EP2393707B1 - Conception d'un element anti-vibratoire pour coque de plateforme spar et procede d'installation - Google Patents

Conception d'un element anti-vibratoire pour coque de plateforme spar et procede d'installation Download PDF

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Publication number
EP2393707B1
EP2393707B1 EP10703570.1A EP10703570A EP2393707B1 EP 2393707 B1 EP2393707 B1 EP 2393707B1 EP 10703570 A EP10703570 A EP 10703570A EP 2393707 B1 EP2393707 B1 EP 2393707B1
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EP
European Patent Office
Prior art keywords
strake
spar
panels
panel
belly
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.)
Active
Application number
EP10703570.1A
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German (de)
English (en)
Other versions
EP2393707A2 (fr
Inventor
Michael Y.H. Luo
Harvey O. Mohr
Lixin Zhang
Kostas Filoktitis Lambrakos
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Technip Energies France SAS
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Technip France SAS
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Publication of EP2393707A2 publication Critical patent/EP2393707A2/fr
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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 
    • B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
    • B63B39/005—Equipment to decrease ship's vibrations produced externally to the ship, e.g. wave-induced vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
    • B63B1/04—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with single hull
    • B63B1/048—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with single hull with hull extending principally vertically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B63B35/4406—Articulated towers, i.e. substantially floating structures comprising a slender tower-like hull anchored relative to the marine bed by means of a single articulation, e.g. using an articulated bearing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B63B2035/442—Spar-type semi-submersible structures, i.e. shaped as single slender, e.g. substantially cylindrical or trussed vertical bodies

Definitions

  • the inventions disclosed and taught herein relate generally to oil and gas drilling and production equipment; and more specifically relate to an improved design and installation method for belly strakes useful for stabilizing floating, deep-water offshore oil and gas drilling and production platforms.
  • Offshore oil and gas drilling and production operations can involve the provision of a vessel, or platform, sometimes called a rig, on which the drilling, production and storage equipment, together with the living quarters of the personnel manning the platform, if any, may be mounted.
  • offshore platforms fall into one of two classes, that is, “fixed” and “floating” platforms.
  • Fixed platforms often comprise an equipment deck supported by legs that can be seated directly or indirectly on the sea floor. While relatively stable, they are typically limited to relatively shallow waters, e.g., depths of about 500 feet (approximately 152 m) and less.
  • at least one so-called “compliant piled tower” (CPT) platform which is referred to as the "Baldpate” tower, is said to be operating at a depth of 1648 ft. (approximately 500 m).
  • Floating platforms are typically employed in water depths of about 500 ft. (approximately 152 m) and greater, and may be held in position over the well site by, as examples, mooring lines anchored to the sea floor, motorized thrusters located on the sides of the platform or both.
  • floating platforms may be more complex to operate because of their movement in response to environmental conditions, such as wind and water movement, they are generally capable of operating in substantially greater water depths than are fixed platforms.
  • Floating platforms may also be more mobile, and hence, easier to move to other well sites.
  • There are several different types of known floating platforms such as, for example, so-called “drill ships,” tension-leg platforms (TLPs), semi-submersibles, and spar platforms.
  • Spar platforms for example, comprise long, slender, buoyant hulls that give them the appearance of a column, or spar, when floating in an upright, operating position, in which an upper portion extends above the waterline and a lower portion is submerged below it. Because of their relatively slender, elongated shape, they have relatively deeper drafts, and hence, substantially better heave characteristics, e.g., much longer natural periods in heave, than other types of platforms. Accordingly, spar platforms have been thought of by some as a relatively successful platform design over the years. Examples of spar-type floating platforms used for oil and gas exploration, drilling, production, storage, and gas flaring operations may be found in the patent literature in, e.g., U.S. Pat. No.
  • spar-type platforms include some aspects that need improvement.
  • they can be relatively more complex to manage during offshore operations under some conditions than other types of platforms in terms of, for example, control over their trim and stability.
  • spar platforms may be particularly susceptible to vortex-induced vibrations (VIV), which may result from strong water currents acting on the hull of the platform.
  • VIV vortex-induced vibrations
  • the provision of apparatus on the elongated hulls for vortex breaking, or controlled vortex-shedding, can reduce or eliminate this problem.
  • U.S. Pat. Nos. 6,148,751 and 6,349,664 to Brown et al.
  • the first possibility may include towing the spar on the surface of the water, such as with tug boats, for a "wet tow" transport.
  • the belly strakes may be installed around the hull if the draft of the hull plus the strake panel width does not exceed the yard and the ship channel water depth, normally 45 ft. (14 m).
  • the draft in the yard and/or ship channel may be low, which may make it difficult or impossible to have the fully extended strakes around the hull.
  • the second possibility may include towing the spar on a Heavy Lift Vessel ("HLV”) for a "dry tow" transport.
  • HBV Heavy Lift Vessel
  • the spar hull is dry transported using a HLV from a remote fabrication yard to a near fabrication yard.
  • the final outfitting will be completed in a near fabrication yard.
  • the final outfitting may include removal of dry tow transportation supports and aids, installation of remaining wet tow aids and lightweight survey of the hull.
  • the hull will be wet towed to the offshore site.
  • the belly strakes can be installed in the quayside of the yard by rotating the spar hull.
  • the belly stake may need to be installed offshore due to the limited water depth of the ship channel, for example.
  • the inventions disclosed and taught herein are directed to an improved system and method for designing and installing a belly strake for a spar with a large diameter hull.
  • a spar hull for a floating vessel may include a hard tank having an outer surface, which can include a belly portion, a fixed strake and a folding strake configured to be selectively folded toward the outer surface of the tank.
  • the strakes can be coupled to any portion of the spar hull, such as the outer surface of the hard tank.
  • the folding strake can have one or more strake panels, which can be coupled, such as for rotation, to one or more portions of the spar hull, for example, to a belly side.
  • the folding strake can have one or more folded or unfolded positions and can include structure for locking the strake in one or more positions.
  • the folding strake can include one or more strake panels and support frames, each of which can, but need not, be configured to be coupled, such as rotatably, to the side of the spar hull.
  • one or more support frames can be coupled to the side of the spar hull and the strake panels rotatably coupled to the support frames that collectively form a strake surface when the strake panels are unfolded.
  • the panels and/or frames can have one or more folded or unfolded positions and the support frame can, but need not, be configured to support the strake panel, directly or otherwise, when the frame and/or panel are in one or more respective unfolded positions.
  • a method for utilizing belly strakes on a spar hull for floating vessels can include providing a floating spar having a hard tank and a belly side, transporting the spar to a deep water pit, rotating the spar so that the belly side is in a first workable position, which can be any position, and coupling at least one folding strake to the belly side of the spar.
  • the method may further include fixing the strake in a folded position, such as for transport or tow, and rotating the spar to a second position, such as for wet tow transport.
  • the folding belly strake may include one or more frames and/or panels, which may be fitted or removed before transport or final positioning.
  • the method may include unfolding one or more components of the strake and coupling those components in a position for operations, fixed or otherwise.
  • a method of utilizing a spar hull for offshore oil and gas operations may include providing a spar hull having a belly strake, wherein at least a portion of the belly strake has folded and unfolded positions, fixing the strake in the folded position, positioning the spar hull offshore in a transport position, upending the spar hull, unfolding the strake, fixing the strake in an unfolded position and positioning the spar hull in the installed position.
  • Unfolding the strake may include unfolding one or more support frames and/or strake panels.
  • Applicants have invented a belly strake system, design and installation method for a spar having a large diameter spar hull.
  • the spar hull without the belly strake may be towed, for example, dry towed on a heavy lift vessel (HLV), from a fabrication yard to a float-off site.
  • the spar hull can be offloaded at the float-off site, for example, into a deep water-filled pit or tank (such as a 77 ft. (23 m) deep water pit in Kiewit Offshore Services yard, Texas, USA) for preparing or outfitting the spar hull for operations.
  • a deep water-filled pit or tank such as a 77 ft. (23 m) deep water pit in Kiewit Offshore Services yard, Texas, USA
  • the hull can be rolled about its longitudinal axis, for example, 180°with its bare belly side upward in the pit, for allowing access to a portion of the hull where a strake may be coupled thereto.
  • a belly strake such as a foldable strake, can be installed on the belly side in the quayside.
  • the spar hull can be rolled back toward or to its original position with the strake and belly side toward the sea bed or other bottom of the deep water pit and towed to another site, such as its permanent site for operations.
  • the tow can pass through a shallow water depth zone, such as a 45 ft. (14 m) deep channel, for example. Once the spar arrives at a location for operations, it can be upended.
  • the strake panels can be unfolded and fixed in place, such as by installing fasteners to lock the strake panels into an unfolded position.
  • One or more support frames can be utilized to support the strake panels, and in some embodiments, the support frames can be folded, as well.
  • the systems and methods described herein can reduce the time and costs associated with the installation and use of belly strakes on spar hulls.
  • installing the foldable strake panels on the quayside can reduce or eliminate offshore swage, grouting, or other steps, and the time and costs associate therewith.
  • Another of many advantages of the present invention may include improvement of the dimension control associated with strakes or spar hulls.
  • the present inventions can allow the folded support frames and/or folded strake panels to be unfolded in the yard, such as for performing one or more system integration tests (SITs).
  • SITs system integration tests
  • the strake supports and panels can be folded and temporarily coupled to the hull, such as with temporary sea fastening.
  • This can allow, for example, the strake panels to be quickly and accurately installed on the strake support frame during offshore operations, which may help ensure safety and efficiency.
  • the present inventions may eliminate the need for a lifting vessel for strake panel installation at the site of operations, such as the permanent rig site, which can significantly reduce operations costs.
  • ROV remote operated vehicle
  • FIG. 1 illustrates one of many embodiments of a spar 100 in a deep water pit 102 and utilizing certain aspects of the present inventions.
  • Spar 100 can include a hull 104, such as a hard tank.
  • Hull 104 can be made from any material required by a particular application and can preferably be formed from steel.
  • Spar 100 can further include strake 106 on hull 104 for vortex breaking.
  • Strake 106 can include any number of sections and any number of components, as will be further described below. Strake 106 can preferably be formed from steel, but can be made from any material in accordance with a particular application.
  • Strake 106 can be coupled to hull 104 in any manner, such as, for example, by welding, bolts, hinges, or other couplers, separately or in combination, as will be understood by one of ordinary skill in the art. Also, strake 106 can be fixed in one position, which may be any position on any location of hull 104, or strake 106 can be dynamic, such as foldable, moveable, or otherwise. In at least one embodiment, which is but one of many, strake 106 can, but need not, be coupled along the longitudinal outside surface of hull 104, such as in a helical fashion. One or more portions of strake 106 can be coupled, for example, in a fixed manner to hull 104 at one or more locations required by a particular application.
  • FIG. 1 shows strake 106 coupled along certain portions of the outside surface of hull 104, wherein strake 106 is absent from certain other portions of hull 104, such as the belly side 108 of spar 100.
  • belly side 108 refers to the area of hull 104 that may face the ground during construction or transport.
  • belly side 108 may also require strake 106 be coupled thereto in accordance with a particular application.
  • strake 106 can be coupled to the belly side 108 of spar 100 in the preparation position shown in FIG. 1 , the time and expense of underwater fabrication can be avoided by one having the benefits of this disclosure.
  • the costs associated with fabrication at sea such as, for example, at or hear the location of operations of a particular embodiment, can be reduced or eliminated, as will be further described below.
  • FIG. 2 illustrates one of many embodiments of spar 100 in a working position in a deep water pit 102 and utilizing certain aspects of the present inventions.
  • Spar 100 may be rotated, such as while floating in deep water pit 102, into one or more working positions, such as that position shown in FIG. 2 .
  • spar 100 may be rotated so that belly side 108 is above water line 110, which can allow access to belly side 108, such as for coupling strake 106 thereto or otherwise preparing spar 100 for transport or operations in accordance with a particular application.
  • FIG. 3 illustrates one of many embodiments of a spar 100 having folded belly strakes and utilizing certain aspects of the present inventions.
  • spar 100 may be rotated in tank 102 to allow access to belly side 108 for working or constructing thereon.
  • strake 106 and folding strake 302 can be coupled to hull 104 while spar 100 is in the working position. While the working position is shown in FIGS. 2 and 3 to include belly portion facing substantially straight up, the working position may be canted or tilted in any direction in accordance with a particular application.
  • the rightmost figure in FIG. 3 shows strake 106, which is shown to be, but need not be, fixed strake, as well as folding strake 302.
  • Folding strake 302 can include any number of components required by a particular application and can include one or more panels 304 and one or more support frames 306.
  • the present inventions can allow both the folded support frames 306 and folded strake panels 302 to be unfolded in the deep water pit, such as to perform SITs.
  • the support frames 306 are formed or fitted for the strake panels 302, which can include installing bolts on the support frame, the strake supports and panels can be, for example, folded to and tied to the hard tank with temporary sea fastening.
  • FIG. 4 illustrates one of many embodiments of a spar 100 having folded belly strake 302 in a towing position and utilizing certain aspects of the present inventions.
  • spar 100 can be rotated to a transport or towing position, such as the position shown in FIG. 4 .
  • folding strake 302, or one or more components thereof can be fitted to spar 100 in the working position and removed before transport, such as to be reinstalled once spar 100 reaches its final or operations location.
  • Folding strake 302 can have any number of folded or unfolded positions required by a particular application, and may preferably include a folded position for towing.
  • folding strake 302 can be temporarily coupled in a folded position relative to the fixed strake 106 or the outer surface of hull 104 so that spar 100 can be towed, for example, through a relatively shallow draft 402, such as a draft 402 having a floor 404 that the fixed strake 106 would drag against if spar 100 were to be towed in a position other than belly side 108 down.
  • folding strake 302 can remain in one of many folded positions throughout transport, which may reduce or eliminate the time and costs of dry towing, such as using a HLV.
  • FIG. 5 illustrates one of many embodiments of an upended spar 100 having folded belly strakes 302 and utilizing certain aspects of the present inventions.
  • spar 100 Once spar 100 has been transported or towed to a particular location, such as the location for operations required by a particular application, spar 100 may be upended, or turned such that its longitudinal axis is perpendicular, or substantially perpendicular, to waterline 110. While folding strake 302 is shown in FIG. 5 to remain under water when spar 100 is upended, folding strake 302 need not. Folding strake 302 may be above water, in whole or in part, and may be coupled at one or more locations along the length of hull 104.
  • FIG. 6 illustrates one of many embodiments of spar 100 having unfolded strake support frames 306 and utilizing certain aspects of the present inventions.
  • FIG. 7 illustrates one of many embodiments of a spar hull having unfolded strake panels and utilizing certain aspects of the present inventions.
  • FIGS. 6 and 7 will be described in conjunction with one another.
  • folding strake 302 can be unfolded and coupled into a working position for operations, as required by a particular application.
  • one or more strake panels 304 and/or support frames 306 can be unfolded, such as by hinges, and can include welding, bolts, nuts, or other coupling devices and methods as will be understood by one of ordinary skill in the art.
  • support frames 306 can, but need not, be unfolded first, followed by strake panels 304.
  • Panels 304 can, but need not, be coupled to frames 306, hull 104, or other components of spar 100, separately or in combination.
  • one or more panels 304 or frames 306 can be coupled to the fixed strake 106, separately or in combination with other components.
  • Any number of panels 304 or frames 306 can be coupled to spar 100, including one large frame 306 or one large panel 304.
  • each panel 304 or frame 306 can be separate, or formed separately and coupled together, as required by a particular application.
  • Folding strake 302 can be coupled in any unfolded position and, while the coupling can occur while spar 100 is in the upright or upended position, it need not, and may occur while spar 100 is in the towing or horizontal position (see, e.g., FIG. 4 ). Also, the unfolding, positioning, or coupling of strake 302 can be carried out in any manner required by a particular application, such as, for example, by hand, divers or, as another example, by ROVs.
  • FIG. 8A illustrates one of many embodiments of a spar having unfolded belly strakes and utilizing certain aspects of the present inventions.
  • FIG. 8B illustrates an enlarged view of the embodiment shown in FIG. 8A and utilizing certain aspects of the present inventions.
  • FIG. 8C illustrates an end view of the embodiment shown in FIGS. 8A-8B and utilizing certain aspects of the present inventions.
  • the spar 100 can have a strake 106 that is relatively fixed in position and a folding strake 302 that typically will be disposed on the belly side 108 described above.
  • the folding strake 302 includes one or more folding panels 304 that are hingeably coupled to one or more fixed frames 306.
  • the one or more frames 306 are generally fixedly coupled to the hull 104, and the folding panels can be folded and unfolded relative to the frames.
  • the frames 306 can form a fixed strake surface that in conjunction with the strake panels deployed in an unfolded position collectively form a combined strake surface along the hull 104. While the illustrated embodiment shows two folding panels with two fixed frames, the number of folding panels can vary from one to many and the illustration is only exemplary.
  • the folding strake 302 includes a first panel 304a coupled to a first frame 306A, and a second panel 304B coupled to a second frame 306B.
  • the frames 306A, 306B can be fixed coupled to the hull 104.
  • the panel 304A, 304B can collectively be referred to as panel 304 herein, and frames 306A, 306B can collectively before referred to as frame 306.
  • the panel 304A can fold in one direction and the panel 304B can fold in a different, such as opposite, direction.
  • the panel 304A can fold upward in the orientation shown in FIG. 8A and the panel 304B can fold downward in the orientation shown in FIG. 8A .
  • one or more hinges 308A-308D can be used.
  • the hinge 308A and the hinge 308B can rotatably couple the panel 304A to the frame 306A.
  • the hinge 308C shown below in FIG. 9A , but hidden in view of the FIG. 8B
  • the hinge 308D can rotatably couple the panel 304B to the frame 306B.
  • the panels When the panels are in an unfolded deployed state for functioning as a strake surface, the panels can be coupled together at an interface 310 through one or more couplers 316A, 316B (collectively referred to as coupler 316), as detailed below.
  • FIG. 9A illustrates an enlarged view of the embodiment shown in FIGS. 8A-8C with the strake panels folded and utilizing certain aspects of the present inventions.
  • FIG. 9B illustrates an end view of the embodiment shown in FIG. 9A with the strake panels folded and utilizing certain aspects of the present inventions.
  • FIG. 9C illustrates an enlarged view of the embodiment shown in FIG. 9A at an interface between the strake panels with the strake panels being supported by hinges in a folded position and utilizing certain aspects of the present inventions.
  • the figures will be described in conjunction with each other.
  • the panel 304A can be rotated to a folded position, such as upward relative to the orientation of the assembly illustrated in FIG. 9A .
  • the panel 304B can be rotated downwardly in the orientation shown in FIG. 9A .
  • the hinges 308A, 308B can rotatably support the panel 304A to the frame 306A.
  • the hinges 308C, 308D can rotatably support the panel 304B to the frame 306B. While the panels are shown rotated in opposite directions, it is to be understood that in other embodiments, the panels can be rotated in the same direction, subpanels of such panels can be rotated in various directions, and other arrangements so that the panels can be rotated to reduce the strake profile on the hull 104 as described above and further illustrated in FIG. 9B .
  • FIG. 10A illustrates one of many embodiments of a hinge in a folded position used with a folding strake panel and utilizing certain aspects of the present inventions.
  • FIG. 10B illustrates the hinge embodiment shown in FIG. 10A in an unfolded position used with the folding strake panel and utilizing certain aspects of the present inventions.
  • the figures will be described in conjunction with each other.
  • the hinge 308A is illustrative of one of many embodiments that can be used to rotatably couple the panel 304A to the frame 306A.
  • the hinges 30BB-308D can, but need not, be similarly constructed.
  • the hinge 308A includes a first portion 318 that is fixedly coupled to the frame 306A.
  • the hinge further includes a second portion 320 that is fixedly coupled to the panel 304A.
  • the second portion 320 is rotatably coupled with the first portion 318 by the pivot 322 and can rotate about the pivot 322 relative to the first portion 318.
  • the panel can be retained in the folded position by retaining the second portion 320 with a fastener 332 that engages with the first portion 318.
  • the fastener 332 can be inserted through an opening 334, shown in FIG. 10B , so that the second portion 320 is locked in a folded position relative to the first portion 318.
  • a receiver 336 can also be used to help the fastener 332 maintain the folded position of the panel 304A.
  • the fastener 332 can be removed from engaging the opening 334 of the second portion 320 to allow the second portion 320 to rotate about the pivot 322.
  • a face plate 324 is coupled to the first portion 318 and a second face plate 326 is coupled to the second portion 320 of the hinge 308A.
  • the face plates can be used to restrict rotation in an unfolded state as described below.
  • a pair of face plates 324, 326 can contact each other to assist in restricting further rotation of the panel 304A.
  • the hinge 308A can be locked in the deployed, unfolded position by one or more fasteners 328.
  • the fastener 328 can be inserted from the second portion 320 to the first portion 318 of the hinge 308A.
  • a receiver 330 can be used to further secure and provide structural support for the fastener 328 to engage the first portion 318.
  • the fastener can be threaded so that by turning the fastener 328, such as with an ROV, the fastener 328 can engage a suitably threaded receiver 330 to lock the second portion 320 to the first portion 318 of the hinge 308A and secure the panel 304A in the unfolded position.
  • FIG. 10C illustrates another of many embodiments of a hinge in an unfolded position used with a folding strake panel and utilizing certain aspects of the present inventions.
  • a first portion 318 of a hinge 308 is coupled to a frame 306 and a second portion 320 of the hinge is coupled to a panel 304.
  • the second portion 320 rotates about a pivot 322 relative to the first portion 318.
  • the face plates 324, 326 can, but need not, be used to restrict a maximum movement of the hinge's first and second portions when the panel 304 is in a deployed, unfolded position.
  • the hinge 308 of FIG. 10C does not include components to lock the hinge in an open or closed position corresponding to the folded and unfolded orientations of the panel 304.
  • This hinge design can be used alone or in combination with other hinge designs. In some embodiments, it may be useful to have such hinges at different locations between the panel 304 and the adjacent frame 306 to assist in supporting the components while at the same time using hinges such as those shown in FIGS. 10A-10B to help secure the panels in one or more positions.
  • FIG. 11A illustrates one of many embodiments of a coupler used to couple adjacent folding strake panels at an interface between the panels and utilizing certain aspects of the present inventions.
  • FIG. 11B illustrates an enlarged view of the coupler embodiment shown in FIG. 11A in an uncoupled state and utilizing certain aspects of the present inventions.
  • the figures will be described in conjunction with each other.
  • the panel 304A can be coupled to the panel 304B when the panels are in a deployed, unfolded position.
  • the hinge 308B is shown in FIG. 8B as adjacent the interface 310 between the panels 304A, 304B.
  • the hinge 308B is shown in a deployed, rotated position for unfolding the panel 304A.
  • the hinges that couple the panel 304B to the frame 306B are also rotated to allow the panel 304B to be in an unfolded position.
  • One or more couplers 316 can be used to couple the panels 304A, 304B together.
  • a first coupler 316A can be used to couple together an outward portion of the panels 304A, 304B that is distal from the hull 104
  • a second coupler 316B can be used couple together an inward portion of the panels that is proximal to the hull.
  • the number of couplers can vary from one to many and the illustrated number is only exemplary.
  • couplers are shown engaged with the panels 304A and 304B coupled together.
  • the portions of the coupler are shown uncoupled, and thereby the panels 304A, 304B are also uncoupled. More specifically, as shown in FIG.
  • the coupler 316B can include a first portion 340 that is coupled to the panel 304A and a second portion 342 that is coupled to the panel 304B.
  • a latch 344 can be rotatably coupled to the first portion 340 about a pivot 346 and can be held in such position by a fastener 348.
  • the second portion 342 of the coupler 316 acts as a receiver and can receive the latch 344, when the latch 344 is rotated toward the second portion 342.
  • a fastener 350 can be inserted through an opening 352 formed in the latch 344, to secure the latch with the second portion 342. The opening is illustrated in FIG. 11B and a secured latch is illustrated in FIG. 11A .
  • FIG. 12 illustrates one of many embodiments of a spar 100 in an installed position and utilizing certain aspects of the present inventions.
  • spar 100 can be positioned for operations, such as, for example, in the final or operations position shown in FIG. 12 .
  • moor lines 802 can be coupled to hull 104 or other portions of spar 100, such as to anchor spar 100 to the sea floor.
  • one or more decks 804 or cranes 806 can be coupled to spar 100, separately or in combination with any other drilling or operations equipment required by a particular application. While the contour of folding strake 302 is shown in FIG.
  • strakes 106, 302 are shown in FIG. 12 to be coupled in a helical fashion about spar 100, it need not be, and can take any form or fashion.
  • strake can be folding strake or the folding strake can be folded or unfolded automatically, such as by pistons.
  • the various methods and embodiments of the spar can be included in combination with each other to produce variations of the disclosed methods and embodiments. Discussion of singular elements can include plural elements and vice-versa.

Claims (15)

  1. Coque de spar (104) pour bâtiment flottant, comprenant :
    une citerne rigide comportant une surface externe, ladite surface externe présentant une partie ventre ;
    une virure fixe (106) accouplée à une première partie de la surface externe de la citerne ; caractérisée en ce qu'elle comprend :
    une virure pliante (302) accouplée à une seconde partie de la surface externe de la citerne différente de la première partie, la virure pliante présentant un ou plusieurs panneaux de virure (304) conçus pour être pliés sélectivement vers la surface externe de la citerne.
  2. Coque de spar (104) selon la revendication 1, dans laquelle la première partie ne comprend pas la partie ventre et la seconde partie comprend la partie ventre.
  3. Coque de spar (104) selon la revendication 1, dans laquelle le ou les panneaux de virure (304) sont accouplés de façon rotative à la seconde partie de la surface externe.
  4. Coque de spar (104) selon la revendication 1, comprenant en outre une structure de blocage apte à bloquer le ou les panneaux de virure (304) dans une ou plusieurs positions pliées ou dépliées par rapport à la surface externe de la citerne.
  5. Coque de spar (104) selon la revendication 1, comprenant en outre un cadre de support (306) conçu pour être accouplé au côté du spar et présentant une position dépliée et au moins une position pliée et conçu pour soutenir le panneau de virure (304) lorsque le cadre et le panneau sont dans des positions dépliées.
  6. Coque de spar (104) selon la revendication 1, comprenant en outre un cadre de support (306) accouplé de façon fixe à la surface externe et au moins un des panneaux de virure accouplé de façon rotative au cadre de support.
  7. Coque de spar (104) selon la revendication 1, comprenant en outre un cadre de support (306) accouplé de façon fixe à la surface externe et formant une partie de la virure pliante et au moins un des panneaux de virure accouplé de façon rotative au cadre de support, le cadre de support et le panneau de virure pliante formant une surface de virure lorsque le panneau de virure pliante est déployé dans une position dépliée.
  8. Coque de spar (104) selon la revendication 1, dans laquelle la virure pliante (302) comprend au moins deux cadres de support accouplés de façon fixe et au moins deux panneaux de virure accouplés de façon rotative aux cadres de support, et un premier panneau de virure étant conçu pour se plier dans une première direction le long de la surface externe de la citerne et un second panneau de virure étant conçu pour se plier dans une seconde direction différente de la première direction.
  9. Coque de spar (104) selon la revendication 1, comprenant en outre un organe d'accouplement ayant une première partie attachée à un premier panneau de virure et une seconde partie attachée à un second panneau de virure, l'organe d'accouplement étant conçu pour accoupler les premier et second panneaux de virure l'un à l'autre lorsque les panneaux sont en position dépliée.
  10. Procédé d'utilisation d'une coque de spar (104) pour des exploitations pétrolières et gazières au large, comprenant :
    la fourniture d'une coque de spar (104) présentant une virure de ventre, au moins une partie de la virure de ventre présentant au moins une position pliée et une position dépliée ;
    la fixation de la virure en position pliée ;
    le positionnement de la coque de spar (104) au large dans une position de transport ;
    le redressement de la coque de spar (104) ;
    le dépliage de la virure ;
    la fixation de la virure en position dépliée ; et
    le positionnement de la coque de spar (104) en position installée.
  11. Procédé selon la revendication 10, comprenant en outre l'installation de la virure de ventre sur la coque de spar (104), comprenant :
    la rotation de la coque de spar (104) de sorte que le côté ventre de la coque de spar se trouve dans une première position fonctionnelle ;
    l'accouplement d'au moins une virure pliante (302) de la virure de ventre au côté ventre de la coque de spar.
  12. Procédé selon la revendication 10, comprenant en outre le transport de la coque de spar (104) jusqu'à un puits de travail avant la rotation du spar jusqu'à la première position fonctionnelle et dans lequel la rotation de la coque de spar (104) jusqu'à une seconde position comprend la rotation de la coque de spar (104) jusqu'à une position de remorquage en flottaison.
  13. Procédé selon la revendication 10, dans lequel la virure de ventre comprend un ou plusieurs cadres de support de virure (306) et un ou plusieurs panneaux de virure (304) et comprenant en outre :
    l'installation des cadres de support et des panneaux de virure sur la coque de spar (104),
    l'enlèvement temporaire d'un ou plusieurs des cadres de support ou des panneaux pour le transport jusqu'à un site d'exploitation.
  14. Procédé selon la revendication 10, dans lequel la fixation de la virure en position pliée comprend :
    le pliage d'un premier panneau de virure (304) dans une première direction le long de la surface externe de la citerne ; et
    le pliage d'un second panneau de virure (304) dans une seconde direction différente de la première direction.
  15. Procédé selon la revendication 10, comprenant en outre l'accouplement d'un premier panneau de virure (304) de la virure de ventre à un second panneau de virure (304) de la virure de ventre au niveau de la jonction entre les panneaux de virure lorsque les panneaux de virure sont dépliés.
EP10703570.1A 2009-02-04 2010-01-28 Conception d'un element anti-vibratoire pour coque de plateforme spar et procede d'installation Active EP2393707B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/365,811 US20100192829A1 (en) 2009-02-04 2009-02-04 Spar hull belly strake design and installation method
PCT/US2010/022364 WO2010090942A2 (fr) 2009-02-04 2010-01-28 Conception de virure de ventre de coque de spar et procédé d'installation

Publications (2)

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EP2393707A2 EP2393707A2 (fr) 2011-12-14
EP2393707B1 true EP2393707B1 (fr) 2013-07-31

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US (1) US20100192829A1 (fr)
EP (1) EP2393707B1 (fr)
MY (1) MY165996A (fr)
WO (1) WO2010090942A2 (fr)

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US8696291B2 (en) * 2010-12-14 2014-04-15 J. Ray Mcdermott, S.A. Spar hull load out method
JP2016032948A (ja) * 2012-12-26 2016-03-10 独立行政法人石油天然ガス・金属鉱物資源機構 浮体構造物
WO2019222825A1 (fr) * 2018-05-24 2019-11-28 Horton Do Brasil Tecnologia Offshore, Ltda. Structure d'espar offshore dotée d'amortisseurs hydrodynamiques et procédés de déploiement et d'installation de ceux-ci
GB2593519B (en) * 2020-03-26 2022-05-18 Equinor Energy As Offshore spar platform

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FR1510937A (fr) * 1966-11-30 1968-01-26 Automatisme Cie Gle Perfectionnement aux plateformes flottantes
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FR2553371B1 (fr) * 1983-10-17 1986-01-17 Arles Const Metalliques Procede de realisation d'un systeme modulaire utilisable notamment au large des cotes
US4683832A (en) * 1984-07-30 1987-08-04 Dysarz Edward D Device and method to set and salvage structures
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Publication number Publication date
MY165996A (en) 2018-05-21
EP2393707A2 (fr) 2011-12-14
WO2010090942A2 (fr) 2010-08-12
WO2010090942A3 (fr) 2010-12-16
US20100192829A1 (en) 2010-08-05

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