78813151
Feb 13, 2006
Downhole automated steering and formation evaluation system for use in oil, gas and geothermal well production and drilling, and other subterranean excavations consisting of drill bits, steerable drill bits, steering mechanisms, gamma ray sensors, resistivity sensors, pressure sensors, temperature sensors, strain sensors, vibration sensors, fluid sensors, acoustic sensors, gyroscopes and hydrometers
Electrical and Scientific Apparatus