A method and apparatus for the preferential production of...

A method and apparatus for the underground ascertainment of...

A method and apparatus for transferring materials into a...

A method and apparatus for transmitting information between...

A method and apparatus for treating pressurized drilling...

A method and apparatus to turn on an electric device inside...

A method and device for controlling drilling fluid pressure

A method and device for establishing an underground well

A method and device for fluid displacement

A method and device for making lateral openings out of a...

A method and device for separation of a fluid, in particular...

A method and downhole tool actuator

A method and system for connecting pipe to a top drive motor

A method and system for controlling an excavating apparatus

A method and system for facilitating assembly of a drilling rig

A method and system for installing geothermal heat...

A method and system for monitoring a drilling operation

A method and system for removing liquid from a gas well

A method and system for steering and guiding a drill

A method and system using zeta potential altering...