Ge Energy Oilfield Technology, Inc.

Michael Doan

Mark Miller

Craig Macdonald

A gap sub comprises at least one electrically isolating threaded joint in a conductive tubular collar. The threads of the joints are isolated by a non-conductive coating. The shoulders of the joints are separated by an isolating ring. Annular faces on the ring make contact with the shoulders in the joints. The ring is made of conductive material with a non-conductive coating deployed on (1) at least one of the ring's annular faces, and (2) the interior surface of the ring. An annular recess in the collar prevents electrical contact between collar sections nearby the ring on either side of at least one threaded joint.

Growing community of inventors

Missouri City, TX, United States of America

Michael Doan