Patent ID: 9428982
Filing Date: 2016-08-30
CPC Classification: E21B,F15B,F16K,Y10T

Claim Text:
1. A valve for controlling the flow of a fluid in a subsea assembly, comprising: a housing comprising 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; an elongate stem slidable within the housing and extending axially through the neutral chamber, the stem comprising a first end and a second end opposite the first end; a first valve member at least partially located in the first chamber and connected to the first end of the stem, wherein the first valve member has a closed position seated in a first annular valve seat positioned axially between the first chamber and the neutral chamber and an open position spaced apart from the first valve seat; a second valve member at least partially located in the second chamber and connected to the second end of the stem, wherein the second valve member has a closed position seated in a second annular valve seat positioned axially between the second chamber and the neutral chamber and an open position spaced apart from the second valve seat; and a biasing member positionable in at least one of the first chamber, the second chamber, and the neutral chamber, the biasing member being configured to bias at least one of the first valve member and the second valve member.