EP0702156A1 - Mehrphasiges Pumpensystem mit Regelkreis - Google Patents

Mehrphasiges Pumpensystem mit Regelkreis Download PDF

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Publication number
EP0702156A1
EP0702156A1 EP95401796A EP95401796A EP0702156A1 EP 0702156 A1 EP0702156 A1 EP 0702156A1 EP 95401796 A EP95401796 A EP 95401796A EP 95401796 A EP95401796 A EP 95401796A EP 0702156 A1 EP0702156 A1 EP 0702156A1
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EP
European Patent Office
Prior art keywords
pump
multiphase
pumping system
glr
fluid
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
EP95401796A
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English (en)
French (fr)
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EP0702156B1 (de
Inventor
Régis Vilagines
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IFP Energies Nouvelles IFPEN
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IFP Energies Nouvelles IFPEN
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Publication date
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Publication of EP0702156A1 publication Critical patent/EP0702156A1/de
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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
    • F04D31/00—Pumping liquids and elastic fluids at the same time
    • 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

Definitions

  • the present invention relates to a multiphase pumping system with recycling loop.
  • the pumping system according to the invention is suitable for transporting, via pipes, a fluid comprising at least one liquid phase and at least one gaseous phase, the volumetric ratio of the gaseous phase to the liquid phase (generally designated by GLR), may have wide variations.
  • Such a pumping system finds applications in particular in the field of petroleum production where it is a question of transporting to a determined place of destination, petroleum effluents extracted from an underground deposit, and in particular for the exploitation of so-called offshore deposits.
  • Existing multiphase pumping systems include a multiphase pump such as that described in patent FR 2,665,224 filed by the applicant, capable of applying to a multiphase fluid, a high pressure as long as the volumetric ratio GLR does not exceed a maximum value determined.
  • a multiphase pump such as that described in patent FR 2,665,224 filed by the applicant, capable of applying to a multiphase fluid, a high pressure as long as the volumetric ratio GLR does not exceed a maximum value determined.
  • GLR ratio of the fluid to be transported is likely to exceed this maximum value, as occurs in petroleum exploitation when the fluid produced by a production well has pockets or plugs of gas
  • means of pump are associated with the pump. regulation. These regulating means are adapted to restrict the range of possible variation of the GLR ratio to make it compatible with that admitted by the pump.
  • a known regulating means described for example in French patent applications EN 91 / 16.230 and 92 / 05.617 comprises for example a buffer tank receiving the fluids produced by the deposit and provided with one or more perforated sampling tubes capable of automatically dosing the phase ratio admitted at the pump inlet.
  • the recycling loop pumping system makes it possible to communicate to multiphase effluents originating from a source and comprising at least one liquid phase and at least one gaseous phase and whose volumetric ratio GLR of gaseous phases to liquid phases is likely to vary, an increase in pressure sufficient to transport them to a specific place of destination.
  • the pumping system comprises a multiphase pump and a recycling loop and it is characterized in that it comprises in combination a bypass means for deriving directly via the recycling loop, part of the multiphase fluid available at the outlet of the pump towards the inlet thereof and means for controlling the multiphase fluid derived in the loop, so as to decrease the flow rate of the fluid transported by the pipe and to increase the possible operating speed of said pump.
  • the bypass means is a shaped element for distributing the liquid phases of the multiphase effluents which are applied to it more towards a first outlet than towards a second outlet (for example in the form of T or Y), this first outlet, which is richer in liquid phases, being connected to the recycling loop so as to reduce to a certain extent the GLR ratio of the multiphase fluid recycled at the inlet of the pump and facilitate its operation.
  • the control means may include, for example, a valve, a buffer tank or an element for using part of the energy of the multiphase effluents derived.
  • the pumping system can also include an assembly for controlling the control means, in order to apply regulation as a function of the pumping conditions.
  • the pumping system according to the invention by partial recycling of part of the multiphase effluents from a pump, allows the latter to better take care of effluents whose volumetric ratio GLR is relatively high.
  • GLR volumetric ratio
  • the pumping system comprises a multiphase pump 1 of a known type, such as the pump described in the aforementioned patent FR 2,665,224, associated with a drive motor 2.
  • the inlet of the pump 1 is connected by a pipe 3, to a source of multiphase fluids.
  • This source is for example an oil production well which produces liquid effluents: oil and water, and gaseous effluents.
  • the pump 1 is adapted to apply to the effluents a pressure increase ⁇ P sufficient to transport them to a place of destination as long as the volumetric ratio of gas to liquid or GLR is maintained within a certain defined range of variation.
  • a bypass element 5 is inserted, making it possible to divide the multiphase flow coming from the pump into two parts.
  • a T-shaped branching of a known type is used and we connect its bent branch 51 to a pipe 6 for routing to the place of destination.
  • the straight branch 52 of the T is connected at one end to the pipe 4.
  • a recycling circuit or loop 7 provided with a control valve 8 is connected at a first end, to the straight branch 52 of the T and, at its opposite end, to the inlet pipe of the pump via a mixing member 9 of a known type such as a mixer ejector which allows part of the energy of the recycled effluents to be used for favor their mixing with those from line 3, for example of the type described in patent CH 680463.
  • the control valve 8 is controlled by a processor 10 adapted to modify the recycled flow rate as a function of variations in pumping conditions.
  • the diagram in FIG. 3 corresponds to that of a POSEIDON type P 300 multiphase helical-axial pump, for example such as that described in the above-mentioned patent FR 2 665 224, in the absence of any recycling. It shows the range of possible variation of the pressure rise ⁇ P (in MPa) applied by the pump as a function of the flow rate D at suction for different rotation speeds.
  • the suction pressure is 1.5 MPa.
  • the volumetric ratio GLR of the sucked effluents is 8.
  • FIG. 4 shows that direct recycling of part of the effluent delivered by the pump allows, for an increase in pressure ⁇ P of 0.75 MPa, to increase its hourly flow rate to 400 m3 / h at a speed of rotation of 4500 rpm (point b1) and at the same time, to widen in notable proportions, the pressure increase ⁇ P that the pump is able to apply to the sucked effluents if we increase its speed training. It can be seen that this increase in pressure in the case under consideration can reach approximately 1.55 MPa at a rotation speed of 5200 rpm.
  • a divider branch 5 capable by construction of diverting towards the recycling circuit a multiphase fraction whose GLR ratio is lowered leads in the case illustrated by the diagram of Fig. 4 to lower the value of the GLR ratio to 6 effluent at suction.
  • a separator downstream of the pump to remove practically all of the gas from the recycled effluents, as described in the aforementioned patent FR 2,417,057.
  • the processor 10 is used to control the opening of the valve 8 as a function of the values of the coefficients a, b and of the total flow rate Q of the well for example.
  • this recycling loop makes it possible, as we have seen, to increase the range of variation of the ratio GLR of the effluents that a multiphase pump can accept, and also an extension of the possible variation margin of the pressure increase ⁇ P communicated by the pump. It can also be noted that the presence of this recycling loop and of the regulating valve 8 also contributes to giving great flexibility to the pumping system.
  • the reinjection under pressure of the recycled fluid helps to homogenize the effluents at the inlet of pump 1.
  • the recycling of a fraction of the effluents allows the pump to operate correctly even with sources of reduced flow, which is particularly advantageous in oil production when wells are nearing depletion.
  • the variation in the recycling rate obtained by controlling the valve 8 makes it possible to make the start-up and operation of the pump more gradual, in particular in the event of an unexpected shutdown of the well upstream or of valves downstream.
  • the presence of the loop widens the possibilities of intervention of the operators who, without recycling can only play on the drive speed of the pump.
  • the recycling loop only has one interposed regulating valve.
  • a buffer tank 11 FIG. 2
  • a diversion means is preferably used with a phase separating power, so as to reduce the volumetric ratio GLR of the recycled effluents. It would not go beyond the scope of the invention, however, to replace this particular bypass means with a non-selective branching. In this case, we take advantage of the greater operating flexibility offered by metering the recycled fraction. As shown in Fig 4 where a point of operation m1 is moved to m2 by recycling then to m3 by an increase in the drive speed of the pump.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP95401796A 1994-09-14 1995-07-28 Mehrphasiges Pumpensystem mit Regelkreis Expired - Lifetime EP0702156B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9411048 1994-09-14
FR9411048A FR2724424B1 (fr) 1994-09-14 1994-09-14 Systeme de pompage polyphasique a boucle de regulation

Publications (2)

Publication Number Publication Date
EP0702156A1 true EP0702156A1 (de) 1996-03-20
EP0702156B1 EP0702156B1 (de) 1999-10-06

Family

ID=9466986

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95401796A Expired - Lifetime EP0702156B1 (de) 1994-09-14 1995-07-28 Mehrphasiges Pumpensystem mit Regelkreis

Country Status (5)

Country Link
EP (1) EP0702156B1 (de)
CA (1) CA2158247C (de)
DK (1) DK0702156T3 (de)
FR (1) FR2724424B1 (de)
NO (1) NO307226B1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999046513A1 (en) * 1998-03-13 1999-09-16 Unitec Institute Of Technology Improved pumping apparatus and methods
WO2001006128A1 (en) * 1999-07-21 2001-01-25 Unitec Institute Of Technology Multi-phase flow pumping means and related methods
AU769473B2 (en) * 1998-03-13 2004-01-29 Unitec Institute Of Technology Improved pumping apparatus and methods
WO2005045189A1 (de) * 2003-10-27 2005-05-19 Joh. Heinr. Bornemann Gmbh Verfahren zur förderung von multiphasengemischen sowie pumpenanlage
WO2011115951A3 (en) * 2010-03-15 2012-03-01 General Electric Company Pump assembly employing centrifugal pumps and method for pumping multiphase fluids
WO2017029318A1 (en) * 2015-08-20 2017-02-23 Fmc Kongsberg Subsea As Liquid extraction unit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO337108B1 (no) * 2012-08-14 2016-01-25 Aker Subsea As Flerfase trykkforsterkningspumpe
NO340112B1 (no) * 2012-08-17 2017-03-13 Fmc Kongsberg Subsea As Fremgangsmåte for avkjøling prosessfluid

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2417057A1 (fr) 1978-02-14 1979-09-07 Inst Francais Du Petrole Methode et dispositif pour transporter par canalisation un fluide compose essentiellement d'une masse gazeuse
GB2215408A (en) * 1988-02-29 1989-09-20 Shell Int Research Method and system for controlling the gas-liquid ratio in a pump
GB2239676A (en) * 1989-11-10 1991-07-10 Bhr Group Ltd Pumping gas/liquid mixtures
FR2665224A1 (fr) 1990-07-27 1992-01-31 Inst Francais Du Petrole Dispositif de pompage ou de compression polyphasique et son utilisation.
CH680463A5 (en) 1989-08-15 1992-08-31 Sulzer Ag Multiphase delivery pump for liq. and gas mixts. - including petroleum has mixing arrangement on suction side and maintains efficiency if phases separate and when gas phase predominates
FR2685737A1 (fr) * 1991-12-27 1993-07-02 Inst Francais Du Petrole Procede et dispositif permettant d'optimiser le transfert par pompage d'effluents polyphasiques.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2417057A1 (fr) 1978-02-14 1979-09-07 Inst Francais Du Petrole Methode et dispositif pour transporter par canalisation un fluide compose essentiellement d'une masse gazeuse
GB2215408A (en) * 1988-02-29 1989-09-20 Shell Int Research Method and system for controlling the gas-liquid ratio in a pump
CH680463A5 (en) 1989-08-15 1992-08-31 Sulzer Ag Multiphase delivery pump for liq. and gas mixts. - including petroleum has mixing arrangement on suction side and maintains efficiency if phases separate and when gas phase predominates
GB2239676A (en) * 1989-11-10 1991-07-10 Bhr Group Ltd Pumping gas/liquid mixtures
FR2665224A1 (fr) 1990-07-27 1992-01-31 Inst Francais Du Petrole Dispositif de pompage ou de compression polyphasique et son utilisation.
FR2685737A1 (fr) * 1991-12-27 1993-07-02 Inst Francais Du Petrole Procede et dispositif permettant d'optimiser le transfert par pompage d'effluents polyphasiques.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
G.E. MCCREERY ET AL., INT. J. MULTIPHASE FLOW, vol. 16, no. 3, pages 429 - 445

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999046513A1 (en) * 1998-03-13 1999-09-16 Unitec Institute Of Technology Improved pumping apparatus and methods
AU769473B2 (en) * 1998-03-13 2004-01-29 Unitec Institute Of Technology Improved pumping apparatus and methods
WO2001006128A1 (en) * 1999-07-21 2001-01-25 Unitec Institute Of Technology Multi-phase flow pumping means and related methods
AU771823B2 (en) * 1999-07-21 2004-04-01 Unitec Institute Of Technology Multi-phase flow pumping means and related methods
US7094016B1 (en) 1999-07-21 2006-08-22 Unitec Institute Of Technology Multi-phase flow pumping means and related methods
WO2005045189A1 (de) * 2003-10-27 2005-05-19 Joh. Heinr. Bornemann Gmbh Verfahren zur förderung von multiphasengemischen sowie pumpenanlage
US7810572B2 (en) 2003-10-27 2010-10-12 Joh. Heinr. Bornemann Gmbh Method for delivering a multi phase mixture and pump installation
WO2011115951A3 (en) * 2010-03-15 2012-03-01 General Electric Company Pump assembly employing centrifugal pumps and method for pumping multiphase fluids
WO2017029318A1 (en) * 2015-08-20 2017-02-23 Fmc Kongsberg Subsea As Liquid extraction unit

Also Published As

Publication number Publication date
FR2724424B1 (fr) 1996-12-13
DK0702156T3 (da) 1999-12-27
EP0702156B1 (de) 1999-10-06
FR2724424A1 (fr) 1996-03-15
CA2158247A1 (fr) 1996-03-15
NO953595D0 (no) 1995-09-12
NO953595L (no) 1996-03-15
CA2158247C (fr) 2006-05-30
NO307226B1 (no) 2000-02-28

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