Non-rotating sensor assembly for measurement-while-drilling...
Non-rotating sensor assembly for measurement-while-drilling...
Non-rotating sensor assembly for measurement-while-drilling...
Non-rotating sensor assembly for measurement-while-drilling...
Obstacle detection system for underground operations
Oil drilling tool
Oil-based drilling fluids suitable for drilling in the presence
On-bit, analog multiplexer for transmission of multi-channel...
Open hole logging for drilling rigs
Optimized drilling with positive displacement drilling motors
Orientation device for a core sample
Oriented-radial-cores retrieval for measurements of directional
Orienting and circulating sub
Oscillating shear valve for mud pulse telemetry
Path mapping in underground boring tool applications
Percent grade boring and monitoring apparatus
Percussion boring machine with run monitoring
Permanent downhole deployment of optical sensors
Pilot head for laying pipes in the ground
Pressure reading tool