A downhole geophone for geophysical exploration

Abstract

This utility model belongs to the field of geophysical exploration technology, and in particular to a downhole geophone for geophysical exploration. It includes a detection well and a connecting frame disposed on one side of the detection well. The connecting frame is connected to a connecting column via a connecting line. The connecting column is connected to the inner surface of the outer shell. Through the action of the outer shell, the support, and the guide wheels, this device can achieve stable transport and retrieval of the geophone, enabling stable geophone detection and ensuring it remains on the central axis of the detection well. This effectively guarantees the accuracy of the acquired data. In the event of borehole collapse, tension can be applied to the connecting column via the connecting line. Under the action of external resistance, the outer shell, in conjunction with the guide cylinder compression spring, and the lifting of the geophone, achieves the retrieval of the support, reducing resistance during retrieval and providing convenience for recovery.

Description

Technical Field

[0001] This utility model belongs to the field of geophysical exploration technology, specifically relating to a downhole geophone for geophysical exploration. Background Technology

[0002] Geophysical exploration refers to the discipline and technology that infers the morphology, structure, material composition and mineral distribution of underground rock strata by observing and studying the distribution and variation patterns of various physical fields of the Earth, such as gravitational field, magnetic field, electric field, electromagnetic field and seismic wave field. Geophysical engineers need to use instruments to receive signals from the physical fields inside the Earth to confirm the underground geological conditions.

[0003] According to announcement number CN219143108U, a downhole geophone for geophysical exploration is disclosed. This technology discloses a "base, with mounting mechanisms fixedly connected to both sides of the base. Each mounting mechanism includes a connecting frame fixedly connected to both sides of the base. This downhole geophone for geophysical exploration, through the coordinated use of a handle, connecting frame, threaded rod, connecting rod, and limiting pin, achieves the effect of installing the geophone. Rotating the handle drives the threaded rod to rotate, which in turn drives the connecting rod to move up and down, thereby turning the limiting pin to the surface. This facilitates the installation and fixation of the geophone, minimizing the risk of collapse due to insufficient installation. It also facilitates the installation and disassembly of the geophone, making inspection and maintenance easier, thus maximizing the service life and practicality of the geophone."

[0004] While this design allows the rotation of the threaded rod via a throttle, which in turn moves the connecting rod up and down to drive the limiting pin into the ground, facilitating the installation and fixation of the detector and minimizing the risk of collapse due to insufficient installation, it also facilitates installation, disassembly, and maintenance, thus extending the detector's lifespan and improving its practicality. However, when performing geophysical exploration, the device needs to penetrate deep into boreholes. The lack of a stable structure for the device during testing may lead to data errors and the possibility of borehole collapse. Furthermore, the device's structure hinders its retrieval, impacting the efficiency and progress of the testing work.

[0005] To address the aforementioned issues, this application proposes a downhole geophone for geophysical exploration. Utility Model Content

[0006] To address the problems mentioned in the background section, this invention provides a downhole geophone for geophysical exploration. Through the use of the outer casing, support frame, and guide wheels, it enables stable transport and retrieval of the geophone, ensuring stable geophone operation and maintaining its position on the central axis of the wellbore. This effectively guarantees the accuracy of the acquired data. In the event of borehole collapse, tension can be applied to the connecting column via the connecting line. The outer casing, under external resistance, works in conjunction with the guide cylinder to compress the spring and, through the lifting of the geophone, facilitates the retraction of the support frame, reducing resistance during retrieval and providing greater convenience.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a downhole geophone for geophysical exploration, comprising a detection well and a connecting frame disposed on one side of the detection well. The connecting frame is connected to a connecting column via a connecting line. The connecting column is connected to the inner surface of the outer shell. A geophone is also installed at one end of the connecting column. One side of the geophone is connected to one end of the support. A guide wheel is disposed at the other end of the support. A force-bearing rod connected to the connecting shaft is also disposed on the surface of the support.

[0008] As a preferred embodiment of the downhole geophysical detector of this invention, the connecting frame is mounted on the surface of the detection well, and positioning pins are installed at equal angles on the surface of the connecting frame, with the positioning pins threadedly connected to the surface of the detection well.

[0009] As a preferred embodiment of the downhole geophone for geophysical exploration according to this utility model, one end of the connecting line is fixedly connected to the surface of the connecting column, and the connecting column and the guide cylinder installed inside the outer shell are slidably connected, and the outer shell and the guide cylinder are fixedly connected. The outer shell has a conical structure. A spring is also sleeved on the surface of the connecting column. One end of the spring is fixedly connected to the surface of the guide cylinder, and the other end of the guide cylinder is fixedly connected to the surface of the geophone.

[0010] As a preferred embodiment of the downhole geophone for geophysical exploration according to this utility model, one end of the connecting column is fixedly connected to the surface of the geophone, the surface of the geophone is rotatably connected to the support, one end of the support is also rotatably connected to the guide wheel, and the end point of the guide wheel is connected to the inner surface of the detection well.

[0011] As a preferred embodiment of the downhole geophone for geophysical exploration according to this utility model, the support surface is further fixedly mounted with the force-bearing rod, and the surfaces of the force-bearing rod and the connecting shaft are slidably connected, and the connecting shaft is fixedly disposed on the inner surface of the outer shell.

[0012] As a preferred embodiment of the downhole geophone for geophysical exploration according to this utility model, the surface of the force-bearing rod is provided with an elliptical groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: through the action of the outer shell, bracket, and guide wheel, the stable transport and retrieval of the detector instrument can be achieved, enabling it to perform detector work stably and keep it always on the central axis of the detection well, which can effectively ensure the accuracy of the collected data. In the event of borehole collapse, the connecting column can be tensioned through the connecting line, and the outer shell can work with the guide cylinder to compress the spring under the action of external resistance, and the support can be retracted by lifting the detector instrument, reducing the resistance during the retrieval process and providing certain convenience for retrieval. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the outer shell and guide cylinder in this utility model;

[0017] Figure 3 This is a schematic diagram of the support structure in the retracted state of this utility model;

[0018] Figure 4 This is a schematic diagram of the support and detector structure in this utility model;

[0019] In the picture:

[0020] 1. Inspection well; 2. Connecting frame; 3. Positioning pin; 4. Connecting line; 5. Connecting column; 6. Housing; 7. Guide cylinder; 8. Detector; 9. Spring; 10. Bracket; 11. Guide wheel; 12. Force rod; 13. Connecting shaft. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1

[0023] like Figure 1As shown:

[0024] A downhole geophone for geophysical exploration includes a detection well 1.

[0025] In this implementation plan: The existing announcement number CN219143108U discloses a downhole detector for geophysical exploration. The technical means of this device will not be described in detail here. For improvements to this prior art, please refer to the following disclosure. To solve the technical problems existing in this prior art, such as the "When the device is used for geophysical exploration, it needs to go deep into the borehole. However, the lack of a stable structure for the device body during detection may cause data errors. At the same time, borehole collapse may occur during detection. The structure of the device is not conducive to the recovery of the device body, which will affect the efficiency and progress of the detection work." In combination, this problem is obviously a real and difficult problem to solve. Therefore, in order to solve the above problems, a connecting column 5 and a support 10 are added.

[0026] Furthermore:

[0027] like Figure 1 - Figure 4 As shown:

[0028] In conjunction with the above, it also includes a connecting frame 2 set on one side of the detection well 1. The connecting frame 2 is connected to a connecting column 5 via a connecting line 4. The connecting column 5 is connected to the inner surface of the outer shell 6. A detector 8 is also installed at one end of the connecting column 5. One side of the detector 8 is connected to one end of the bracket 10. A guide wheel 11 is set at the other end of the bracket 10. A force-bearing rod 12 connected to the connecting shaft 13 is also set on the surface of the bracket 10.

[0029] In this implementation scheme: Under the action of the outer shell 6, the support 10, and the guide wheel 11, the geophone 8 can be stably transported and retrieved, enabling it to perform geophone detection stably and keep it always on the central axis of the detection well 1, which can effectively ensure the accuracy of the collected data. In the event of borehole collapse, the connecting rod 5 can be pulled by the connecting line 4. Under the action of external resistance, the outer shell 6 can cooperate with the guide cylinder 7 to compress the spring 9 and lift the geophone 8 to realize the retrieval of the support 10, reducing the resistance during the retrieval process and providing certain convenience for retrieval.

[0030] Furthermore:

[0031] In an optional embodiment, the connecting frame 2 is mounted on the surface of the inspection well 1, and positioning pins 3 are installed at equal angles on the surface of the connecting frame 2, with the positioning pins 3 threadedly connected to the surface of the inspection well 1.

[0032] In this embodiment, the connecting frame 2 makes the conveying of the connecting line 4 and the outer shell 6 more stable, and also provides auxiliary positioning for the connecting line 4.

[0033] Furthermore:

[0034] In an optional embodiment, one end of the connecting line 4 is fixedly connected to the surface of the connecting post 5, and the connecting post 5 and the guide cylinder 7 installed inside the housing 6 are slidably connected, and the housing 6 and the guide cylinder 7 are fixedly connected. The housing 6 has a conical shape. A spring 9 is also sleeved on the surface of the connecting post 5. One end of the spring 9 is fixedly connected to the surface of the guide cylinder 7, and the other end of the guide cylinder 7 is fixedly connected to the surface of the detector instrument 8.

[0035] In this embodiment, the connection of the connecting line 4 and the connecting post 5 can provide tension for the recycling and conveying of the outer shell 6. At the same time, the interaction between the guide cylinder 7 and the connecting post 5 can ensure that the connecting post 5 and the detector 8 are located on the central axis, which can provide a certain guarantee for data acquisition.

[0036] Furthermore:

[0037] In an optional embodiment, one end of the connecting column 5 is fixedly connected to the surface of the detector 8, the surface of the detector 8 is rotatably connected to the bracket 10, one end of the bracket 10 is also rotatably connected to the guide wheel 11, and the end point of the guide wheel 11 is connected to the inner surface of the detection well 1.

[0038] In this embodiment, the support 10 and guide wheel 11 make the movement of the outer shell 6 more stable, reduce the direct impact or scraping between the main body and the inner wall of the hole, reduce the risk of damage, and enable the detector 8 to perform detection work stably.

[0039] Furthermore:

[0040] In an optional embodiment, a force-bearing rod 12 is also fixedly mounted on the surface of the bracket 10, and the surfaces of the force-bearing rod 12 and the connecting shaft 13 are slidably connected, and the connecting shaft 13 is fixedly disposed on the inner surface of the housing 6.

[0041] In this embodiment: through the action between the bracket 10 and the force rod 12, one end of the force rod 12 can be raised while the detector instrument 8 is raised, thereby generating stress between the force rod 12 and the connecting shaft 13, and further realizing the retraction of the force rod 12.

[0042] Furthermore:

[0043] In an optional embodiment, the surface of the force-bearing rod 12 is provided with an elliptical groove.

[0044] In this embodiment, the groove on the surface of the force-bearing rod 12 enables it to connect with the connecting shaft 13. When the force-bearing rod 12 rotates between the support 10, the force-bearing rod 12 can be pulled to retract, thus preventing jamming during the lifting of the detector instrument 8 and the retraction of the support 10.

[0045] The working principle and usage process of this utility model are as follows: When downhole detection is required, the connecting frame 2 can be connected to the connecting column 5 first. Then, the outer shell 6 can be placed in the detection well 1. The connecting frame 2 can then be mounted on the surface of the detection well 1, and the positioning pin 3 on the surface of the connecting frame 2 can be rotated. The positioning pin 3 will then gradually penetrate into the detection well 1 and be fixed. Then, the external winding device can be controlled to gradually push the outer shell 6 into the detection well 1 through the connecting frame 2. At the same time, the detector 8 will perform detection work. The bracket 10 and guide wheel 11 connected to the outside of the detector 8 will reduce the direct impact or scratch between the main body and the inner wall of the hole, reducing the risk of damage. The outer shell 6 can provide a closed environment for the detector 8, enabling it to work safely. When the detection work is completed, the outer shell 6 and the detector 8 can be returned through the connecting frame 2. In the event of a hole collapse, the operator can control the connecting frame 2 to retract. At this time, the connecting frame 2 will pull the connecting column 5 and the guide cylinder 7 to slide. Simultaneously, the connecting column 5 will drive the detector 8, and together with the guide cylinder 7, it will apply pressure to the spring 9 and compress the spring 9. The detector 8 will gradually rise inside the housing 6. At the same time, the bracket 10 will rotate with the detector 8. The bracket 10 will then drive the force rod 12 to gradually slide with the connecting shaft 13, and the bracket 10 will gradually move from a horizontal state to a vertical state. The bracket 10 and the guide wheel 11 will be in a retracted state. At this time, when retrieving the housing 6 and the detector 8, the friction generated by the bracket 10 can be reduced. At the same time, the conical structure at the top of the housing 6 makes the retrieval work more convenient and effectively improves the efficiency of the retrieval work.

[0046] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A downhole geophysical detector for geophysical exploration, comprising a detection well (1), characterized in that: It also includes a connecting frame (2) set on one side of the detection well (1), the connecting frame (2) is connected to a connecting column (5) by a connecting line (4), the connecting column (5) is connected to the inner surface of the outer shell (6), one end of the connecting column (5) is also equipped with a detector (8), one side of the detector (8) is connected to one end of the bracket (10), the other end of the bracket (10) is provided with a guide wheel (11), and the surface of the bracket (10) is also provided with a force-bearing rod (12) connected to the connecting shaft (13).

2. The downhole geophysical detector for geophysical exploration according to claim 1, characterized in that: The connecting frame (2) is mounted on the surface of the detection well (1), and positioning pins (3) are installed at equal angles on the surface of the connecting frame (2). The positioning pins (3) are threadedly connected to the surface of the detection well (1).

3. The downhole geophysical detector for geophysical exploration according to claim 1, characterized in that: One end of the connecting line (4) is fixedly connected to the surface of the connecting post (5), and the connecting post (5) and the guide cylinder (7) installed inside the outer shell (6) are slidably connected, and the outer shell (6) and the guide cylinder (7) are fixedly connected. The outer shell (6) is conical in shape. A spring (9) is also sleeved on the surface of the connecting post (5). One end of the spring (9) is fixedly connected to the surface of the guide cylinder (7), and the other end of the guide cylinder (7) is fixedly connected to the surface of the detector (8).

4. The downhole geophysical detector for geophysical exploration according to claim 3, characterized in that: One end of the connecting column (5) is fixedly connected to the surface of the detector (8), the surface of the detector (8) is rotatably connected to the bracket (10), one end of the bracket (10) is also rotatably connected to the guide wheel (11), and the end point of the guide wheel (11) is connected to the inner surface of the detection well (1).

5. The downhole geophysical detector for geophysical exploration according to claim 4, characterized in that: The force-bearing rod (12) is also fixedly installed on the surface of the bracket (10), and the surfaces of the force-bearing rod (12) and the connecting shaft (13) are slidably connected, and the connecting shaft (13) is fixedly disposed on the inner surface of the outer shell (6).

6. The downhole geophysical detector for geophysical exploration according to claim 5, characterized in that: The surface of the force-bearing rod (12) is provided with an elliptical groove.

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