Methods and systems for drilling
AssigneeShell Oil Company
InventorsDavid Alston EDBURY, Jose Victor GUERRERO, Duncan Charles MACDONALD, James Bryon ROGERS, Donald Ray SITTON
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Abstract
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.
Claims11
A method of automatically picking up a drill bit off the bottom of an opening in a subsurface formation, comprising:
- 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.
Dependencies are inferred from the claim text.