WO2019210693A1

WO2019210693A1 - Solid towline having good dragging performance for marine seismic exploration

Info

Publication number: WO2019210693A1
Application number: PCT/CN2018/121695
Authority: WO
Inventors: 隋明辉; 苑国梁; 黄永婷
Original assignee: 高骏
Priority date: 2018-05-04
Filing date: 2018-12-18
Publication date: 2019-11-07
Also published as: CN108447591A

Abstract

Disclosed is a solid towline having good dragging performance for marine seismic exploration. The solid towline is mainly characterized in that: the solid towline comprises a main cable, hydrophones, buoyancy sleeves, and an outer sheath. The hydrophones are fixedly arranged on the main cable at equal intervals. The hydrophones are electrically connected to corresponding cores in the main cable. The buoyancy sleeves are made of a foamed polyethylene material, and foamed polyethylene is extruded on the main cable. The main cable comprises transmission cores, a tensile fiber layer, and a conductor layer. The tensile fiber layer is formed by weaving aramid yarn and/or polyester yarn outside the transmission cores. The conductor layer comprises a set of power lines and a set of signal lines. The power lines and the signal lines are sequentially arranged outside the tensile fiber layer at equal intervals along the circumferential direction of the main cable to form the corresponding conductor layer. The buoyancy sleeves are fixedly arranged on the main cable at equal intervals, and are located between two adjacent hydrophones. The outer sheath is made of a thermoplastic polyurethane elastomer rubber material. The outer sheath is extruded outside the hydrophones, positioning ends, and the buoyancy sleeves, and is seamlessly bonded to the hydrophones.

Description

Solid towline for marine seismic exploration with good drag

Technical field

The invention relates to the technical field of power cables, in particular to a solid streamer for use in a marine seismic exploration system.

Background technique

With the increase of the Earth's population and the improvement of the quality of human life, more natural resources are needed to meet the needs of human production and living, which leads to the overexploitation of land resources, the energy crisis has become increasingly prominent, and the energy problem has become twenty. One of the core issues of the first century. The ocean covers two-thirds of the Earth's area, which contains a large amount of solid mineral resources and petroleum resources. It will be the largest resource provider for human survival and development. The grim survival situation forces mankind to turn their attention to the ocean. However, to date, human exploration of the ocean has just begun, and the understanding of the interior and bottom of the ocean remains at an early stage. There are many limitations in the process of understanding and developing the ocean. The complex and varied marine environment and the development level of science and technology are the main factors. Marine seismic exploration technology is of great significance in the modern research and development of advanced marine technologies.

A typical marine seismic exploration streamer system can be divided into two parts: onboard equipment and offshore equipment. The equipment on board includes navigation system, source control system, waterbird control system, streamer power supply system, data acquisition master control system, real-time data storage and Display system, etc. Offshore equipment includes seismic sources, waterfowl and solid streamers. A typical marine solid streamer is internally embedded with a hydrophone (a transducer that converts an acoustic signal into an electrical signal for receiving an acoustic signal in the water, called a receiving transducer, also commonly referred to as a hydrophone), and passes the test. The sound signal acquires seabed geological information for oil and gas exploration. The structure of the traditional marine seismic exploration streamer is composed of a polyurethane jacket, an internal streamer skeleton, a hydrophone, a collecting circuit, etc. The air gap inside the streamer is filled with aviation kerosene to adjust the buoyancy of the streamer and ensure the seismic pressure signal in the streamer. Internal low reflection and low loss propagation for fidelity acquisition of seismic signals. However, in the case of offshore liquid towline, oil leakage caused by damage to the towline casing often causes marine environmental pollution, and seawater entering the streamer may cause leakage, corrosion and other damage, and it is impossible to continue offshore operations and reduce the sea. Work efficiency.

Summary of the invention

The object of the present invention is to provide a solid streamer for marine seismic exploration which has a simple structure, is advantageous for protecting the environment and has good drag.

The basic technical solution for achieving the object of the present invention is: a solid towline for marine seismic exploration with better drag and tear, and its structural features include: main cable, hydrophone, buoyancy sleeve and outer sheath. The hydrophone is fixedly disposed on the main cable at equal intervals. The main cable includes a transmission core, a tensile fiber layer, and a wire layer. The tensile fiber layer is made of aramid yarn and/or polyester yarn woven outside the transmission wire core. The wire layer includes a set of power lines and a set of signal lines. The power line and the signal line are disposed at equal intervals in the circumferential direction of the main cable outside the tensile fiber layer to form a corresponding wire layer. The hydrophone is electrically connected to the corresponding core in the main cable. The buoyancy sleeve is made of a foamed polyethylene material that is extruded over the main cable. The buoyancy sleeves are fixedly disposed on the main cable at equal intervals and are located between two adjacent hydrophones. The outer sheath is made of a thermoplastic polyurethane elastomer rubber material, and the outer sheath is extruded outside the hydrophone, the positioning end and the buoyancy sleeve, and is seamlessly bonded to the hydrophone.

The technical solution based on the above basic technical solutions is: also includes a plug. The plug is an injection molded one. The plug is generally in the shape of a circular cylinder, and the diameter of the central through hole is the same as the outer diameter of the main cable. The lower portion of the plug is provided with a slit extending through the inner and outer sides thereof in the front and rear direction, and the surface of the cut passes through the axis of the plug. The upper side of the plug is provided with a terminal slot for accommodating the wiring portion of the hydrophone and the core in the main cable. The plug is sleeved on the main cable, and each plug has a plug on the left and right sides, and the plug slot of the plug faces the hydrophone. The plug is located between the hydrophone and the buoyancy sleeve. The outer sheath is extruded outside the hydrophone, plug and buoyancy sleeve and is seamlessly bonded to the hydrophone.

The technical solution based on the above respective technical solutions is: further comprising a positioning end. The positioning tip is injection molded between the buoyancy sleeve and the hydrophone to position the hydrophone to prevent the hydrophone from changing in the axial position of the main cable. The outer sheath is extruded outside the hydrophone, the positioning end and the buoyancy sleeve, and is seamlessly bonded to the hydrophone.

The technical solution based on the above respective technical solutions is: further comprising a positioning end. The positioning end is injection molded between the buoyancy sleeve and the plug for positioning the hydrophone to prevent the hydrophone from changing in the axial position of the main cable. The outer sheath is extruded outside the hydrophone, the plug, the positioning end and the buoyancy sleeve, and is seamlessly bonded to the hydrophone.

The technical solution based on the above respective technical solutions is: further comprising a buffer sleeve. The buffer sleeve is an injection molded one. The buffer sleeve is generally in the shape of a circular cylinder, and the diameter of the central through hole is the same as the outer diameter of the main cable. The lower portion of the buffer sleeve is provided with a slit extending through the inner and outer sides thereof in the front and rear direction, and the surface of the slit passes through the axis of the buffer sleeve, and the buffer sleeve On the main cable. A buffer sleeve is provided on each of the left and right sides of each hydrophone. The buffer sleeve is located between the positioning end and the plug. The outer sheath is extruded outside the hydrophone, the plug, the buffer sleeve, the positioning end and the buoyancy sleeve, and is seamlessly bonded to the hydrophone.

The technical solution based on the respective technical solutions described above is that the main cable further includes a first sheath layer and a second sheath layer. The first jacket layer is extruded outside the tensile fiber layer and the first jacket layer is made of a polyethylene material. The wire layer includes a set of power lines and a set of signal lines. The power line and the signal line are disposed at equal intervals in the circumferential direction of the main cable outside the first sheath layer to form a corresponding wire layer. Silicone gel is filled between the power and signal wires and the main cable. The second sheath layer is made of a thermoplastic polyurethane elastomer rubber material, and the second sheath layer is extruded outside the wire layer.

The technical solution based on the above respective technical solutions is that the transmission wire core comprises four transmission lines and a transmission core sheath. The four transmission lines have the same structure, including transmission line conductors and transmission line insulation. The transmission line conductor is made of a number of tinned soft round copper wires by a stranding process. The transmission line insulation is made of a thermoplastic polyester elastomer, and the transmission line insulation is extruded outside the transmission line conductor. 4 transmission lines are twisted and combined, the transmission core sheath is extruded outside the 4 transmission lines, and the transmission core sheath is made of thermoplastic polyurethane elastomer rubber material. The transmission core has a diameter of 1.5 mm to 4.0 mm.

The technical solution based on the above respective technical solutions is as follows: the power cable has four, and the four power cables have the same structure, and each includes a power line conductor and a power line insulation layer. The power line conductor is made of a number of tinned soft round copper wires by a stranding process, and the power line conductor has a diameter of 1.0 mm to 4.0 mm. The power line insulation layer is made of a thermoplastic polyester elastomer, and the power line insulation layer is extruded outside the power line conductor, and the power line insulation layer has a thickness of 0.3 mm to 0.6 mm. The power line insulation is marked with the appropriate color.

The signal lines have 10 to 14. Each signal line has the same structure, and includes a signal line core and a signal line sheath. There are 2 signal wire cores, and 2 signal wire cores are twisted and set. The two signal line cores have the same structure, and both include a signal line core conductor and a signal line core insulation layer. The signal wire core conductor is made of a plurality of tinned soft round copper wires by a stranding process, and the signal wire core conductor has a diameter of 0.6 mm to 1.0 mm. The signal wire core insulating layer is made of a thermoplastic polyester elastomer, and the signal wire core insulating layer is extruded outside the signal wire core conductor, and the signal wire core insulating layer has a thickness of 0.1 mm to 0.4 mm. The signal wire core insulation is marked with different colors. The signal line jacket is extruded from polyethylene outside the signal line fill layer. The number of signal lines of the main cable is equal to the number of signal lines to be electrically connected to the hydrophone or the number of signal lines of the main cable is greater than the number of signal lines required for the hydrophone to be electrically connected to one to two.

The technical solution based on the respective technical solutions described above is that the main cable further includes a fourth braid layer and a third sheath layer. The fourth woven layer is woven from the aramid yarn outside the second sheath layer and has a weaving density of 30%. The third jacket layer is made of a thermoplastic polyurethane elastomer rubber material, and the third jacket layer is extruded outside the fourth braid layer.

The technical solution based on the respective technical solutions described above is that the tensile fiber layer comprises a first woven layer, a second woven layer and a third woven layer. The first woven layer is woven from the aramid yarn obliquely outside the transmission core, the second woven layer is 100% woven from the polyester woven fabric outside the first woven layer, and the third woven layer is woven from the aramid woven fabric outside the second woven layer. .

The invention has positive effects:

(1) The simple towed solid tow cable for marine seismic exploration of the present invention has a simple structure, greatly reduces the cost of the product, generates buoyancy through the foamed polyethylene, and causes the cable to float in the seawater, and assists in control. The position where the streamer hovers in the seawater avoids the problem of marine environment pollution caused by the damage of the streamer casing, which is conducive to the protection of the environment. At the same time, the whole streamer has a uniform gravity and the balance of the streamer is easy to adjust. The outer sheath is made of thermoplastic polyurethane elastomer rubber (TPU) material and seamlessly bonded to the hydrophone. It not only protects the hydrophone, but also has no effect on seismic wave transmission. The data acquisition accuracy is high. This makes the reliability of the streamer greatly improved. The outer jacket also has the ability to withstand crushing and impact resistance, puncture resistance and load distribution.

(2) The solid towline for marine seismic exploration with better dragability of the present invention is provided with a tensile fiber layer, and the tensile fiber layer is provided with a first woven layer, a second woven layer and a third woven layer. The first woven layer is knitted by the aramid yarn obliquely wrapped outside the transmission wire core, the second woven layer is woven by the polyester yarn outside the first woven layer, and the third woven layer is woven by the aramid yarn to the outside of the second woven layer. The tensile strength of the streamer is greatly improved, and the elongation of the tension fiber (aramid yarn and polyester yarn) is ≤0.3% from 4kN to 22kN, which is favorable for dragging and dragging.

(3) The power line conductor of the power line of the conductor layer of the solid streamer for marine seismic exploration of the present invention is made of tinned soft round copper wire by a stranding process, and has good flexibility and reliability. High in sex and high in tensile strength. DC resistance ≤5.31 Ω/km at 20 °C. The power line insulation layer is made of thermoplastic polyester elastomer (TPEE) with a voltage rating of 600V and a temperature change of -55°C to 150°C.

(4) The signal line of the signal line of the conductor layer of the conductor layer of the solid streamer for marine seismic exploration of the present invention is preferably a stranded conductor made of a plurality of tinned soft round copper wires. When the signal line moves, the flexibility is good, and multiple stranding can disperse the defects, the reliability is improved, and the combined breaking force of the strand is larger than that of the single wire of the same cross section, and the DC resistance is ≤49.5 Ω at 20 °C. Km. The signal wire core insulation layer is made of thermoplastic polyester elastomer (TPEE) with a voltage rating of 600V and a temperature change of -55°C to 150°C.

(5) The silicon wire gel is filled between the power supply lines and the signal lines of the wire layer of the solid streamer for marine seismic exploration with good dragability, and has water resistance, ozone resistance, weather resistance, moisture resistance, and no The advantages of poisonous and odorless, low line shrinkage, etc. improve the service life of the cable, and the cable is safe to use, which is beneficial to drag and drop.

(6) The second sheath layer of the solid streamer for marine seismic exploration with better dragability of the present invention is made of thermoplastic polyurethane elastomer rubber (TPU) material, and has good wear resistance, ozone resistance and resistance. Low temperature, oil resistance and chemical resistance, excellent environmental resistance, high hardness, high strength and good elasticity, which is conducive to dragging operations and protect cables from impact damage.

(7) The fourth braid layer of the solid streamer for marine seismic exploration with better dragability of the present invention is woven from the aramid yarn outside the second sheath layer, and has the advantages of light weight, high strength, dimensional stability, and low shrinkage. It has the advantages of puncture resistance, abrasion resistance, heat resistance, chemical resistance and mechanical properties.

(8) The third sheath layer of the solid streamer for marine seismic exploration with better dragability of the present invention is made of thermoplastic polyurethane elastomer rubber (TPU) material, and has excellent wear resistance and excellent ozone resistance. It has the advantages of high hardness, high strength, good elasticity, low temperature resistance, oil resistance, chemical resistance and excellent environmental resistance, which is beneficial to the dragging operation and protects the cable from being damaged by impact.

(9) The hydrophone of the solid streamer for marine seismic exploration with good dragability of the present invention is equally spaced on the main cable, and can uniformly detect the seabed signal, which is beneficial to improve data accuracy.

(10) The signal line of the solid streamer for marine seismic exploration with better drag and drop performance of the present invention is provided with spare, which reduces the risk of the entire streamer being scrapped due to the damage of the signal line, and reduces the cost of replacing the streamer.

(11) The solid towline for marine seismic exploration with better dragability of the present invention is provided with a plug having a terminal groove for accommodating a wiring portion of a hydrophone and a signal line in the main cable. It can protect the joint part from being crushed and destroyed.

(12) The solid towed cable for marine seismic exploration with better dragging performance of the present invention is provided with a buffer sleeve, and the buffer sleeve is made of silicone rubber material, and has good elasticity, so as to avoid the dragging of the streamer during the dragging process. Squeeze damage of the hydrophone.

(13) The solid towed cable for marine seismic exploration with better dragging performance of the present invention is provided with a positioning end. After the hydrophone is installed, the positioning end is injection-molded at both ends, and the hydrophone can be accurately positioned to ensure water. The distance between the listeners is the same, and the position of the hydrophone in the axial direction of the main cable is prevented from changing during the use of the drag, resulting in a decrease in data accuracy.

DRAWINGS

1 is a schematic structural view of a hydrophone portion of a solid streamer for marine seismic exploration with better dragging performance according to the present invention;

2 is a schematic structural view of a buoyancy sleeve portion of a solid streamer for marine seismic exploration with better dragging according to the present invention;

3 is a schematic axial structural view of a solid streamer for marine seismic exploration with better dragging performance according to the present invention;

4 is a schematic enlarged structural view of the transmission core of FIG. 1;

FIG. 5 is an enlarged schematic structural view of a signal line of the wire layer of FIG. 1; FIG.

Figure 6 is a schematic enlarged view of the plug.

The markings in the above figures are as follows:

Main cable 1, transmission core 1-1,

Tensile fiber layer 1-2, first woven layer 1-21, second woven layer 1-22, third woven layer 1-23,

First sheath layer 1-3,

Wire layer 1-4,

Power cord 1-41, power cord conductor 1-41-1, power cord insulation 1-41-2,

Signal line 1-42, signal line core 1-42-1, signal line core conductor 1-42-1a, signal line core insulation layer 1-42-1b,

Signal cable sheath 1-42-2,

Second sheath layer 1-5, fourth braid layer 1-6, third sheath layer 1-7,

Hydrophone 2, plug 3, buffer sleeve 4, positioning end 5,

Buoyancy sleeve 6,

Outer sheath 7.

detailed description

(Example 1)

The description of the present invention is described in terms of the specific orientation shown in FIG. 1, and the up, down, left, and right directions shown in FIG. 1 are also described in the up, down, left, and right directions.

Referring to FIG. 1 to FIG. 6 , the solid towline for marine seismic exploration with better dragging performance of the present invention comprises a main cable 1 , a hydrophone 2 , a plug 3 , a buffer sleeve 4 , a positioning end 5 , and a buoyancy sleeve 6 . And outer sheath 7.

1 to 3, the main cable 1 includes a transmission core 1-1, a tensile fiber layer 1-2, a first sheath layer 1-3, a wire layer 1-4, a second sheath layer 1-5, and a first Four braid layers 1-6 and a third sheath layer 1-7.

1, 2 and 4, the transmission core 1-1 includes four transmission lines 1-1a and a transmission core sheath 1-1b. The four transmission lines 1-1a have the same structure and each include a transmission line conductor 1-1a-1 and a transmission line insulation 1-1a-2. The transmission line conductor 1-1a-1 is made of a plurality of tinned soft round copper wires by a stranding process. The transmission line insulation 1-1a-2 is made of a thermoplastic polyester elastomer (TPEE), and the transmission line insulation 1-1a-2 is extruded outside the transmission line conductor 1-1a-1. Four transmission lines 1-1a are twisted and combined, the transmission core sheath 1-1b is extruded outside the four transmission lines 1-1a, and the transmission core sheath 1-1b is made of thermoplastic polyurethane elastomer rubber (TPU) material. The transmission core 1-1 has a diameter of 1.5 mm to 4.0 mm, which is 3.5 mm in this embodiment.

Referring to Figures 1 and 2, the tensile fiber layer 1-2 is formed by braiding aramid yarn and/or polyester yarn outside the core of the transmission wire. The tensile fiber layer 1-2 includes a first woven layer 1-21, a second woven layer 1-22, and a third woven layer 1-23. The first woven layer 1-21 is woven from the aramid yarn obliquely outside the transmission core 1-1, and the second woven layer 1-22 is woven from the polyester woven fabric 100% outside the first woven layer 1-21, and the third woven layer 1 -23 is woven from aramid woven bag outside the second woven layer 1-22.

1 and 2, the first sheath layer 1-3 is extruded outside the tensile fiber layer 1-2, and the first sheath layer 1-3 is made of a polyethylene material.

1, 2 and 5, the wire layers 1-4 include a set of power lines 1-41 and a set of signal lines 1-42. There are four sets of power supply lines 1-41, and the four power supply lines 1-41 have the same structure, and each includes a power line conductor 1-41-1 and a power line insulation layer 1-41-2. The power line conductor 1-41-1 is made of a plurality of tinned soft round copper wires by a stranding process, and the power line conductor 1-41-1 has a diameter of 1.0 mm to 4.0 mm, which is 2.3 mm in this embodiment. The power line insulation layer 1-41-2 is made of thermoplastic polyester elastomer (TPEE), and the power line insulation layer 1-41-2 is extruded outside the power line conductor 1-41-1, and the power line insulation layer 1-41 The thickness of -2 is from 0.3 mm to 0.6 mm, which is 0.4 mm in this embodiment. The power line insulation layer 1-41-2 is marked with a corresponding color.

Referring to FIG. 1, FIG. 2 and FIG. 5, there are 10 to 14 sets of signal lines 1-42, 12 in this embodiment, and 12 signal lines 1-42 have the same structure, including signal line cores 1-42. -1 and signal line sheath 1-42-2. There are two signal wire cores 1-42-1, and two signal wire cores 1-42-1 are twisted and set. The two signal line cores 1-42-1 have the same structure, and each includes a signal line core conductor 1-42-1a and a signal line core insulating layer 1-42-1b. The signal wire core conductor 1-42-1a is made of a plurality of tinned soft round copper wires by a stranding process, and the signal wire core conductor 1-42-1a has a diameter of 0.6 mm to 1.0 mm, which is 0.8 in this embodiment. Millimeter. The signal line core insulating layer 1-42-1b is made of a thermoplastic polyester elastomer (TPEE), and the signal line core insulating layer 1-42-1b is extruded outside the signal line core conductor 1-42-1a, and the signal The thickness of the wire core insulating layer 1-42-1b is 0.1 mm to 0.4 mm, which is 0.25 mm in this embodiment. The signal wire core insulation is marked with different colors. The signal line sheath 1-42-2 is extruded from polyethylene outside the signal line filling layer 1-42-2.

1 and 2, a set of power supply lines 1-41 and a set of signal lines 1-42 are disposed at equal intervals in the circumferential direction of the main cable 1 outside the first sheath layer 1-3 to form a corresponding wire layer 1 -4. A set of power lines 1-41 and a set of signal lines 1-42 and the main cable 1 are filled with a silicone gel. The second sheath layer 1-5 is made of a thermoplastic polyurethane elastomer rubber (TPU) material, and the second sheath layer 1-5 is extruded outside the wire layers 1-4. The fourth braid layer 1-6 is woven from the aramid yarn outside the second sheath layer 1-5 with a weaving density of 30%. The third sheath layer 1-7 is made of a thermoplastic polyurethane elastomer rubber (TPU) material, and the third sheath layer 1-7 is extruded outside the fourth braid layer 1-6.

2 and 3, the buoyancy sleeve 6 is made of a foamed polyethylene material, and the foamed polyethylene is extruded on the main cable 1, and the outer diameter of the buoyancy sleeve 6 is the same as the outer diameter of the hydrophone. When the buoyancy sleeve 6 is produced, it is first wrapped around the main cable 1, and then the corresponding portion of the main cable 1 of the hydrophone 2, the plug 3, the buffer sleeve 4 and the positioning end 5 is cut off correspondingly. The buoyancy sleeve is 6 parts.

Referring to FIG. 1 and FIG. 3, the hydrophone 2 is a haval fastening structure, and the hydrophone 2 is fixedly disposed on the main cable 1 at an equal interval in the axial direction of the main cable 1. The hydrophone 2 is electrically connected to a corresponding signal line in the main cable 1. In this embodiment, the number of signal lines 1-42 of the main cable 1 is equal to the number of signal lines 1-42 to be electrically connected to the hydrophone 2. Or the number of signal lines 1-42 of the main cable 1 is larger than the number of signal lines 1-42 to be electrically connected to the hydrophone 2, which is two in the embodiment, and the two signal lines 1-42 Used as a spare line.

Referring to Figures 3 and 6, the plug 3 is an integrally molded part, and the embodiment is made of a silicone rubber material. The plug 3 has a circular column shape as a whole, and the diameter of the central through hole is the same as the outer diameter of the main cable 1. The lower portion of the plug 3 is provided with a slit extending through the inner and outer sides thereof in the front and rear direction, and the surface of the plug passes through the plug 3 Axis. The upper left side (or the right side) of the plug 3 is provided with a terminal groove 3-1 which can accommodate the wiring portion of the hydrophone 2 and the signal line in the main cable 1. The plugs 3 are sleeved on the main cable 1, and each of the hydrophones 2 is provided with a plug 3 on each of the left and right sides, and the terminal slot 3-1 of the plug 3 faces the hydrophone 2.

Referring to Fig. 3, the buffer sleeve 4 is an integrally molded part, and the embodiment is made of a silicone rubber material. The buffer sleeve 4 has a circular ring shape as a whole, and the diameter of the central through hole is the same as the outer diameter of the main cable 1. The lower portion of the buffer sleeve 4 is provided with a slit extending through the inner and outer sides thereof in the front and rear direction, and the surface of the slit passes through the buffer sleeve 4. The axis, the buffer sleeve 4 is sleeved on the main cable 1. A buffer sleeve 4 is disposed outside each of the plugs 3 on the left and right sides of each hydrophone 2. The positioning end 5 is injection molded on the main cable 1 with an ABS material between the buffer sleeve 4 and the buoyancy sleeve 6 on the corresponding side.

1 to 3, the outer sheath 7 is made of thermoplastic polyurethane elastomer rubber (TPU) material, and the outer sheath 7 is extruded in the hydrophone 2, the plug 3, the buffer sleeve 4, the positioning end 5 and the buoyancy. The outer portion of the sleeve 6 is seamlessly bonded to the hydrophone 2. The outer sheath 7 has a thickness of 2.5 mm to 5 mm, which is 3.5 mm in this embodiment.

The above embodiments are merely illustrative of the invention, and are not intended to limit the invention, and various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the invention. Corresponding modifications can also be made according to the inspiration of the above embodiments, and therefore all equivalent technical solutions should be included in the patent protection scope of the present invention.

Claims

The utility model relates to a solid streamer for marine seismic exploration with better dragging characteristics, which comprises: a main cable, a hydrophone, a buoyancy sleeve and an outer sheath; the hydrophone is fixedly arranged on the main cable at intervals; The cable comprises a transmission core, a tensile fiber layer and a wire layer; the tensile fiber layer is woven from the aramid wire and/or the polyester wire outside the transmission wire core; the wire layer comprises a set of power lines and a set of signal lines; the power line And the signal lines are arranged at equal intervals along the circumferential direction of the main cable to form a corresponding wire layer outside the tension fiber layer; the hydrophone is electrically connected with the corresponding wire core in the main cable; the buoyancy sleeve is made of foamed polyethylene material. The foamed polyethylene is extruded on the main cable; the buoyancy sleeve is fixedly disposed on the main cable at an interval and is located between two adjacent hydrophones; the outer sheath is made of a thermoplastic polyurethane elastomer rubber material. The outer sheath is extruded outside the hydrophone, the positioning end and the buoyancy sleeve, and is seamlessly bonded to the hydrophone.
The solid streamer for marine seismic exploration with better dragability according to claim 1, characterized in that it further comprises a plug; the plug is an injection-molded one; the plug is generally in the shape of a circular cylinder, and the diameter of the central through hole is The outer diameter of the main cable is the same as that of the main cable. The lower part of the plug is provided with a slit extending through the inner and outer sides of the plug. The surface of the plug passes through the axis of the plug; the upper side of the plug is provided with a terminal slot to accommodate the water. The wiring part of the core of the main cable and the main cable; the plug is sleeved on the main cable, and each plug has a plug on the left and right sides, and the plug slot of the plug faces the hydrophone; the plug is located in the water Between the hearing device and the buoyancy sleeve; the outer sheath is extruded outside the hydrophone, the plug and the buoyancy sleeve, and is seamlessly bonded to the hydrophone.
The solid streamer for marine seismic exploration according to claim 1, further comprising: a positioning end; the positioning end is injection molded between the buoyancy sleeve and the hydrophone for listening to water The device is positioned to prevent the hydrophone from changing in the axial position of the main cable; the outer sheath is extruded outside the hydrophone, the positioning end and the buoyancy sleeve, and is seamlessly bonded to the hydrophone.
The solid streamer for marine seismic exploration according to claim 2, further comprising: a positioning end; the positioning end is injection molded between the buoyancy sleeve and the plug for use in the hydrophone Positioning to prevent the hydrophone from changing in the axial position of the main cable; the outer sheath is extruded outside the hydrophone, the plug, the positioning end and the buoyancy sleeve, and is seamlessly bonded to the hydrophone .
The solid streamer for marine seismic exploration according to claim 4, further comprising: a buffer sleeve; the buffer sleeve is an integrally molded part; the buffer sleeve is generally in the shape of a circular cylinder, and the diameter of the central through hole is The outer diameter of the main cable is the same as that of the main cable. The lower part of the buffer sleeve is provided with a slit extending through the inner and outer sides thereof. The surface of the slit passes through the axis of the buffer sleeve, and the buffer sleeve is sleeved on the main cable; One buffer sleeve is arranged on each side; the buffer sleeve is located between the positioning end and the plug; the outer sheath is squeezed outside the hydrophone, the plug, the buffer sleeve, the positioning end and the buoyancy sleeve, and is free from the hydrophone Sewing and bonding.
The solid streamer for marine seismic exploration with better dragability according to any one of claims 1 to 5, wherein the main cable further comprises: a first sheath layer and a second sheath layer; The sleeve layer is extruded outside the tensile fiber layer, the first sheath layer is made of polyethylene material; the wire layer comprises a set of power lines and a set of signal lines; the power line and the signal line are sequentially arranged along the circumference of the main cable; The spacing is disposed outside the first sheath layer to form a corresponding wire layer; the power cable and the signal line are filled with silicone gel between the main cable; the second sheath layer is made of thermoplastic polyurethane elastomer rubber material, second The jacket layer is extruded outside the conductor layer.
The solid streamer for marine seismic exploration according to claim 6, wherein the transmission wire core comprises four transmission lines and a transmission core sheath; the four transmission lines have the same structure, and each comprises a transmission line conductor and a transmission line insulation. The transmission line conductor is made of a plurality of tinned soft round copper wires by a stranding process; the transmission line insulation is made of a thermoplastic polyester elastomer, the transmission line is insulated and extruded outside the transmission line conductor; 4 transmission lines are twisted and synthesized, and the transmission core sheath is extruded. Outside the four transmission lines, the transmission core sheath is made of a thermoplastic polyurethane elastomer rubber material; the transmission core has a diameter of 1.5 mm to 4.0 mm.
The solid streamer for marine seismic exploration according to claim 6, characterized in that: the power cord has four, and the four power cords have the same structure, including the power line conductor and the power line insulation. The power line conductor is made of a plurality of tinned soft round copper wires by a stranding process, and the power line conductor has a diameter of 1.0 mm to 4.0 mm; the power line insulation layer is made of a thermoplastic polyester elastomer, and the power line insulation layer is extruded. Outside the power line conductor, the thickness of the power line insulation layer is 0.3 mm to 0.6 mm; the power line insulation layer is marked with a corresponding color;

The signal lines have 10 to 14; the structure of each signal line is the same, including the signal line core and the signal line sheath; the signal line core has 2, 2 signal line cores are twisted and set; 2 The signal line core has the same structure, and includes a signal line core conductor and a signal line core insulation layer; the signal line core conductor is made of a plurality of tinned soft round copper wires by a stranding process, and the signal line core conductor is The diameter of the signal wire core insulation layer is made of thermoplastic polyester elastomer, the signal wire core insulation layer is extruded outside the signal wire core conductor, and the signal wire core insulation layer has a thickness of 0.1 mm to 0.4 mm; the signal wire core insulation layer is marked with different colors; the signal line sheath is extruded by polyethylene outside the signal line filling layer; the number of signal lines of the main cable is equal to the signal of the electrical connection required by the hydrophone The number of wires or the number of signal wires of the main cable is larger than the number of signal wires required for the hydrophone to be connected 1 to 2.
The solid streamer for marine seismic exploration according to claim 6, wherein the main cable further comprises a fourth braid layer and a third sheath layer; and the fourth braid layer is woven by aramid yarn. Outside the second sheath layer, the weave density is 30%; the third sheath layer is made of a thermoplastic polyurethane elastomer rubber material, and the third sheath layer is extruded outside the fourth braid layer.
The solid streamer for marine seismic exploration according to claim 6, wherein the tensile fiber layer comprises a first woven layer, a second woven layer and a third woven layer; The woven fabric is wrapped outside the transmission core, the second woven layer is 100% woven from the polyester woven layer outside the first woven layer, and the third woven layer is woven from the aramid woven fabric outside the second woven layer.