EP0420751B1 - Verfahren zum Pumpen eines Gas/Flüssigkeitsgemisches aus einer Ölgewinnungsbohrung und Vorrichtung zur Durchführung des Verfahrens - Google Patents

Verfahren zum Pumpen eines Gas/Flüssigkeitsgemisches aus einer Ölgewinnungsbohrung und Vorrichtung zur Durchführung des Verfahrens Download PDF

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Publication number
EP0420751B1
EP0420751B1 EP90402660A EP90402660A EP0420751B1 EP 0420751 B1 EP0420751 B1 EP 0420751B1 EP 90402660 A EP90402660 A EP 90402660A EP 90402660 A EP90402660 A EP 90402660A EP 0420751 B1 EP0420751 B1 EP 0420751B1
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EP
European Patent Office
Prior art keywords
module
gas
motor
centrifugal
pumping
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.)
Expired - Lifetime
Application number
EP90402660A
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English (en)
French (fr)
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EP0420751A1 (de
Inventor
Daniel Sango
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Societe Nationale Elf Aquitaine Production SA
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Societe Nationale Elf Aquitaine Production SA
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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
    • E21B43/34—Arrangements for separating materials produced by the well
    • E21B43/38—Arrangements for separating materials produced by the well in the well
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S415/00—Rotary kinetic fluid motors or pumps
    • Y10S415/901—Drilled well-type pump
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S415/00—Rotary kinetic fluid motors or pumps
    • Y10S415/902—Rotary pump turbine publications
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S415/00—Rotary kinetic fluid motors or pumps
    • Y10S415/903—Well bit drive turbine

Definitions

  • the present invention relates to a method of pumping a liquid gas mixture in an oil extraction well and the device for implementing the method.
  • the production of hydrocarbons in an oil well is done, either as part of a naturally eruptive well, naturally, or artificially, and in this case the well must be activated.
  • the bottom pressure is sufficient to allow the fluid to rise to the surface.
  • the pressure is insufficient to allow extraction and this requires an assistance mode to ensure the ascent of the fluid to the surface. The well is then activated.
  • the eruptive wells after a certain period of operation, are no longer eruptive and they must also be activated.
  • the classic assembly consists of a centrifugal pump multicellular, an electric motor and a protector located between the motor and the pump and whose role is to seal around the motor shaft so that external fluids do not enter the motor .
  • Such a system allows, when the flow rates are relatively low, less than 300 to 400 m3 per day, to obtain a partial elimination of the gas which will allow the normal operation of the pump. This is possible provided that the percentage of free gas in the initial mixture is less than about 40% by volume. In this case, the separator reduces the percentage of free gas to around 10%.
  • a first aim of the invention is therefore to propose a method of pumping a two-phase liquid gas mixture allowing the exploitation of wells with a percentage of free gas in the initial mixture greater than about 40% by volume.
  • a second object of the invention is to propose a device allowing the implementation of the method and capable of solving both the problem of pumping mixtures whose gas quantities can range up to 99% by volume and the problem of cooling of the drive motor of the device.
  • Another object is to adapt the system according to the characteristics of the well by the use, either of a modular system, or of a fixed system with variable drive control.
  • the device comprises at least a second centrifugal separator module between the cooling module and the centrifugal pump module.
  • this object is achieved by the fact that the first module comprises at least two centrifugal separators mounted in series so that the axial output flow of one constitutes the input flow of the second and of the coupling means in rotation of the first and second separator.
  • the coupling means consist of an electromagnetic clutch.
  • the device comprises at each end a centering device relative to the extraction well.
  • FIG. 1A represents the upstream part of the pumping device allowing the implementation of the method according to the invention.
  • This device comprises a centralizing element (1) which may or may not be sealed, the central tube (100) of which directs the mixture of gas and fluid to a first centrifugal separator (3) whose outlet (30) for discharging the gases discharges the gases in the annular space between the external cylindrical envelope (32) of the separator and the tube (11) constituting the wall of the extraction well.
  • the fluid gas mixture the percentage of which has been lowered by the first separator, is discharged through an axial orifice (31) in the direction of a second separator (4) with a view to a further reduction in the percentage.
  • This separator (4) evacuates the gas through an orifice (40) in the annular space and the gas fluid mixture through an axial orifice (41) in the direction of a cooling module (10) constituted by a deviating element (6) the axial flow of the separator (4) through lateral orifices (60) towards an annular space formed between an external tube (10 A) and the successive external tubes (80,90,120) respectively of the protective modules (8), motor (9) and protector (12) mounted inside and coaxially with the tube (10 A) thus forming the cooling module (10).
  • the protective modules (8, 12) make it possible to ensure sealing at the level of the motor output shafts (9) upstream and downstream. In this way the motor element (9) is protected from contact with the fluids circulating in the device.
  • the fluid flowing in the annular space formed between the tube (10) and the external envelopes (80,90,120) respectively forming the first protector, the motor and the second protector ensure cooling even more efficient of the engine, that the percentage of gas in the mixture has been brought to the lowest possible level below 40%.
  • a diverter module (13) allows, thanks to the orifices (130) to bring the flow axially in the separating element (14) which follows the cooling module.
  • This separator (14) analogous to the other separators evacuates the gas through the orifice (140) towards the annular space between the outside of the envelope (142) of the separator device and the tubes (11) constituting the wall from the extraction well.
  • This separator (14) evacuates the axial flow of the mixture to a centrifugal pump (16) through the axial orifice (141).
  • the outlet of the centrifugal pump (16) is connected to a set of tubes (18) which makes it possible to raise the liquid practically separated from its gas to the surface.
  • the motor (9) drives by drive shafts which extend inside the device, both towards the separators located upstream and downstream and towards the centrifugal pump.
  • the two-phase mixture (2) enters the system and part of the gas is separated and discharged through the annular space at the level of the first centrifugal separator (3) with axial flow.
  • the remaining mixture enters the second separator (4) where the same operation is carried out.
  • the percentage of free gas at suction (2) being 99%
  • the percentage at the outlet of the first separator (3) can be reduced to around 60%.
  • the second separator will bring the percentage of gas to around 30%.
  • the fluid is thus sufficiently degassed to have sufficient heat capacity to ensure effective cooling of the engine.
  • the fluid leaving the second separator (4) passes into the engine cooling module and then enters the third separator (14) to complete its journey in the centrifugal pump and then be evacuated to the surface inside the train tube (18).
  • the gas on its side joins the surface through the annular space formed between the tube train (18) and the tubes (11) constituting the wall of the extraction well.
  • the third separator will bring the percentage of gas from 30% at the inlet to a percentage compatible with the proper functioning of the pump (16) generally less than 8%.
  • the third separator (14) is optional and depends on the percentage of gas contained in the initial two-phase liquid.
  • the two separators (3,4) will be used, but the last separator (14) may possibly be dispensed with.
  • only one separator (3) will be used upstream of the motor and a second separator (14) downstream of the motor.
  • the drive shafts of the first and second separators (3,4) are mechanically connected in rotation by a sleeve (33).
  • these shafts can be mechanically connected by an electromagnetic clutch controlled from the surface to implement, as required, one or two separator modules upstream of the engine.
  • FIG. 2 shows a sealed centering element (1) used upstream of the device.
  • This centering element consists of anchoring corners (101) connected, on the one hand to the external tube (11) of the extraction well by seals (103), and on the other hand to the internal tube ( 100) for suction of the two-phase liquid (2) by seals (102), so as to channel the two-phase mixture towards the inside of the tube (100).
  • the leaktight centering device (17) located downstream of the pumping device will only comprise spacers for holding the tubes (18) to allow the flow of gas outside the tube (18).
  • a non-watertight centralizer (1) can be used.
  • the output centering device (17) it is possible, if necessary, to use a waterproof centering device.

Landscapes

  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Centrifugal Separators (AREA)
  • Gas Separation By Absorption (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (6)

  1. Verfahren zum Pumpen einer zweiphasigen Mischung aus Flüssigkeit und Gas in einem Förderschacht (11), deren Prozentsatz des Ausgangsgases mehr als etwa 40 Volumenprozent beträgt, dadurch gekennzeichnet, daß es darin besteht:
    - den Prozentsatz des freien Gases unter 40 Prozent durch Verwendung wenigstens eines ersten Trennschleudermoduls (3, 4) abzusenken,
    - den Antriebsmotor durch eine Ringströmung der Mischung, die von dem ersten Trennmodul (3, 4) abgeleitet wird, um den Motor (9) herum abzukühlen, wobei der Gasanteil der Mischung unter 40 Prozent gehalten wurde, um seine Wärmekapazität und seine Durchgangsgeschwindigkeit um den Motor herum zu steigern,
    - den Prozentsatz des Gases unter etwa 10 Volumenprozent durch Verwendung wenigstens eines zweiten Trennschleudermoduls (14) abzusenken,
    - das so erhaltene Fluid durch eine von dem Motor (9) angetriebene Zentrifugalpumpe (16) zu pumpen.
  2. Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, daß sie aufweist:
    - ein erstes Trennschleudermodul (3) für Gas in einer Mischung mit axialem Durchsatz, das in einem zylindrischen Mantel (32) angeordnet ist, wobei die abgetrennten Gase nach außen aus dem Mantel abgeführt werden, und ein Abkühlmodul (6, 10, 13), das einen externen Mantel (10) in abdichtender Verbindung mit dem Mantel des ersten Trennmoduls und im Inneren einen zweiten zylindrischen koaxialen Mantel (80, 90, 120) aufweist, der einen Elektromotor (9) enthält, welcher auf beiden Seiten in der Längsrichtung von Schutzeinrichtungen (8, 12) umgeben ist, welche die Abdichtungen stromauf und stromab auf der Höhe der Antriebsachsen des Motors gewährleisten,
    - Einrichtungen (6) zum Umlenken des axialen Durchsatzes außerhalb des zweiten Mantels (80, 90, 120) beim Eintritt des Kühlmoduls (10) und
    - Einrichtungen (13) beim Austritt des Kühlmoduls (10), um den Durchsatz in der Achse eines Zentrifugalpumpmoduls (16) zu halten, das mit einem Fluidabführungsrohrstrang (18) verbunden ist, wobei die Pump- und Trennmodule (3) von der Achse des Motors (9) angetrieben werden.
  3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß sie wenigstens ein zweites Trennschleudermodul (14) zwischen dem Kühlmodul (10) und dem Zentrifugalpumpenmodul (16) aufweist.
  4. Vorrichtung nach den Ansprüchen 2 oder 3, dadurch gekennzeichnet, daß das erste Modul wenigstens zwei Trennschleudern (3, 4), die in Reihe so angeordnet sind, daß der axiale Ausgangsdurchsatz des einen den Durchsatz am Eintritt des zweiten bildet, und Einrichtungen (33) für eine Drehkupplung der Antriebswelten der einen und der anderen Trennschleuder aufweist.
  5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Kupplungseinrichtungen von einer elektromagnetischen Kupplung gebildet werden, die von der Oberfläche aus gesteuert wird.
  6. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sie an jedem Ende eine Zentriereinrichtung (1, 17) bezüglich des Förderschachtes (11) hat.
EP90402660A 1989-09-29 1990-09-27 Verfahren zum Pumpen eines Gas/Flüssigkeitsgemisches aus einer Ölgewinnungsbohrung und Vorrichtung zur Durchführung des Verfahrens Expired - Lifetime EP0420751B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8912759A FR2652610B1 (fr) 1989-09-29 1989-09-29 Procede de pompage de melange liquide gaz dans un puits d'extraction petrolier et dispositif de mise en óoeuvre du procede.
FR8912759 1989-09-29

Publications (2)

Publication Number Publication Date
EP0420751A1 EP0420751A1 (de) 1991-04-03
EP0420751B1 true EP0420751B1 (de) 1993-07-21

Family

ID=9385947

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90402660A Expired - Lifetime EP0420751B1 (de) 1989-09-29 1990-09-27 Verfahren zum Pumpen eines Gas/Flüssigkeitsgemisches aus einer Ölgewinnungsbohrung und Vorrichtung zur Durchführung des Verfahrens

Country Status (7)

Country Link
US (1) US5173022A (de)
EP (1) EP0420751B1 (de)
BR (1) BR9004880A (de)
DE (1) DE69002296T2 (de)
FR (1) FR2652610B1 (de)
NO (1) NO300515B1 (de)
OA (1) OA09264A (de)

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US5456837A (en) * 1994-04-13 1995-10-10 Centre For Frontier Engineering Research Institute Multiple cyclone apparatus for downhole cyclone oil/water separation
DE69516022D1 (de) * 1995-06-07 2000-05-04 For Engineering Research Inc C Verfahren zum zykloneabscheiden im bohrloch
US6082452A (en) * 1996-09-27 2000-07-04 Baker Hughes, Ltd. Oil separation and pumping systems
AU7987298A (en) * 1997-06-24 1999-01-04 Baker Hughes Incorporated Cyclonic separator assembly
US6202744B1 (en) 1997-11-07 2001-03-20 Baker Hughes Incorporated Oil separation and pumping system and apparatus
US6138757A (en) * 1998-02-24 2000-10-31 Bj Services Company U.S.A. Apparatus and method for downhole fluid phase separation
US6257333B1 (en) * 1999-12-02 2001-07-10 Camco International, Inc. Reverse flow gas separator for progressing cavity submergible pumping systems
US7150600B1 (en) 2002-10-31 2006-12-19 Wood Group Esp, Inc. Downhole turbomachines for handling two-phase flow
US7462225B1 (en) 2004-09-15 2008-12-09 Wood Group Esp, Inc. Gas separator agitator assembly
US7188669B2 (en) * 2004-10-14 2007-03-13 Baker Hughes Incorporated Motor cooler for submersible pump
US20060245957A1 (en) * 2005-04-14 2006-11-02 Wood Group Esp, Inc. Encapsulated bottom intake pumping system
US7461692B1 (en) 2005-12-15 2008-12-09 Wood Group Esp, Inc. Multi-stage gas separator
US8727016B2 (en) 2010-12-07 2014-05-20 Saudi Arabian Oil Company Apparatus and methods for enhanced well control in slim completions
US8613311B2 (en) 2011-02-20 2013-12-24 Saudi Arabian Oil Company Apparatus and methods for well completion design to avoid erosion and high friction loss for power cable deployed electric submersible pump systems
US9261096B2 (en) 2011-07-29 2016-02-16 Regal Beloit America, Inc. Pump motor combination
US11028683B1 (en) * 2020-12-03 2021-06-08 Stoneview Solutions LLC Downhole pump gas eliminating seating nipple system
WO2022170414A1 (en) 2021-02-12 2022-08-18 Drill Safe Systems Inc. Drilling downhole regulating devices and related methods
US12292059B2 (en) 2022-03-08 2025-05-06 Inflow Systems Inc. Intakes and gas separators for downhole pumps, and related apparatuses and methods

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Also Published As

Publication number Publication date
US5173022A (en) 1992-12-22
BR9004880A (pt) 1991-09-10
DE69002296T2 (de) 1994-02-17
DE69002296D1 (de) 1993-08-26
NO300515B1 (no) 1997-06-09
FR2652610B1 (fr) 1992-01-03
NO904242D0 (no) 1990-09-28
FR2652610A1 (fr) 1991-04-05
EP0420751A1 (de) 1991-04-03
NO904242L (no) 1991-04-02
OA09264A (fr) 1992-08-31

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