DYNAMIC ORIENTATION APPARATUS AND METHOD FOR DRILLING A DEVIED WELL

摘要

The present invention relates to a system for guiding a deviated borehole (67) by dynamically orienting the drilling equipment, without using gyroscopic devices. It comprises a deflecting whistle (53) provided with magnets (57) and a measuring instrument during drilling. The latter comprises magnetic sensors (33, 37) determining precisely the orientation of the mud motor (71). This is transmitted to the surface and its adjustment is carried out in real time by rotating the drill string. /P