+

WO1998002637A9 - Systeme de separateur cyclone en condition de fond - Google Patents

Systeme de separateur cyclone en condition de fond

Info

Publication number
WO1998002637A9
WO1998002637A9 PCT/EP1997/003445 EP9703445W WO9802637A9 WO 1998002637 A9 WO1998002637 A9 WO 1998002637A9 EP 9703445 W EP9703445 W EP 9703445W WO 9802637 A9 WO9802637 A9 WO 9802637A9
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
WO1998002637A1 (fr
Filing date
Publication date
Priority claimed from GBGB9614675.8A external-priority patent/GB9614675D0/en
Application filed filed Critical
Priority to AU36200/97A priority Critical patent/AU3620097A/en
Priority to EP97932768A priority patent/EP0910724B1/fr
Priority to DE69707880T priority patent/DE69707880D1/de
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

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.

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
AU36200/97A AU3620097A (en) 1996-07-12 1997-07-02 Downhole cyclone separation
EP97932768A EP0910724B1 (fr) 1996-07-12 1997-07-02 Systeme de separateur cyclone en condition de fond
DE69707880T DE69707880D1 (de) 1996-07-12 1997-07-02 Bohrloch-zyklonabscheider
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
GB9614675.8 1996-07-12
GBGB9614675.8A GB9614675D0 (en) 1996-07-12 1996-07-12 Oil well production

Publications (2)

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

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2001283936B2 (en) 2000-07-06 2004-10-14 Shell Internationale Research Maatschappij B.V. Apparatus and method for downhole fluid separation
NO312978B1 (no) * 2000-10-20 2002-07-22 Kvaerner Oilfield Prod As Fremgangsmåter og anlegg for å produsere reservoarfluid
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
CA2935997C (fr) 2014-01-22 2019-12-03 Saudi Arabian Oil Company Systeme de separation petrole/eau de fonds de puits destine a ameliorer l'injectivite et la recuperation du reservoir

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1262531A (fr) * 1984-11-28 1989-10-31 Noel Carroll Dispositif de traitement du petrole
US5302294A (en) * 1991-05-02 1994-04-12 Conoco Specialty Products, Inc. Separation system employing degassing separators and hydroglyclones
US5456837A (en) * 1994-04-13 1995-10-10 Centre For Frontier Engineering Research Institute Multiple cyclone apparatus for downhole cyclone oil/water separation

Similar Documents

Publication Publication Date Title
EP0851968B1 (fr) Procede de separation d'un fluide de production dans un puits de petrole
US5830368A (en) Method for borehole separation of oil and water in an oil well
CA2339478C (fr) Separation de fond de trou et injection d'eau produite dans des puits d'hydrocarbures faisant appel a l'ascension par poussee de gaz partiel
US6173774B1 (en) Inter-tandem pump intake
CA2247838C (fr) Systeme de fond de trou pour la separation petrole/eau et la separation des solides
CA2353750A1 (fr) Systeme et methode pour eliminer les particules solides des fluides de forage pompes
US20070199714A1 (en) Closed loop multiphase underbalanced drilling process
WO1998020233A3 (fr) Systeme de separation et de reinjection de fluides pour puits de petrole
WO1998059153A1 (fr) Ensemble separateur cyclonique
CN103338827B (zh) 用于井下应用的两个不可混合的流体相的分离
EP0151604A1 (fr) Systemes de recuperation de petrole
EP0910724B1 (fr) Systeme de separateur cyclone en condition de fond
WO1998002637A9 (fr) Systeme de separateur cyclone en condition de fond
WO2001023707A1 (fr) Dispositif de separation de fond
EP1445420A3 (fr) Systèmes de séparation d'huile et de pompage
EP0830494B1 (fr) Procede de cyclonage de fond de puits
CA2428056C (fr) Methode de separation centrifuge d'eau et de petrole en fond de trou, et appareil connexe
点击 这是indexloc提供的php浏览器服务，不要输入任何密码和下载