ACCU-TRAK

ELECTRONIC MEASURING INSTRUMENTS FOR USE IN WELL DRILLING, COMPRISING INSTRUMENTS WHICH SENSE, MEASURE, TRANSMIT, RECORD AND PROVIDE READOUT OF DRIFT, AZIMUTH, TOOL FACE ORIENTATION, TEMPERATURE, AND GAMMA RAY AND ELECTRICAL RESISTIVITY; AUTOMATIC AND MANUAL VALVE ASSEMBLIES ALL SOLD AS A UNIT AND BATTERY PACK FOR THE ABOVE EQUIPMENT