Dynamic annular pressure control apparatus and method
March 22, 2007
A portion of the mud flow from the primary mud pump is diverted to the mud discharge outlet, thereby creating a backpressure system.
Offshore staff
Pub. Number: US7185719 Appl. Data: 10 20040210 Applicant: Shell Oil Company Inventor: van Riet, Egbert Jan Title: Dynamic annular pressure control apparatus and method A drilling system for drilling a bore hole into a subterranean earth formation, wherein at least a portion of the mud flow from the primary mud pump is diverted to the mud discharge outlet, thereby creating a backpressure system to readily increase annular pressure.
