Directional drilling control devices and methods

摘要

The instant invention provides apparatus and methods for directional drilling. One embodiment of the invention provides a drill control system including an uphole control device and a downhole control device. The uphole control device is configured to: transmit a reference trajectory to the dowriliole control device and receive information about an actual trajectory from the downhole control device. The downhole control device is configured to: receive the reference trajectory front the uphole control device, measure the actual trajectory, correct deviations between the reference trajectory and the actual trajectory, and transmit information about the actual trajectory to the uphole control device.