Patent ID: 7798233
Filing Date: 2010-09-21
Classification: B63B

Abstract:
1. A method for preventing overpressure in a production flowline, the method comprising the steps of: a) locating a turret buoy held between a plurality of risers, wherein the risers are supported by riser buoys without aid of the turret buoy and the risers are positioned about the turret buoy so that the turret buoy is horizontally balanced between the riser buoys while disconnected from a floating vessel; b) producing hydrocarbons through a production flowline within the turret buoy connected to a swivel, the hydrocarbons having a hydrostatic pressure; c) sensing the pressure within the production flowline; and d) actuating a shut down valve on the production flowline in response to the sensed pressure; wherein the shut down valve is positioned within the turret buoy and the pressure is sensed downstream of the shut down valve.