- NATIONAL OIL VARCO
- WEATHERFORD
- BITSWAVE
- SIGNUM INSTRUMENTS
- QES DIRECTIONAL DRILLING
- VERTEX DOWNHOLE
- HALLIBURTON ENERGY SERVICES
- MWD SUPPLY
- CANRIG
- PROFESSIONAL DIRECTIONAL
- NATIONAL K WORKS
- WOLVERINE OILFIELD TECHNOLOGIES
- WELLBENDERS DIRECTIONAL
- PACIFIC SURVEYS
- SCHLUMBERGER
- PHOENIX SURVEYS, INC
- SAINT-GOBAIN CRYSTALS/DETECTORS
- GYRODATA
- TUCKER TECHNOLOGIES, INC
- UNIVERSAL SPECTRUM CORP
- CRESCENT DIRECTIONAL DRILLING
- PHOENIX TECHNOLOGY SERVICES
- APS TECHNOLOGY
- SPARTEK SYSTEMS
- STOCKHOLM PRECISION TOOLS
- GLOBAL NUCLEONICS
- NABORS
- EXXONMOBILE