Patent ID: 7770650
Filing Date: 2010-08-10
Classification: E21B

Abstract:
1. A subsea wellhead assembly, comprising: a production tree having a bore therethrough and a production outlet extending laterally from the bore to an exterior of the tree; a tubing hanger landed in the bore for supporting a string of tubing extending into the well, the tubing hanger having a laterally extending production passage; an orientation guide carried by the tubing hanger; a retractable pin mounted in the sidewall of the tree, the pin being movable from an outward retracted position to an inward extended position protruding into the bore of the tree for engaging the orientation guide to orient the production passage of the tubing hanger with the production outlet as the tubing hanger lands in the bore; a cavity extending into the side wall of the tree from the bore; a piston on the pin that is carried sealingly in the cavity, the pin extending inward from the piston, the piston defining an inward facing shoulder; a spring within the cavity, having an inner end secured to the sidewall of the tree and an outer end in engagement with the inward facing shoulder of the piston for urging the piston and the pin to the outward retracted position; a hydraulic fluid passage leading to the cavity on an outward side of the piston for supplying hydraulic fluid pressure to move the piston and the pin to the extended position; and wherein the spring is positioned to be immersed in fluid in the bore of the tree.