Directional drilling control devices and methods

摘要

A drill control system includes an uphole control device and a downhole control device. The uphole control device is configured to transmit a reference trajectory to the downhole 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 from 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.

主权项

1. A drill control system comprising:
an uphole control device; and a downhole control device; wherein the uphole control device is configured to:
transmit a reference trajectory to the downhole control device;receive information about an actual trajectory from the downhole control device; andtransmit control signals to the downhole control device to control rotational speed of a drill bit based on information received from the downhole control device; and wherein the downhole control device is configured to:
receive the reference trajectory from the uphole control device;correct deviations between the reference trajectory and the actual trajectory; andtransmit information about the actual trajectory to the uphole control device, wherein the uphole control device implements an uphole control loop and the downhole control device implements a downhole control loop, the uphole control loop having larger sampling intervals than the downhole control loop while monitoring the performance of the downhole control loop to facilitate drilling to a defined target.