,255
Granted Patent Utility
US 4,867,255 · App. 07/196,945

Technique for steering a downhole hammer

Inventors: Glen Baker, Dmitry Feldman, Shiu S. Ng, Albert W. Chau, John E. Mercer
Patented Case View Patent ↗
Granted: Sep 19, 1989 Filed: May 20, 1988
Inventors
Glen Baker
Dmitry Feldman
Shiu S. Ng
Albert W. Chau
John E. Mercer
Assignee (at issue)
FlowMole Corporation

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Quick Facts
Patent No.
US 4,867,255
App. No.
07/196,945
Filed
1988-05-20
Granted
1989-09-19
Kind
A