Two-pin clapper check valve
AssigneeSPM Oil & Gas Inc.
InventorsNadiya V. Fuller, Brian C. Witkowski
Life of this patent
Estimating the term…
Abstract
In some implementations, a clapper valve assembly includes a valve body defining a longitudinal flow bore, a hanger disposed in the valve body, a link piece coupled to the hanger, a first pin coupled between the hanger and the link piece, wherein the link piece is configured to rotate, relative to the hanger, about the first pin, a clapper coupled to the link piece, and a second pin coupled between the link piece and the clapper, wherein the clapper is configured to rotate, relative to the link piece, about the second pin.
Claims18
A clapper valve assembly, comprising:
- a valve body defining a longitudinal flow bore;
- a hanger disposed in the valve body and including a slot;
- a link piece, including:
- a link body;
- and
- first and second pin holes defined in the link body;
- a first pin disposed in both the slot of the hanger and the first pin hole of the link body,
- wherein the first pin defines a first rotation axis, and
- wherein the link piece is configured to rotate about the first rotation axis;
- a clapper, including:
- a clapper body;
- a third pin hole defined in the clapper body;
- and
- a seal;
- a second pin disposed in both the second pin hole of the link body and the third pin hole of the clapper body,
- wherein the second pin defines a second rotation axis,
- wherein the clapper is configured to rotate about the second rotation axis, and
- wherein a fit between the first pin and the slot of the hanger has greater clearance than a fit between the second pin and the third pin hole of the clapper body;
- and
- a valve seat disposed in the valve body.
A link assembly for coupling a clapper to a hanger of a clapper valve, comprising:
- a link piece, including:
- a link body;
- and
- first and second pin holes defined in the link body, wherein the link body includes:
- a first end corresponding to the first pin hole,
- wherein the link body has a first width and a first depth at the first end;
- and
- a second end corresponding to the second pin hole,
- wherein the link body has a second width and a second depth at the second end,
- wherein the second width is less than the first width, and
- wherein the second depth is less than the first depth;
- a first pin disposed in the first pin hole of the link body,
- wherein the first pin defines a first rotation axis, and
- wherein the link piece is configured to rotate, relative to the hanger, about the first rotation axis;
- and
- a second pin disposed in the second pin hole of the link body,
- wherein the second pin defines a second rotation axis, and
- wherein the clapper is configured to rotate, independently of the link piece, about the second rotation axis.
A clapper valve assembly, comprising:
- a valve body defining a longitudinal flow bore;
- a hanger disposed in the valve body and including a slot;
- a link piece coupled to the hanger;
- a first pin coupled between the hanger and the link piece,
- wherein the link piece is configured to rotate, relative to the hanger, about the first pin;
- a clapper coupled to the link piece;
- and
- a second pin coupled between the link piece and the clapper,
- wherein the clapper is configured to rotate, relative to the link piece, about the second pin, and
- wherein a fit between the first pin and the slot of the hanger has greater clearance than a fit between the second pin and a pin hole of the clapper.
Dependencies are inferred from the claim text.