WO2011073203A1 - Separating multiphase effluents of an underwater well - Google Patents

Separating multiphase effluents of an underwater well Download PDF

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Publication number
WO2011073203A1
WO2011073203A1 PCT/EP2010/069656 EP2010069656W WO2011073203A1 WO 2011073203 A1 WO2011073203 A1 WO 2011073203A1 EP 2010069656 W EP2010069656 W EP 2010069656W WO 2011073203 A1 WO2011073203 A1 WO 2011073203A1
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WO
WIPO (PCT)
Prior art keywords
liquid
collecting chamber
riser
liquid collecting
components
Prior art date
Application number
PCT/EP2010/069656
Other languages
French (fr)
Inventor
Davoud Tayebi
Original Assignee
Shell Internationale Research Maatschappij B.V.
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 Shell Internationale Research Maatschappij B.V. filed Critical Shell Internationale Research Maatschappij B.V.
Publication of WO2011073203A1 publication Critical patent/WO2011073203A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0031—Degasification of liquids by filtration
    • 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
    • E21B43/36—Underwater separating arrangements
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/01—Risers

Definitions

  • the invention relates to a method and system for separating gaseous and liquid components from multiphase well effluents of an underwater well.
  • 6,537,458 which discloses a separation vessel for separating gaseous from liquid components of a multiphase well effluent mixture produced by an oil and/or gas production well.
  • a disadvantage of the method and system known from this prior art reference is that it requires a bulky separation vessel, which is expensive and requires regular inspection and/or replacement since it is configured as a large diameter high pressure vessel.
  • US patent application US2005/0081718 discloses a downhole gas/liquid separator with a co-axial inner and outer conduit assembly which is arranged in a vertical tubing string in a multiphase hydrocarbon fluid
  • orientation of the co-axial inner and outer conduits are that the separation performance is low, since no use is made of differences in density between gaseous and liquid components of the well effluents and that it does not inhibit a slug flow regime if the liquid and gaseous components flow in a slug flow regime into the vertical separator .
  • a method for separating gaseous and liquid components from multiphase well effluents of an underwater well comprising:
  • a gas-liquid separator comprising an annular liquid collecting chamber which at least partially surrounds a lower portion of the riser or underwater flowline having an at least partially permeable wall, which annular liquid collecting chamber is configured to allow liquid components that pass through the permeable wall to drain to a lower section of the chamber;
  • the lower portion of the riser or underwater flowline comprises an impermeable bottom section and a permeable upper section, which sections extend through the liquid collecting chamber, such that the impermeable bottom section extends through the lower section of the liquid collecting chamber to a level above the predetermined upper level;
  • the permeable upper section of the lower portion of the riser or underwater flowline has an inclined orientation relative to a horizontal plane.
  • the lower portion of the riser comprises an impermeable bottom section and a permeable upper section, which sections extend through the annular liquid collecting chamber, such that the impermeable bottom section extends through the lower section of the liquid collecting chamber to a level above the predetermined upper level .
  • the system comprising:
  • a riser or underwater flowline with an upper portion for lifting substantially gaseous components to a gas processing or receiving facility at the water surface;
  • a gas-liquid separator comprising an annular liquid collecting chamber which at least partially surrounds a lower portion of the riser or underwater flowline having an at least partially permeable wall, which liquid collecting chamber is configured to allow liquid
  • liquid transportation conduit to the lower section of the liquid collecting chamber, which conduit is provided with a liquid pump assembly that is configured to pump substantially liquid components from the liquid
  • the lower portion of the riser comprises an impermeable bottom section and a permeable upper section, which sections extend through the annular liquid collecting chamber, such that the impermeable bottom section extends through the lower section of the liquid collecting chamber to a level above the predetermined upper level;
  • the permeable upper section of the lower portion of the riser or underwater flowline has an inclined orientation relative to a horizontal plane.
  • permeable upper section of the lower portion of the riser or other underwater flowline may have an inclined
  • orientation relative to a horizontal plane with an angle of inclination of at least 5° and at most 85° relative to a horizontal plane.
  • Fig.l shows a lower portion of a riser which is provided with a gas-liquid separator according to the invention .
  • Fig.l shows a multiphase well effluent flowline 1 at the bottom 2 of a body of water 3, which may be a sea, ocean, f ord, lake or river with a waterdepth of up to several kilometers.
  • the flowline 1 is connected to a riser 4 having a lower portion 4A which is provided with a gas-liquid separator 5 and a substantially vertical upper portion 4B for transporting substantially gaseous components 15 to gas processing or receiving facilities arranged at a receiving unit such as platform 6, which (floats) at the water surface 7.
  • the receiving unit may be a floating platform, a Tension Leg Platform (TLP) , a Floating
  • FPSO Production, Storage and Offloading
  • the lower portion 4A of the riser 4 comprises an impermeable curved lower section 4A1, which is connected to the downstream end of the multiphase well effluent flowline 1, and an inclined permeable upper section 4A2, which riser sections 4A1 and 4A2 are surrounded by a liquid collecting chamber 8, such that an annular liquid drainage channel 9 is provided between the inner wall of the liquid collecting chamber 8 and the outer walls of the riser sections 4A1 and 4A2.
  • a liquid transportation conduit 10 is connected to a lower section of the liquid collecting chamber 8, which conduit 10 is provided with a liquid pump assembly 11 that pumps substantially liquid components 12 from a lower section 9A of the annular liquid drainage channel 9 of the liquid collecting chamber 8 to a liquid processing or receiving facility at the receiving unit 6 at the water surface 7.
  • the liquid collecting chamber 8 may be provided with upper and lower liquid level gauges 13 and 14, which monitor the liquid level in the annular liquid drainage channel 9 and which may be connected to liquid pump assembly 11 such that the assembly 11 is switched on when the liquid level in the annular liquid drainage channel 9 has reached the upper liquid level gauge 13 and that the assembly 11 is switched off when the liquid level in the annular liquid drainage channel 9 drops below the lower liquid level gauge 14.
  • liquid recycle conduit 16 interconnects a section of the liquid transportation conduit 10
  • valve 17 may be arranged in the liquid recycle conduit 16 to fine tune the control of the liquid level in the annular liquid collecting chamber 9A such that the liquid level is maintained between the upper and lower level gauges 13 and 14.
  • the inclined orientation of the co-axial tubular gas-liquid separator according to the invention has the advantage that the inclination enhances the separation efficiency and reduces slug flow in the riser or other underwater flowline.
  • Such other underwater flowline may be a catenary flowline or flowline extending from an underwater well or
  • multiphase oil and/or natural processing facility to an onshore oil and/or natural gas production and/or further processing facility.
  • separator according the invention will be installed in this inclined section such that a compact and efficient oil/gas separator is provided which effectively inhibits slug flow in the separator and associated oil and/or gas production flowlines and other facilities that are connected to the up and downstream ends of the separator.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physical Water Treatments (AREA)

Abstract

Gaseous and liquid effluents of an underwater well are separated efficiently and such that a slug flow regime is inhibited by: - providing a riser (4) or other underwater flowline with an upper portion (4B) for lifting substantially gaseous components (15) to a gas processing or receiving facility(6) above the water surface (7); - providing a gas-liquid separator (5) comprising an annular liquid collecting chamber (8) which co-axially surrounds a tubular lower portion (4A) of the riser having an at least partially permeable wall (4Al), which annular liquid collecting chamber (8) has an inclined orientation and is configured to allow liquid components that pass through the permeable wall to drain to a lower section of the chamber (9); - connecting a liquid transportation conduit (10) to the lower section (9A) of the liquid collecting chamber (8), which conduit (10) is provided with a liquid pump assembly (11) that pumps substantially liquid components (12) from the liquid collecting chamber to a liquid processing facility above the water surface (7).

Description

SEPARATING MULTIPHASE EFFLUENTS OF AN UNDERWATER WELL
BACKGROUND OF THE INVENTION
The invention relates to a method and system for separating gaseous and liquid components from multiphase well effluents of an underwater well.
Such a method and system are known from US patent
6,537,458, which discloses a separation vessel for separating gaseous from liquid components of a multiphase well effluent mixture produced by an oil and/or gas production well.
A disadvantage of the method and system known from this prior art reference is that it requires a bulky separation vessel, which is expensive and requires regular inspection and/or replacement since it is configured as a large diameter high pressure vessel.
US patent application US2005/0081718 discloses a downhole gas/liquid separator with a co-axial inner and outer conduit assembly which is arranged in a vertical tubing string in a multiphase hydrocarbon fluid
production well.
Disadvantages of the substantially vertical
orientation of the co-axial inner and outer conduits are that the separation performance is low, since no use is made of differences in density between gaseous and liquid components of the well effluents and that it does not inhibit a slug flow regime if the liquid and gaseous components flow in a slug flow regime into the vertical separator .
There is a need to provide a method and system for separating gaseous and liquid components discharged by an underwater well which does not require the use of a bulky separation vessel and which is configured such that requires less frequent inspection and/or replacement since it may be configured as a small diameter pipeline instead of as a large diameter high pressure vessel.
There is also a need to provide a method and system for separating gaseous and liquid components discharged by an underwater well which is configured as a small diameter pipeline and which separates liquid and liquid components with a high efficiency and such that a slug flow regime in the separator and associated flowlines and hydrocarbon fluid processing facilities is inhibited.
SUMMARY OF THE INVENTION
In accordance with the invention there is provided a method for separating gaseous and liquid components from multiphase well effluents of an underwater well, the method comprising:
- providing a riser or underwater flowline with an upper portion for lifting substantially gaseous components to a gas processing or receiving facility above the water surface ;
- providing a gas-liquid separator comprising an annular liquid collecting chamber which at least partially surrounds a lower portion of the riser or underwater flowline having an at least partially permeable wall, which annular liquid collecting chamber is configured to allow liquid components that pass through the permeable wall to drain to a lower section of the chamber;
- connecting a liquid transportation conduit to the lower section of the liquid collecting chamber, which conduit is provided with a liquid pump assembly that pumps substantially liquid components from the liquid
collecting chamber to a liquid processing or receiving facility at the water surface;
- and wherein: - the lower portion of the riser or underwater flowline comprises an impermeable bottom section and a permeable upper section, which sections extend through the liquid collecting chamber, such that the impermeable bottom section extends through the lower section of the liquid collecting chamber to a level above the predetermined upper level; and
- the permeable upper section of the lower portion of the riser or underwater flowline has an inclined orientation relative to a horizontal plane.
Optionally, the lower portion of the riser comprises an impermeable bottom section and a permeable upper section, which sections extend through the annular liquid collecting chamber, such that the impermeable bottom section extends through the lower section of the liquid collecting chamber to a level above the predetermined upper level .
In accordance with the invention there is further provided a system for separating gaseous and liquid components from multiphase well effluents of an
underwater well, the system comprising:
- a riser or underwater flowline with an upper portion for lifting substantially gaseous components to a gas processing or receiving facility at the water surface; - a gas-liquid separator comprising an annular liquid collecting chamber which at least partially surrounds a lower portion of the riser or underwater flowline having an at least partially permeable wall, which liquid collecting chamber is configured to allow liquid
components that pass through the permeable wall to drain to a lower section of the chamber; and
- a liquid transportation conduit to the lower section of the liquid collecting chamber, which conduit is provided with a liquid pump assembly that is configured to pump substantially liquid components from the liquid
collecting chamber to a liquid processing facility above the water surface;
- and wherein:
- the lower portion of the riser comprises an impermeable bottom section and a permeable upper section, which sections extend through the annular liquid collecting chamber, such that the impermeable bottom section extends through the lower section of the liquid collecting chamber to a level above the predetermined upper level; and
- the permeable upper section of the lower portion of the riser or underwater flowline has an inclined orientation relative to a horizontal plane.
The annular liquid collecting chamber and the
permeable upper section of the lower portion of the riser or other underwater flowline may have an inclined
orientation relative to a horizontal plane, with an angle of inclination of at least 5° and at most 85° relative to a horizontal plane.
These and other features, embodiments and
advantages of the method and system according to the invention are described in the accompanying claims, abstract and the following detailed description of non- limiting embodiments depicted in the accompanying
drawing, in which description reference numerals are used which refer to corresponding reference numerals that are depicted in the drawing.
BRIEF DESCRIPTION OF THE DRAWING
Fig.l shows a lower portion of a riser which is provided with a gas-liquid separator according to the invention . DETAILED DESCRIPTION OF THE DEPICTED EMBODIMENTS
Fig.l shows a multiphase well effluent flowline 1 at the bottom 2 of a body of water 3, which may be a sea, ocean, f ord, lake or river with a waterdepth of up to several kilometers.
The flowline 1 is connected to a riser 4 having a lower portion 4A which is provided with a gas-liquid separator 5 and a substantially vertical upper portion 4B for transporting substantially gaseous components 15 to gas processing or receiving facilities arranged at a receiving unit such as platform 6, which (floats) at the water surface 7. The receiving unit may be a floating platform, a Tension Leg Platform (TLP) , a Floating
Production, Storage and Offloading (FPSO) unit or bottom supported offshore platform.
The lower portion 4A of the riser 4 comprises an impermeable curved lower section 4A1, which is connected to the downstream end of the multiphase well effluent flowline 1, and an inclined permeable upper section 4A2, which riser sections 4A1 and 4A2 are surrounded by a liquid collecting chamber 8, such that an annular liquid drainage channel 9 is provided between the inner wall of the liquid collecting chamber 8 and the outer walls of the riser sections 4A1 and 4A2.
A liquid transportation conduit 10 is connected to a lower section of the liquid collecting chamber 8, which conduit 10 is provided with a liquid pump assembly 11 that pumps substantially liquid components 12 from a lower section 9A of the annular liquid drainage channel 9 of the liquid collecting chamber 8 to a liquid processing or receiving facility at the receiving unit 6 at the water surface 7. The liquid collecting chamber 8 may be provided with upper and lower liquid level gauges 13 and 14, which monitor the liquid level in the annular liquid drainage channel 9 and which may be connected to liquid pump assembly 11 such that the assembly 11 is switched on when the liquid level in the annular liquid drainage channel 9 has reached the upper liquid level gauge 13 and that the assembly 11 is switched off when the liquid level in the annular liquid drainage channel 9 drops below the lower liquid level gauge 14.
Optionally a liquid recycle conduit 16 interconnects a section of the liquid transportation conduit 10
downstream of the pump assembly 11 with a section of the conduit 10 upstream of the pump assembly 11, and a valve 17 may be arranged in the liquid recycle conduit 16 to fine tune the control of the liquid level in the annular liquid collecting chamber 9A such that the liquid level is maintained between the upper and lower level gauges 13 and 14.
The inclined orientation of the co-axial tubular gas-liquid separator according to the invention has the advantage that the inclination enhances the separation efficiency and reduces slug flow in the riser or other underwater flowline.
Such other underwater flowline may be a catenary flowline or flowline extending from an underwater well or
multiphase oil and/or natural processing facility to an onshore oil and/or natural gas production and/or further processing facility.
If the underwater flowline has a section with an inclined orientation then the co-axial tubular gas-liquid
separator according the invention will be installed in this inclined section such that a compact and efficient oil/gas separator is provided which effectively inhibits slug flow in the separator and associated oil and/or gas production flowlines and other facilities that are connected to the up and downstream ends of the separator.

Claims

C L A I M S
1. A method for separating gaseous and liquid components from multiphase well effluents of an underwater well, the method comprising:
- providing a riser or underwater flowline with an upper portion for lifting substantially gaseous components to a gas processing or receiving facility above the water surface ;
- providing a gas-liquid separator comprising an annular liquid collecting chamber which at least partially surrounds a lower portion of the riser or underwater flowline having an at least partially permeable wall, which liquid collecting chamber is configured to allow liquid components that pass through the permeable wall to drain to a lower section of the chamber;
- connecting a liquid transportation conduit to the lower section of the annular liquid collecting chamber, which conduit is provided with a liquid pump assembly that pumps substantially liquid components from the liquid collecting chamber to a liquid processing or receiving facility at the water surface;
- and wherein:
- the lower portion of the riser or underwater flowline comprises an impermeable bottom section and a permeable upper section, which sections extend through the annular liquid collecting chamber, such that the impermeable bottom section extends through the lower section of the liquid collecting chamber to a level above the
predetermined upper level; and.
- the permeable upper section of the lower portion of the riser or underwater flowline has an inclined orientation relative to a horizontal plane.
2. The method of claim 1, wherein the liquid collecting chamber comprises a liquid level gauge and the rate at which the liquid pump assembly pumps liquid components into the liquid riser is controlled such that the liquid level in the liquid collecting chamber is maintained between predetermined upper and lower levels measured by the liquid level gauge.
3. The method of claim 2, wherein the liquid pump assembly comprises a liquid recycle line in which a valve is arranged which is opened if the liquid level in the liquid collecting chamber drops below the predetermined lower level such that the liquid recycle line re¬ circulates liquid into the liquid collecting chamber.
4. The method of claim 1, wherein the inclined
orientation is such that the permeable upper section of the lower portion of the riser or underwater flowline has an angle of inclination of at least 45 degrees relative to the horizontal plane.
5. A system for separating gaseous and liquid components from multiphase well effluents of an underwater well, the system comprising:
- a riser or underwater flowline with an upper portion for lifting substantially gaseous components to a gas processing or receiving facility at the water surface; - a gas-liquid separator comprising a liquid collecting chamber which at least partially surrounds a lower portion of the riser or underwater flowline having an at least partially permeable wall, which liquid collecting chamber is configured to allow liquid components that pass through the permeable wall to drain to a lower section of the chamber; and
- a liquid transportation conduit to the lower section of the liquid collecting chamber, which conduit is provided with a liquid pump assembly that is configured to pump substantially liquid components from the liquid
collecting chamber to a liquid processing facility above the water surface;
- and wherein:
- the lower portion of the riser comprises an impermeable bottom section and a permeable upper section, which sections extend through the liquid collecting chamber, such that the impermeable bottom section extends through the lower section of the liquid collecting chamber to a level above the predetermined upper level; and
- the permeable upper section of the lower portion of the riser or underwater flowline has an inclined orientation relative to a horizontal plane.
6. The system of claim 5, wherein the inclined
orientation is such that the annular liquid separation chamber and permeable upper section of the lower portion of the riser have an angle of inclination of at least 5° and at most 85° relative to the horizontal plane.
7. The system of claim 6, wherein the angle of
inclination is between 30° and 60° relative to the horizontal plane.
PCT/EP2010/069656 2009-12-14 2010-12-14 Separating multiphase effluents of an underwater well WO2011073203A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP09179141 2009-12-14
EP09179141.8 2009-12-14

Publications (1)

Publication Number Publication Date
WO2011073203A1 true WO2011073203A1 (en) 2011-06-23

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014029854A1 (en) * 2012-08-22 2014-02-27 Mærsk Olie Og Gas A/S A system and a method for separating liquid and gas flowing through a multiphase pipeline
WO2015121058A1 (en) * 2014-02-12 2015-08-20 Mærsk Olie Og Gas A/S Separating system and method for separating liquid and gas flowing through a multiphase pipe
WO2017025690A1 (en) * 2015-08-10 2017-02-16 Technip France Underwater facility for gas/liquid separation
WO2017025689A1 (en) * 2015-08-10 2017-02-16 Technip France Underwater method and facility for gas/liquid separation
CN106938152A (en) * 2017-03-29 2017-07-11 青岛理工大学 Tilt the tubular type separator of predrainage degassing under water
US20230101329A1 (en) * 2020-01-21 2023-03-30 Equinor Energy As Riser surge protection system

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US5113937A (en) * 1989-12-28 1992-05-19 Institut Francais De Petrole Device for separating a mixture of free gas and liquid at the intake of a pump at the bottom of a drilled well
US5507858A (en) * 1994-09-26 1996-04-16 Ohio University Liquid/gas separator and slug flow eliminator and process for use
GB2326895A (en) * 1997-07-03 1999-01-06 Schlumberger Ltd Separation of oil-well fluid mixtures by gravity
US6253855B1 (en) * 1999-01-21 2001-07-03 Mentor Subsea Technology Services, Inc. Intelligent production riser
US6277286B1 (en) * 1997-03-19 2001-08-21 Norsk Hydro Asa Method and device for the separation of a fluid in a well
US20010017207A1 (en) * 2000-02-23 2001-08-30 Abb Research Ltd. System and a method of extracting oil
US20020153326A1 (en) * 2001-04-19 2002-10-24 Schlumberger Technology Corporation Apparatus and method for separating a fluid from a mixture of fluids
US6537458B1 (en) 1999-03-05 2003-03-25 Shell Oil Company Three-phase separator
US20050081718A1 (en) 2003-10-17 2005-04-21 Carruth Don V. Downhole gas/liquid separator and method

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Publication number Priority date Publication date Assignee Title
US5113937A (en) * 1989-12-28 1992-05-19 Institut Francais De Petrole Device for separating a mixture of free gas and liquid at the intake of a pump at the bottom of a drilled well
US5507858A (en) * 1994-09-26 1996-04-16 Ohio University Liquid/gas separator and slug flow eliminator and process for use
US6277286B1 (en) * 1997-03-19 2001-08-21 Norsk Hydro Asa Method and device for the separation of a fluid in a well
GB2326895A (en) * 1997-07-03 1999-01-06 Schlumberger Ltd Separation of oil-well fluid mixtures by gravity
US6253855B1 (en) * 1999-01-21 2001-07-03 Mentor Subsea Technology Services, Inc. Intelligent production riser
US6537458B1 (en) 1999-03-05 2003-03-25 Shell Oil Company Three-phase separator
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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014029854A1 (en) * 2012-08-22 2014-02-27 Mærsk Olie Og Gas A/S A system and a method for separating liquid and gas flowing through a multiphase pipeline
DK177716B1 (en) * 2012-08-22 2014-04-07 Maersk Olie & Gas System and method for separating liquid and gas flowing through a multiphase pipeline
US10364661B2 (en) 2012-08-22 2019-07-30 Total E&P Danmark A/S System and a method for separating liquid and gas flowing through a multiphase pipeline
WO2015121058A1 (en) * 2014-02-12 2015-08-20 Mærsk Olie Og Gas A/S Separating system and method for separating liquid and gas flowing through a multiphase pipe
US10195545B2 (en) 2014-02-12 2019-02-05 Total E & P Danmark A/S Separating system and method for separating liquid and gas flowing through a multiphase pipe
DK179108B1 (en) * 2014-02-12 2017-11-06 Maersk Olie & Gas Separation system and method for separating liquid and gas flowing through a multiphase tube
FR3040066A1 (en) * 2015-08-10 2017-02-17 Technip France UNDERWATER INSTALLATION OF GAS / LIQUID SEPARATION
FR3040067A1 (en) * 2015-08-10 2017-02-17 Technip France METHOD AND UNDERWATER INSTALLATION OF GAS / LIQUID SEPARATION
US20190022560A1 (en) * 2015-08-10 2019-01-24 TECHNIP FRANCEé Underwater facility for gas/liquid separation
WO2017025689A1 (en) * 2015-08-10 2017-02-16 Technip France Underwater method and facility for gas/liquid separation
WO2017025690A1 (en) * 2015-08-10 2017-02-16 Technip France Underwater facility for gas/liquid separation
US10864462B2 (en) 2015-08-10 2020-12-15 Technip France Underwater facility for gas/liquid separation
CN106938152A (en) * 2017-03-29 2017-07-11 青岛理工大学 Tilt the tubular type separator of predrainage degassing under water
US20230101329A1 (en) * 2020-01-21 2023-03-30 Equinor Energy As Riser surge protection system
US11846155B2 (en) * 2020-01-21 2023-12-19 Equinor Energy As Riser surge protection system

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