Method and apparatus for data transmission in a well using a...

Method and apparatus for de-icing oil wells

Method and apparatus for de-watering producing gas wells

Method and apparatus for decoding a signal sent from a...

Method and apparatus for deep gas well completions

Method and apparatus for deepwater drilling

Method and apparatus for deflecting bore holes in...

Method and apparatus for deploying a plurality of seismic...

Method and apparatus for deploying a well tool into a...

Method and apparatus for deployment and retrieval of fixed...

Method and apparatus for deployment, mounting and coupling...

Method and apparatus for detecting particulate material in...

Method and apparatus for determination of gas in place

Method and apparatus for determining depth of drill cuttings

Method and apparatus for determining destructive torque on a...

Method and apparatus for determining downhole pressures...

Method and apparatus for determining downhole pressures...

Method and apparatus for determining drill string movement mode

Method and apparatus for determining drill string movement mode

Method and apparatus for determining drilling paths to...