Magnetic signalling in pipelines

Magnetic signalling in pipelines

Measurement while drilling electromagnetic telemetry system...

Measurement while drilling mud pulser control valve mechanism

Measuring tool for collecting down hole information and metering

Method and apparatus enhanced acoustic mud pulse telemetry

Method and apparatus for communicating signals from within an en

Method and apparatus for determining position in a pipe

Method and apparatus for determining position in a pipe

Method and apparatus for downhole signal communication and...

Method and apparatus for locating faults in wired drill pipe

Method and apparatus for LWD shear velocity measurement

Method and apparatus for LWD shear velocity measurement

Method and apparatus for LWD shear velocity measurement

Method and apparatus for mud pulse telemetry in underbalanced dr

Method and apparatus for performing diagnostics on a...

Method and apparatus for relaying downhole data to the surface

Method and apparatus for remote signal entry into measurement wh

Method and apparatus for stabilizing a communication sensor in a

Method and apparatus for transmitting and receiving data to...