WO2013130536A1 - Procédé de détection et de rupture de bouchons de gaz dans une pompe submersible électrique - Google Patents

Procédé de détection et de rupture de bouchons de gaz dans une pompe submersible électrique Download PDF

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Publication number
WO2013130536A1
WO2013130536A1 PCT/US2013/027926 US2013027926W WO2013130536A1 WO 2013130536 A1 WO2013130536 A1 WO 2013130536A1 US 2013027926 W US2013027926 W US 2013027926W WO 2013130536 A1 WO2013130536 A1 WO 2013130536A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
gas lock
time
detected
signal
Prior art date
Application number
PCT/US2013/027926
Other languages
English (en)
Inventor
Lissett BARRIOS
David Earl HUGG
Original Assignee
Shell Oil Company
Shell Internationale Research Maatschappij B.V.
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 Shell Oil Company, Shell Internationale Research Maatschappij B.V. filed Critical Shell Oil Company
Priority to CN201380011908.6A priority Critical patent/CN104160155B/zh
Priority to MYPI2014702214A priority patent/MY183956A/en
Priority to US14/381,773 priority patent/US20150056082A1/en
Priority to GB1413388.8A priority patent/GB2513062A/en
Priority to AU2013226214A priority patent/AU2013226214B2/en
Publication of WO2013130536A1 publication Critical patent/WO2013130536A1/fr
Priority to NO20141075A priority patent/NO20141075A1/no

Links

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
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/007—Preventing loss of prime, siphon breakers
    • 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
    • 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
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
    • F04B47/06—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps having motor-pump units situated at great depth
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/10—Other safety measures
    • 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
    • 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
    • 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
    • F04D15/0088—Testing machines
    • 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
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
    • F04D15/0236—Lack of liquid level being detected by analysing the parameters of the electric drive, e.g. current or power consumption
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D31/00—Pumping liquids and elastic fluids at the same time
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/001—Preventing vapour lock
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2203/00—Motor parameters
    • F04B2203/02—Motor parameters of rotating electric motors
    • F04B2203/0201—Current

Definitions

  • the invention relates to detecting and breaking gas locks in electrical submersible pumps. Background
  • Electrical submersible pumps are used in deepwater oil and gas production settings to provide artificial lift such that the oil and gas can be raised to the surface for further processing, storage and/or transport.
  • fluid property changes of the oil/gas mixture cause the liquid level inside the casing to drop and consequently gas lock conditions can occur where the pump takes in sufficient quantities of gas to effectively lock up the pump and prevent fluid from flowing through the pump and out the discharge line.
  • the conventional solution to this problem is to stop the pump to allow the system to stabilize, and then restart the pump once the system returns to normal conditions, usually by the gas flowing up the discharge line as described in US 5,015,151.
  • This solution results in increased downtime, an increased number of pump starts, and consequently decreased pump longevity (due to stresses at start-up).
  • pump components can be damaged and/or the pump motor can overheat.
  • the invention provides a method of breaking a gas lock in an electrical submersible pump, comprising: a) monitoring a derived value related to the electrical current used by a pump motor connected to and providing power to the pump; b) comparing the derived value to a threshold value to detect the occurrence of gas lock conditions; and when those conditions are detected; c) sending an override signal to reduce the speed of the pump for a set period of time; and d) comparing the derived value related to the electrical current to the threshold value at the end of the set period of time, and if gas lock conditions are not detected, then increasing the speed of the pump to return to normal operating conditions.
  • Figure 1 depicts an embodiment of the control system.
  • Figure 2 depicts an embodiment of the method showing the various steps on a timeline Detailed Description
  • Gas locking conditions are characterized by a sudden drop in the load on the pump motor when gas enters the pump. Continued operations under gas lock conditions can damage the electrical submersible pump, seal or motor, and it is important to detect gas lock conditions and adjust the conditions as quickly as possible to break the gas lock.
  • Gas lock conditions can be brought about by any of several reasons including an increased gas volume fraction in the oil/gas mixture, a pump that is operating at too high of a flow rate such that the liquid level is dropped below the pump intake, and rapid fluid property changes due to hot oil reduction, gas/water slugging, etc..
  • the method to detect and break gas lock conditions comprises an initial step of monitoring the operation of the pump and comparing the operation with one or more predefined limits or alarms that would indicate gas lock conditions.
  • a number of variables may be monitored, and the measurements may be made at the surface, subsea or in the wellbore.
  • a preferred measurement is the running standard deviation of the electrical submersible pump motor amps.
  • the predefined limit or alarm may be a hard limit that is set based on the design of the system or it may be as in the example of running standard deviation based on the deviation from normal or past operation of the system.
  • an override signal which is normally at maximum frequency may be reduced to a pre-defined minimum frequency value.
  • the override when activated, may immediately reduce to a value that corresponds to the current frequency of the electric submersible pump. After that, the override may be ramped down gradually to its minimum value, to prevent a too-rapid change in load on the pump.
  • the use of a low signal selector would provide for the reduction in the signal to the pump motor to reduce the flow through the pump. As described above, damage can occur to the pump if action is not taken as soon as possible, so this step of sending the override signal should occur quickly after the gas lock conditions are encountered.
  • a timer is set to maintain the low flow for a set period of time. This amount of time is configurable and can be set based on the design of the system and the characteristics of the well. In addition, a manual override of this timer may be present so that an operator can decide to bypass the set time period and attempt to increase the flow rate before the end of the time period.
  • the appropriate variables are again measured and compared to the alarm limit to ensure that the gas lock conditions are no longer present in the system. If the pump is still gas locked then the pump is maintained at low flow for another set period of time. If the pump is not gas locked then the pump flow rate will be increased. This may be accomplished by increasing the frequency of the signal from the pressure controller to the pump and resetting the override signal to a maximum frequency signal.
  • the flow rate may be increased at a set ramping up rate to prevent the system from ramping up too quickly and going back into gas lock conditions.
  • the ramping up rate is a predetermined rate, but it may be configurable or able to be set by the operator.
  • Figure 1 shows a standard pressure controller 10 that is used to control the pump operations during normal conditions.
  • the override signal 50 is maintained at an operating frequency during normal operation, but reduced to a minimum frequency when gas lock conditions are encountered.
  • the signals from the pressure controller and the override signal are passed through a low signal selector 20 before being passed to a frequency ramp limiting controller 30.
  • the signal from 30 is passed to the motor controller 40 which controls the motor driving the electrical submersible pump.
  • an anti-reset windup signal 60 is included in the system to prevent a bump when the control system switches from the override signal to pressure control.
  • Figure 2 shows the operation of the method of this invention.
  • the override signal is maintained at an operated frequency.
  • this signal is reduced to a minimum frequency signal to provide minimum flow through the pump.
  • the override is reset and is slowly increased to the maximum frequency.
  • the pressure controller regains control of the pump since both signals pass through the low signal selector and normal, stable operations are continued unless gas lock conditions are encountered again.
  • This invention results in a controller that is able to deal with gas lock conditions and break that gas lock without repeated shutdown of the electrical submersible pump that can result in decreased pump longevity caused by an increased number of pump starts.

Landscapes

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

Abstract

L'invention concerne un procédé de rupture d'un bouchon de gaz dans une pompe submersible électrique, qui consiste à: a) surveiller une valeur mesurée liée au courant électrique utilisé par un moteur de pompe raccordé à la pompe et alimentant celle-ci en énergie; b) comparer la valeur mesurée à une valeur seuil pour détecter des conditions d'apparition de bouchons de gaz; et lorsque ces conditions sont détectées, c) envoyer un signal prioritaire pour réduire immédiatement le débit vers la pompe pendant un laps de temps défini; et d) comparer la valeur mesurée associée au courant électrique à la valeur seuil à la fin du laps de temps défini et, si des conditions d'apparition de bouchons de gaz ne sont pas détectées, augmenter alors l'alimentation électrique de la pompe.
PCT/US2013/027926 2012-03-02 2013-02-27 Procédé de détection et de rupture de bouchons de gaz dans une pompe submersible électrique WO2013130536A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CN201380011908.6A CN104160155B (zh) 2012-03-02 2013-02-27 检测并且打破电动潜水泵中的气锁的方法
MYPI2014702214A MY183956A (en) 2012-03-02 2013-02-27 Method of detecting and breaking gas locks in an electric submersible pump
US14/381,773 US20150056082A1 (en) 2012-03-02 2013-02-27 Method of detecting and breaking gas locks in an electric submersible pump
GB1413388.8A GB2513062A (en) 2012-03-02 2013-02-27 Method of detecting and breaking gas locks in an electric submersible pump
AU2013226214A AU2013226214B2 (en) 2012-03-02 2013-02-27 Method of detecting and breaking gas locks in an electric submersible pump
NO20141075A NO20141075A1 (no) 2012-03-02 2014-09-05 Fremgangsmåte for å detektere og bryte gasslås i en elektrisk nedsenkbar pumpe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201261605794P 2012-03-02 2012-03-02
US61/605,794 2012-03-02

Publications (1)

Publication Number Publication Date
WO2013130536A1 true WO2013130536A1 (fr) 2013-09-06

Family

ID=49083221

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2013/027926 WO2013130536A1 (fr) 2012-03-02 2013-02-27 Procédé de détection et de rupture de bouchons de gaz dans une pompe submersible électrique

Country Status (7)

Country Link
US (1) US20150056082A1 (fr)
CN (1) CN104160155B (fr)
AU (1) AU2013226214B2 (fr)
GB (1) GB2513062A (fr)
MY (1) MY183956A (fr)
NO (1) NO20141075A1 (fr)
WO (1) WO2013130536A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160084254A1 (en) * 2013-04-22 2016-03-24 Schlumberger Technology Corporation Gas Lock Resolution During Operation Of An Electric Submersible Pump
US11448206B2 (en) * 2020-03-31 2022-09-20 Jesus S. Armacanqui Gas lock removal method for electrical submersible pumps

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016094530A1 (fr) 2014-12-09 2016-06-16 Schlumberger Canada Limited Détection d'événement de pompe submersible électrique
NO339736B1 (en) * 2015-07-10 2017-01-30 Aker Subsea As Subsea pump and system and methods for control
CA2989292A1 (fr) * 2015-07-10 2017-01-19 Aker Solutions As Pompe sous-marine ainsi que systeme et procedes de commande
US10830024B2 (en) * 2017-06-24 2020-11-10 Ge Oil & Gas Esp, Inc. Method for producing from gas slugging reservoirs
DE102018006877A1 (de) * 2018-08-30 2020-03-05 Fresenius Medical Care Deutschland Gmbh Pumpvorrichtung zum Pumpen von Flüssigkeiten aufweisend eine Zentrifugalpumpe mit radial pumpendem Pumpenrad mit hohlem Zentrum
JP7283980B2 (ja) * 2019-05-31 2023-05-30 三菱重工業株式会社 ポンプシステム、及びポンプシステムの制御方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5015151A (en) * 1989-08-21 1991-05-14 Shell Oil Company Motor controller for electrical submersible pumps
US6684946B2 (en) * 2002-04-12 2004-02-03 Baker Hughes Incorporated Gas-lock re-prime device for submersible pumps and related methods
US7798215B2 (en) * 2007-06-26 2010-09-21 Baker Hughes Incorporated Device, method and program product to automatically detect and break gas locks in an ESP
US7869978B2 (en) * 2002-09-27 2011-01-11 Unico, Inc. Determination and control of wellbore fluid level, output flow, and desired pump operating speed, using a control system for a centrifugal pump disposed within the wellbore

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CN2045778U (zh) * 1988-12-14 1989-10-11 中原石油勘探局采油工艺研究所 防气抽油泵
US5284422A (en) * 1992-10-19 1994-02-08 Turner John M Method of monitoring and controlling a well pump apparatus
CN200964943Y (zh) * 2006-11-09 2007-10-24 刘洪刚 抽油泵防气锁阀
US8400093B2 (en) * 2009-08-27 2013-03-19 Baker Hughes Incorporated Device, computer program product and computer-implemented method for backspin detection in an electrical submersible pump assembly

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5015151A (en) * 1989-08-21 1991-05-14 Shell Oil Company Motor controller for electrical submersible pumps
US6684946B2 (en) * 2002-04-12 2004-02-03 Baker Hughes Incorporated Gas-lock re-prime device for submersible pumps and related methods
US7869978B2 (en) * 2002-09-27 2011-01-11 Unico, Inc. Determination and control of wellbore fluid level, output flow, and desired pump operating speed, using a control system for a centrifugal pump disposed within the wellbore
US7798215B2 (en) * 2007-06-26 2010-09-21 Baker Hughes Incorporated Device, method and program product to automatically detect and break gas locks in an ESP

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160084254A1 (en) * 2013-04-22 2016-03-24 Schlumberger Technology Corporation Gas Lock Resolution During Operation Of An Electric Submersible Pump
US10197060B2 (en) * 2013-04-22 2019-02-05 Schlumberger Technology Corporation Gas lock resolution during operation of an electric submersible pump
US11448206B2 (en) * 2020-03-31 2022-09-20 Jesus S. Armacanqui Gas lock removal method for electrical submersible pumps

Also Published As

Publication number Publication date
US20150056082A1 (en) 2015-02-26
NO20141075A1 (no) 2014-09-05
GB201413388D0 (en) 2014-09-10
CN104160155A (zh) 2014-11-19
MY183956A (en) 2021-03-17
CN104160155B (zh) 2017-06-06
AU2013226214B2 (en) 2016-03-10
AU2013226214A1 (en) 2014-08-21
GB2513062A (en) 2014-10-15

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