Scraper ring assembly
AssigneeGd Energy Products, LLC
InventorJohn Chase
Life of this patent
Estimating the term…
Abstract
An annular scraper ring assembly for a packing arrangement is disclosed. The annular scraper ring assembly can form a seal with a plunger included in a fluid end of a reciprocating pump and includes two or more rings, including a first ring and a second ring. The first ring is formed from a resilient material configured to form a seal against a plunger included in a fluid end of a reciprocating pump and includes an upstream face and an inner surface. The second ring defines a caroming surface configured to engage the upstream face of the first ring and cam the inner surface inwards when the first ring is compressed against the second ring.
Claims20
A packing arrangement for a fluid end of a reciprocating pump, the packing arrangement being installable within a packing box disposed at the fluid end and being arranged to form a seal with a plunger of the reciprocating pump, the packing arrangement comprising:
- one or more pressure rings;
- and
- a scraper ring assembly disposed upstream of the one or more pressure rings, the scraper ring assembly comprising two or more rings, the two or more rings including:
- a first ring formed from a resilient material configured to form the seal against the plunger, the first ring including an upstream face and an inner surface, wherein the upstream face and the inner surface cooperatively form a sharp leading edge of the first ring;
- and
- a second ring defining a camming surface configured to engage the upstream face of the first ring and urge the inner surface of the first ring inwards during compression of the first ring and the second ring against one another,
- wherein the sharp leading edge of the first ring is configured to be positioned inwardly beyond the second ring.
An annular scraper ring assembly for a packing arrangement that can form a seal with a plunger included in a fluid end of a reciprocating pump, comprising:
- two or more rings, including:
- a first ring formed from a resilient material configured to form the seal against the plunger included in the fluid end of the reciprocating pump, the first ring including an upstream face and an inner surface, wherein the upstream face and the inner surface cooperatively form a sharp leading edge of the first ring;
- and
- a second ring defining a camming surface configured to engage the upstream face of the first ring and urge the inner surface of the first ring inwards during compression of the first ring and the second ring against one another,
- wherein the sharp leading edge of the first ring is configured to be positioned inwardly beyond the second ring.
A reciprocating pump, comprising:
- a casing defining a pumping chamber;
- a plunger configured to reciprocate in an axial direction within the pumping chamber;
- and
- an annular scraper ring assembly that can form a seal with the plunger, the annular scraper ring assembly comprising two or more rings, including:
- a first ring formed from a resilient material configured to form the seal against the plunger, the first ring including an upstream face and an inner surface, wherein the upstream face and the inner surface cooperatively form a sharp leading edge of the first ring;
- and
- a second ring defining a camming surface configured to engage the upstream face of the first ring and urge the inner surface of the first ring inwards during compression of the first ring and the second ring against one another,
- wherein the sharp leading edge of the first ring is configured to be positioned inwardly beyond the second ring.
Dependencies are inferred from the claim text.