Bundling dynamic cable for offshore oil platform

Abstract

A bunched dynamic cable for an offshore oil platform relates to the technical field of cables and comprises a central layer, an inner-layer power line, an outer-layer power line, a braid layer and an outer protective layer which are sequentially arranged from inside to outside. The central layer adopts a shielded twisted pair, and a conductor of the shielded twisted pair is filled with a water-blocking material; the inner-layer power line comprises a plurality of electric wires, shielded twisted pairs and optical fibers, conductors of the electric wires and the shielded twisted pairs are filled with water-blocking materials, and fiber cores of the optical fibers are filled with water-blocking materials; the outer-layer power line comprises an outer-layer internal power line and an outer-layer external power line, and the outer-layer internal power line and the outer-layer external power line are formed by twisting a plurality of electric wires; the woven layer is formed by weaving Kevlar fibers; the dynamic cable provided by the utility model can simultaneously meet the requirements of water resistance, corrosion resistance, flexibility and tensile strength, and ensures the stable transmission of electric power and signals of an offshore oil platform.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a bundled dynamic cable for offshore oil platforms. Background Art

[0002] Due to the large thickness of oil reservoirs in the ocean, high reserves, and high single-well production, the benefits are also high. With the continuous advancement of marine oil exploration and development technology, offshore oil development has developed rapidly. In the power transmission and communication systems of offshore oil platforms, bundled dynamic cables play a vital role. Their main function is to supply power and transmit signals from FPSO to oil production platforms. Dynamic cables have strict requirements on design performance. Due to the constant changes in ocean currents, dynamic cables are subjected to different tensile loads. The attachment of marine organisms and other microorganisms leads to increased corrosion of dynamic cables. In addition, the special structure has a small bending radius. Therefore, the structural design of dynamic cables should meet the properties of water resistance, corrosion resistance, flexibility, and tensile strength. Existing dynamic cables are difficult to meet the above requirements at the same time and cannot guarantee the stable transmission of power and signals on offshore oil platforms. This solution is an improvement on the existing technology. Utility Model Content

[0003] In view of the above deficiencies in the prior art, the purpose of the present invention is to provide a bundled dynamic cable for offshore oil platforms, which can solve the above technical problems.

[0004] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0005] A bundled dynamic cable for an offshore oil platform comprises a central layer, an inner power line, an outer power line, a braided layer and an outer sheath, which are arranged in sequence from the inside to the outside. The central layer uses a shielded twisted pair, the conductors of which are filled with a water-blocking material, and the conductors of which are covered with a water-blocking sheath. The inner power line comprises a plurality of wires, a shielded twisted pair and an optical fiber, the conductors of which are filled with a water-blocking material, the optical fiber is covered with a stainless steel tube, and the core of the optical fiber is filled with a water-blocking material. The outer power line comprises an outer inner power line and an outer outer power line, both of which are formed by twisting a plurality of wires together. The braided layer is woven from Kevlar fibers. The outer sheath comprises a double layer of high-strength polyurethane material.

[0006] Preferably, the gaps between the inner power line and the outer power line are filled with sealant.

[0007] Preferably, an inner shielding layer is provided between the inner power line and the outer power line, and an outer shielding layer is provided between the outer power line and the braided layer. Both the inner shielding layer and the outer shielding layer are formed by sparsely wound copper wires.

[0008] Preferably, the water-blocking material is a water-blocking tape or a water-blocking paste.

[0009] Preferably, the wires in the inner power line and the shielded twisted pair have the same diameter, and the wires in the outer internal power line and the outer external power line have the same diameter.

[0010] Preferably, the diameter of the shielded twisted pair wires in the central layer is larger than the diameter of the shielded twisted pair wires in the inner layer power lines, and the diameter of the wires in the outer layer power lines is larger than the diameter of the wires in the inner layer power lines.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. Filling the bundled dynamic cable structure with water-blocking material and filling the internal gaps with sealant improves the water-blocking performance of the dynamic cable. The use of sealant can reduce the weight of the dynamic cable, making it suitable for floating dynamic use environments.

[0013] 2. Kevlar fiber is used as the tensile load-bearing element of the cable, which can better ensure the softness of the cable. It has excellent properties such as waterproof, oil-resistant, wear-resistant, tensile, and acid, alkali, and salt spray corrosion resistance. It is especially suitable for underwater tensile use.

[0014] 3. High-strength polyurethane material is used as the outer sheath of the dynamic cable. High-strength polyurethane material has very high mechanical resistance, waterproofness and corrosion resistance in salt spray environment, and is not easy to wear under dynamic use environment in the ocean. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Description of reference numerals:

[0018] 1-shielded twisted pair, 2-electrical wire, 3-optical fiber, 4-outer inner power wire, 5-outer outer power wire, 6-braided layer, 7-outer sheath, 8-inner shield, 9-outer shield. DETAILED DESCRIPTION

[0019] The following describes the invention of the present invention in detail by way of examples in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Example

[0020] like Figure 1 As shown, the utility model discloses a bundled dynamic cable for offshore oil platforms, comprising a central layer, an inner power line, an outer power line, a braided layer 6 and an outer sheath 7, which are arranged in sequence from the inside to the outside; the central layer adopts a shielded twisted pair 1, the interior of the conductor of the shielded twisted pair 1 is filled with a water-blocking tape, and the outer side of the conductor of the shielded twisted pair 1 is covered with a water-blocking sheath; the inner power line comprises six electric wires 2, a shielded twisted pair 1 and two optical fibers 3, the interiors of the six electric wires 2 and the conductor of the shielded twisted pair 1 are all filled with water-blocking tape, the outer sides of the two optical fibers 3 are covered with stainless steel tubes, and the cores of the optical fibers 3 are filled with water-blocking paste; the outer power line comprises an outer internal power line 4 and an outer external power line 5, the outer internal power line The wire 4 is formed by nine wires 2 twisted together and tied with a water-blocking tape to prevent it from loosening, and it also plays a water-blocking role; the outer external power cord 5 is formed by fifteen wires 2 twisted together; the braided layer 6 is woven from Kevlar fiber, and Kevlar fiber is used as the tensile load-bearing element of the cable, which can better ensure the softness of the cable, and has excellent waterproof, oil-resistant, wear-resistant, tensile, acid-alkali and salt spray corrosion resistance, etc., and is particularly suitable for underwater tensile use; the outer sheath 7 adopts a double-layer high-strength polyurethane material, and a high-strength polyurethane material is used as the outer sheath 7 of the dynamic cable. The high-strength polyurethane material has very high mechanical resistance, waterproofness and corrosion resistance in salt spray environment, and is not easy to wear under dynamic use environment in the ocean.

[0021] Furthermore, in this embodiment, the gaps between the inner power line and the outer power line are filled with sealant, which ensures the water-blocking performance of the dynamic cable and also reduces the weight of the dynamic cable, making it suitable for floating dynamic use environments.

[0022] Furthermore, in this embodiment, an inner shielding layer 8 is provided between the inner power line and the outer power line, and an outer shielding layer 9 is provided between the outer power line and the braided layer 6. The inner shielding layer 8 and the outer shielding layer 9 are both formed by sparsely wound copper wire.

[0023] Furthermore, in this embodiment, the wires 2 in the inner power line and the shielded twisted pair 1 have the same diameter, and the wires 2 in the outer internal power line 4 and the wires 2 in the outer external power line 5 have the same diameter.

[0024] Furthermore, in this embodiment, the diameter of the shielded twisted pair 1 in the central layer is larger than the diameter of the shielded twisted pair 1 in the inner power line, and the diameter of the wire 2 in the outer power line is larger than the diameter of the wire 2 in the inner power line.

[0025] The dynamic cable of the utility model can simultaneously meet the requirements of water resistance, corrosion resistance, flexibility and tensile strength, thereby ensuring stable transmission of power and signals on offshore oil platforms.

[0026] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and application concept of the present invention, should be covered by the protection scope of the present invention.

Claims

1. A bundled dynamic cable for offshore oil platforms, characterized by: The invention comprises a central layer, an inner power line, an outer power line, a braided layer (6) and an outer sheath (7) which are arranged in sequence from the inside to the outside; the central layer adopts a shielded twisted pair (1), the conductor of the shielded twisted pair (1) is filled with a water-blocking material, and the outer side of the conductor of the shielded twisted pair (1) is covered with a water-blocking sheath; the inner power line comprises a plurality of electric wires (2), a shielded twisted pair (1) and an optical fiber (3), the conductors of the electric wires (2) and the shielded twisted pair (1) are filled with a water-blocking material, and the outer side of the conductor of the shielded twisted pair (1) is covered with a water-blocking sheath; The outer side of the optical fiber (3) is covered with a stainless steel tube, and the core of the optical fiber (3) is filled with a water-blocking material; the outer power line includes an outer internal power line (4) and an outer external power line (5), and the outer internal power line (4) and the outer external power line (5) are both formed by twisting a plurality of wires (2); the braided layer (6) is woven from Kevlar fibers; the outer sheath (7) is made of a double-layer high-strength polyurethane material; and the gaps between the inner power line and the outer power line are filled with sealant.

2. The bundled dynamic cable for offshore oil platforms according to claim 1, characterized in that: An inner shielding layer (8) is provided between the inner power line and the outer power line, and an outer shielding layer (9) is provided between the outer power line and the braided layer (6). Both the inner shielding layer (8) and the outer shielding layer (9) are formed by sparsely wound copper wires.

3. The bundled dynamic cable for offshore oil platforms according to claim 1, characterized in that: The water-blocking material is a water-blocking tape or a water-blocking paste.

4. The bundled dynamic cable for offshore oil platforms according to claim 1, characterized in that: The wires (2) in the inner power line and the shielded twisted pair (1) have the same diameter, and the wires (2) in the outer internal power line (4) and the wires (2) in the outer external power line (5) have the same diameter.

5. The bundled dynamic cable for offshore oil platforms according to claim 1, characterized in that: The diameter of the shielded twisted pair wire (1) in the central layer is larger than the diameter of the shielded twisted pair wire (1) in the inner layer power line, and the diameter of the wire (2) in the outer layer power line is larger than the diameter of the wire (2) in the inner layer power line.

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