Valve seat with ceramic insert
AssigneeSPM Oil & Gas Inc.
InventorsConnor James Docherty, Ralph E. Harris
Life of this patent
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Abstract
A valve seat for a valve assembly for a high-pressure fluid pump is disclosed. The valve assembly includes a valve body, and a valve seat fabricated of a first material. The valve seat has a generally a tubular body having an annular collar having an outer diameter surface extending beyond the outer diameter surface of the tubular body, and an annular insert fabricated of a second material more durable than the first material and affixed to form an inner diameter surface of the collar, the insert forming an annular sealing surface against which the valve body abuts when in a closed position. The insert forms an annular ledge edge at its inner diameter surface that is offset from the inner diameter surface of the tubular body to form an annular chamfered edge.
Claims20
A valve assembly for a high-pressure fluid pump, comprising:
- a valve body;
- and
- a valve seat fabricated of a first material and including:
- a tubular body having an inner diameter surface and an outer diameter surface;
- an annular sealing member disposed within an annular groove formed in the outer diameter surface of the tubular body,
- the tubular body having an annular collar having an outer diameter surface extending beyond the outer diameter surface of the tubular body;
- and
- an insert fabricated of a second material more durable than the first material and affixed to form an inner diameter surface of the collar,
- the insert forming an annular sealing surface against which the valve body abuts when in a closed position,
- the insert having an inner diameter surface that is offset from the inner diameter surface of the tubular body to be adjacent to an annular chamfered edge of the valve seat, and
- the insert having a back face formed by a first side intersecting with the back face at an angle greater than 90 degrees and by a second side intersecting with the back face at an angle greater than 90 degrees.
A valve seat for a valve in a high-pressure fluid pump, comprising:
- a tubular body fabricated of a first material and having an inner diameter surface and an outer diameter surface;
- the tubular body having an annular collar having an outer diameter surface extending beyond the outer diameter surface of the tubular body;
- and
- an insert fabricated of a second material more durable than the first material and affixed to form an inner diameter surface of the collar,
- the insert configured to form an annular sealing surface against which the valve body abuts when in a closed position,
- the insert having an inner diameter surface that is offset from the inner diameter surface of the tubular body to be adjacent to an annular chamfered edge of the valve seat, and
- the insert having a back face formed by a first side intersecting with the back face at an angle greater than 90 degrees and by a second side intersecting with the back face at an angle greater than 90 degrees.
A valve assembly for a high-pressure fluid pump, comprising:
- a valve body;
- and
- a valve seat fabricated of a first material and including:
- a tubular body having an inner diameter surface and an outer diameter surface;
- the tubular body having an annular collar having an outer diameter surface extending beyond the outer diameter surface of the tubular body;
- and
- an insert fabricated of a second material more durable than the first material and affixed to form an inner diameter surface of the collar and forming an annular sealing surface against which the valve body abuts when in a closed position,
- the insert having an inner diameter surface that is offset from the inner diameter surface of the tubular body to be adjacent to an annular chamfered edge of the valve seat, and
- the insert having a back face formed by a first side intersecting with the back face at an angle greater than 90 degrees and by a second side intersecting with the back face at an angle greater than 90 degrees.
Dependencies are inferred from the claim text.