Automatic downhole drilling system.

摘要

An automatic closed loop drilling system provides automatic directional drilling capabilities in a bottomhole assembly, and includes at least one adjustable stabilizer (10) that varies in response to formational and drilling conditions encountered downhole. A microcontroller (40) is preprogrammed with a desired range of formation characteristics or with a desired inclination or target area. The microcontroller compares actual sensed data with the desired data and adjusts the position of the stabilizer blade (17) to vary the direction of drilling. <IMAGE> <IMAGE>