Cover body, marine seismic node acquisition assembly and marine seismic node acquisition device

Abstract

The invention discloses a cover body, a marine seismic node acquisition assembly and a marine seismic node acquisition device, and belongs to the technical field of marine oil and gas exploration. The cover body comprises a body and a first mounting part positioned on one side of the body; the first mounting part comprises a first sub-part and a second sub-part which are arranged at an interval, an accommodating space is formed between the first sub-part and the second sub-part, and a first groove is formed in the body corresponding to the accommodating space; the first sub-part is provided with a first communicating channel and at least one first communicating hole, the at least one first communicating hole is communicated with the first communicating channel, and the first communicating channel is communicated with the containing space; the second sub-part is provided with a second communication channel, and the second communication channel is communicated with the accommodating space; the axis of the first communication channel and the axis of the second communication channel are located on the same straight line. According to the cover body, the space for installing the piezoelectric detector is not easy to store sundries such as silt, the influence of the sundries on the signal receiving performance of the piezoelectric detector can be effectively avoided, and the normal use of the piezoelectric detector is ensured.

Description

Technical Field

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

[0002] As the development of offshore oil and gas resources has become an increasingly important area of ​​oil and gas resource development, offshore oil and gas exploration technology has also become increasingly important. The marine seismic node acquisition device has the advantages of wide azimuth, high coverage, and high efficiency, and is one of the main devices required for offshore oil and gas exploration.

[0003] In the related art, the shell of the marine seismic node acquisition device has an opening structure dedicated to installing a piezoelectric geophone, and the piezoelectric geophone can be fixedly installed in the opening structure. However, since the opening structure has only one side opening, there is a gap between the piezoelectric geophone placed therein and the inner wall of the structure. When the marine seismic node acquisition device is placed in the ocean for use, the water flow carrying silt will bring silt and other debris into the opening structure and retain it therein, so that the debris affects the signal receiving performance of the piezoelectric geophone, thereby affecting the normal use of the piezoelectric geophone. Summary of the invention

[0004] In view of this, the present application provides a cover body, a marine seismic node acquisition component and a device, which can effectively prevent debris from affecting 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, an embodiment of the present application provides a cover body, the cover body comprising: a body and a first mounting portion located on one side of the body;

[0007] The first mounting portion comprises a first sub-portion and a second sub-portion which are spaced apart from each other, an accommodation space is formed between the first sub-portion and the second sub-portion, and a first groove is provided on the body corresponding to the accommodation space; the first sub-portion has a first communicating channel and at least one first communicating hole, the at least one first communicating hole is communicated with the first communicating channel, and the first communicating channel is communicated with the accommodation space; the second sub-portion has a second communicating channel, and the second communicating channel is communicated with the accommodation space;

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

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

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

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

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

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

[0014] The first communicating sub-channel and the second communicating sub-channel are sequentially arranged in a direction away from the second sub-portion and are connected to each other. The inner wall of the first communicating sub-channel is smooth, and the inner wall of the second communicating sub-channel has threads.

[0015] In some embodiments, the body has a second communicating hole, and the second communicating hole is in communication with the second communicating channel.

[0016] In a second aspect, an embodiment of the present application further provides a marine seismic node acquisition component, the component comprising a cover body and a piezoelectric geophone as described in any one of the first aspects;

[0017] The assembly is configured such that when installed and used, one end of the piezoelectric detector passes through the first communication channel and the accommodation space and enters the second communication channel.

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

[0019] In a third aspect, an embodiment of the present application further provides a marine seismic node acquisition device, the device comprising a cover body as described in any one of the first aspect, or a marine seismic node acquisition assembly as described in any one of the second aspect.

[0020] The beneficial effects of the technical solution provided by the embodiments of the present application include at least:

[0021] The cover provided in the embodiment of the present application forms a storage space between the first sub-part and the second sub-part by setting the first mounting part located on one side of the body as the first sub-part and the second sub-part arranged at intervals, and the space is made large enough by providing the first groove on the body corresponding to the storage space; and the piezoelectric geophone is inserted from the first connecting channel, passes through the storage space and enters the second connecting channel by providing the first coaxial connecting channel and the second coaxial connecting channel respectively, so as to be fixedly connected to the cover. When the marine seismic node acquisition device provided with the cover is put into the ocean for use, since water and silt can flow freely in the first connecting channel, even if there is silt left in the first connecting channel, it can flow out through at least one connecting hole, so that the space where the piezoelectric geophone is installed is not easy to retain silt and other debris, which can effectively prevent the debris from affecting the signal receiving performance of the piezoelectric geophone, and ensure the normal use of the piezoelectric geophone. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A schematic diagram of the structure of a cover body provided in an embodiment of the present application;

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

[0025] Figure 3 A schematic diagram of the structure of an ocean seismic node acquisition component provided in an embodiment of the present application;

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

[0027] The reference numerals in the figures represent respectively:

[0028] 1-cover body; 11-first mounting portion; 111-first sub-portion; 1111-first communication channel; 1112-first communication hole; 112-second sub-portion; 1121-second communication channel; 11211-first communication sub-channel; 11212-second communication sub-channel; 12-first groove; 13-second communication hole; 14-third communication channel; 15-handle;

[0029] 2- piezoelectric detector; 21- main body; 22- nut; 23- connecting part;

[0030] 3-warehouse body; 31-first storage warehouse; 32-second storage warehouse; 33-third storage warehouse.

[0031] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0033] The directional nouns involved in the embodiments of the present application, such as "upper", "lower", "side", etc., are generally represented by Figure 1 The relative relationship of the orientation shown in the figure is used as the basis, and these orientation terms are used only to more clearly describe the relationship between structures, not to describe absolute orientation. When the product is placed in different postures, the orientation may change, for example, "up" and "down" may be interchangeable.

[0034] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meanings as those generally understood by those of ordinary skill in the art. Some technical terms appearing in the embodiments of the present application are explained below.

[0035] In the embodiments of the present application, the “axial direction” mentioned generally refers to the axial direction, that is, the direction of the central axis of the channel.

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

[0037] In order to make the technical solutions and advantages of the present application more clear, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0038] At present, the development of marine oil and gas resources is becoming an increasingly important field of oil and gas resource development, which makes marine oil and gas exploration technology increasingly important. In the process of marine oil and gas exploration, it is necessary to use acquisition instruments to collect seismic signal data required for oil and gas exploration. The marine seismic node acquisition device has the advantages of wide azimuth, high coverage, and high efficiency. It is one of the main devices required for marine oil and gas exploration.

[0039] In the related art, the seismic signal data required for oil and gas exploration is usually collected through the piezoelectric geophone on the marine seismic node acquisition device. The shell of the marine seismic node acquisition device has an opening structure dedicated to installing the piezoelectric geophone, and the piezoelectric geophone can be fixedly installed in the opening structure. However, since the opening structure is open on only one side, there is a gap between the piezoelectric geophone placed therein and the inner wall of the structure. When the marine seismic node acquisition device is placed in the ocean for use, the water flow carrying mud and sand will bring mud and other debris into the opening structure and retain it therein, so that the debris affects the signal receiving performance of the piezoelectric geophone, thereby affecting the normal use of the piezoelectric geophone.

[0040] In order to solve the technical problems existing in the related art, the embodiment of the present application provides a cover body, which 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 the present application, see Figure 1 The cover body includes: a body 1 and a first mounting portion 11 located at one side of the body 1 .

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

[0043] It can be understood that the first communicating channel 1111 provided on the first sub-portion 111 of the first mounting portion 11 is used to store the piezoelectric detector, and since a accommodating space 113 is provided between the first sub-portion 111 and the second sub-portion 112, at least one first communicating hole 1112 communicating with the first communicating channel 1111 is also provided on the first sub-portion 111. Therefore, when the piezoelectric detector is mounted on the first mounting portion 11, the first mounting portion 11 on which the piezoelectric detector is placed has the accommodating space 113, at least one first communicating hole 1112 and the first communicating channel 1111, three structures that are connected to the outside world. Therefore, when the cover body is placed in the ocean for use, when the water flow carrying mud and sand will bring mud and sand and other debris to the vicinity of the piezoelectric detector, these debris will be washed out by the water flow through the three structures connected to the outside world and will no longer be deposited around the piezoelectric detector, thereby ensuring that the performance of the piezoelectric detector in receiving signals is not affected.

[0044] Therefore, the cover body provided in the embodiment of the present application, by setting the first mounting portion 11 located on one side of the main body 1 as a first sub-portion 111 and a second sub-portion 112 that are spaced apart, so that an accommodating space 113 is formed between the first sub-portion 111 and the second sub-portion 112, and by providing a first groove 12 on the main body 1 corresponding to the accommodating space 113, the space is made large enough; by providing a coaxial first connecting channel 1111 and a second connecting channel 1121 in the first sub-portion 111 and the second sub-portion 112, respectively, the piezoelectric detector is inserted from the first connecting channel 1111, passes through the accommodating space 113 and enters the second connecting channel 1121, thereby being fixedly connected to the cover body. When the marine seismic node acquisition device provided with the cover is put into the ocean for use, since water and silt can flow freely in the first connecting channel 1111, even if there is silt remaining in the first connecting channel 1111, it can flow out through at least one first connecting hole 1112, so that the space for installing the piezoelectric detector is not easy to retain silt and other debris, which can effectively prevent the 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 communicating hole 1112 , a length direction of the first communicating hole 1112 is parallel to an axis of the first communicating channel 1111 and / or an axis of the second communicating 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 entering the first connecting channel 1111, mud and other debris can be more easily flushed out of the first connecting channel 1111 by the water flow.

[0047] In some embodiments, when there are multiple first communicating holes 1112 , the multiple first communicating holes 1112 are arranged in parallel and at intervals, and the intervals between two adjacent first communicating holes 1112 are 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 communicating holes 1112 may be first communicating holes 1112 with a width of 6 mm, and the interval length between the plurality of first communicating holes 1112 may be 4 mm.

[0050] Taking into account 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 5 mm to ensure that the signal reception of the piezoelectric detector is not affected by the metal surround. For example, the width of the first connecting hole 1112 can be set to 6 mm, which should not be too wide because it is necessary to ensure that the cover structure has good impact resistance.

[0051] By providing a plurality of first communicating holes 1112, for example, see Figure 1 Three first communication holes 1112 may be provided so that the mud and sand and other debris entering the first communication channel 1111 along with the water flow can be more easily washed out of the first communication channel 1111 by the water flow.

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

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

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

[0055] A plane is provided on the side of the second sub-section 112 facing the first sub-section 111. After the piezoelectric detector is installed, the plane 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 surface of the cover body close to the first sub-portion 111 and the side surface of the second sub-portion 112 facing the first sub-portion 111 is not less than 66 mm.

[0057] It is understandable that setting the distance between the side of the cover body close to the first sub-section 111 and the side of the second sub-section 112 facing the first sub-section 111 to be no less than 66 mm can effectively protect the piezoelectric detector from being damaged due to collision and falling.

[0058] In some embodiments, Figure 2 This is a schematic diagram of the structure of the second connecting channel of a cover body provided in an embodiment of the present application, see Figure 2 The second communicating channel 1121 includes a first communicating sub-channel 11211 and a second communicating sub-channel 11212 .

[0059] The first communicating sub-channel 11211 and the second communicating sub-channel 11212 are sequentially arranged in a direction away from the second sub-portion 112 and are interconnected. The inner wall of the first communicating sub-channel 11211 is smooth, and the inner wall of the second communicating sub-channel 11212 has threads.

[0060] It can be understood that the connecting part of the piezoelectric detector is divided into two parts: a sealing part and a threaded connecting part. The channel cylinder 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 connecting part of the connecting part of the piezoelectric detector to tightly fix the piezoelectric detector on the cover body, while meeting the 30MPa compressive strength required for deep water operations.

[0061] In some embodiments, the cross-sectional diameter of the first communicating 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 may be a mechanical threaded hole with a length of 7 mm.

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

[0064] Considering that the cover provided by the embodiment of the present application needs to be placed in a water depth of 3,000 meters for use, it is necessary to consider whether the strength of each structure can withstand the huge water pressure. In the embodiment of the present application, 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 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 communicating hole 13 , and the second communicating hole 13 is connected to the second communicating channel 1121 .

[0066] Through the second communicating hole 13 communicating with the second communicating channel 1121, the circuit on the piezoelectric detector is connected to the chamber body connected to the cover body.

[0067] In some embodiments, see Figure 3 The body 2 further includes a third communication channel 14 communicating with the second communication hole 13 and the second communication channel 1121 , and the axis of the third communication channel 14 and the axis of the second communication channel 1121 are located on the same straight line.

[0068] By setting up the third connecting channel 14, the connection between the circuit of the piezoelectric detector and the circuit in the warehouse body is more convenient, and the total length of the circuit can be shortened, so that the piezoelectric signal is less interfered with. 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 circuit.

[0069] In some embodiments, Figure 4 A schematic diagram of the structure of a marine seismic node acquisition device provided in an embodiment of the present application, wherein: Figure 4 The left picture is the right view of the right picture, see Figure 4 The body 1 is also provided with a handle 15.

[0070] It can be understood 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 axial direction 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] The embodiment of the present application also provides a marine seismic node acquisition component, Figure 3 A schematic diagram of the structure of an ocean seismic node acquisition component provided in an embodiment of the present application is shown in FIG. Figure 2 , the assembly includes the cover body and the piezoelectric detector 2 involved in the above embodiment;

[0072] The assembly is configured such that when installed and used, one end of the piezoelectric detector 2 passes through the first communication channel 1111 and the accommodating space 113 and enters the second communication channel 1121 .

[0073] The marine seismic node acquisition assembly provided in the embodiment of the present application is fixedly connected to the cover body by installing the piezoelectric geophone on the cover body, that is, by having one end of the piezoelectric geophone pass through the first connecting channel 1111 and the accommodating space 113 and enter the second connecting channel 1121. At the same time, the first mounting portion 11 on one side of the main body 1 of the cover body is arranged as a first sub-portion 111 and a second sub-portion 112 arranged at intervals, so that an accommodating space 113 is formed between the first sub-portion 111 and the second sub-portion 112, and the space is large enough by providing a first groove 12 on the main body 1 corresponding to the accommodating space 113; by providing a coaxial first connecting channel 1111 and a second connecting channel 1121 in the first sub-portion 111 and the second sub-portion 112, respectively, the piezoelectric geophone is inserted from the first connecting channel 1111, passes through the accommodating space 113 and enters the second connecting channel 1121, so as to be fixedly connected to the cover body. When the marine seismic node acquisition device provided with the cover is put into the ocean for use, since water and silt can flow freely in the first connecting channel 1111, even if there is silt remaining in the first connecting channel 1111, it can flow out through at least one first connecting hole 1112, so that the space for installing the piezoelectric detector is not easy to retain silt and other debris, which can effectively prevent the 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 . 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, so 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 accommodating space 113 formed between the first sub-section 111 and the second sub-section 112 and the second connecting channel 1121.

[0076] In order to ensure that the piezoelectric detector can successfully enter the accommodation space 113 formed between the first sub-section 111 and the second sub-section 112 and 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 are exemplified below:

[0077] In some embodiments, the main body 21 of the piezoelectric detector may be made of black rubber 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 may 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 main body 21 and the nut 22 are of the above-mentioned size and type, 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 body to the side of the second sub-portion 112 facing the first sub-portion 111 is not less than 66 mm, and the distance from the bottom surface of the accommodating space 113 formed between the first sub-portion 111 and the second sub-portion 112 to the center point of the second connecting channel 1121 is not less than 23.5 mm. For example, the length of the accommodating 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 further includes a connecting portion 23 , a nut 22 is sleeved on one end of the connecting portion 23 , and a cross-sectional area of ​​the second connecting channel 1121 is larger than a maximum cross-sectional area of ​​the connecting portion 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 an external thread.

[0082] It can be understood that the piezoelectric detector 2 is tightly fixed on the cover body by cooperating with the thread of the inner wall of the second connecting sub-channel 11212. Compared with the related art, the piezoelectric detector in the marine seismic node acquisition assembly provided in the embodiment of the present application omits the fixing ring groove part, and can be more conveniently installed and disassembled from the cover body.

[0083] In some embodiments, a plurality of sealing grooves are disposed on the sealing portion of the piezoelectric detector 2 , and at least one axial sealing ring and at least one radial sealing ring are disposed 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-section 112 facing the first sub-section 111 to achieve a sealing effect.

[0085] In order to ensure that the connection portion 23 of the piezoelectric detector can successfully enter the second communication channel 1121, the dimensions of the second communication channel 1121 and the connection portion 23 of the piezoelectric detector are exemplified below:

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

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

[0088] The marine seismic node acquisition device provided in the embodiment of the present application is provided with the cover structure involved in the above-mentioned embodiment, so that the space for installing the piezoelectric detector is not easy to retain debris such as mud and sand, which can effectively prevent the debris from affecting the signal receiving 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 warehouse body 3, in which a first accommodating warehouse 31, a second accommodating warehouse 32 and a third accommodating warehouse 33 are arranged, wherein the first accommodating warehouse 31 is used as a circuit warehouse, the second accommodating warehouse 32 and the third accommodating warehouse 33 are used as a first battery warehouse and a second battery warehouse respectively, and the warehouse body shell is two detachable upper and lower half-type non-metallic shells, and the warehouse body shell is connected to the circuit warehouse mounting structure, the first battery warehouse mounting structure and the second battery warehouse mounting structure on the cover body.

[0090] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0091] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

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

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

Claims

1. A cover body, characterized in that: The cover body comprises: a body (1) and a first mounting portion (11) located on one side of the body (1); The first mounting portion (11) comprises a first sub-portion (111) and a second sub-portion (112) which are arranged at an interval, an accommodating space (113) is formed between the first sub-portion (111) and the second sub-portion (112), and a first groove (12) is provided on the body (1) corresponding to the accommodating space (113); the first sub-portion (111) has a first communicating channel (1111) and at least one first communicating hole (1112), the at least one first communicating hole (1112) is communicated with the first communicating channel (1111), and the first communicating channel (1111) is communicated with the accommodating space (113); the second sub-portion (112) has a second communicating channel (1121), and the second communicating channel (1121) is communicated with the accommodating space (113); Wherein, the axis of the first connecting channel (1111) and the axis of the second connecting channel (1121) are located on the same straight line.

2. The cover according to claim 1, characterized in that: For each first communicating hole (1112), the length direction of the first communicating hole (1112) is parallel to the axis of the first communicating channel (1111) and / or the axis of the second communicating channel (1121).

3. The cover according to claim 1, characterized in that: When there are a plurality of first communicating holes (1112), the plurality of first communicating holes (1112) are arranged in parallel and at intervals, and the intervals between two adjacent first communicating holes (1112) are the same.

4. 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.

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

6. The cover according to claim 1, characterized in that: The second communication channel (1121) includes a first communication sub-channel (11211) and a second communication sub-channel (11212); The first communicating sub-channel (11211) and the second communicating sub-channel (11212) are arranged in sequence in a direction away from the second sub-portion (112) and are connected to each other. The inner wall of the first communicating sub-channel (11211) is smooth, and the inner wall of the second communicating sub-channel (11212) has threads.

7. The cover according to claim 1, characterized in that: The body (1) has a second communicating hole (13), and the second communicating hole (13) is in communication with the second communicating channel (1121).

8. A marine seismic node acquisition component, characterized in that: The assembly comprises a cover as claimed in any one of claims 1 to 7 and a piezoelectric detector (2); The assembly is configured such that, when installed and used, one end of the piezoelectric detector (2) passes through the first connecting channel (1111) and the accommodating space (113) and enters the second connecting channel (1121).

9. The marine seismic node acquisition component according to claim 8, characterized in that: The piezoelectric detector (2) comprises a main body (21) and a nut (22), wherein 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 greater than the cross-sectional area of ​​the nut (22).

10. A marine seismic node acquisition device, characterized in that: The device comprises the cover body as described in any one of claims 1 to 7, or the marine seismic node acquisition assembly as described in any one of claims 8 to 9.

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