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US 12,560,061 B2Granted
Pump having hollow rotor disposed in stator
AssigneeSchlumberger Technology Corporation
InventorBenigno Segundo Montilla Jimenez
Life of this patent
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Abstract
A system includes an electric submersible progressive cavity pump (ESPCP). The ESPCP includes a stator having an internal bore, and a hollow rotor disposed in the internal bore of the stator, where the hollow rotor is configured to rotate within the internal bore to pump a fluid via a plurality of progressive cavities.
Claims18
A system, comprising:
- an electric submersible progressive cavity pump (ESPCP), comprising:
- a stator having an internal bore;
- and
- a hollow rotor disposed in the internal bore of the stator, wherein the hollow rotor is configured to rotate within the internal bore to pump a fluid via a plurality of progressive cavities, wherein the hollow rotor includes an outer shell, the outer shell having a thickness between a helical-shaped outer wall and an inner wall, the inner wall defining an interior space filled with an inert gas and sealed to prevent ingress of fluid into the interior space.
1 more element
A method, comprising:
- operating an electric submersible progressive cavity pump (ESPCP), wherein the ESPCP comprises a stator having an internal bore and a hollow rotor disposed in the internal bore of the stator, wherein the hollow rotor includes an outer shell, the outer shell having a thickness between a helical-shaped outer wall and an inner wall, the inner wall defining an interior space filled with an inert gas and sealed to prevent ingress of fluid into the interior space;
- and
- controlling the ESPCP over an operating range between a lower rotational speed to an upper rotational speed of the hollow rotor rotating within the internal bore of the stator, wherein the upper rotational speed is equal to or greater than 1000 RPM.
A method, comprising:
- assembling a hollow rotor of an electric submersible progressive cavity pump (ESPCP), wherein the hollow rotor includes an outer shell, the outer shell having a thickness between a helical-shaped outer wall and an inner wall, the inner wall defining an interior space filled with an inert gas and sealed to prevent ingress of fluid into the interior space;
- and
- installing the hollow rotor within an internal bore of a stator of the ESPCP, wherein the hollow rotor is configured to rotate within the internal bore to pump a fluid via a plurality of progressive cavities.
Dependencies are inferred from the claim text.