Offshore seismic exploration acquisition cable

Abstract

The invention belongs to the technical field of offshore oil seismic exploration, and discloses an offshore seismic exploration acquisition cable. Comprising a cable outer sheath, a plurality of hydrophone acquisition and transmission modules located in the cable outer sheath, a plurality of data acquisition and communication modules and a plurality of double-hole supporting bodies, each hydrophone acquisition and transmission module comprises a plurality of hydrophones and an acquisition and transmission module used for controlling the hydrophones, the hydrophones are symmetrically arranged on the two sides of each acquisition and transmission module, and the data acquisition and communication modules are connected with the double-hole supporting bodies. At least one double-hole supporting body is arranged between the hydrophones and the acquisition and transmission modules at equal intervals, at least one hydrophone acquisition and transmission module is symmetrically arranged on the two sides of each data acquisition communication module, and at least one double-hole supporting body is arranged between the adjacent hydrophone acquisition and transmission modules. According to the offshore seismic exploration acquisition cable, the fault rate of towing cable acquisition equipment can be reduced, and the acquisition operation is more efficient.

Description

Technical Field

[0001] The invention relates to the technical field of offshore oil seismic exploration, and in particular to an offshore seismic exploration acquisition cable. Background Art

[0002] At present, the offshore seismic exploration streamer is mainly composed of a leading section, a front elastic section, several sections of acquisition cables, and a tail elastic section, among which the core part is the acquisition cable. In the existing acquisition cables, an offshore streamer seismic exploration acquisition device is usually hung on the cable sheath of the acquisition cable to measure the cable's underwater posture, depth position, motion state and other data.

[0003] However, due to the complex marine environment, large fluctuations in water flow and temperature, severe corrosion of equipment by seawater, and damage to equipment by marine organisms, the collection operation will be seriously interfered with. These factors can easily cause water to enter the external collection equipment, resulting in inaccurate measurement values ​​or even damage to the equipment, making it impossible to measure. In addition, the external collection equipment usually has a complex mechanical structure, which increases the instability of the equipment and reduces the operating efficiency of the geophysical prospecting vessel. Summary of the invention

[0004] In order to reduce the failure rate of the towed cable acquisition equipment and make the acquisition operation more efficient, the present invention proposes an offshore seismic exploration acquisition cable.

[0005] The offshore seismic exploration and acquisition cable according to the present invention comprises: a cable outer sheath, a plurality of hydrophone acquisition and transmission modules located in the cable outer sheath, a plurality of data acquisition and communication modules and a plurality of double-hole support bodies, wherein the hydrophone acquisition and transmission module comprises a plurality of hydrophones and an acquisition and transmission module for controlling the hydrophones, a hydrophone is symmetrically arranged on both sides of each acquisition and transmission module, at least one double-hole support body is evenly arranged between the hydrophone and the acquisition and transmission module, at least one hydrophone acquisition and transmission module is symmetrically arranged on both sides of each data acquisition and communication module, and at least one double-hole support body is provided between adjacent hydrophone acquisition and transmission modules.

[0006] Furthermore, the offshore seismic exploration acquisition cable is divided into a plurality of channels at equal intervals according to its length, and the hydrophone is located in the middle of the corresponding channel.

[0007] Furthermore, the offshore seismic exploration and acquisition cable also includes a core wire that passes through each hydrophone acquisition and transmission module, data acquisition and communication module and each double-hole support body at the same time, and lubricating glue is filled between the core wire and each hydrophone acquisition and transmission module, data acquisition and communication module and each double-hole support body. The lubricating glue is used to support and protect the core wire and enable the core wire to be movable and retractable; the offshore seismic exploration and acquisition cable also includes a fixing rope that passes through each hydrophone acquisition and transmission module, data acquisition and communication module and each double-hole support body at the same time, and the fixing rope is fixedly connected to each hydrophone acquisition and transmission module, data acquisition and communication module, each double-hole support body and metal joints located at both ends of the offshore seismic exploration and acquisition cable by means of glue injection.

[0008] Furthermore, the data acquisition and communication module includes a depth sensor unit, a data acquisition and communication board unit and a compass unit. The depth sensor unit is used to collect seawater depth data in real time, the compass unit is used to collect information data on the cable body's posture, position and motion status, and the data acquisition and communication board unit is used to transmit the seawater depth data and information data through the core wire.

[0009] Furthermore, the depth sensor unit includes a depth sensor packaging structure and a depth sensor installed in the depth sensor packaging structure. The depth sensor packaging structure includes a first cylindrical skeleton. The first skeleton is axially provided with a depth sensor through hole for installing the depth sensor, a first threading hole for passing a core wire, and a first threaded rope hole for passing a fixing rope. The first skeleton is radially provided with a water inlet hole connected to the depth sensor through hole and a first glue injection hole connected to the first threading hole.

[0010] Furthermore, the depth sensor through hole includes an insertion end for inserting the depth sensor and a blocking end opposite to the insertion end, the water inlet hole is located between the insertion end and the blocking end, a step for stopping the depth sensor is formed in the depth sensor through hole, the step is located between the insertion end and the water inlet hole, the blocking end is detachably installed with a plug, and the insertion end is detachably installed with a clamping fixture.

[0011] Furthermore, anti-skid grooves are symmetrically formed on both sides of the outer peripheral wall of the first frame, and the water inlet hole is located between the anti-skid grooves on both sides.

[0012] Furthermore, the data acquisition and communication board unit includes a data acquisition and communication board packaging structure and a data acquisition and communication board installed in the data acquisition and communication board packaging structure, the data acquisition and communication board packaging structure includes a second cylindrical skeleton, the second skeleton includes a first upper semi-cylinder and a first lower semi-cylinder butted together, a first wire threading groove is provided on the plane of the first upper semi-cylinder connected to the first lower semi-cylinder, the cross-sectional shape of the first wire threading groove is a semi-"8" shape, the plane of the first lower semi-cylinder connected to the first upper semi-cylinder is used to install the data acquisition and communication board, the first upper semi-cylinder and the first lower semi-cylinder are respectively provided with second threaded rope threading holes along the axial direction, and a second glue injection hole connected to the first wire threading groove is provided radially on the first upper semi-cylinder.

[0013] Furthermore, a grounding bolt is connected to the plane of the first lower semi-cylinder that is opposite to the first upper semi-cylinder, and the ground wire of the data acquisition communication board and the ground wire in the core wire passing through the first threading groove are respectively connected to the grounding bolt.

[0014] Furthermore, the compass unit includes a compass packaging structure and a compass installed in the compass packaging structure, the compass packaging structure includes a third cylindrical skeleton, the third skeleton includes a second upper semi-cylinder and a second lower semi-cylinder butted together, a second threading groove is provided on the plane of the second upper semi-cylinder connected to the second lower semi-cylinder, and the cross-sectional shape of the second threading groove is a semi-"8" shape, a step groove is provided on the plane of the second lower semi-cylinder connected to the second upper semi-cylinder, the step groove includes at least a first step, a second step and a third step arranged in sequence from bottom to top, the compass is installed on the second step, the first step and the compass are used for compass wiring, threading and wiring, the second upper semi-cylinder is abutted and fixed on the third step, the second upper semi-cylinder and the second lower semi-cylinder are also axially provided with third threaded rope holes, and the second upper semi-cylinder and the second lower semi-cylinder are also radially provided with third glue injection holes connected to the second threading groove and the step groove.

[0015] Compared with the prior art, the offshore seismic exploration acquisition cable of the present invention embeds multiple hydrophone acquisition and transmission modules and multiple data acquisition and communication modules inside the cable body, so that the detection equipment such as the hydrophone acquisition and transmission modules and the data acquisition and communication modules are isolated from the seawater and fully protected by the cable outer sheath, thereby greatly reducing the failure rate of the towing cable, and at the same time ensuring the operational reliability of the data acquisition and communication modules, so that the operating ship can grasp the cable body posture, position and motion state and other information in real time and stably, thereby improving the operating efficiency of the geophysical exploration ship. In the field of marine seismic exploration, there is no built-in integrated heading, position, depth and other sensors or related technologies in the cable, and the offshore seismic exploration acquisition cable of the present invention will fill the gap in this technology. In addition, the offshore seismic exploration acquisition cable of the present invention achieves more stable support for the inside of the acquisition cable by optimizing the position layout of each hydrophone acquisition and transmission module, each data acquisition and communication module and the double-hole support body and the installation method of each module, so that the multiple data acquisition and communication modules in the cable body can realize more reliable and stable data acquisition and transmission to the operating ship. This data acquisition and transmission method can not only meet the operational requirements, but also greatly improve the reliability and stability of the offshore seismic exploration acquisition cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of an offshore seismic exploration and acquisition cable according to an embodiment of the present invention;

[0017] Figure 2 for Figure 1 The connection diagram of the data acquisition communication module shown;

[0018] Figure 3 for Figure 1 A schematic diagram of the structure of a depth sensor unit shown;

[0019] Figure 4 for Figure 1 The structural schematic diagram of the data acquisition and communication board unit shown;

[0020] Figure 5 for Figure 1 The schematic diagram of the structure of the compass unit is shown. DETAILED DESCRIPTION

[0021] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings.

[0022] Figure 1 FIG. 1 shows the structure of an offshore seismic exploration acquisition cable 100 according to an embodiment of the present invention. Figure 1As shown, the offshore seismic exploration acquisition cable 100 may include: a cable outer sheath 12, a plurality of hydrophone acquisition and transmission modules A located in the cable outer sheath 12, a plurality of data acquisition and communication modules B and a plurality of double-hole support bodies 3, wherein the hydrophone acquisition and transmission module A may include a plurality of hydrophones 2 and an acquisition and transmission module 4 for controlling the hydrophones, a hydrophone 2 is symmetrically arranged on both sides of each acquisition and transmission module 4 for simultaneously controlling the hydrophones 2 on both sides, at least one double-hole support body 3 is evenly spaced between the hydrophone 2 and the acquisition and transmission module 4, at least one hydrophone acquisition and transmission module A is symmetrically arranged on both sides of each data acquisition and communication module B, and at least one double-hole support body 3 is provided between adjacent hydrophone acquisition and transmission modules A.

[0023] The offshore seismic exploration acquisition cable 100 of the embodiment of the present invention embeds multiple hydrophone acquisition and transmission modules A and multiple data acquisition and communication modules B inside the cable body. Compared with the prior art, the external equipment on the cable body is removed, so that the detection equipment such as the hydrophone acquisition and transmission module A and the data acquisition and communication module B are isolated from the seawater and fully protected by the cable outer sheath 12, thereby greatly reducing the failure rate of the towing cable, and at the same time ensuring the operation reliability of the data acquisition and communication module B, so that the operating ship can grasp the cable body posture, position and motion state and other information in real time and stably, thereby improving the operation efficiency of the geophysical exploration ship. The offshore seismic exploration acquisition cable 100 of the embodiment of the present invention optimizes the position layout of each hydrophone acquisition and transmission module A and each data acquisition and communication module B, and the double-hole support body 3 realizes a more stable support for the inside of the acquisition cable, so that the multiple data acquisition and communication modules B (preferably evenly distributed) in the cable body can realize more reliable and stable data acquisition and transmission to the operating ship. This data acquisition and transmission method can not only meet the operation requirements, but also greatly improve the reliability and stability of the offshore seismic exploration acquisition cable 100.

[0024] According to the present invention, in Figure 1 In the preferred embodiment shown, the offshore seismic exploration acquisition cable 100 can be divided into a plurality of tracks C at equal intervals according to its length, and the hydrophone 2 is located in the middle position inside the corresponding track C. Figure 1 In the embodiment shown, the design length of the offshore seismic exploration acquisition cable 100 is 75 meters, and the two ends are respectively connected with an upper metal joint 1 and a lower metal joint 13. The seismic exploration acquisition cable 100 includes two data acquisition communication modules B, and the spacing between adjacent channels C is designed to be 3.125 meters. It can be calculated that the cable is divided into 24 channels. Each acquisition and transmission module 4 controls the acquisition of two left and right hydrophones 2. It can be calculated that the cable has 12 acquisition and transmission modules 4 and 24 hydrophones. The double-hole support body 3 is the main structure of the cable body skeleton, and the number of uses can be increased or decreased according to the total length of the cable body design and the length of the channel spacing.

[0025] In such Figure 1In the preferred embodiment shown, the offshore seismic exploration acquisition cable 100 may also include a core wire 11 that passes through each hydrophone acquisition and transmission module A, data acquisition and communication module B, and each double-hole support body 3 at the same time, and lubricating glue is filled between the core wire 11 and each hydrophone acquisition and transmission module A, data acquisition and communication module B, and each double-hole support body 3. The lubricating glue is used to support and protect the core wire 11 and enable the core wire 11 to be flexible and retractable. By filling the lubricating glue, the core wire 11 can be better filled and protected, and at the same time, the core wire 11 has a flexible and retractable space in the cable body, which can effectively avoid the risk of breakage under the action of external force.

[0026] Preferably, the core line 11 may include a 48V power bus, a communication line, a transmission line, a 485 bus and a ground line. The acquisition and transmission module 4 can transmit the collected seismic data to the shipboard system through the transmission line, and the shipboard sends the acquisition command to the acquisition and transmission module 4 through the communication line. The data acquisition communication module B controls and collects information data such as the attitude, position and motion state of the cable body through the 485 bus.

[0027] like Figure 1 As shown, the offshore seismic exploration and acquisition cable 100 may also include a fixing rope 8 that passes through each hydrophone acquisition and transmission module A, data acquisition and communication module B, and each double-hole support body 3 at the same time, and the fixing rope 8 is fixedly connected with each hydrophone acquisition and transmission module A, data acquisition and communication module B, each double-hole support body 3, and the upper metal joint 1 and the lower metal joint 13 located at both ends of the offshore seismic exploration and acquisition cable 100 by means of glue injection. This arrangement can effectively connect each hydrophone acquisition and transmission module A, data acquisition and communication module B, and each double-hole support body 3 in series and fix them in the cable outer sheath 12 through the combined use of the fixing rope 8 and the glue injection method, so that the fixed position of each hydrophone acquisition and transmission module A, data acquisition and communication module B, and each double-hole support body 3 is more firmly fixed, which helps to further improve the reliability and stability of the offshore seismic exploration and acquisition cable 100.

[0028] It should be noted that the density of the injected colloid should be less than the density of seawater.

[0029] According to the present invention, in Figure 1In the preferred embodiment shown, the data acquisition and communication module B may include a depth sensor unit 5, a data acquisition and communication board unit 6, and a compass unit 7. The depth sensor unit 5 is used to collect seawater depth data in real time, the compass unit 7 is used to collect information data on the cable body posture, position, and motion state, and the data acquisition and communication board unit 6 is used to transmit the seawater depth data and information data through the core line 11. In this embodiment, the data acquisition and communication module B feeds back state information, and the cable body posture, position, and motion state information of the towline in the water are collected by the depth sensor unit 5 and the compass unit 7, and then the data acquisition and communication board unit 6 collects the relevant state information of the towline through the 485 bus to the operating vessel, and the vessel can also send a collection command to the data acquisition and communication board unit 6 through the 485 bus.

[0030] Preferably, the length and accuracy of the core wire 11 can be designed according to the offshore seismic exploration acquisition cable 100, and the data acquisition communication modules B can be distributed equidistantly to ensure that the acquired data is complete and accurate. Figure 2 In the preferred embodiment shown, the total length of the core wire 11 is = a+b+a, the data acquisition communication modules B are arranged at intervals b, the data acquisition communication board unit 6 is connected to the 485 bus and the 48V power bus at the same time, and the compass unit 7 and the depth sensor unit 5 are respectively connected to the data acquisition communication board unit 6.

[0031] In such Figure 3 In the preferred embodiment shown, the depth sensor unit 5 may include a depth sensor packaging structure and a depth sensor 56 installed in the depth sensor packaging structure. The depth sensor packaging structure includes a first cylindrical skeleton 51, and the first skeleton 51 is axially provided with a depth sensor through hole 54 for installing the depth sensor 56, a first threading hole 53 for passing the core wire 11, and a first threaded rope hole 52 for passing the fixing rope 8. The first skeleton 51 is radially provided with a water inlet hole 57 connected to the depth sensor through hole 54 and a first glue injection hole 58 connected to the first threading hole 53.

[0032] In this embodiment, the material of the first frame 51 can be titanium alloy, and the overall design structure is cylindrical, which is similar to the appearance of the cable, which is conducive to providing better support for the cable. The first frame 51 is provided with two symmetrical first threaded rope holes 52 and four symmetrical first glue injection holes 58 for fixing the shell, wherein the thread design of the first threaded rope holes 52 is to make the fixing rope inside the cable body and the first frame 51 better bonded by special glue, which is conducive to the stable fixed installation of the first frame 51 in the cable body, and ensures the stability and reliability of the operation of the built-in equipment.

[0033] Furthermore, if Figure 3As shown, the depth sensor through hole 54 may include an insertion end (as shown in the left figure) for inserting the depth sensor and a plugging end (as shown in the right figure) opposite to the insertion end. The water inlet 57 is located between the insertion end and the plugging end. A step for stopping the depth sensor is formed in the depth sensor through hole 54. The step is located between the insertion end and the water inlet 57. A plug 59 is detachably installed at the plugging end, and a clamping fixture 55 is detachably installed at the insertion end. The step can clamp the sensor head, and the other end fixes the sensor tail through the clamping fixture 55, and then enters the seawater through the water inlet to measure the value. Preferably, the clamping fixture 55 (preferably a clamping nut) on one side of the depth sensor through hole 54 can be hollow designed for wiring. After the wiring is done, special glue for fixing is filled into the hollow design to play a role in fixing and protecting the line. The through hole on the other side is sealed with a plug 59 (preferably a hexagonal thread plug) to prevent seawater from entering the cable body. This design facilitates the disassembly and maintenance of the depth sensor.

[0034] Furthermore, if Figure 3 As shown, anti-skid grooves 50 may be symmetrically formed on both sides of the outer peripheral wall of the first frame 51, and the water inlet 57 is located between the anti-skid grooves 50 on both sides. The provision of the anti-skid grooves 50 is conducive to the first frame 51 and the cable outer sheath 12 being fastened and fixed, ensuring the stability and reliability of the built-in equipment and the smooth flow of seawater into the water inlet 57.

[0035] In such Figure 4 In the preferred embodiment shown, the data acquisition and communication board unit 6 may include a data acquisition and communication board packaging structure and a data acquisition and communication board 66 installed in the data acquisition and communication board packaging structure. The data acquisition and communication board packaging structure may include a second cylindrical skeleton 60, and the second skeleton 60 includes a first upper semi-cylinder 61 and a first lower semi-cylinder 69 that are butt-jointed together. A first threading groove 64 is provided on the plane of the first upper semi-cylinder 61 that is opposite to the first lower semi-cylinder 69. The cross-sectional shape of the first threading groove 64 is a semi-"8" shape. The plane of the first lower semi-cylinder 69 that is opposite to the first upper semi-cylinder 61 is used to install the data acquisition and communication board 66. The first upper semi-cylinder 61 and the first lower semi-cylinder 69 are also axially provided with second threaded rope holes 63, respectively. The first upper semi-cylinder 61 is radially provided with a second glue injection hole 62 that is connected to the first threading groove 64.

[0036] In this embodiment, the first upper semi-cylinder 61 and the first lower semi-cylinder 69 can be made of aluminum alloy and fixed by 8 M3 hexagon socket screws 68 and nuts 67; the data acquisition and communication board 66 can be fixedly installed inside the first lower semi-cylinder 69 by 4 M2.5 screws, and the cross-sectional shape of the first threading groove 64 is a half "8" shape, which can make full use of the space to facilitate the smooth threading of the first threading groove 64, and a special fixing glue is used to fill the position of the data acquisition and communication board 66 to fix and protect it, and the upper adjacent data acquisition and communication board 66 is fixedly installed. The first semi-8-shaped wire threading groove 64 can be filled with lubricating glue; the overall design structure of the second skeleton 60 is cylindrical, similar to the appearance of the cable; the first upper semi-cylinder 61 and the first lower semi-cylinder 69 each have a second threaded rope threading hole 63 and two second glue injection holes 62, wherein the thread design of the second threaded rope threading hole 63 is to make the fixing rope 8 inside the cable body and the second skeleton 60 better bonded by special glue, which is conducive to the stable fixed installation of the second skeleton 60 in the cable body, and ensure the stability and reliability of the built-in equipment.

[0037] Preferably, if Figure 4 As shown, a grounding bolt 65 may also be connected to the plane of the first lower semi-cylinder 69 that is connected to the first upper semi-cylinder 61, and the ground wire of the data acquisition and communication board 66 and the ground wire in the core wire 11 passing through the first threading groove 64 are respectively connected to the grounding bolt 65 to ensure the safe use of the data acquisition and communication board 66.

[0038] In such Figure 5 In the preferred embodiment shown, the compass unit 7 may include a compass packaging structure and a compass 76 installed in the compass packaging structure. The compass packaging structure may include a third cylindrical frame 70. The third frame 70 includes a second upper semi-cylinder 71 and a second lower semi-cylinder 79 that are butt-jointed together. A second threading groove 74 is provided on a plane of the second upper semi-cylinder 71 that is in contact with the second lower semi-cylinder 79. The cross-sectional shape of the second threading groove 74 is a semi-"8" shape. A step is provided on a plane of the second lower semi-cylinder 79 that is in contact with the second upper semi-cylinder 71. Groove 75, the stepped groove 75 at least includes a first step, a second step and a third step arranged in sequence from bottom to top, the compass 76 is installed on the second step, the first step and the compass 76 are used for compass wiring, threading and wiring, the second upper semi-cylinder 71 is abutted and fixed on the third step, the second upper semi-cylinder 71 and the second lower semi-cylinder 79 are also axially provided with a third threaded rope hole 73, and the second upper semi-cylinder 71 and the second lower semi-cylinder 79 are also radially provided with a third glue injection hole 72 connected with the second threading groove 74 and the stepped groove 75.

[0039] In this embodiment, the second upper semi-cylinder 71 and the second lower semi-cylinder 79 can be made of aluminum alloy and are fixed together by 6 M3 hexagon socket screws 78 and nuts 77; the compass 76 is fixedly installed on the second step by 4 M2 screws inside the second lower semi-cylinder 79, and the first step below the second step is convenient for wiring, threading and wiring of the compass 76; the cross-sectional shape of the second threading groove 74 is a half "8" shape, which can make full use of the space to facilitate the smooth threading of the second threading groove 74, and a special fixing glue is used to fill the position of the compass 76 to fix it. For fixed protection, the second semi-8-shaped wire threading groove 74 adjacent to it can be filled with lubricating glue; the overall design structure of the third skeleton 70 is cylindrical, similar to the appearance of the cable; the second upper semi-cylinder 71 and the second lower semi-cylinder 79 each have a third threaded rope threading hole 73 and a third glue injection hole 72, wherein the thread design of the third threaded rope threading hole 73 is to make the fixing rope 8 inside the cable and the third skeleton 70 better bonded by special glue, which is conducive to the stable fixed installation of the third skeleton 70 in the cable body, and ensure the stability and reliability of the built-in equipment.

[0040] According to the present invention, the transmission module 4 may include a transmission module packaging structure (not shown in the figure) and a transmission circuit board installed in the transmission module packaging structure. The transmission module packaging structure may include a cylindrical fourth frame, and the fourth frame is provided with at least a transmission circuit board mounting hole, a fourth threading hole, and a fourth threaded rope threading hole in the axial direction. The transmission module packaging structure may be similar to Figure 3 The depth sensor packaging structure shown is different from this embodiment in that the outer surface of the fourth frame of the sampling and sensor module packaging structure does not need to be provided with a water inlet hole 57 and an anti-slip groove 50.

[0041] According to the present invention, the double-hole support body 3 can also be constructed as a cylindrical skeleton, and the skeleton can also be axially provided with a fifth threading hole and a fifth threaded rope threading hole. The fixing rope 8 can simultaneously pass through the first threaded rope threading hole 52, the second threaded rope threading hole 63, the third threaded rope threading hole 73, the fourth threaded rope threading hole and the fifth threaded rope threading hole and be fixedly connected to the first skeleton 51, the second skeleton 60, the third skeleton 70, the fourth skeleton, the double-hole support body 3 and the upper metal joint 1 and the lower metal joint 13 at both ends of the offshore seismic exploration and acquisition cable 100 through the injected colloid.

[0042] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0043] In the description of the present application, it should be understood that the terms "upper", "lower", "axial", "radial", etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0044] In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. An offshore seismic exploration and acquisition cable, characterized in that: include: A cable outer sheath, a plurality of hydrophone data acquisition and transmission modules located within the cable outer sheath, a plurality of data acquisition and communication modules and a plurality of double-hole support bodies, wherein the hydrophone data acquisition and transmission modules include a plurality of hydrophones and a data acquisition and transmission module for controlling the hydrophones, one hydrophone is symmetrically arranged on both sides of each data acquisition and transmission module, at least one double-hole support body is evenly spaced between the hydrophone and the data acquisition and transmission module, at least one hydrophone data acquisition and transmission module is symmetrically arranged on both sides of each data acquisition and communication module, and at least one double-hole support body is provided between adjacent hydrophone data acquisition and transmission modules.

2. The offshore seismic exploration and acquisition cable according to claim 1, characterized in that: The offshore seismic exploration acquisition cable is divided into a plurality of channels at equal intervals according to its length, and the hydrophone is located at the middle position inside the corresponding channel.

3. The offshore seismic exploration and acquisition cable according to claim 1 or 2, characterized in that: The offshore seismic exploration and acquisition cable also includes a core wire that passes through each of the hydrophone acquisition and transmission modules, the data acquisition and communication modules, and each double-hole support body at the same time. Lubricating glue is filled between the core wire and each of the hydrophone acquisition and transmission modules, the data acquisition and communication modules, and each double-hole support body. The lubricating glue is used to support and protect the core wire and enable the core wire to be movable and retractable; the offshore seismic exploration and acquisition cable also includes a fixing rope that passes through each of the hydrophone acquisition and transmission modules, the data acquisition and communication modules, and each double-hole support body at the same time. The fixing rope is fixedly connected to each of the hydrophone acquisition and transmission modules, the data acquisition and communication modules, each double-hole support body, and the metal joints located at both ends of the offshore seismic exploration and acquisition cable by means of glue injection.

4. The offshore seismic exploration and acquisition cable according to claim 3, characterized in that: The data acquisition and communication module includes a depth sensor unit, a data acquisition and communication board unit and a compass unit. The depth sensor unit is used to collect seawater depth data in real time. The compass unit is used to collect information data on the cable body's posture, position and motion status. The data acquisition and communication board unit is used to transmit the seawater depth data and the information data through the core wire.

5. The offshore seismic exploration and acquisition cable according to claim 4, characterized in that: The depth sensor unit includes a depth sensor packaging structure and a depth sensor installed in the depth sensor packaging structure. The depth sensor packaging structure includes a first cylindrical skeleton. The first skeleton is axially provided with a depth sensor through hole for installing the depth sensor, a first threading hole for passing the core wire, and a first threaded rope hole for passing the fixing rope. The first skeleton is radially provided with a water inlet hole connected to the depth sensor through hole and a first glue injection hole connected to the first threading hole.

6. The offshore seismic exploration and acquisition cable according to claim 5, characterized in that: The depth sensor through hole includes an insertion end for inserting the depth sensor and a blocking end opposite to the insertion end, the water inlet hole is located between the insertion end and the blocking end, a step for stopping the depth sensor is formed in the depth sensor through hole, the step is located between the insertion end and the water inlet hole, a plug is detachably installed on the blocking end, and a clamping fixture is detachably installed on the insertion end.

7. The offshore seismic exploration and acquisition cable according to claim 6, characterized in that: Anti-skid grooves are symmetrically formed on both sides of the outer peripheral wall of the first frame, and the water inlet hole is located between the anti-skid grooves on both sides.

8. The offshore seismic exploration and acquisition cable according to claim 4, characterized in that: The data acquisition and communication board unit includes a data acquisition and communication board packaging structure and a data acquisition and communication board installed in the data acquisition and communication board packaging structure, the data acquisition and communication board packaging structure includes a second cylindrical skeleton, the second skeleton includes a first upper semi-cylinder and a first lower semi-cylinder butted together, a first threading groove is provided on a plane of the first upper semi-cylinder that is opposite to the first lower semi-cylinder, and the cross-sectional shape of the first threading groove is a semi-"8" shape, and the plane of the first lower semi-cylinder that is opposite to the first upper semi-cylinder is used to install the data acquisition and communication board, and second threaded rope holes are respectively provided on the first upper semi-cylinder and the first lower semi-cylinder along the axial direction, and a second glue injection hole connected to the first threading groove is provided on the first upper semi-cylinder along the radial direction.

9. The offshore seismic exploration and acquisition cable according to claim 8, characterized in that: A grounding bolt is also connected to the plane of the first lower semi-cylinder that is opposite to the first upper semi-cylinder, and the ground wire of the data acquisition communication board and the ground wire in the core wire passing through the first threading groove are respectively connected to the grounding bolt.

10. The offshore seismic exploration and acquisition cable according to claim 4, characterized in that: The compass unit includes a compass packaging structure and a compass installed in the compass packaging structure. The compass packaging structure includes a third cylindrical skeleton, the third skeleton includes a second upper semi-cylinder and a second lower semi-cylinder butted together, a second threading groove is provided on a plane of the second upper semi-cylinder that is opposite to the second lower semi-cylinder, and the cross-sectional shape of the second threading groove is a semi-"8" shape, a stepped groove is provided on a plane of the second lower semi-cylinder that is opposite to the second upper semi-cylinder, and the stepped groove at least includes a first step, a second step and a third step arranged in sequence from bottom to top, the compass is installed on the second step, the first step and the compass are used for compass wiring, threading and wiring, the second upper semi-cylinder is abutted and fixed on the third step, the second upper semi-cylinder and the second lower semi-cylinder are respectively provided with a third threaded rope threading hole along the axial direction, and the second upper semi-cylinder and the second lower semi-cylinder are respectively provided with a third glue injection hole connected with the second threading groove and the stepped groove along the radial direction.

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