Apparatus and method to reduce fluid pressure in a wellbore
Apparatus and method to reduce fluid pressure in a wellbore
Apparatus and method to reduce fluid pressure in a wellbore
Apparatus for controlling the feed drive of a boring mechanism f
Apparatus for controlling the force applied to a drill bit while
Apparatus for providing a thrust force to an elongate body in a
Arrangement for controlling the feed mechanism of a rock drill
Arrangement in a hydraulically operated rock drilling equipment
Attitude and drilling-direction control device
Attitude control device and drilling-direction control device
Autodriller bit protection system and method
Automated bore planning method and apparatus for horizontal...
Automated bore planning system for horizontal directional...
Automated control system for back-reaming
Automated drill
Automated rock burner
Automated rock burner
Automatic control of drilling system
Automatic control system for connecting a dual-member pipe
Automatic control system for connecting a dual-member pipe