Subsea pressure reduction system

摘要

A system for reducing pressure in a subsea operator. In one embodiment, a subsea system includes an operator and a deintensifier. The operator includes a housing and a piston. The piston is movably disposed within the operator housing and divides an inner volume of the operator housing into a closing chamber and a second chamber. The deintensifier is fluidically coupled to the operator. The deintensifier includes a housing and a piston. The piston includes a closing surface and an opening surface. The closing surface is fluidically coupled to the second chamber of the operator housing. The opening surface is fluidically coupled to ambient pressure. The area of the closing surface is greater than an area of the opening surface so as to increase the pressure differential between the closing chamber and the second chamber and assist in moving the operator piston to the closed position.

主权项

1. A subsea blowout preventer (BOP), comprising:
a ram; an operator configured to operate the ram; and a deintensifier in fluid communication with the operator and configured to reduce a pressure of fluid needed to close the ram, the deintensifier comprising:
a fluid connection to the operator;a housing;a piston movably disposed within and sealingly engaging an inner surface of the housing;wherein a first surface of the piston is in fluid communication with the operator, and a second surface of the piston is in fluid communication with ambient subsea pressure; andwherein an area of the first surface is greater than an area of the second surface and the deintensifier is configured to reduce the fluid pressure needed to close the ram based on a ratio of the area of the second surface to the area of the first surface.