CN114814948A

CN114814948A - Seabed node

Info

Publication number: CN114814948A
Application number: CN202210408848.2A
Authority: CN
Inventors: 李铭; 张袁祥; 翟慧杰; 王智瑞; 于强; 朱耀强
Original assignee: China Oilfield Services Ltd
Current assignee: China Oilfield Services Ltd
Priority date: 2022-04-19
Filing date: 2022-04-19
Publication date: 2022-07-29

Abstract

The invention relates to the field of petroleum detection, in particular to a seabed node, which comprises a shell, wherein the shell is a hollow structure with at least one end provided with an opening; the support frame is inserted into the shell through the opening; the end cover is arranged at the opening in a sealing manner; the detection device is arranged on the support frame; the signal receiver is arranged on the end cover in a penetrating mode in a sealing mode, the part, located in the shell, of the signal receiver is electrically connected with the detection device, and the signal receiver is used for receiving signals in water. Through the mode, the problems that the structure of the seabed node is complex, the workload is large, the working procedures are complicated and the assembly difficulty is large in the production and processing process are solved.

Description

Seabed node

Technical Field

The invention belongs to the field of oil exploration, and particularly relates to a seabed node.

Background

An Ocean Bottom Node (OBN) is a multi-component seismograph which is located on the Ocean Bottom and can independently acquire and record seismic signals. The method comprises the steps that seabed nodes are distributed on the seabed through a node collecting and releasing ship, the seabed nodes are supplied with power by self-contained batteries, the seismic source ship carries out seismic source excitation tasks after all the seabed nodes are distributed, and after the seismic source ship finishes excitation of all seismic source points, the node collecting and releasing ship recovers the seabed nodes located on the seabed and downloads data in the seabed nodes for processing and analysis. The existing seabed node has a complex structure, complex manufacturing procedures and high assembly difficulty of components.

Disclosure of Invention

In order to solve the problems, the invention provides a seabed node, which solves the problems of complicated structure, complicated manufacturing procedure and high assembly difficulty of components of the seabed node.

The invention provides a seabed node which comprises a shell, a support frame, an end cover, a detection device and a signal receiver, wherein the shell is of a hollow structure, at least one end of the shell is provided with an opening, the support frame is inserted into the shell through the opening, the end cover is sealed and arranged at the opening, the detection device is arranged on the support frame, the signal receiver is hermetically arranged on the end cover in a penetrating way, the part of the signal receiver, which is positioned in the shell, is electrically connected with the detection device, and the signal receiver is used for receiving signals in water.

Through installing detection device on the support frame to seal the support frame and plant inside the casing, make whole seabed node casing simple structure, need not to carry out the preliminary treatment to casing inner structure when the casing die sinking, and the detection device that the structure of support frame can be installed as required adjusts, and is nimble changeable, seabed node simple structure, convenient production and assembly.

In some embodiments, the two ends of the casing are provided with openings, the number of the end covers is two, the end covers are respectively covered on the two openings, the support frame comprises an installation portion and a connection portion, the connection portion is located at the two ends of the installation portion, the detection device is arranged on the installation portion, and the connection portions at the two ends are respectively fixedly connected with the two end covers. Through setting up both ends open-ended casing and matching two end covers, can be so that the carriage after having installed detection device, will be equipped with signal receiver's end cover and support frame threaded connection earlier, fix another end cover seal at an opening part of casing again, with the support frame directly from another opening part of casing whole the inserting, will be equipped with signal receiver's end cover and casing again and fix, accomplish and equip easy operation, convenience.

In some embodiments, the subsea node further includes a battery, the mounting portion divides a space between the two connecting portions in the housing into a first receiving cavity and a second receiving cavity along a radial direction of the housing, the battery is disposed on a side of the mounting portion facing the first receiving cavity, the detection device is disposed on a side of the mounting portion facing the second receiving cavity, and the battery is electrically connected to the detection device. Through with the installation portion on the support frame with the space share first holding chamber and second holding chamber in the casing, set up the battery in the installation department towards one side in first holding chamber, set up detection device in the installation department towards one side in second holding chamber for detection device on the support frame is overall arrangement more reasonable, and the structure is compacter, reduces seabed node whole volume, reduces the material, saves the cost.

In some embodiments, a one-way valve is disposed on the end cap at a position opposite to the second receiving cavity, and the one-way valve is used for exhausting gas in the first receiving cavity and the second receiving cavity. Through the setting of unidirectional valve and the relative position in second holding chamber on the end cover for the gas that the battery in first holding intracavity produced can in time be discharged by unidirectional valve, has guaranteed that seabed node can keep in a safe within range in the inside atmospheric pressure of working process second holding chamber, can not influence the normal work of the inside detection device of casing.

In some embodiments, a watertight connector is hermetically inserted into a position of the end cover opposite to the second accommodating cavity, a portion of the watertight connector located in the casing is electrically connected with the detection device and the battery, and the watertight connector is used for electrically connecting the detection device with external electronic equipment and charging the battery. Through setting up the watertight connector in the position relative with second holding chamber on the end cover for the distance is more closely between watertight connector and the detection device, and the line is walked to the casing inside of being convenient for.

In some embodiments, the subsea node further includes an acoustic transponder and a protective shell, the acoustic transponder is disposed adjacent to the casing in the protective shell, the protective shell includes a first protective shell and a second protective shell, and the first protective shell and the second protective shell are fastened to each other on the acoustic transponder and the casing and connected to each other, so that the first protective shell and the second protective shell are sleeved on the acoustic transponder and the casing. The acoustic transponder and the shell are adjacently arranged in the protective shell, so that the position of the seabed node can be determined according to signals sent by the acoustic transponder after the seabed node is thrown into the seabed, the recovery operation is performed, and the first protective shell and the second protective shell are mutually buckled on the shell and connected together, so that the protective shell is more convenient to assemble.

In some embodiments, the subsea node further comprises a first connecting member and a second connecting member, and the first connecting member and the second connecting member are fastened to each other by two sides where the first protective shell and the second protective shell abut against each other and are connected by a threaded connecting member, so as to fix the first protective shell and the second protective shell to each other. The first connecting piece and the second connecting piece are buckled at the joint of the first protective shell and the second protective shell through the screws, so that the first protective shell and the second protective shell are more firmly fixed on the shell and are not easy to separate.

In some embodiments, the protective shell is cylindrical, and the annular side surface of the protective shell has two opposite planes, and the planes and the mounting portion are arranged in parallel. Through two planes of the protective shell and the installation part in the shell, the batteries and the detection devices on two sides of the installation part are parallel to the plane of the protective shell, so that when the seabed node is placed on the seabed, the plane of the protective shell is in contact with the seabed, the batteries and the detection devices on two sides of the installation part are in a horizontal state, and the work is more stable.

In some embodiments, the annular side of the protective case also has two opposing arcs, the arcs lying between two planes. By arranging the two opposite cambered surfaces on the side wall of the protective shell and positioning the cambered surfaces between the two planes, when the submarine node is thrown into the sea, if the cambered surfaces of the protective shell are landed, the submarine node can deflect immediately under the influence of gravity and seawater flow, and finally the planes land, so that the submarine node is prevented from overturning again in the working process, and the influence on the processing of seismic signals in the later period is avoided.

In some embodiments, a plurality of protrusions are respectively arranged on the two planes at intervals, and the protrusions are used for embedding into sediment on the sea bottom to fix the protective shell on the sea bottom. The plurality of the protruding parts are arranged on the plane of the protective shell at intervals respectively, so that the protruding parts go deep into the sediment on the seabed, the friction force between the protective shell and the seabed contact surface is increased, the seabed node cannot deviate due to the flowing of seawater on the seabed, and the measuring accuracy of the seabed node is improved.

The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is an exploded view of a subsea node according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an end cover and a support frame of a subsea node according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of the interior of a subsea node housing provided by an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of another view angle inside the subsea node casing according to the embodiment of the present invention;

fig. 5 is a schematic perspective view of a subsea node according to an embodiment of the present invention.

The reference numbers in the detailed description are as follows:

the subsea node comprises a subsea node 100, a housing 110, a first housing cavity 111, a second housing cavity 112, an opening 113, a support frame 120, a connecting portion 121, a rubber ring 121a, a mounting portion 122, an end cover 130, a first groove 131, a one-way valve 132, a watertight connector 133, a detection device 140, a signal receiver 150, a piezoelectric sensor 151, a power supply device 160, an acoustic transponder 170, a protective shell 180, a first protective shell 181, a second groove 181a, a through hole 181b, a protective structure 181c, a second protective shell 182, a first connecting piece 183, a second connecting piece 184, a first bent portion 185, a fishing groove 185a, a second bent portion 186, a plane 187, a protruding portion 187a, and an arc surface 188.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the terms "comprising" and "having," and any variations thereof, in the description and claims of this invention and the description of the above figures, are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present invention, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary-secondary relationship of the technical features indicated.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of the embodiment of the present invention, the term "and/or" is only one kind of association relationship describing the association object, and means that there may be three relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the description of the embodiments of the present invention, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two sets), "plural pieces" means two or more (including two pieces).

In the description of the embodiments of the present invention, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientations and positional relationships indicated in the drawings, which are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention.

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

An Ocean Bottom Node (OBN) is a multi-component seismograph which is located on the Ocean Bottom and can independently acquire and record seismic signals. The method comprises the steps that seabed nodes are distributed on the seabed through a node collecting and releasing ship, the seabed nodes are supplied with power by self-contained batteries, the seismic source ship carries out seismic source excitation tasks after all the seabed nodes are distributed, and after the seismic source ship finishes excitation of all seismic source points, the node collecting and releasing ship recovers the seabed nodes located on the seabed and downloads data in the seabed nodes for processing and analysis. The submarine node has high flexibility, the system is convenient to arrange and recover, all-dimensional fidelity data can be obtained, the seismic imaging quality is improved, and the repeatability of four-dimensional exploration is improved.

The casing of current seabed node divide into two parts, and the group battery is placed to some inside, and components and parts such as circuit board are placed to another part inside, because the function that two parts casing realized is different, so structurally also there is some difference, and two parts casing need carry out different forms's processing to owing to need fix respectively various components and parts in the casing of two parts during later stage assembly, then assemble into a whole again, therefore the work load of assembly is great, the process is more loaded down with trivial details.

Based on the problems, the invention provides a seabed node, the shell is arranged into a hollow integrated structure, and at least one end of the shell is provided with an opening, so that a support frame on which a detection device is arranged can be directly inserted into the shell, in the specific assembly process, the detection device can be integrally arranged on the support frame firstly, then the support frame is inserted into the shell, and an end cover is covered at the opening of the shell, so that the sealing property of the internal detection device is ensured, the whole structure of the seabed node is stable and reliable, the assembly is convenient, and the structure for installing the detection device is not required to be arranged on the shell, so that the whole structure of the shell is simple, and the mould opening and the production are convenient. Meanwhile, the signal receiver which can be contacted with seawater needs to be arranged on the seabed node, the shell structure is also complicated when the signal receiver is arranged on the shell, and on the basis, the simple structure of the end cover is considered, so that the assembly process of the signal receiver which is sealed and arranged on the end cover in a penetrating mode is more convenient.

Referring to fig. 1, fig. 1 is a schematic diagram of an explosion structure of a subsea node according to an embodiment of the present invention. The seabed node 100 comprises a shell 110, a support frame 120, an end cover 130, a detection device 140 and a signal receiver 150, wherein the shell 110 is a hollow structure, at least one end of the shell 110 is provided with an opening 113, the support frame 120 is inserted into the shell 110 through the opening 113, the end cover 130 is sealed and arranged at the opening 113, the detection device 140 is arranged on the support frame 120, the signal receiver 150 is sealed and arranged on the end cover 130 in a penetrating manner, the part of the signal receiver 150, which is positioned in the shell 110, is electrically connected with the detection device 140, and the signal receiver 150 is used for receiving signals in water.

The housing 110 is used for accommodating main components in the subsea node 100, such as the support frame 120, the detection device 140, the power supply device 160, and the like, and the housing 110 provides a closed accommodating space for the components. The housing 110 may have a hollow cylindrical structure with an opening 113 at one end, or may have a hollow structure with another shape with an opening 113 at one end, such as a rectangular parallelepiped structure.

The supporting frame 120 is used for providing a mounting platform for the detecting device 140, the supporting frame 120 is inserted into the casing 110 from the opening 113 of the casing 110, and the end cover 130 is used for sealing the opening 113 of the casing 110 and forms a closed space together with the casing 110.

The end cap 130 may have a circular or square shape, which matches the shape of the opening 113, a rubber ring is disposed on the end cap 130 to seal the opening 113 of the housing 110, a signal receiver 150 is disposed on an end surface of the end cap 130, and a contact portion between the signal receiver 150 and the end cap 130 is sealed by a sealing material (e.g., a sealing ring, a sealant, etc.).

Detection device 140 can install on support frame 120 through modes such as threaded connection spare, joint, detection device 140 can include the battery control panel, the data processing memory board, the integrated MEMS sensor etc. inside the module, wherein the battery control panel realizes using power supply unit 160 and the control of charge-discharge, the control etc. of power supply unit 160 state, the data processing memory board realizes carrying out preliminary treatment and storage to the signal of gathering, the MEMS sensor is used for detecting the low frequency particle motion, and then detects seismic wave data.

The signal receiver 150 may include a piezoelectric sensor 151, one end of the piezoelectric sensor 151 is directly exposed to the ambient water through the end cap 130, and the other end of the piezoelectric sensor 151 is electrically connected to the detection device 140 inside the housing 110, and the piezoelectric sensor 151 is configured to measure the water pressure under water, convert the water pressure signal under water into an electrical signal, and send the electrical signal to the detection device 140 for further data analysis and processing.

When the device is installed, the detection device 140 is fixed on the support frame 120, one end of the support frame 120 is fixed with the end cover 130, the support frame 120 is inserted into the shell 110 from the opening 113 of the shell 110, after the support frame 120 is completely inserted into the shell 110, the opening 113 of the shell 110 is sealed by the end cover 130, and finally the end cover 130 and the shell 110 are fixed together by screws.

By installing the detection device 140 on the support frame 120 and inserting the support frame 120 inside the housing 110 in a sealing manner, the whole structure of the housing 110 of the subsea node 100 is simple, the internal structure of the housing 110 does not need to be pretreated when the housing 110 is opened, the structure of the support frame 120 can be adjusted according to the detection device 140 installed as required, and the subsea node 100 is flexible and changeable, has a simple overall structure, and is convenient to produce and assemble.

Referring to fig. 1, in some embodiments, two openings 113 are disposed at two ends of the housing 110, two end caps 130 are respectively disposed on the two openings 113, the supporting frame 120 includes an installation portion 122 and a connection portion 121, the connection portion 121 is disposed at two ends of the installation portion 122, the detection device 140 is disposed on the installation portion 122, and the connection portions 121 at two ends are respectively fixedly connected to the two end caps 130.

Referring to fig. 2, fig. 2 is a schematic structural diagram of an end cap and a support frame of a subsea node according to an embodiment of the present invention. In the two end covers 130, one of the end covers 130 is provided with a signal receiver 150 in a penetrating manner, the other end cover 130 is provided with a first groove 131, the mounting portion 122 in the supporting frame 120 is used for providing a mounting position for the detection device 140, the detection device 140 can be mounted on the mounting portion by means of threaded connection, clamping connection, and the like, the mounting portion 122 can be integrated with the connecting portion 121, or the connecting portion 121 can be connected to two ends of the mounting portion 122 by means of a threaded connection, as shown in fig. 2, the connecting portion 121 at one end of the mounting portion 122 is connected with the end cover 130 provided with the signal receiver 150 by means of threads, the connecting portion 121 at the other end can be provided with a rubber ring 121a at one end away from the mounting portion 122, the rubber ring 121a is used for abutting against the first groove 131 on the other end cover 130 after the supporting frame 120 is inserted into the casing 110, so as to fix the other end of the supporting frame 120, so that the supporting bracket 120 is not shifted within the housing 110.

Through the arrangement of the shell 110 with the openings 113 at the two ends and the matching of the two end covers 130, after the detection device 140 is installed on the support frame 120, the end cover 130 provided with the signal receiver 150 is firstly in threaded connection with the support frame 120, then the other end cover 130 is fixed at one opening 113 of the shell 110 in a sealing manner, the support frame 120 is directly inserted into the other opening 113 of the shell 110, then the end cover 130 provided with the signal receiver 150 is fixed with the shell 110, and the equipment is completed.

Referring to fig. 3, fig. 3 is a structural diagram of an inside of a housing in a subsea node according to an embodiment of the present invention. In some embodiments, the subsea node 100 further includes a power supply device 160, the mounting portion 122 divides a space between the two connecting portions 121 in the housing 110 into a first accommodating cavity 111 and a second accommodating cavity 112 along a radial direction of the housing 110 (i.e., an arrow direction in fig. 3), the power supply device 160 is disposed on one side of the mounting portion 122 facing the first accommodating cavity 111, the detection device 140 is disposed on one side of the mounting portion 122 facing the second accommodating cavity 112, and the power supply device 160 is electrically connected to the detection device 140.

As shown in fig. 3, the mounting portion 122 may be disposed inside the housing 110 in parallel with the axis of the housing 110, the first receiving cavity 111 is used for mounting the power supply device 160, the power supply device 160 may be screwed with the mounting portion 122, the second receiving cavity 112 is used for mounting the detection device 140, the detection device 140 may be screwed with the mounting portion 122, and the power supply device 160 and the detection device 140 are electrically connected.

The power supply 160 includes a battery or other device that can provide power support to the subsea node 100.

Referring to fig. 4, fig. 4 is a schematic structural diagram of another view angle inside the seabed node casing according to the embodiment of the present invention. When the detection device 140 cannot fully utilize the inner space of the second housing cavity 112, an additional power supply device 160 may be disposed in the empty space of the second housing cavity 112 to improve the endurance of the subsea node 100.

The space in the shell 110 is divided into the first accommodating cavity 111 and the second accommodating cavity 112 by the mounting part 122 on the supporting frame 120, the power supply device 160 is arranged on the mounting part 122 towards one side of the first accommodating cavity 111, and the detection device 140 is arranged on the mounting part towards one side of the second accommodating cavity 112, so that the layout of the detection device 140 on the supporting frame 120 is more reasonable, the structure is more compact, the whole volume of the seabed node 100 is reduced, the material consumption is reduced, and the cost is saved.

Referring to fig. 4, in some embodiments, a one-way valve 132 is disposed on the end cap 130 at a position opposite to the second receiving cavity 112, and the one-way valve 132 is used for exhausting the gas in the first receiving cavity 111 and the second receiving cavity 112.

The one-way valve 132 and the signal receiver 150 can be arranged on the same end cover 130, so that the structure of the subsea node 100 is more compact, and only one end cover 130 needs to be provided with a mounting hole, and the other end cover does not need to be provided with any mounting structure, thereby saving labor.

Because the power supply device 160 generates a little gas during the use process, in order to ensure the stability inside the housing 110, the one-way valve 132 is disposed on the end cap 130 at a position opposite to the second accommodating cavity 112, so that after the subsea node 100 is used for a period of time, the one-way valve 132 can automatically open the safety valve to release the redundant gas inside the housing 110, thereby ensuring the stability of the gas pressure inside the housing 110, and preventing the gas generated by the power supply device 160 from being too high to cause the gas pressure inside the housing 110 to be too high, thereby affecting the normal operation of the internal detection device 140.

By arranging the unidirectional valve 132 on the end cover 130 at a position opposite to the second accommodating cavity 112, the gas generated by the power supply device 160 in the first accommodating cavity 111 can be discharged by the unidirectional valve 132 in time, so that the pressure inside the second accommodating cavity 112 can be kept within a safe range during the operation of the subsea node 100, and the normal operation of the detection device 140 inside the housing 110 cannot be affected.

Referring to fig. 1 again, in some embodiments, a watertight connector 133 is disposed through the end cap 130 at a position opposite to the second receiving cavity 112 in a sealing manner, a portion of the watertight connector 133 located inside the casing 110 is electrically connected to the detecting device 140 and the power supply device 160, and the watertight connector 133 is used for electrically connecting the detecting device 140 with an external electronic device and charging the power supply device 160.

Specifically, the watertight connector 133 and the end cap 130 may be inserted through the sealing ring or filled with a sealant.

The watertight connector 133 has a waterproof function, the subsea node 100 transmits data stored in the detection device 140 to an external electronic device for data analysis through the watertight connector 133, and the watertight connector 133 is disposed on the end cover 130 at a position opposite to the second receiving cavity 112, so that the distance between the watertight connector 133 and the detection device 140 is shorter, and internal wiring of the housing 110 is facilitated.

Optionally, the watertight connector 133, the signal receiver 150, and the one-way valve 132 are all disposed on the same end cover 130, so that during production, only one end cover 130 needs to be provided with a structure for mounting the watertight connector 133, the signal receiver 150, and the one-way valve 132, thereby making the overall structure of the subsea node 100 more compact, and facilitating improvement of the production efficiency of the end cover 130.

Referring to fig. 1 and 5, fig. 5 is a perspective view of a subsea node according to an embodiment of the present invention. In some embodiments, the subsea node 100 further includes an acoustic transponder 170 and a protective housing 180, the acoustic transponder 170 is disposed adjacent to the housing 110 in the protective housing 180, the protective housing 180 includes a first protective housing 181 and a second protective housing 182, and the first protective housing 181 and the second protective housing 182 are fastened to each other on the acoustic transponder 170 and the housing 110 and connected to each other, so that the first protective housing 181 and the second protective housing 182 are sleeved on the acoustic transponder 170 and the housing 110.

The acoustic transponder 170 is configured to emit an acoustic signal at given time intervals so that when the subsea node 100 is deployed on the seafloor, an operator can locate the subsea node 100 by detecting the acoustic signal emitted by the acoustic transponder 170. The acoustic signal emitted by the acoustic transponder 170 may be encoded as a unique ID signal so that the corresponding acoustic transponder 170 may be identified from the emitted acoustic signal of the unique ID.

The first protective shell 181 and the second protective shell 182 may be respectively sleeved on the left and right ends of the housing 110, a second groove 181a may be disposed outside a contact surface of the first protective shell 181 and the end cap 130, a through hole 181b may be disposed in the second groove 181a, the first protective shell 181 is sleeved on the housing 110 from one end of the end cap 130 on which the signal receiver 150 is mounted on the housing 110, when the first protective shell 181 is sleeved on the housing 110, the signal receiver 150 and the acoustic transponder 170 on the end cap 130 may contact with the external environment through the through hole 181b, a protective structure 181c as shown in fig. 1 is disposed in the second groove 181a at an edge of the through hole 181b to prevent the exposed portions of the signal receiver 150 and the acoustic transponder 170 from colliding with rocks or other hard substances on the seabed during the falling of the subsea node 100 and further damaging the signal receiver 150 and the acoustic transponder 170, the second protective shell 182 is sleeved on the shell 110 from the other end of the shell 110, and the first protective shell 181 and the second protective shell 182 are buckled on the shell 110 and connected with each other.

For the embodiment in which the watertight connector 133 is sealingly inserted into the end cap 130 at a position opposite to the second receiving cavity 112, the watertight connector 133 and the signal receiver 150 are disposed at the same end, so that the watertight connector 133 can be directly connected to an external electronic device through the through hole 181b for data transmission without opening the protective case 180.

Optionally, in some implementations, the first protective shell 181 and the second protective shell 182 may also be sleeved together from the upper end and the lower end of the shell 110, and the shell 110 is completely wrapped inside the protective shell 180, a through hole 181b is disposed on a portion of the first protective shell 181 and the second protective shell 182, which is abutted against the end cap 130 provided with the piezoelectric sensor 151, and the through hole 181b is used for enabling the signal receiver 150, the watertight connector 133, and the one-way valve 132 to directly contact with an external environment.

By arranging the acoustic transponder 170 in the protective shell 180 adjacent to the housing 110, the subsea node 100 can be positioned according to the signal sent by the acoustic transponder 170 after being launched into the seabed for recovery operations, and by snapping the first protective shell 181 and the second protective shell 182 onto each other on the housing 110 and connecting the first protective shell 181 and the second protective shell 182 together, the assembly of the protective shell 180 is facilitated.

With reference to fig. 1 and fig. 5, in some embodiments, the subsea node 100 further includes a first connecting member 183 and a second connecting member 184, where the first connecting member 183 and the second connecting member 184 are fastened to each other by two sides of a joint where the first protective shell 181 abuts against the second protective shell 182 and are connected by a threaded connection member, so as to fix the first protective shell 181 and the second protective shell 182 to each other.

The first connecting piece 183 and the second connecting piece 184 are of symmetrical strip structures, each of the first connecting piece 183 and the second connecting piece 184 is composed of a first bending portion 185 and a second bending portion 186 which are matched with the circumferential radians of the shell 110 and the acoustic transponder 170, the two groups of the first bending portions 185 and the second bending portions 186 are respectively buckled at the joint of the first protective shell 181 and the second protective shell 182, and the first protective shell 181 and the second protective shell 182 are connected with the first bending portion 185 and the second bending portion 186 through screws.

Alternatively, as shown in fig. 1 and 5, a through fishing groove 185a is provided in the first curved portion 185, and when the subsea node 100 needs to be recovered, the receiving and releasing vessel fixes the cable to the fishing groove 185a to recover the subsea node.

The first connecting piece 183 and the second connecting piece 184 are fastened at the connection position of the first protective shell 181 and the second protective shell 182 by screws, so that the first protective shell 181 and the second protective shell 182 are more firmly fixed on the housing 110 and are not easy to separate.

Referring to fig. 5 again, in some embodiments, the protective shell 180 is cylindrical, the annular side surface of the protective shell 180 has two opposite planes 187, and the planes 187 and the mounting portion 122 are parallel to each other.

By arranging the two planes 187 of the protective shell 180 in parallel with the mounting portion 122 in the housing 110, the power supply device 160 and the detection device 140 on the two sides of the mounting portion 122 are parallel with the plane 187 of the protective shell 180, so that when the subsea node 100 is placed on the seabed, the plane 187 of the protective shell 180 is in contact with the seabed, and the power supply device 160 and the detection device 140 on the two sides of the mounting portion 122 are in a horizontal state, and the operation is more stable.

With continued reference to fig. 5, in some embodiments, the annular side of the protective shell 180 further has two opposite curved surfaces 188, and the curved surfaces 188 are located between the two planes 187.

Two opposite arc surfaces 188 are arranged between two opposite planes 187 on the side surfaces of the protective shell 180, the two arc surfaces 188 and the two side surfaces jointly form the side walls of the protective shell 180, the area of the plane 187 is far larger than that of the arc surfaces 188, so that when the subsea node 100 is thrown to the seabed, if the arc surfaces 188 of the protective shell 180 are landed, the subsea node 100 can be immediately deflected through the arc surfaces 188 under the influence of gravity and the flow of seawater, and finally the plane 187 of the protective shell 180 is in contact with the seabed, if the plane of the side walls of the protective shell 180 between the two planes 187 is set to be a narrow plane, the narrow plane of the subsea node 100 can be landed after being thrown to the seabed, and the subsea node 100 can be overturned under the influence of the flow of seawater after the operation for a period of time due to the small contact area between the narrow plane and the seabed, if the ocean bottom node 100 is turned over after working for a period of time, the post-processing of the seismic signals will be affected.

By arranging two opposite arc surfaces 188 on the side wall of the protective shell 180 and locating the arc surfaces between two planes, after the submarine node 100 is thrown into the sea, if the arc surfaces 188 of the protective shell 180 land, the submarine node 100 can deflect immediately under the influence of gravity and seawater flow, and finally the planes 187 land, so that the submarine node 100 is ensured not to turn over again in the working process, and the influence on the processing of seismic signals in the later period is avoided.

With continued reference to fig. 5, in some embodiments, a plurality of protrusions 187a are spaced apart from each other on the two planes 187, and the protrusions 187a are configured to be embedded into sediment on the sea floor to fix the protective casing 180 on the sea floor.

The protrusions 187a may be strip-shaped protrusions, circular protrusions, or other protrusions that increase the friction between the protective shell 180 and the seabed, and when the plane 187 of the protective shell 180 contacts the seabed, the protrusions 187a may be inserted into the sediment in the seabed due to the gravity of the subsea node 100, so that the protective shell 180 may be more firmly fixed to the seabed.

By arranging a plurality of protrusions 187a on the plane 187 of the protective shell 180 at intervals, the protrusions 187a are deep into the sediment on the sea floor, the friction force between the protective shell 180 and the contact surface of the sea floor is increased, the sea floor node 100 is prevented from being deviated on the sea floor due to the flow of the seawater, and the measurement accuracy of the sea floor node 100 is improved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. A subsea node, comprising:

the shell is a hollow structure with at least one end provided with an opening;

the support frame is inserted into the shell through the opening;

the end cover is arranged at the opening in a sealing manner;

the detection device is arranged on the support frame;

the signal receiver is arranged on the end cover in a penetrating mode in a sealing mode, the part, located in the shell, of the signal receiver is electrically connected with the detection device, and the signal receiver is used for receiving signals in water.

2. The subsea node of claim 1, wherein the openings are disposed at both ends of the housing, and the number of the end caps is two, and the two end caps are respectively disposed on the two openings;

the support frame includes installation department and connecting portion, connecting portion are located the both ends of installation department, detection device set up in on the installation department, both ends connecting portion respectively with two end cover fixed connection.

3. A subsea node according to claim 2, characterized in that the subsea node further comprises a battery, the mounting portion divides a space between two of the connecting portions in the housing into a first receiving chamber and a second receiving chamber along a radial direction of the housing, the battery is disposed on a side of the mounting portion facing the first receiving chamber, the detection device is disposed on a side of the mounting portion facing the second receiving chamber, and the battery is electrically connected to the detection device.

4. A subsea node according to claim 3, wherein a one-way valve is provided on the end cap opposite the second receiving chamber, the one-way valve being adapted to allow gas in the first and second receiving chambers to escape.

5. The subsea node of claim 3, wherein a watertight connector is sealingly disposed through the end cap opposite to the second receiving cavity, a portion of the watertight connector within the housing is electrically connected to the detection device and the battery, and the watertight connector is configured to electrically connect the detection device to external electronic equipment and to charge the battery.

6. The subsea node of claim 1, further comprising the acoustic transponder and the protective shell, the acoustic transponder being disposed adjacent to the housing within the protective shell, the protective shell comprising a first protective shell and a second protective shell, the first protective shell and the second protective shell being snap-fit to one another over the acoustic transponder and the housing and connected such that the first protective shell and the second protective shell are sleeved over the acoustic transponder and the housing.

7. The subsea node of claim 6, further comprising a first connector and a second connector, wherein the first connector and the second connector are fastened to each other by two sides of the abutting portion of the first protective shell and the second protective shell and are connected by a threaded connector to fix the first protective shell and the second protective shell to each other.

8. A subsea node according to claim 7, characterized in that the protective hull is cylindrical, and that the annular side of the protective hull has two opposite flat surfaces, which are arranged parallel to the mounting portion.

9. The subsea node of claim 8, wherein the annular side of the protective hull further has two opposing arcs, the arcs being located between the two planes.

10. A subsea node as claimed in claim 8 or claim 9 wherein a plurality of bosses are spaced apart from each of the two planes, the bosses being adapted to engage silt in the seabed to secure the containment vessel to the seabed.