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US 12,523,131 B2Granted
Electric submersible pump with active cooling
AssigneeHalliburton Energy Services, Inc.
InventorsHassan Mansir, Andras Bencze
Life of this patent
Estimating the term…
Abstract
An electric submersible pump includes a heat exchanger, a shaft comprising an axial bore, and a motor, which includes a rotor rotationally coupled to the shaft, a stator concentrically disposed with respect to the rotor, and a journal bearing disposed between the stator and the shaft. There is a gap between the rotor and the stator. The electric submersible pump further includes a first pump mechanically coupled to the shaft and configured to pump production fluid through a tubular, and a second pump mechanically coupled to the shaft and configured to pump coolant through the axial bore, the gap, and the heat exchanger. The heat exchanger transfers heat from the coolant to the production fluid to cool the motor.
Claims24
An electric submersible pump, comprising:
- a heat exchanger;
- a shaft comprising an axial bore;
- a motor comprising:
- a rotor rotationally coupled to the shaft;
- a stator concentrically disposed with respect to the rotor, wherein a gap is formed between the rotor and the stator;
- and
- a journal bearing disposed between the stator and the shaft;
- a first pump mechanically coupled to the shaft and configured to pump production fluid through a production tubing;
- a second pump mechanically coupled to the shaft and configured to pump coolant through the axial bore, the gap, and the heat exchanger, wherein the heat exchanger is configured to transfer heat from the coolant to the production fluid;
- a pump discharge head configured to output the production fluid into the production tubing;
- a pump intake configured to intake the production fluid;
- a seal section configured to seal the motor from the production fluid;
- a downhole gauge configured to measure a parameter within a wellbore;
- a housing enclosing at least the motor;
- a first tubing disposed at least partially outside of the housing and configured to transfer the coolant from the motor to the heat exchanger;
- and
- a second tubing disposed at least partially outside of the housing and configured to transfer the coolant from the heat exchanger to the motor,
- wherein the heat exchanger is disposed between the pump discharge head and the first pump,
- wherein the first pump is disposed between the heat exchanger and the pump intake,
- wherein the pump intake is disposed between the first pump and the seal section,
- wherein the seal section is disposed between the pump intake and the motor, and
- wherein the motor is disposed between the seal section and the gauge.
19 more elements
A method of lifting fluid in a wellbore, comprising:
- running an electric submersible pump into a wellbore, the electric submersible pump comprising:
- a heat exchanger;
- a shaft comprising an axial bore;
- a motor comprising:
- a rotor rotationally coupled to the shaft;
- a stator concentrically disposed with respect to the rotor, wherein a gap is formed between the rotor and the stator;
- and
- a journal bearing disposed between the stator and the shaft;
- a first pump mechanically coupled to the shaft;
- a second pump mechanically coupled to the shaft;
- a pump discharge head configured to output the production fluid into a production tubing;
- a pump intake configured to intake the production fluid;
- a seal section configured to seal the motor from the production fluid;
- a downhole gauge configured to measure a parameter within a wellbore;
- a housing enclosing at least the motor;
- a first tubing disposed at least partially outside of the housing and configured to transfer the coolant from the motor to the heat exchanger;
- and
- a second tubing disposed at least partially outside of the housing and configured to transfer the coolant from the heat exchanger to the motor, wherein the heat exchanger is disposed between the pump discharge head and the first pump, wherein the first pump is disposed between the heat exchanger and the pump intake, wherein the pump intake is disposed between the first pump and the seal section, wherein the seal section is disposed between the pump intake and the motor, and wherein the motor is disposed between the seal section and the gauge;
- and
- providing electric power to the motor to rotate the shaft, wherein the rotating of the shaft causes the first pump to pump the production fluid through the production tubing and causes the second pump to pump coolant through the axial bore, the gap, and the heat exchanger such that the heat exchanger transfers heat from the coolant to the production fluid.
17 more elements
An electric submersible pump, comprising:
- a heat exchanger;
- a shaft comprising an axial bore;
- a motor comprising:
- a rotor rotationally coupled to the shaft;
- a stator concentrically disposed with respect to the rotor, wherein a gap is formed between the rotor and the stator;
- and
- a journal bearing disposed between the stator and the shaft;
- a first pump mechanically coupled to the shaft and configured to pump production fluid through a production tubing;
- a second pump mechanically coupled to the shaft and configured to pump coolant through the axial bore, the gap, and the heat exchanger, wherein the heat exchanger is configured to transfer heat from the coolant to the production fluid;
- a pump discharge head configured to output the production fluid into the production tubing;
- a pump intake configured to intake the production fluid;
- a seal section configured to seal the motor from the production fluid;
- a gauge configured to measure a parameter within a wellbore;
- a housing enclosing at least the motor;
- a first tubing disposed at least partially outside of the housing and configured to transfer the coolant from the motor to the heat exchanger;
- a second tubing disposed at least partially outside of the housing and configured to transfer the coolant from the heat exchanger to the motor;
- and
- a shroud encircling the heat exchanger,
- wherein the shroud is configured to at least partially obstruct an interior of a casing of the wellbore to direct the production fluid through or across the heat exchanger,
- wherein the first pump is disposed between the pump discharge head and the pump intake,
- wherein the pump intake is disposed between the first pump and the seal section,
- wherein the seal section is disposed between the pump intake and the motor,
- wherein the motor is disposed between the seal section and the heat exchanger, and
- wherein the heat exchanger is disposed between the motor and the gauge.
21 more elements
An electric submersible pump, comprising:
- a heat exchanger;
- a shaft comprising an axial bore;
- a motor comprising:
- a rotor rotationally coupled to the shaft;
- a stator concentrically disposed with respect to the rotor, wherein a gap is formed between the rotor and the stator;
- and
- a journal bearing disposed between the stator and the shaft;
- a first pump mechanically coupled to the shaft and configured to pump production fluid through a production tubing;
- a second pump mechanically coupled to the shaft and configured to pump coolant through the axial bore, the gap, and the heat exchanger, wherein the heat exchanger is configured to transfer heat from the coolant to the production fluid;
- a pump discharge head configured to output the production fluid into the production tubing;
- a pump intake configured to intake the production fluid;
- a seal section configured to seal the motor from the production fluid;
- a gauge configured to measure a parameter within a wellbore;
- a housing enclosing at least the motor and the heat exchanger;
- a first flow passageway disposed entirely within the housing and configured to transfer the coolant from the motor to the heat exchanger;
- a second flow passageway disposed entirely within the housing and configured to transfer the coolant from the heat exchanger to the motor;
- and
- a shroud encircling the heat exchanger,
- wherein the shroud is configured to at least partially obstruct an interior of a casing of the wellbore to direct the production fluid through or across the heat exchanger,
- wherein the first pump is disposed between the pump discharge head and the pump intake,
- wherein the pump intake is disposed between the first pump and the seal section,
- wherein the seal section is disposed between the pump intake and the motor,
- wherein the motor is disposed between the seal section and the heat exchanger, and
- wherein the heat exchanger is disposed between the motor and the gauge.
21 more elements
An electric submersible pump, comprising:
- a heat exchanger;
- a shaft comprising an axial bore;
- a motor comprising:
- a rotor rotationally coupled to the shaft;
- a stator concentrically disposed with respect to the rotor, wherein a gap is formed between the rotor and the stator;
- and
- a journal bearing disposed between the stator and the shaft;
- a first pump mechanically coupled to the shaft and configured to pump production fluid through a production tubing;
- a second pump mechanically coupled to the shaft and configured to pump coolant through the axial bore, the gap, and the heat exchanger, wherein the heat exchanger is configured to transfer heat from the coolant to the production fluid;
- a pump discharge head configured to output the production fluid into the production tubing;
- a pump intake configured to intake the production fluid;
- a seal section configured to seal the motor from the production fluid;
- a gauge configured to measure a parameter within a wellbore;
- a housing enclosing at least the motor;
- a first tubing disposed at least partially outside of the housing and configured to transfer the coolant from the motor to the heat exchanger;
- and
- a second tubing disposed at least partially outside of the housing and configured to transfer the coolant from the heat exchanger to the motor,
- wherein the first pump is disposed between the pump discharge head and the heat exchanger,
- wherein the heat exchanger is disposed between the first pump and the pump intake,
- wherein the pump intake is disposed between the heat exchanger and the seal section,
- wherein the seal section is disposed between the pump intake and the motor, and
- wherein the motor is disposed between the seal section and the gauge.
19 more elements
Dependencies are inferred from the claim text.