Valve wedge trim
AssigneeCameron International Corporation
InventorEdmund McHugh
Life of this patent
Estimating the term…
Abstract
A choke is provided. The choke includes a trim that includes, in one embodiment, a wedge-shaped member (“wedge”) and a cage with an opening for receiving the wedge. The wedge includes a first surface and a second surface that is angled with respect to the first surface. As the wedge is positioned into the opening of the cage, the space between the second surface and a third surface inside the opening forms a throttling orifice that restricts the flow of fluid. The size of the throttling orifice is variable depending on the position of the wedge relative to the cage. In another embodiment, the trim provides a positive shut-off point that is separate from the throttling area. Additional systems, devices, and methods are also disclosed.
Claims22
An apparatus comprising:
- a wedge-shaped member of a valve, the wedge-shaped member having a first surface and a second surface that is angled with respect to the first surface;
- and
- a cage of the valve, the cage having a main body that includes an opening that extends through the main body, the opening being formed by at least a third surface and a fourth surface of the cage and being configured to receive the wedge-shaped member such that a throttling orifice is formed as a space between the second surface and the fourth surface.
A system comprising:
- a wedge-shaped component;
- a stem coupled to the wedge-shaped component;
- an actuator configured to move the stem to vary the position of the wedge-shaped component;
- and
- a cage disposed in a passage of the system, wherein the cage includes a substantially cylindrical body with a first end proximal to the stem and a second end distal to the stem and an opening that extends through the body;
- wherein the actuator is configured to at least partially restrict the flow of a fluid through the passage by positioning the wedge-shaped component into the opening such that a throttling orifice is formed between a first surface of the wedge-shaped component and a second surface inside the opening, and to fully impede the flow of the fluid through the passage by moving the stem such that a surface of the stem fully contacts a seal disposed on the first end of the body of the cage.
A trim for use in a flow control device comprising:
- a generally wedge-shaped member comprising a first surface and a second surface, wherein the first surface is angled with respect to the second surface;
- a cage having an opening to receive the wedge-shaped member;
- and
- an actuator configured to control the position of the wedge-shaped member relative to the cage;
- wherein a throttling orifice is formed between the first surface of the wedge-shaped portion and a third surface inside the opening when the wedge-shaped portion is at least partially positioned into the opening, wherein the first surface comprises a first set of segments that are each substantially parallel with respect to the second surface and a second set of segments that are each angled with respect to the second surface, wherein the first and second sets of segments are arranged in an alternating manner along the first surface such that each of the first set of segments and a directly adjacent one of the second set of segments forms a step-like feature on the first surface.
Dependencies are inferred from the claim text.