Halliburton Energy Services, Inc.

Paul D Beene

Paul F Rodney

Christopher A Golla

Laban M Marsh

Bipin Kumar Pillai

Cili Sun

Chen-Kang David Chen

Chris A Golla

A method and related apparatus for telemetry between downhole devices and surface devices. In particular, the methods and related apparatus may send a first datum of a first parameter in an uncompressed form, and send a second datum of the first parameter in compressed form.

Method and apparatus for telemetry

Method and apparatus for mud pulse telemetry

A method and apparatus for detecting torsional vibration, or stick-slip, in a drill string while drilling is described. The method comprises sampling a downhole pressure sensor and using embedded filter schemes and algorithms to determine, based on the pressure samples, whether torsional vibration is occurring in the drill string. The method may also include sending a warning signal to the surface of the well. The apparatus comprises a downhole assembly having a downhole receiver and a master controller. The downhole receiver comprises a pressure sensor, filter schemes, and algorithms for detecting torsional vibration. The downhole assembly may also include a downhole transmitter for sending a warning signal to the surface of the well.

Method and apparatus for detecting torsional vibration with a downhole pressure sensor

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Kingwood, TX, United States of America

Paul D Beene