EP1972041A1 - High or medium voltage swivel - Google Patents

High or medium voltage swivel

Info

Publication number
EP1972041A1
EP1972041A1 EP05817894A EP05817894A EP1972041A1 EP 1972041 A1 EP1972041 A1 EP 1972041A1 EP 05817894 A EP05817894 A EP 05817894A EP 05817894 A EP05817894 A EP 05817894A EP 1972041 A1 EP1972041 A1 EP 1972041A1
Authority
EP
European Patent Office
Prior art keywords
swivel
conductors
conductor
medium voltage
annular
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.)
Granted
Application number
EP05817894A
Other languages
German (de)
French (fr)
Other versions
EP1972041B1 (en
Inventor
Stuart Longmire
René Perratone
Jack Pollack
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Single Buoy Moorings Inc
Original Assignee
Single Buoy Moorings Inc
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 Single Buoy Moorings Inc filed Critical Single Buoy Moorings Inc
Publication of EP1972041A1 publication Critical patent/EP1972041A1/en
Application granted granted Critical
Publication of EP1972041B1 publication Critical patent/EP1972041B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/64—Devices for uninterrupted current collection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/523—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases for use under water
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/53—Bases or cases for heavy duty; Bases or cases for high voltage with means for preventing corona or arcing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
    • H01R4/4881—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a louver type spring

Definitions

  • the invention relates to a high voltage swivel, comprising an annular outer element defining a cylindrical chamber around a longitudinal axis and an inner cylindrical element coaxial with the outer element and rotatable relative to said outer element around said longitudinal axis, the inner and outer elements each comprising two axially spaced electrical conductors which conductors are rotatable with the inner and outer elements, the conductors forming two pairs placed with contact surfaces in mutual electrical contact, one conductor in each pair being provided at the inner element, the other at the outer element and being connected to a respective voltage line which extends to an input terminal and to an output terminal respectively, the conductors being surrounded by an insulating material.
  • the invention also relates to a medium voltage swivel of the above mentioned type.
  • Such a swivel is known from US patent nr. 4,252,388 describing a slip ring mounted in a buoy for power transmission from a generating vessel to an offshore installation.
  • the vessel can weathervane around the buoy in response to wind en current conditions, the slip ring transmitting high voltage three phase power.
  • the conductors of the inner element -rotor- are annular plates mounted on a central frame of dielectric support brackets, alternately with washer-like dielectric barriers.
  • the conductors of the outer element -stator- are provided by carbon brushes mounted in brush holders 69 and contact the conductive copper rings of the contacts of the rotor.
  • the open ring stack allows high dielectric insulating oil to circulate through the stack, allowing smaller dimensions compared to using air as a dielectric.
  • the known swivel has as a disadvantage that the dielectric oil may be contaminated by the particles originating from the carbon brushes upon wear. Hereby the maximum voltage which can be transmitted by the swivel is limited.
  • the swivel according to the present invention is characterised in that the electrical contacts of the outer element arejroy_idgdjn ajrecess in an annular so.HdjQiitei insulating ring, the electrical contacts of the inner element are provided in a recess in an annular solid inner insulating ring, coaxial with the outer ring, the inner and outer insulating rings each defining a boundary surface extending in an axial direction, the boundary surfaces of each rings being placed in close proximity, the electrical conductors being placed with their contact surfaces at or near the boundary surface.
  • the conductors at the outer and at the inner element comprise annular contact surfaces.
  • each electrical contact comprises a connector extending axially from the conductor to a connector surface, situated in an enclosure bound by a cover with a an opening for fixedly receiving a power cable and with fastening means for connecting the cover to the outer element, each connector at the connector surface being provided with a receiving cavity for receiving a conducting wire of the power cable.
  • a suitable material for use as the solid insulating material comprises a polymer solid electric insulator of polyether ether ketone commercially available under the tradename PEEK from Entegri's Inc.
  • a suitable copper alloy for the electrical contacts is commercially available under the tradename MULTDLAM® copper alloy.
  • Multilam is a nickel plated copper alloy strip that uses multiple leaf spring louvers and allows contact to be made via a large number of defined contact points. Each louver forms an independent current bridge, so that the many parallel louvers substantially reduce the overall contact resistance.
  • the electrical swivel of the present invention can be used in an offshore construction comprising a first floating structure provided with a vessel anchored to the sea bed in a weathervariihg manner via a turret, the vessel being provided with at least one swivel according to the invention, an electrical lead extending from a power supply on the vessel to a sub sea power cable via the swivel, the sub sea power cable. .
  • the electrical lead can extend ;to one or more unmanned satellite platforms to ' export for instance 22.5 A ⁇ VA of power, whereas the electrical generation plant is situated on an FPSO due to economy of scale benefits and presence of the operation and maintenance crews.
  • the main drives e.g. gas compression, water injection, gas lift
  • Another suitable application of the high power swivel according to the present invention is to export electricity to an onshore location from an offshore FPSO.
  • gas turbines can be used on the
  • FPSO to produce electricity which is transported, via the swivel according to the present invention and a submarine power cable to an onshore power grid.
  • Fig. 1 shows a longitudinal cross-sectional view of a high voltage swivel according to the present invention
  • Fig. 2 is a schematic cross-sectional view through a conductor pair of Fig. 1
  • Fig. 3 shows an embodiment of a cross-sectional view through the high voltage swivel of Fig. 1;
  • Fig. 4 shows a detail of the rings of the swivel of Fig. 3;
  • Fig. 5 shows an alternative embodiment of a swivel of Fig. 1;
  • Fig. 6a-6c show an offshore system comprising a high voltage swivel according to the present invention.
  • Fig. 1 shows a high voltage swivel 1, comprising a stationary outer annular wall 2 and an inner cylindrical support 3.
  • the outer annular wall 2 is connected to top and bottom connector boxes 4,5 for connection to three phase power cables 6, 7.
  • five insulating rings 8,9,10,11 and 12 are provided which are fixed to the outer wall 2.
  • Bi the insulating rings 8-13 a recess is provided in which an annular conductor 15,16,17,18 is situated.
  • a boundary surface 20 of the outer insulating rings 8-11 is contacting the boundary surface of five inner annular insulators 21-24 which are , -fixed to the inner cylindrical, support 3.
  • the inner annular insulators 21-24 and "the cylindrical element 3 are rotatable around longitudinal axis 27.
  • Conductors 28-31 are provided in recesses of the insulating rings 21-24.
  • the conductors 28-31 are preferably formed by ring-shaped conductors, but may be comprised of other shapes, such as cylindrical or spherical shapes.
  • the insulators 8-12 and 21-24, even as the conductors 15-18 and 28-31 comprise contact surfaces in mutual contact at the boundary surface 20, for transmission of current from a rotatable power lead 6, to a stationary power lead 7.
  • the inner electrical conductors 15-18 are connected to electrical connectors 32,33 which extend axially to a connector surface 34 of the upper connector box 5.
  • the connectors 32, 33 comprise a cavity 35,36 for receiving a cable 38,39 of three phase power lead 6.
  • a cover 40 of the connector box is rotatably connected to the outer wall 2 via bearings 41,42 ,seals 43,44,45 and bolts 47.
  • the lower connector box 4 comprises the same layout as upper connector box 5, and is with a cover 46 fixedly connected to the outer wall 2.
  • the power leads 6,7 are clampingly attached to each cover 40,46 via a clamping device 50.
  • Dielectric oil is protected from overpressure, over temperature and leakage via a Buchholz Relay unit 51 comprising a compensation bladder for accommodating thermally induced expansion and contraction of the dielectric oil.
  • the present swivel is suitable for high voltages, such as 33kV at currents of 395 A or more.
  • the conductor 15 shown in Fig. 2 is made of bronze and has rounded corners for ease of assembly.
  • the opposite bronze conductor 18 is provided with recesses in which a multi-contact ring, such as a Multilam ® ring, is provided for a resilient conductive contact in a number of contact points, hence reducing contact friction.
  • the gap 83 between the conductors 15, 18 is filled with dielectric oil.
  • the inner cylindrical support 3, which may be the rotating part, the outer wall 2 being stationary, is comprised of a first split ring and an inner ring 3 'of closed circumference, to which the power cables 38, 39 are connected.
  • the split ring of the cylindrical support 3 can. slightly deform and remain stationary against outer wall 2, upon small excursions of inner ring 3'.
  • rotations, e.g larger than 5° of the inner ring 3',: the split ring of support 3 : will follow the outerri ⁇ g's movements.
  • the inner ' and outer rings 3,3' are coupled via biasing spring 14.
  • the inner ring 3' is attached to the outer cylindrical support 3 of closed circumference via radial projection 19, which is situated between two springs 14, 14'on the cylindrical support 3. This allows small motions of the inner ring 3 'with respect to the support 3, which upon such small motions can remain stationary against outer wall 2 to avoid small motion wear.
  • Fig. 6a-6c show an offshore system comprising a Floating Production Storage and Offloading vessel (FPSO) 60 which is anchored to the sea bed 61 via a turret 62, at the bottom of which anchor lines 63 and 64 are attached.
  • the vessel 60 can weathervane around the turret 62, which is geostationary.
  • a product riser 65 extends from a sub sea hydrocarbon well to a product swivel (not shown) on the FPSO 60 and from the product swivel via duct 65 'to production and/or processing equipment on the FPSO.
  • gas produced from the well may be converted into electricity which is supplied to a swivel 67 according to the present invention.
  • the power lead 68 extending from the power generation unit 66 is attached to conductors on the inner cylindrical support of the swivel 67 which is stationary relative to vessel 60.
  • the power lead 69, extending to the sea bed is connected to the electrical conductors of the outer annular wall of the swivel 67 which is fixedly attached to the turret 62.
  • the power lead 69 may extend, to an unmanned platform 70 attached to the sea bed via product riser 70', such as a gas riser, or may extend to an on-shore power grid 71, or may be connected to heating elements 75, 76 of a substantially horizontal hydrocarbon transfer duct 77 between two floating structures 72,73.

Landscapes

  • Insulators (AREA)
  • Waveguide Connection Structure (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Pens And Brushes (AREA)
  • Holo Graphy (AREA)

Abstract

High voltage swivel, comprising an annular outer element around a longitudinal axis and an inner cylindrical element coaxial with the outer element and rotatable relative to said outer element around said axis, each comprising at least two axially spaced conductors rotatable with the inner and outer elements, the conductors forming pairs placed with contact surfaces in mutual electrical contact. One conductor in each pair is provided at the inner element, the other at the outer element and connected to a respective voltage line, the conductors of the outer element are provided in a recess in an annular solid outer insulating ring, the conductors of the inner element are provided in a recess in an annular solid inner insulating ring, coaxial with the outer ring, the inner and outer insulating rings each defining a boundary surface in an axial direction, the boundary surfaces of the rings being placed in close proximity, and the conductors with their contact surfaces at or near the boundary surface.

Description

High or medium voltage swivel
The invention relates to a high voltage swivel, comprising an annular outer element defining a cylindrical chamber around a longitudinal axis and an inner cylindrical element coaxial with the outer element and rotatable relative to said outer element around said longitudinal axis, the inner and outer elements each comprising two axially spaced electrical conductors which conductors are rotatable with the inner and outer elements, the conductors forming two pairs placed with contact surfaces in mutual electrical contact, one conductor in each pair being provided at the inner element, the other at the outer element and being connected to a respective voltage line which extends to an input terminal and to an output terminal respectively, the conductors being surrounded by an insulating material. The invention also relates to a medium voltage swivel of the above mentioned type.
Such a swivel is known from US patent nr. 4,252,388 describing a slip ring mounted in a buoy for power transmission from a generating vessel to an offshore installation. The vessel can weathervane around the buoy in response to wind en current conditions, the slip ring transmitting high voltage three phase power. The conductors of the inner element -rotor- are annular plates mounted on a central frame of dielectric support brackets, alternately with washer-like dielectric barriers. The conductors of the outer element -stator- are provided by carbon brushes mounted in brush holders 69 and contact the conductive copper rings of the contacts of the rotor. The open ring stack allows high dielectric insulating oil to circulate through the stack, allowing smaller dimensions compared to using air as a dielectric.
The known swivel has as a disadvantage that the dielectric oil may be contaminated by the particles originating from the carbon brushes upon wear. Hereby the maximum voltage which can be transmitted by the swivel is limited.
Furthermore, use of a circulating liquid dielectric insulator in the known swivel is relatively complex and requires the need for additional pumps and liquid tight design of bearings, while at the same time posing limitations to the maximum voltage to be transmitted by the swivel.
It therefore is an object of the present invention to provide a medium/high voltage swivel, preferably a high voltage swivel of compact and reliable design. It is a further object of the present invention to provide a swivel which can be operated a relatively high voltages.
Hereto the swivel according to the present invention is characterised in that the electrical contacts of the outer element arejroy_idgdjn ajrecess in an annular so.HdjQiitei insulating ring, the electrical contacts of the inner element are provided in a recess in an annular solid inner insulating ring, coaxial with the outer ring, the inner and outer insulating rings each defining a boundary surface extending in an axial direction, the boundary surfaces of each rings being placed in close proximity, the electrical conductors being placed with their contact surfaces at or near the boundary surface.
By the use of solid insulating material in the form of insulating rings, a high dielectric strength can be achieved such that high voltages on the electrical contacts are possible, such as voltages up to 33 kV at for instance a nominal current of 395 A. Furthermore, the use of the solid. insulating material allows the size and; Weight of the swivel to be reduced, and hence helps to limit bending moments on the turret swivel stack. Reduced contamination of the insulating material by particles resulting from wear of the electrical contacts occurs, such that the insulating properties are maintained during the lifetime of the swivel. In one embodiment, the conductors at the outer and at the inner element comprise annular contact surfaces. By the use of ring-shaped contact surfaces, instead of known carbon brushes, contamination of dielectric oil in the swivel, which can be used inside for instance 1 IkV can be avoided.
In the swivel, each electrical contact comprises a connector extending axially from the conductor to a connector surface, situated in an enclosure bound by a cover with a an opening for fixedly receiving a power cable and with fastening means for connecting the cover to the outer element, each connector at the connector surface being provided with a receiving cavity for receiving a conducting wire of the power cable. By integration of the power cable in terminal boxes that are integrated in the body of the swivel, certification of the complete swivel can be carried out without a lower voltage limit being imposed by the connectors, which would be the case when connectors of an Exe protected type would be applied. A suitable material for use as the solid insulating material comprises a polymer solid electric insulator of polyether ether ketone commercially available under the tradename PEEK from Entegri's Inc.
A suitable copper alloy for the electrical contacts is commercially available under the tradename MULTDLAM® copper alloy. Multilam is a nickel plated copper alloy strip that uses multiple leaf spring louvers and allows contact to be made via a large number of defined contact points. Each louver forms an independent current bridge, so that the many parallel louvers substantially reduce the overall contact resistance.
Because of the high power transmitted by the electrical swivel of the present invention, it can be used in an offshore construction comprising a first floating structure provided with a vessel anchored to the sea bed in a weathervariihg manner via a turret, the vessel being provided with at least one swivel according to the invention, an electrical lead extending from a power supply on the vessel to a sub sea power cable via the swivel, the sub sea power cable. . , The electrical lead can extend ;to one or more unmanned satellite platforms to ' export for instance 22.5 A^VA of power, whereas the electrical generation plant is situated on an FPSO due to economy of scale benefits and presence of the operation and maintenance crews. On the platforms the main drives (e.g. gas compression, water injection, gas lift) are electrical, high reliability and low maintenance allowing the platforms to be unmanned.
Another suitable application of the high power swivel according to the present invention is to export electricity to an onshore location from an offshore FPSO. Instead of reinjection into the well or transport of gas to shore, gas turbines can be used on the
FPSO to produce electricity which is transported, via the swivel according to the present invention and a submarine power cable to an onshore power grid.
Again another application of the present swivel is to supply power from an FPSO to a sub sea pipeline for heating of the pipeline to counteract hydrate formation due to low sea water temperatures.
An embodiment of a high voltage swivel according to the present invention will be described in detail, by way of non-limiting example, in the appended drawing. In the drawing:
Fig. 1 shows a longitudinal cross-sectional view of a high voltage swivel according to the present invention, Fig. 2 is a schematic cross-sectional view through a conductor pair of Fig. 1 ; Fig. 3 shows an embodiment of a cross-sectional view through the high voltage swivel of Fig. 1;
Fig. 4 shows a detail of the rings of the swivel of Fig. 3; Fig. 5 shows an alternative embodiment of a swivel of Fig. 1; and
Fig. 6a-6c show an offshore system comprising a high voltage swivel according to the present invention.
Fig. 1 shows a high voltage swivel 1, comprising a stationary outer annular wall 2 and an inner cylindrical support 3. The outer annular wall 2 is connected to top and bottom connector boxes 4,5 for connection to three phase power cables 6, 7. Within the annular wall 2, five insulating rings 8,9,10,11 and 12 are provided which are fixed to the outer wall 2. Bi the insulating rings 8-13 a recess is provided in which an annular conductor 15,16,17,18 is situated. A boundary surface 20 of the outer insulating rings 8-11 is contacting the boundary surface of five inner annular insulators 21-24 which are , -fixed to the inner cylindrical, support 3. The inner annular insulators 21-24 and "the cylindrical element 3 are rotatable around longitudinal axis 27. Conductors 28-31 are provided in recesses of the insulating rings 21-24. The conductors 28-31 are preferably formed by ring-shaped conductors, but may be comprised of other shapes, such as cylindrical or spherical shapes. The insulators 8-12 and 21-24, even as the conductors 15-18 and 28-31 comprise contact surfaces in mutual contact at the boundary surface 20, for transmission of current from a rotatable power lead 6, to a stationary power lead 7.
The inner electrical conductors 15-18 are connected to electrical connectors 32,33 which extend axially to a connector surface 34 of the upper connector box 5. The connectors 32, 33 comprise a cavity 35,36 for receiving a cable 38,39 of three phase power lead 6. A cover 40 of the connector box is rotatably connected to the outer wall 2 via bearings 41,42 ,seals 43,44,45 and bolts 47. The lower connector box 4 comprises the same layout as upper connector box 5, and is with a cover 46 fixedly connected to the outer wall 2. The power leads 6,7 are clampingly attached to each cover 40,46 via a clamping device 50.
Dielectric oil is protected from overpressure, over temperature and leakage via a Buchholz Relay unit 51 comprising a compensation bladder for accommodating thermally induced expansion and contraction of the dielectric oil. The present swivel is suitable for high voltages, such as 33kV at currents of 395 A or more.
The conductor 15 shown in Fig. 2 is made of bronze and has rounded corners for ease of assembly. The opposite bronze conductor 18 is provided with recesses in which a multi-contact ring, such as a Multilam® ring, is provided for a resilient conductive contact in a number of contact points, hence reducing contact friction. The gap 83 between the conductors 15, 18 is filled with dielectric oil.
As can be seen from Fig. 3, the inner cylindrical support 3, which may be the rotating part, the outer wall 2 being stationary, is comprised of a first split ring and an inner ring 3 'of closed circumference, to which the power cables 38, 39 are connected. To avoid wear of the conductors 15-18 and 21-24 due to constant small-motion relative movements of the rings 2 and 3, the split ring of the cylindrical support 3 can. slightly deform and remain stationary against outer wall 2, upon small excursions of inner ring 3'. Upon larger, rotations, e.g larger than 5° , of the inner ring 3',: the split ring of support 3: will follow the outerriήg's movements. As can be seen from Fig. 4', the inner ' and outer rings 3,3' are coupled via biasing spring 14.
In the embodiment of Fig. 4, the inner ring 3' is attached to the outer cylindrical support 3 of closed circumference via radial projection 19, which is situated between two springs 14, 14'on the cylindrical support 3. This allows small motions of the inner ring 3 'with respect to the support 3, which upon such small motions can remain stationary against outer wall 2 to avoid small motion wear.
Fig. 6a-6c show an offshore system comprising a Floating Production Storage and Offloading vessel (FPSO) 60 which is anchored to the sea bed 61 via a turret 62, at the bottom of which anchor lines 63 and 64 are attached. The vessel 60 can weathervane around the turret 62, which is geostationary. A product riser 65 extends from a sub sea hydrocarbon well to a product swivel (not shown) on the FPSO 60 and from the product swivel via duct 65 'to production and/or processing equipment on the FPSO. In a power generation unit 66, gas produced from the well may be converted into electricity which is supplied to a swivel 67 according to the present invention. The power lead 68 extending from the power generation unit 66 is attached to conductors on the inner cylindrical support of the swivel 67 which is stationary relative to vessel 60. The power lead 69, extending to the sea bed is connected to the electrical conductors of the outer annular wall of the swivel 67 which is fixedly attached to the turret 62. The power lead 69 may extend, to an unmanned platform 70 attached to the sea bed via product riser 70', such as a gas riser, or may extend to an on-shore power grid 71, or may be connected to heating elements 75, 76 of a substantially horizontal hydrocarbon transfer duct 77 between two floating structures 72,73.

Claims

1. High or medium voltage swivel (1), comprising an annular outer element (2) defining a cylindrical chamber around a longitudinal axis (27) and an inner cylindrical 5 element (3) coaxial with the outer element (2) and rotatable relative to said outer element around said longitudinal axis (27), the inner and outer elements each comprising at least two axially spaced electrical conductors (15,16,17,18;28,29,30,31) which conductors are rotatable with the inner and outer elements (2,3), the conductors forming at least two pairs (15,28;16,29;17,30;18,31) placed with contact surfaces in
10 mutual electrical contact, one conductor in each pair (15,16,17,18) being provided at the inner element (3), the other (28, 29, 30, 31) at the outer element (2)and being connected to a respective voltage line (32,33)) which extends to an input terminal (6) and to an output terminal (7) respectively, the conductors (15-18,28-31) being surrounded by an insulating material, characterised in that,
15. - the electrical conductors (28-31) of the outer element (2) are provided iri a recess in an annular solid outer insulating ring (8,9,10,11,12), the electrical conductors (15-18) of the inner element (3) are provided in a recess in an annular solid inner insulating ring (21,22,23,24), coaxial with the outer ring, the inner and outer insulating rings (8-12,21-24) each defining a boundary surface (20, 0 20') extending in an axial direction, the boundary surfaces of the rings being placed in close proximity, the electrical conductors being placed with their contact surfaces at or near the boundary surface (20,20').
2. High or medium voltage swivel (1) according to claim 1, wherein the conductors 5 (15-18,28-31) at the outer and at the inner element (2,3) comprise annular contact surfaces.
3. High or medium voltage swivel (1) according to claim 1 or 2, each electrical conductor being attached to a connector (32,33) extending axially from the conductor 0 to a connector surface (34), situated in an enclosure bound by a cover (40) with a an opening 50) for fixedly receiving a power cable (6) and with fastening means (47) for connecting the cover (40) to the outer element (2), each connector (32,33) at the connector surface (34) being provided with a receiving cavity (35,36) for receiving a conducting wire (38,39) of the power cable (6).
4. High or medium voltage swivel (1) according to claim 1, 2 or 3, the insulating ring (8-12;21-24) comprising a solid insulator of a thermoplastic polymer, such as
PEEK, PES, PTFE or Teflon®.
5. High or medium voltage swivel according to claim 4, the insulating ring comprising a polyether ether ketone (PEEK) polymer.
6 High or medium voltage swivel (1) according to any of the preceding claims, wherein the electrical conductors comprise a copper alloy, such as a MULTILAM® conductor. .
7. High or medium vόltagevswivel (1), according to aαy of the preceding claims, wherein each conductor (15-18;28-31) comprises an annular metai contact surface.
8. High or medium voltage swivel (1) according to claim 7, the metal comprising a copper alloy, such as a MULTILAM® conductor.
9. Offshore construction comprising a first floating structure (60 anchored to the sea bed in a weathervaning manner via a turret (62), the structure (60) being provided with at least one swivel (67) according to any of claims 1 to 8, an electrical lead (68) extending from a power supply (66) on the vessel to a sub sea power cable (69) via the swivel.
10. Offshore construction according to claim 9, the power cable (69) extending to at least a second floating structure (70), at a distance from the first structure, the second structure connected to a sub sea hydrocarbon well via a riser(70').
11. Offshore construction according to claim 10, the first floating structure (60) being connected to a sub sea gas field via a riser (65), the power cable (69) extending to an on shore power grid (71), the power supply (66) at the first floating structure (60) comprising a gas turbine.
12. Offshore construction according to claim 9, the power cable (69) being connected to a sub sea hydrocarbon transport duct (74) provided with heating elements (75,76) for temperature control of the transported hydrocarbon.
EP05817894A 2005-12-16 2005-12-16 High or medium voltage swivel Expired - Lifetime EP1972041B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2005/013941 WO2007068278A1 (en) 2005-12-16 2005-12-16 High or medium voltage swivel

Publications (2)

Publication Number Publication Date
EP1972041A1 true EP1972041A1 (en) 2008-09-24
EP1972041B1 EP1972041B1 (en) 2009-08-19

Family

ID=36809254

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05817894A Expired - Lifetime EP1972041B1 (en) 2005-12-16 2005-12-16 High or medium voltage swivel

Country Status (4)

Country Link
EP (1) EP1972041B1 (en)
AT (1) ATE440395T1 (en)
DE (1) DE602005016171D1 (en)
WO (1) WO2007068278A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8269590B2 (en) 2008-04-14 2012-09-18 Aker Engineering & Technology As Rotary transformer
JP5566395B2 (en) * 2008-12-01 2014-08-06 シングル ブイ ムーリングス インコーポレイテッド High voltage swivel with stacked annular conductor assembly
SE537490C2 (en) * 2012-12-13 2015-05-19 Flowocean Ltd Mooring buoy
RU2663217C2 (en) 2013-08-01 2018-08-02 Сингл Бой Мурингс Инк. Compact high-voltage connector

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4252388A (en) * 1979-05-21 1981-02-24 Litton Systems, Inc. High power slip ring assembly

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007068278A1 *

Also Published As

Publication number Publication date
ATE440395T1 (en) 2009-09-15
EP1972041B1 (en) 2009-08-19
DE602005016171D1 (en) 2009-10-01
WO2007068278A1 (en) 2007-06-21

Similar Documents

Publication Publication Date Title
EP2353213B1 (en) High voltage swivel with stacked ring-shaped conductor assemblies
US7137822B1 (en) High voltage swivel
US11879421B2 (en) Wave energy converter with surface electric grid
US20180269642A1 (en) Joint tournant electrique haute tension
EP1972041B1 (en) High or medium voltage swivel
US8525631B2 (en) Underwater power connector system and use thereof
US9130330B2 (en) Electrical swivel design
US4252388A (en) High power slip ring assembly
CA2531309C (en) High voltage swivel
WO2014092622A1 (en) Mooring buoy
CN100550538C (en) High pressure or middle pressure swivel joint and offshore structure
NO325470B1 (en) Swivel for high or medium voltage
BRPI0505812B1 (en) ROTARY ARTICULATION OF HIGH OR MEDIUM VOLTAGE, AND, CONSTRUCTION OUTSIDE THE COAST
US20250266627A1 (en) Earthing connection device
US20260088234A1 (en) Alternating Current Disconnector for Subsea Operation
WO2014122164A1 (en) Slip ring arrangement
US20240266769A1 (en) High-voltage electrical rotary joint device configured to equip an energy exploitation installation
CN119773915A (en) Floating offshore wind turbines and their connection systems, and interconnection systems
CN103403980B (en) Chicksan, swivel joint stack assemblies and offshore structure
Dwyer et al. Specification of electrical, optical and hydraulic swivels for FPSOs

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20080716

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 602005016171

Country of ref document: DE

Date of ref document: 20091001

Kind code of ref document: P

LTIE Lt: invalidation of european patent or patent extension

Effective date: 20090819

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090819

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090819

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090819

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20091130

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090819

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20091219

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090819

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090819

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090819

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20091221

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20091119

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090819

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090819

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090819

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090819

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090819

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090819

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090819

26N No opposition filed

Effective date: 20100520

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100701

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091231

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091216

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091231

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20091120

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091216

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100220

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090819

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 11

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 12

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20181212

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20181017

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20181220

Year of fee payment: 14

REG Reference to a national code

Ref country code: NL

Ref legal event code: MM

Effective date: 20200101

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20191216

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191216

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191216

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230525

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20241121

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20241121

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 602005016171

Country of ref document: DE