Damping device of subsurface instrument circuit board for cable orientation perforation

Abstract

The invention relates to the technical field of downhole instrument circuit board damping, in particular to a damping device of a downhole instrument circuit board for cable orientation perforation, which comprises a fixing support, a circuit board and a damping support, the damping support is arranged at the upper end of the fixing support, the fixing support is connected with the damping support through a fixing screw, and an upper spring and a lower spring are sleeved on the fixing support. A circuit board is arranged at the upper end of the fixing support and connected with the damping support through fixing bolts, and the fixing bolts are sleeved with damping springs. The invention provides a damping device of a circuit board of a downhole instrument for cable orientation perforation, which is supported by a fixing bracket, a damping bracket is mounted on the fixing bracket through a fixing screw, an upper spring and a lower spring are sleeved on the fixing screw, and the circuit board is connected with the damping bracket through a fixing bolt. The fixing bolts are sleeved with damping springs, and the upper ends of the damping springs are positioned through fixing nuts, so that the purposes of improving the stability of the circuit board of the underground instrument and preventing potential damage caused by vibration are achieved.

Description

Technical Field

[0001] This invention relates to the field of vibration reduction technology for downhole instrument circuit boards, and more particularly to a vibration reduction device for a downhole instrument circuit board used for cable orientation perforation. Background Art

[0002] Well completion perforation is a crucial step in the oil and gas well completion process. Its purpose is to create channels in the reservoir, allowing oil and gas to flow into the wellbore and be extracted. With technological advancements, cable-driven directional perforation technology has gradually become the mainstream approach in the perforation field. It not only allows for precise control of perforation location but also enables efficient perforation of multiple reservoir layers. Cable-driven directional perforation technology integrates multiple functions, including depth correction, gyro-based azimuth positioning, automatic control of the perforating gun's orientation, and layered control of perforation cartridges via ground commands. The core of this technology lies in its ability to precisely perforate multiple reservoir layers in a single well operation, improving the accuracy and efficiency of perforation operations. During perforation, the perforator generates a powerful shock wave through an explosion. This shock wave propagates through the well media, connecting sub, and casing wall as the perforator perforates. This allows the perforator to penetrate the reservoir in a specific direction, achieving directional perforation. However, the explosive operation of downhole perforators also brings some problems, especially to the downhole instrument circuit board. As a core component for receiving, analyzing, and converting surface commands, its material and structure are easily affected by the impact and vibration generated by the explosion, leading to damage or component detachment. Such failures not only damage the instrument and increase the cost of repeated construction, but also reduce the reliability of cable-driven directional perforation technology. Summary of the Invention

[0003] (a) Technical problems to be solved This invention provides a vibration damping device for a downhole instrument circuit board used for cable-guided directional perforation, in order to overcome the problem that existing downhole instrument circuit boards for cable-guided directional perforation do not have corresponding vibration damping measures.

[0004] (II) Technical Solution To achieve the above objectives, the present invention provides a shock-absorbing device for a downhole instrument circuit board for cable orientation perforation, comprising: a fixed bracket, a circuit board, and a shock-absorbing bracket; The fixed bracket has a rectangular structure, and a number of fixed threaded holes are evenly provided on the upper end of the fixed bracket; The upper end of the fixed bracket is provided with a shock-absorbing bracket, and the upper end of the shock-absorbing bracket is provided with a circuit board; The upper end of the circuit board is provided with a plurality of circuit board mounting holes, and each of the circuit board mounting holes is provided with a fixing bolt. Each of the plurality of fixed threaded holes is provided with a fixing screw, and the fixing screw is fitted with an upper spring, a shock-absorbing bracket and a lower spring in sequence from top to bottom; The shock absorber bracket has a rectangular structure with a rectangular groove in the center. The upper end of the shock absorber bracket has several bolt holes evenly distributed. The fixing bolt passes through the bolt holes, the circuit board mounting holes and the shock absorber spring from bottom to top and is positioned by the fixing nut. The shock absorber spring is sleeved on the fixing bolt.

[0005] Preferably, the size of the shock-absorbing spring matches the fixing bolt, and the shock-absorbing spring has a preload during installation to fix the circuit board.

[0006] Preferably, the upper spring and the lower spring have different natural frequencies to avoid resonance between them.

[0007] Preferably, the upper and lower springs have a certain preload during installation, and the upper and lower springs fix the shock absorber bracket.

[0008] Preferably, the shock-absorbing bracket is made of polyimide material.

[0009] Preferably, the fixing screw is a semi-threaded screw, with one end of the screw's thread structure embedded in the fixing bracket.

[0010] Preferably, the upper spring, lower spring, and damping spring are used to generate compressive deformation when the fixed bracket is subjected to impact vibration to offset the impact vibration on the damping bracket.

[0011] Preferably, the shock-absorbing bracket is smaller than the fixed bracket and is located at the center of the fixed bracket; the circuit board is smaller than the shock-absorbing bracket and is located at the center of the shock-absorbing bracket.

[0012] (III) Beneficial Effects This invention provides a vibration damping device for a downhole instrument circuit board used for cable azimuth perforation. The device is supported by a fixed bracket and secured by screws in threaded holes at the upper end of the bracket. These screws pass through a vibration damping bracket at the upper end of the bracket. The vibration damping bracket is mounted on the fixed bracket by these screws, and each screw has an upper and lower spring fitted onto it. The upper spring is located at the upper end of the vibration damping bracket, and the lower spring is located at the lower end. The upper and lower springs dampen the vibration. A circuit board is located at the upper end of the vibration damping bracket and connected to it by several fixing bolts. The upper ends of the fixing bolts are positioned by fixing nuts, and a vibration damping spring is positioned between the fixing nuts and the vibration damping bracket, fitted onto the fixing bolts. This improves the stability of the downhole instrument circuit board and prevents potential damage caused by vibration. Attached Figure Description

[0013] Figure 1This is a front view schematic diagram of a shock absorption device for a downhole instrument circuit board for cable orientation perforation according to the present invention; Figure 2 The diagram shows a top view of a shock-absorbing device for a downhole instrument circuit board used for cable orientation perforation according to the present invention.

[0014] Wherein: 1: Fixed bracket; 2: Shock-absorbing bracket; 3: Circuit board; 4: Fixed threaded hole; 5: Fixed screw; 6: Fixed bolt; 7: Fixed nut; 8: Shock-absorbing bracket bolt hole; 9: Upper spring; 10: Lower spring; 11: Shock-absorbing spring. DETAILED DESCRIPTION

[0015] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. The technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] In the description of this invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as "upper," "lower," "left," "right," "inner," "outer," "top," and "bottom" are based on the orientations or positional relationships shown in the accompanying drawings. They are intended only to facilitate the description of this invention and to simplify the description, and are not intended to indicate or imply that the components referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0017] like Figure 1-2 As shown, the present invention provides a shock-absorbing device for a downhole instrument circuit board for cable orientation perforation, comprising: a fixed bracket 1, a circuit board 3, and a shock-absorbing bracket 2. The rectangular structure of the fixed bracket 1 provides a stable support foundation. Several fixed threaded holes 4 are evenly provided at its upper end. The fixing screw 5 is screwed into the fixed threaded holes 4 to achieve a firm installation of the shock absorber bracket 2. The fixing screw 5 is fitted with an upper spring 9 and a lower spring 10, which have a certain preload during installation, so that the device can provide an initial damping effect when subjected to vibration. The natural frequencies of the upper spring 9 and the lower spring are different, which can effectively avoid resonance under vibration at a specific frequency, increasing the stability of the entire device. The fixed bracket 1 and the shock absorber bracket 2 form a system with a dual damping effect, which can more effectively absorb and disperse vibrations from different directions and frequencies, thereby protecting the equipment or structure from damage. The damping ratio of the damping system can be changed by adjusting the preload of the upper spring 9 and the lower spring 10 to adapt to different load conditions and environmental requirements. The threaded structure of the fixing screw 5 is embedded in the fixing bracket 1 at one end, while the other part is a smooth rod-shaped structure without threads. The fixing screw 5 can provide a more robust connection point between the fixing bracket 1 and the shock-absorbing bracket 2, while allowing the shock-absorbing bracket 2 to move along the axial direction of the fixing screw 5 to accommodate the adjustment of the preload between the two springs.

[0018] The fixed bracket 1 serves as the base of the entire vibration damping system, with its upper end directly contacting the vibration damping bracket 2. The vibration damping bracket 2 is made of high heat resistance and high strength polyimide material, which has excellent electrical insulation and mechanical properties, can withstand a wide temperature range, and has a good vibration damping effect. The vibration damping bracket 2 has a rectangular structure, with a rectangular groove in the center, which not only enhances the stability of the structure but also facilitates the positioning and installation of the circuit board 3. The circuit board 3 is placed in the center of the shock absorber bracket 2, which can ensure that the circuit board 3 is uniformly supported and has a shock absorption effect. Several circuit board mounting holes evenly distributed on the circuit board 3 correspond to the bolt holes 8 of the shock absorber bracket, which makes it easy to fix the circuit board 3 tightly to the shock absorber bracket 2 with the fixing bolts 6. The size of the circuit board 3 is smaller than that of the shock absorber bracket 2. This design ensures that the circuit board will not interfere with the edge of the bracket when it is subjected to vibration, while ensuring that the shock absorber bracket 2 can effectively disperse vibration. The fixing bolts 6 pass through the bolt holes 8 of the shock absorber bracket and the mounting holes of the circuit board from bottom to top, and are finally positioned by the fixing nuts 7, thus completing the installation of the circuit board 3. The fixing bolts 6 are fitted with shock absorber springs 11, the size of which matches the fixing bolts 6, to ensure that the shock absorber springs 11 will not slip or misalign during operation. The preload of the shock absorber springs 11 during installation allows the circuit board 3 to be effectively buffered when subjected to vibration, thereby protecting the electronic components on the circuit board from damage. When the fixed bracket 1 is subjected to an upward impact vibration, the upper spring 9 will be compressed, converting some of the energy into its own elastic potential energy, thereby reducing the energy transmitted to the shock-absorbing bracket 2. When the fixed bracket 1 is subjected to a downward impact vibration, the lower spring 10 will be compressed, playing the same shock-absorbing role. The upper spring 9 and the lower spring 10 work together to effectively attenuate vibrations from the vertical direction. The shock-absorbing spring 11 also converts some of the vibration energy into the elastic potential energy of the spring, thereby reducing the impact on the circuit board 3.

[0019] The following is a detailed description of the actual working scenario of a shock absorption device for a downhole instrument circuit board used for cable orientation perforation.

[0020] During actual operation, the downhole perforator generates significant impact vibrations at the moment of perforation, which are transmitted along the perforator's structure to the circuit board 3. When the spring 10 is vibrated, it moves upward, generating an upward force. This force is transmitted to the circuit board 3 through the fixed bracket 1 and the shock-absorbing bracket 2. The upper spring 9 converts some of the impact energy into its own elastic potential energy, thereby reducing the impact on the circuit board 3. Then, the shock-absorbing bracket 2 begins to function. The shock-absorbing bracket 2 absorbs the impact vibration through damping, further reducing the vibration transmitted to the circuit board 3, thus lowering the vibration frequency and amplitude experienced by the circuit board 3. The circuit board 3 moves upward, compressing the shock-absorbing spring 11 to further offset the impact vibration. Under the action of the shock-absorbing spring 11, the circuit board 3 is further protected, avoiding mechanical damage or electrical performance degradation caused by severe vibration.

[0021] It is understood that the various embodiments mentioned above in this invention can be combined with each other to form combined embodiments without violating the principle and logic. Due to space limitations, this invention will not elaborate further.

[0022] Those skilled in the art will understand that, in the above-described method of the specific implementation, the order in which each step is written does not imply a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of each step should be determined by its function and possible internal logic.

[0023] This invention provides a vibration damping device for a downhole instrument circuit board used for cable azimuth perforation. The device is supported by a fixed bracket and secured by screws in several threaded holes at the upper end of the fixed bracket. These screws pass through the vibration damping bracket at the upper end of the fixed bracket. The vibration damping bracket is mounted on the fixed bracket by these screws, and each screw has an upper and lower spring. The upper spring is located at the upper end of the vibration damping bracket, and the lower spring is located at the lower end. The upper and lower springs dampen the vibration. A circuit board is located at the upper end of the vibration damping bracket and connected to it by several fixing bolts. The upper ends of the fixing bolts are positioned by fixing nuts. A vibration damping spring is located between the fixing nut and the vibration damping bracket, and is fitted onto the fixing bolt. This improves the stability of the downhole instrument circuit board and prevents potential damage caused by vibration.

[0024] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A vibration damping device for a downhole instrument circuit board used for cable azimuth perforation, characterized in that, include: Fixed bracket (1), circuit board (3) and shock-absorbing bracket (2); The fixed bracket (1) is a rectangular structure, and a number of fixed threaded holes (4) are evenly provided on the upper end of the fixed bracket (1). The upper end of the fixed bracket (1) is provided with a shock-absorbing bracket (2), and the upper end of the shock-absorbing bracket (2) is provided with a circuit board (3). The upper end of the circuit board (3) is provided with a plurality of circuit board mounting holes, and each of the circuit board mounting holes is provided with a fixing bolt (6). Each of the plurality of fixed threaded holes (4) is provided with a fixing screw (5), and the fixing screw (5) passes through the upper spring (9), the shock absorber bracket (2) and the lower spring (10) from top to bottom. The shock absorber bracket (2) is a rectangular structure with a rectangular groove in the center. The upper end of the shock absorber bracket (2) is evenly provided with several shock absorber bracket bolt holes (8). The fixing bolt (6) passes through the shock absorber bracket bolt holes (8), the circuit board mounting hole and the shock absorber spring (11) from bottom to top and is positioned by the fixing nut (7). The shock absorber spring (11) is sleeved on the fixing bolt (6).

2. The vibration damping device for the downhole instrument circuit board for cable azimuth perforation according to claim 1, characterized in that, The shock-absorbing spring (11) is sized to match the fixing bolt (6), and the shock-absorbing spring (11) has a preload during installation, which fixes the circuit board (3).

3. The vibration damping device for the circuit board of the downhole instrument for cable azimuth perforation according to claim 1, characterized in that, The upper spring (9) and the lower spring (10) have different natural frequencies to avoid resonance between the upper spring (9) and the lower spring (10).

4. The vibration damping device for the downhole instrument circuit board for cable azimuth perforation according to claim 3, characterized in that, The upper spring (9) and the lower spring (10) have a certain preload during installation, and the upper spring (9) and the lower spring (10) fix the shock absorber bracket (2).

5. The vibration damping device for the circuit board of the downhole instrument for cable azimuth perforation according to claim 1, characterized in that, The shock-absorbing bracket (2) is made of polyimide material.

6. The vibration damping device for the circuit board of the downhole instrument for cable azimuth perforation according to claim 1, characterized in that, The fixing screw (5) is a semi-threaded screw, and one end of the thread structure of the fixing screw (5) is embedded in the fixing bracket (1).

7. The vibration damping device for the downhole instrument circuit board for cable azimuth perforation according to claim 1, characterized in that, The upper spring (9), lower spring (10) and shock-absorbing spring (11) are used to generate compression deformation when the fixed bracket (1) is subjected to impact vibration to offset the impact vibration on the shock-absorbing bracket (2).

8. The vibration damping device for the circuit board of the downhole instrument for cable azimuth perforation according to claim 1, characterized in that, The shock-absorbing bracket (2) is smaller than the fixed bracket (1) and is located at the center of the fixed bracket (1). The circuit board (3) is smaller than the shock-absorbing bracket (2) and is located at the center of the shock-absorbing bracket (2).

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