A jar for use in a downhole toolstring

A load cell for a downhole load measuring tool

A logging while producing apparatus and method

A low friction centralizer

A measuring sonde for a hydrocarbon well

A method and a device for directional control of a rock...

A method and a device for directional drilling

A method and a device for expanding a body under overpressure

A method and a device for hauling a casing or the like up...

A method and a device for in situ formation of a seal in an...

A method and a device for regulating a fluid flow between an...

A method and a device for sealing a void incompletely filled...

A method and a device for solvent injection in a subsurface...

A method and a device for use in coiled tubing operations

A method and a system for determining the position of a...

A method and a system for enhanced flow line control

A method and a system for feedback control or monitoring of...

A method and an apparatus for production testing involving...

A method and an apparatus for separation and injection of...

A method and an arrangement for controlling a rock drill