A geophone fixture, ocean node acquisition station, and related methods

Abstract

The application discloses a kind of geophone fixing device, ocean node acquisition station and related method.The kind of geophone fixing device includes: geophone fixing framework, the geophone fixing framework is opened in three mutually perpendicular directions respectively with the accommodating cavity for accommodating three omnidirectional geophone;Geophone pressing plate is set on the geophone fixing framework, for fixing omnidirectional geophone in accommodating cavity;Supporting component is set on the top of the geophone fixing framework, and it is telescopic in height direction, in the state that the geophone fixing device is equipped in ocean node acquisition station, the supporting component is telescopic adjustment to support the geophone fixing framework in height direction.The geophone fixing device and the ocean node acquisition station using the geophone fixing device provided by the application can effectively improve the acquisition quality of seismic signal.

Description

Technical Field

[0001] This invention relates to the field of marine geophysical exploration technology, and in particular to a detector fixing device, a marine node acquisition station, and related methods. Background Technology

[0002] A marine node acquisition station is a type of marine seismic acquisition device without transmission cables. It contains three omnidirectional moving-coil geophones (hereinafter referred to as omnidirectional geophones) that can automatically and continuously acquire and store seafloor seismic data, thereby obtaining complete seismic data. The acquisition station requires the three omnidirectional geophones to be positioned in three mutually perpendicular directions, namely the X, Y, and Z directions. The marine node acquisition station acquires seismic shear wave signals in the X and Y directions and seismic P-wave signals in the Z direction, while also requiring the three omnidirectional geophones to be installed as close as possible to each other. These three omnidirectional geophones are also known as three-component geophones.

[0003] In the existing structure of marine node acquisition stations, three omnidirectional geophones are mounted on cylindrical nylon supports and fixed to the end cap of one of the cylinders. This means that there is no rigid connection between the nylon outer shell of the marine node acquisition station and the seabed. The inner metal double-cylinder shell is connected to the nylon outer shell, and the three-component geophones are then connected to the metal shell via the cylindrical end cap. The coupling between the three-component geophones and the seabed is not tight, resulting in weak seismic signals acquired by the marine node acquisition station, which makes it impossible to achieve deep and high-precision exploration. Summary of the Invention

[0004] In view of the above problems, the present invention is proposed to provide a detector fixing device, a marine node acquisition station and related methods to overcome or at least partially solve the above problems.

[0005] In a first aspect, embodiments of the present invention provide a detector fixing device for fixing a three-component detector in the housing of an ocean node acquisition station, comprising:

[0006] The detector fixing frame has receiving cavities for accommodating three omnidirectional detectors in three mutually perpendicular directions.

[0007] A detector pressure plate is disposed on the detector fixing frame and is used to fix the omnidirectional detector in the receiving cavity;

[0008] A support component is disposed on the top of the detector fixing frame and is telescopic in the height direction. When the detector fixing device is assembled in the marine node acquisition station, the support component can be telescopically adjusted to support the detector fixing frame in the height direction.

[0009] Furthermore, the detector fixing frame is in the shape of a cube, the receiving cavity is respectively arranged in three mutually perpendicular directions, and the opening of the receiving cavity is respectively opened on three mutually perpendicular and adjacent faces.

[0010] Furthermore, the aforementioned detector fixing device also includes: a plurality of connecting screws; the detector fixing frame is also provided with a plurality of first threaded holes, and when the detector fixing device is assembled in the marine node acquisition station, the connecting screws are threadedly connected to the shell of the marine node acquisition station through the first threaded holes.

[0011] Furthermore, the aforementioned support components include: a support sleeve and a support screw;

[0012] The top of the detector fixing frame is provided with a second threaded hole;

[0013] One end of the support screw is connected to the second threaded hole, and the other end is threadedly connected to the support screw sleeve;

[0014] The support sleeve is rotatable to move vertically along the axis of the support screw.

[0015] Furthermore, the support sleeve is prismatic in shape, with a third threaded hole at its center along the height direction. The support screw is connected to the support sleeve through the third threaded hole.

[0016] Secondly, embodiments of the present invention provide a marine node acquisition station, including a housing and a three-component geophone disposed within the housing, characterized in that the three omnidirectional geophones of the three-component geophone are fixedly connected to the housing by the aforementioned geophone fixing device, and the supporting component abuts against the housing.

[0017] Furthermore, the housing includes a first sidewall and a second sidewall, and the first sidewall and the second sidewall are disposed opposite to each other;

[0018] A transverse connecting plate is provided between the first sidewall and the second sidewall, and the two ends of the transverse connecting plate are fixedly connected to the first sidewall and the second sidewall respectively.

[0019] The connecting screw is threadedly connected to the transverse connecting plate through the first threaded hole on the detector fixing frame.

[0020] Furthermore, the bottom of the detector fixing frame abuts against the first sidewall; the upper surface of the support screw sleeve abuts against the second sidewall.

[0021] Furthermore, the three omnidirectional detectors of the three-component detector are respectively disposed in three receiving cavities on the detector fixing frame, and the detector pressure plate presses against the end face of the omnidirectional detector exposed from the receiving cavity.

[0022] Thirdly, embodiments of the present invention provide an assembly method for a marine node data collection station as described above, comprising:

[0023] The omnidirectional detectors in the X, Y and Z directions are respectively installed in the corresponding receiving cavities on the detector fixing frame;

[0024] The omnidirectional detector is pressed down using a detector clamping plate;

[0025] The detector fixing device, which is equipped with omnidirectional detectors in three directions, is installed into the shell of the marine node acquisition station, and the bottom of the detector fixing frame abuts against the shell.

[0026] The detector mounting frame is fixedly connected to the transverse connecting plate inside the housing;

[0027] Adjust the support component until its upper surface abuts against the housing to support the detector mounting frame.

[0028] Fourthly, embodiments of the present invention provide a method for acquiring seismic signals using a marine node acquisition station as described above.

[0029] The beneficial effects of the above-described technical solutions provided in the embodiments of the present invention include at least the following:

[0030] The geophone fixing device and marine node acquisition station provided in this embodiment of the invention, when the three-component geophone is installed inside the marine node acquisition station, are tightly pressed against the geophone fixing frame by a geophone pressure plate. Furthermore, while the entire geophone frame is fixedly connected to the housing, it also abuts against the housing through supporting components, ensuring tight coupling between the geophone frame and the marine node acquisition station. This guarantees complete constraint in the X, Y, and Z axes, achieving better coupling between the three-component geophone and the marine node acquisition station. Consequently, the acquired seismic shear wave signals in the X and Y directions, and the seismic P-wave signals in the Z direction, are more accurate, effectively improving the quality of seismic signal acquisition.

[0031] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings.

[0032] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0033] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0034] Figure 1 This is a schematic diagram of the detector fixing device provided in an embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of the detector fixing frame provided in an embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of the internal structure of a marine node data collection station provided in an embodiment of the present invention;

[0037] Figure 4 A flowchart illustrating the assembly method of a marine node data acquisition station provided in an embodiment of the present invention.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1-Detector mounting device; 11-Detector mounting frame; 12-Detector pressure plate; 13-Support screw sleeve;

[0040] 14-Support screw; 15-Connecting screw; 16-Receiving cavity; 17-Second threaded hole;

[0041] 2-Marine node data collection station; 3-Shell; 31-First sidewall; 32-Second sidewall; 33-Transverse connecting plate;

[0042] 4-Omnidirectional detector. Detailed Implementation

[0043] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0044] This invention provides a detector fixing device for fixing a three-component geophone within the housing of an ocean node data acquisition station, as shown in the following embodiment. Figure 1 As shown, the detector fixing device 1 includes:

[0045] The detector mounting frame 11 has receiving cavities 16 in three mutually perpendicular directions for accommodating three omnidirectional detectors.

[0046] The detector pressure plate 12 is disposed on the detector fixing frame 11 and is used to fix the omnidirectional detector in the receiving cavity 16.

[0047] A support component is disposed on the top of the detector fixing frame 11 and is telescopic in the height direction. When the detector fixing device is assembled in the marine node acquisition station, the support component can be telescopically adjusted to support the detector fixing frame 11 in the height direction.

[0048] Furthermore, the detector fixing frame 11 is in the shape of a cube, and the receiving cavity 16 is respectively arranged in three mutually perpendicular directions, and the opening of the receiving cavity is respectively opened on three mutually perpendicular and adjacent faces.

[0049] The detector mounting frame 11 can be made of a material with high mechanical strength and hardness, and high rigidity, such as nylon 66 (polyhexamethylene adipamide, a thermoplastic resin). Compared with metal materials, it has higher strength but lighter weight, which can reduce the total weight of the marine node acquisition station while meeting the structural reliability requirements.

[0050] These three mutually perpendicular directions correspond to the X, Y, and Z directions, respectively, which correspond to two directions of the seismic shear wave signal (X and Y directions) and one direction of the seismic P-wave signal (Z direction).

[0051] The size of the receiving cavity is adapted to the shape and size of the omnidirectional detector to ensure that the omnidirectional detector will not wobble in the radial direction after being placed in it, thus meeting the fastening requirements of the omnidirectional detector.

[0052] Reference Figure 1 and 2 As shown, the omnidirectional detector is cylindrical, and the cavity 16 is also cylindrical.

[0053] Each receiving cavity 16 has an opening to facilitate the insertion of an omnidirectional detector, and the detector pressure plate 12 can be fixed near the opening, for example, by self-tapping screws, to press and fix the omnidirectional detector in the receiving cavity.

[0054] Furthermore, the aforementioned detector fixing device, refer to Figure 1 As shown, it also includes: several connecting screws 15; the detector fixing frame 11 is also provided with several first threaded holes, and when the detector fixing device is assembled in the marine node acquisition station, the connecting screws 15 are threadedly connected to the shell of the marine node acquisition station through the first threaded holes.

[0055] Furthermore, the supporting components in the aforementioned detector fixing device include: a supporting screw sleeve 13 and a supporting screw 14;

[0056] Reference Figure 2 The detector mounting frame 11 shown has a second threaded hole 17 at its top.

[0057] One end of the support screw 14 is connected to the second threaded hole, and the other end is threaded to the support screw sleeve 13;

[0058] The support sleeve 13 is rotatable to move up and down in height along the axis of the support screw 14.

[0059] The support screw 14 has fine threads on its surface and can be made of stainless steel, such as stainless steel 316.

[0060] Furthermore, the support sleeve 13 is prismatic in shape, with a third threaded hole at its center along the height direction. The support screw 14 is connected to the support sleeve 13 through the third threaded hole.

[0061] For example, refer to Figure 1 As shown, the support sleeve 13 is hexagonal prism-shaped and has 6 different sides, which makes it easy to grip and rotate to tighten the support sleeve 13.

[0062] The material of the supporting screw sleeve 13 is similar to that of the detector fixing frame 11. It can be a material with high mechanical strength and hardness and high rigidity to provide better support, such as nylon 66. Of course, other metal materials can also be used, but this embodiment of the invention does not limit this.

[0063] This invention also provides a marine node data collection station 2, as described in the following embodiment. Figure 3 As shown, it includes a housing 3 and a three-component detector disposed within the housing, characterized in that the three omnidirectional detectors 4 of the three-component detector are fixedly connected to the housing 3 through the aforementioned detector fixing device 1.

[0064] It should be noted that the shell of the marine node data collection station is sealed. Figure 3 The marine node acquisition station shown only illustrates the structural parts related to the three-component detector that can be seen after opening the casing. Other circuit and mechanical structural parts are not shown. Those skilled in the art can understand the overall structure of the marine node acquisition station provided in this embodiment of the invention based on existing technology. The following is a detailed description of the structural parts related to the three-component detector.

[0065] Reference Figure 3 As shown, the housing 3 includes a first sidewall 31 and a second sidewall 32, and the first sidewall 31 and the second sidewall 32 are disposed opposite to each other;

[0066] A transverse connecting plate 33 is provided between the first sidewall 31 and the second sidewall 32, and the two ends of the transverse connecting plate 33 are fixedly connected to the first sidewall 31 and the second sidewall 32 respectively.

[0067] The first threaded hole can be a through hole, see reference. Figure 3 As shown, the connecting screw 15 is threadedly connected to the transverse connecting plate 33 through the first threaded hole on the detector fixing frame 11.

[0068] In one embodiment, the bottom of the detector fixing frame 11 abuts against the first sidewall 31; the upper surface of the support screw sleeve 13 abuts against the second sidewall 32.

[0069] The support bushing is connected to the support screw 14 by threads. The top of the detector fixing frame 11 has a first threaded hole, so the support bushing can rotate and move up and down in the axial direction of the support screw 14. In order to achieve tight coupling with the housing, the support bushing 13 will rotate to the position of pressing against the second side wall.

[0070] In one embodiment, the three omnidirectional detectors 4 of the three-component detector are respectively disposed in three receiving cavities on the detector fixing frame 11, and the detector pressure plate 12 presses the end face of the omnidirectional detector 4 exposed from the receiving cavity.

[0071] from Figure 2 It can be seen that the detector pressure plate 12 can not only prevent the omnidirectional detector from moving along the axial direction, but also prevent the omnidirectional detector from shaking in the radial direction.

[0072] Reference Figure 2 As shown, the three omnidirectional detectors 4 of the three-component detector are respectively installed in the three receiving cavities on the detector fixing frame 11, and the detector pressure plate 12 presses the end face of the omnidirectional detector 4 exposed from the receiving cavity.

[0073] The geophone fixing device and marine node acquisition station provided in this embodiment of the invention, when the three-component geophone is installed inside the marine node acquisition station, are tightly pressed against the geophone fixing frame by a geophone pressure plate. Furthermore, while the entire geophone frame is fixedly connected to the housing, it also abuts against the housing through supporting components, ensuring tight coupling between the geophone frame and the marine node acquisition station. This guarantees complete constraint in the X, Y, and Z axes, achieving better coupling between the three-component geophone and the marine node acquisition station. Consequently, the acquired seismic shear wave signals in the X and Y directions, and the seismic P-wave signals in the Z direction, are more accurate, effectively improving the quality of seismic signal acquisition.

[0074] Based on the same inventive concept, this invention also provides an assembly method for the marine node data collection station provided in the foregoing embodiments, referring to... Figure 4 As shown, it includes the following steps:

[0075] S41. Install the omnidirectional detectors in the X, Y and Z directions into the corresponding receiving cavities on the detector fixing frame respectively;

[0076] S42. Use the detector clamping plate to press the omnidirectional detector;

[0077] S43. Install the detector fixing device with three omnidirectional detectors into the shell of the marine node acquisition station, with the bottom of the detector fixing frame abutting against the shell.

[0078] S44. Fix the detector mounting frame to the transverse connecting plate inside the housing;

[0079] S45. Adjust the support components until the upper surface of the support components abuts against the housing to support the detector's fixed frame.

[0080] The definitions of the X, Y, and Z directions mentioned above can be referred to the implementation methods of the aforementioned detector fixing device and marine node acquisition station, and will not be repeated here.

[0081] This invention also provides a method for acquiring seismic signals using a marine node acquisition station. This method uses the marine node acquisition station provided in the foregoing embodiments to acquire seismic shear wave signals in the X and Y directions and seismic P-wave signals in the Z direction. The specific acquisition process can be found in existing technologies and will not be repeated here.

[0082] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A detector fixing device (1) for fixing a three-component detector in the shell (3) of an ocean node acquisition station, characterized in that, include: The detector fixing frame (11) has receiving cavities (16) for accommodating three omnidirectional detectors in three mutually perpendicular directions. Detector pressure plate (12) is set on the detector fixing frame (11) and is used to fix the omnidirectional detector (4) in the receiving cavity (16). A support component is provided on the top of the detector fixing frame (11) and is telescopic in the height direction. When the detector fixing device (1) is assembled in the marine node acquisition station, the support component can be telescopically adjusted to support the detector fixing frame (11) in the height direction. The support component includes a support sleeve (13) and a support screw (14); the top end of the detector fixing frame (11) is provided with a second threaded hole (17); one end of the support screw (14) is connected to the second threaded hole (17), and the other end is threadedly connected to the support sleeve (13); the support sleeve (13) is rotatable to move up and down in height along the axial direction of the support screw (14).

2. The detector fixing device as described in claim 1, characterized in that, The detector fixing frame (11) is in the shape of a cube, and the receiving cavity (16) is respectively arranged in three mutually perpendicular directions, and the opening of the receiving cavity (16) is respectively opened on three mutually perpendicular and adjacent faces.

3. The detector fixing device as described in claim 1, characterized in that, Also includes: A number of connecting screws (15); the detector fixing frame (11) is also provided with a number of first threaded holes. When the detector fixing device (1) is assembled in the marine node acquisition station, the connecting screws (15) are threadedly connected to the shell (3) of the marine node acquisition station through the first threaded holes.

4. The detector fixing device as described in claim 1, characterized in that, The support sleeve (13) is prismatic and has a third threaded hole in the center along the height direction. The support screw (14) is connected to the support sleeve (13) through the third threaded hole.

5. A marine node acquisition station (2), comprising a housing (3) and a three-component detector disposed within the housing, characterized in that, The three omnidirectional detectors (4) of the three-component detector are fixedly connected to the housing (3) by the detector fixing device (1) as described in any one of claims 1-4, and the supporting member abuts against the housing (3).

6. The marine node data collection station as described in claim 5, characterized in that, The housing (3) includes a first sidewall (31) and a second sidewall (32), and the first sidewall (31) and the second sidewall (32) are disposed opposite to each other; A transverse connecting plate (33) is provided between the first sidewall (31) and the second sidewall (32), and the two ends of the transverse connecting plate (33) are fixedly connected to the first sidewall (31) and the second sidewall (32) respectively. In the case where the detector fixing device also includes several connecting screws, the connecting screws (15) are threadedly connected to the transverse connecting plate (33) through the first threaded hole on the detector fixing frame (11).

7. The marine node data collection station as described in claim 6, characterized in that, The bottom of the detector fixing frame (11) abuts against the first side wall (31); the upper surface of the support screw sleeve abuts against the second side wall (32).

8. The marine node data collection station as described in claim 6, characterized in that, The three omnidirectional detectors (4) of the three-component detector are respectively disposed in the three receiving cavities (16) on the detector fixing frame (11), and the detector pressure plate (12) presses the end face of the omnidirectional detector (4) exposed from the receiving cavity.

9. A method for assembling a marine node data collection station as described in any one of claims 6-8, characterized in that, include: The omnidirectional detectors in the X, Y and Z directions are respectively installed in the corresponding receiving cavities on the detector fixing frame; The omnidirectional detector is pressed down using a detector clamping plate; The detector fixing device, which is equipped with omnidirectional detectors in three directions, is installed into the shell of the marine node acquisition station, and the bottom of the detector fixing frame abuts against the shell. The detector mounting frame is fixedly connected to the transverse connecting plate inside the housing; Adjust the support component until its upper surface abuts against the housing to support the detector mounting frame.

10. A method for acquiring seismic signals using a marine node acquisition station as described in any one of claims 5-8.

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