Apparatus for the generation of pressure pulses in drilling mud

Apparatus for transmitting data from a borehole to the surface o

Apparatus for well logging telemetry

Apparatus, method and system for digitally transmitting...

Autonomous data transmission apparatus

Borehole acoustic telemetry clock synchronization system

Borehole acoustic telemetry system

Borehole acoustic telemetry system synchronous detector

Borehole acoustic telemetry system with phase shifted signal

Borehole data transmission apparatus

Borehole liquid acoustic wave transducer

Borehole logging apparatus for deep well drilling

Borehole measurement while drilling systems and methods

Borehole monitoring device and method

Borehole telemetry system automatic gain control

Carrier tracking apparatus and method for a logging-while-drilli

Circuit for echo and noise suppression of accoustic signals tran

Combinatorial coded telemetry in MWD

Communications and power harvesting system for in-pipe...

Correlation for combinational coded telemetry