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1. (WO2018106577) METHODS AND SYSTEMS FOR DRILLING BOREHOLES IN EARTH FORMATIONS

Pub. No.:    WO/2018/106577    International Application No.:    PCT/US2017/064454
Publication Date: Fri Jun 15 01:59:59 CEST 2018 International Filing Date: Tue Dec 05 00:59:59 CET 2017
IPC: E21B 44/00
E21B 41/00
E21B 10/00
Applicants: BAKER HUGHES INCORPORATED
BP EXPLORATION OPERATING COMPANY LIMITED
Inventors: CURRY, David A.
PESSIER, Rudolf Carl
SPENCER, Reed W.
KUESTERS, Andrew
WINGATE, John
Title: METHODS AND SYSTEMS FOR DRILLING BOREHOLES IN EARTH FORMATIONS
Abstract:
Methods of drilling earth formations may involve removing a portion of an underlying earth formation utilizing cutting elements of an earth-boring drill bit. A rotational speed of the drill string may be sensed utilizing a first sensor. A rate of penetration of the drill string during advancement of the earth-boring drill bit may be sensed utilizing a second sensor. An instantaneous average depth of cut of cutting elements of the earth-boring drill bit may be determined utilizing a control unit to calculate the instantaneous average depth of cut based on a sensed rotational speed of the drill string and a sensed speed of advancement of the drill string. The weight on the earth-boring drill bit may be increased utilizing the drawworks when the instantaneous average depth of cut is less than the predetermined minimum depth of cut.