Magnetorheological fluid controlled mud pulser
Means for varying MWD tool operating modes from the surface
Measure while drilling system
Measurement while drilling bi-directional pulser operating...
Measurement while drilling tool and method
Measurement-while-drilling acoustic system employing multiple, s
Measurement-while-drilling system and method
Measuring device for a drilling apparatus
Measuring while drilling apparatus mud pressure signal valve
Measuring while drilling employing cascaded transmission systems
Measuring-while drilling system and method having encoder with f
Method and apparatus for communicating between spaced locations
Method and apparatus for communicating coded messages in a wellb
Method and apparatus for communicating coded messages in a...
Method and apparatus for communicating data in a wellbore and fo
Method and apparatus for communicating data in a wellbore and fo
Method and apparatus for communications in a wellbore
Method and apparatus for downlink communication using...
Method and apparatus for filtering noise from data signals
Method and apparatus for generating acoustic signals for LWD...