Cable device for detecting and monitoring rock and soil...
Carrierless amplitude and phase modulation telementry for use in
Casing mounted sensors, actuators and generators
Casing mounted sensors, actuators and generators
Coal boundary detection using an electric-field borehole...
Coil tubing string and downhole generator
Common interface architecture for horizontal directional...
Common interface architecture for horizontal directional...
Communicating with an underground object
Communication abnormality detecting/coping device and vacuum...
Communication system for down hole use
Communication system for down hole use
Communications protocol for digital telemetry system
Communications protocol for digital telemetry system
Communications system having redundant channels
Communications systems in a well
Composite pipe telemetry conduit
Conductor system for well bore data transmission
Control apparatus for automated downhole tools
Controlling an underground object