Radioactive logging instrument probe vibration reduction structure

Abstract

The utility model relates to the technical field of logging instruments, and discloses a radioactive logging instrument probe vibration reduction structure which comprises a protective shell, two installation vertical plates are arranged in the protective shell, a first supporting plate is arranged between the two installation vertical plates, a second supporting plate is arranged on the lower side of the first supporting plate, and the second supporting plate is arranged on the lower side of the second supporting plate. Circular grooves extending out of the lower surface are formed in vertical plates on the two sides of the protective shell, ejector rods are slidably connected into the circular grooves, first damping springs are fixedly connected between the upper ends of the ejector rods and the top walls of the circular grooves, and through cooperation of the ejector rods, fixing plates, the first damping springs, sliding blocks, second supporting plates and other structures, the damping effect is improved. The detection probe can be rapidly retracted into the protective shell when the protective shell collides with the well bottom, so that the probe is protected, the situation that the probe is damaged is effectively avoided, and the safety and the practicability are high.

Description

Technical Field

[0001] This utility model relates to the field of logging instrument technology, specifically to a vibration reduction structure for a radioactive logging instrument probe. Background Technology

[0002] A well logging tool is used in well drilling. It can continuously scan the wellbore and perform lateral scanning at any level, providing technical data such as the vertical profile, horizontal cross-section, effective cross-section, and deviation distance of the wellbore. Logging results can be displayed directly on a computer screen or generated by a plotter or printer, offering flexibility and convenience.

[0003] In the prior art, CN215979356U discloses a pulsed neutron activated flow logging tool. However, in actual use, the logging tool is usually lowered into the well using a rope. If the lowering speed is not properly controlled, the excessive speed will cause the probe to have a large momentum when it reaches the bottom of the well, making it difficult to stop in a short time, which may lead to a collision with the bottom of the well. Alternatively, in actual operation, the operator may misjudge the position of the probe, resulting in an accidental collision between the probe and the bottom of the well, which may easily damage the probe and cause poor safety. In view of this, we propose a vibration reduction structure for a radioactive logging tool probe to solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a vibration reduction structure for a radioactive logging tool probe, thereby solving the problem of poor protection performance of some existing radioactive logging tool probes.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a vibration damping structure for a radioactive logging tool probe, comprising a protective shell, two mounting vertical plates inside the protective shell, a first support plate between the two mounting vertical plates, a second support plate below the first support plate, circular grooves extending from the lower surface of each of the two vertical plates of the protective shell, a top rod slidably connected inside the circular groove, a first damping spring fixedly connected between the upper end of the top rod and the top wall of the circular groove, a first through groove on the inner wall of the circular groove, a fixing rod fixedly connected between the two top rods on the front and rear sides, the fixing rod slidably connected inside the first through groove, two second through grooves inside each of the two mounting vertical plates, the fixing rod slidably connected inside the second through groove, two sliding blocks fixedly connected to each of the two surfaces of the second support plate, four sliding blocks slidably connected inside the four second through grooves, guide grooves on the adjacent surfaces of the mounting vertical plates, and buffer components inside the guide grooves.

[0006] Preferably, a rubber pad is fixedly connected to the lower end of the top rod.

[0007] Preferably, the buffer assembly includes a guide rod, which is fixedly connected inside the guide groove. Guide blocks are fixedly connected to both sides of the first support plate. The two guide blocks are slidably connected inside the two guide grooves and slidably sleeved on the outside of the two guide rods.

[0008] Preferably, a second damping spring is fixedly connected between the inner walls of the two guide blocks and the guide groove, and the second damping spring is movably sleeved on the outside of the guide rod.

[0009] Preferably, a vibration damping component is provided between the first support plate and the second support plate.

[0010] Preferably, the inner walls on both sides of the protective shell are provided with vertical grooves, and two connecting plates are slidably connected inside the vertical grooves. A first inclined plate is rotatably connected between the upper connecting plate and the surface of the mounting vertical plate, and a second inclined plate is rotatably connected between the lower connecting plate and the mounting vertical plate. A clearance groove is provided inside the first inclined plate, and the second inclined plate is located inside the clearance groove.

[0011] Preferably, dampers are fixedly connected to the top and bottom walls of the vertical groove, and the two dampers are fixedly connected to the two connecting plates respectively. A third damping spring is fixedly connected between the upper connecting plate and the top wall of the vertical groove and between the lower connecting plate and the bottom wall of the vertical groove. The third damping spring is movably sleeved on the outside of the damper.

[0012] Preferably, a third damping spring is also fixedly connected between the two connecting plates.

[0013] Compared with the prior art, this utility model provides a vibration reduction structure for a radioactive logging tool probe, which has the following beneficial effects:

[0014] 1. The vibration reduction structure of the radioactive logging tool probe, through the cooperation of the top rod, fixing plate, first vibration damping spring, sliding block, and second support plate, enables the detection probe to quickly retract into the protective shell when it collides with the bottom of the well, thus forming protection for the probe and effectively avoiding probe damage. It has high safety and high practicality.

[0015] 2. The vibration reduction structure of the radioactive logging tool probe, through the cooperation of connecting plates, first inclined plates, second inclined plates, dampers and third vibration reduction springs, achieves lateral vibration reduction. Thus, when the protective shell collides with the well wall, it can effectively reduce vibration, making the vibration reduction more comprehensive and the protection effect better. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the vibration reduction structure of a radioactive logging tool probe according to the present invention;

[0017] Figure 2 This is a cross-sectional view of the circular groove of this utility model;

[0018] Figure 3 This is a cross-sectional view of the second through groove of this utility model;

[0019] Figure 4 This is a cross-sectional view of the guide groove of this utility model;

[0020] Figure 5 This is a cross-sectional view of the vertical groove of this utility model.

[0021] In the diagram: 1. Protective shell; 2. Mounting vertical plate; 3. First support plate; 4. Second support plate; 5. Circular groove; 6. Top rod; 7. First damping spring; 8. Fixing rod; 9. Second through groove; 10. Sliding block; 11. Rubber pad; 12. First through groove; 13. Guide groove; 14. Guide rod; 15. Guide block; 16. Second damping spring; 17. Damping assembly; 18. Vertical groove; 19. Connecting plate; 20. First inclined plate; 21. Second inclined plate; 22. Clearance through groove; 23. Damper; 24. Third damping spring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0023] Please see Figures 1-5This utility model provides a technical solution: a vibration reduction structure for a radioactive logging tool probe, including a protective shell 1. The protective shell 1 has two mounting vertical plates 2 inside, and a first support plate 3 is positioned between the two mounting vertical plates 2. A second support plate 4 is positioned below the first support plate 3, and the second support plate 4 is used to mount the detection probe. Both sides of the protective shell 1 have circular grooves 5 extending outwards from their lower surfaces. A push rod 6 is slidably connected inside the circular groove 5. A first damping spring 7 is fixedly connected between the upper end of the push rod 6 and the top wall of the circular groove 5. Through the cooperation of the push rod 6 and the first damping spring 7, the vibration reduction structure between the push rod 6 and the bottom of the well is achieved. Upon contact, it can provide a certain buffering effect. The inner wall of the circular groove 5 is provided with a first through groove 12. The two top rods 6 on the front and rear sides are fixedly connected with a fixing rod 8. The fixing rod 8 is slidably connected inside the first through groove 12. The interior of each of the two mounting vertical plates 2 is provided with two second through grooves 9. The fixing rod 8 is slidably connected inside the second through grooves 9. The two sides of the second support plate 4 are fixedly connected with two sliding blocks 10. The four sliding blocks 10 are slidably connected inside the four second through grooves 9 respectively. The adjacent side surfaces of the two mounting vertical plates 2 are provided with guide grooves 13. The interior of the guide grooves 13 is provided with buffer components.

[0024] The probe installed on the lower side of the second support plate 4 is the same as that in the prior art with announcement number CN215979356U, so it will not be described in detail below.

[0025] A rubber pad 11 is fixedly connected to the lower end of the top rod 6. The rubber pad 11 can play a certain buffering role when the top rod 6 contacts the bottom of the well, thereby extending the service life of the top rod 6.

[0026] In the above embodiments, the top rod 6 and the fixing rod 8 can be made of polyethylene to avoid affecting the accuracy of the probe's detection data.

[0027] The buffer assembly includes a guide rod 14, which is fixedly connected inside the guide groove 13. Guide blocks 15 are fixedly connected to both sides of the first support plate 3. The two guide blocks 15 are slidably connected inside the two guide grooves 13 respectively, and the two guide blocks 15 are slidably sleeved on the outside of the two guide rods 14 respectively.

[0028] A second damping spring 16 is fixedly connected between the inner walls of the two guide blocks 15 and the guide groove 13. The second damping spring 16 is movably sleeved on the outside of the guide rod 14.

[0029] A vibration damping component 17 is provided between the first support plate 3 and the second support plate 4. The vibration damping component 17 is an existing structure. For details, please refer to the prior art with announcement number CN215979356U. Therefore, it will not be described in detail in this article.

[0030] Vertical grooves 18 are provided on both inner walls of the protective shell 1. The internal structure of the two vertical grooves 18 is the same. Therefore, the following description focuses on the internal structure of the left vertical groove 18. Two connecting plates 19 are slidably connected inside the vertical groove 18. A first inclined plate 20 is rotatably connected between the upper connecting plate 19 and the surface of the mounting vertical plate 2. A second inclined plate 21 is rotatably connected between the lower connecting plate 19 and the mounting vertical plate 2. A clearance groove 22 is provided inside the first inclined plate 20. The second inclined plate 21 is located inside the clearance groove 22. When the mounting vertical plate 2 moves, the second inclined plate 21 will move inside the clearance groove 22.

[0031] Dampers 23 are fixedly connected to the top and bottom walls of the vertical groove 18. The two dampers 23 are fixedly connected to the two connecting plates 19 respectively. A third damping spring 24 is fixedly connected between the upper connecting plate 19 and the top wall of the vertical groove 18 and between the lower connecting plate 19 and the bottom wall of the vertical groove 18. The third damping spring 24 is movably sleeved on the outside of the damper 23. With the cooperation of the damper 23 and the third damping spring 24, the transverse vibration of the probe is reduced.

[0032] A third damping spring 24 is also fixedly connected between the two connecting plates 19.

[0033] Working principle:

[0034] In use, the vibration damping structure of this radioactive logging tool probe involves the operator installing the probe on the lower surface of the second support plate 4, then connecting the protective shell 1 to the external rope. The protective shell 1 is then lowered into the well using an external cable-laying mechanism. When the protective shell 1 accidentally contacts the bottom of the well, the push rod 6 will first contact the bottom and slide inside the circular groove 5. At this time, the first damping spring 7 will extend and retract inside the circular groove 5. The elastic deformation of the first damping spring 7 converts the vibration force into elastic potential energy, achieving a buffering effect. During the movement of the push rod 6, the fixed rod 8 will slide inside the first through groove 12 and the second through groove 9. When the fixed rod 8 contacts the sliding block 10, it will lift the sliding block 10 upwards. At this time, both the second support plate 4 and the first support plate 3 will move upwards, thereby moving the probe into the protective shell 1. Ultimately, in the event of an accidental collision between the protective shell 1 and the bottom of the well, the probe can be retracted into the protective shell 1, thus protecting the probe.

[0035] When the protective shell 1 comes into contact with the well wall during descent, causing it to shake, the second damping spring 16 and the damping assembly 17 can be used to dampen the vertical vibration of the detection probe. When lateral shaking occurs, the mounting plate 2 will move. At this time, the cooperation between the first inclined plate 20, the second inclined plate 21, the damper 23 and the third damping spring 24 can be used to dampen the probe laterally, making the vibration reduction more comprehensive.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vibration damping structure for a radioactive logging tool probe, comprising a protective shell (1), characterized in that: The protective shell (1) has two mounting vertical plates (2) inside, and a first support plate (3) is provided between the two mounting vertical plates (2). A second support plate (4) is provided on the lower side of the first support plate (3). The two vertical plates on both sides of the protective shell (1) are provided with circular grooves (5) extending out of the lower surface. A top rod (6) is slidably connected inside the circular groove (5). A first damping spring (7) is fixedly connected between the upper end of the top rod (6) and the top wall of the circular groove (5). A first through groove (12) is provided on the inner wall of the circular groove (5). The two top rods (6) on the front and rear sides are connected to each other. A fixed rod (8) is fixedly connected between the two mounting vertical plates (2). The fixed rod (8) is slidably connected inside the first through groove (12). Two second through grooves (9) are opened inside each of the two mounting vertical plates (2). The fixed rod (8) is slidably connected inside the second through grooves (9). Two sliding blocks (10) are fixedly connected to both sides of the second support plate (4). The four sliding blocks (10) are slidably connected inside the four second through grooves (9). Guide grooves (13) are opened on the adjacent side surfaces of the mounting vertical plates (2). Buffer components are provided inside the guide grooves (13).

2. The vibration reduction structure for a radioactive logging tool probe according to claim 1, characterized in that: A rubber pad (11) is fixedly connected to the lower end of the top rod (6).

3. The vibration reduction structure for a radioactive logging tool probe according to claim 1, characterized in that: The buffer assembly includes a guide rod (14), which is fixedly connected inside the guide groove (13). Guide blocks (15) are fixedly connected to both sides of the first support plate (3). The two guide blocks (15) are slidably connected inside the two guide grooves (13) respectively, and the two guide blocks (15) are slidably sleeved on the outside of the two guide rods (14).

4. The vibration reduction structure for a radioactive logging tool probe according to claim 3, characterized in that: A second damping spring (16) is fixedly connected between the inner walls of the two guide blocks (15) and the guide groove (13), and the second damping spring (16) is movably sleeved on the outside of the guide rod (14).

5. The vibration reduction structure for a radioactive logging tool probe according to claim 1, characterized in that: A vibration damping component (17) is provided between the first support plate (3) and the second support plate (4).

6. The vibration reduction structure for a radioactive logging tool probe according to claim 1, characterized in that: The protective shell (1) has vertical grooves (18) on both inner walls. Two connecting plates (19) are slidably connected inside the vertical grooves (18). A first inclined plate (20) is rotatably connected between the upper connecting plate (19) and the surface of the mounting vertical plate (2). A second inclined plate (21) is rotatably connected between the lower connecting plate (19) and the mounting vertical plate (2). A clearance groove (22) is provided inside the first inclined plate (20), and the second inclined plate (21) is located inside the clearance groove (22).

7. The vibration reduction structure for a radioactive logging tool probe according to claim 6, characterized in that: The top and bottom walls of the vertical groove (18) are fixedly connected to dampers (23), and the two dampers (23) are fixedly connected to the two connecting plates (19) respectively. The upper connecting plate (19) and the top wall of the vertical groove (18) are fixedly connected to the lower connecting plate (19) and the bottom wall of the vertical groove (18), and the third damping spring (24) is movably sleeved on the outside of the damper (23).

8. The vibration reduction structure for a radioactive logging tool probe according to claim 7, characterized in that: A third damping spring (24) is also fixedly connected between the two connecting plates (19).

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