Patent ID: 7336199
Filing Date: 2008-02-26
Classification: E21B

Abstract:
1. An inductive coupling system including: a mandrel including an inner bore; an inner sleeve including a bore surrounding at least a portion of the mandrel, the inner sleeve being rotatable relative to the mandrel; an outer housing including a bore surrounding at least a portion of the inner sleeve, the outer housing being rotatable relative to the inner sleeve; a mandrel electronics system including a communications port located in the mandrel inner bore; a housing electronics system located in the outer housing; a communication probe extending from the wall of the mandrel into the mandrel inner bore; a housing inductive coupler including a housing outer coil located in and moving with the outer housing and a housing inner coil located in and moving with the mandrel, the inner sleeve located between the housing inner coil and the housing outer coil, the housing outer coil being in electric communication with the housing electronics system; and a mandrel inductive coupler including a mandrel coil located in the communications port and a probe coil located in the communication probe, the mandrel coil being in electric communication with the mandrel electronics system and the probe coil being in electric communication with the housing inner coil through the communication probe.