Cover, marine seismic node acquisition components and devices

Abstract

This application discloses a cover, a marine seismic node acquisition component, and a device, belonging to the field of marine oil and gas exploration technology. The cover includes: a main body and a first mounting portion located on one side of the main body; the first mounting portion includes a first sub-part and a second sub-part spaced apart, with a receiving space formed between the first sub-part and the second sub-part, and a first groove formed on the main body corresponding to the receiving space; the first sub-part has a first connecting channel and at least one first connecting hole, the at least one first connecting hole communicating with the first connecting channel, and the first connecting channel communicating with the receiving space; the second sub-part has a second connecting channel communicating with the receiving space; wherein the axis of the first connecting channel and the axis of the second connecting channel are located on the same straight line. This cover makes it difficult for mud, sand, and other debris to accumulate in the space where the piezoelectric detector is installed, effectively preventing debris from affecting the signal reception performance of the piezoelectric detector and ensuring the normal use of the piezoelectric detector.

Description

Technical Field

[0001] This application relates to the field of marine oil and gas exploration technology, and in particular to a cover, marine seismic node acquisition component and device. Background Technology

[0002] As offshore oil and gas resource development becomes an increasingly important area, offshore oil and gas exploration technology is also becoming increasingly important. Marine seismic node acquisition devices, with their advantages of wide azimuth, high coverage, and high efficiency, are one of the main devices required for offshore oil and gas exploration.

[0003] In related technologies, the housing of a marine seismic node acquisition device has an opening structure specifically for installing a piezoelectric detector, which can be fixedly installed in this opening structure. However, since this opening structure only has one side opening, a gap remains between the piezoelectric detector placed inside and the inner wall of the structure. When the marine seismic node acquisition device is used in the ocean, water currents carrying sediment will bring sediment and other debris into the opening structure and trap them there. This debris affects the signal reception performance of the piezoelectric detector, thereby affecting its normal operation. Summary of the Invention

[0004] In view of this, this application provides a cover, a marine seismic node acquisition component and device, which can effectively avoid the influence of debris on the signal receiving performance of the piezoelectric detector and ensure the normal use of the piezoelectric detector.

[0005] Specifically, the following technical solutions are included:

[0006] In a first aspect, embodiments of this application provide a cover, the cover comprising: a body and a first mounting portion located on one side of the body;

[0007] The first mounting portion includes a first sub-part and a second sub-part spaced apart, with a receiving space formed between the first sub-part and the second sub-part. A first groove is formed on the body corresponding to the receiving space. The first sub-part has a first communicating channel and at least one first communicating hole, with the at least one first communicating hole communicating with the first communicating channel and the first communicating channel communicating with the receiving space. The second sub-part has a second communicating channel, with the second communicating channel communicating with the receiving space.

[0008] The axis of the first connecting channel and the axis of the second connecting channel are on the same straight line.

[0009] In some embodiments, for each first connecting hole, the length direction of the first connecting hole is parallel to the axis of the first connecting channel and / or the axis direction of the second connecting channel.

[0010] In some embodiments, when there are multiple first connecting holes, the multiple first connecting holes are arranged in parallel and spaced apart, and the interval between two adjacent first connecting holes is the same.

[0011] In some embodiments, the inner wall thickness of the first sub-part along the radial direction of the first communicating channel is greater than or equal to 5 mm.

[0012] In some embodiments, the side of the second sub-part facing the second sub-part is a plane.

[0013] In some embodiments, the second communication channel includes a first communication sub-channel and a second communication sub-channel;

[0014] The first connecting sub-channel and the second connecting sub-channel are arranged sequentially and interconnected in a direction away from the second sub-part. The inner wall of the first connecting sub-channel is smooth, and the inner wall of the second connecting sub-channel is threaded.

[0015] In some embodiments, the body has a second connecting hole, which communicates with the second connecting channel.

[0016] In a second aspect, embodiments of this application also provide a marine seismic node acquisition component, the component including a cover and a piezoelectric detector as described in any of the first aspects;

[0017] When the component is configured for installation and use, one end of the piezoelectric detector passes through the first connecting channel and the receiving space, and enters the second connecting channel.

[0018] In some embodiments, the piezoelectric detector includes a body and a nut, the nut being sleeved on one end of the body, and the cross-sectional area of ​​the first communicating channel being larger than the cross-sectional area of ​​the nut.

[0019] Thirdly, embodiments of this application also provide a marine seismic node acquisition device, the device comprising a cover as described in any of the first aspects, or a marine seismic node acquisition component as described in any of the second aspects.

[0020] The beneficial effects of the technical solutions provided in this application include at least the following:

[0021] The cover provided in this application embodiment, by setting a first mounting portion on one side of the main body as a first sub-part and a second sub-part spaced apart, forms an accommodating space between the first sub-part and the second sub-part. A first groove is provided on the main body corresponding to this accommodating space, making the space sufficiently large. A coaxial first connecting channel and a second connecting channel are respectively provided in the first sub-part and the second sub-part, allowing the piezoelectric detector to be inserted through the first connecting channel, pass through the accommodating space, and enter the second connecting channel, thus achieving a fixed connection to the cover. When the marine seismic node acquisition device equipped with this cover is used in the ocean, since water and sediment can flow freely within the first connecting channel, even if sediment remains in the first connecting channel, it can flow out through at least one connecting hole. This makes it difficult for sediment and other debris to accumulate in the space where the piezoelectric detector is installed, effectively preventing debris from affecting the signal reception performance of the piezoelectric detector and ensuring its normal operation. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a cover provided in an embodiment of this application;

[0024] Figure 2 A schematic diagram of the structure of the second connecting channel of a cover provided in an embodiment of this application;

[0025] Figure 3 A schematic diagram of the structure of a marine seismic node acquisition component provided in this application embodiment;

[0026] Figure 4 This is a schematic diagram of the structure of a marine seismic node acquisition device provided in an embodiment of this application.

[0027] The reference numerals in the figure are respectively:

[0028] 1-Cover body; 11-First mounting part; 111-First sub-part; 1111-First communicating channel; 1112-First communicating hole; 112-Second sub-part; 1121-Second communicating channel; 11211-First communicating sub-channel; 11212-Second communicating sub-channel; 12-First groove; 13-Second communicating hole; 14-Third communicating channel; 15-Handle;

[0029] 2-Piezoelectric detector; 21-Main body; 22-Nut; 23-Connecting part;

[0030] 3-Cavity body; 31-First containment compartment; 32-Second containment compartment; 33-Third containment compartment.

[0031] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] In the embodiments of this application, directional terms such as "upper," "lower," and "side" are generally used in the following ways: Figure 1 The relative positions shown are based on the given information, and these directional terms are used only to more clearly describe the relationships between structures, not to describe absolute positions. Positions may change when the product is placed in different orientations; for example, "up" and "down" may be interchanged.

[0034] Unless otherwise defined, all technical terms used in the embodiments of this application have the same meaning as commonly understood by those skilled in the art. Some technical terms appearing in the embodiments of this application are described below.

[0035] In the embodiments of this application, the term "axial direction" generally refers to the direction of the axis, that is, the direction of the central axis of the channel.

[0036] The "radial" aspect generally refers to the direction from the center point of the channel outwards to any point on the outer surface.

[0037] To make the technical solutions and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0038] Currently, offshore oil and gas resource development is increasingly becoming an important area of ​​oil and gas resource development, making offshore oil and gas exploration technology increasingly important. During offshore oil and gas exploration, acquisition instruments are needed to collect the seismic signal data required for exploration. Marine seismic node acquisition devices, with their advantages of wide azimuth, high coverage, and high efficiency, are one of the main devices required for offshore oil and gas exploration.

[0039] In related technologies, piezoelectric detectors on marine seismic nodal acquisition devices are typically used to acquire seismic signal data required for oil and gas exploration. The housing of the marine seismic nodal acquisition device has an opening structure specifically for mounting the piezoelectric detector, which can be fixedly installed within this opening. However, because this opening structure only has one side, a gap exists between the piezoelectric detector placed inside and the inner wall of the structure. When the marine seismic nodal acquisition device is used in the ocean, water currents carrying sediment can bring sediment and other debris into the opening structure, where it becomes trapped. This debris affects the signal reception performance of the piezoelectric detector, thus impacting its normal operation.

[0040] In order to solve the technical problems existing in the related technologies, this application provides a cover that can prevent debris from affecting the signal receiving function of the piezoelectric detector and ensure the normal use of the piezoelectric detector.

[0041] Figure 1 A schematic diagram of the structure of a cover provided in an embodiment of this application is shown below. Figure 1 The cover includes a body 1 and a first mounting part 11 located on one side of the body 1.

[0042] The first mounting portion 11 includes a first sub-portion 111 and a second sub-portion 112 spaced apart, with a receiving space 113 formed between the first sub-portion 111 and the second sub-portion 112. A first groove 12 is provided on the body 1 corresponding to the receiving space 113. The first sub-portion 111 has a first connecting channel 1111 and at least one first connecting hole 1112, with the at least one first connecting hole 1112 communicating with the first connecting channel 1111 and the first connecting channel 1111 communicating with the receiving space 113. The second sub-portion 112 has a second connecting channel 1121 communicating with the receiving space 113. The axis of the first connecting channel 1111 and the axis of the second connecting channel 1121 are located on the same straight line.

[0043] It is understandable that the first connecting channel 1111 provided on the first sub-part 111 of the first mounting part 11 is used to store the piezoelectric detector. Since a receiving space 113 is provided between the first sub-part 111 and the second sub-part 112, and at least one first connecting hole 1112 connected to the first connecting channel 1111 is also provided on the first sub-part 111, when the piezoelectric detector is installed in the first mounting part 11, the first mounting part 11 where the piezoelectric detector is placed has three structures that are connected to the outside: the receiving space 113, at least one first connecting hole 1112, and the first connecting channel 1111. This allows the piezoelectric detector to be washed out by the water flow through these three structures connected to the outside when the cover is placed in the ocean. When the water flow carrying silt and sand brings silt and other debris to the vicinity of the piezoelectric detector, these debris will be washed out by the water flow through these three structures connected to the outside, and will no longer be deposited around the piezoelectric detector, ensuring that the signal receiving performance of the piezoelectric detector is not affected.

[0044] Therefore, the cover provided in this application embodiment is configured by setting the first mounting portion 11 located on one side of the main body 1 as a first sub-part 111 and a second sub-part 112 spaced apart, so that a receiving space 113 is formed between the first sub-part 111 and the second sub-part 112. The space is sufficiently large by having a first groove 12 on the main body 1 corresponding to the receiving space 113. By setting a coaxial first connecting channel 1111 and a second connecting channel 1121 on the first sub-part 111 and the second sub-part 112 respectively, the piezoelectric detector is inserted from the first connecting channel 1111, passes through the receiving space 113 and enters the second connecting channel 1121, thus achieving a fixed connection on the cover. When the marine seismic node acquisition device equipped with the cover is placed in the ocean for use, the water and sediment can flow freely in the first connecting channel 1111. Even if there is sediment in the first connecting channel 1111, it can flow out through at least one first connecting hole 1112. This makes it difficult for sediment and other debris to accumulate in the space where the piezoelectric detector is installed. This can effectively prevent debris from affecting the signal receiving performance of the piezoelectric detector and ensure the normal use of the piezoelectric detector.

[0045] In some embodiments, for each first connecting hole 1112, the length direction of the first connecting hole 1112 is parallel to the axis of the first connecting channel 1111 and / or the axis of the second connecting channel 1121.

[0046] By setting the length direction of the first connecting hole 1112 to be parallel to the axis of the first connecting channel 1111 and / or the axis of the second connecting channel 1121, that is, parallel to the flow direction of water carrying mud and other debris when it enters the first connecting channel 1111, it is easier for mud and other debris to be flushed out of the first connecting channel 1111 by the water flow.

[0047] In some embodiments, when there are multiple first connecting holes 1112, the multiple first connecting holes 1112 are arranged in parallel and spaced apart, and the interval between two adjacent first connecting holes 1112 is the same.

[0048] In some embodiments, the width of the first connecting hole 1112 is not less than 5 mm.

[0049] For example, the first connecting hole 1112 can be a first connecting hole 1112 with a width of 6mm, and the interval length between multiple first connecting holes 1112 can be 4mm.

[0050] Considering the impact of obstructions on the signal reception of the piezoelectric detector, the width of the first connecting hole 1112 is set to be no less than 5mm to ensure that the signal reception of the piezoelectric detector is not affected by the surrounding metal. For example, the width of the first connecting hole 1112 can be set to 6mm, and it should not be too wide, because it is necessary to ensure that the cover structure has good impact resistance.

[0051] By setting multiple first connecting holes 1112, for example, see Figure 1 Three first connecting holes 1112 can be set. This makes it easier for mud, sand and other debris that enter the first connecting channel 1111 with the water flow to be washed out of the first connecting channel 1111 by the water flow.

[0052] In some embodiments, the inner wall thickness of the first sub-part 111 along the radial direction of the first connecting channel 1111 is greater than or equal to 5 mm.

[0053] Since the cover provided in this embodiment needs to be placed in water at a depth of 3000 meters for use, it is necessary to ensure that each structure has sufficient strength. Therefore, the inner wall thickness of the first sub-part 111 along the radial direction of the first connecting channel 1111 is set to be greater than or equal to 5mm to ensure the strength and stability of the structure, while protecting the piezoelectric detector from damage.

[0054] In some embodiments, the side of the second sub-part 112 facing the first sub-part 111 is a plane.

[0055] A flat surface is provided on the side of the second sub-part 112 facing the first sub-part 111. After the piezoelectric detector is installed, this flat surface can cooperate with the axial sealing ring on the sealing part of the piezoelectric detector to achieve a sealing effect.

[0056] In some embodiments, the distance between the side of the cover near the first sub-part 111 and the side of the second sub-part 112 facing the first sub-part 111 is not less than 66 mm.

[0057] Understandably, setting the distance between the side of the cover near the first sub-part 111 and the side of the second sub-part 112 facing the first sub-part 111 to be no less than 66mm can effectively protect the piezoelectric detector from damage due to impact or drop.

[0058] In some embodiments, Figure 2 A schematic diagram of the structure of the second connecting channel of a cover provided in an embodiment of this application is shown below. Figure 2 The second connecting channel 1121 includes a first connecting sub-channel 11211 and a second connecting sub-channel 11212.

[0059] The first connecting sub-channel 11211 and the second connecting sub-channel 11212 are arranged sequentially and connected to each other in a direction away from the second sub-part 112. The inner wall of the first connecting sub-channel 11211 is smooth, and the inner wall of the second connecting sub-channel 11212 is threaded.

[0060] Understandably, the connection part of the piezoelectric detector is divided into two parts: a sealing part and a threaded connection part. The channel cylindrical surface of the first connecting sub-channel 11211 is used to cooperate with the radial sealing ring in the sealing part of the piezoelectric detector to achieve a sealing effect. The thread on the inner wall of the second connecting sub-channel 11212 is used to cooperate with the threaded connection part of the piezoelectric detector connection part to tightly fix the piezoelectric detector on the cover body, while meeting the 30MPa pressure resistance required for deep-water operations.

[0061] In some embodiments, the diameter of the cross-section of the first connecting sub-channel 11211 is not less than 14.25 mm and the length is not less than 5.4 mm. For example, it can be a cylindrical channel with a diameter of 14.25 mm and a length of 7 mm.

[0062] In some embodiments, the second connecting channel 1121 can be a mechanically threaded hole with a length of 7 mm.

[0063] In some embodiments, the radial inner wall thickness of the first connecting sub-channel 11211 and the second connecting sub-channel 11212 is not less than 10 mm.

[0064] Considering that the cover provided in this embodiment needs to be placed at a water depth of 3000 meters, it is necessary to consider whether the strength of each structure can withstand the enormous water pressure. In this embodiment, the radial inner wall thickness of the first connecting sub-channel 11211 and the second connecting sub-channel 11212 is set to be no less than 10 mm to ensure the stability of the cover structure and to protect the connection part of the piezoelectric detector placed in the first connecting sub-channel 11211 and the second connecting sub-channel 11212.

[0065] In some embodiments, see Figure 3The body 1 has a second connecting hole 13, which is connected to the second connecting channel 1121.

[0066] The piezoelectric detector's wiring is connected to the chamber body connected to the cover body via the second connecting hole 13, which is connected to the second connecting channel 1121.

[0067] In some embodiments, see Figure 3 The body 2 also has a third connecting channel 14 that connects to the second connecting hole 13 and the second connecting channel 1121, and the axis of the third connecting channel 14 is on the same straight line as the axis of the second connecting channel 1121.

[0068] By setting up the third connecting channel 14, it is easier to connect the piezoelectric detector's wiring to the wiring inside the chamber, and the total length of the wiring can be shortened, resulting in less interference to the piezoelectric signal. A sealing piston is installed at the other end of the third connecting channel 14 to prevent water from entering the third connecting channel 14 and avoid damage to the wiring.

[0069] In some embodiments, Figure 4 This is a schematic diagram of the structure of a marine seismic node acquisition device provided in an embodiment of this application, wherein, Figure 4 The image on the left is a right-hand view of the image on the right. See also... Figure 4 The main body 1 is also equipped with a handle 15.

[0070] It is understandable that the dragging direction is controlled by connecting a rope to the handle 15. Specifically, the dragging direction is controlled to be perpendicular to the axis of the first connecting channel 1111, thereby ensuring that the water flow direction is perpendicular to the installation direction of the piezoelectric detector, reducing the impact of the water flow on the piezoelectric detector, and extending the service life of the piezoelectric detector.

[0071] This application also provides a marine seismic node acquisition component. Figure 3 A schematic diagram of the structure of a marine seismic node acquisition component provided in an embodiment of this application is shown below. Figure 2 The component includes the cover and piezoelectric detector 2 as described in the above embodiments;

[0072] When the component is installed and used, one end of the piezoelectric detector 2 passes through the first connecting channel 1111 and the receiving space 113, and enters the second connecting channel 1121.

[0073] The marine seismic node acquisition component provided in this application embodiment fixes the piezoelectric detector to the cover by mounting it on the cover body. Specifically, the piezoelectric detector is fixedly connected to the cover body by passing one end of the piezoelectric detector through the first connecting channel 1111 and the receiving space 113 and entering the second connecting channel 1121. At the same time, the first mounting part 11 on one side of the cover body 1 is configured as a first sub-part 111 and a second sub-part 112 spaced apart, so that a receiving space 113 is formed between the first sub-part 111 and the second sub-part 112. The receiving space 113 is sufficiently large by having a first groove 12 on the body 1 corresponding to the receiving space 113. By setting the first connecting channel 1111 and the second connecting channel 1121 coaxially on the first sub-part 111 and the second sub-part 112 respectively, the piezoelectric detector is inserted from the first connecting channel 1111, passes through the receiving space 113 and enters the second connecting channel 1121, thus achieving a fixed connection to the cover body. When the marine seismic node acquisition device equipped with the cover is placed in the ocean for use, the water and sediment can flow freely in the first connecting channel 1111. Even if there is sediment in the first connecting channel 1111, it can flow out through at least one first connecting hole 1112. This makes it difficult for sediment and other debris to accumulate in the space where the piezoelectric detector is installed. This can effectively prevent debris from affecting the signal receiving performance of the piezoelectric detector and ensure the normal use of the piezoelectric detector.

[0074] In some embodiments, see Figure 3 The piezoelectric detector 2 includes a main body 21 and a nut 22. The nut 22 is sleeved on one end of the main body 21, and the cross-sectional area of ​​the first connecting channel 1111 is larger than the cross-sectional area of ​​the nut 22.

[0075] When the component is configured for installation and use, the piezoelectric detector 2 needs to enter through the first connecting channel 1111. Therefore, the cross-sectional area of ​​the first connecting channel 1111 needs to be larger than the cross-sectional area of ​​the nut 22 to ensure that the piezoelectric detector can successfully enter the receiving space 113 formed between the first sub-part 111 and the second sub-part 112 and the second connecting channel 1121.

[0076] To ensure that the piezoelectric detector can successfully enter the receiving space 113 formed between the first sub-part 111 and the second sub-part 112, as well as the second connecting channel 1121, the dimensions of the first connecting channel 1111, the main body 21 of the piezoelectric detector, and the nut 22 will be illustrated below with examples:

[0077] In some embodiments, the body 21 of the piezoelectric detector can be a black rubber material wrapped around a cylindrical ceramic tube, with a diameter of 19 mm and a length of 58 mm.

[0078] In some embodiments, the nut 22 can be a hexagonal nut with a thickness of 8 mm and a maximum outer edge dimension of 26 mm.

[0079] In some embodiments, provided that the body 21 and the nut 22 are of the above-described dimensions and types, the diameter of the cross-section of the first connecting channel 1111 is not less than 27 mm, the distance from one end of the first connecting channel 1111 located on one side of the cover to the side of the second sub-part 112 facing the first sub-part 111 is not less than 66 mm, and the distance from the bottom surface of the receiving space 113 formed between the first sub-part 111 and the second sub-part 112 to the center point of the second connecting channel 1121 is not less than 23.5 mm. For example, the length of the receiving space 113 can be 60 mm, the width can be 25 mm, the depth can be 34 mm, the thickness can be not less than 4 mm, and the shape can be a rectangular open long groove.

[0080] In some embodiments, see Figure 3 The piezoelectric detector 2 also includes a connecting part 23, with a nut 22 sleeved on one end of the connecting part 23, and the cross-sectional area of ​​the second connecting channel 1121 is greater than the maximum cross-sectional area of ​​the connecting part 23.

[0081] In some embodiments, the connection portion 23 of the piezoelectric detector is divided into a sealing portion and a threaded connection portion, wherein the threaded connection portion is provided with external threads.

[0082] It is understood that the piezoelectric detector 2 is tightly fixed to the cover by the thread engagement between the external thread and the inner wall of the second connecting sub-channel 11212. Compared with related technologies, the piezoelectric detector in the marine seismic node acquisition assembly provided in this application embodiment omits the fixing ring slot part, which makes it easier to install and remove from the cover.

[0083] In some embodiments, the sealing portion of the piezoelectric detector 2 is provided with a plurality of sealing grooves, and at least one axial sealing ring and at least one radial sealing ring are provided on the plurality of sealing grooves.

[0084] The axial sealing ring is used to cooperate with the first connecting sub-channel 11121 to achieve a sealing effect, while the radial sealing ring is used to cooperate with the side of the second sub-part 112 facing the first sub-part 111 to achieve a sealing effect.

[0085] To ensure that the connection part 23 of the piezoelectric detector can successfully enter the second communication channel 1121, the dimensions of the second communication channel 1121 and the connection part 23 of the piezoelectric detector will be illustrated below with examples:

[0086] In some embodiments, the threaded connection portion of the piezoelectric detector 23 may be an M10 external thread with a length of 8 mm.

[0087] This application also provides a marine seismic node acquisition device, which includes the cover body involved in the above embodiments, or the marine seismic node acquisition component involved in the above embodiments.

[0088] The marine seismic node acquisition device provided in this application embodiment has a cover structure as described in the above embodiment, which makes it difficult for mud and sand or other debris to accumulate in the space where the piezoelectric detector is installed. This can effectively prevent debris from affecting the signal reception performance of the piezoelectric detector and ensure the normal use of the piezoelectric detector.

[0089] In some embodiments, see Figure 4 The device also includes a housing 3, which contains a first housing 31, a second housing 32, and a third housing 33. The first housing 31 serves as a circuit housing, while the second housing 32 and the third housing 33 serve as a first battery housing and a second battery housing, respectively. The housing shell consists of two detachable, upper and lower half-shaped non-metallic shells. The housing shell is connected to the circuit housing mounting structure, the first battery housing mounting structure, and the second battery housing mounting structure on the cover.

[0090] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0091] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0092] In the description of this specification, the references to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the embodiments or examples that are included in at least one embodiment or example of this application.

[0093] The above are merely embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this application should be included within the protection scope of this application.

Claims

1. A cover body, characterized in that, The cover includes: a body (1) and a first mounting part (11) located on one side of the body (1). The first mounting portion (11) includes a first sub-part (111) and a second sub-part (112) spaced apart. A receiving space (113) is formed between the first sub-part (111) and the second sub-part (112). A first groove (12) is provided on the body (1) corresponding to the receiving space (113). The first sub-part (111) has a first communicating channel (1111) and at least one first communicating hole (1112). The at least one first communicating hole (1112) communicates with the first communicating channel (1111), and the first communicating channel (1111) communicates with the receiving space (113). The second sub-part (112) has a second communicating channel (1121), and the second communicating channel (1121) communicates with the receiving space (113). The axis of the first connecting channel (1111) and the axis of the second connecting channel (1121) are on the same straight line. Wherein, for each first connecting hole (1112), the length direction of the first connecting hole (1112) is parallel to the axis of the first connecting channel (1111) and / or the axis of the second connecting channel (1121); In the case where there are multiple first connecting holes (1112), the multiple first connecting holes (1112) are arranged in parallel and spaced apart, and the spacing between two adjacent first connecting holes (1112) is the same. The second connecting channel (1121) includes a first connecting sub-channel (11211) and a second connecting sub-channel (11212); the first connecting sub-channel (11211) and the second connecting sub-channel (11212) are arranged sequentially and connected to each other in a direction away from the second sub-part (112); the inner wall of the first connecting sub-channel (11211) is smooth, and the inner wall of the second connecting sub-channel (11212) is threaded. The body (1) has a second connecting hole (13), which is connected to the second connecting channel (1121).

2. The cover according to claim 1, characterized in that, The radial inner wall thickness of the first connecting channel (1111) is greater than or equal to 5 mm.

3. The cover according to claim 1, characterized in that, The side of the second sub-part (112) facing the first sub-part (111) is a plane.

4. A marine seismic node acquisition component, characterized in that, The components include the cover and the piezoelectric detector (2) as described in any one of claims 1 to 3. When the component is configured for installation and use, one end of the piezoelectric detector (2) passes through the first connecting channel (1111) and the receiving space (113) and enters the second connecting channel (1121).

5. The marine seismic node acquisition component according to claim 4, characterized in that, The piezoelectric detector (2) includes a body (21) and a nut (22). The nut (22) is sleeved on one end of the body (21), and the cross-sectional area of ​​the first connecting channel (1111) is greater than the cross-sectional area of ​​the nut (22).

6. A marine seismic node acquisition device, characterized in that, The device includes a cover as described in any one of claims 1 to 3, or a marine seismic node acquisition component as described in any one of claims 4 to 5.

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