DRIVINNRETNING TILKNYTTET EN BORESTRENG OG OMFATTENDE EN HYDROSTATISK BOREFLUIDKRETS, SAMT FREMGANGSMAATE FOR BRUK AV INNRETNINGEN

摘要

- the present invention relates to an actuating device at a distance of a piece of equipment (3) associated with a drill string (1) by hydraulic means (10); 53, 58) of cooperating with the distribution means (7, 25, 26, 27; 47) associated with the drilling fluid. & br / - the displacement means of this device transform directly the hydraulic energy of the drilling fluid into mechanical energy to be actuated without the cooperation of the other fluid that the drilling fluid. & br / - the invention also relates to a method of operation using the device. & br / - application to the directional drilling in the petroleum field.