A subsea electric actuator comprises an electric motor and a telescopic drive connection (8) from the motor to a drive unit (10 11 12) which can be moved to and fro and converts rotary motion of the connection to linear motion of an actuating stem (5). A return spring (14) is operable on the drive unit to urge the a...

A hydraulic valve comprises a plurality of ports, which communicate with a passageway (5), and a valve member (8) movable in the passageway to control the communication between the ports. The valve member carries a lateral shear seal (13) which is integral with the valve member and engages the passageway. In one pos...

An electrically operated hydraulic valve comprises a valve assembly that provides a common valve passageway, an inlet port (20), an outlet port (22) and a return port (23) connected to the passageway and an axially movable valve device (8, 15; 33) which allows in a first position fluid flow between the outlet port a...

A cap for a subsea tree having a re-entry hub (1) and for use with a tubing hanger (25) deployed within the tree comprises an outer sleeve (3) for fitment over the hub and an inner sleeve (19) adapted to extend within the hub. The sleeve has communication couplers (27, 37) for cooperation with the tubing han...