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.
申请公布号
WO2012064944(A3)
申请公布日期
2013.01.17
申请号
WO2011US60167
申请日期
2011.11.10
申请人
BAKER HUGHES INCORPORATED;RECKMANN, HANNO;MEYER-HEYE, BERNHARD;LIPPERT, TRISTAN;HERBIG, CHRISTIAN
发明人
RECKMANN, HANNO;MEYER-HEYE, BERNHARD;LIPPERT, TRISTAN;HERBIG, CHRISTIAN