EP4134512A1 - Dispositif de compensation de volume - Google Patents

Dispositif de compensation de volume Download PDF

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Publication number
EP4134512A1
EP4134512A1 EP22185953.1A EP22185953A EP4134512A1 EP 4134512 A1 EP4134512 A1 EP 4134512A1 EP 22185953 A EP22185953 A EP 22185953A EP 4134512 A1 EP4134512 A1 EP 4134512A1
Authority
EP
European Patent Office
Prior art keywords
oil
chamber
volume compensation
heavy oil
light oil
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP22185953.1A
Other languages
German (de)
English (en)
Other versions
EP4134512C0 (fr
EP4134512B1 (fr
Inventor
Ahmad Mohammadi
Andy Limanowka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oil Dynamics GmbH
Original Assignee
Oil Dynamics GmbH
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 Oil Dynamics GmbH filed Critical Oil Dynamics GmbH
Publication of EP4134512A1 publication Critical patent/EP4134512A1/fr
Application granted granted Critical
Publication of EP4134512C0 publication Critical patent/EP4134512C0/fr
Publication of EP4134512B1 publication Critical patent/EP4134512B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/18—Lubricating

Definitions

  • the PCT/US2017/064498 therefore proposes a spring-loaded piston that slides relative to a pressurized gas chamber.
  • the disadvantage here is that the compressibility of the gas limits the volume compensation, and the pressure in the gas would ensure a pressure increase in the working oil if the volume to be compensated for is large.
  • a servomotor is provided, which moves the piston used for volume compensation, so that the working oil pressure cannot rise too much.
  • This also requires pressure measurement and control.
  • Such a system is complicated, expensive and prone to failure, especially because of the high temperatures.
  • the volume compensation device has a volume compensation chamber which is connected to the working oil chamber and has a light oil area for volume compensation of the light oil and a heavy oil area with a heavy oil or a fluid similar to heavy oil.
  • the boundary between the light oil area and the heavy oil area can be moved and the heavy oil can flow into an expansion chamber that has another heavy oil area that adjoins a borehole fluid area, with the borehole fluid being able to flow in and out of the expansion chamber via an equalization opening.
  • the idea of this alternative is that there are two chambers, one for the confluence of light and heavy oil and a separate one for the confluence of heavy oil and well water (or other well fluid lighter than heavy oil, e.g. petroleum).
  • the encapsulated volume compensating device 1 is used to provide volume compensation for a light oil 4 or a fluid similar to light oil used for lubrication in a working oil chamber 5 when it expands as a result of heating or contracts again when it cools down.
  • the volume changes are due to three causes: Firstly, the temperature difference between the temperature when filling the light oil 4 and the temperature when the device 1 is introduced into the hot well water 6 of the borehole 2 . This temperature difference is approximately 80 to 150°C. Then, the electric motor 21 generates heat, causing a temperature difference of about 50°C. The axial bearing 19 then again contributes a temperature difference of approx. 30° C., but can lead to the highest temperature in its area. All of this takes place in an already hot environment, since geothermal energy is particularly effective when the hottest possible well water can be pumped.
  • a heat exchanger 28 is provided, the function of which is to cool the light oil 4 .
  • the heat exchanger 28 is arranged within the well wall 38 between the working oil chamber 5 and the well fluid 6 .
  • a pump 29 is arranged, for example on the pump shaft 20. It drives an oil circuit 30 (small arrows), which supplies the oil to the heat exchanger 28. In this way, above all, the strong heat generated by the axial bearing 19 is dissipated and it is thereby avoided that the light oil 4 heats up too much and loses some of its lubricating properties.
  • FIG 3 shows an alternative multi-chamber system in which the chambers are arranged differently.
  • the working oil chamber 5 between the volume compensation chamber 10 and the expansion chamber 12.
  • the axial bearing 19 and the electric motor 21 are arranged in the working oil chamber 5.
  • the light oil 4 expands in the working oil chamber 5, it is pressed down through the connection 16 into the volume compensation chamber 10, in which the light oil area 10' and the heavy oil area 10" are located.
  • a piston 9 is arranged here, which moves up and down in a cylinder 8 according to the change in volume of the light oil 4.
  • the piston 9 can also be supported by a spring.
  • the illustrated exemplary embodiments can of course vary, as can the exemplary embodiments according to FIG 2 and 3 be provided with a device to catch a leak or have a cooling device.
  • the 3 could for example be arranged between the expansion chamber 12 and the working oil chamber 5, a device for catching a leak.
  • Other variations, such as a system made up of two chambers, are also possible by transferring features from one example to the other.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Compressor (AREA)
EP22185953.1A 2021-07-30 2022-07-20 Dispositif de compensation de volume Active EP4134512B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021119889.5A DE102021119889A1 (de) 2021-07-30 2021-07-30 Volumenausgleichsvorrichtung

Publications (3)

Publication Number Publication Date
EP4134512A1 true EP4134512A1 (fr) 2023-02-15
EP4134512C0 EP4134512C0 (fr) 2024-12-11
EP4134512B1 EP4134512B1 (fr) 2024-12-11

Family

ID=82656264

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22185953.1A Active EP4134512B1 (fr) 2021-07-30 2022-07-20 Dispositif de compensation de volume

Country Status (2)

Country Link
EP (1) EP4134512B1 (fr)
DE (1) DE102021119889A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1970484A (en) * 1933-03-30 1934-08-14 Reda Pump Company Oil filled submergible electric motor
DE1186141B (de) 1963-02-21 1965-01-28 Klein Schanzlin & Becker Ag Einrichtung zum Druckausgleich fuer fluessigkeitsgefuellte elektrische Unterwassermotoren
WO2016032521A1 (fr) 2014-08-29 2016-03-03 Ge Oil & Gas Esp, Inc. Chambre de détente de fluide à soufflet protégé
WO2017096103A1 (fr) 2015-12-04 2017-06-08 General Electric Company Ensemble à joint d'étanchéité pour système de pompage submersible et procédé associé
US20200095992A1 (en) * 2018-09-20 2020-03-26 Baker Hughes Oilfield Operations Llc Isolated Chamber For Mechanical Face Seal Leakage In Submersible Well Pump Assembly

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3182214A (en) * 1962-12-26 1965-05-04 Borg Warner Submersible motor seal section
US3502919A (en) * 1969-01-02 1970-03-24 Borg Warner Submersible motor seal section
US3854064A (en) * 1973-05-10 1974-12-10 Trw Inc Mechanical seal isolator
DE3120232C2 (de) 1981-05-21 1985-03-21 Klein, Schanzlin & Becker Ag, 6710 Frankenthal Druckausgleichseinrichtung für den Elektromotor eines gekapselten Kreiselpumpen-Motor-Aggregates
US4462765A (en) * 1981-12-04 1984-07-31 Rodkin Valentin V Liquid-proofing system for an electric motor of a deep-well pumping unit
US9763037B2 (en) 2011-05-18 2017-09-12 Medappit Llc Network architecture for synchronized display
EP3555482B1 (fr) 2016-12-16 2025-11-12 Baker Hughes Holdings LLC Compensateur de pression de lubrifiant de moteur électrique destiné à un moteur de pompe submersible

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1970484A (en) * 1933-03-30 1934-08-14 Reda Pump Company Oil filled submergible electric motor
DE1186141B (de) 1963-02-21 1965-01-28 Klein Schanzlin & Becker Ag Einrichtung zum Druckausgleich fuer fluessigkeitsgefuellte elektrische Unterwassermotoren
WO2016032521A1 (fr) 2014-08-29 2016-03-03 Ge Oil & Gas Esp, Inc. Chambre de détente de fluide à soufflet protégé
WO2017096103A1 (fr) 2015-12-04 2017-06-08 General Electric Company Ensemble à joint d'étanchéité pour système de pompage submersible et procédé associé
US20200095992A1 (en) * 2018-09-20 2020-03-26 Baker Hughes Oilfield Operations Llc Isolated Chamber For Mechanical Face Seal Leakage In Submersible Well Pump Assembly

Also Published As

Publication number Publication date
DE102021119889A1 (de) 2023-02-02
EP4134512C0 (fr) 2024-12-11
EP4134512B1 (fr) 2024-12-11

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