Double Valve Block and Actuator Assembly Including Same

摘要

A valve comprises a housing including a first chamber, a second chamber, and a neutral chamber. In addition, the valve comprises a stem disposed within the housing. Further, the valve comprises a first valve member at least partially disposed in the first chamber and connected to the stem and a second valve member at least partially disposed in the second chamber and connected to the stem. The first valve member has a closed position seated in a first annular valve seat and an open position spaced apart from the first valve seat. The second valve member has a closed position seated in a second annular valve seat and an open position spaced apart from the second valve seat. Moreover, the valve comprises a biasing member configured to bias the second valve member to the closed position and the first valve member to the open position.

主权项

1. A system for drilling a subsea wellbore, the system comprising:
a blowout preventor comprising a main bore and a pair of opposed rams, each ram having an open position withdrawn from the main bore and a closed position extending into the main bore; and a valve configured to facilitate actuation of the rams, the valve comprising:
a housing having a longitudinal axis and including a first chamber, a second chamber, and a neutral chamber positioned axially between the first chamber and the second chamber;a first valve member at least partially disposed in the first chamber, wherein the first valve member has a closed position seated in a first annular valve seat and an open position spaced apart from the first valve seat; anda second valve member at least partially disposed in the second chamber, wherein the second valve member has a closed position seated in a second annular valve seat and an open position spaced apart from the second valve seat.