9
INSTRUMENTATION UTILIZED IN THE DRILLING OF OIL AND GAS WELLS, NAMELY, GAS DETECTORS, TRIP GUARDS, FLOW SENSORS AND TRANSMITTING TRIP MONITORS, LOSS/GAIN INDICATORS, PUMP STROKE COUNTERS, PIT VOLUME TOTALIZERS, SURFACE MUD MONITORS, ELECTRONIC DRILLING RECORDERS, DRILLING CHOKES, CHOKE POSITION INDICATORS, PUMP PRESSURE MONITORS AND MUD LOGGER PERSONAL COMPUTER INTERFACES
35
RETAIL STORES SERVICES, FEATURING INSTRUMENTATION UTILIZED IN DRILLING OF OIL AND GAS WELLS, NAMELY, GAS DETECTORS, ELECTRONIC TRIP GUARDS, FLOW SENSORS AND TRANSMITTING TRIP MONITORS LOSS/GAIN INDICATORS, PUMP STROKE COUNTERS, PIT VOLUME TOTALIZERS, ELECTRONIC DRILLING RECORDERS, DRILLING CHOKES, CHOKE POSITION INDICATORS, PUMP PRESSURE MONITORS AND MUD LOGGER PERSONAL COMPUTER INTERFACES
37
Maintenance servicing and leasing of instrumention utilized in the drilling of oil and gas wells, namely,gas detectors, electronic trip guards, flow sensors and transmitting trip monitors, loss/gain indicators, pump stroke counters, pit volume totalizers, electronic drilling recorders, drilling interfaces
42
MAINTENANCE, SERVICING AND LEASING OF INSTRUMENTATION UTILIZED IN THE DRILLING OF OIL AND GAS WELLS, NAMELY, GAS DETECTORS, ELECTRONIC TRIP GUARDS, FLOW SENSORS AND TRANSMITTING TRIP MONITORS, LOSS/GAIN INDICATORS, PUMP STROKE COUNTERS, PIT VOLUME TOTALIZERS, ELECTRONIC DRILLING RECORDERS, DRILLING INTERFACES
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