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Electromagnetic anti-jam telemetry tool

United States Patent

February 12, 2008
View the Complete Patent at the US Patent & Trademark Office
A mud-pulse telemetry tool includes a tool housing, a motor disposed in the tool housing, and a magnetic coupling coupled to the motor and having an inner shaft and an outer shaft. The tool may also include a stator coupled to the tool housing, a restrictor disposed proximate the stator and coupled to the magnetic coupling, so that the restrictor and the stator adapted to generate selected pulses in a drilling fluid when the restrictor is selectively rotated. The tool may also include a first anti-jam magnet coupled to the too housing, and an second anti-jam magnet disposed proximate the first anti-jam magnet and coupled to the inner shaft and/or the outer shaft, wherein at least one of the first anti-jam magnet and the second anti-jam magnet is an electromagnet, and wherein the first anti-jam magnet and the second anti-jam magnet are positioned with adjacent like poles.
Ganesan; Harini (Sugar Land, TX), Mayzenberg; Nataliya (Missouri City, TX)
Schlumberger Technology Corporation (Sugar Land, TX)
10/ 905,953
January 27, 2005
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with Government support under Cooperative Agreement No. DE-FC26-03NT41835 awarded by the Department of Energy (DOE). The Government may have certain rights in this invention.