WO2015017810A1 - Pompe submersible électrique dotée d'une pluralité de moteurs fonctionnellement couplés à celle-ci et procédés d'utilisation - Google Patents

Pompe submersible électrique dotée d'une pluralité de moteurs fonctionnellement couplés à celle-ci et procédés d'utilisation Download PDF

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Publication number
WO2015017810A1
WO2015017810A1 PCT/US2014/049456 US2014049456W WO2015017810A1 WO 2015017810 A1 WO2015017810 A1 WO 2015017810A1 US 2014049456 W US2014049456 W US 2014049456W WO 2015017810 A1 WO2015017810 A1 WO 2015017810A1
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WO
WIPO (PCT)
Prior art keywords
motor
motors
electric submersible
switch mechanism
submersible pump
Prior art date
Application number
PCT/US2014/049456
Other languages
English (en)
Inventor
Yamila Antonieta ORREGO
Gopikrishna CHAVA
Ben PARTINGTON
Jose A. GAMBOA
Original Assignee
Chevron U.S.A. Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chevron U.S.A. Inc. filed Critical Chevron U.S.A. Inc.
Publication of WO2015017810A1 publication Critical patent/WO2015017810A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0693—Details or arrangements of the wiring
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
    • E21B43/121—Lifting well fluids
    • E21B43/128—Adaptation of pump systems with down-hole electric drives
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/021—Units comprising pumps and their driving means containing a coupling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • F04D13/10—Units comprising pumps and their driving means the pump being electrically driven for submerged use adapted for use in mining bore holes

Definitions

  • One or more embodiments of the present disclosure relate to, for example, electric submersible pumps having a plurality of motors operatively coupled thereto and an electrical switch mechanism allowing selection among one or more of the plurality of motors.
  • the artificial lift may be provided by a variety of methods including injection of C0 2 into the well to force the hydrocarbons up to the surface and by providing downiiole pumps to suck in the hydrocarbons and pump them up production tubing to the surface.
  • An electrical submersible pump (or "ESP") is a form of artificial lift pump designed to draw fluid from a well in the absence of pressure to suit the production rate required.
  • ESPs in the oilfield have been run as single units on the end of the production tubing (or coiled tubing) within a wellbore.
  • a power cable, attached to the electrical motor unit of the ESP, extends to the surface of the well alongside the production tubing (or coiled tubing) and terminates at the wellhead.
  • ESP motor failure is a significant contributor to ESP system failure during artificial lift operations.
  • ESP motors typically fail over time due to one or more factors (e.g., high temperatures, short circuits, fluid contamination, etc.), ESP motor and system failure is tremendously expensive, not only due to equipment costs (i.e., motors represent a substantial part of the total cost of the ESP system used in artificial lift operations), but even more so due to production time lost during workovers and other well interventions.
  • Embodiments disclosed herein provide electric submersible pumps having a plurality of motors operativeiy co upled thereto so that one or more backup motors are operated when a first motor fails, thereby postponing or eliminating costly workovers in the event of motor failure downhole.
  • embodiments disclosed herein relate to a downhole electric submersible pump system including a plurality of motors operativeiy coupled on a common shaft with an electric submersible pump and a downhole switch mechanism for providing an electrical circuit to each motor of the plurality of motors, wherein the downhole switch mechanism allows power to be delivered to at least one motor of the plurality of motors coupled with the electric submersible pump.
  • embodiments disclosed herein relate to a method of powering a plurality of motors operativeiy coupled with an electric submersible pump located downhole in a wellbore, the method including providing a downhole switch mechanism in the wellbore, the downhole switch mechanism being supplied with electrical power, the downhole switch mechanism further being connected to two or more motors operativeiy coupled on a common shaft with an electric submersible pump, providing electrical power through the downhole switch mechanism to a first motor of the two or more motors, actuating the downhole switch mechanism to break electrical power through the downhole switch mechanism to the first motor and to provide electrical power through the downhole switch mechanism to a second motor of the two or more motors.
  • inventions disclosed herein relate to a downhole switch mechanism located in a w r ellbore.
  • the downhole switch mechanism includes an electrical power input for receiving power from an electrical cable and at least two electrical power outputs connected to at least two motors operatively coupled with one or more electric submersible pumps, wherein the downhole switch mechanism is actuated from the surface via the electrical cable and allows power to be delivered to at least one motor of the at least two motors coupled with the one or more electric submersible pumps.
  • Figure 1 illustrates a particular embodiment of an electric submersible pump and a plurality of motors operatively coupled thereto, as well as a downhole switch mechanism, in accordance with one or more embodiments of the present disclosure.
  • Figure 2 illustrates an alternative embodiment of an electric submersible pump and a plurality of motors operative!)' coupled thereto, as well as a downhole switch mechanism, in accordance with one or more embodiments of the present disclosure.
  • Figure 3 illustrates, in flowchart form, an embodiment of a method of powering a plurality of motors operatively coupled with an electric submersible pump located downhole in a wellbore in accordance w r ith one or more embodiments of the present disclosure.
  • the downhole system includes a production (or coiled) tubing having an intake into whic fluid (e.g., hydrocarbons, water, brine) from the wellbore may be drawn and pumped to the surface.
  • whic fluid e.g., hydrocarbons, water, brine
  • the downhole system may be arranged for injecting fluid into a formation adjacent to the wellbore (e.g., waterflooding, polymer flooding).
  • the downhole system may comprises one or more pumps (e.g., disposed at a lower end of the production tubing).
  • the pumps may comprise electrical submersible pumps having two or more (e.g., hermetically sealed) motors coupled to the pump body.
  • Two or more motors may be coupled with the pump.
  • the motors may be disposed downhole from the pump or up hole from the pump.
  • one or more motors may be disposed downhole from the pump and one or more motors disposed up hole from the pump.
  • the motors may be located directly adjacent to the pump, or may be indirectly coupled to the pump if other components (e.g., gas separators, sensors, protectors/isolators, thrust bearings, seals) are located therebetween.
  • the motors may range in horsepower (HP) from at least about 100 HP, or 200 HP, or 500 HP, up to about 1000 HP, or 1500 HP, or greater.
  • the horsepower of the motor may be configured based on the wellbore casing size (e.g., use of different sized motors in 5.5 inch casing compared to 7 inch casing).
  • the motors may be installed in tandem having a common longitudinal shaft so that when a first motor is operating the additional motors mn idle, generating no significant electrical output.
  • the common shaft may be a one-piece shaft that may not separate, but in an alternative embodiment of the common shaft, the common shaft may comprise or include separate shafts (e.g., discussed in the context of Figures 1 -2).
  • the downhole system further comprises an electrical cable that travels from the surface and powers the motors, and a downhole (e.g., electrical) switch mechanism disposed at or near an end of the electrical cable.
  • the downhole electrical switch mechanism may include an electrical input connected to the electrical cable, and two or more electrical outputs connected, by way of motor lead extensions, to the motors to operate each of the motors.
  • Figure 1 illustrates a particular embodiment of an electric submersible pump and a plurality of motors operative!)' coupled thereto, as well as a downhole switch mechanism, in accordance with one or more embodiments of the present disclosure. More particularly, Figure 1 illustrates a particular embodiment of a downhole completion and production system or string 100 in accordance with one or more embodiments of the present disclosure.
  • a production tubing or string 102 extends along a length of a w r elibore from a wellhead (not shown) at the surface.
  • One or more pumps 104 may be disposed along a length of the production tubing 102 having an intake (not shown) into which fluid from the wellbore may be drawn and pumped to the surface.
  • the pumps 104 may be any type of electrical submersible pump having two or more (e.g., hermetically sealed) motors 106 coupled to the pump body.
  • the pumps 104 may be multistage centrifugal pumps operating in a vertical position and available from any number of pump manufacturers and/or sendee companies, as will be understood by one of ordinary skill in the art.
  • the pumps 104 may be ESP pumps available from the General Electric Company.
  • one or more pumps 104 may be operated in a manner for performing artificial lift operations in a wellbore.
  • one or more pumps 104 may be operated in a manner for injecting fluids (e.g., water, brine, acids, polymers, surfactants, etc.) into a formation adjacent the wellbore.
  • fluids e.g., water, brine, acids, polymers, surfactants, etc.
  • downhole ESP motors 106a and 106b may be coupled with the pump 104 (e.g., at the lower end of the production string 102).
  • motors 106a and 106b may be coupled with the pump 104.
  • the motors 106a and 106b may be disposed downhole of the pump 104, Alternatively, the motors may be disposed up hole of the pump 104. In yet other embodiments, one or more motors may be disposed up hole of the pump 104, and one or more motors may be disposed downhole of the pump 104.
  • the motors 106a and 106b may be located directly adjacent to the pump 104, or the motors 106a and 106b may be indirectly coupled to the pump 104 such that other components (e.g., gas separators, sensors, protectors/isolators, thrust bearings, seals) are located therebetween.
  • the motors 106a and 106b may be electric motors available from any number of suppliers as will be understood by one of ordinary skill in the art.
  • the motors 106a and 106b may be ESP motors available from the General Electric Company, such as (i) the TR-series motors, (ii) E-series motors, (iii) the three-phase two-pole induction motors, and/or (iv) any combination thereof.
  • Motors used in accordance with one or more embodiments disclosed herein may be 100 horsepower (HP) motors up to 1500 HP motors, or greater, as will be understood by one of ordinary skill in the art. It will be understood that the motors having different HP ratings may be used (i.e., motor 106a can have a different HP rating from motor 106b), or motors having all. the same HP ratings may be used.
  • the motors 106a and 106b may be installed in tandem (series) and having a common longitudinal motor shaft 107 so that when a first motor is operating the second motor runs idle.
  • idle means that the motor produces an insufficient output to operate pump 104.
  • the motor shaft of the idle motor rotates although no significant electrical output is generated.
  • the motors 106a and 106b may be located adjacent one another. In other embodiments, the motors 106a and 106b may be spaced apart and other components (e.g., gas separators, sensors, protectors/isolators, thrust bearings, seals) located therebetween.
  • the second motor when the second motor is operating the first motor may run idle.
  • a clutch mechanism may be disposed between the motors 106a and 106b that provides or transmits power from one motor to another when engaged, but can be disengaged (e.g., the clutch mechanism can disengage the shaft of the lower motor when the upper motor is operating).
  • the motors 106a and 106b may have separate motor shafts.
  • Figure 2 illustrates an alternative embodiment of an electric submersible pump and a plurality of motors operatively coupled thereto, as well as a downhole switch mechanism, in accordance with one or more embodiments of the present disclosure. More particularly, Figure 2 illustrates an embodiment of a clutch mechanism 202 and an embodiment of the ESP shaft 107 of Figure 1 comprising separate motor shafts for use with the clutch mechanism 202.
  • a production string 200 is similar to the production string 100, but may include the clutch mechanism 202.
  • the clutch mechanism 202 may be a clutch.
  • the clutch mechanism may include a clutch as well as one or more other components.
  • the clutch mechanism 202 may disengage at least a portion of the common shaft corresponding to the lower motor 106b and at least a portion of the common shaft corresponding to the upper motor 106a when the upper motor 106a is operating.
  • the clutch mechanism 202 may be disposed between the upper motor 106a and lower motor 106b, and the clutch mechanism 202 may disengage the shaft of the lower motor 106b and the shaft of the upper motor 106a when the upper motor 106a is operating.
  • the common shaft (e.g., shaft 107 of Figure 1) may include separate motor shafts such as (i) an ESP shaft 207a corresponding to the upper motor 106a, (ii) an ESP shaft 207b corresponding to the lower motor 106b, and so on with an ESP shaft corresponding to each motor.
  • the clutch mechanism 202 may be disposed between the motors 106a and may disengage or decouple the ESP shaft 207b corresponding to the lower motor 106b from the ESP shaft 207a corresponding to the upper motor 106a, or vice versa, or decouple in some other manner.
  • the lower motor 106b and its components may experience less wear and tear, may not ran idle, and may even remain unused until the upper motor 106a experiences a failure.
  • the clutch mechanism 202 may also provide or transmit power from one motor to another when engaged.
  • the clutch mechanism 202 may serve as a link between various ESP shafts.
  • the clutch mechanism 202 may be disengaged which may in turn disengage or decouple an ESP shaft from another ESP shaft, or the clutch mechanism 202 may be engaged which may in turn engage or couple an ESP shaft with another ESP shaft.
  • a downhoie electrical switch mechanism 110 may deliver electrical power through the downhoie electrical switch mechanism 110 to the upper motor 106a while the clutch mechanism 202 and the lower motor 106b may remain inactive. Also, the lower motor 106b may not be engaged or coupled to the upper motor 106a at this point. The lower motor 106b may be downhoie of the upper motor 106a, and the clutch mechanism 202 may be disposed between the lower motor 106b and the upper motor 106a.
  • the downhoie electrical switch mechanism 110 may break electrical power through the downhoie electrical switch mechanism 1 10 to the upper motor 106a and deliver electrical power through the downhoie electrical switch mechanism 1 10 to the lower motor 106b (e.g., so that the lower motor 106b begins operating and not the upper motor 106a). At least a portion of the electrical power to the lower motor 106b may be provided from the lower motor 106b to the clutch mechanism 202. In response to electrical power to the clutch mechanism 202, the clutch mechanism
  • the clutch mechanism 202 may engage at least a portion of the common shaft corresponding to the lower motor 106b and at least a portion of the common shaft corresponding to the upper motor 106a when the lower motor 106b is operating. For example, in response to receiving electrical power from the lower motor 106b, the clutch mechanism 202 may engage or couple the ESP shaft 207b of the lower motor 106b and the ESP shaft 207a of the upper motor 106a, or vice versa, or couple in some other manner. The clutch mechanism 202 may continue to engage or couple the ESP shaft 207b of the lower motor 106b and the ESP shaft 207a of the upper motor 106a during operation of the lower motor 106b.
  • the clutch mechanism 202 may engage (e.g., engage or couple the ESP shaft 207b and the ESP shaft 207a) once the lower motor 106b is activated, in other words, the clutch mechanism 202 may engage in response to activation of the lower motor 106b.
  • the downhole electrical switch mechanism 1 10 may allow power to be delivered to the lower motor 106b, and the clutch mechanism 202 may receive power from the lower motor 106b.
  • the clutch engagement may depend on whether the clutch mechanism 202 is either electro-magnetic or mechanical or hydraulic.
  • the clutch mechanism 202 may be at least one of electro-magnetic, mechanical, or hydraulic.
  • the clutch mechanism 202 is electro-magnetic, electrical power may be utilized for its operation. This power could be supplied once the lower motor 106b is energized. The clutch mechanism 202 may then utilize electrical communication with the lower motor 106b's power so that part of the electrical power can be utilized for the clutch mechanism 202 -s operation.
  • an electronic signal may be used for its engagement. This signal can be modulated over the lower motor ! 06b's supplied cable.
  • An electronic circuit, external or integrated to the lower motor 106b, may receive this signal and may activate the clutch mechanism 202.
  • the clutch mechanism 202 may utilize electrical communication with the lower motor 106b.
  • An alternative may be to transmit the signal through a cable that connects the downhole electrical switch mechanism 110 and the clutch mechanism 202, This could be a downhole instrumentation cable or a fiber optic cable. The fiber optic cable may occupy less space in the annular space.
  • the engagement may also be made using the internal motor oil.
  • a small pump or turbine may be installed between the clutch mechanism 202 and the lower motor 106b. This pump or turbine may be coupled to the lower motor 106b. Once the lower motor 106b is activated, the pump or turbine may boost motor oil toward the clutch mechanism 202 -s internals, which may cause the clutch engagement.
  • An alternative may be to use motor oil thermal expansion for engaging the clutch mechanism 202. Once the lower motor 106b is activated, the internal temperature of this motor may increase (as well as the upper motor 106a may d ecrease). The increment of temperature may cause the thermal expansion of the motor oil increasing the internal pressure of the oil inside the lower motor 106b. The increase of internal pressure may be used for creating an up-thrust force against the clutch mechanism 202 causing its engagement.
  • Terminology such as "when the lower motor is operating” may include, for example, the lower motor 106b begins operating, during operation of the lower motor 106b, etc.
  • terminology such as "when the upper motor is operating” may include, for example, the upper motor 106a begins operating, during operation of the upper motor 106a, etc.
  • the order of disengaging at least a portion of the common shaft corresponding to the lower motor and at least a portion of the common shaft corresponding to the upper motor may depend on the specific implementation, and may include, for example: (i) the at least a portion of the common shaft corresponding to the lower motor may be disengaged from the at least a portion of the common shaft correspondmg to the upper motor, (ii) the at least a portion of the common shaft corresponding to the upper motor may be disengaged from the at least a portion of the common shaft correspondmg to the lower motor, etc.
  • the order of engaging at least a portion of the common shaft corresponding to the lower motor and at least a portion of the common shaft correspondmg to the upper motor may depend on the specific implementation, and may include, for example: (i) the at least a portion of the common shaft corresponding to the lower motor may be engaged to the at least a portion of the common shaft corresponding to the upper motor, (ii) the at least a portion of the common shaft correspondmg to the upper motor may be engaged to the at least a portion of the common shaft correspondmg to the lower motor, etc.
  • an electrical cable 108 that travels from the surface (which may be several hundred or thousand feet) powers the motors 106a and 106b through a downhole electrical switch mechanism 110.
  • the electrical cable 108 may be secured to the production string 102 by way of practically any attachment mechanism used in the context of ESP's (illustrated as an attachment mechanism 204), standard clamps or cable protectors (not shown) as will be understood by one of ordinary skill in the art.
  • clamps or cable protectors may be disposed at about every 30 feet or each joint of the production tubing 102.
  • the electrical cable 108 is encapsulated within a coiled tubing umbilical.
  • the submersible electrical cable 108 may be used for submersible electrical pumps in a deep well and is capable of withstanding harsh conditions used in both fresh and salt water. Further, the submersible electrical cable 108 may be a single or multiple conductor type, and may be flat or round in cross section. In certain instances, the submersible electrical cable 108 is color-coded for identification and may include an overall cable jacket that is also color-coded.
  • the electrical cable 108 may be a three-phase (3-pbase) or four-phase (4-phase) cable, in which plain copper and/or tinned copper are used as a conductor.
  • the electrical cable 108 may comprise a PVC 3-phase or 4-phase cable, either flat or round.
  • the electrical cable 108 may comprise a rubber 3-phase or 4-phase cable, either flat or round.
  • the electrical cable 108 may comprise a flat drincable, or H07R -F cable, which will be understood by one of ordinary skill in the art.
  • the electrical cable 108 may be an ESP cable available from the General Electric Company or available from any number of suppliers as will be understood by one of ordinary skill in the art.
  • the electrical cable 108 may be General Electric Company's PowerlineTM cable.
  • the downhole electrical switch mechanism 110 may be disposed at or near an end of the electrical cable 108.
  • the downhole electrical switch mechanism 110 may be a downhole electrical switch.
  • the downhole electrical switch mechanism 110 may include a downhole electrical switch as well as other components.
  • a downhole switch mechanism may be the downhole electrical switch mechanism 110, such need not be the case in some embodiments.
  • the downhole switch mechanism may be a downhole electrical switch or simply a downhole switch.
  • the downhole electrical switch mechanism 1 10 may be separate from, or it may be integral with or incorporated into the ESP housing.
  • the downhole electrical switch mechanism 1 10 may be any type of electrical component that can switch an electrical circuit, interrupting or diverting it from one conductor to another.
  • the downhole electrical switch mechanism 110 may include an electrical power input 212 connected to the electrical cable 108 and at least two electrical power outputs 214a and 214b connected to motor lead extensions 112a and 112b,
  • the downhole electrical switch mechanism 110 includes internal conductive pieces or contacts (not shown), which may be metal, that touch to complete (make) a circuit or separate to open (break) the circuit between the electrical cable 108 and the motor lead extensions 112a and 112b to operate either of the motors 106a and 106b, respectively.
  • the motor lead extensions 112a and 112b may be lead extensions available from the General Electric Company or available from any number of suppliers as will be understood by one of ordinary skill in the art.
  • the downhole electrical switch mechanism 110 may utilize an electrical signal to make and break the circuit to the motors 106a and 106b, through respective motor lead extensions 112a and 112b, to operate motors 106a and 106b, respectively.
  • Each motor 106a and 106b has a motor lead extension 112a and 112b, respectively, that extends from each respective motor to the downhole electrical switch mechanism 1 10 (which may extend up to 100 feet or more).
  • Figure 3 illustrates, in flowchart form, an embodiment of a method of powering a plurality of motors operatively coupled with an electric submersible pump located downhole in a wellbore in accordance with one or more embodiments of the present disclosure.
  • a method 300 of powering a plurality of motors may he utilized for operating the electrical submersible pump 104 (e.g., at the lower end of the production string 102),
  • the method 300 may include, at 302, providing a downhole switch mechanism in the wel!bore, the downhole switch mechanism being supplied with electrical power, the downhole switch mechanism further being connected to two or more motors operatively coupled on a common shaft with an electric submersible pump.
  • a downhole electrical switch mechanism 1 10 may be provided, the downhole electrical switch mechanism 110 being supplied electrical power through an electrical cable 108 running from the surface, or alternatively through a separate electrical cable.
  • the downhole electrical switch mechanism 1 10 is connected by way of motor lead extensions 112a and 112b to motors 106a and 106b, respectively, coupled to the pump 104 (e.g., at the lower end of the production string 102) by the ESP shaft 107 ( Figure 1) or the ESP shafts 207a and 207b ( Figure 2).
  • the method 300 may include, at 304, providing electrical power through the downhole switch mechanism to a first motor of the two or more motors.
  • the method 300 may also include, at 306, disengaging at least a portion of the common shaft corresponding to the second motor and at least a portion of the common shaft corresponding to the first motor when the first motor is operating.
  • the downhole electrical switch mechanism 110 when the production string 102 is ran, the downhole electrical switch mechanism 110 is set in a first position to make a circuit between the electrical cable 108 and the first or upper motor 106a, thereby powering the first motor 106a, The circuit between the electrical cable 108 and the second (or lower) motor 106b is broken at this time, and thus the second motor 106b receives no power at this time and runs idle.
  • the clutch mechanism 202 may be utilized to disengage at least a portion of the common shaft corresponding to the second (or lower) motor 106b, such as disengage the ESP shaft 207b from ESP shaft 207a, when the first (or upper) motor 106a is operating.
  • the method 300 may include, at 308, actuating the downhole switch mechanism to break electrical power through the downhole switch mechanism to the first motor and to provide electrical power through the downhole switch mechanism to a second motor of the two or more motors. For example, subsequently, the downhole electrical switch mechanism 1 10 may be moved to a second position to make a circuit between the electrical cable 108 and the second motor 106b, thereby powering the second motor 106b. The circuit between the electrical cable 108 and the first motor 106a is broken at this time, and thus the first motor 106a receives no power at this time and nins idle.
  • the downhole electrical switch mechanism 1 10 may be activated to break the circuit with the first motor 106a and make the circuit with the second motor 106b, thereby delivering power to the second motor 106b while the first motor 106a runs idle. For example, if the upper motor 106a fails due to any reason, the downhole electrical switch mechanism 1 10 allows selection of the lower motor 106b to continue operating the pump.
  • the downhole electrical switch mechanism 110 may switch between motors 106a and 106b based on downhole reservoir or motor conditions (e.g., information such as motor winding temperature, motor load, power supply, downhole sensor data).
  • the second motor 106b may be operated before the first motor 106a.
  • more than the two motors 106a and 106b shown may be included with a single electric submersible pump 104, such that the downhole electrical switch mechanism 1 10 is configured to make and break circuits with each individual motor coupled with the electric submersible pump 104.
  • only one motor at a time may operate the electric submersible pump 104 while any other motors coupled therewith to the electric submersible pump 104 remain idle.
  • more than one motor at a time may operate the electric submersible pump 104 to provide extra power and pumping and/or injecting capabilities.
  • one or more motors at a time can he operated while any additional motors can remain idle.
  • the disengagement of the ESP shaft 207b may be reversed at 308.
  • the method 300 at 309, may include engaging at least a portion of the common shaft corresponding to the second motor and at least a portion of the common shaft corresponding to the first motor when the second motor is operating.
  • the clutch mechanism 202 may be utilized to engage at least a portion of the common shaft corresponding to the second (or lower) motor 106b, such as engage the ESP shaft 207b with the ESP shaft 207a, when the second (or lower) motor 106b is operating.
  • the method 300 may include, at 310, performing artificial lift operations in the wellbore.
  • the method 300 may also include, at 312, injecting fluids into a formation adjacent the wellbore.
  • the electric submersible pump or pumps 104 may be utilized to perform artificial lift operations and/or to inject fluids depending on the particular impl ementation and/or needs of the users.
  • sensors may be included on the surface or downhole in additional embodiments.
  • the surface may include entities configured to receive data from downhole, process data, compare data, send data downhole, etc.
  • the entities may include computing apparatuses, wherein a particular computing apparatus includes at least one processor and/or at least one memory bearing program code (e.g., data and instructions) that when executed by the processor cause the computing apparatus to perform actions, methods, etc.
  • User input may or may not be needed depending on the task.
  • the terms “comprise” (as well as forms, derivatives, or variations thereof, such as “comprising” and “comprises”) and “include” (as well as forms, derivatives, or variations thereof such as “including” and “includes”) are inclusive (i.e., open-ended) and do not exclude additional elements or steps. Accordingly, these terms are intended to not only cover the recited element(s) or step(s), but may also include other elements or steps not expressly recited.
  • a downhole electric submersible pump system comprising: a plurality of motors operatively coupled on a common shaft with an electric submersible pump; and a downhole switch mechanism for providing an electrical circuit to each motor of the plurality of motors; wherein the downhole switch mechanism allows power to be delivered to at least one motor of the plurality of motors coupled with the electric submersible pump.
  • A6 The electric submersible pump system of paragraph Al , wherein the plurality of motors includes an upper motor and a lower motor, wherein the lower motor is downhole of the upper motor, further comprising a clutch mechanism disposed between the lower motor and the upper motor.
  • a 12 The electric submersible pump system of paragraph Al , wherein the plurality of motors are disposed up hole from the electri c submersible pump.
  • A15 The electric submersible pump system of paragraph A3, wherein the electrical cable comprises a three-phase electrical cable.
  • the electric submersible pump system of paragraph Al wherein the plurality of motors are hermetically sealed motors coupled with the electric submersible pump.
  • A! 7 The electric submersible pump system of paragraph Al, wherein one or more electric submersible pumps are operated in a manner for performing artificial lift operations in a wellbore.
  • a method of powering a plurality of motors operatively coupled with an electric submersible pump located downhole in a wellbore comprising: providing a downhole switch mechanism in the wellbore, the downhole switch mechanism being supplied with electrical power, the downhole switch mechanism further being connected to two or more motors operatively coupled on a common shaft with the electric submersible pump; providing electrical power through the downhole switch mechanism to a first motor of the two or more motors; and actuating the downhole switch mechanism to break electrical power through the downhole switch mechanism to the first motor and to provide electrical power through the downhole switch mechanism to a second motor of the two or more motors.
  • a downhole switch mechanism located in a wellbore comprising: an electrical power input for receiving power from an electrical cable; and at least two electrical power outputs connected to at least two motors operatively coupled with one or more electric submersible pumps; wherein the downhole switch mechanism is actuated from the surface via the electrical cable and allows power to be delivered to at least one motor of the at least two motors coupled with the one or more electric submersible pumps.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne un système de pompe submersible électrique de fond (100, 200) incluant une pluralité de moteurs (106a, 106b) fonctionnellement couplés sur un arbre commun (107, 207a, 207b) avec une pompe submersible électrique (104) et un mécanisme de commutation de fond (110) fournissant un circuit électrique à chacun des moteurs (106a, 106b), le mécanisme de commutation de fond (110) permettant de fournir du courant à au moins un moteur (106a, 106b).
PCT/US2014/049456 2013-08-01 2014-08-01 Pompe submersible électrique dotée d'une pluralité de moteurs fonctionnellement couplés à celle-ci et procédés d'utilisation WO2015017810A1 (fr)

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US11578571B2 (en) * 2021-02-22 2023-02-14 Saudi Arabian Oil Company Downhole electric switch
CN113846999B (zh) * 2021-09-17 2024-02-06 山东高原油气装备有限公司 一种双电机驱动的立式抽油机及其工作方法
US11828145B2 (en) * 2021-10-27 2023-11-28 Saudi Arabian Oil Company Electrical submersible pump for a wellbore
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