Self-Aligning Rod Seal
AssigneeNational Oilwell Varco, L.P.
InventorsRussell Alan Rogers, Christopher Lee Cackler
Life of this patent
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Abstract
A seal assembly for providing a seal around a non-stationary rod includes a seal housing with a hollow body with first and second ends. The first end has a first opening to allow the non-stationary rod to pass therethrough and the second end has a second opening to allow the non-stationary rod to pass therethrough. A seal cartridge is disposed within the seal housing and radially moveable within the seal housing. A rod seal is disposed in an internal diameter of the seal cartridge.
Claims19
A seal assembly for providing a seal around a non-stationary rod, the seal assembly comprising:
- a seal housing comprising a hollow body with first and second ends, wherein the first end comprises a first opening to allow the non-stationary rod to pass therethrough and the second end comprises a second opening to allow the non-stationary rod to pass therethrough;
- a seal cartridge disposed within the seal housing and radially moveable within the seal housing;
- and
- a rod seal disposed in an internal diameter of the seal cartridge.
A reciprocating pump, comprising:
- a power end comprising a reciprocating crosshead converting rotational motion from a rotating shaft to a reciprocal motion;
- a fluid end comprising a fluid inlet, a fluid outlet, and a piston;
- a pony rod extending from the reciprocating crosshead to the piston;
- a partition between the reciprocating crosshead and the fluid end, wherein the partition comprises an opening through which the pony rod extends;
- and
- a seal assembly disposed at the opening in the partition and providing a seal between the pony rod and the opening in the partition through which the pony rod extends, wherein the seal assembly comprises,
- a seal housing comprising a hollow body with first and second ends, wherein the first end comprises a first opening to allow the reciprocating rod to pass therethrough and the second end comprises a second opening to allow the reciprocating rod to pass therethrough;
- a seal cartridge disposed within the seal housing and radially moveable within the seal housing;
- and
- a rod seal disposed in an internal diameter of the seal cartridge.
Dependencies are inferred from the claim text.