Gamma instrument anti-vibration device

Abstract

The invention provides a gamma instrument anti-vibration device which comprises a gamma instrument body, an upper connector, a connector and a lower connector, the gamma instrument body comprises a shell, magnetic steel, a relay, a circuit module, a photomultiplier and a crystal are arranged in the shell, an out-shell centralizer is arranged on the outer side of the shell, an anti-vibration spring is arranged in the connector, and the anti-vibration spring is arranged in the connector. The side, close to the shell, of the anti-vibration spring abuts against the sealing connecting piece, and the side, close to the lower connector, of the anti-vibration spring abuts against the compression-resistant sealing element. The connector is simple in structure, vibration waves are resisted and absorbed through the anti-vibration springs of the connector, the frequency and the breaking strength of axial vibration waves are reduced, and the centralizer outside the shell is resisted, absorbed and reduced in the frequency and the breaking strength of radial vibration waves; the anti-vibration spring and the out-shell centralizer jointly protect the photomultiplier, the crystal, the relay, the magnetic steel, the circuit module and other core components in the gamma instrument, the gamma instrument is protected to be intact, the gamma instrument can be repeatedly used next time conveniently, and therefore the purpose of reducing the logging perforation cost is achieved.

Description

Technical Field

[0001] The present application relates to the field of petroleum technology, and in particular to a gamma instrument anti-vibration device. Background Art

[0002] In oilfield logging and perforating operations, a gamma instrument is usually first sent downhole with a steel cable hoist. After the gamma instrument is used to measure the depth of the location of the positioning perforation, the gamma instrument is lifted to the ground and taken out. The perforating gun is then lowered into the oil well to the predetermined depth with a steel cable hoist. The ground staff controls the console cable to detonate the shells of the downhole perforating gun to complete the perforating operation. This requires two trips down the well, and each trip and lift will incur high costs.

[0003] In order to improve work efficiency and save costs, the perforating gun and the gamma instrument are now connected and lowered into the well together, the depth of the perforation is measured and the perforation operation is completed at one time, saving the cost of lowering and lifting the gamma instrument into the well. However, a certain vibration will be generated when the shell is perforating, and the gamma instrument is at risk of being damaged by the vibration. Therefore, the gamma instrument needs to be designed to be shockproof.

[0004] After searching, the applicant found the closest prior art as follows:

[0005] The anti-seismic structure of the gamma logging instrument probe with application number CN201520076311.6 discloses a technical solution, including a multiplier tube, one end of the multiplier tube is connected to a crystal, the other end of the crystal is connected to a base by a bolt, a shock-absorbing rubber pad is sandwiched between the base and the crystal, strip screw holes are symmetrically distributed on the base, the strip screw holes are penetrated by the bolts, one end of the bolt is screwed on the crystal, the other end of the bolt is exposed outside the strip screw hole, and the base moves back and forth on the bolt as the shock-absorbing rubber pad expands and contracts; a shock-absorbing rubber pad is arranged between the base and the crystal of the utility model, and the relative position between the base and the crystal changes when the working force is applied, when the shock-absorbing rubber pad is compressed or when the shock-absorbing rubber pad is compressed and then buffered, the base can move back and forth on the bolt as the shock-absorbing rubber pad expands and contracts, effectively solving the damage to the crystal and the photomultiplier tube of the gamma logging instrument due to strong impact and vibration during transportation and well construction.

[0006] This application is mainly used to alleviate vibrations during transportation and well construction. This application can only solve the axial vibration of the gamma logging instrument. The vibration generated by the perforating gun is more complicated. This application cannot alleviate radial vibrations, as well as the frequency and destructive intensity of shock waves.

[0007] In summary, it is necessary to provide a new technical solution to solve the above technical problems. Summary of the invention

[0008] The present application provides a gamma instrument anti-vibration device, comprising a gamma instrument body, wherein two ends of the gamma instrument body are respectively connected with an upper connector and a connector, wherein the connector is connected with a lower connector, wherein the gamma instrument body comprises an outer shell, wherein a magnet, a relay, a circuit module, a photomultiplier tube, and a crystal are arranged inside the outer shell, an outer shell centralizer is arranged outside the outer shell, an anti-vibration spring is arranged inside the connector, a side of the anti-vibration spring close to the outer shell abuts against a sealing connector, a side of the anti-vibration spring close to the lower connector abuts against a pressure-resistant sealing element, the connector is connected with the lower connector via a sealing connector, and an upper connector and the gamma instrument body are connected via a sealing connector.

[0009] As a preferred solution, a cable is provided inside the connector, and a cable spring tube is provided outside the cable.

[0010] As a preferred solution, the connector is a flexible connector.

[0011] As a preferred solution, shock-absorbing pads are provided at both ends of the circuit module, a crystal housing is provided on the outer side of the photomultiplier tube and the crystal, a crystal shock-absorbing pad 1 and a crystal shock-absorbing pad 2 are provided between one end of the photomultiplier tube and the crystal housing, and between one end of the crystal and the crystal housing, respectively, a shock-absorbing tension spring 1 is provided between the crystal shock-absorbing pad 1 and the shock-absorbing pad, and a shock-absorbing tension spring 2 is provided between the crystal shock-absorbing pad 2 and the sealing connector.

[0012] As a preferred solution, a compression plate is arranged on the outer side of the shock absorbing pad, a compression plate 1 is arranged on the outer side of the crystal shock absorbing pad 1, and a shock absorbing tension spring 1 is arranged between the compression plate and the compression plate 1.

[0013] A second compression plate is arranged on the outer side of the second crystal shock-absorbing pad.

[0014] One end of the second shock-absorbing tension spring is connected to the second pressure plate, and the other end of the second shock-absorbing tension spring is connected to the sealing connector.

[0015] The present application has a simple structure and is easy to use. The anti-vibration spring in the connector resists and absorbs shock waves, thereby reducing the frequency and destructive strength of axial shock waves. The outer shell centralizer resists and absorbs and reduces the frequency and destructive strength of radial vibration waves. The anti-vibration spring and the outer shell centralizer work together to protect core components such as photomultiplier tubes, crystals, relays, magnetic steels, circuit modules, etc. in the gamma instrument, and protect the gamma instrument in good condition, so that it is easy to reuse next time, thereby achieving the purpose of reducing the cost of well logging and perforating. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of this application;

[0017] Figure 2 This is a schematic diagram of the structure of the gamma instrument itself;

[0018] Figure 3 It is a schematic diagram of the structure of a flexible connector;

[0019] Reference numerals:

[0020] 1. Gamma instrument body 2. Upper connector 3. Connector 4. Sealing connector

[0021] 5. Single core socket 6. Lower connector 7. Shell 8. Magnetic steel

[0022] 9. Relay 10. Circuit module 11. Photomultiplier tube 12. Crystal

[0023] 13. External stabilizer 14. Anti-vibration spring 15. Pressure-resistant sealing element

[0024] 16. Cable 17. Cable spring tube 18. Shock-absorbing pad 19. Pressure plate

[0025] 20. Crystal housing 21. Crystal shock pad 1 22. Crystal shock pad 2

[0026] 23. Clamping plate 1 24. Clamping plate 2 25. Shock-absorbing tension spring 1

[0027] 26. Shock-absorbing tension spring 2. DETAILED DESCRIPTION

[0028] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be noted that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0029] Embodiment 1:

[0030] The present embodiment provides a gamma instrument anti-vibration device, the outer dimensions of which are preferably: φ80mm×2401.86mm, resistant to external pressure of 100MPa, and resistant to temperature of 150 degrees; comprising a gamma instrument body 1, the gamma instrument body 1 adopts the gamma instrument body 1 in the prior art, the gamma instrument body 1 is powered by a single-core socket 5, the two ends of the gamma instrument body 1 are respectively connected with an upper connector 2 and a connector 3, the upper connector 2 is connected to the gamma instrument body 1 through a sealing connector 4, the connector 3 is connected to the gamma instrument body 1 through a sealing connector 4, the sealing connector 4 is connected to the upper connector 2, the gamma instrument body 1, and the connector 3 through threads and the like, preferably, in order to improve stability, the sealing connector 4 and the gamma instrument body 1 are connected to each other. A top screw anti-retraction buckle is arranged between the outer shell 7, between the sealing connector 4 and the upper connector 2, and between the sealing connector 4 and the connector 3. The upper connector 4 is used to connect the downhole steel cable sling. The connector 3 is connected to the lower connector 6, and the lower connector 6 is connected to the perforating gun through a length of steel cable sling. The gamma instrument body 1 includes an outer shell 7, and a magnetic steel 8, a relay 9, a circuit module 10, a photomultiplier tube 11, and a crystal 12 are arranged in the outer shell 7. The above belongs to the mature prior art of the prior art gamma instrument 1. This application does not make any improvement to the components and the positional relationship between the components, and no further description is made here. The outer side of the outer shell 1 is provided with an outer shell centralizer 13, and the outer shell centralizer 13 resists absorption and reduces the diameter of the perforating shell. The frequency and destructive strength of the axial shock wave, the outer shell centralizer 13 adopts the centralizer in the prior art, and the connection method of the centralizer 13 and the outer shell 1 also belongs to conventional technical means, which will not be described in detail in this application; the connector 13 is provided with an anti-seismic spring 14 inside, and the anti-seismic spring 14 resists and absorbs the shock wave of the perforating shell, reduces the frequency and destructive strength of the axial shock wave, and the anti-seismic spring 14 and the outer shell centralizer 13 together protect the core components such as the photomultiplier tube 11, crystal 12, relay 9, magnet 8, circuit module 10, single-core socket 5 inside the gamma instrument; the side of the anti-seismic spring 14 close to the outer shell 1 abuts against the sealing connector 4, and the side of the anti-seismic spring 14 close to the lower connector 6 abuts against the pressure-resistant sealing element 15 , the pressure-resistant sealing element 15 is sealed and connected to the interior of the connector 3; the anti-vibration spring 14 is arranged inside the connector 3 through the pressure-resistant sealing element 15 and the sealing connector, and the pressure-resistant sealing element 15 is connected to the connector 3 and the lower connecting head 6 by means of threads or the like. In order to improve the stability, a top screw anti-backoff buckle is arranged between the pressure-resistant sealing element 15 and the connector 3, and between the pressure-resistant sealing element 15 and the lower connecting head 6. The connector 3 is used for passing the cable 16. Preferably, a cable spring tube 17 is arranged on the outside of the cable 16. The cable spring tube 17 can be used to protect the safety of the cable 16. More preferably, the connector 3 adopts a flexible connector, which can ensure the freedom of the anti-vibration spring 14 and the cable spring tube 17.

[0031] Embodiment 2:

[0032] This embodiment further reduces the vibration of the gamma instrument body 1 to increase the service life of the gamma instrument. Specifically:

[0033] Shock-absorbing pads 18 are provided at both ends of the circuit module 10. Preferably, the shock-absorbing pads 18 are provided on one side of the circuit module 10 by means of snap-on connection or the like. The shock-absorbing pads 18 can be made of shock-absorbing materials in the prior art, such as rubber, etc. Furthermore, in order to improve the stability of the shock-absorbing pads 18, a compression plate 19 is provided on the outer side of the shock-absorbing pads 18. The compression plate 19 realizes the compression of the shock-absorbing pads 18, and the compression plate 19 is sealed and connected to the inner part of the housing 7; a crystal housing 20 is provided on the outer side of the photomultiplier tube 11 and the crystal 12, and a crystal shock-absorbing pad 1 21 and a crystal shock-absorbing pad 2 22 are respectively provided between one end of the photomultiplier tube 11 and the crystal housing 20 and between one end of the crystal 12 and the crystal housing 20. Similarly, the crystal shock-absorbing pad 1 21 and the crystal shock-absorbing pad 2 22 adopt Shock-absorbing materials in the prior art, such as rubber, etc.; in order to improve the stability of the crystal shock-absorbing pad 21 and the crystal shock-absorbing pad 22, a clamping plate 23 is arranged on the outer side of the crystal shock-absorbing pad 21, and a clamping plate 24 is arranged on the outer side of the crystal shock-absorbing pad 22. The clamping plates 123 and 24 are fixedly connected to the crystal housing 20, and a shock-absorbing tension spring 25 is arranged between the clamping plate 19 and the clamping plate 23, and a shock-absorbing tension spring 26 is arranged between the clamping plate 24 and the pressure sealing element 4; the arrangement of the shock-absorbing pad 18, the crystal shock-absorbing pad 21, the crystal shock-absorbing pad 22, the shock-absorbing tension spring 25 and the shock-absorbing tension spring 26 can reduce the frequency and destructive strength of the shock wave for a second time, thereby ensuring the safety of the core components of the gamma instrument, such as the photomultiplier tube 11 and the crystal 12.

[0034] In the present application, the upper connector 2 is connected to the downhole steel cable sling, and the lower connector 6 is connected to the perforating gun through a length of steel cable sling, thereby completing the downhole measurement and positioning depth and the perforating gun shell perforating operation at one time. The measurement signal of the downhole gamma measuring instrument is transmitted to the ground control console by the cable. After the ground operator determines the depth, the shell of the perforating gun is detonated to complete the lateral perforation. When the vibration wave of the perforating shell is transmitted to the present application, the anti-vibration spring 14 of the connector 3 resists and absorbs the vibration wave, reduces the frequency and destructive strength of the axial vibration wave, and the outer shell centralizer 13 resists and absorbs the radial vibration wave. The frequency and destructive strength; the anti-vibration spring 14 and the outer shell centralizer 13 play a role together , protecting the core components of the gamma instrument such as the photomultiplier tube 11, crystal 12, relay 9, magnet 8, circuit module 10, etc.; the crystal shock-absorbing pad 21, shock-absorbing tension spring 25, crystal shock-absorbing pad 22, and shock-absorbing tension spring 26 can reduce the frequency and destructive strength of the shock wave for a second time, thereby ensuring the safety of the core components inside the gamma instrument body; further, the cable spring tube 17 can protect the safety of the cable 16, and the flexible connector can ensure the freedom of the anti-vibration spring 14 and the cable spring tube 17; after the perforation is completed, the gamma measuring instrument is lifted to the ground, and due to the protective effect of the anti-vibration device, the gamma measuring instrument is intact and convenient for reuse next time, thereby achieving the purpose of reducing the cost of well logging perforation.

[0035] The present application has a simple structure and is easy to use. The anti-vibration spring in the connector resists and absorbs shock waves, thereby reducing the frequency and destructive strength of axial shock waves. The outer shell centralizer resists and absorbs and reduces the frequency and destructive strength of radial vibration waves. The anti-vibration spring and the outer shell centralizer work together to protect core components such as photomultiplier tubes, crystals, relays, magnetic steels, circuit modules, etc. in the gamma instrument, and protect the gamma instrument in good condition, so that it is easy to reuse next time, thereby achieving the purpose of reducing the cost of well logging and perforating.

[0036] The preferred embodiments of the present application are described in detail above in conjunction with the accompanying drawings; however, the present application is not limited to the specific details in the above embodiments. Within the technical concept of the present application, a variety of simple modifications can be made to the technical solution of the present application, and these simple modifications all fall within the protection scope of the present application.

[0037] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the various possible combinations of this application will not be described separately.

[0038] In addition, the various implementation modes of the present application may be arbitrarily combined, and as long as they do not violate the concept of the present application, they should also be regarded as the contents disclosed in the present application.

Claims

1. A gamma instrument antivibration device, comprising a gamma instrument body (1), characterized in that: The two ends of a gamma instrument body (1) are respectively connected to an upper connector (2) and a connector (3), the connector (3) being connected to a lower connector (6), the gamma instrument body (1) comprising a housing (7), a magnetic steel (8), a relay (9), a circuit module (10), a photomultiplier tube (11), and a crystal (12) being arranged inside the housing (7), an outer shell stabilizer (13) being arranged outside the housing (7), an anti-vibration spring (14) being arranged inside the connector (3), a side of the anti-vibration spring (14) close to the housing (7) being in contact with a sealing connector (4), a side of the anti-vibration spring (14) close to the lower connector (6) being in contact with a pressure-resistant sealing element (15), the connector (3) being connected to the lower connector (6) via the sealing connector (4), and the gamma instrument body (1) being connected to the upper connector (2) via the sealing connector (4).

2. A gamma instrument anti-vibration device according to claim 1, characterized in that: A cable (16) is inserted into the connector (3), and a cable spring tube (17) is arranged on the outside of the cable (16).

3. A gamma instrument anti-vibration device according to claim 1 or 2, characterized in that: The connector (3) is a flexible connector.

4. The gamma instrument anti-vibration device according to claim 1, characterized in that: Shock-absorbing pads (18) are arranged at both ends of the circuit module (10); a crystal housing (20) is arranged on the outer sides of the photomultiplier tube (11) and the crystal (12); a crystal shock-absorbing pad 1 (21) and a crystal shock-absorbing pad 2 (22) are arranged between one end of the photomultiplier tube (11) and the crystal housing (20), and between one end of the crystal (12) and the crystal housing (20), respectively; a shock-absorbing tension spring 1 (25) is arranged between the crystal shock-absorbing pad 1 (21) and the shock-absorbing pad (18); and a shock-absorbing tension spring 2 (26) is arranged between the crystal shock-absorbing pad 2 (22) and the sealing connector (4).

5. A gamma instrument anti-vibration device according to claim 4, characterized in that: A pressure plate (19) is arranged on the outer side of the shock-absorbing pad (18), a pressure plate (23) is arranged on the outer side of the crystal shock-absorbing pad (21), and a shock-absorbing tension spring (25) is arranged between the pressure plate (19) and the pressure plate (23).

6. A gamma instrument anti-vibration device according to claim 5, characterized in that: A second compression plate (24) is arranged on the outer side of the second crystal shock-absorbing pad (22).

7. A gamma instrument anti-vibration device according to claim 6, characterized in that: One end of the second shock-absorbing tension spring (26) is connected to the second pressure plate (24), and the other end of the second shock-absorbing tension spring (26) is connected to the sealing connector (4).

Images