WO2016036342A1 - Commande de rotation pour une pompe submersible électrique - Google Patents

Commande de rotation pour une pompe submersible électrique Download PDF

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Publication number
WO2016036342A1
WO2016036342A1 PCT/US2014/053644 US2014053644W WO2016036342A1 WO 2016036342 A1 WO2016036342 A1 WO 2016036342A1 US 2014053644 W US2014053644 W US 2014053644W WO 2016036342 A1 WO2016036342 A1 WO 2016036342A1
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WO
WIPO (PCT)
Prior art keywords
motor
electrical current
rotation
current
temperature
Prior art date
Application number
PCT/US2014/053644
Other languages
English (en)
Inventor
Joseph C. Liu
Original Assignee
Schlumberger Canada Limited
Services Petroliers Schlumberger
Schlumberger Holdings Limited
Schlumberger Technology B.V.
Prad Research And Development Limited
Schlumberger Technology Corporation
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 Schlumberger Canada Limited, Services Petroliers Schlumberger, Schlumberger Holdings Limited, Schlumberger Technology B.V., Prad Research And Development Limited, Schlumberger Technology Corporation filed Critical Schlumberger Canada Limited
Priority to PCT/US2014/053644 priority Critical patent/WO2016036342A1/fr
Publication of WO2016036342A1 publication Critical patent/WO2016036342A1/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
    • F04D13/08—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
    • 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
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0066—Control, e.g. regulation, of pumps, pumping installations or systems by changing the speed, e.g. of the driving engine

Definitions

  • an upper ESP can be turned off while a lower ESP is powered on and running.
  • a sizeable volume of well can flow through the passive upper pump, causing its shaft to passively rotate like a turbine.
  • the unpowered upper pump allows fluid to flow through in this manner, the flowing fluid can cause damage to the pump stage and bearings in the upper ESP motor and protector sections due to poor oil film lubrication at the unknown speed of rotation.
  • Rotation control for a motor of an electric submersible pump is provided.
  • An example system includes an electric submersible pump (ESP) for artificial lift in a well, including a motor rotatable when an AC electrical current is applied.
  • a rotation control module applies an electrical current to the motor to stop or slow down rotation of the motor when the motor is powered down and passively rotating, and a controller monitors an operating condition and varies the electrical current to maintain a safety threshold for the operating condition while stopping or slowing down the rotation of the shaft.
  • a rotation control module for locking the shaft of an ESP includes a sensor interface for receiving information associated with an operating condition, and a power manager to apply electrical power to the stator of the ESP motor based on the operating condition.
  • the locking current can electromagnetically lock the shaft of the ESP motor.
  • An example method includes dynamically receiving measurements associated with an ongoing operating condition, and applying a current to an ESP motor associated with the operating condition to counteract passive rotation of the motor.
  • FIG. 1 is a diagram of an ESP string including two ESP pods, and a rotation control module to stop or slow down passive rotation of an upper ESP motor and pump.
  • FIG. 2 is a diagram of an example ESP motor, including sensors to assist rotation control executed with DC power.
  • FIG. 3 is a diagram of an example ESP, including sensors to assist a rotation control module to configure DC current for locking or slowing rotation of an ESP motor.
  • FIG. 4 is a block diagram of an example rotation control module.
  • FIG. 5 is a block diagram of an example computing or PLC environment for the example rotation control module of Fig. 4.
  • FIG. 6 is a flow diagram of an example method of applying rotation control to an ESP motor.
  • This disclosure describes example embodiments of rotation control for a motor of an electric submersible pump (ESP).
  • ESP electric submersible pump
  • an AC or DC current is injected into phases of a 3-phase alternating-current (AC) ESP motor, such as an induction motor or a permanent magnet motor, to slow down, brake, or lock the shaft of the ESP pump and motor. Locking the pump rotation can reduce the flow of well fluid through an upper, unpowered ESP pump in a string of ESPs, thereby reducing wear or damage to the respective pump and bearings.
  • AC alternating-current
  • power such as DC power
  • VSD variable speed drive
  • a dedicated voltage source is applied to the upper motor of a dual or multi-pod ESP installation through the 3-phase ESP motor cable.
  • Current associated with the power effectively uses the motor stator to create a large continuous-field electromagnet for a given interval, and the stationary magnetic field generated from the stator locks the rotor shaft assembly in place.
  • an example smart controller manages the application of electrical power (such as, for example, DC current) to slow down, brake, or lock an ESP motor.
  • the smart controller may consider motor and/or well variables to decide how to apply rotation control.
  • the downhole environment of an ESP can be severe, including high electrical power being applied from the surface to the ESP motor at high temperatures and high pressures inherent in wells, and in the presence of high velocity fluid flow, moving abrasives, high rotational RPMs, and high machine torque.
  • the smart controller may receive multiple data inputs regarding operating conditions of the downhole environment and the current machine state of one or more motors and pumps, and may use this sensor data to program an application of electrical current to an ESP motor that may be passively rotating.
  • the smart controller applies AC current at a lower voltage and frequency than during standard operation, and in a reverse direction of rotation, to slow down the motor.
  • the smart controller may select or generate several iterative and feedback-informed schemes for custom application of rotation control and for tailoring rotation control according to changing conditions.
  • FIG. 1 shows an example system 100, in which a rotation control module 102 and a variable speed drive (VSD) 104 are connected to at least one pod of a multiple pod 106 & 106' ESP string by means of a 3-conductor power cable 108, for example.
  • VSD variable speed drive
  • Each ESP pod 106 & 106' may have a respective motor 110 & 110', a respective pump 112 & 112', and a respective protector section 114 & 114'.
  • Rotation control module 102 may be a discrete module or a retrofit to a stock VSD 104.
  • a rotation control module 102' may be included with or integrated into an example VSD 104' as part of the electrical and control fabric of the example VSD 104'.
  • Fig. 2 illustrates a possible configuration of ESP motor 110 for use in accordance with one possible implementation of system 100.
  • System 100 may also include one or more of various sensors, such as one or more well temperature sensors 200, motor temperature sensors 202, motor winding temperature sensors 204, shaft speed RPM sensors (tachometers) 206, AC voltage meters 208 for indicating voltage at one or more AC power sources 210, DC voltage meters 212 for indicating voltage at one or more DC power sources 214, amperage meters 216, torque sensors 250 or calculators, and any other sensors and/or meters known in the art to measure operating conditions related to the downhole environment and/or the ESPs 106, 106' in system 100.
  • sensors such as one or more well temperature sensors 200, motor temperature sensors 202, motor winding temperature sensors 204, shaft speed RPM sensors (tachometers) 206, AC voltage meters 208 for indicating voltage at one or more AC power sources 210, DC voltage meters 212 for indicating voltage at one or more DC power sources 214, amperage meters
  • Example motor 110 may have various hardware components, such as a motor head 218, a motor base 220, and an outer housing 222.
  • a rotor 224 supported by rotor bearings 226, drives rotation of a shaft 228.
  • a stator 230 with laminations can provide a rotating magnetic field over three AC phases to drive rotor 224.
  • Stator 230 can be hardwired with windings 232, which create multiple electromagnets when electrified, with complementary north and south poles disposed across the diameter of stator 230. Each AC phase may be assigned one third of the wired electromagnets of stator 230.
  • rotor 224 can have rotor bars and end rings and/or permanent magnets to enable induced electromagnetic fields to interact with the electromagnetic fields of stator 230.
  • Motor 110 may have other features, such as a drain and fill valve 234 for motor oil, such as dielectric oil.
  • a coupling 236 at motor head 218 can connect with pump 112 or protector 114.
  • Bearings for shaft 228 may have associated thrust members/bearings 238 or a thrust ring to bear the axial load generated by rotor 224 and shaft 228 of motor 110.
  • Electrically, motor 110 may be connected to a terminal 240 by power cable 108.
  • Various types of sensors may be included in ESPs 106, 106' to monitor aspects of the above components in order to assist in determining rotation control, such as a DC rotation lock, to be applied.
  • Rotor 224 may have a rotor temperature sensor 242. There may also be a pothead temperature sensor 244. Each bearing, such as rotor bearings 226 and thrust member/bearing 238 may have a corresponding bearing temperature sensor 246.
  • a fiber optic strand 248 acting as a distributed temperature sensor may be placed in stator 230.
  • One or more windings (electromagnet pole) in stator 230 may have a respective temperature sensor (e.g., 204, 204', ... & 204") to measure qualities such as temperature related to motor windings assigned to each AC phase.
  • example system 100 may measure properties, such as distributed temperature, via optic fiber 248.
  • system 100 may utilize distributed temperature sensing, including optic fiber 248 placed internally in multiple places of motor stator 230.
  • Fiber 248 may be employed in stator 230 because of its small size and lack of dependence on downhole electrical power.
  • numerous sensors can be multiplexed along a length of a strand of fiber 248 by assigning different wavelengths of light for each sensor, or by sensing a corresponding time delay as light passes along the fiber through each sensor along the line. The time delay may be determined using an optical time-domain reflectometer or any other device known in the art.
  • Optic fibers 248 can be immune to electromagnetic interference, allowing them to be used as sensors downhole even when power is being supplied to motor 110. In certain embodiments, fibers 248 do not conduct electricity so they can be utilized with high voltage electricity. Fibers 248 can also be constructed with immunity to high temperatures.
  • Temperature can be measured using fiber 248 through various techniques, including evanescent loss that varies with temperature, analyzing the Raman scattering of the optical fiber 248, etc.
  • electrical voltage in ESPs 106 & 106' can be sensed by nonlinear optical effects in specially-doped fiber 248, which can alter the polarization of light as a function of voltage or electric field.
  • angle measurement sensors can be based on the Sagnac effect.
  • optical fiber sensors 248 for distributed temperature sensing in a downhole setting can be used when temperatures are too high for semiconductor sensors.
  • fiber optic sensors 248 can provide protection of measurement signals from noise corruption.
  • some conventional sensors can produce electrical output which can be converted into an optical signal for use with fiber 248.
  • PRT platinum resistance thermometer
  • a PRT can be outfitted with an electrical power supply.
  • a modulated voltage level at an output of the PRT can then be injected into optical fiber 248 via a transmitter.
  • low- voltage power can be provided to the transducer in such a scenario.
  • Rotating shaft 228 of ESPs 106, 106' may have one or more associated tachometer RPM sensors 206 and torque sensors 250. Torque sensors 250 may be packaged around motor shafts 228 for monitoring torque and rotational power.
  • ESPs 106, 106' may also have one or more water cut sensors 254 located at various locations along ESPs 106, 106' to measure, for example, oil purity and for water ingress detection.
  • One or more chemical sensors 252 may also be present, as may various additional sensors configured to detect, for example, gas-oil ratios, solids content, hydrogen sulfide and carbon dioxide concentrations, pH, density, viscosity, and any other chemical and physical parameters known in the art.
  • Fig. 3 illustrates an example configuration of pump 112 in ESP 106, 106' with various sensors.
  • Rotation control module 102 can gather pump parameters to assist in deciding an electrical current (such as DC current) and schema to apply motor 110 in order to lock it.
  • Pump 112 has a fluid intake 300 for well fluid, and a fluid discharge 302.
  • Pump 112 may have various bearings, such as bearing 304 and bearing 306. Each bearing 304, 306 may have an associated temperature sensor 308, 308'.
  • Fluid intake 300 may also have one or more pressure sensors 310 and temperature sensors 312.
  • fluid discharge 302 may have one or more corresponding pressure sensors 314 and temperature sensors 316.
  • Pump 112 may also have one or more associated flow sensors 318 to determine a current flow rate of pump 112, of the fluid flowing through pump 112 when passive, or other volumetric fluid data.
  • FIG. 4 shows one possible implementation of rotation control module 102 in greater detail.
  • Rotation control module 102 may be implemented in hardware, software, a computer, programmable logic controller (PLC), microcontroller, and the like.
  • PLC programmable logic controller
  • Rotation control module 102 can include one or more sensor interfaces 400, a motor information database 402, a DC power source 404, and a smart controller 406.
  • Sensor interfaces 400 can include, for example, an environmental (well) data input 408, an ESP data input 410, and a VSD data input 412.
  • Smart controller 406 can include a temperature monitor 414 with a motor winding temperature monitor 416, a tachometer 418, a power manager 420 with a voltage controller 422, and a power configuration module 424.
  • Power configuration module 424 may include an injection pattern module 426, a DC dwell module 428, a taper-up controller 430, a taper-down controller 432, and a phase selector 434 with an auto shifter 436.
  • environmental data input 408 may receive sensor input from one or more sensors monitoring the downhole well environment.
  • rotation control module 102 may receive sensor input from one or more of: downhole temperature gauges 200,316, pressure sensors 310, 314, flow gauges 318, density sensors, chemical sensors 252, and so forth.
  • ESP data input 410 may receive sensor input from one or more of: motor temperature sensors 202, motor winding temperature sensors 204, shaft speed RPM sensor (tachometer) 206, and so forth.
  • VSD data input 412 may receive indications of voltage and amperage levels from VSD 104, including when rotation control module 102 receives power from VSD 104. This can include implementations when one or more phases of AC electricity are combined and/or rectified to make DC power to be applied for ESP rotational lock.
  • Motor information database 402 stores nameplate information about motor 110 to be locked, including a rated amperage of motor 110, an AC voltage rating of motor 110, and temperature ratings of motor 110.
  • Rotation control module 102 includes, or has access to, DC power source 404 for locking ESP 106.
  • rotation control module 102 is integrated into VSD 104, and directs VSD 104 to supply DC power.
  • VSD 104 may include a special DC supply, or VSD 104 may generate DC current by rectifying one phase, or a combination of two phases of AC current available to VSD 104.
  • smart controller 406 can include a monitor 414 configured to track a temperature of motor 110 and/or a downhole environment associated with motor 110.
  • the temperature of motor 110 can be tracked by motor-winding temperature monitor 416 with one or more temperature sensors 204 embedded in, or in thermal contact with, the motor windings. Any known type of temperature sensors 204 can be used within motor 110, including thermocouples, resistance temperature detectors (RTDs), optic fibers, and so forth.
  • the temperature in motor 110 can be measure and/or estimated using a variety of other techniques known in the art, including measuring the resistance of the motor and long power leads as a system, and detecting changes in resistance caused by temperature change. Some such techniques can be performed in the absence of sensors 204.
  • one or more motor winding temperature sensors 204 can be used for each group of windings assigned to one phase of a 3-phase AC current supplied to motor 110.
  • the temperature of specific windings may be monitored when a DC rotation lock is applied through one phase (two wires) of a three wire cable, and then switched to a different phase (different set of two wires connected to different windings) when the windings being presently used become hot beyond a given threshold.
  • Smart controller 406 of rotation control module 102 may include tachometer 418 to measure revolutions per minute (RPMs) or a shaft rotational speed of motor shaft 228. This can enable smart controller 406 to determine if shaft 228 is locked, or not locked, and/or the degree of slowdown of rotation achieved in shaft 228.
  • RPMs revolutions per minute
  • smart controller 406 can also include, or have access to, power manager 420, including voltage controller 422.
  • an amount of current supplied to motor 110 for rotation control can be controlled by varying a voltage of DC power source 404.
  • Smart controller 406 may provide automatic control of the DC power via voltage controller 422.
  • voltage controller 422 can include a user interface and/or user-operable control for human intervention, such as a knob for a user to manually vary the voltage and thereby the amps applied to achieve a rotation control.
  • a user interface for controlling voltage and amps applied for rotation control could provide visual feedback from analog and/or digital meters indicating DC volts 212 and (e.g., DC) amps 216 applied.
  • power configuration module 424 can determine how to apply rotation control to motor 110 given one or more operating conditions at motor 110 and/or in the well environment.
  • Operating conditions can include temperature, rotation, vibration, or anything else that might provide insight into any state associated with an ESP, motor 110 and/or a well environment associated with motor 110.
  • Operating conditions can include conditions present when motor 110 is powered off and/or is receiving power. Further, operating conditions can include anything measured using the sensors and measurement techniques discussed in this disclosure as well as anything estimated using the estimation techniques discussed in this disclosure.
  • power configuration module 424 can dynamically select a voltage level, amperage level, injection pattern, duration, taper, and phase arrangement for electrical power (such as DC power) to be applied to motor 110 to implement a rotation lock or slowdown.
  • electrical power such as DC power
  • multiple environmental factors can influence the implementation of a rotation lock or slowdown.
  • the temperature of well fluid flowing through a powered-down, passive ESP can affects heat transfer when DC power is applied to the motor 110. For instance, when the fluid flow carries away a lot of heat, more DC current may be applied to motor 110 without fear of burning it out.
  • the physical and chemical composition of well fluid can also affect rotation control parameters.
  • well fluids may be carrying abrasive particulates that carry with them a potential for damage of a passively rotating ESP 106. 106'.
  • density, pressure, and flow velocity of well fluid may be associated with a force with which a powered-down ESP might be passively windmilled by the flow. In some embodiments, this information can be used to determine an amount of rotational slowdown or lock to be achieved.
  • power configuration module 424 can have access to environmental sensor data associated with sensors discussed above, such as those discussed in conjunction with Fig. 3.
  • power configuration module 424 can assist smart controller 406 in monitoring operating conditions (like, for example, motor temperatures) and varying the electrical current (such as DC current) to maintain relevant motor temperatures below a threshold, while stopping or slowing down the rotation of shaft 228.
  • operating conditions like, for example, motor temperatures
  • electrical current such as DC current
  • power configuration module 424 may configure the DC current to be applied to motor 110 at 300-500 amps and several hundred volts.
  • a circuit comprising one, two, or three wired phases of motor windings in stator 230, plus power cables from the surface to motor 110 may have an electrical resistance of as little as 20 ohms.
  • a rotation lock may sometimes be achieved through the injection of 100 kilowatts of power through a 20 ohm circuit.
  • a high kilo-wattage ballast resistor may be used in the circuit to buffer the production of heat and prevent damage to motor 110.
  • Power configuration module 424 can dynamically vary the applied power to fit ongoing circumstances. For instance, in some implementations, power configuration module 424 relies on data from motor winding temperature module 416 and tachometer 418.
  • An injection pattern module 426 may be utilized to determine a rotational speed of the passively windmilling ESP motor 110 from tachometer 418, and sequentially inject current to motor 110. In some implementations this can occur over changing pairs of the three wires in power cable 108 connected to motor 110 to simulate in motor 110 a rotating magnetic field opposing the passive rotational shaft speed, in order to stop or slow down shaft 228. As tachometer 418 indicates a decreasing shaft speed, injection pattern module 426 in turn slows down the simulated rotating magnetic field opposing the passive rotation. In other words, a rotating magnetic lock or brake produced by injection pattern module 426 applies current to a sequence of phases to anticipate the decreasing speed of shaft 228 to stop the rotation in a gradual, but if desired rapid, manner, when desired.
  • injection pattern module 426 can apply a positive polarity of DC current to a first lead of a 3-lead power cable 108 and a negative polarity of DC current to the remaining two leads of the 3-lead power cable 108.
  • Taper-up module 430 and taper-down module 432 allow rotation control to change during application to fit changing conditions. Taper-up module 430 can also be utilized to allow safety measures to protect motor 110, while taper-down module 432 can reduces the rotation control to that which is needed, for a variety of reasons, including efficiency and motor safety concerns.
  • taper-up module 430 selects an electrical current (such as DC current) based on an electrical current rating of motor 110, as stored in motor information database 402, and then increases the electrical current, provided that an operational condition (such as a sensed temperature) of motor 110 remains below a safety threshold, or when a rotational shaft speed remains above zero RPMs, and more rotational lock or slowdown may be useful.
  • an electrical current such as DC current
  • an operational condition such as a sensed temperature
  • taper-up module 430 increases the electrical current from 100% of the electrical current rating of the motor to 250% of the electrical current rating of the motor (as an example), after testing the temperature.
  • Taper-down module 432 may select a DC electrical current based on an electrical current rating of the motor, and then decrease the DC electrical current based on sensing that a temperature of motor 110 is exceeding a safety threshold, or based on a rotational shaft speed remaining at zero RPMs, in which case less rotational lock may be needed.
  • DC dwell module 428 signals taper-down module 432 to decrease the DC current to motor 110 in order to achieve a certain duration of stopping or slowing down shaft 228, while maintaining the temperature of the 110 below a safety threshold. That is, taper-down module 432 can dynamically adjust the DC power in relation to sensing an ongoing temperature of the AC motor in order to sustain locking the shaft of the AC motor over a selected duration of time.
  • Phase selector 434 in power configuration module 424 can select one or more pairs or combinations of wires in power cable 108 connected to motor 110 to inject current to motor 110. In some embodiments, this can happen over the hardwiring (windings) for a single AC phase. Similarly, this can also happen over the hardwiring for multiple AC phases.
  • auto shifter 436 in phase selector 434 may select a single pair of wires or a set of wires in power cable 108 for injecting DC current over a first group of motor windings assigned to one or more AC phases, and then switch the injection of the DC current to another set of wires associated with a second group of motor windings assigned to one or more other AC phases. This can happen, for example, when a temperature in the particular windings associated with the first group exceeds a safety threshold. Auto shifter 436 may be used when the heating from the DC injection causes a buildup of heat very slowly. Auto shifter 436 rotates use of the windings so that any one set of the windings is not overused.
  • auto shifter 436 of phase selector 434 applies 3-phase AC to power cable 108 and to motor 110, but at a lower voltage, for example, and lower frequency than for standard operation, and in an opposite direction of rotation of the magnetic field generated by stator 230 during standard AC operation.
  • auto shifter 436 can accomplish this by reversing any two leads that would be used during standard AC operation of motor 110.
  • auto shifter 436 can apply a positive polarity of DC current to a first lead of a 3-lead power cable 108 and a negative polarity of the DC current to the remaining two leads of the 3-lead power cable 108 (or vice versa for the DC polarities).
  • Power configuration module 424 and power manager 420 may adjust the DC power to strike a balance between reducing the speed of rotation while maintaining the temperature of the AC motor 110 below a safety threshold.
  • Fig. 5 shows an example device 500, such as a computing device or a programmable logic controller (PLC), etc., with a processor 502 and memory 504 for hosting an example rotation control module 102 for locking or slowing rotation of a passively rotating ESP motor and/or pump.
  • Device 500 is one example of a computing device or programmable device, and is not intended to suggest any limitation as to scope of use or functionality of device 500 and/or its possible architectures. Further, device 500 should not be interpreted as having any dependency relating to one or a combination of components illustrated in the device 500.
  • device 500 includes one or more processors or processing units 502, one or more memory components 504 (on which, for example, rotating lock module 102 may be stored in whole or in part), a bus 508 configured to allow various components and devices to communicate with each other, and local data storage 510, among other components.
  • processors or processing units 502 one or more memory components 504 (on which, for example, rotating lock module 102 may be stored in whole or in part)
  • memory components 504 on which, for example, rotating lock module 102 may be stored in whole or in part
  • bus 508 configured to allow various components and devices to communicate with each other
  • local data storage 510 among other components.
  • Memory 504 may include one or more forms of volatile data storage media such as random access memory (RAM)), and/or one or more forms of nonvolatile storage media (such as read-only memory (ROM), flash memory, and so forth).
  • RAM random access memory
  • ROM read-only memory
  • Bus 508 can include one or more of any of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, and a processor or local bus using any of a variety of bus architectures. Bus 508 can include wired and/or wireless buses.
  • Local data storage 510 can include fixed media (e.g., RAM, ROM, a fixed hard drive, etc.) as well as removable media (e.g., a flash memory drive, a removable hard drive, optical disks, magnetic disks, and so forth).
  • a user interface (Ul) device may also communicate via a user interface (Ul) controller 512, which may connect with the Ul device either directly or through bus 508.
  • a network interface 514 may communicate outside of device 500 via a connected network, and in some implementations may communicate with hardware, such as one or more sensors, VSD 104, etc.
  • sensors and VSD 104 may communicate with device 500 as input/output devices 506 via bus 508 and via a USB port, for example.
  • a media drive/interface 516 can accept removable tangible media 518, such as flash drives, optical disks, removable hard drives, software products, etc.
  • removable tangible media 518 such as flash drives, optical disks, removable hard drives, software products, etc.
  • logic, computing instructions, an/or software program comprising elements of the rotation control module 102 may reside on removable media 518 readable by media drive/interface 516.
  • one or more input/output devices 506 can allow a user to enter commands and information to device 500, and also allow information to be presented to the user and/or other components or devices.
  • input devices 520 include, in some implementations, sensors, a keyboard, a cursor control device (e.g., a mouse), a microphone, a scanner, and any other input devices known in the art.
  • output devices include a display device (e.g., a monitor or projector), speakers, a printer, a network card, and so on.
  • rotation control module 102 may be described herein in the general context of software or program modules, or the techniques and modules may be implemented in pure computing hardware.
  • Software generally includes routines, programs, objects, components, data structures, and so forth that perform particular tasks or implement particular abstract data types.
  • An implementation of these modules and techniques may be stored on or transmitted across some form of tangible computer-readable media.
  • Computer-readable media can be any available data storage medium or media that is tangible and can be accessed by a computing device. Computer readable media may thus comprise computer storage media.
  • Computer storage media designates tangible media, and includes volatile and non-volatile, removable and non-removable tangible media implemented for storage of information such as computer readable instructions, data structures, program modules, or other data.
  • Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other tangible medium which can be used to store the desired information, and which can be accessed by a computer.
  • Fig. 6 is an example method 600 of applying rotation control to an ESP motor. Some parts of the example method 600 may be executed by a rotation control module, such as rotation control module 102, or by other suitable hardware and software. In the flow diagram, operations are represented by individual blocks.
  • an ongoing operating condition can be dynamically measured.
  • the operating condition can be temperature, rotation, vibration, or anything else providing insight into any state associated with a motor or an associated well environment.
  • the motor such as motor 110, is part of an electric submersible pump (ESP).
  • ESP electric submersible pump
  • the motor can be a passive AC motor.
  • an electrical current is applied to the motor to stop or slow down a passive rotation of the motor.
  • the electrical current can be varied in response to changes in the ongoing operating condition.
  • method 600 can include calculating a reduction of the electrical current in order to lock or slow down passive rotation of the motor over a very long duration of time, while maintaining the ongoing operating condition below a selected safety threshold.
  • method 600 may also include applying low power to the motor as a safety measure, and then increasing the electrical locking current in increments, until a temperature of the motor reaches a selected safety threshold or a shaft of the motor stops, whichever comes first.

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  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

L'invention concerne une commande de rotation pour une pompe submersible électrique (ESP). Dans une mise en œuvre possible, un dispositif de commande mesure de manière dynamique un état de moteur, tel qu'une température en cours, d'un moteur à courant alternatif mis hors circuit d'une pompe submersible électrique (ESP) et injecte un courant au moteur afin de verrouiller ou de ralentir une rotation passive du moteur provoquée par un écoulement pompé par une autre ESP dans le puits. Le dispositif de commande modifie de manière dynamique le courant pour maintenir la température du moteur au-dessous d'un seuil de sécurité, afin de verrouiller l'ESP pendant de longues durées. Le dispositif de commande peut appliquer un courant par certaine(s) phase(s) du moteur à courant alternatif, puis commuter les phases lorsqu'une température des enroulements du moteur associés à la phase de courant dépasse un seuil donné. Le dispositif de commande peut diminuer le courant pour obtenir l'équilibre souhaité de verrouillage de rotation ou de ralentissement en fonction de la hausse de température du moteur provoquée par l'application du courant de verrouillage.
PCT/US2014/053644 2014-09-02 2014-09-02 Commande de rotation pour une pompe submersible électrique WO2016036342A1 (fr)

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WO2021165501A1 (fr) * 2020-02-19 2021-08-26 Zilift Holdings Limited Systèmes de sécurité pour pompes submersibles électriques
US11365597B2 (en) 2019-12-03 2022-06-21 Ipi Technology Llc Artificial lift assembly
US11414967B2 (en) * 2017-01-05 2022-08-16 Halliburton Energy Services, Inc. Dynamic power optimization system and method for electric submersible motors

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US11414967B2 (en) * 2017-01-05 2022-08-16 Halliburton Energy Services, Inc. Dynamic power optimization system and method for electric submersible motors
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