Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
  • H01F38/14—Inductive couplings
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F27/00—Details of transformers or inductances, in general
  • H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F27/00—Details of transformers or inductances, in general
  • H01F27/02—Casings
  • H01F27/022—Encapsulation
• • 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

Definitions

• This invention regards a hotstab device for use under water. More particularly, it regards a hotstab where the hotstab is a complementary fit to a submerged connection block, and where the hotstab comprises passages for conveying pressurized fluid.
• a first transformer section is arranged on the hotstab and a second transformer section, which in the operative position cooperates with the first transformer section, is located at the connection block, the transformer sections providing noncontact transmission of electrical energy.
• noncontact transmission of energy refers to the transmission of energy between bodies without any mechanical contact.
• the following is based on the hotstab being located on an ROV. This example is used for illustrative purposes and will in no way limit the scope of the invention. Only recently has equipment emerged which, has a satisfactory capacity for noncontact transmission of any significant amount of energy.
• Norwegian patent no. 320439 describes a method of transferring energy between two separated bodies by means of a resonant circuit between two transformer halves .
• the object of the invention is to remedy or reduce at least one of the drawbacks of prior art
• a hotstab for use under water where the hotstab is a complementary fit to a submerged connection block, and where the hotstab comprises passages for conveying pressurized fluid, there is provided a first transformer section.
• a second transformer section which in the operative position cooperates with the first transformer section, is located at the connection block.
• the transformer sections provide noncontact transmission of electrical energy.
• the noncontact transmission of energy is inductive and may be used for both signal transmission and power transmission.
• the transformer sections are made to be mechanically pushed into each other or against each other, at least one of the first transformer section or the second transformer section advantageously being arranged in a rubber-like material.
• the open gap between the first transformer section and the second transformer section must be as narrow as possible to achieve the highest possible efficiency for the energy transmission.
• the transformer halves are arranged such that the transformer halves are not pushed into or against each other until after the hotstab is properly guided in the connection block.
• Embedding transformer halves in a flexible material is not obvious to a person skilled in the art, among other things because a person skilled in the art would anticipate problems of overheating in the transformer halves.
• the flexible material may at least partly consist of elastomers such as polyurethane, natural rubber or synthetic rubber.
• the device of the invention provides a simple and novel solution for parts for noncontact transmission of energy and presents a practical design for fastening of the transformer halves .
• Fig. 1 is a schematic sectional view of a connection block, where a hotstab is in the process of being pushed into the connection block, and where means of noncontact transmission of energy in accordance with the invention is provided in connection with the connection block and the hot stab, respectively;
• Fig. 2 is a schematic view of the connection block and the hotstab of figure 1 after they have been connected up.
• reference number 1 denotes a hotstab connected to an ROV (not shown) by an ROV mounting 2, the hotstab 1 being arranged for displacement into a connection block 4 associated with a subsea installation (not shown) .
• the hotstab 1 is provided with passages 6 that communicate with the ROV (not shown) in a manner that is known per se.
• the passages 6 When in the operative position in the connection block 4, the passages 6 are sealingly encapsulated by seals 8.
• Each passage 6 corresponds with a respective conduit 10 in the connection block 4.
• the hotstab 1 is provided with a first transformer section 12, the transformer section 12 of this preferred embodiment encircling the hotstab 1 near the ROV mounting 2.
• the first transformer section 12 comprises a first transformer coil 14 and first transformer armature 16.
• the first transformer coil 14 is connected to the ROV (not shown) via a first pair 18 of conductors that passes through an opening 20 in the hotstab 1.
• the first transformer section 12 is disposed in an encircling first groove 22 in the hotstab 1.
• connection block 4 Opposite and corresponding to the first transformer section 14, when this is in the operative position, there is provided a second transformer section 24 in a second groove 26 located in the connection block 4.
• the second transformer section 24 comprises a second transformer coil 28 and second transformer armature 30.
• the second transformer coil 28 is connected to the subsea installation (not shown) via a second pair 32 of conductors that passes through an opening 34 in the connection block 4.
• the first transformer section 12 and the second transformer section 24, constructed in accordance with NO 320439 and thus not explained in any greater detail herein, are both disposed in a rubber-like material 36.
• the rubber-like material 36 is made of an elastomeric mouldable material such as polyurethane .
• a number of other elastomeric materials based on rubber and synthetic fibres may be used, and these may be adapted for the purpose through e.g. moulding or machining .
• the important thing is that the material (s) selected has a resilient effect .

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Housings And Mounting Of Transformers (AREA)
• Lining Or Joining Of Plastics Or The Like (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=38309460

Family Applications (1)

Country Status (2)

Cited By (1)

Citations (3)

• 2006
  • 2006-01-24 NO NO20060368A patent/NO324407B1/no not_active IP Right Cessation
• 2007
  • 2007-01-22 WO PCT/NO2007/000022 patent/WO2007086753A1/en active Application Filing

Patent Citations (3)

Also Published As

Similar Documents

Legal Events