Roller screw actuator for subsea choke or module
AssigneeCooper Cameron Corporation
InventorsJohnny E. Newport, Todd J. Mosley
Life of this patent
Estimating the term…
Abstract
An actuator for use with a subsea choke or similar apparatus is disclosed. The actuator uses a planetary roller screw mechanism to allow greater control of the torque output while allowing a fast closing of the choke when well conditions require so. A handle is positioned on one end of the actuator housing for manipulation of the actuator housing by a remotely operated vehicle, when required. A pressure responsive axially reciprocable piston is positioned around the driven shaft and controls movement thereof. Other embodiments show the actuator controlling the position of the cage in a cage type choke. A final embodiment shows the actuator configured for use on a subsea tree.
Claims15
A roller screw actuator for a subsea choke or module, said actuator comprising:
- an actuator housing;
- a driven member, said driven member centrally disposed in said actuator housing and supported therein by support assemblies;
- said driven member includes a central driven shaft;
- and,
- a pressure responsive driving member coupled to said driven member, whereby axial movement of said pressure responsive driving member imparts rotational movement to said driven member said pressure responsive driving member includes an axially reciprocable piston formed thereon;
- said pressure responsive driving member includes a plurality of spindle shafts disposed circumferentially around said central driven shaft;
- said plurality of spindle shafts are helically threaded and in threaded engagement with a complementary helical thread on said central driven shaft;
- and, an anti-rotation means disposed between said pressure responsive driving member and said actuator housing to prevent rotation of said pressure responsive driving member as it is reciprocated.
A roller screw actuator in combination with a subsea choke, said combination comprising:
- a subsea choke having an inlet, an outlet and a axially moveable flow restricting member therebetween to regulate flow;
- an actuator housing secured to said subsea choke;
- a driven member, said driven member centrally disposed in said actuator housing and supported therein by support assemblies;
- a pressure responsive driving member coupled to said driven member whereby axial movement of said pressure responsive driving member imparts rotational movement to said driven member;
- said rotational movement of said driven member cooperating with a stem on said subsea choke flow restricting member to control axial movement and positioning of said flow restricting member;
- and,
- an adapter positioned on one end of said actuator housing for manipulation of said driven member said pressure responsive driving member is an axially reciprocable piston;
- said driven member includes a central driven shaft;
- said pressure responsive driving member includes a plurality of spindle shafts disposed circumferentially around said central driven shaft;
- said plurality of spindle shafts are helically threaded and in threaded engagement with a complementary helical thread on said central driven shaft;
- and, an anti-rotation means disposed between said pressure responsive driving member and said actuator housing to prevent rotation of said pressure responsive driving member as it is reciprocated.
A roller screw actuator for actuating a subsea choke on a subsea tree, comprising:
- a mounting plate with a guide pin affixed thereto;
- an actuator housing positioned on said mounting plate;
- a driven member, said driven member centrally disposed in said actuator housing and supported therein by support assemblies;
- a pressure responsive driving member coupled to said driven member whereby axial movement of said pressure responsive driving member imparts rotational movement to said driven member;
- an adapter positioned on one end of said actuator housing for manipulation of said driven member housing;
- and,
- a plurality of anti-rotation keys positioned on the opposite end of said actuator said pressure responsive driving member is an axially reciprocable piston;
- said driven member includes a central driven shaft;
- said pressure responsive driving member includes a plurality of spindle shafts disposed circumferentially around said central driven shaft;
- said plurality of spindle shafts are helically threaded and in threaded engagement with a complementary helical thread on said central driven shaft;
- and, an anti-rotation means disposed between said pressure responsive driving member and said actuator housing to prevent rotation of said pressure responsive driving member as it is reciprocated.
Dependencies are inferred from the claim text.