Drilling control system and method

摘要

A method of operating a drill string includes receiving signals indicative of rotation of a bottom hole assembly (BHA) of the drill string; receiving signals indicative of the torque experience by the BHA; determining from the received signals an average slipping torque and a maximum sticking torque; determining a friction ratio based on the maximum sticking torque and the average slipping torque; and generating an indication that the friction ratio exceeds a limit.

主权项

1. A computer-based method of operating a drill string including a drill bit, the method comprising:
measuring rotation of and torque experienced by a bottom hole assembly (BHA) of the drill string at the BHA; receiving, at a computing device located at a surface location, signals indicative of the measured rotation and torque from the BHA; determining from the received signals an average slipping torque and a maximum sticking torque, the signals indicative of torque being created at the drill bit; determining a friction ratio that is equal to the maximum sticking torque divided by the average slipping torque; and adjusting one or more operating parameters of the drill string to maintain the friction ratio below a predetermined limit.