INTEGRATED TRANSMITTER SURVEYING WHILE BORING (SWB) ENTRENCHING POWERING DEVICE FOR THE CONTINUATION OF A GUIDED BORE HOLE

摘要

A bottom hole assembly for horizontal directional drilling that improves the accuracy of surveying while boring by enabling the progress of the bore to be monitored and tracked with the aid of a sonde. In one embodiment the sonde is received in the wall of a housing area of a mud motor surrounding the bearing mandrel, in another embodiment the sonde is carried in the wall of a collar surrounding the bearing mandrel housing, and in an additional embodiment the sonde is carried in an adaptor between the bearing mandrel and the bit.