WO1998002637A1 - Systeme de separateur cyclone en condition de fond - Google Patents

Systeme de separateur cyclone en condition de fond Download PDF

Info

Publication number
WO1998002637A1
WO1998002637A1 PCT/EP1997/003445 EP9703445W WO9802637A1 WO 1998002637 A1 WO1998002637 A1 WO 1998002637A1 EP 9703445 W EP9703445 W EP 9703445W WO 9802637 A1 WO9802637 A1 WO 9802637A1
Authority
WO
WIPO (PCT)
Prior art keywords
hydrocyclone
inlet
overflow
pump
underflow
Prior art date
Application number
PCT/EP1997/003445
Other languages
English (en)
Other versions
WO1998002637A9 (fr
Inventor
Frank Skilbeck
Original Assignee
Baker Hughes Limited
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 Baker Hughes Limited filed Critical Baker Hughes Limited
Priority to DE69707880T priority Critical patent/DE69707880D1/de
Priority to EP97932768A priority patent/EP0910724B1/fr
Priority to AU36200/97A priority patent/AU3620097A/en
Priority to AT97932768T priority patent/ATE208005T1/de
Publication of WO1998002637A1 publication Critical patent/WO1998002637A1/fr
Publication of WO1998002637A9 publication Critical patent/WO1998002637A9/fr
Priority to NO990125A priority patent/NO990125L/no

Links

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
    • E21B43/385—Arrangements for separating materials produced by the well in the well by reinjecting the separated materials into an earth formation in the same well

Definitions

  • An increasingly important technique in producing oil from high cut water wells involves carrying out a pre-separation of the oil and water down hole, pumping the oil component to the surface and injecting the water component back into the well.
  • the oil component which is pumped to the surface is still very wet and there is a need to reduce the water content of the oil component further.
  • It is possible to separate the fluid to produce a much drier oil component for pumping to the surface by utilizing as the pre-separator a hydrocyclone which is appropriately set up by the choice of overflow and underflow orifices sizes and working pressures, but only if a significant proportion of oil is accepted in the water component leaving the underflow of the hydrocyclone. This is not however generally acceptable as the water to be reinjected into the production zone should be as clean as possible.
  • This method enables the amount of water which is pumped to the surface to be reduced whilst maintaining substantially clean water for reinjection into the production zone.
  • Two pumps are needed, one to pump the production fluid into the inlet of the first hydrocyclone, this pumping being necessary to ensure that the
  • the invention also includes an apparatus for use downhole in an oil well, the apparatus comprising first and second hydrocyclone, the underflow of the first hydrocyclone being connected to the inlet of the second hydrocyclone; a first pump for pumping production fluid into the inlet of the first hydrocyclone; and a second pump for pumping liquid form the overflow of the first hydrocyclone, in use to the surface; the overflow of the second hydrocyclone being connected to the inlet of the first pump, or to the inlet of the second party, and the underflow outlet of the second hydrocylone being arranged to discharge, in use, into the well.
  • Fig. 1 is a schematic side elevation of apparatus in accordance with the invention mounted within a well bore;
  • Fig. 2 is a diagram showing the interconnections between the hydrocyclones and pumps.
  • the apparatus A is mounted within a conventional well bore 3, having production perforations 4 and injection perforations 5 separated by a packer 6.
  • production fluid flows through the perforations 4 into the well bore and is them pumped by an injection pump 7 into the inlet of a first hydrocyclone 8.
  • the substantially dry oil component leaves the overflow of the hydrocyclone 8 through a line 9 which leads to the inlet of a production pump 10 which pumps the oil component through a line 11 to the surface.
  • the underflow of the hydrocyclone 8 is connected to the inlet of a second hydrocyclone 12, the overflow of which is either discharged into the well bore to be mixed with the production fluid as indicated by an arrow 13, or is fed through a conduit indicated by the chain dotted line 14 to the inlet of the injection pump 7, and hence is recycled through the first hydrocyclone 8.
  • the substantially clean water leaving the underflow of the hydrocyclone 12 is discharged below the packer 6, as indicated by the arrows 15, and hence through the injection perforations 5 back into the production zone.
  • Both pumps 7 and 11 are driven by a common motor 16 separated from the motors by conventional protectors 17 and 18.
  • the following oil/water ratios may be helpful.
  • the pump 7 will pump 21 parts oil and 84 parts water into the inlet of the first hydrocyclone 8.
  • acceptably dry oil component leaving the overflow of the first hydrocyclone 8 might then contain 20 parts oil and four parts water, the remaining one part oil and 80 parts water leaving the underflow of the hydrocylone 8 and entering the inlet of the second hydrocyclone 12. Allowing for the continued recycling of one part oil and four parts water from the overflow of the second hydrocyclone 12, this leaves 76 parts water to leave the underflow of the second hydrocyclone 12 for reinjection into the well.

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)
  • Cyclones (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Fats And Perfumes (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne un appareil prévu pour être utilisé en condition de fond dans un puits de pétrole. Cet appareil comprend un premier (8) et un deuxième (12) hydrocyclone. Le soutirat du premier hydrocyclone est relié à l'entrée du deuxième hydrocyclone. L'appareil comprend également une première pompe (7) prévue pour pomper le fluide de production et l'envoyer dans l'entrée du premier hydrocyclone, et une deuxième pompe (10) pour pomper le liquide provenant du débord du premier hydrocyclone et l'envoyer en direction de la surface. Le débord du deuxième hydrocyclone est relié à l'entrée de la première pompe, ou à l'entrée de la deuxième pompe, et la sortie du soutirat du deuxième hydrocyclone se déverse dans le puits.
PCT/EP1997/003445 1996-07-12 1997-07-02 Systeme de separateur cyclone en condition de fond WO1998002637A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE69707880T DE69707880D1 (de) 1996-07-12 1997-07-02 Bohrloch-zyklonabscheider
EP97932768A EP0910724B1 (fr) 1996-07-12 1997-07-02 Systeme de separateur cyclone en condition de fond
AU36200/97A AU3620097A (en) 1996-07-12 1997-07-02 Downhole cyclone separation
AT97932768T ATE208005T1 (de) 1996-07-12 1997-07-02 Bohrloch-zyklonabscheider
NO990125A NO990125L (no) 1996-07-12 1999-01-12 Nedihull syklonseparering

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9614675.8A GB9614675D0 (en) 1996-07-12 1996-07-12 Oil well production
GB9614675.8 1996-07-12

Publications (2)

Publication Number Publication Date
WO1998002637A1 true WO1998002637A1 (fr) 1998-01-22
WO1998002637A9 WO1998002637A9 (fr) 1998-04-23

Family

ID=10796804

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/003445 WO1998002637A1 (fr) 1996-07-12 1997-07-02 Systeme de separateur cyclone en condition de fond

Country Status (7)

Country Link
EP (1) EP0910724B1 (fr)
AT (1) ATE208005T1 (fr)
AU (1) AU3620097A (fr)
DE (1) DE69707880D1 (fr)
GB (1) GB9614675D0 (fr)
NO (1) NO990125L (fr)
WO (1) WO1998002637A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002033218A1 (fr) * 2000-10-20 2002-04-25 Kværner Oilfield Products As Procede et systeme de traitement de fluides
US6845821B2 (en) 2000-07-06 2005-01-25 Shell Oil Company Apparatus and method for downhole fluid separation
US7621339B2 (en) 2007-02-14 2009-11-24 Schlumberger Technology Corporation Downhole production and injection pump system
CN103742124A (zh) * 2013-12-28 2014-04-23 中国石油天然气股份有限公司 对井下油水分离同井注采井的采出液再分离方法
US10253610B2 (en) 2014-01-22 2019-04-09 Saudi Arabian Oil Company Downhole oil/water separation system for improved injectivity and reservoir recovery

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986003143A1 (fr) * 1984-11-28 1986-06-05 Noel Carroll Separateur cyclone
US5302294A (en) * 1991-05-02 1994-04-12 Conoco Specialty Products, Inc. Separation system employing degassing separators and hydroglyclones
WO1995028230A1 (fr) * 1994-04-13 1995-10-26 Centre For Frontier Engineering Research Institute Appareil pour separation de fond de puits par separateur cyclone

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986003143A1 (fr) * 1984-11-28 1986-06-05 Noel Carroll Separateur cyclone
US5302294A (en) * 1991-05-02 1994-04-12 Conoco Specialty Products, Inc. Separation system employing degassing separators and hydroglyclones
WO1995028230A1 (fr) * 1994-04-13 1995-10-26 Centre For Frontier Engineering Research Institute Appareil pour separation de fond de puits par separateur cyclone

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"DOWNHOLE SEPARATOR USES HYDROCYCLONE, ZONE DISCHARGE", OFFSHORE (INC. THE OILMAN), vol. 55, no. 6, 1 June 1995 (1995-06-01), pages 16, XP000512449 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6845821B2 (en) 2000-07-06 2005-01-25 Shell Oil Company Apparatus and method for downhole fluid separation
WO2002033218A1 (fr) * 2000-10-20 2002-04-25 Kværner Oilfield Products As Procede et systeme de traitement de fluides
US7621339B2 (en) 2007-02-14 2009-11-24 Schlumberger Technology Corporation Downhole production and injection pump system
CN103742124A (zh) * 2013-12-28 2014-04-23 中国石油天然气股份有限公司 对井下油水分离同井注采井的采出液再分离方法
US10253610B2 (en) 2014-01-22 2019-04-09 Saudi Arabian Oil Company Downhole oil/water separation system for improved injectivity and reservoir recovery

Also Published As

Publication number Publication date
EP0910724B1 (fr) 2001-10-31
GB9614675D0 (en) 1996-09-04
AU3620097A (en) 1998-02-09
NO990125D0 (no) 1999-01-12
DE69707880D1 (de) 2001-12-06
EP0910724A1 (fr) 1999-04-28
NO990125L (no) 1999-03-12
ATE208005T1 (de) 2001-11-15

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