SUBSEA BOP PRESSURE REGULATOR FOR FLUID HAMMER EFFECT REDUCTION

摘要

A method of reducing hydraulic shock in a BOP system including a pressure regulator 10 having an input port 31 and an output port 28, and a regulator piston 26 that moves between an open and a closed position based on a change in hydraulic pressure applied to the regulator piston via a pilot port 47. The method includes initiating a function, and monitoring the state of the function as it is carried out to predict when the function nears the end of its cycle. The method also includes, when the function reaches a predetermined state, adjusting the hydraulic pressure on the regulator piston via the pilot port to gradually move the regulator piston between the open to the closed position to reduce fluid flow through the fluid path in a controlled manner to reduce hydraulic shock.