WO2011050064A1 - Hybrid buoyed and stayed towers and risers for deepwater - Google Patents
Hybrid buoyed and stayed towers and risers for deepwater Download PDFInfo
- Publication number
- WO2011050064A1 WO2011050064A1 PCT/US2010/053380 US2010053380W WO2011050064A1 WO 2011050064 A1 WO2011050064 A1 WO 2011050064A1 US 2010053380 W US2010053380 W US 2010053380W WO 2011050064 A1 WO2011050064 A1 WO 2011050064A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- riser
- buoyed
- hybrid
- assembly
- tower
- Prior art date
Links
Classifications
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/01—Risers
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/01—Risers
- E21B17/012—Risers with buoyancy elements
-
- 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
- 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 field of the invention is various configurations and methods for hybrid towers, and especially for buoyed and stayed tower and riser assemblies.
- flowline risers connect the floating vessel at the sea surface with the pipelines on the sea bed.
- FPSO floating production and storage vessel
- connection is not trivial, particularly where the offshore field is at a significant depth below sea level.
- most of the currently known structures negatively impact operational flexibility. For example, addition and/or removal, or maintenance of the flowline risers often interrupts continuous product flow.
- simple addition of new risers to existing structures is generally not possible in a cost-effective manner.
- the present invention is directed to hybrid riser tower configurations and methods that not only allow for simplified construction and installation, but also provide flexibility once installed. Moreover, contemplated towers can be coupled to each other via a structural truss or other static element to form operational structures with minimal impact on the marine environment.
- a hybrid buoyed and stayed tower and riser assembly comprises a support structure, and a plurality of dividers that are coupled to and radially extend from the support structure.
- a plurality of riser lines is coupled to at least one of the plurality of dividers via a coupling element, and a plurality of isolation valves are fluidly coupled to the plurality of riser lines, respectively, and configured to allow isolation of each individual riser within the tower and riser assembly.
- the coupling element and at least one of the dividers allows addition and/or removal of one or more riser lines by a remotely operated vehicle.
- a riser line includes a riser pipe that is contained in a housing, wherein the riser pipe and/or the housing is isolated by syntactic foam, and wherein the syntactic foam is applied in an amount effective to provide buoyancy to the at least one of the riser line.
- the support structure comprises a structural steel tube, wherein the support structure is at least partially enclosed by syntactic foam.
- the tower and riser assembly comprises a topside element having dynamic flexible jumpers and/or a bottom element having static flexible jumpers.
- two or more hybrid buoyed and stayed tower and riser assemblies are coupled to each other, preferably via a structural truss.
- the truss may be used in various functions, and most preferably to couple one or more steel catenary risers to the structural truss.
- one or more buoyed and stayed towers may be coupled to the assembly, preferably via a riser porch (that may allow for wet storage of flexible risers).
- a method of modifying a hybrid buoyed and stayed tower and riser assembly may include a step of providing a support structure and a plurality of dividers that are coupled to and radially extend from the support structure.
- a riser line is coupled to or removed from one or more dividers via a coupling element using a remote operable vehicle, a plurality of isolation valves are coupled to or uncoupled from the riser line using the remote operable vehicle to thereby fluidly couple or isolate a topside jumper and a bottom jumper to or from the riser line.
- the riser line comprises a riser pipe that is contained in a housing, wherein at least one of the riser pipe and the housing is isolated by syntactic foam, and wherein the syntactic foam is applied in an amount effective to provide buoyancy to the riser line.
- the support structure comprises a structural steel tube, and that the support structure is at least partially enclosed by syntactic foam.
- the hybrid buoyed and stayed tower and riser assembly is coupled to a second hybrid buoyed and stayed tower and riser assembly or to a buoyed and stayed tower, preferably via a structural truss.
- a steel catenary riser may be coupled to the structural truss.
- the structural truss is configured to allow for wet storage of flexible risers.
- a structural truss is configured for coupling a first hybrid buoyed and stayed tower and riser assembly or buoyed and stayed tower to a second hybrid buoyed and stayed tower and riser assembly or buoyed and stayed tower, and is further configured to allow the truss to act as a riser porch, or to receive and maintain a steel catenary riser and/or flexible jumper.
- first and second towers are coupled to buoyancy elements via respective tethers, it is typically preferred that the truss is coupled to the tethers.
- Figure 1 A is a cross section of a first exemplary hybrid riser according to the inventive subject matter
- Figure IB is a cross section of a second exemplary hybrid riser according to the inventive subject matter.
- Figures 2 A and 2BB are perspective detail views of the hybrid riser of Figure IB.
- Figures 3A and 3B are perspective detail views of exemplary top and bottom elements of hybrid risers according to the inventive subject matter.
- Figures 4A-4D are schematic illustrations of exemplary hybrid riser configurations according to the inventive subject matter.
- a hybrid riser tower can be configured such that all or almost all of the disadvantages of heretofore known systems and methods can be overcome in a conceptually simple and effective manner in which multiple riser lines are coupled to a hybrid riser tower via divider, wherein the coupling elements are configured to allow coupling and uncoupling operation using a remote operated vehicle under water.
- isolation valves such that individual riser lines can be fluidly isolated.
- such configurations will allow addition, removal, and/or replacement of one or more riser lines that are contained within a single deepwater hybrid riser tower without affecting operations during production.
- contemplated hybrid riser towers may further be coupled with at least one other hybrid riser tower or stayed and buoyed tower, preferably, via a truss to reduce adverse effects of unintended movement and to further provide for expansion capabilities as the truss may be configured as a riser porch and/or to allow for coupling a SCR to the truss.
- a hybrid riser tower 100A comprises a structural steel tube as a typically central support structure 110A. Coupled to the support structure 110A (typically in regular intervals) are a plurality of radially extending dividers 120 A, which may be configured to provide additional structural stability to the hybrid riser tower. Contemplated dividers are configured to receive at least a portion of riser line 140 A such that the riser line can be affixed to the divider 120 using coupling elements (see Figures 2A and 2B) via an ROV. The riser line may be enclosed in a housing (not shown) similar as depicted in Figure IB below.
- the riser lines are circumferentially coupled to the support structure and divider in equidistant positions, and additional lines (e.g., umbilicals 150A) may also be coupled to the divider in a peripheral position for remote addition and/or removal.
- Buoyancy of the hybrid riser tower is preferably achieved at least in part via syntactic foam layers 130A that surround the support structure between the dividers.
- additional buoyancy can be achieved using various gases in buoyancy chambers as is known in the art.
- a hybrid riser tower 100B comprises a structural steel tube as a typically central support structure HOB. Coupled to the support structure HOB (typically in regular intervals) are a plurality of radially extending dividers 120B, which may be configured to provide additional structural stability to the hybrid riser tower. Contemplated dividers 120B are configured to receive at least a portion of riser line 140B in a manner similar to Figure 1A above. However, in the example of Figure IB, the riser line is formed from a housing 146B that surrounds syntactic foam 144B, which in turn at least partially encloses riser pipe 142. Additional lines (e.g., umbilicals 150B) may then be routed through the divider or circumferentially as depicted in Figure 1 A above.
- Additional lines e.g., umbilicals 150B
- FIG. 2A schematically illustrates a detail view of an hybrid riser tower where the riser lines are contained in a housing with syntactic foam.
- coupling elements 260A cooperate with the dividers 220A to retain the riser line on the hybrid riser tower.
- additional syntactic foam 23 OA may be added to surround the central support structure.
- Additional lines 25 OA are routed through dividers 220 A.
- Figure 2B is a detail view of Figure 2A where coupling element 260B cooperates with a portion of the divider 220B to retain riser line 240B.
- Additional umbilical lines 250B are routed through divider 220B.
- the hybrid riser tower contemplated herein can be locally and substantially completely fabricated to form a free-standing hybrid riser tower that can be transported and installed using conventional offshore anchor handling and tow vessels. Moreover, contemplated configurations and methods presented herein allow multiple small risers from multiple reservoirs to be installed in one fabricated unit and so lower the overall cost per riser by taking advantage of the economies of scale. As a further advantage of the construction of the hybrid riser tower presented herein, it is now also possible to add, remove, and/or replace riser lines that are contained within a single deepwater hybrid riser tower without affecting operations during production.
- top and bottom elements of an hybrid riser tower assembly are schematically depicted in Figures 3A and 3B.
- the top element 302A is coupled to a buoyancy can 306 A, typically via a chain or other flexible structure, and fluidly coupled to the support structure and riser lines below via ROV operable coupling elements 360 A.
- Shroud 308 covers fluid connectors between the riser lines and the ports for the dynamic flexible jumpers, and isolation valve 304 A is coupled to the ports.
- the isolation valve may also be downstream of the port, e.g. , at the topside or end of the dynamic flexible jumper.
- Figure 3B depicts an exemplary bottom element having two independent portions 30 IB and 30 ⁇ .
- the individual riser lines are coupled to the bottom element via ROV operable coupling elements 360B, and static flexible jumpers are attached to the respective ports and isolation valves 303B.
- the isolation valves may also be placed at a position other than the bottom element, for example, at the other end of the static flexible jumpers or a position upstream thereof.
- the bottom element will also include a connector for anchoring the hybrid riser tower (here: roto-latch connector 309B).
- a single hybrid riser tower or multiple hybrid riser towers allow the motions of the FPSO to be de-coupled from the risers themselves by removing the large weight that would be supported by the FPSO if such towers were not available.
- flexible dynamic risers connect the free standing riser tower to the FPSO, and the flexible dynamic risers can be removed from the FPSO in an emergency (e.g. , storm) and stored on a subsea structural porch that is preferably created by coupling two or more free standing hybrid riser towers together with a structural truss or frame, or by coupling two free standing buoyed and stayed riser towers.
- Coupled to is intended to include both direct coupling (in which two elements that are coupled to each other contact each other) and indirect coupling (in which at least one additional element is located between the two elements). Therefore, the terms “coupled to” and “coupled with” are used synonymously.
- buoyed and stayed towers and risers presented herein will offer a unique solution with the addition of a cross-braced truss or other structure that couples two riser towers together to form a platform upon which steel catenary risers may be added to expand the offshore field development at a significantly smaller incremental cost than providing a stand alone riser since the platform already exists for expansion.
- Various exemplary configurations are schematically depicted in Figures 4A-4D.
- Figure 4A shows a hybrid riser tower 400A that receives product from a plurality of production lines 420A, wherein each production line has a respective isolation valve 402A and wherein each production line is fluidly coupled to respective static flexible jumpers 422A that are in turn fluidly coupled to respective riser lines in the hybrid riser tower.
- Product is then conveyed from the hybrid riser tower to the FPSO via respective dynamic flexible jumpers 41 OA.
- Capacity expansion of such configuration can be achieved as exemplarily shown in Figure 4B, where two hybrid riser tower 400B are coupled to each other via a structural truss 440B.
- hybrid riser tower 400B receives product from a plurality of production lines 420B, wherein each production line has a respective isolation valve 402B and wherein each production line is fluidly coupled to respective static flexible jumpers 422B that are in turn fluidly coupled to respective riser lines in the hybrid riser tower.
- Product is then conveyed from the hybrid riser tower to the FPSO via respective dynamic flexible jumpers 41 OA.
- steel catenary riser 430B is coupled to the truss 440B in a lazy wave configuration and also provides product to the FPSO.
- FIG. 4C where wet storage of the dynamic flexible jumpers is anticipated, configurations as exemplarily depicted in Figure 4C are contemplated.
- two stayed buoyed towers 401C are coupled to each other via a structural truss 440C that is configured as a riser porch upon which the dynamic flexible jumpers can be stored.
- Jumpers originate from hybrid riser tower 400C, which receives product via individual riser lines that are fluidly isolated from production lines 420C via isolation valves 402C.
- two hybrid riser towers 400D are coupled to each other via a structural element and further coupled via structural elements 44 ID to two stayed buoyed towers 40 ID, which are also coupled to each other via truss 440D.
- the truss and/or other structural element may be used as a riser porch, as a carrier for steel catenary risers 430D, and/or as reinforcing mechanism to reduce inadvertent contact and flexing of the hybrid riser towers beyond a desired degree.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/503,008 US9121228B2 (en) | 2009-10-21 | 2010-10-20 | Hybrid buoyed and stayed towers and risers for deepwater |
BR112012009486-6A BR112012009486A2 (en) | 2009-10-21 | 2010-10-20 | buoy towers and cable-stayed hybrids and subsea conductors for deep waters |
MX2012004688A MX2012004688A (en) | 2009-10-21 | 2010-10-20 | Hybrid buoyed and stayed towers and risers for deepwater. |
AU2010310741A AU2010310741B2 (en) | 2009-10-21 | 2010-10-20 | Hybrid buoyed and stayed towers and risers for deepwater |
CN201080057889.7A CN102782242B (en) | 2009-10-21 | 2010-10-20 | For the mixing float type of deep water and guyed tower and standpipe |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US25376509P | 2009-10-21 | 2009-10-21 | |
US61/253,765 | 2009-10-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011050064A1 true WO2011050064A1 (en) | 2011-04-28 |
Family
ID=43900663
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2010/053380 WO2011050064A1 (en) | 2009-10-21 | 2010-10-20 | Hybrid buoyed and stayed towers and risers for deepwater |
Country Status (6)
Country | Link |
---|---|
US (1) | US9121228B2 (en) |
CN (1) | CN102782242B (en) |
AU (1) | AU2010310741B2 (en) |
BR (1) | BR112012009486A2 (en) |
MX (1) | MX2012004688A (en) |
WO (1) | WO2011050064A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2500071A (en) * | 2012-03-05 | 2013-09-11 | Acergy France Sa | Riser tower with buoyancy modules |
US9334695B2 (en) | 2011-04-18 | 2016-05-10 | Magma Global Limited | Hybrid riser system |
FR3033358A1 (en) * | 2015-03-06 | 2016-09-09 | Saipem Sa | INSTALLATION COMPRISING AT LEAST TWO FOUNDAL SURFACE CONNECTIONS COMPRISING VERTICAL RISERS CONNECTED BY ARTICULATED BARS |
US11236550B2 (en) | 2017-02-21 | 2022-02-01 | Acergy France SAS | Fabrication of pipe bundles offshore |
Families Citing this family (9)
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FR2952671B1 (en) * | 2009-11-17 | 2011-12-09 | Saipem Sa | INSTALLATION OF FUND-SURFACE CONNECTIONS DISPOSED IN EVENTAIL |
GB2488828B (en) * | 2011-03-10 | 2014-08-20 | Subsea 7 Ltd | Restraint systems for hybrid decoupled risers |
BR112014005662B1 (en) * | 2011-09-16 | 2020-12-29 | Woodside Energy Technologies Pty Ltd | method for relocating a subsea manifoldriser system and relocatable subsea manifold riser system |
FR2988424B1 (en) * | 2012-03-21 | 2014-04-25 | Saipem Sa | INSTALLATION OF MULTI-RISERS HYBRID TILT TYPE FOUNDATION SURFACE CONNECTIONS COMPRISING POSITIVE FLOATABLE FLEXIBLE DUCTS |
GB2506938B (en) * | 2012-10-15 | 2015-08-05 | Subsea 7 Ltd | Improvements relating to buoyancy-supported risers |
FR3020858B1 (en) * | 2014-05-07 | 2016-06-10 | Technip France | METHOD FOR CONNECTING A DOWNWARD DRIVE AND AN AMOUNT OF DRIVING |
US9546523B1 (en) * | 2014-06-06 | 2017-01-17 | VIV Solutions LLC | Collars for multiple tubulars |
US9708864B2 (en) * | 2014-12-22 | 2017-07-18 | Ge Oil & Gas Uk Limited | Riser assembly and method of forming a riser assembly |
US20180266194A1 (en) * | 2015-12-21 | 2018-09-20 | Halliburton Energy Services, Inc. | Method and system for deployment of tubing strings for riser-less applications |
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2010
- 2010-10-20 BR BR112012009486-6A patent/BR112012009486A2/en not_active Application Discontinuation
- 2010-10-20 AU AU2010310741A patent/AU2010310741B2/en not_active Ceased
- 2010-10-20 CN CN201080057889.7A patent/CN102782242B/en not_active Expired - Fee Related
- 2010-10-20 MX MX2012004688A patent/MX2012004688A/en active IP Right Grant
- 2010-10-20 WO PCT/US2010/053380 patent/WO2011050064A1/en active Application Filing
- 2010-10-20 US US13/503,008 patent/US9121228B2/en active Active
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Publication number | Priority date | Publication date | Assignee | Title |
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GB2500071A (en) * | 2012-03-05 | 2013-09-11 | Acergy France Sa | Riser tower with buoyancy modules |
FR3033358A1 (en) * | 2015-03-06 | 2016-09-09 | Saipem Sa | INSTALLATION COMPRISING AT LEAST TWO FOUNDAL SURFACE CONNECTIONS COMPRISING VERTICAL RISERS CONNECTED BY ARTICULATED BARS |
WO2016142607A3 (en) * | 2015-03-06 | 2017-06-29 | Saipem S.A. | Facility comprising at least two bottom-surface links comprising vertical risers connected by bars |
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US11236550B2 (en) | 2017-02-21 | 2022-02-01 | Acergy France SAS | Fabrication of pipe bundles offshore |
Also Published As
Publication number | Publication date |
---|---|
AU2010310741A1 (en) | 2012-05-17 |
BR112012009486A2 (en) | 2020-08-18 |
AU2010310741B2 (en) | 2014-09-18 |
CN102782242A (en) | 2012-11-14 |
US20120292040A1 (en) | 2012-11-22 |
MX2012004688A (en) | 2012-06-14 |
CN102782242B (en) | 2015-12-16 |
US9121228B2 (en) | 2015-09-01 |
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