WO2006098637A1 - Pipe separator inlet - Google Patents

Pipe separator inlet Download PDF

Info

Publication number
WO2006098637A1
WO2006098637A1 PCT/NO2006/000097 NO2006000097W WO2006098637A1 WO 2006098637 A1 WO2006098637 A1 WO 2006098637A1 NO 2006000097 W NO2006000097 W NO 2006000097W WO 2006098637 A1 WO2006098637 A1 WO 2006098637A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
separator
gas
inlet
diameter
Prior art date
Application number
PCT/NO2006/000097
Other languages
French (fr)
Inventor
Per Eivind Gramme
Gunnar Hannibal Lie
Original Assignee
Norsk Hydro Asa
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 Norsk Hydro Asa filed Critical Norsk Hydro Asa
Priority to EP06716768A priority Critical patent/EP1861580B1/en
Priority to BRPI0608704A priority patent/BRPI0608704B1/en
Priority to AU2006223694A priority patent/AU2006223694B2/en
Priority to AT06716768T priority patent/ATE542983T1/en
Priority to CN2006800081924A priority patent/CN101160448B/en
Priority to MX2007011226A priority patent/MX2007011226A/en
Priority to CA2600699A priority patent/CA2600699C/en
Priority to US11/886,159 priority patent/US7901492B2/en
Publication of WO2006098637A1 publication Critical patent/WO2006098637A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0042—Degasification of liquids modifying the liquid flow
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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

Definitions

  • the present invention concerns a pipe separator or, more specifically, the inlet to such a separator, comprising an extended tubular body with a diameter that is principally the same as or slightly larger than the diameter of the inlet pipe/outlet pipe of the separator.
  • Pipe separators are very effective for separation of fluids with non-mixable fluid components and also represent a simple, structurally light solution compared with conventional gravitation separators.
  • PCT/NO 03/00265 shows such a separator.
  • Pipe separators are very effective for separation of fluids with non-mixable fluid components and also represent a simple, structurally light solution compared with conventional gravitation separators.
  • plug flow may occur, one reason being design-related conditions, which may reduce the separation in the separator.
  • the present invention represents a solution that will completely eliminate such plug flow.
  • the present invention is characterised as specified in the attached independent claim 1.
  • Dependent claims 2-3 define advantageous features of the present invention.
  • Fig. 1 shows a longitudinal section of part of a separator with an inlet in accordance with the present invention
  • Fig. 2 shows a longitudinal section of part of a separator with an alternative embodiment in accordance with the present invention
  • Fig. 3 shows another example of an alternative embodiment of part of a separator in accordance with the present invention.
  • Fig. 1 shows, as stated above, part of a pipe separator 1 with an inlet in accordance with the present invention arranged in connection with a supply pipe 3 for a multiphase flow, for example oil, water and gas.
  • a multiphase flow for example oil, water and gas.
  • the flow pattern in a multiphase flow upstream of the pipe separator is often gas/fluid plug flow if the gas/fluid composition and the design of the supply pipe are unfavourable.
  • the fluid plugs 4 are shown as darker parts, while the gas takes the form of gas bubbles 5 in a light colour or white.
  • the present invention involves "puncturing" the gas bubbles and removing them so that the gas phase is mainly collected in a gas collector and the fluid phase remains in the main pipe.
  • This is achieved by means of a separate gas manifold 2, arranged in connection with the inlet.
  • the manifold 2 comprises a number of vertical degassing pipes 7, which are connected to the transport pipe immediately ahead of the inlet to the separator and which end in a slightly inclined gas collection pipe 6. The gas is thus diverted up through the vertical degassing pipes and collected in the gas collection pipe 6. Tests have shown that this an effective way of eliminating plug flow while also ensuring that a constant fluid flow is supplied to the pipe separator 1.
  • the gas that is removed can bypass the pipe separator via the gas collection pipe 6 and be added to the oil phase straight after the separator, or it can be transported onwards to a gas tank or similar.
  • the system can be designed so that the gas removal is driven by the normal pressure drop in the system.
  • Fig. 2 shows an alternative solution in which the supply pipe 3 with the gas manifold 2 is raised to a level (in the area 9) above the pipe separator 1.
  • the gas is forced along the gas path, i.e. up into the gas manifold 2.
  • the diameter of the transport pipe at the inlet to the separator, under (at 8) the last of the degassing pipes 7 of the manifold may have an extended diameter, for example equivalent to the diameter of the pipe separator.
  • the purpose of the design of the gas manifold in accordance with the present invention is to:
  • the fluid flow has the correct phase in the separator, i.e. water-continuous flow for the water phase and oil-continuous flow for the oil phase. This reduces mixing in the separator inlet and reduces the formation of multiple dispersions in the mixing process in the inlet.

Landscapes

  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Degasification And Air Bubble Elimination (AREA)
  • Pipeline Systems (AREA)
  • Compounds Of Unknown Constitution (AREA)
  • Separating Particles In Gases By Inertia (AREA)
  • External Artificial Organs (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Eye Examination Apparatus (AREA)

Abstract

A device in connection with a pipe separator, comprising an extended tubular body (1 ) with a diameter that is principally the same as or slightly larger than the diameter of the inlet pipe (3)/outlet pipe of the separator. A separate gas manifold (2) is arranged in connection with the inlet. The manifold (2) comprises a number of vertical degassing pipes (7), which are connected to the inlet pipe (3) immediately ahead of the inlet to the separator and which end in an overlying, preferably slightly inclined gas collection pipe (6). The gas is designed to be diverted up through the vertical degassing pipes and collected in the gas collection pipe (6) for return to the outlet pipe after the separator or transport onwards to a gas tank or gas processing plant or similar.

Description

Pipe separator inlet
The present invention concerns a pipe separator or, more specifically, the inlet to such a separator, comprising an extended tubular body with a diameter that is principally the same as or slightly larger than the diameter of the inlet pipe/outlet pipe of the separator.
Applications for patents for pipe separators of the above type were first submitted by the applicant in the present case in 1996. One of these patent applications is the applicant's own international patent application PCT/NO 03/00265, which shows such a separator. Pipe separators are very effective for separation of fluids with non-mixable fluid components and also represent a simple, structurally light solution compared with conventional gravitation separators. In some situations in connection with the separation of fluids, for example an oil, gas and water flow with a high gas content, plug flow may occur, one reason being design-related conditions, which may reduce the separation in the separator. The present invention represents a solution that will completely eliminate such plug flow.
The present invention is characterised as specified in the attached independent claim 1. Dependent claims 2-3 define advantageous features of the present invention.
The present invention will be described in further detail in the following using examples and with reference to the attached drawings, where:
Fig. 1 shows a longitudinal section of part of a separator with an inlet in accordance with the present invention,
Fig. 2 shows a longitudinal section of part of a separator with an alternative embodiment in accordance with the present invention,
Fig. 3 shows another example of an alternative embodiment of part of a separator in accordance with the present invention.
Fig. 1 shows, as stated above, part of a pipe separator 1 with an inlet in accordance with the present invention arranged in connection with a supply pipe 3 for a multiphase flow, for example oil, water and gas. The flow pattern in a multiphase flow upstream of the pipe separator is often gas/fluid plug flow if the gas/fluid composition and the design of the supply pipe are unfavourable. In the figure, the fluid plugs 4 are shown as darker parts, while the gas takes the form of gas bubbles 5 in a light colour or white.
The present invention involves "puncturing" the gas bubbles and removing them so that the gas phase is mainly collected in a gas collector and the fluid phase remains in the main pipe. This is achieved by means of a separate gas manifold 2, arranged in connection with the inlet. The manifold 2 comprises a number of vertical degassing pipes 7, which are connected to the transport pipe immediately ahead of the inlet to the separator and which end in a slightly inclined gas collection pipe 6. The gas is thus diverted up through the vertical degassing pipes and collected in the gas collection pipe 6. Tests have shown that this an effective way of eliminating plug flow while also ensuring that a constant fluid flow is supplied to the pipe separator 1.
The gas that is removed can bypass the pipe separator via the gas collection pipe 6 and be added to the oil phase straight after the separator, or it can be transported onwards to a gas tank or similar. The system can be designed so that the gas removal is driven by the normal pressure drop in the system.
Fig. 2 shows an alternative solution in which the supply pipe 3 with the gas manifold 2 is raised to a level (in the area 9) above the pipe separator 1. By raising the gas manifold above the pipe separator, as has been done here, the gas is forced along the gas path, i.e. up into the gas manifold 2.
Moreover, as shown in Fig. 3, the diameter of the transport pipe at the inlet to the separator, under (at 8) the last of the degassing pipes 7 of the manifold, may have an extended diameter, for example equivalent to the diameter of the pipe separator. By increasing the pipe diameter in the last part of the gas manifold so that the fluid speed in the pipe is reduced, gas that is not separated can flow back to the last degassing pipe 7.
The purpose of the design of the gas manifold in accordance with the present invention is to:
1. Separate out the gas phase from a gas/oil/water well flow in a simple manner that does not subject the multiphase flow to high shearing forces. High shearing forces are normally negative for the separation.
2. Ensure the fluid flow has the correct phase in the separator, i.e. water-continuous flow for the water phase and oil-continuous flow for the oil phase. This reduces mixing in the separator inlet and reduces the formation of multiple dispersions in the mixing process in the inlet.

Claims

Claims
1. A device in connection with a pipe separator, comprising an extended tubular body (1) with a diameter that is principally the same as or slightly larger than the diameter of the inlet pipe (3)/outlet pipe of the separator, characterised in that a separate gas manifold (2) is arranged in connection with the inlet; the manifold (2) comprises a number of vertical degassing pipes (7), which are connected to the inlet pipe (3) immediately ahead of the inlet to the separator and end in an overlying, preferably slightly inclined gas collection pipe (6); the gas is designed to be diverted up through the vertical degassing pipes and collected in the gas collection pipe (6) for return to the outlet pipe after the separator or transport onwards to a gas tank or gas processing plant.
2. A device in accordance with claim 1 , characterised in that the supply pipe (3) with the gas manifold (2) is raised to a level (in the area 9) above the pipe separator (1).
3. A device in accordance with claim 1 , characterised in that the diameter of the transport pipe at the inlet to the separator, under the last of the degassing pipes (7) of the manifold (in the area 8), has an extended diameter, for example equivalent to the diameter of the pipe separator (2).
PCT/NO2006/000097 2005-03-16 2006-03-15 Pipe separator inlet WO2006098637A1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP06716768A EP1861580B1 (en) 2005-03-16 2006-03-15 Pipe separator inlet
BRPI0608704A BRPI0608704B1 (en) 2005-03-16 2006-03-15 device in connection with a pipe separator
AU2006223694A AU2006223694B2 (en) 2005-03-16 2006-03-15 Pipe separator inlet
AT06716768T ATE542983T1 (en) 2005-03-16 2006-03-15 PIPE SEPARATOR INLET
CN2006800081924A CN101160448B (en) 2005-03-16 2006-03-15 Pipe separator inlet
MX2007011226A MX2007011226A (en) 2005-03-16 2006-03-15 Pipe separator inlet.
CA2600699A CA2600699C (en) 2005-03-16 2006-03-15 Pipe separator inlet
US11/886,159 US7901492B2 (en) 2005-03-16 2006-03-15 Pipe separator inlet

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20051387A NO329480B1 (en) 2005-03-16 2005-03-16 Device by a rudder separator
NO20051387 2005-03-16

Publications (1)

Publication Number Publication Date
WO2006098637A1 true WO2006098637A1 (en) 2006-09-21

Family

ID=35267039

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2006/000097 WO2006098637A1 (en) 2005-03-16 2006-03-15 Pipe separator inlet

Country Status (11)

Country Link
US (1) US7901492B2 (en)
EP (1) EP1861580B1 (en)
CN (1) CN101160448B (en)
AT (1) ATE542983T1 (en)
AU (1) AU2006223694B2 (en)
BR (1) BRPI0608704B1 (en)
CA (1) CA2600699C (en)
MX (1) MX2007011226A (en)
NO (1) NO329480B1 (en)
RU (1) RU2380532C2 (en)
WO (1) WO2006098637A1 (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010034325A1 (en) * 2008-09-24 2010-04-01 Statoilhydro Asa Gas-liquid separator
RU2448245C1 (en) * 2008-02-28 2012-04-20 Статойл Аса Separation and collection of multi-phase flow fluids
RU2462591C2 (en) * 2007-03-20 2012-09-27 Фмс Конгсберг Сабси Ас Underwater plant and method for separation of liquid fraction and gas fraction
US8453747B2 (en) 2007-05-16 2013-06-04 Statoilhydro Asa Method for liquid control in multiphase fluid pipelines
WO2014023743A2 (en) * 2012-08-06 2014-02-13 Statoil Petroleum As Subsea processing
NO20150473A1 (en) * 2014-06-04 2015-12-07 Fluidsep As V/Nils A Braaten New method and device for separating liquids and gases using inclined and rounded holes or ducts in pipe wall
WO2015118072A3 (en) * 2014-02-05 2015-12-10 Statoil Petroleum As Subsea processing
WO2016209086A1 (en) * 2015-06-25 2016-12-29 Kanfa As Separator system and method for breaking down a dispersion band
NO341580B1 (en) * 2016-09-30 2017-12-11 Seabed Separation As Method and system for separating oil well substances
WO2021075975A1 (en) * 2019-10-15 2021-04-22 Seabed Separation As Method and system for separating oil well substances with means for capturing and removing liquid from a gas outlet pipeline
US11577180B2 (en) 2017-04-18 2023-02-14 Subsea 7 Norway As Subsea processing of crude oil
US11598193B2 (en) 2017-04-18 2023-03-07 Subsea 7 Norway As Subsea processing of crude oil

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FR2921844B1 (en) * 2007-10-09 2011-11-25 Saipem Sa HORIZONTAL LIQUID / GAS SEPARATION DEVICE AND SEPARATION METHOD, IN PARTICULAR LIQUID AND GAS PHASES OF A GROSS OIL
US9371724B2 (en) * 2012-07-27 2016-06-21 Exxonmobil Upstream Research Company Multiphase separation system
SG11201408693YA (en) * 2012-10-08 2015-02-27 Exxonmobil Upstream Res Co Multiphase separation system
BR112015024649B1 (en) * 2013-03-28 2021-11-30 Fluor Technologies Corporation SETTINGS AND METHODS FOR GAS AND LIQUID SEPARATORS
US20160045842A1 (en) * 2014-08-13 2016-02-18 Agar Corporation Ltd. System for inline phase separation of a fluid mixture
CN106474828A (en) 2015-08-27 2017-03-08 通用电气公司 Apparatus and method for Gravity Separation and the oil and natural gas production system comprising which and method
CN107882545A (en) * 2016-09-29 2018-04-06 中国石油化工股份有限公司 High-water-cut oil-producing well produces liquid division box and method on the spot
CN106334346A (en) * 2016-10-31 2017-01-18 中冶赛迪工程技术股份有限公司 Composite pipe for conveying gas-liquid two-phase flow
CN107143321A (en) * 2017-07-05 2017-09-08 中国石油大学(华东) A kind of finger-like slug flow dissipation separator
CN111467839A (en) * 2020-04-21 2020-07-31 西南石油大学 Oil-gas-water net pipe type multistage separation device and method
CN113236194B (en) * 2021-05-24 2023-02-07 中国海洋石油集团有限公司 Oil-gas-water three-phase separation and separation transmission device and method
FR3137925A1 (en) * 2022-07-13 2024-01-19 Technip Energies France Installation and process for producing hydrogen by electrolysis of water with gas-liquid separations in the flow conveyance lines

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EP1044711A1 (en) * 1999-04-12 2000-10-18 Shell Internationale Researchmaatschappij B.V. Device for separating a mixture of fluids
WO2004016907A1 (en) * 2002-08-16 2004-02-26 Norsk Hydro Asa A pipe separator for the separation of fluids, particularly oil, gas and water

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US1516132A (en) * 1923-02-26 1924-11-18 William R Allen Oil and water stratifying device
SU1248630A1 (en) * 1983-11-28 1986-08-07 Всесоюзный Научно-Исследовательский Институт По Сбору,Подготовке И Транспорту Нефти И Нефтепродуктов Separator
EP1044711A1 (en) * 1999-04-12 2000-10-18 Shell Internationale Researchmaatschappij B.V. Device for separating a mixture of fluids
WO2004016907A1 (en) * 2002-08-16 2004-02-26 Norsk Hydro Asa A pipe separator for the separation of fluids, particularly oil, gas and water

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2462591C2 (en) * 2007-03-20 2012-09-27 Фмс Конгсберг Сабси Ас Underwater plant and method for separation of liquid fraction and gas fraction
US8282711B2 (en) 2007-03-20 2012-10-09 Fmc Kongsberg Subsea As Subsea installation and method for separation of liquid and gas
US8453747B2 (en) 2007-05-16 2013-06-04 Statoilhydro Asa Method for liquid control in multiphase fluid pipelines
RU2448245C1 (en) * 2008-02-28 2012-04-20 Статойл Аса Separation and collection of multi-phase flow fluids
NO20110615A1 (en) * 2008-09-24 2011-06-23 Equinor Energy As gas liquid separator
US8894755B2 (en) 2008-09-24 2014-11-25 Statoil Petroleum As Gas-liquid separator
NO346524B1 (en) * 2008-09-24 2022-09-19 Equinor Energy As Gas liquid separator
WO2010034325A1 (en) * 2008-09-24 2010-04-01 Statoilhydro Asa Gas-liquid separator
US9790778B2 (en) 2012-08-06 2017-10-17 Statoil Petroleum As Subsea processing
WO2014023743A2 (en) * 2012-08-06 2014-02-13 Statoil Petroleum As Subsea processing
WO2014023743A3 (en) * 2012-08-06 2014-10-30 Statoil Petroleum As Subsea processing
WO2015118072A3 (en) * 2014-02-05 2015-12-10 Statoil Petroleum As Subsea processing
NO343248B1 (en) * 2014-06-04 2018-12-17 Fluidsep As V/Nils A Braaten Device for separating liquids and gases
NO20150473A1 (en) * 2014-06-04 2015-12-07 Fluidsep As V/Nils A Braaten New method and device for separating liquids and gases using inclined and rounded holes or ducts in pipe wall
WO2016209086A1 (en) * 2015-06-25 2016-12-29 Kanfa As Separator system and method for breaking down a dispersion band
NO341580B1 (en) * 2016-09-30 2017-12-11 Seabed Separation As Method and system for separating oil well substances
NO20161578A1 (en) * 2016-09-30 2017-12-11 Seabed Separation As Method and system for separating oil well substances
WO2018063007A1 (en) 2016-09-30 2018-04-05 Seabed Separation As Method and system for separating oil well substances
US11091996B2 (en) 2016-09-30 2021-08-17 Seabed Separation As Method and system for separating oil well substances
US11577180B2 (en) 2017-04-18 2023-02-14 Subsea 7 Norway As Subsea processing of crude oil
US11598193B2 (en) 2017-04-18 2023-03-07 Subsea 7 Norway As Subsea processing of crude oil
WO2021075975A1 (en) * 2019-10-15 2021-04-22 Seabed Separation As Method and system for separating oil well substances with means for capturing and removing liquid from a gas outlet pipeline

Also Published As

Publication number Publication date
CN101160448A (en) 2008-04-09
AU2006223694B2 (en) 2011-07-14
US7901492B2 (en) 2011-03-08
EP1861580A4 (en) 2010-10-20
EP1861580A1 (en) 2007-12-05
EP1861580B1 (en) 2012-01-25
CA2600699A1 (en) 2006-09-21
BRPI0608704B1 (en) 2017-03-14
CA2600699C (en) 2011-07-19
NO20051387D0 (en) 2005-03-16
AU2006223694A1 (en) 2006-09-21
RU2380532C2 (en) 2010-01-27
RU2007138304A (en) 2009-04-27
MX2007011226A (en) 2007-11-12
NO329480B1 (en) 2010-10-25
CN101160448B (en) 2012-11-28
BRPI0608704A2 (en) 2010-12-07
US20080134651A1 (en) 2008-06-12
NO20051387L (en) 2006-09-18
ATE542983T1 (en) 2012-02-15

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