Connector for tying back a riser from a platform to a subsea wellhead housing has load transfer part of latch moving radially out to engage internal groove in wellhead

摘要

The connector (10) has an inner body (12), a housing (36) axially moveably carried on the inner body, and a latch (30) mounted for axial sliding movement on an inclined load shoulder (33) of the inner body. When in position inside the wellhead the inner body is movable relative to the housing to an upper position, causing the latch to slide radially outward so that it engages the inner groove of the wellhead. An upper lock member in the form of dogs (50) is carried by the housing, and maintains the inner body in the upper position. An Independent claim is included for a method of tying back a riser from a platform to the subsea wellhead. Preferred Features: The axial movement of the inner body may be provided by a cam sleeve (56) carried on the inner body, and a piston (68) which cooperates with the cam sleeve to define a hydraulic fluid chamber (74) adapted to receive hydraulic fluid pressure to stroke the cam sleeve axially. Preferably the latch comprises a number of latch fingers carried an the inner body, each having a load transferring portion in sliding arrangement with the load shoulder, and an upper end with an outer protruding portion that engages a recess (46) in the housing.