Patent ID: 6840323

Claim:
In a subsea well assembly having a tubular member located subsea at an upper end of the well, a tubing hanger landed in the tubular member, the tubing hanger connected to a string of tubing extending into the well, the tubing hanger having a production passage for flowing production fluid from the well, the tubing hanger having a tubing annulus passage in communication with a tubing annulus surrounding the tubing, the improvement comprises: a tubing annulus valve located in the tubing annulus passage, the tubing annulus valve having an axially movable member adapted to be moved from a upper closed position to an open position; a retention device for retaining the movable member in the closed position while test pressure from above the movable member is applied to the tubing annulus passage from an exterior source; and an engaging tool mounted exterior of the tubing hanger that selectively releases the retention device and moves the movable member from the closed position to the open position.