Methods and systems for drilling

摘要

A method of automatically picking up a drill bit off the bottom of an opening in a subsurface formation, comprises a) setting a predetermined level of differential pressure across a mud motor at which pickup of the drill bit is to be initiated; b) monitoring the differential pressure across the mud motor; c) allowing differential pressure across the mud motor to decrease to the predetermined level; and d) when the predetermined level is reached, automatically picking up the drill bit.