73812043
Jul 12, 1989
Feb 5, 1991
ELECTRONIC APPARATUS FOR MEASURING DIRECTIONAL AND HORIZONTAL DRILLING DATA, NAMELY, TOOL FACE, AZIMUTH, AND DRIFT ANGLES, DURING A DRILLING OPERATION
Electrical and Scientific ApparatusTECHNICAL RESEARCH AND CONSULTING SERVICES, NAMELY, ANALYSIS, INSPECTION, TESTING, RESEARCH, AND ENGINEERING STUDIES, ENGINEERING AND CIVIL ENGINEERING SERVICES, GEOLOGIC TECHNIQUES AND ESTIMATES, ALL IN THE FIELD OF DRILLING OPERATIONS
Computer and Scientific