Particle guard ring for mixed flow pump
AssigneeSchlumberger Technology Corporation
InventorsKean Wee Cheah, David Milton Eslinger
Life of this patent
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Abstract
A mixed-flow impeller for an electric submersible pump can include a lower end and an upper end; a hub that includes a through bore that defines an axis; blades that extend at least in part radially outward from the hub where each of the blades includes a leading edge and a trailing edge; an upper balance ring that includes a radially inward facing balance chamber surface and a radially outward facing diffuser clearance surface; and an upper guard ring disposed radially outwardly from the upper balance ring where the upper guard ring includes an axially facing diffuser clearance surface that is disposed axially between the trailing edges of the blades and the upper end.
Claims14
A mixed-flow impeller for an electric submersible pump, the mixed flow impeller comprising:
- a lower end and an upper end;
- a hub that comprises a through bore that defines an axis;
- a lower shroud ring that extends to a shroud wall;
- blades that extend at least in part radially outward from the hub to the shroud wall wherein each of the blades comprises a leading edge and a trailing edge;
- a lower balance ring that comprises a radially inward facing chamber surface and a radially outward facing diffuser clearance surface;
- and
- a lower guard ring disposed radially outwardly from the lower shroud ring and the lower balance ring, wherein the lower guard ring comprises an axially facing diffuser clearance surface that is disposed axially between the leading edges of the blades and the lower end.
A mixed-flow impeller for an electric submersible pump, the mixed flow impeller comprising:
- a lower end and an upper end;
- a hub that comprises a through bore that defines an axis;
- a lower shroud ring that extends to a shroud wall;
- blades that extend at least in part radially outward from the hub to the shroud wall wherein each of the blades comprises a leading edge and a trailing edge;
- a lower balance ring disposed radially outwardly from and extending axially parallel to the lower shroud ring;
- and
- a lower guard ring disposed radially outwardly from and extending axially parallel to the lower balance ring.
Dependencies are inferred from the claim text.