WO2020008224A1 - Carénages pour structures aquatiques - Google Patents

Carénages pour structures aquatiques Download PDF

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Publication number
WO2020008224A1
WO2020008224A1 PCT/IB2018/000892 IB2018000892W WO2020008224A1 WO 2020008224 A1 WO2020008224 A1 WO 2020008224A1 IB 2018000892 W IB2018000892 W IB 2018000892W WO 2020008224 A1 WO2020008224 A1 WO 2020008224A1
Authority
WO
WIPO (PCT)
Prior art keywords
fairing
aquatic structure
aquatic
tarpaulin
interior space
Prior art date
Application number
PCT/IB2018/000892
Other languages
English (en)
Inventor
Clément BOIREAU
Original Assignee
Total Sa
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 Total Sa filed Critical Total Sa
Priority to PCT/IB2018/000892 priority Critical patent/WO2020008224A1/fr
Priority to ARP190101912A priority patent/AR115711A1/es
Priority to PCT/EP2019/068118 priority patent/WO2020008042A1/fr
Publication of WO2020008224A1 publication Critical patent/WO2020008224A1/fr

Links

Classifications

    • 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
    • B63B21/56—Towing or pushing equipment
    • B63B21/66—Equipment specially adapted for towing underwater objects or vessels, e.g. fairings for tow-cables
    • B63B21/663—Fairings
    • 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
    • B63B21/502—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers by means of tension legs
    • B63B2021/504—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers by means of tension legs comprising suppressors for vortex induced vibrations

Definitions

  • the present invention relates to new fairings for aquatic structures and to aquatic structures comprising such new fairings.
  • Marine pipes and cables and structures which extend from a ship or platform on the surface of the ocean to the ocean floor, such as production risers, as well as many other structures in contact with water, may be subjected to strong water currents. These currents lead to the creation of vortex-induced-vibrations and high drag forces in the aquatic structures which destabilize them.
  • current direction may vary according to water depth. Water temperature may also broadly vary, for example from 30°C to 0°C.
  • aquatic structures may be fitted with fairings having specific shapes, which makes it possible to canalize the water flow around the pipes or cables.
  • Fairings may be used preferably at a depth of from 0 to 6000 m but could even go deeper.
  • US 4,398,487 describes a fairing having a rigid body made of plastic, optionally reinforced with fiberglass, of metal or of a multilayered material consisting of a syntactic foam core sandwiched between fiberglass outer coverings.
  • Rigid fairings with a short profile, exhibit poor hydrodynamic qualities, such as a relatively high drag coefficient, and have insufficient efficiency in reducing vortex-induced-vibrations and/or drag forces when water currents are strong.
  • improved fairings for aquatic structures having high hydrodynamic performance without being cumbersome before their installation in the operating environment, e.g. the ocean or a river.
  • the fairing comprises a rigid structure configured to be rotatably disposed on the aquatic structure, the tarpaulin being attached to the rigid structure.
  • the rigid structure is in the shape of a tube.
  • the tarpaulin is attached to the rigid structure via bolts, snap buttons, Velcro straps, zips, grooves, tumblers, by heat-sealing, heat- bonding or a combination thereof.
  • the tarpaulin is configured to be directly attached to the aquatic structure, the tarpaulin being preferably further configured to be rotatably disposed on the aquatic structure.
  • the fairing is configured to rotate around the aquatic structure under the effect of flow when it is in water.
  • the tarpaulin is made of polyamide, polyester, polytetrafluoroethylene, polypropylene, polyethylene, oilcloth, such as a cotton or linen cloth with a coating of boiled linseed oil, or a combination thereof.
  • the aperture comprises a sieve.
  • the transverse cross section of the fairing has one substantially pointed extremity when the interior space is filled with water.
  • the interior space is divided into several cells by internal partitions.
  • the fairing comprises at least two fairing elements placed one after the other according to an axis, each fairing element comprising a flexible waterproof tarpaulin and an aperture.
  • each fairing element is independently configured to be rotatably disposed on the aquatic structure.
  • the fairing surrounds the aquatic structure.
  • the aquatic structure comprises at least one translation stop for preventing translation of the fairing along the aquatic structure.
  • the translation stop is a flange or a clamp or a collar or a sleeve or a clip fixed to the aquatic structure.
  • the fairing is attached to another, rigid, underlying fairing.
  • the aquatic structure has a main direction, and the maximum dimension of the fairing orthogonal to the main direction of the aquatic structure, when the interior space of the tarpaulin is inflated, is at least twice the diameter of the aquatic structure orthogonal to the main direction.
  • the maximum dimension of the fairing orthogonal to the main direction of the aquatic structure, when the interior space of the tarpaulin is inflated, is from three times to ten times the diameter of the aquatic structure orthogonal to the main direction.
  • the maximum dimension of the fairing orthogonal to the main direction of the aquatic structure, when the interior space of the tarpaulin is inflated is from six times to eight times, preferably is about seven times the diameter of the aquatic structure orthogonal to the main direction.
  • the aquatic structure is chosen from the group consisting of drilling risers, production risers, umbilicals, flexibles pipes, flow lines or control lines going from the water surface to the sea floor, anchoring structures and fixed structures, such as girders.
  • the fairing is attached to the aquatic structure on a ship or offshore platform or onshore.
  • the aquatic structure in the abovementioned use, is selected from the group consisting of drilling risers, production risers, umbilicals, flexibles pipes, flow lines or control lines going from the water surface to the sea floor, anchoring structures and fixed structures, such as girders.
  • the present invention enables to meet the abovementioned need.
  • the invention provides a fairing for an aquatic structure exhibiting high hydrodynamic performances, which makes it possible to efficiently reduce vortex- induced-vibrations and/or drag forces, while having a reduced size before its installation.
  • a flexible tarpaulin which defines an interior space capable of inflating under water pressure and by the presence of an aperture in the fairing so as to put the interior space into fluid communication with the environment surrounding the fairing, that is to say the water in which the aquatic structure is immersed.
  • the interior space defined by the flexible tarpaulin may be deflated and the tarpaulin part of the fairing may be, for example, folded down to reduce the volume of the fairing.
  • water flows through the aperture of the fairing and fills its interior space.
  • the interior space inflates under the pressure of said water, resulting in an increase in volume of the fairing and an increase in the extension of the fairing away from the aquatic structure (such as a cable or pipe) that it equips.
  • Figure 1 is a schematic view of a transverse cross section of an example of fairing according to the invention.
  • Figure 2 is a schematic longitudinal view of an example of fairing according to the invention.
  • Figure 3 is a schematic view of a transverse cross section of another example of fairing according to the invention.
  • a fairing 1 according to the invention is intended to be used for a marine pipe or cable, or for any other aquatic structure 4.
  • aquatic structures any mechanical structure having at least a part of it immersed in water.
  • the aquatic structures generally have an overall elongated shape. This makes it possible to define a main (longitudinal) direction of an aquatic structure.
  • the aquatic structure has a cross section in a plane orthogonal to the main direction of the aquatic structure which is circular.
  • the aquatic structure of the invention may be placed in e.g. a lake or a river. More preferably, it is placed in a sea or ocean.
  • the main direction of the aquatic structure may extend from a shore to off-shore, for example substantially horizontally; or it may preferably extend substantially vertically from the surface of the water; or it may extend, for example from the surface of the water, at any angle between the horizontal and the vertical.
  • the fairing 1 according to the invention comprises a flexible, waterproof tarpaulin 2 which is configured to define an interior space 8.
  • tarpaulin By“flexible tarpaulin” is meant that the tarpaulin can be deformed under water pressure.
  • the interior space 8 is able to inflate when filled with water.
  • the tarpaulin 2 may be made of any material with the proviso that it remains flexible and waterproof.
  • the material of which the tarpaulin is made is a biocide material, in particular a bactericide material, and/or an abrasion- resistant material and/or a salt-resistant material. It may be a woven or a non- woven material, or a plastic material produced by molding, extrusion or the like.
  • the tarpaulin may be made of polyamide, polyester, polytetrafluoroethylene, polypropylene, polyethylene, or a combination thereof.
  • the tarpaulin may also contain fibers, such as textile fibers, carbon fibers or metal fibers, or any fibers capable of increasing resistance of the tarpaulin, and may be treated, for example coated with any known coating material to make it water-impervious.
  • the tarpaulin may be made of or comprise an oilcloth (such as a cotton or linen cloth with an oil coating, such as a boiled linseed oil coating).
  • the tarpaulin may be made of a biodegradable material. This is particularly advantageous when the fairing is needed only for a certain period, for example when the fairing is needed only for the laying of the aquatic structure: thus, there is no need to withdraw the fairing which is degraded and removed from the aquatic structure by itself over time.
  • the tarpaulin may be made of a single material or of a plurality of different materials, such as the abovementioned materials, for example arranged in successive layers.
  • the tarpaulin may also comprise a reinforcing structure, such as a braided structure, for instance a metallic braided structure.
  • a reinforcing structure such as a braided structure, for instance a metallic braided structure.
  • the tarpaulin 2 may be, for example, sewn and/or heat-sealed.
  • the fairing according to the invention also comprises an aperture 3 configured to put the interior space 8 into fluid communication with the environment.
  • environment is meant the medium in which the fairing 1 is placed, for example, ocean water.
  • fluid communication is meant that any fluid from the environment is able to reach the interior space 8, through the aperture 3.
  • water in which the pipe 4 is immersed flows through the aperture 3 and fills the interior space 8. Under the pressure of said water, the interior space 8 inflates to confer its operational shape to the fairing 1 .
  • the aperture 3 may comprise a sieve or grid.
  • the aperture consists of a sieve.
  • Such a sieve makes possible to prevent objects exceeding a certain size from entering into the interior space 8.
  • the sieve may be made of any material compatible with use in the ocean or more generally in water.
  • the sieve may be made of stainless steel.
  • the aperture 3 may be configured such that water is able to flow through the aperture 3 in only one direction.
  • the aperture 3 may comprise a check valve.
  • the fairing 1 may comprise only a single aperture 3 putting the interior space 8 into fluid communication with the environment.
  • the fairing 1 may comprises several apertures 3. Such an embodiment is shown in Figure 3. Each of these apertures 3 may be, for example, a sieve or a check valve.
  • the fairing 1 may further comprise a pressure relief valve 10. This embodiment is particularly advantageous when the fairing 1 may be subjected to strong current, in order to prevent any damage to the fairing.
  • the fairing 1 may comprise a rigid structure 5.
  • rigid structure is meant a structure which cannot be deformed by the pressure of water naturally existing in oceans, seas, rivers or the like.
  • the rigid structure 5 may comprise, or be made of, any material compatible with the materials with which the rigid structure 5 is intended to be in contact, such as the materials of the aquatic structure. Examples of suitable materials are high-density polyethylene (FIDPE), polyurethane, polytetrafluoroethylene, any metal or alloy such as steel , wood, or a combination thereof.
  • FIDPE high-density polyethylene
  • polyurethane polyurethane
  • polytetrafluoroethylene any metal or alloy such as steel , wood, or a combination thereof.
  • the rigid structure 5 is in the shape of a tube.
  • this rigid tube is intended to surround the pipe 4.
  • the rigid structure 5 is preferably free to rotate with respect to the pipe 4. This enables the fairing 1 to weathervane around the pipe 4 (about the main direction thereof), under the effect of flow. Therefore, a change in the direction of the current will make the fairing 1 weathervane around the pipe 4.
  • the freedom in rotation may be conferred by means of ball bearings or bearings made of materials having a low friction coefficient with the pipe’s materials.
  • the rigid and free to rotate structure 5 is directly in contact with the pipe 4 and the rotation is performed by sliding of the rigid structure 5 with respect to the pipe 4.
  • the rigid structure 5 is able to allow water to flow to the interior space 8 of the tarpaulin 2 through the rigid structure 5.
  • the rigid structure 5 may have grooves, holes or any system to allow water from the environment to flow to the interior space 8 of the tarpaulin 2.
  • the tarpaulin 2 may comprise attachment elements for attaching the tarpaulin 3 onto the rigid structure 5. Suitable attachment elements are bolts, snap buttons, Velcro straps, zip or a combination thereof. The tarpaulin 2 may also be attached onto the rigid structure 5 by heat-sealing and/or heat-bonding. The tarpaulin may also be attached through a tumbler or a groove.
  • the attachment elements are preferably watertight.
  • the tarpaulin 2 is directly attached onto the pipe 4, i.e. no intermediate structure is provided between the tarpaulin 2 and the pipe 4.
  • the tarpaulin 2 may be attached onto the pipe 4 by means of bolts, snap buttons, Velcro straps, tumblers, grooves, heat-sealing, heat-bonding or a combination thereof.
  • the tarpaulin 2 is free to rotate with respect to the pipe 4 (about the main direction thereof).
  • the fairing 1 is advantageously able to rotate (about the main direction of the pipe 4) under the effect of flow when it is in its operating environment, i.e. water.
  • the (or one) aperture 3 is located in the fairing 1 such as to face, or substantially face, the current.
  • the fairing 1 is able to rotate (about the main direction of the pipe 4) under the effect of flow when it is in water such that the (or one) aperture 3 always faces, or substantially faces the current.
  • the fairing 1 is preferably configured so as to orient itself in water depending on the direction of the current so that maximum water pressure on the fairing 1 is exerted at the position of the (or one) aperture 3.
  • the (or one) aperture is not located in the fairing 1 such as to face, or substantially face, the current, this aperture is preferably located in the fairing such as not to face any depression area 1 1 which may form next to the pipe 4 due to the position of the current streamlines 12 around the pipe 4.
  • the depression areas are caused by water flow velocity, when the water flow velocity is higher than the water current velocity. Depression areas are complex to evaluate and depend on the water velocity and the fairing geometry.
  • the fairing 1 may also comprise a water intake structure such as but not limited to a NACA inlet to overcome the depression area and to fill the interior space 8 of the fairing 1 .
  • the transverse cross section of the fairing 1 may have an elongated shape, with one end conforming to the pipe 4 or rigid structure 5 (such as a partly circular part), and the opposite end extending away from the pipe 4.
  • the opposite end extends away from the pipe in a substantially pointed manner.
  • the opposite end may have a substantially flat shape, or curved shape (for instance a concave shape or a convex shape or a shape having both convex and concave portions) or any other suitable shape.
  • the aperture 3 is located in the part conforming to the pipe 4.
  • the shape of the partly circular part is induced by the tubular rigid structure 5.
  • the tarpaulin 2 surrounds at least part or all of the rigid structure 5.
  • the interior space 8 may comprise internal partitions which divide it into several cells. These internal partitions make it possible to maintain a predefined shape for the interior space 8 when the tarpaulin 2 is inflated.
  • the internal partitions are made of the same materials as the tarpaulin 2.
  • Each cell contains at least one aperture to enable water to fill it, the apertures being preferably in the internal partitions, with the proviso that the fairing 1 contains at least one aperture 3 directly open onto the environment as described above. Therefore, all cells are in fluid communication with the environment, directly or indirectly.
  • the pipe 4 equipped with the fairing 1 may comprise at least one translation stop for preventing the fairing 1 from moving along the pipe 4.
  • the stops may be flanges 7.
  • the stops may be clamps, collars, sleeves, or clips.
  • the flanges 7 (or the clamps or the collars, or the sleeves, or the clips) are fixed to the pipe 4.
  • the flanges (or the clamps or the collars, or the sleeves, or the clips) may be made of any metal or alloy such as steel, polymer material, for example rubber, such as synthetic rubber or natural rubber, or a combination thereof.
  • the at least one translation stop could be made of the structure material.
  • the at least one translation stop could be made incorporated on the aquatic structure 4 and in concrete.
  • the length L1 of the fairing 1 is preferably higher than or equal to twice the diameter L2 of the pipe 4.
  • length L1 of the fairing is meant the maximum extension of the fairing in operation, i.e. when the interior space 8 is filled with water.
  • diameter L2 of the pipe (or of the aquatic structure) 4" is meant the maximum dimension of the pipe (or aquatic structure) in a plane orthogonal to the main direction of the pipe (or aquatic structure).
  • the length L1 of the fairing is the longer dimension that is perpendicular to the axis of the pipe.
  • Length L1 may be from twice to 2.5 times the diameter L2, or from 2.5 times to 3 times the diameter L2, or from 3 times to 3.5 times the diameter L2, or from 3.5 times to 4 times the diameter L2, or from 4 times to 4.5 times the diameter L2, or from 4.5 times to 5 times the diameter L2, or from 5 times to 5.5 times the diameter L2, or from 5.5 times to 6 times the diameter L2, or from 6 times to 6.5 times the diameter L2, or from 6.5 times to 7 times the diameter L2, or from 7 times to 7.5 times the diameter L2, or from 7.5 times to 8 times the diameter L2, or from 8 times to 8.5 times the diameter L2, or from 8.5 times to 9 times the diameter L2, or from 9 times to 9.5 times the diameter L2, or from 9.5 times to 10 times the diameter L2, or from 10 times to 1 1 times the diameter L2, or from 1 1 times to 12 times the diameter L2, or from 12 times to 13
  • the fairing 1 may comprise at least two fairing elements 9.
  • a fairing 1 comprising two fairing elements 9 is shown in Figure 2.
  • the fairing elements 9 are preferably successively placed along the main direction of the pipe 4.
  • Each of the fairing elements 9 comprises a flexible waterproof tarpaulin 2 and an aperture 3 as described above and may comprise independently all the abovementioned features.
  • the fairing 1 comprises several fairing elements 9, the sentence that the fairing comprises“only a single aperture” must be understood as meaning that each of the fairing elements contains only a single aperture and the sentence that the fairing comprises“several apertures" must be understood as meaning that at least one fairing element comprises several apertures, and that in particular all of the fairing elements may comprise several apertures, where all the fairing elements may not have the same number of apertures.
  • the fairing elements 9 are each and independently free to rotate with respect to the pipe 4.
  • the fairing elements 9 are each and independently able to rotate under the effect of flow when they are in their operating environment, i.e. water.
  • each fairing element 9 is able to orient itself depending on the current direction to which it is subjected, which may reduce the shear effect in the fairing.
  • the fairing elements 9 may be completely independent from each other or may be tied to each other. When the fairing elements 9 are tied to each other, they are preferably able to move (preferably, in rotation) with respect to each other. For example, they may rotate with respect to each other by an angle a.
  • the fairing of the invention may be attached to another rigid fairing, such as a fairing of the prior art. This makes possible to extend the length of the rigid fairing and, consequently, to reduce the drag coefficient of the system comprising the pipe equipped with the fairings.
  • the pipe 4 equipped with the fairing 1 has a drag coefficient measured in situ lower than or equal to 1 , or lower than or equal to 0.9, or lower than or equal to 0.8, or lower than or equal to 0.7, or lower than or equal to 0.6, or lower than or equal to 0.5, or lower than or equal to 0.4, or lower than or equal to 0.3, or lower than or equal to 0.2, or lower than or equal to 0.1 .
  • the aquatic structure 4 may be chosen from the group consisting of, but not limited to, drilling risers, production risers, umbilicals, flexibles pipes, any flow lines or control lines going from the water surface to the sea floor, anchoring structures and fixed structures, such as girders.
  • the invention also relates to a method for installing a fairing 1 on an aquatic structure 4.
  • the method comprises the steps of:
  • the fairing 1 which is provided may be preassembled, or the constituting parts of the fairing may be provided, these parts being assembled when the fairing is attached to the aquatic structure.
  • the fairing 1 may comprise several fairing elements 9.
  • the fairing elements 9 may be each attached to the aquatic structure 4, one after the other.
  • the fairing may be continuous and made of one piece.
  • the fairing either continuous or comprising several fairing elements 9 tied to each other, may be provided wound on a drum or a reel. Then, the fairing may be reeled out and attached along the aquatic structure 4 (such as a riser or a pipeline).
  • the fairing 1 may be attached to the aquatic structure 4 just before the aquatic structure 4 is dropped into the water, or in an upstream stage, or when the aquatic structure 4 is already in its operating environment.
  • the fairing 1 may be attached to the aquatic structure 4 in an upstream stage and the aquatic structure 4, for example a cable (or any aquatic structure able to be wound), equipped with the fairing may be wound on a drum or reel, for example in order to be provided to the place where the aquatic structure is intended to be used.
  • the aquatic structure 4 equipped with the fairing 1 is“ready to use” and may be reeled out to be used.
  • the fairing 1 may be attached to the aquatic structure 4 on a ship or offshore platform or onshore.
  • the invention also relates to the use of a fairing 1 as disclosed above for reducing vortex-induced-vibrations and/or drag forces in an aquatic structure 4.
  • the aquatic structure 4 may be at a set position or may move through water.
  • the fairing 1 may be used for reducing vortex- induced-vibrations and/or drag forces in an aquatic structure 4 when said aquatic structure 4 is moved in water from a place to another place.
  • the fairing 1 may be used for reducing vortex-induced-vibrations and/or drag forces in an aquatic structure 4 (for example any aquatic structure that is part of a floating production platform) that is towed toward the position where it is intended to be used.
  • Fairings 1 may be used on towing equipment such as cables, dragging platforms... In some embodiments fairings 1 could be used to control buoyancy when the aquatic structure 4 is moved when immersed.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Earth Drilling (AREA)
  • Revetment (AREA)

Abstract

L'invention concerne un carénage destiné à une structure aquatique (4) et comprenant une bâche souple étanche à l'eau (2) conçue pour définir un espace intérieur (8) et une ouverture (3) conçue pour mettre ledit espace intérieur (8) en communication fluidique avec l'environnement, ledit espace intérieur étant conçu pour gonfler lorsqu'il est rempli d'eau. L'invention concerne également une structure aquatique (4) équipée d'un tel carénage, un procédé d'installation d'un tel carénage (1) sur une structure aquatique (4) et l'utilisation d'un tel carénage (1) pour réduire les vibrations induites par vortex et/ou les forces de traînée dans une structure aquatique (4).
PCT/IB2018/000892 2018-07-06 2018-07-06 Carénages pour structures aquatiques WO2020008224A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/IB2018/000892 WO2020008224A1 (fr) 2018-07-06 2018-07-06 Carénages pour structures aquatiques
ARP190101912A AR115711A1 (es) 2018-07-06 2019-07-05 Carenados para estructuras acuáticas
PCT/EP2019/068118 WO2020008042A1 (fr) 2018-07-06 2019-07-05 Carénages de structures aquatiques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2018/000892 WO2020008224A1 (fr) 2018-07-06 2018-07-06 Carénages pour structures aquatiques

Publications (1)

Publication Number Publication Date
WO2020008224A1 true WO2020008224A1 (fr) 2020-01-09

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PCT/IB2018/000892 WO2020008224A1 (fr) 2018-07-06 2018-07-06 Carénages pour structures aquatiques
PCT/EP2019/068118 WO2020008042A1 (fr) 2018-07-06 2019-07-05 Carénages de structures aquatiques

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/068118 WO2020008042A1 (fr) 2018-07-06 2019-07-05 Carénages de structures aquatiques

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AR (1) AR115711A1 (fr)
WO (2) WO2020008224A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4398487A (en) 1981-06-26 1983-08-16 Exxon Production Research Co. Fairing for elongated elements
US6048136A (en) 1996-07-19 2000-04-11 Shell Oil Company Vortex induced vibration protection for deepwater drilling risers
US6244204B1 (en) * 1998-11-03 2001-06-12 Odim Holding Asa Fairing for a towed cable
US6517289B1 (en) * 2000-09-28 2003-02-11 The United States Of America As Represented By The Secretary Of The Navy Inflatable vibration reducing fairing
WO2016124967A1 (fr) * 2015-02-02 2016-08-11 Cgg Services Sa Carénage de câble pouvant être rempli d'eau et procédé

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070003372A1 (en) * 2005-06-16 2007-01-04 Allen Donald W Systems and methods for reducing drag and/or vortex induced vibration

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4398487A (en) 1981-06-26 1983-08-16 Exxon Production Research Co. Fairing for elongated elements
US6048136A (en) 1996-07-19 2000-04-11 Shell Oil Company Vortex induced vibration protection for deepwater drilling risers
US6244204B1 (en) * 1998-11-03 2001-06-12 Odim Holding Asa Fairing for a towed cable
US6517289B1 (en) * 2000-09-28 2003-02-11 The United States Of America As Represented By The Secretary Of The Navy Inflatable vibration reducing fairing
WO2016124967A1 (fr) * 2015-02-02 2016-08-11 Cgg Services Sa Carénage de câble pouvant être rempli d'eau et procédé

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Publication number Publication date
AR115711A1 (es) 2021-02-17
WO2020008042A1 (fr) 2020-01-09

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