公开(公告)号：US20210325915A1

公开(公告)日：2021-10-21

申请号：US17365457

申请日：2021-07-01

Applicant: Hydril USA Distribution LLC

Inventor： Michael James Connor ,  Alexander McAuley ,  David Kindt ,  Zachary Stewart

IPC: G05D16/02 ,  E21B33/064 ,  E21B34/16 ,  F16K11/07 ,  F16K31/122 ,  E21B33/06 ,  F16K31/124

Abstract: A method of reducing hydraulic shock in a BOP system including a pressure regulator having an input port and an output port, and a regulator piston 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. 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.