Patent ID: 11933108
Assignee: BLACK DIAMOND OILFIELD RENTALS LLC
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 15:
16. A method of using a downhole device as a selectable hole trimmer comprising:
providing a drill bit a flow of drilling fluids in the drill string, wherein the flow of drilling fluids returns in an annulus;
determining whether a trigger condition has been satisfied;
upon determining the trigger condition has been satisfied, opening a valve in a control system to pressurize a volume;
at least partially pressurizing an activation port to a selectable hole cutter of a body; and
directing a portion of the flow of drilling fluids through the activation port to the selectable hole cutter to activate the cutter piston;
wherein determining the trigger condition being satisfied comprises comparing a pressure of the drilling fluids inside the drill string and a pressure of the drilling fluids in the annulus outside the drill string to ascertain a pressure difference; and
wherein comparing the pressure of the drill fluids inside the drill string and the pressure of the drilling fluids in the annulus outside the drill string comprises receiving the drilling fluids inside the drill string in an accumulator or pressure compensator and receiving the drilling fluids in the annulus in another accumulator or pressure compensator.