CN112735655A

CN112735655A - Ocean towing cable

Info

Publication number: CN112735655A
Application number: CN202011530707.5A
Authority: CN
Inventors: 蒋峰; 顾春飞; 牛学超; 邱兴宇; 胡明; 花炜
Original assignee: Zhongtian Technology Submarine Cable Co Ltd
Current assignee: Zhongtian Technology Submarine Cable Co Ltd
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-04-30
Anticipated expiration: 2040-12-22
Also published as: CN112735655B

Abstract

The invention provides a marine towing cable which comprises a force bearing unit, a plurality of wire core units, a first protective layer, a fiber layer and a second protective layer, wherein the force bearing unit, the plurality of wire core units, the first protective layer, the fiber layer and the second protective layer are sequentially arranged from inside to outside; and a first water-resistant layer is filled between the first protective layer and the force bearing unit and fixedly connected with the first protective layer. The marine streamer provided by the invention has better waterproof performance.

Description

Ocean towing cable

Technical Field

The invention relates to the technical field of cables, in particular to a marine streamer.

Background

Marine streamers are commonly used to survey the seafloor to gather information about the source, energy distribution, etc. of the seafloor.

The marine streamer comprises a wrapping layer, a protective layer and a bearing layer, wherein the wrapping layer, the protective layer and the bearing layer are generally provided with a plurality of core units and surround the plurality of core units. And a water-blocking layer is filled in the gap in the wrapping layer to prevent the core unit from water seepage. The wrapping layer is surrounded outside the water-resistant layer, so that the water-resistant layer is relatively round. The marine streamer has better tear resistance in the protective layer. The bearing layer is a steel wire armor layer and is used for bearing the stretching and twisting of the marine towing cable and the like.

However, the wrapping layer is easily separated from the protective layer and the waterproof layer, so that the marine streamer is subjected to water seepage, and the waterproof performance is poor.

Disclosure of Invention

In view of the above, embodiments of the present invention provide a marine streamer having superior water resistance.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

the embodiment of the invention provides a marine streamer, which comprises a force bearing unit, a plurality of wire core units, a first protective layer, a fiber layer and a second protective layer, wherein the force bearing unit, the plurality of wire core units, the first protective layer, the fiber layer and the second protective layer are sequentially arranged from inside to outside; and a first water-resistant layer is filled between the first protective layer and the force bearing unit and fixedly connected with the first protective layer.

Compared with the prior art, the marine streamer provided by the embodiment of the invention has the following advantages: through setting up the load-bearing unit in the inside of marine streamer, can protect the load-bearing unit, avoid the load-bearing unit to break under the circumstances of external force striking or wearing and tearing, improve marine streamer's life. And because the force bearing unit is arranged at the central part of the marine streamer, testers can conveniently add detection equipment at any position of the marine streamer along the length direction, and the use is convenient. Through the first protective layer of direct molding outside first water blocking layer, and first protective layer and water blocking layer fixed connection, gapless between the two, avoid separating between first water blocking layer and the first protective layer and seep water, improved marine streamer's waterproof performance.

In some alternative embodiments, the first water resistant layer and the first protective layer are adhesively secured during the solidification process.

In some optional embodiments, any two adjacent core units are arranged at intervals along the circumferential direction of the marine streamer, and the force bearing unit, the core units and the first protective layer are arranged at intervals along the radial direction of the marine streamer.

In some optional embodiments, the core unit comprises a power supply unit and a data unit for transmitting signals.

In some optional embodiments, the wire core unit comprises a first wire core, a second water-resistant layer and a wrapping layer which are arranged in sequence from inside to outside; and the inner side and the outer side of the wrapping layer are fixedly connected with the second waterproof layer and the first waterproof layer respectively.

In some optional embodiments, the wire core unit further comprises a grounding unit.

In some optional embodiments, the grounding unit comprises a second wire core, a semi-conducting layer and a third protection layer which are sequentially arranged from inside to outside.

In some alternative embodiments, the first protective layer is a foam.

In some alternative embodiments, the density of the first overcoat layer is less than or equal to 0.7g/cm³。

In some optional embodiments, the force bearing unit comprises a fiber bundle and a fourth protective layer surrounding the fiber bundle, and the fourth protective layer is fixedly connected with the first waterproof layer.

In some optional embodiments, the plurality of core units includes at least a power supply unit, a ground unit, and a data unit for transmitting signals.

In some optional embodiments, the plurality of core units further comprises a fiber optic communication unit.

In some optional embodiments, a plurality of protection protrusions are arranged on the outer wall surface of the second protection layer, the protection protrusions are arranged at intervals along the circumferential direction of the second protection layer, and each protection protrusion extends along the length direction of the marine streamer.

In some alternative embodiments, the circumferential spacing between two adjacent protective protrusions is greater than the protrusion width of the protective protrusion.

In addition to the technical problems addressed by the embodiments of the present invention, the technical features constituting the technical solutions, and the advantages brought by the technical features of the technical solutions described above, other technical problems solved by the marine streamer provided by the embodiments of the present invention, other technical features included in the technical solutions, and advantages brought by the technical features will be described in further detail in the detailed description.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of a marine streamer provided by an embodiment of the invention;

FIG. 2 is a schematic structural diagram of a marine streamer external detection device according to an embodiment of the invention.

Reference numerals:

1: a marine streamer;

10: a force bearing unit; 11: a fiber bundle; 12: a fourth protective layer;

20: a wire core unit; 21: a first wire core; 22: a second water resistant layer; 23: wrapping a covering; 24: filling the core; 25: a second wire core; 26: a semiconducting layer; 27: a third protection layer; 210: a power supply unit; 220: a grounding unit; 230: a data unit;

30: a first protective layer;

40: a fibrous layer;

50: a second protective layer; 51: a protective projection;

60: a first water resistant layer;

70: and (5) detecting the equipment.

Detailed Description

In order to make the aforementioned objects, features and advantages of the embodiments of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the prior art, a wrapping layer is arranged between the waterproof layer and the protective layer and used for enabling the waterproof layer to be round. However, can not fastening connection around between covering and the inoxidizing coating, twist reverse, tensile looks mutual separation because of the marine streamer easily around covering and inoxidizing coating, in case the inoxidizing coating damage or marine streamer end is damaged, the sea water can follow the separation clearance and get into, damages external equipment on the whole cable and damages terminal equipment even, and the marine streamer's the performance of blocking water is relatively poor.

In view of this, in the embodiment of the present application, the water blocking layer is directly bonded and fixed to the protective layer, and no gap is formed between the water blocking layer and the protective layer, so that moisture infiltration is avoided, and the water blocking performance of the marine streamer is improved.

FIG. 1 is a schematic structural diagram of a marine streamer provided by an embodiment of the invention. FIG. 2 is a schematic structural diagram of a marine streamer external detection device according to an embodiment of the invention.

Referring to fig. 1 and fig. 2, the embodiment provides a marine streamer 1, which includes a force-bearing unit 10, a plurality of core units 20, a first protective layer 30, a fiber layer 40, and a second protective layer 50, which are sequentially arranged from inside to outside, wherein the plurality of core units 20 are distributed at intervals in the circumferential direction of the force-bearing unit 10; a first water-resistant layer 60 is filled between the first protective layer 30 and the force-bearing unit 10, and the first water-resistant layer 60 is fixedly connected with the first protective layer 30.

Specifically, the force bearing unit 10 is used for bearing the stretching, torsion and the like of the marine streamer 1 and avoiding the fracture of the marine streamer 1. The force bearing unit 10 is located in the central part of the marine streamer 1 and is not damaged by seawater erosion or foreign object impact. Therefore, even if the outer layer of the marine streamer 1 is damaged, the force bearing unit 10 positioned in the center does not break or other faults, the maintenance is easy, and the service life of the marine streamer 1 is prolonged.

The plurality of core units 20 are surrounded on the outer side of the force bearing unit 10 along the circumference of the marine streamer 1. In some optional embodiments, the plurality of core units 20 includes at least a power unit 210, a ground unit 220, and a data unit 230 for transmitting signals. The marine streamer 1 is typically connected to various detection devices, such as geophones, among others. The power supply unit 210 is used to supply power to the detection devices connected to the streamer 1. The grounding unit 220 is used for grounding the detection equipment, deriving residual electric fields in the marine streamer 1 and protecting the detection equipment and the terminal equipment. The data unit 230 is used for transmitting control signals and data information. In some optional embodiments, the plurality of core units 20 further include an optical fiber communication unit, and the signal transmission capacity is large.

The number of the power supply unit 210, the grounding unit 220, the data unit 230, and the optical fiber communication unit may be set as required. For example, the number of the ground units 220 may be two, the number of the data units 230 may be two, the number of the power supply units 210 may be four, and the number of the optical fiber communication units may be one, which is not limited in this embodiment.

The first protective layer 30 surrounds the outside of the plurality of core units 20 and is used for protecting the plurality of core units 20. The detector can be made of hard elastic materials such as polyurethane, and has good pressure resistance, good rebound resilience, good sound transmission effect and good detection effect of detection equipment such as a detector.

The fiber layer 40 is disposed outside the first protective layer 30 to improve the torsional strength and tear resistance of the streamer 1. The fiber layer 40 may be made of aramid fiber, or the like, and has high strength.

The second protective layer 50 surrounds the fiber layer 40, and may be in direct contact with seawater or be impacted by foreign objects. It can be made of high-hardness materials, such as polyurethane, and has strong abrasion resistance and good tearing resistance, so that the marine streamer 1 is well protected.

And the materials of the first protective layer 30 and the second protective layer 50 are compatible, so that in the process of manufacturing the marine streamer 1, the materials of the first protective layer 30 or the second protective layer 50 can be bonded with each other through the fiber layer 40, and the first protective layer 30 and the fiber layer 40, and the fiber layer 40 and the second protective layer 50 are prevented from being separated from each other, so that moisture is prevented from permeating. And the first protective layer 30, the fiber layer 40 and the second protective layer 50 are fixedly connected with each other, the tear resistance and the torsion resistance of the marine streamer 1 are enhanced.

A first water blocking layer 60 is filled between the first protective layer 30 and the bearing unit 10, that is, a water blocking material is wrapped outside each core unit 20, so that water is prevented from permeating into the core units 20 through the first protective layer 30, and the water blocking performance of the marine streamer 1 is good. Meanwhile, the first water blocking layer 60 is distributed along the length direction of the marine streamer 1, and plays a role in longitudinally blocking water for the marine streamer 1.

The first water-blocking layer 60 can be made of a high-performance water-blocking material, has high toughness and high viscosity, and can be effectively bonded and fixed with the wire core unit 20, the force bearing unit 10 and the first protective layer 30, so that the separation phenomenon is avoided.

In some alternative embodiments, the first layer of water-resistant material 60 and the first protective layer 30 are adhesively secured during the curing process. When the marine streamer 1 is molded, the first water-blocking layer 60 is filled and molded through a high-temperature filling process, at the moment, the first water-blocking layer 60 is not cooled and molded and still has viscosity and fluidity, and a release film is arranged outside the first water-blocking layer 60, so that the first water-blocking layer 60 has better roundness. The first protective layer 30 may then be extrusion molded while peeling the release film. In this way, the first water-blocking layer 60 and the first protective layer 30, which are still sticky, are adhesively fixed to each other, and since the first water-blocking layer 60 and the first protective layer 30 still have fluidity, they can fill the gap at the molding position with each other. Thus, after the marine streamer 1 is molded, the first waterproof layer 60 and the first protective layer 30 are firmly bonded without a gap therebetween, so that the separation and moisture infiltration between the first waterproof layer 60 and the first protective layer 30 are avoided, and the waterproof performance of the marine streamer 1 is high.

It will be appreciated that during the formation of the first layer 60 and the first layer 30, the first layer 60 and the first layer 30 are in flow communication with each other and are not bounded by a rounded cylindrical surface. As long as the first water-blocking layer 60 can completely wrap the plurality of core units 20. For example, if the first water-blocking layer 60 and the first protective layer 30 have rounded boundaries, the boundary between the first water-blocking layer 60 and the first protective layer 30 may be shown by the dashed line in fig. 1, with the radial dimension of the first water-blocking layer 60 being greater than the outer edge dimension of the core unit 20.

It can be understood that when the force bearing units 10 of the marine streamer 1 are arranged on the outer layer, for example, the steel wire armoured layer is arranged on the outermost layer of the marine streamer 1, then when the detection equipment needs to be externally connected to the marine streamer 1, the detection equipment can only be connected to the butt joint of two adjacent marine streamers 1, and the use is inconvenient. According to the embodiment of the application, the force bearing unit 10 is arranged at the central part of the marine streamer 1, the wire core unit 20 is arranged at the outer side of the force bearing unit 10 in the radial direction, and the external detection equipment can be conveniently connected to any part of the marine streamer 1 in the length direction without damaging the force bearing unit 10, so that the use is convenient, and the flexibility is high.

Specifically, the operation method of the external detection device is as follows:

the position to be processed of the external detection device on the streamer 1 is first selected.

Sequentially stripping the second protective layer 50, the fiber layer 40 and the first protective layer 30 at the position to be processed, and removing the first water-blocking layer 60 at the position to be processed to expose the wire core unit 20 at the position to be processed; and according to the wiring principle of the detection equipment, welding and insulating the wire core unit 20 and the detection equipment.

Because the detection equipment is generally in a HALF structure, after the wiring treatment is finished, the detection equipment is combined and wrapped on the wire core unit 20 to be connected.

Cleaning impurities on the second protective layers 50 at two ends of the position to be processed, pouring a vulcanizing material at the position to be processed by adopting a mode of injection molding or mould pressing and the like through a mould, and enabling the vulcanizing material to be fully contacted with polyurethane on the second protective layers 50 at two ends of the position to be processed; and (4) keeping the temperature for a set time at the vulcanization temperature until the vulcanization is completed, and removing the mold to complete the processing flow of the external detection equipment.

In some alternative embodiments, any two adjacent core units 20 are spaced along the circumference of the streamer 1, and the force bearing units 10, the core units 20 and the first shielding layers 30 are spaced along the radial direction of the streamer 1. That is to say, along the circumference of the wire core units 20, two adjacent wire core units 20 are arranged at intervals, so that the friction and the abrasion between the wire core units 20 and the force bearing unit 10 are avoided. Meanwhile, the periphery of the wire core unit 20 is wrapped with a water blocking material to protect the wire core unit 20.

In some alternative embodiments, the power supply unit 210 and the data unit 230 are similar in structure, and each includes a first wire core 21, a second water-resistant layer 22 and a wrapping layer 23 arranged in sequence from inside to outside; the inner side and the outer side of the wrapping layer 23 are fixedly connected with the second waterproof layer 22 and the first waterproof layer 60 respectively.

The number and kinds of the first cores 21 can be set according to the requirements of the power supply unit 210 and the data unit 230 to adapt to the use of different detection devices. The second water-resistant layer 22 and the third protection sheath 23 are arranged in the wire core unit 20, so that even if detection equipment is externally connected to the marine streamer 1, radial water resistance can be realized through the second water-resistant layer 22 and vulcanization sealing between the second protection layer 50 and the detection equipment.

That is, by providing the first water blocking layer 60 in the streamer 1 and the second water blocking layer 22 in the core unit 20, various water blocking effects of the streamer 1 are achieved, and the waterproof performance is good.

For example, the data unit 230 may include four first cores 21 of equal size, and the four first cores 21 are disposed along the circumferential direction of the data unit 230. The four first wire cores 21 are wrapped by a wrapping layer 23, and a second waterproof layer 22 is filled between gaps of the first wire cores 21 in the wrapping layer 23.

In order to make the data unit 230 more round, the four first wire cores 21 are also provided with the filler core 24 inside, that is, the filler core 24 is located at the center of the data unit 230.

The first wire core 21 comprises a conductor and an insulating sheath coated outside the conductor. The conductor may be oxygen free copper, tin plated copper, silver plated copper, or the like. Optionally, in this embodiment, the conductor is formed by twisting a plurality of five types of silver-plated copper. The silver-plated copper has better conductivity, can effectively reduce the heating efficiency of the conductor, and also has weldability so as to be beneficial to welding the detection equipment and the first wire core 21 when externally connecting the detection equipment. The silver-plated copper also has better corrosion resistance, and avoids seawater corrosion of a conductor at the position of external detection equipment. The insulating sheath can be made of polyolefin materials, and the insulating property is good.

The material around covering 23 can be for the compatible band around the package with the material that blocks water, can make data unit 230 comparatively round, convenient turnover, and this material is better around the package with first water-blocking layer and the bonding of second water-blocking layer, has avoided the permeable possibility in separation clearance.

The interval sets up between each first sinle silk 21 and the filler core, and second water blocking layer 22 is filled in the clearance around covering 23 for every first sinle silk 21 and the periphery of filler core all wrap up the material that blocks water, in order to form the protection to each first sinle silk 21. When the external detection equipment is further facilitated, the first wire cores 21 are dispersed, the material of the second water-blocking layer 22 can be the same as that of the first water-blocking layer 60, and the embodiment is not limited.

According to the power requirement of the detection device, the power supply unit 210 may also include four first cores 21. And the four first cores 21 include two large cores with large diameters and two small cores with small diameters, which are sequentially arranged along the circumferential direction of the power supply unit 210 at intervals. Around covering 23 encloses outside two big sinle silks and two little sinle silks, and around the clearance intussuseption between each first sinle silk 21 in the covering 23 and fill second water blocking layer 22. Because the diameters of the large wire core and the small wire core are different, the gap at the central part of the power supply unit 210 is smaller, and a filling core is not required to be arranged. The material and structure of the large core and the small core are similar to those of the first core 21 in the data unit 230, and are not described again in this embodiment.

It is understood that the structure of the ground unit 220 may be similar to the structure of the data unit 230 and the power supply unit 210.

In some alternative embodiments, the grounding unit 220 may not be provided with the second water blocking layer 22. Illustratively, the grounding unit 220 includes a second wire core 25, a semiconductive layer 26, and a third protective layer 27. The structure and the function of the first wire core 21 are similar to those of the above embodiments, and are not described again in this embodiment.

The semiconductive layer 26 may be made of semiconductive polyolefin, so that the electric field distribution inside and outside the second core 25 is relatively uniform.

The third protection layer 27 may be made of polypropylene having low toughness, and may be extruded outside the semiconductive layer 26 so as not to adhere to the semiconductive layer 26. When the detection device is externally connected, the third protection layer 27 can be easily broken and peeled off to expose the inner semi-conductive layer 26 and the second wire core 25.

Of course, when the outer diameter of the grounding unit 220 is significantly smaller than the outer diameters of the data unit 230 and the power supply unit 210, the thickness of the third protection layer 27 in the grounding unit 220 may be increased and the filling function may be performed, so that the outer diameters of the data unit 230, the power supply unit 210 and the grounding unit 220 are approximately the same or equal. Thus, the marine streamer 1 has a round appearance and is easy to manufacture and mold.

In some alternative embodiments, the first protective layer 30 is a foam. For example, foamed polyurethane, so that a honeycomb or cellular structure may be formed in the first protective layer 30.

For the first protective layer 30 with the same thickness, the foamed first protective layer 30 has a smaller weight, and the specific gravity (ratio of weight to volume) of the streamer 1 is reduced, for example, smaller than the density of water, so that the gravity of the streamer 1 is close to the buoyancy of the streamer 1, and the streamer 1 is at the same elevation as possible, and is prevented from being pulled by the detection equipment. Meanwhile, the stress of the bearing unit 10 is reduced, and the service life is longer.

The specific gravity of the streamer 1 can be reduced more by increasing the thickness of the first protective layer 30 during the formation of the streamer 1, depending on the application requirements. For example, when the first shielding layer 30 is at a predetermined thickness, the marine streamer 1 may be made floating for surface towing.

In some alternative embodiments, the density of the first protective layer 30 is less than or equal to 0.7g/cm³。

In some alternative embodiments, the force-bearing unit 10 includes a fiber bundle 11 and a fourth protective layer 12 surrounding the fiber bundle 11, and the fourth protective layer 12 is fixedly connected to the first water-resistant layer 60.

The fiber bundle 11 may be made of high-strength fibers such as aramid fibers, PBO (Poly-p-phenylene benzobisoxazole) fibers, and the like, and has high tensile strength. Meanwhile, the fiber bundle 11 is light in weight, and compared with a bearing unit made of a steel wire material in the prior art, the bearing unit made of the steel wire material is large in self weight and difficult to realize large-length production, the bearing unit 10 in the embodiment can reduce the weight of the marine streamer 1 and realize larger-length production, and meanwhile, the bending performance of the fiber bundle is better.

The fourth protective layer 12 may be made of a material having waterproof and easy-to-vulcanize properties, such as polyurethane, vulcanized rubber, or polyester rubber (TPEE), so as to prevent the fiber bundle 11 from being wetted. Meanwhile, when the fiber bundle 11 of the marine streamer 1 is connected with the bearing head, vulcanization sealing can be performed at the connection position to prevent water from entering the connection position.

Specifically, the forming process of the force bearing unit 10 is as follows: the fibres are twisted under tension into a round bundle 11, bundled with two fibre threads and finally extruded synchronously with a fourth protective layer 12. The twisting, bundling and extrusion are all done simultaneously with the fibers under tension, resulting in a higher strength and better roundness of the fiber bundle 11.

During exploration, a plurality of marine streamers 1 are usually provided, and torsion of the marine streamers 1 or fitting, winding and the like between two adjacent marine streamers 1 may occur. The twisting of the marine streamers 1 may cause the marine streamers 1 to break, the joint winding between two adjacent marine streamers 1, etc., may increase the crosstalk between two adjacent marine streamers 1 to some extent, the attenuation of the exploration signal, etc.

In some alternative embodiments, the outer wall surface of the second protective layer 50 is provided with a plurality of protective protrusions 51, the plurality of protective protrusions 51 are arranged at intervals along the circumference of the second protective layer 50, and each protective protrusion 51 extends along the length direction of the marine streamer 1.

Thus, even if two marine streamers 1 are wound or attached, the two marine streamers 1 are contacted through the tips of the protection protrusions 51, and the distance between the two marine streamers 1 is the protrusion height of the protection protrusions 51, so that crosstalk interference between the two marine streamers 1 is reduced.

The end of the protective protrusion 51 facing away from the streamer 1 may be rounded to avoid scratching or puncturing the streamer 1 when the protective protrusion 51 comes into contact with the streamer 1.

Meanwhile, the protection protrusion 51 does not significantly increase the weight of the marine streamer 1, does not affect the sound transmission performance of the marine streamer 1, and is low in cost. Furthermore, the protection protrusion 51 can also prevent abrasion, for example, the marine streamer 1 will wear preferentially with the protruding protection protrusion 51 during towing, and the second protection layer 50 can be protected. And when the marine streamer 1 is twisted, the protection protrusion 51 is also twisted correspondingly, so that a tester can observe the twisting degree of the marine streamer 1 easily, so that the marine streamer 1 can be rotated in time to avoid the damage of the marine streamer 1.

The height of the guard projection 51 may be set as desired. In some alternative embodiments, the circumferential spacing between two adjacent protective protrusions 51 is greater than the protrusion width of the protective protrusions 51.

Thus, even if the protection protrusions 51 between two marine streamers 1 are inserted into each other, a gap is still formed between two adjacent protection protrusions 51, and crosstalk between the two marine streamers 1 is reduced.

The embodiments or implementation modes in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.

In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A marine towrope is characterized by comprising a force bearing unit, a plurality of wire core units, a first protective layer, a fiber layer and a second protective layer which are sequentially arranged from inside to outside, wherein the plurality of wire core units are distributed at intervals in the circumferential direction of the force bearing unit;

and a first water-resistant layer is filled between the first protective layer and the force bearing unit and fixedly connected with the first protective layer.

2. The streamer of claim 1, wherein the first water barrier and the first protective layer are adhesively secured during the solidification process.

3. The marine streamer of claim 1, wherein any two adjacent core units are spaced circumferentially along the streamer, and the messenger units, the core units and the first armor layers are spaced radially along the streamer.

4. The marine streamer of claim 1, wherein the core units comprise power supply units and data units for conveying signals.

5. The marine streamer of claim 4, wherein the core unit comprises a first core, a second water-resistant layer and a wrapping layer which are arranged in sequence from inside to outside; and the inner side and the outer side of the wrapping layer are fixedly connected with the second waterproof layer and the first waterproof layer respectively.

6. The marine streamer of claim 1, wherein the core unit comprises a ground unit.

7. The marine streamer of claim 6, wherein the ground unit comprises a second core, a semi-conductive layer and a third protective layer arranged in sequence from the inside out.

8. The marine streamer of claim 1, wherein the first protective layer is a foam.

9. The marine streamer of claim 1, wherein the density of the first protective layer is less than or equal to 0.7g/cm³。

10. The marine streamer of claim 1, wherein the messenger units comprise a fiber bundle and a fourth protective covering surrounding the fiber bundle, the fourth protective covering being fixedly attached to the first layer of water-blocking material.

11. The marine streamer of any one of claims 1-10, wherein the plurality of core units further comprises a fiber optic communications unit.

12. The streamer of any one of claims 1-10, wherein the outer wall surface of the second protective layer is provided with a plurality of protective projections spaced circumferentially around the second protective layer, each of the protective projections extending along the length of the streamer.

13. The marine streamer of claim 12, wherein the circumferential spacing of adjacent two of the guard projections is greater than the projection width of the guard projections.