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US20050158126A1 - Flexible riser system - Google Patents

Flexible riser system Download PDF

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Publication number
US20050158126A1
US20050158126A1 US10/512,892 US51289204A US2005158126A1 US 20050158126 A1 US20050158126 A1 US 20050158126A1 US 51289204 A US51289204 A US 51289204A US 2005158126 A1 US2005158126 A1 US 2005158126A1
Authority
US
United States
Prior art keywords
buoy
mooring
seabed
catenary
riser system
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.)
Abandoned
Application number
US10/512,892
Other languages
English (en)
Inventor
Ange Luppi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Technip Energies France SAS
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to TECHNIP FRANCE reassignment TECHNIP FRANCE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LUPPI, ANGE
Publication of US20050158126A1 publication Critical patent/US20050158126A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B22/00—Buoys
    • B63B22/18—Buoys having means to control attitude or position, e.g. reaction surfaces or tether
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
    • B63B21/507—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers with mooring turrets
    • B63B21/508—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers with mooring turrets connected to submerged buoy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B22/00—Buoys
    • B63B22/02—Buoys specially adapted for mooring a vessel
    • B63B22/021—Buoys specially adapted for mooring a vessel and for transferring fluids, e.g. liquids
    • B63B22/023—Buoys specially adapted for mooring a vessel and for transferring fluids, e.g. liquids submerged when not in use
    • 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
    • E21B17/015—Non-vertical risers, e.g. articulated or catenary-type

Definitions

  • the present invention relates to a riser tower system intended to connect a fixed subsea installation such as a well head or a manifold to a floating surface unit such as a platform or a ship of the FPSO (Floating Platform Storage and Offloading) type.
  • a fixed subsea installation such as a well head or a manifold
  • a floating surface unit such as a platform or a ship of the FPSO (Floating Platform Storage and Offloading) type.
  • FPSO Floating Platform Storage and Offloading
  • the areas of turbulence which lie between 50 and 300 m below the surface of the water may have effects not only on the surface unit or installation which may move as a result of the swell and of other phenomena such as pitching, rolling, etc., but may also have an influence on the riser tower system which experiences forces due to the waves, to the wind and to marine currents.
  • riser tower systems are designed to withstand these stresses the magnitudes of which may vary.
  • U.S. Pat. No. 5,639,187 describes a system which combines rigid pipes and flexible pipes to establish the fluid communication between the fixed subsea installation and the surface unit, the system comprising a submerged buoy which is anchored to the seabed by means of four taut tethers, each of the tethers being attached to the ends of the buoy and to a corner of a kind of rectangle formed on the seabed, so as to minimize the rotation of the buoy that could be brought about by horizontal forces and by the weight of the pipes running between the buoy and the seabed.
  • the system is of the tension leg type, these having to withstand vertical loadings of at least 1500 tonnes and even more in order, especially during installation, to react the buoyancy of the buoy which has to be greater than the weight of the pipes, of which there are a great many in such an application.
  • the submerged buoy has also to have a reserve of buoyancy so as to give the entire system the stiffness it needs to limit its lateral movements. What happens is that the lateral movements of the buoy are undesirable because they bend the rigid pipes to bend radii such that these pipes may experience plastic deformation and thus cause the beginning of crushing by ovalization at the sag bend.
  • the sag bend lies over the touchdown point which is where the pipes touchdown onto the seabed.
  • the purpose of the present invention is to propose at least a riser tower system which is better suited to the movements of the surface unit, simple to produce and to install and less expensive than the systems of the prior art, for comparable operating conditions.
  • One subject of the present invention is a riser tower system intended to connect a fixed subsea installation to a surface unit, of the type comprising at least one flexible pipe arranged in a catenary and extending between the surface installation and a submerged buoy, at least one riser arranged in a catenary between the said buoy and the seabed, the said buoy being anchored to the seabed by a tether device comprising at least two taut tethers, and which is characterized in that it comprises at least two moorings in a catenary and on which there are provided return means which exert on the said buoy a return force that depends on the lateral movement of the said buoy.
  • One advantage of the present invention lies in the fact that, when the submerged buoy moves laterally, it is automatically returned to its initial position or position of equilibrium by the return means the force of which is variable, that is to say that they develop a return force which is dependent upon the amplitude of the lateral movement of the buoy.
  • the return means consist of a ballast weight which is distributed on each side of the touchdown point where the mooring touches down on the seabed.
  • the ballast weight can be of any kind, such as chains, balls, weights or alternatively clump-weight.
  • each mooring is connected to the buoy by a flange or mooring bridle arranged under the buoy and intended to prevent or at the very least limit the rotation of the buoy.
  • FIG. 1 is a schematic view in elevation of the riser tower system according to one embodiment of the invention.
  • FIG. 2 is a schematic view in elevation of the riser tower system for several lateral positions of the buoy.
  • the riser system 1 depicted schematically in FIG. 1 is intended to connect a fixed subsea installation 2 , consisting for example of a well head, a manifold or some other collector and delivering a product from an oil deposit or the like, to a floating surface unit or installation 3 such as a platform or an FPSO, the distance separating the surface 3 and subsea 2 installations being possibly as much as several thousands of metres.
  • a buoy 5 which is anchored to the seabed 6 by two tethers 7 , 8 which are stretched between the buoy 5 and a deadweight 9 or other anchoring means (suction pile).
  • One or several flexible pipes 10 running in a catenary between the surface unit 3 and the buoy 5 are connected to one or several risers 11 extending in a catenary between the buoy 5 and the fixed subsea installation 2 so that fluid communication is established between the said installations 2 and 3 .
  • the risers running in a catenary from the buoy on the seabed may be of any type such as rigid pipes commonly known as SCRs (Steel Catenary Risers), single-walled or pipe in pipe and even flexible pipes or hybrid pipes having at least one flexible part and one rigid part.
  • the riser tower system comprises at least two moorings 18 , 19 arranged in a catenary between the buoy 5 and the seabed 6 .
  • Each mooring 18 , 19 comprises, in the lower portion 14 , a part 13 which is weighted by a ballast weight 12 .
  • This ballast weight 12 constitutes return means for the buoy, the return force being dependent chiefly upon the lateral movement that the said buoy 5 might have and which may be caused by a strong swell, marine currents and more generally by movements of the surface unit 3 .
  • the ballast weights 12 are distributed on each side of the touchdown point 15 which is the region or point where the mooring touches down on the seabed 6 .
  • the ballast weights 12 may consist of weights, balls, chains or clump-weight. The ballast weights are distributed on each side of the touchdown point when the buoy is in its position of equilibrium (central position A in FIG. 2 ).
  • the tethers 7 , 8 are roughly vertical and the weighted parts 13 of the moorings 18 , 19 rest for the most part on the seabed 6 .
  • the weighted parts 13 rest more on the seabed whereas in the position B, the weighted parts 13 are lifted and thus develop a return force which has a tendency to return the system towards the position A, the return force varying according to the weighted length raised off the seabed by the movement of the corresponding mooring, which movement is brought about by the lateral movement of the buoy 5 ( FIG. 2 ).
  • the ballast weight on each mooring 18 , 19 consists of 4-inch ( ⁇ 10 cm) chains spread over a 100 m, in the knowledge that when the buoy 5 is at the mid-point (vertical), about one third of the ballast weight is raised off the bed and produces a tension of about 50 tonnes in each mooring 18 , 19 .
  • these indications are given solely by way of example, the choice and arrangement of the elements of which the ballast weight is made being dependent on the particular case envisaged.
  • the weight per unit length used to weight the catenary mooring 18 , 19 is dependent in particular on the distance between the buoy 5 and the seabed 6 .
  • Each taut tether 7 , 8 is attached to a comer 16 of a flange or mooring bridle 17 fixed to the buoy at one end thereof, and which is also intended to prevent or greatly limit the rotation of the buoy.
  • the points of attachment of the tethers 7 , 8 to the flanges 17 are preferably roughly in the midplane passing through the longitudinal axis 18 of the buoy 5 .
  • the midplane comprising the tethers 7 , 8 is embodied in dotted line X-X.
  • Each mooring 18 , 19 is connected to an end 20 of the buoy 5 which is the opposite end to the other lateral end 21 to which the riser or risers is or are connected. It may also be connected to the top 16 of the flange 17 so that the points of attachment of the moorings 18 , 19 lie more or less in the midplane in which the points of attachment of the moorings 7 , 8 to the buoy 5 are situated.
  • the buoy 5 has variable buoyancy and comprises several parts, for example three parts 22 to 24 each consisting of a hollow cylinder.
  • the buoy 5 makes it possible to avoid having to develop very high forces at the buoy 5 , which forces are dependent in particular on the number and weight of risers to be provided between the seabed 6 and the said buoy 5 .
  • each cylinder 22 to 24 constitutes a compartment which can be partially or completely emptied as additional risers are added.
  • the compartments are filled with an appropriate fluid such as water.
  • part of a compartment is emptied and filled with gas, the amount emptied being a function of the weight of the riser fitted. This procedure then continues sequentially and in the same way for the other risers.
  • the risers 11 are connected to the associated flexible pipes 10 by end fitting connections in a way known per se.
  • These risers 11 are supported by the buoy by a connection and suspension receptacle device shown schematically in FIG. 1 and referenced 30 , in which their terminal end fitting is housed. It can be noted that this device may comprise damping means intended to allow the risers a certain angular excursion with respect to the buoy at their connection.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
US10/512,892 2002-04-29 2003-04-09 Flexible riser system Abandoned US20050158126A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0205378A FR2839110B1 (fr) 2002-04-29 2002-04-29 Systeme de colonne montante reliant une installation sous-marine fixe a une unite de surface flottante
FR02/05378 2002-04-29
PCT/FR2003/001119 WO2003093627A1 (fr) 2002-04-29 2003-04-09 Systeme de colonne montante flexible

Publications (1)

Publication Number Publication Date
US20050158126A1 true US20050158126A1 (en) 2005-07-21

Family

ID=28800027

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/512,892 Abandoned US20050158126A1 (en) 2002-04-29 2003-04-09 Flexible riser system

Country Status (6)

Country Link
US (1) US20050158126A1 (fr)
AU (1) AU2003246801A1 (fr)
BR (1) BR0309592B8 (fr)
FR (1) FR2839110B1 (fr)
OA (1) OA12814A (fr)
WO (1) WO2003093627A1 (fr)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060062635A1 (en) * 2004-09-21 2006-03-23 Kellogg Brown And Root, Inc. Concentrated buoyancy subsea pipeline apparatus and method
US20060067792A1 (en) * 2004-09-21 2006-03-30 Kellogg Brown And Root, Inc. Distributed buoyancy subsea pipeline apparatus and method
GB2429992A (en) * 2005-09-09 2007-03-14 2H Offshore Engineering Ltd Production system
US20070081862A1 (en) * 2005-10-07 2007-04-12 Heerema Marine Contractors Nederland B.V. Pipeline assembly comprising an anchoring device and method for installing a pipeline assembly comprising an anchoring device
US20080196899A1 (en) * 2004-04-27 2008-08-21 Stolt Offshore Sa Marine Riser Tower
US20080253842A1 (en) * 2005-10-07 2008-10-16 Heerema Marine Contractors Nederland B.V. Pipeline Assembly Comprising an Anchoring Device
US20110017465A1 (en) * 2008-04-09 2011-01-27 AMOG Pty Ltd. Riser support
US20110129305A1 (en) * 2009-11-30 2011-06-02 Tim Latham Withall Riser support system
US20110146797A1 (en) * 2007-11-16 2011-06-23 Wellstream International Limited Flexible pipe support
AU2007303175B2 (en) * 2006-10-05 2011-08-11 Shell Internationale Research Maatschappij B.V. Hybrid riser systems and methods
US20110274501A1 (en) * 2008-11-05 2011-11-10 Jeroen Remery Method for assembling an operating rig for a fluid in a body of water and associated operating rig
US20110318110A1 (en) * 2009-02-10 2011-12-29 You Sun Li Free standing steel catenary risers
US20120298373A1 (en) * 2010-01-05 2012-11-29 Ange Luppi Assembly for supporting at least one fluid transport pipe through an expanse of water, and associated facility and method
US20130277061A1 (en) * 2010-11-17 2013-10-24 Ange Luppi Tower for exploiting fluid in an expanse of water and associated installation method
US20130292129A1 (en) * 2010-11-09 2013-11-07 Wellstream International Limited Solid oxide fuel cell system
US20140041878A1 (en) * 2011-04-18 2014-02-13 Magma Global Limited Hybrid Riser System
US20140137664A1 (en) * 2011-06-26 2014-05-22 The Regents Of The University Of California Inexpensive instrument for measuring wave exposure and water velocity
US20140338919A1 (en) * 2011-11-30 2014-11-20 François Régis Pionetti Multiple Flexible Seafloor-Surface Linking Apparatus Comprising At Least Two Levels
US8905143B2 (en) * 2009-11-25 2014-12-09 Subsea 7 Limited Riser configuration
US20150247366A1 (en) * 2012-10-15 2015-09-03 Subsea 7 Limited Relating to Buoyancy-Supported Risers
CN114030561A (zh) * 2021-11-09 2022-02-11 广东海洋大学 一种深海采油平台用系泊系统
US11434732B2 (en) * 2019-01-16 2022-09-06 Excelerate Energy Limited Partnership Floating gas lift method

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DE602004004382D1 (de) * 2003-03-26 2007-03-08 Saipem Sa Vorrichtung und verfahren für die stabilisierung und kontrolle der niedergang und des aufstiegs einer schweren struktur zwischen meeresoberfläche und meeresboden
RU2384857C1 (ru) * 2008-12-17 2010-03-20 Сергей Алексеевич Бахарев Способ поиска и подъема на поверхность моря объекта, установленного ранее на морском дне
FR2952671B1 (fr) 2009-11-17 2011-12-09 Saipem Sa Installation de liaisons fond-surface disposees en eventail
GB2481787A (en) * 2010-06-29 2012-01-11 Subsea 7 Ltd A method and apparatus for installing a buoy to an anchoring location
US8967912B2 (en) 2010-06-29 2015-03-03 Subsea 7 Limited Method of installing a buoy and apparatus for tensioning a buoy to an anchoring location
NO334840B1 (no) * 2012-04-30 2014-06-16 Selantic As Nedtrekksarrangement for utskiftning av undervanns forankringsliner
CN112594447B (zh) * 2020-12-24 2025-06-17 南方海洋科学与工程广东省实验室(湛江) 海洋温差能冷水管系统底部固定装置及方法

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US5480264A (en) * 1994-09-07 1996-01-02 Imodco, Inc. Offshore pipeline system
US5639187A (en) * 1994-10-12 1997-06-17 Mobil Oil Corporation Marine steel catenary riser system
US6062769A (en) * 1998-08-06 2000-05-16 Fmc Corporation Enhanced steel catenary riser system

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US4188156A (en) 1978-06-01 1980-02-12 Cameron Iron Works, Inc. Riser

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US1888156A (en) * 1931-01-22 1932-11-15 Willy F Bielicke Objective lens system
US3111962A (en) * 1959-11-16 1963-11-26 Weston Hydraulics Ltd Pressure regulating valve
US3677302A (en) * 1970-03-09 1972-07-18 Subsea Equipment Ass Ltd Bi-axial articulating pipeline structure
US4031919A (en) * 1971-10-06 1977-06-28 Exxon Production Research Company Articulated riser
US4155673A (en) * 1977-05-26 1979-05-22 Mitsui Engineering & Shipbuilding Co. Ltd. Floating structure
US4182584A (en) * 1978-07-10 1980-01-08 Mobil Oil Corporation Marine production riser system and method of installing same
US4448266A (en) * 1980-11-14 1984-05-15 Potts Harold L Deep water riser system for offshore drilling
US4400109A (en) * 1980-12-29 1983-08-23 Mobil Oil Corporation Complaint riser yoke assembly with breakway support means
US4423984A (en) * 1980-12-29 1984-01-03 Mobil Oil Corporation Marine compliant riser system
US4388022A (en) * 1980-12-29 1983-06-14 Mobil Oil Corporation Flexible flowline bundle for compliant riser
US4648848A (en) * 1985-11-12 1987-03-10 Fluor Corporation Spar buoy fluid transfer system
US5480264A (en) * 1994-09-07 1996-01-02 Imodco, Inc. Offshore pipeline system
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US6062769A (en) * 1998-08-06 2000-05-16 Fmc Corporation Enhanced steel catenary riser system

Cited By (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080196899A1 (en) * 2004-04-27 2008-08-21 Stolt Offshore Sa Marine Riser Tower
US8136599B2 (en) * 2004-04-27 2012-03-20 Acergy France S.A. Marine riser tower
US7963721B2 (en) * 2004-09-21 2011-06-21 Kellogg Brown & Root Llc Distributed buoyancy subsea pipeline apparatus and method
US20060067792A1 (en) * 2004-09-21 2006-03-30 Kellogg Brown And Root, Inc. Distributed buoyancy subsea pipeline apparatus and method
US7025533B1 (en) * 2004-09-21 2006-04-11 Kellogg Brown & Root, Inc. Concentrated buoyancy subsea pipeline apparatus and method
US20060062635A1 (en) * 2004-09-21 2006-03-23 Kellogg Brown And Root, Inc. Concentrated buoyancy subsea pipeline apparatus and method
US20080056825A1 (en) * 2004-09-21 2008-03-06 Joshi Khamir G Distributed buoyancy pipeline installation method
US7819608B2 (en) 2004-09-21 2010-10-26 Kellogg Brown & Root Llc Distributed buoyancy pipeline installation method
GB2429992A (en) * 2005-09-09 2007-03-14 2H Offshore Engineering Ltd Production system
US20070056742A1 (en) * 2005-09-09 2007-03-15 2H Offshore Engineering Ltd. Production system
US7591316B2 (en) 2005-09-09 2009-09-22 2H Offshore Engineering Ltd. Production system
US8123437B2 (en) 2005-10-07 2012-02-28 Heerema Marine Contractors Nederland B.V. Pipeline assembly comprising an anchoring device
US20080253842A1 (en) * 2005-10-07 2008-10-16 Heerema Marine Contractors Nederland B.V. Pipeline Assembly Comprising an Anchoring Device
US20070081862A1 (en) * 2005-10-07 2007-04-12 Heerema Marine Contractors Nederland B.V. Pipeline assembly comprising an anchoring device and method for installing a pipeline assembly comprising an anchoring device
AU2007303175B2 (en) * 2006-10-05 2011-08-11 Shell Internationale Research Maatschappij B.V. Hybrid riser systems and methods
US8480334B2 (en) 2006-10-05 2013-07-09 Shell Oil Company Hybrid riser systems and methods
EP2220333B2 (fr) † 2007-11-16 2017-10-04 GE Oil & Gas UK Limited Support pour tuyau flexible
US20110146797A1 (en) * 2007-11-16 2011-06-23 Wellstream International Limited Flexible pipe support
US9714727B2 (en) 2007-11-16 2017-07-25 Ge Oil & Gas Uk Limited Flexible pipe support
US20110017465A1 (en) * 2008-04-09 2011-01-27 AMOG Pty Ltd. Riser support
US20110274501A1 (en) * 2008-11-05 2011-11-10 Jeroen Remery Method for assembling an operating rig for a fluid in a body of water and associated operating rig
US8734055B2 (en) * 2008-11-05 2014-05-27 Technip France Method for assembling an operating rig for a fluid in a body of water and associated operating rig
US20110318110A1 (en) * 2009-02-10 2011-12-29 You Sun Li Free standing steel catenary risers
US8596913B2 (en) * 2009-02-10 2013-12-03 Shell Oil Company Free standing steel catenary risers
US8905143B2 (en) * 2009-11-25 2014-12-09 Subsea 7 Limited Riser configuration
US20110129305A1 (en) * 2009-11-30 2011-06-02 Tim Latham Withall Riser support system
AU2011204548B2 (en) * 2010-01-05 2016-03-24 Technip France Assembly for supporting at least one fluid transport pipe through an expanse of water, and associated facility and method
US20120298373A1 (en) * 2010-01-05 2012-11-29 Ange Luppi Assembly for supporting at least one fluid transport pipe through an expanse of water, and associated facility and method
US8893802B2 (en) * 2010-01-05 2014-11-25 Technip France Assembly for supporting at least one fluid transport pipe through an expanse of water, and associated facility and method
US9074427B2 (en) * 2010-11-09 2015-07-07 Ge Oil & Gas Uk Limited Riser assembly and method
US20130292129A1 (en) * 2010-11-09 2013-11-07 Wellstream International Limited Solid oxide fuel cell system
US9322222B2 (en) * 2010-11-17 2016-04-26 Technip France Tower for exploiting fluid in an expanse of water and associated installation method
US20130277061A1 (en) * 2010-11-17 2013-10-24 Ange Luppi Tower for exploiting fluid in an expanse of water and associated installation method
US9334695B2 (en) * 2011-04-18 2016-05-10 Magma Global Limited Hybrid riser system
US20140041878A1 (en) * 2011-04-18 2014-02-13 Magma Global Limited Hybrid Riser System
US20140137664A1 (en) * 2011-06-26 2014-05-22 The Regents Of The University Of California Inexpensive instrument for measuring wave exposure and water velocity
US9518682B2 (en) * 2011-11-30 2016-12-13 Saipem S.A. Multiple flexible seafloor-surface linking apparatus comprising at least two levels
US20140338919A1 (en) * 2011-11-30 2014-11-20 François Régis Pionetti Multiple Flexible Seafloor-Surface Linking Apparatus Comprising At Least Two Levels
US20150247366A1 (en) * 2012-10-15 2015-09-03 Subsea 7 Limited Relating to Buoyancy-Supported Risers
US9422773B2 (en) * 2012-10-15 2016-08-23 Subsea 7 Limited Relating to buoyancy-supported risers
US11434732B2 (en) * 2019-01-16 2022-09-06 Excelerate Energy Limited Partnership Floating gas lift method
CN114030561A (zh) * 2021-11-09 2022-02-11 广东海洋大学 一种深海采油平台用系泊系统

Also Published As

Publication number Publication date
WO2003093627A1 (fr) 2003-11-13
FR2839110B1 (fr) 2004-12-03
BR0309592B1 (pt) 2013-01-08
BR0309592A (pt) 2005-03-01
AU2003246801A1 (en) 2003-11-17
FR2839110A1 (fr) 2003-10-31
OA12814A (en) 2006-07-10
BR0309592B8 (pt) 2013-02-19

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