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US 12,603,546 B2Granted
Canned motor for electric submersible pump
AssigneeSchlumberger Technology Corporation
InventorsRaju Ekambaram, You Cheng Jee, Stanislav Konstantinovich Ivanov, Maxim Y. Radov
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Abstract
A canned motor for a submersible pump system and a method of manufacturing the canned motor are provided. The canned motor includes: a canned stator comprising a can disposed within a central bore of a lamination stack, wherein an inner diameter of the can comprises at least one keyway; and a rotor bearing comprising at least one key configured to engage the keyway of the can when a shaft and rotor sub-assembly is disposed within the canned stator.
Claims21
A motor for a submersible pumping system, the motor comprising:
- a housing;
- a canned stator comprising:
- a lamination stack and stator windings, the lamination stack including:
- a central bore defined by an inner surface;
- and
- a lamination stack keyway disposed in the inner surface of the lamination stack;
- and
- a can including:
- an outer surface;
- and
- an inner surface defining a bore, wherein the can is disposed within the central bore of the lamination stack and is disposed adjacent to the inner surface of the lamination stack, and wherein the inner surface of the can comprises at least one can keyway radially aligned with the lamination stack keyway;
- and
- a shaft and rotor sub-assembly comprising:
- at least one rotor bearing including:
- a rotor bearing carrier including:
- an outer surface;
- and
- an inner surface defining a carrier bore, wherein the rotor bearing carrier is disposed within the bore of the can, and wherein the rotor bearing carrier includes a rotor bearing key disposed in a recess in the outer surface of the rotor bearing carrier, and wherein the rotor bearing key disposed in the can keyway;
- a rotor bearing bushing including an inner surface defining a bushing bore, the rotor bearing bushing is disposed within the carrier bore, wherein the rotor bearing bushing includes a bushing anti-rotation key configured to rotationally fix the rotor bearing bushing to the carrier;
- and
- a bearing sleeve including an inner surface defining a sleeve bore, wherein the bearing sleeve is disposed within the bushing bore;
- and
- a shaft disposed within the sleeve bore, wherein the shaft is keyed to the bearing sleeve by a shaft key.
20 more elements
A method of manufacturing a motor for a submersible pumping system, the method comprising:
- inserting a can into a central bore of a stator, wherein:
- the stator comprising a lamination stack disposed within a housing;
- the lamination stack includes an inner surface and a lamination stack keyway disposed in the inner surface of the lamination stack;
- the inner surface of the lamination stack defines the central bore of the stator;
- the can includes:
- an outer surface;
- and
- an inner surface defining a bore;
- the inner surface of the can having a can keyway;
- and
- inserting the can into the central bore of the stator includes radially aligning the lamination stack keyway with the can keyway;
- and
- inserting a shaft and rotor sub-assembly into a central bore of the can, the shaft and rotor sub-assembly comprising at least one rotor disposed about the shaft and at least one rotor bearing disposed about the shaft, the at least one rotor bearing comprising:
- a rotor bearing carrier including an outer surface and an inner surface defining a carrier bore, the rotor bearing carrier disposed within the bore of the can, the rotor bearing carrier including a rotor bearing key disposed in a recess in the outer surface of the rotor bearing carrier, the rotor bearing key disposed in the can keyway;
- a rotor bearing bushing including an inner surface defining a bushing bore, the rotor bearing bushing disposed within the carrier bore, the rotor bearing bushing including a bushing anti-rotation key configured to rotationally fix the rotor bearing bushing to the carrier;
- and
- a bearing sleeve including an inner surface defining a sleeve bore, the bearing sleeve disposed within the bushing bore, wherein the shaft is disposed within the sleeve bore and adjacent to the inner surface of the bearing sleeve, wherein the shaft is keyed to the bearing sleeve by a shaft key.
14 more elements
Dependencies are inferred from the claim text.