| 摘要 |
Production equipment for use in a wellbore comprises a pump 450 and a valve 400 disposed in the wellbore. The valve comprises a body 410 having a spring or biasing member 460 and a sealing member 470 configured to axially move inside the body against the first spring to provide a path for fluid to flow from an interior region to an exterior region of the body at a first predetermined pressure difference across the sealing member. The spring is disposed in a chamber of the body, and the chamber is in fluid communication with an inlet of a pump, which may be an electric submersible pump (ESP). The valve may comprise a bypass mechanism comprising a sleeve 430, shear pin 435 and lower port 418 for use when the sealing member becomes inoperational. |
