Method and apparatus for retrieving logging data from a downhole
Method and apparatus for transmitting information in a borehole
Method and apparatus for transmitting information in a borehole
Method and apparatus for transmitting information in a borehole
Method and means for transmitting data through a drill string in
Method and tool for logging-while-drilling
Method for detection of influx gas into a marine riser of an oil
Method of decoding MWD signals using annular pressure signals
Method of filtering pump noise
Methods and apparatus for preventing jamming of encoder of loggi
Methods and apparatus for reducing interfering effects in measur
Mud operated pulser
Mud pressure control system
Mud pressure control system with magnetic torque transfer
Mud pulse pressure signal generator
Mud pulse telemetry
Mud pump noise cancellation system and method
MWD surface signal detector having bypass loop acoustic detectio