WO2004078578A1 - Subsurface buoy and methods of installing, tying and dynamically stabilizing the same - Google Patents
Subsurface buoy and methods of installing, tying and dynamically stabilizing the same Download PDFInfo
- Publication number
- WO2004078578A1 WO2004078578A1 PCT/BR2003/000023 BR0300023W WO2004078578A1 WO 2004078578 A1 WO2004078578 A1 WO 2004078578A1 BR 0300023 W BR0300023 W BR 0300023W WO 2004078578 A1 WO2004078578 A1 WO 2004078578A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- subsurface buoy
- installation
- cylindrical body
- extremities
- chain
- Prior art date
Links
- 230000000087 stabilizing effect Effects 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000009434 installation Methods 0.000 claims abstract description 39
- 238000004873 anchoring Methods 0.000 claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 claims abstract description 20
- 210000002435 tendon Anatomy 0.000 claims abstract description 20
- 210000003414 extremity Anatomy 0.000 claims description 26
- 230000008878 coupling Effects 0.000 claims description 16
- 238000010168 coupling process Methods 0.000 claims description 16
- 238000005859 coupling reaction Methods 0.000 claims description 16
- 239000013535 sea water Substances 0.000 claims description 7
- 210000003141 lower extremity Anatomy 0.000 claims description 4
- 210000001364 upper extremity Anatomy 0.000 claims description 4
- 239000003381 stabilizer Substances 0.000 claims description 2
- 238000007667 floating Methods 0.000 abstract description 12
- 239000012530 fluid Substances 0.000 abstract description 6
- 239000003129 oil well Substances 0.000 abstract description 3
- 230000006641 stabilisation Effects 0.000 abstract description 2
- 238000011105 stabilization Methods 0.000 abstract description 2
- 230000001737 promoting effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000035899 viability Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 244000261422 Lysimachia clethroides Species 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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
- B63B22/04—Fixations or other anchoring arrangements
-
- 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
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B22/00—Buoys
- B63B22/04—Fixations or other anchoring arrangements
- B63B22/08—Fixations or other anchoring arrangements having means to release or urge to the surface a buoy on submergence thereof, e.g. to mark location of a sunken object
- B63B22/12—Fixations or other anchoring arrangements having means to release or urge to the surface a buoy on submergence thereof, e.g. to mark location of a sunken object the surfacing of the buoy being assisted by a gas released or generated on submergence of the buoy
Definitions
- the present invention relates to the field of oil-well equipment used in an intermediary region between a floating production unit at the ocean surface and a wellhead of an oil reservoir, or well, on the ocean floor.
- the equipment is designed to support rigid and flexible production tubes, or pipes, used for the transport of reservoir fluids f om the oil well and/or fluids used in support systems for the oil reservoir.
- a method of installing the equipment at its designed operating depth is also disclosed.
- SCR Steel Catenary Riser
- SCR may have desirable characteristics associated with the capacity to support, along their extremities, higher tension as compared to flexible risers; however, the flexible risers have longer life in terms of resisting fatigue even taking into account their interaction with ocean waves and currents.
- an intermediary system would be necessary, having sufficient floatation to support the weight of the rigid production tubes, while, at the same time, exhibiting only small displacements in response to the horizontal loading of SCRs and the environmental working loads.
- the system, or assembly would also need to be submersed sufficiently to protect it f om the effects of waves at the ocean surface, be capable to connect the SCR to the flexible riser, and be reasonably easy to install.
- the concept of a subsurface buoy, or float developed naturally, permitting a considerable reduction in the weight of the production tubes on the floating unit, improving undersea arrangement, and thus making possible the use of a hybrid system of risers.
- Hybrid systems of risers, based in a subsurface buoy have recently been recognized as an alternative to the limitations found in petroleum production activities in deep-sea water.
- Patent No. 4,423,984, assigned to Mobil Oil Corporation discloses a way to interconnect the flexible tubes originating at a surface unit and a rigid vertical riser with a buoy connected at the upper extremity of the vertical riser.
- the present invention relates to equipment designed to support and interconnect rigid and flexible tubes used in the production and transport of oil from an underwater well and/or fluids used in support systems for the reservoir.
- Such equipment is usually known as a subsurface buoy.
- a system to tie and to dynamically stabilize the buoy is also in the scope of the present invention. Additionally, a method is also disclosed to install the subsurface buoy at its location of operation.
- the subsurface buoy one of the objects of the present invention, comprises four interconnecting cylindrical units forming a single unit, each one of these cylindrical units having in its interior a plurality of draining compartments for the purpose of ballasting.
- Such a floating body resembles a quadrilateral frame defining a whole therethrough, having a plurality of fixed connections for interconnecting the rigid and flexible tubes thereto.
- a tying and dynamically stabilizing system, rigidly connected at each of the vertices of the subsurface buoy, is another object of the present invention.
- the tying and dynamically stabilizing system is designed to control the float position and the traction and the tension in the anchoring tendons, providing stabilization for the entire unit against large-amplitude rotation or changes in angular position even after the rigid and flexible tubes are couple or connected to the floating body, or buoy.
- chained sections formed by links will be referred to as “chains” and steel or polyester cables will be designated as "tendons.”
- Another object of the present invention is a method of installation of the subsurface buoy at its operating location with the fluid transport tubes connected thereto and the use of a system to tie and dynamically stabilize the subsurface float.
- FIG. 1 illustrates schematically a top view of the subsurface buoy according to the present invention
- FIG. 2 illustrates schematically a longitudinal cut of the top view of the subsurface buoy of FIG. 1;
- FIG. 2a illustrates schematically the details of a longitudinal cut of the ballast or draining compartments inside the cylindrical, or tubular, bodies that form the subsurface buoy of FIG. 1
- FIG. 3 illustrates schematically a top view of the subsurface buoy of FIG. 1 showing the rigid tubes, flexible tubes, intermediary tubes, and the tying and dynamically stabilizing system;
- FIG.4 illustrates a frontal view of the subsurface buoy of FIG. 1, detailing the tying and dynamically stabilizing system for the subsurface buoy of the present invention
- FIG. 4a illustrates a passive system, which is one of the integral parts of the tying and dynamically stabilizing system for the subsurface buoy of the present invention
- FIG. 4b illustrates a tension equalizing system, which is another integral part of the tying and dynamically stabilizing system for the subsurface buoy of the present invention.
- FIG. 5 illustrates a side view of the subsurface buoy of FIG. 1 with the tying and dynamically stabilizing system, the rigid tubes, the flexible tubes connected.
- FIG. 1 A top, view schematically representing the subsurface buoy of the present invention is illustrated in FIG. 1.
- the subsurface buoy comprises four cylindrical bodies, a first cylindrical body 1 and a second cylindrical body 2, having equal lengths and diameters
- the first and second cylindrical bodies are positioned longitudinally parallel and separate relative to one another.
- the side of the subsurface buoy where the first cylindrical body 1 is located will be referred to as the "starboard side.”
- a third cylindrical body 3 is connected, in a transversal position, having a larger diameter than the other two cylindrical bodies.
- the other extremities of the longitudinal cylindrical bodies (l) and (2) are also connected transversely to a fourth cylindrical body 4, having a length equal to that of the third cylindrical body 3, and having a diameter equal to those of the longitudinal cylindrical bodies (1) and (2).
- the side of the subsurface buoy where the third cylindrical body 3 is located will be referred to hereinafter as the "stern side.”
- the side of the subsurface buoy where the forth cylindrical body 4 located it will be referred to as the "bow or nose side,”.
- FIG. 2 illustrates a horizontal cut of a top view of the subsurface buoy of the present invention, wherein a plurality of draining compartments 6 are shown located internally in each of the cylindrical bodies 1, 2, 3, and 4.
- FIG. 2a schematically illustrates a longitudinal cut of anyone of the draining compartments 6 illustrated in FIG. 2.
- a first valve 7 for the introduction or removal of compressed air.
- a second valve 8 is connected for the ballasting purposes, allowing seawater in and out of each draining compartment 6.
- FIG. 3 illustrates the positioning of supports 9a and 9b, known in the art as "goose necks,” that serve to support the two types of tubes used in the transport of oil from the ocean floor to the surface, namely rigid tubes 10 and flexible tubes 11.
- Supports 9a and 9b are fixed to the transversal cylindrical bodies 3 and 4, respectively.
- supports 9a are installed to which, at one of their extremities, rigid tubes, or "SCRs,” are installed connecting the wellhead at the ocean floor to the subsurface buoy.
- Flexible tubes 11, or “Jumpers,” are installed on one of the extremities of supports 9b installed to the fourth cylindrical body 4, connecting the subsurface buoy to the floating production unit.
- Intermediary tubes 12 being aligned to the longitudinal cylindrical bodies (1) and (2) and interconnected to the rigid tubes 10 and flexible tubes 11, are connected to the other extremities of supports 9a and 9b.
- fixation points for the tying and dynamically stabilizing system 13 also used to install the subsurface buoy at its depth of operation.
- FIG. 4 illustrates in more detail the characteristics of the tying and dynamically stabilizing system 13, which comprises a passive system A and a tension equalization system B.
- the passive system A is passive because it does not use any source of energy (electric, hydraulic, pneumatic, or otherwise) to operate, serving only to install the subsurface buoy at its place of operation.
- Each one of the passive systems A is rigidly connected to the vertices of the subsurface buoy located at the upper extremities and sides of cylindrical bodies 3 or 4. The details of passive systems A are illustrated in FIG.
- pulleys, or runners, 14 connected to one of the upper extremities of the cylindrical bodies 3 or 4; , an installation chain, or cable, 15, passing over pulley 14, used as a counterweight during the float's descending operation to its depth of operation; a chain stopper 16, through the interior of which the installation chain 15 passes, rigidly connected to the extremities of each one of the tubular, or cylindrical, bodies 3 and 4, and used to limit the travel of the installation chain
- the tension equalizing system B after installation of the subsurface buoy at its operating position, is configured to maintain the tension in each anchoring tendon 21 equally distributed, connect the subsurface buoy to the ocean floor, and maintain the subsurface buoy in stable conditions, i.e., preventing unwanted variations in inclination caused by ocean currents or the weight of the tubes, or pipes, connected to the subsurface buoy.
- tension equalizing system B comprise: major-base pulleys 22 connected to lower extremities of the cylindrical bodies 3 and 4, one major-base pulley 22 being connected to one extremity of cylindrical body 3 and another to a diagonally opposed extremity of cylindrical
- minor-base pulleys 23 connected to the other lower extremities of the cylindrical bodies 3 and 4, one minor-base pulley 23 being connected to one extremity of cylindrical body 3 and another to a diagonally opposed extremity of cylindrical body 4; a first supporting component 24, passing over the major-base pulleys
- FIG. 5 illustrates a side view of a complete assembly of the subsurface buoy with the tying and dynamically stabilizing system 13 connected to the anchoring tendons 21 and to the rigid tubes 10 and flexible tubes 11, properly connected to supports 9 ⁇ and 9b.
- the scope of the present invention also comprises methods of installation of the subsurface buoy. Such methods will now be described, providing a better understanding of the function of each of the components of the present invention.
- the method of installation of the subsurface buoy comprises: driving anchoring stakes (not illustrated) into the ocean floor at predetermined installation locations, connecting anchoring tendons 21 to driving anchoring stakes, and connecting coupling plates 19 to anchoring tendons 21; connecting coupling plates 19 to the tension equalizing systems B; feeding each one of the installation chains 15 through points in each one of the passive systems A; connecting installation chains 15 to coupling plates 19 of the tension equalizing system B; connecting a supply line to each one of the valves 7 on draining compartments 6 located inside cylindrical bodies 1, 2, 3, and 4 in order to supply compressed air thereto; opening first valve 7 and second valve 8 from draining compartments 6 located inside cylindrical bodies 1, 2, 3, and 4 to allow flow of sea water therein; lowering slowly the subsurface buoy until the end-of -travel device 18 comes in contact with the chain stopper 16; injecting compressed air into each of the drain
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
- Earth Drilling (AREA)
- Cleaning Or Clearing Of The Surface Of Open Water (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0520252A GB2417011B (en) | 2003-03-06 | 2003-03-06 | Subsurface buoy and methods of installing,tying and dynamically stabilizing the same |
PCT/BR2003/000023 WO2004078578A1 (en) | 2003-03-06 | 2003-03-06 | Subsurface buoy and methods of installing, tying and dynamically stabilizing the same |
AU2003303990A AU2003303990A1 (en) | 2003-03-06 | 2003-03-06 | Subsurface buoy and methods of installing, tying and dynamically stabilizing the same |
EP03816127A EP1603796B1 (en) | 2003-03-06 | 2003-03-06 | Subsurface buoy and methods of installing, tying and dynamically stabilizing the same |
NO20054295A NO332013B1 (en) | 2001-07-31 | 2005-09-16 | Surface buoy, as well as method of installation binding and stabilization thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/BR2003/000023 WO2004078578A1 (en) | 2003-03-06 | 2003-03-06 | Subsurface buoy and methods of installing, tying and dynamically stabilizing the same |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004078578A1 true WO2004078578A1 (en) | 2004-09-16 |
Family
ID=32932161
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/BR2003/000023 WO2004078578A1 (en) | 2001-07-31 | 2003-03-06 | Subsurface buoy and methods of installing, tying and dynamically stabilizing the same |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1603796B1 (en) |
AU (1) | AU2003303990A1 (en) |
GB (1) | GB2417011B (en) |
WO (1) | WO2004078578A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105775078A (en) * | 2016-03-08 | 2016-07-20 | 中国石油大学(华东) | Water-gas replacement type underwater equipment auxiliary installation device and method |
WO2019059535A1 (en) * | 2017-09-21 | 2019-03-28 | 한국해양과학기술원 | Mooring rope device of floating offshore structure for avoiding ship collision, method for operating same, and method for installing same |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
CN103754340B (en) * | 2014-02-11 | 2014-12-10 | 中国石油大学(华东) | Buoyancy-adjustable device and method for auxiliary installation of underwater equipment |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4279047A (en) * | 1979-01-18 | 1981-07-21 | Bluewater Terminal Systems N.V. | Fluid transfer buoy |
US4423984A (en) | 1980-12-29 | 1984-01-03 | Mobil Oil Corporation | Marine compliant riser system |
US4449946A (en) * | 1981-11-16 | 1984-05-22 | Shell Oil Company | Single-point mooring system for transferring fluids |
US5007482A (en) | 1989-03-09 | 1991-04-16 | British Petroleum Co. P.L.C. | Offshore oil production system |
BR9202379A (en) | 1991-06-27 | 1993-01-26 | Bechtel Ltd | SYSTEM AND PROCESS DEPLOYMENT OF A MOORER AND PROCESS TO AVOID COLLISIONS BETWEEN A FLOATING OBSTACLE AND A PRODUCTION PLATFORM |
US5651709A (en) * | 1995-11-09 | 1997-07-29 | Nortrans Engineering Group Pte Ltd. | Cantenary anchor leg mooring buoy |
-
2003
- 2003-03-06 WO PCT/BR2003/000023 patent/WO2004078578A1/en not_active Application Discontinuation
- 2003-03-06 AU AU2003303990A patent/AU2003303990A1/en not_active Abandoned
- 2003-03-06 EP EP03816127A patent/EP1603796B1/en not_active Expired - Fee Related
- 2003-03-06 GB GB0520252A patent/GB2417011B/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4279047A (en) * | 1979-01-18 | 1981-07-21 | Bluewater Terminal Systems N.V. | Fluid transfer buoy |
US4423984A (en) | 1980-12-29 | 1984-01-03 | Mobil Oil Corporation | Marine compliant riser system |
US4449946A (en) * | 1981-11-16 | 1984-05-22 | Shell Oil Company | Single-point mooring system for transferring fluids |
US5007482A (en) | 1989-03-09 | 1991-04-16 | British Petroleum Co. P.L.C. | Offshore oil production system |
BR9202379A (en) | 1991-06-27 | 1993-01-26 | Bechtel Ltd | SYSTEM AND PROCESS DEPLOYMENT OF A MOORER AND PROCESS TO AVOID COLLISIONS BETWEEN A FLOATING OBSTACLE AND A PRODUCTION PLATFORM |
US5651709A (en) * | 1995-11-09 | 1997-07-29 | Nortrans Engineering Group Pte Ltd. | Cantenary anchor leg mooring buoy |
Non-Patent Citations (1)
Title |
---|
See also references of EP1603796A4 |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105775078A (en) * | 2016-03-08 | 2016-07-20 | 中国石油大学(华东) | Water-gas replacement type underwater equipment auxiliary installation device and method |
CN105775078B (en) * | 2016-03-08 | 2019-01-01 | 中国石油大学(华东) | Aqueous vapor displacement type underwater equipment auxiliary installation device and installation method |
WO2019059535A1 (en) * | 2017-09-21 | 2019-03-28 | 한국해양과학기술원 | Mooring rope device of floating offshore structure for avoiding ship collision, method for operating same, and method for installing same |
KR20190033301A (en) * | 2017-09-21 | 2019-03-29 | 한국해양과학기술원 | Mooring device of floating marine structure for avoid ship collision and operation method thereof and installing method thereof |
KR101984687B1 (en) | 2017-09-21 | 2019-05-31 | 한국해양과학기술원 | Mooring device of floating marine structure for avoid ship collision and operation method thereof and installing method thereof |
US11066131B2 (en) | 2017-09-21 | 2021-07-20 | Korea Institute Of Ocean Science & Technology | Mooring rope device of floating offshore structure for avoiding ship collision, method for operating same, and method for installing same |
Also Published As
Publication number | Publication date |
---|---|
GB2417011B (en) | 2007-03-14 |
EP1603796B1 (en) | 2011-05-04 |
AU2003303990A1 (en) | 2004-09-28 |
GB2417011A (en) | 2006-02-15 |
EP1603796A1 (en) | 2005-12-14 |
GB0520252D0 (en) | 2005-11-16 |
EP1603796A4 (en) | 2010-07-07 |
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