A shock sub for a drilling instrument and a method of installation and a measurement while drilling instrument

Abstract

The present application relates to the technical field of vibration reduction of measurement while drilling instrument, and specifically discloses a vibration damper for measurement while drilling instrument, a mounting method and a measurement while drilling instrument, which comprises a fixing module for mounting electronic components, an end connecting module arranged at the axial two ends of the fixing module, and the end connecting module comprises a sliding buffer, a positioning member, an inner expanding member, a flexible buffer and a clamping member, wherein the positioning member comprises a positioning cylinder, one end of the positioning cylinder is provided with a connecting cylinder connected with the fixing module, the sliding buffer comprises a sliding sleeve, the opening end of the sliding sleeve extends outward along the radial direction to form a pressing plate, the sliding sleeve is slidingly arranged on the outer wall of the positioning cylinder, the flexible buffer is sleeved on the top of the connecting cylinder, the clamping member comprises a clamping plate and an adjusting plate, the clamping plate and the adjusting plate are connected through a first spring, and the inner expanding member enables the adjusting plate to move radially. The present application can not only realize the vibration reduction of the electronic components in the beryllium copper pipe, but also can be applied to the installation in the pipes with different lengths.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of shock absorber for measurement while drilling instrument, and particularly relates to a shock absorber for measurement while drilling instrument, a mounting method and a measurement while drilling instrument. BACKGROUND

[0002] The MWD measurement while drilling instrument is connected by beryllium copper pipes, and electronic components in the MWD measurement while drilling instrument are independently installed in a beryllium copper pipe, for example, a pulse module, a signal receiving end, a gamma module, a battery module and a directional module are respectively installed in a beryllium copper pipe, and the beryllium copper pipes are electrically connected through signal lines and connectors. The beryllium copper pipe includes a pipe in the middle and female connectors and male connectors at both ends, a centralizer is arranged between the pipe and the female connector, and adjacent two beryllium copper pipes are connected through the female connector and the male connector; during use, the MWD measurement while drilling instrument is installed in a non-magnetic drill pipe, and each beryllium copper pipe needs to be separately installed with a shock absorbing module to reduce the influence of downhole vibration on the electronic components in the MWD measurement while drilling instrument, thereby reducing the measurement accuracy.

[0003] In the prior art, the shock absorbing module for the MWD measurement while drilling instrument, such as CN105275452B-a shock absorbing device with the function of protecting the measurement while drilling instrument, mainly includes a shell for installing electronic components and rubber shock absorbing structures arranged at both ends of the shell, and then the shock absorbing module loaded with the electronic components is placed in the pipe, and then the both ends of the pipe are fixed with the shock absorbing module through the detachable female connector (lower connector) and male connector (upper connector).

[0004] The existing shock absorbing module is fixed based on that the inner diameter of the connector at both ends of the pipe is smaller than the end size of the shock absorbing module, so that the axial both ends of the shock absorbing module are limited, and since the shock absorbing module is fixed by limiting the axial both ends, the shock absorbing module can only be installed in a pipe with a specific length, and cannot be used when the length of the pipe changes, so the universality is not strong. SUMMARY

[0005] The present application aims to provide a shock absorber for measurement while drilling instrument, which can not only realize shock absorption of electronic components in a beryllium copper pipe, but also is not dependent on limiting the axial both ends for fixing, and can be installed in pipes with different lengths.

[0006] In addition, the present application also provides a mounting method of the shock absorber and a measurement while drilling instrument containing the shock absorber.

[0007] The present application is realized by the following technical solutions:

[0008] A shock absorber for measurement while drilling instrument, comprising:

[0009] The mounting module is used to install electronic components and has a vibration damping function.

[0010] The end connection module is located at both axial ends of the fixed module and is used to install the vibration damper inside the beryllium copper tube; the end connection module includes a sliding buffer, a positioning component, an internal expansion component, a flexible buffer, and a clamping component;

[0011] The positioning component includes a positioning cylinder, and a connecting cylinder is provided at one end of the positioning cylinder. The outer diameter of the connecting cylinder is larger than the outer diameter of the positioning cylinder.

[0012] The sliding buffer includes a sliding sleeve, one end of which is closed and the other end is open. The open end of the sliding sleeve extends radially outward to form a pressure plate. The sliding sleeve is slidably disposed on the outer wall of the positioning cylinder.

[0013] A flexible buffer element is fitted on top of the connecting cylinder, and it deforms under the pressure of the pressure plate and the connecting cylinder;

[0014] The clamping component includes a clamping plate and an adjusting plate, which are connected by a first spring. The clamping plate is slidably disposed on the side wall of the connecting cylinder.

[0015] One end of the inner expansion member is connected to the closed end of the sliding sleeve. The inner expansion member causes the adjusting plate to move radially until it stably abuts against the inner wall of the beryllium copper tube.

[0016] When the plate moves to contact the inner wall of the beryllium copper tube, the first spring is compressed, and the flexible buffer deforms and contacts the inner wall of the beryllium copper tube.

[0017] The sliding buffer of this invention achieves its own axial displacement, thereby enabling the flexible buffer to deform under the pressure of the pressure plate and the connecting cylinder. When the flexible buffer is deformed by compression, it abuts against the inner wall of the beryllium copper tube. When the beryllium copper tube is vibrated, radial vibration reduction can be achieved through the flexible buffer. After the vibration is transmitted to the flexible buffer radially, since the flexible buffer is positioned between the sliding buffer and the positioning member in the axial direction, the vibration received by the flexible buffer is transmitted to the sliding buffer and the positioning member in two directions. The positioning member then transmits the vibration to the fixed module through the clamping member. After multi-stage vibration reduction, the electronic components in the fixed module can be effectively vibration reduced.

[0018] On the other hand, the sliding buffer of the present invention drives the inner expansion member to move axially. The axial displacement of the inner expansion member realizes the radial movement of the clamping member. When the clamping plate moves to abut against the inner wall of the beryllium copper tube, when the first spring is in a compressed state, an axial force is applied to both the clamping plate and the adjusting plate. Under the action of the restoring force of the first spring, the clamping member is fixed to the inner wall of the beryllium copper tube. At the same time, the restoring force of the first spring can improve the connection stability between the adjusting plate and the inner expansion member. In addition, the first spring can also dilute some vibration, thus achieving the purpose of vibration reduction. That is, the end connection module of the present invention does not rely on the axial forces at both ends to fix the vibration damper inside the beryllium copper tube, but uses the radial force applied by the clamping member to fix the vibration damper inside the beryllium copper tube. In this way, the vibration damper can be fixed at any position inside the beryllium copper tube, which is applicable to beryllium copper tubes of different lengths.

[0019] In a preferred embodiment, the outer section of the radial end face of the connecting cylinder forms a second inclined surface, and the flexible buffer is fitted onto the second inclined surface; the outer section of the radial end face of the pressure plate opposite to the connecting cylinder forms a first inclined surface, and the flexible buffer is deformed by the compression of the first and second inclined surfaces and comes into contact with the inner wall of the beryllium copper tube.

[0020] The sloping structure makes it easier to install flexible buffer components.

[0021] In a preferred embodiment, the first inclined plane and the second inclined plane are arranged in a mirror image, and the distance between the first inclined plane and the second inclined plane gradually increases from one end of the positioning cylinder to one end of the beryllium copper tube.

[0022] When the flexible buffer is subjected to axial compression, it extends radially. The first and second inclined surfaces of the above structure are compressed, resulting in different spaces at the two ends of the flexible buffer in the radial direction. The space on the side closer to the beryllium copper tube is larger. Therefore, when the flexible buffer is subjected to axial compression, it can better achieve contact with the inner wall of the beryllium copper tube.

[0023] In a preferred embodiment, the inner expansion member includes a vertical rod, one end of which is connected to the closed end of the sliding sleeve and disposed inside the positioning member, and a first wedge block is disposed on the outer wall of the vertical rod; a second wedge block that cooperates with the first wedge block is disposed on the adjusting plate.

[0024] The present invention preferably utilizes the inclined surface of the wedge block to convert the axial displacement of the vertical rod into the radial displacement of the adjusting plate and the clamping plate.

[0025] In a preferred embodiment, a limiting element is provided on the outer wall of the vertical rod above the first wedge block; the limiting element abuts or engages with the inner wall of the positioning cylinder.

[0026] The aforementioned limiting components can improve the stability of the vertical rod placed inside the positioning cylinder, and make the overall integrity of the sliding buffer, positioning components, internal expansion components and clamping components better after connection.

[0027] In a preferred embodiment, the limiting element is a wedge-shaped positioning block or a positioning block with an arc-shaped end, or the limiting element is an elastic positioning block, and a limiting groove that cooperates with the elastic positioning block is provided on the inner wall of the positioning cylinder; when the sliding buffer moves to make the card plate abut against the inner wall of the beryllium copper tube, the elastic positioning block moves into the limiting groove.

[0028] In a preferred embodiment, the elastic positioning block includes a first fixing block and a second fixing block, which are connected by a third spring. The first fixing block is connected to the outer wall of the vertical rod. When the elastic positioning block is not moved into the limiting groove, the third spring is in a compressed state.

[0029] In a preferred embodiment, a baffle is provided at the end of the card plate away from the fixing module, and a second spring is provided between the baffle and the inner wall of the connecting cylinder.

[0030] The above structure allows the card plate to be reset using the restoring force of the second spring.

[0031] In a preferred embodiment, the flexible buffer is shaped as a complete ring or a ring with notches at its edges.

[0032] In a preferred embodiment, an annular damping element is provided on the outer wall of the sliding sleeve above the pressure plate, and a buffer column is provided between the annular damping element and the pressure plate;

[0033] The outer wall of the annular damper contacts the inner wall of the beryllium copper tube, and there are gaps between the buffer column and the inner wall of the beryllium copper tube and the outer wall of the sliding sleeve.

[0034] This invention, by setting up an annular damping component and a buffer column, can better achieve the vibration reduction effect of the damper. The annular damping component, the flexible buffer component, and the clamping component work together to share the radial vibration of the beryllium copper tube, and the connection of the buffer column and the positioning component achieves multi-stage axial vibration reduction, thereby improving the vibration reduction effect.

[0035] In a preferred embodiment, a buffer cavity is formed within the annular damper. The buffer cavity enhances the damping effect of the annular damper, allowing vibrations transmitted to it to be attenuated through the cavity.

[0036] A method for installing a vibration damper includes the following steps:

[0037] S1. Install the electronic components into the fixed module;

[0038] S2. Connect the two ends of the fixed module to the two connecting cylinders respectively to form a vibration damper;

[0039] S3. Place the vibration damper inside the beryllium copper tube. First, hold one end of the vibration damper in place with a fixing component. Then, apply an axial thrust to the sliding buffer at the other end of the vibration damper until the inner expansion component causes the clamping plate to abut against the inner wall of the beryllium copper tube. At this point, the flexible buffer deforms and abuts against the inner wall of the beryllium copper tube. Repeat the same operation on one end of the vibration damper until both ends of the vibration damper are fixed to the inner wall of the beryllium copper tube.

[0040] A drilling measurement instrument including the above-mentioned vibration damper is composed of several sections of beryllium copper tubes connected in sequence, and electronic components are installed inside the beryllium copper tubes through the vibration damper.

[0041] In a preferred embodiment, the axial ends of the beryllium copper tube are provided with mating male and female connectors.

[0042] The male connector includes a threaded connection section for connecting with the female connector. The axial ends of the threaded connection section are respectively provided with a first equal diameter section and a second equal diameter section. The outer walls of the first equal diameter section and the second equal diameter section are respectively provided with a first sealing ring and a second sealing ring.

[0043] The first and second sealing rings not only facilitate the sealing of the measurement-while-drilling instrument, but also reduce vibration at the connection between two adjacent beryllium copper tubes.

[0044] In a preferred embodiment, both the male and female connectors are provided with damping blocks; both the male and female connectors are provided with telescopic rods for applying axial thrust to the sliding buffer.

[0045] The above-described measurement-while-drilling instrument can apply axial thrust to the sliding buffer of the vibration damper through the telescopic rod, without the need for additional external force. At the same time, the vibration damping block also has a vibration damping effect. Furthermore, the vibration damping block is connected to the vibration damper inside the beryllium copper tube through the telescopic rod, together forming axial vibration damping, which helps to improve the vibration damping effect of the measurement-while-drilling instrument.

[0046] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0047] 1. The end connection module of the present invention does not rely on the axial force at both ends to fix the vibration damper inside the beryllium copper tube. Instead, it uses the radial force applied by the clamping member to fix the vibration damper inside the beryllium copper tube. In this way, the vibration damper can be fixed at any position inside the beryllium copper tube, which is applicable to beryllium copper tubes of different lengths. Furthermore, the combination of sliding buffer, inner expansion member, flexible buffer and clamping member realizes both radial and axial vibration reduction. Combined with the fixing module with vibration reduction function, it can effectively reduce the vibration of electronic components inside the fixing module.

[0048] 2. The measurement while drilling instrument of the present invention uses the above-mentioned vibration damper, which can be applied to the connection of beryllium copper tubes of different lengths. A sealing ring is provided at the connection of two adjacent beryllium copper tubes, which can not only achieve the sealing of the measurement while drilling instrument, but also reduce vibration to a certain extent. Attached Figure Description

[0049] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0050] Figure 1 This is an overall schematic diagram of the vibration damper installed inside the beryllium copper tube in Embodiment 1 of the present invention;

[0051] Figure 2 This is an overall schematic diagram of the vibration damper placed inside the beryllium copper tube in Embodiment 1 of the present invention;

[0052] Figure 3 This is a partial schematic diagram of the vibration damper installed inside the beryllium copper tube in Embodiment 1 of the present invention;

[0053] Figure 4 This is a partial schematic diagram of the vibration damper placed inside the beryllium copper tube in Embodiment 1 of the present invention;

[0054] Figure 5 This is a schematic diagram of the displacement of the clamping parts before and after the installation of the shock absorber in Embodiment 1 of the present invention. In the figure, a is the displacement of the clamping plate and b is the displacement of the adjusting plate.

[0055] Figure 6 This is a schematic diagram of the flexible buffer in Embodiment 1 of the present invention;

[0056] Figure 7 This is a schematic diagram of the vibration damper installed inside the beryllium copper tube in Embodiment 2 of the present invention;

[0057] Figure 8 This is a schematic diagram of the vibration damper placed inside the beryllium copper tube in Embodiment 2 of the present invention;

[0058] Figure 9 This is a schematic diagram of the vibration damper installed inside the beryllium copper tube in Embodiment 3 of the present invention;

[0059] Figure 10 This is a schematic diagram of the flexible buffer in Embodiment 4 of the present invention.

[0060] The attached diagram shows the markings and corresponding component names:

[0061] 1-Sliding buffer; 2-Positioning component; 3-Inner expansion component; 4-Flexible buffer; 5-Clamping component; 6-Fixing module; 7-Buffer column; 8-Annular vibration damper; 9-Telescopic rod; 10-Vibration damping block;

[0062] 11-Sliding sleeve; 12-Pressure plate; 13-First inclined surface;

[0063] 21-Positioning cylinder; 22-Connecting cylinder; 23-Second inclined surface; 24-Sliding cavity; 25-Through groove; 26-Limiting groove;

[0064] 31-Vertical rod; 32-First wedge block; 33-Limiting component;

[0065] 41- Gap;

[0066] 51-Clamping plate; 52-Adjusting plate; 53-First spring; 54-Second wedge block; 55-Second spring; 56-Baffle;

[0067] 100 - Beryllium copper tube; 200 - Male connector; 300 - Female connector; 400 - Electronic components;

[0068] 201 - First equal diameter section; 202 - Threaded connection section; 203 - Second equal diameter section; 204 - First sealing ring; 205 - Second sealing ring. Detailed Implementation

[0069] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. The illustrative embodiments and descriptions of this invention are for illustrative purposes only and are not intended to limit the invention. The embodiments described below are some, but not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0070] In the following description, numerous specific details are set forth to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that these specific details are not necessary to practice the invention. In other embodiments, well-known structures, materials, or methods are not specifically described to avoid obscuring the invention. Unless otherwise specified, the materials, instruments, and reagents used in the following embodiments are commercially available. Unless otherwise specified, the techniques used in the embodiments are conventional methods well known to those skilled in the art.

[0071] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0072] Example 1:

[0073] To accommodate the installation of electronic components 400 within beryllium copper tubes 100 of varying lengths, such as... Figures 1-6 As shown, this embodiment provides a vibration damper for a drilling instrument, comprising:

[0074] The fixing module 6 is used to mount the electronic component 400. Preferably, the fixing module 6 has a vibration damping function; the axial end of the fixing module 6 is provided with a through hole for signal lines to pass through. Specifically, the fixing module 6 can be made entirely of rubber with vibration damping function, or only the axial ends of the fixing module 6 can be made of rubber with vibration damping function. Furthermore, in order to avoid the vibration of the beryllium copper tube 100 being directly transmitted to the fixing module 6, after the vibration damper is installed, there is a certain gap between the outer wall of the fixing module 6 and the inner wall of the beryllium copper tube 100. That is, in this embodiment, the fixing module 6 preferably does not directly contact the inner wall of the beryllium copper tube 100, but is connected to the end connecting module through the axial end of the fixing module 6, and then the end connecting module is fixed to the inner wall of the beryllium copper tube 100, thereby fixing the vibration damper to the inner wall of the beryllium copper tube 100.

[0075] Preferably, in order to achieve heat dissipation of the electronic components 400 inside the fixed module 6, the fixed module 6 is configured as a non-enclosed structure, that is, several heat dissipation holes can be provided on the side wall of the fixed module 6. In order to facilitate the installation of the electronic components 400 inside the fixed module 6, the fixed module 6 can be composed of two detachable connected parts, specifically, the two parts can be connected by a plug-in method.

[0076] The end connection modules are located at both axial ends of the fixed module 6. Specifically, they can be recessed inward at the axial ends of the fixed module 6 to form protrusions with smaller inner diameters. Connection is achieved by inserting the protrusions into the ends of the end connection modules. The end connection modules can not only be used to install the vibration damper inside the beryllium copper tube 100, but also to achieve vibration damping function.

[0077] The end connection module includes a sliding buffer 1, a positioning component 2, an inner expansion component 3, a flexible buffer 4, and a clamping component 5; the interaction of the sliding buffer 1, the positioning component 2, the inner expansion component 3, the flexible buffer 4, and the clamping component 5 achieves buffering and fixation within the beryllium copper tube 100.

[0078] Specifically, the positioning component 2 includes a positioning cylinder 21, both ends of which are open. A connecting cylinder 22 is provided at one end of the positioning cylinder 21. The outer diameter of the connecting cylinder 22 is larger than the outer diameter of the positioning cylinder 21. The end of the connecting cylinder 22 away from the positioning cylinder 21 is an open end. The axial end of the fixing module 6 is inserted into the end of the connecting cylinder 22 away from the positioning cylinder 21 to connect the fixing module 6 with the connecting cylinder 22. A sliding cavity 24 is formed inside the connecting cylinder 22, and a through groove 25 is provided on the side wall of the connecting cylinder 22. The through groove 25 is used to connect the radial inner side and the outer side of the connecting cylinder 22. Preferably, the length of the protrusion at the axial end of the fixing module 6 is equal to the distance between the end of the connecting cylinder 22 and the through groove 25. When the fixing module 6 is inserted into the connecting cylinder 22, the connecting cylinder 22 and the fixing module 6 are in close contact, which can better achieve vibration reduction. Furthermore, the end of the fixing module 6 contacts the clamping component 5 and provides a certain support for the clamping component 5.

[0079] Specifically, the sliding buffer 1 includes a sliding sleeve 11, one end of which is a closed end with a through hole for passing a signal line, and the other end is an open end. The outer wall of the open end of the sliding sleeve 11 extends radially outward to form a pressure plate 12, which is disposed opposite to the end of the connecting cylinder 22. The sliding sleeve 11 is slidably disposed on the outer wall of the positioning cylinder 21.

[0080] The flexible buffer 4 is sleeved on top of the connecting cylinder 22 and deforms under the pressure of the pressure plate 12 and the connecting cylinder 22. The specific material of the flexible buffer 4 can be any elastic material that can deform under pressure. In this embodiment, in order to better achieve vibration reduction, the flexible buffer 4 is a complete ring. In the initial state, in order to facilitate the installation of the vibration damper, there is a certain gap between the pressure plate 12, the flexible buffer 4, and the outer wall of the connecting cylinder 22 and the inner wall of the beryllium copper tube. When the sliding buffer 1 slides towards the connecting cylinder 22 and contacts the flexible buffer 4, the flexible buffer 4 deforms under the pressure of the connecting cylinder 22 and the pressure plate 12, causing it to extend radially and abut against the inner wall of the beryllium copper tube 100.

[0081] In a preferred embodiment, to better compress the flexible buffer 4 to abut against the inner wall of the beryllium copper tube 100, a second inclined surface 23 is formed on the outer side of the radial end face of the connecting cylinder 22, and the flexible buffer 4 is fitted onto the second inclined surface 23. A first inclined surface 13 is formed on the outer side of the radial end face of the pressure plate 12 opposite to the connecting cylinder 22. The compression of the first inclined surface 13 and the second inclined surface 23 causes the flexible buffer 4 to deform and abut against the inner wall of the beryllium copper tube 100. The first inclined surface 13 and the second inclined surface 23 are arranged in a mirror image, and the distance between the first inclined surface 13 and the second inclined surface 23 gradually increases from one end of the positioning cylinder 21 to one end of the beryllium copper tube 100. When the flexible buffer 4 is subjected to axial compression, it extends radially. The first inclined surface 13 and the second inclined surface 23 of the above structure make the space at both ends of the flexible buffer 4 different when it is compressed. The space on the side closer to the beryllium copper tube 100 is larger. Therefore, when the flexible buffer 4 is subjected to axial compression, it can better achieve contact with the inner wall of the beryllium copper tube 100.

[0082] Specifically, the clamping component 5 includes a clamping plate 51 and an adjusting plate 52 arranged in parallel. The clamping plate 51 and the adjusting plate 52 are connected by a first spring 53. The clamping plate 51 is slidably disposed in the through groove 25 on the side wall of the connecting cylinder 22. The first spring 53 and the adjusting plate 52 are located in the sliding cavity 24, and the clamping component 5 can be radially displaced under the action of external force. In this embodiment, at least two clamping components 5 are used to fix the vibration damper to the inner wall of the beryllium copper tube 100.

[0083] One end of the inner expansion member 3 is connected to the closed end of the sliding sleeve 11. The inner expansion member 3 causes the adjusting plate 52 to move radially until it stably abuts against the inner wall of the beryllium copper tube 100. Specifically, the inner expansion member 3 includes a vertical rod 31. One end of the vertical rod 31 is connected to the closed end of the sliding sleeve 11 and is coaxially disposed inside the positioning member 2. A first wedge block 32 is disposed on the outer wall of the vertical rod 31. A second wedge block 54 is disposed on the adjusting plate 52 to cooperate with the first wedge block 32. The inclined surfaces of the first wedge block 32 and the second wedge block 54 are used to convert the axial displacement of the vertical rod 31 into the radial displacement of the clamping member 5. Figures 1-6 The radial width of the first wedge 32 shown gradually decreases from the closed end of the sliding sleeve 11 to the other end, and the radial width of the second wedge 54 gradually decreases from the one end of the fixed module 6 to the other end, while the fixed module 6 is arranged opposite to the closed end of the sliding sleeve 11.

[0084] When the card plate 51 moves to abut against the inner wall of the beryllium copper tube 100, the first spring 53 is in a compressed state, and the flexible buffer 4 deforms and abuts against the inner wall of the beryllium copper tube 100.

[0085] In a preferred embodiment, to improve the stability of the action of the inner expansion member 3 on the clamping member 5, it is necessary to improve the stability of the sliding sleeve 11 after it slides to the designated position. In this embodiment, a limiting member 33 can be provided on the outer wall of the vertical rod 31 above the first wedge block 32. The limiting member 33 abuts or engages with the inner wall of the positioning cylinder 21, thereby improving the overall stability based on the relationship between the limiting member 33 and the inner wall of the positioning cylinder 21. In this embodiment, the limiting member 33 is a wedge-shaped positioning block or a positioning block with an arc-shaped end, and the stability is improved by the friction generated by the contact between the limiting member 33 and the inner wall of the positioning cylinder 21.

[0086] The process of fixing the vibration damper to the inner wall of the beryllium copper tube 100 in this embodiment is as follows:

[0087] S1. Install the electronic component 400 into the fixed module 6;

[0088] S2. Connect the two ends of the fixed module 6 to the two connecting cylinders 22 respectively to form a vibration damper;

[0089] S3. Place the vibration damper inside the beryllium copper tube 100. First, fix one end of the vibration damper with a fixing component, and then apply an axial thrust to the sliding buffer 1 at the other end of the vibration damper until the inner expansion component 3 causes the clamping plate 51 to abut against the inner wall of the beryllium copper tube 100. At this time, the flexible buffer 4 deforms and abuts against the inner wall of the beryllium copper tube 100. Then perform the same operation on one end of the vibration damper until both ends of the vibration damper are fixed to the inner wall of the beryllium copper tube 100.

[0090] Specifically, the process by which the inner expansion member 3 causes the clamping plate 51 to abut against the inner wall of the beryllium copper tube 100 is as follows:

[0091] As the sliding buffer 1 moves closer to the connecting cylinder 22, the vertical rod 31 moves along with it. When it reaches the point where the pressure plate 12 begins to contact the flexible buffer 4, the first wedge block 32 and the second wedge block 54 contact and generate a radial thrust on the clamping member 5. As the sliding buffer 1 continues to move, the clamping plate 51 first contacts the inner wall of the beryllium copper tube 100. At this time, the first spring 53 is not yet compressed or is only slightly compressed, and the flexible buffer 4 also begins to deform. The sliding buffer 1 continues to move. The inner expansion member 3 continuously exerts a radial thrust on the clamping member 5. At this time, only the adjusting plate 52 is displaced, while the clamping plate 51 is limited by the beryllium copper tube 100 and cannot move. The first spring 53 is compressed by the clamping plates 51 and the adjusting plate 52 on both sides, generating a restoring force. This restoring force is used to fix the clamping member 5 to the inner wall of the beryllium copper tube 100, thereby fixing the entire shock absorber to the inner wall of the beryllium copper tube 100. At this time, the flexible buffer member 4 undergoes a large deformation and abuts against the inner wall of the beryllium copper tube 100. During the entire radial movement of the clamping member 5, the radial displacement of the adjusting plate 52 is greater than the radial displacement of the clamping plate 51. That is, the displacement of the clamping plate 51 is as follows: Figure 5 As shown in Figure a, the displacement of the adjusting plate 52 is as follows:Figure 5 As shown in the diagram, b and a are less than b, to ensure that the first spring 53 is compressed to generate a restoring force. When it is necessary to separate the shock absorber from the beryllium copper tube 100, the sliding buffer 1 can be returned to its initial position. The adjusting plate 52 returns to its original position under the restoring force of the first spring 53. The locking plate 51 may not be able to return to its original position completely. In a preferred embodiment, a baffle 56 is provided at the end of the locking plate 51 away from the fixing module 6. A second spring 55 is provided between the baffle 56 and the inner wall of the connecting cylinder 22. When the shock absorber is fixed to the inner wall of the beryllium copper tube 100, the second spring 55 is compressed. When separated, the locking plate 51 can return to its original position under the restoring force of the second spring 55.

[0092] When the flexible buffer 4 in this embodiment is compressed and deformed, the flexible buffer 4 abuts against the inner wall of the beryllium copper tube 100. When the beryllium copper tube 100 is vibrated, radial vibration reduction can be achieved through the flexible buffer 4. After the vibration is transmitted to the flexible buffer 4 radially, since the flexible buffer 4 is positioned between the sliding buffer 1 and the positioning member 2 in the axial direction, the vibration received by the flexible buffer 4 is transmitted to the sliding buffer 1 and the positioning member 2 in two directions. The positioning member 2 then transmits the vibration to the fixing module 6 through the clamping member 5. After multi-stage vibration reduction, the electronic components 400 in the fixing module 6 can be effectively vibration reduced.

[0093] Furthermore, the end connection module of this embodiment does not rely on the axial force at both ends to fix the vibration damper inside the beryllium copper tube 100. Instead, it uses the radial force applied by the clamping member 5 to fix the vibration damper inside the beryllium copper tube 100. In this way, the vibration damper can be fixed at any position inside the beryllium copper tube 100, which is applicable to beryllium copper tubes 100 of different lengths.

[0094] Example 2:

[0095] like Figure 7 , Figure 8 As shown, this embodiment is based on embodiment 1, and the difference between the two is that the specific structure of the limiting member 33 is different. In this embodiment, the limiting member 33 is an elastic positioning block, and a limiting groove 26 that cooperates with the elastic positioning block is provided on the inner wall of the positioning cylinder 21. When the sliding buffer member 1 moves to make the card plate 51 abut against the inner wall of the beryllium copper tube 100 and the first spring 53 generates a restoring force, the elastic positioning block moves into the limiting groove 26.

[0096] In this embodiment, since the limiting member 33 is elastic, its radial length can change within a certain range. When the limiting member 33 is located in the positioning cylinder 21 without the limiting groove 26, the limiting member 33 is compressed. When it moves to the limiting groove 26, it can be inserted into the limiting groove 26 under the action of the restoring force, so as to achieve a stable connection between the vertical rod 31 and the positioning cylinder 21.

[0097] In a specific case, the elastic positioning block includes a first fixed block and a second fixed block, which are connected by a third spring. The first fixed block is connected to the outer wall of the vertical rod 31. When the elastic positioning block is not moved into the limiting groove 26, the third spring is in a compressed state.

[0098] Example 3:

[0099] like Figure 9 As shown, this embodiment is based on embodiment 1, and the difference from embodiment 1 is that: an annular damping member 8 is provided on the outer wall of the sliding sleeve 11 above the pressure plate 12, and a buffer column 7 is provided between the annular damping member 8 and the pressure plate 12.

[0100] The outer wall of the annular damper 8 is in contact with the inner wall of the beryllium copper tube 100, and there are gaps between the buffer column 7 and the inner wall of the beryllium copper tube 100 and the outer wall of the sliding sleeve 11.

[0101] In this embodiment, by setting the annular damping component 8 and the buffer column 7, the vibration reduction effect of the damper can be better achieved. The annular damping component 8, the flexible buffer component 4 and the clamping component 5 jointly share the radial vibration of the beryllium copper tube 100, and the axial multi-stage vibration reduction is achieved through the connection of the buffer column 7 and the positioning component 2, thereby improving the vibration reduction effect.

[0102] In a preferred embodiment, a buffer cavity is formed inside the annular damper 8 to improve the vibration reduction effect.

[0103] Example 4:

[0104] like Figure 10 As shown, this embodiment is based on embodiment 1, and the difference between the two is that the specific shape of the flexible buffer 4 is different. In this embodiment, the flexible buffer 4 is a ring with a notch 41 on the edge. The notch 41 in this embodiment can improve the vibration reduction effect of the flexible buffer 4. The size of the notch 41 should not be too large so as to affect the deformation of the flexible buffer 4 and the contact effect with the beryllium copper tube 100.

[0105] Example 5:

[0106] A measurement-while-drilling instrument is composed of several sections of beryllium copper tubes 100 connected sequentially. Electronic components 400 are installed inside each beryllium copper tube 100 via vibration dampers as described in any one of Examples 1-4. Specifically, each of the axial ends of the beryllium copper tube 100 is provided with a mating male connector 200 and a female connector 300; the mating of the male connector 200 and the female connector 300 enables the connection of adjacent sections of beryllium copper tube 100. During use, a centralizer can also be installed between the female connector 300 and the beryllium copper tube 100.

[0107] In a preferred embodiment, the male connector 200 includes a threaded connection section 202 for connection with the female connector 300. The axial ends of the threaded connection section 202 are respectively provided with a first equal diameter section 201 and a second equal diameter section 203. The outer walls of the first equal diameter section 201 and the second equal diameter section 203 are respectively provided with a first sealing ring 204 and a second sealing ring 205.

[0108] In a preferred embodiment, both the male connector 200 and the female connector 300 are provided with damping blocks 10; both the male connector 200 and the female connector 300 are provided with telescopic rods 9 for applying axial thrust to the sliding buffer 1. The telescopic rods 9 can be inserted into the damping blocks 10, and their ends are connected to the male connector 200 or the female connector 300.

[0109] In this embodiment, an axial thrust can be applied to the sliding buffer 1 of the vibration damper through the telescopic rod 9 without the need for additional external force. At the same time, the vibration damping block 10 also has a vibration damping effect. Furthermore, the vibration damping block 10 is connected to the vibration damper inside the beryllium copper tube 100 through the telescopic rod 9, and together they form axial vibration damping, which is beneficial to improving the vibration damping effect of the drilling measurement instrument.

[0110] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0111] It should be noted that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the disclosed technical content. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

Claims

1. A vibration damper for drilling instruments, characterized in that, include: A fixing module (6) is used to install electronic components (400), and the fixing module (6) has a vibration reduction function; An end connection module is provided at both ends of the fixed module (6) and is used to install the vibration damper inside the beryllium copper tube (100); the end connection module includes a sliding buffer (1), a positioning component (2), an inner expansion component (3), a flexible buffer (4), and a clamping component (5). The positioning component (2) includes a positioning cylinder (21), and a connecting cylinder (22) is provided at one end of the positioning cylinder (21). The outer diameter of the connecting cylinder (22) is larger than the outer diameter of the positioning cylinder (21). The sliding buffer (1) includes a sliding sleeve (11), one end of which is a closed end and the other end is an open end. The open end of the sliding sleeve (11) extends radially outward to form a pressure plate (12). The sliding sleeve (11) is slidably disposed on the outer wall of the positioning cylinder (21). The flexible buffer (4) is sleeved on the top of the connecting cylinder (22), and it deforms under the pressure of the pressure plate (12) and the connecting cylinder (22); The clamping member (5) includes a clamping plate (51) and an adjusting plate (52). The clamping plate (51) and the adjusting plate (52) are connected by a first spring (53). The clamping plate (51) is slidably disposed on the side wall of the connecting cylinder (22). One end of the inner expansion member (3) is connected to the closed end of the sliding sleeve (11), and the inner expansion member (3) causes the adjusting plate (52) to move radially; When the card plate (51) moves to abut against the inner wall of the beryllium copper tube (100), the first spring (53) is in a compressed state, and the flexible buffer (4) deforms and abuts against the inner wall of the beryllium copper tube (100).

2. A vibration damper for drilling instruments according to claim 1, characterized in that, The outer side of the radial end face of the connecting cylinder (22) forms a second inclined surface (23), and the flexible buffer (4) is sleeved on the second inclined surface (23); the outer side of the radial end face of the pressure plate (12) opposite to the connecting cylinder (22) forms a first inclined surface (13), and the flexible buffer (4) is deformed by the compression of the first inclined surface (13) and the second inclined surface (23) and comes into contact with the inner wall of the beryllium copper tube (100).

3. A vibration damper for a drilling instrument according to claim 2, characterized in that, The first inclined surface (13) and the second inclined surface (23) are arranged in a mirror image, and the distance between the first inclined surface (13) and the second inclined surface (23) gradually increases from one end of the positioning cylinder (21) to one end of the beryllium copper tube (100).

4. A vibration damper for drilling instruments according to claim 1, characterized in that, The inner expansion member (3) includes a vertical rod (31), one end of which is connected to the closed end of the sliding sleeve (11) and is disposed inside the positioning member (2). A first wedge block (32) is disposed on the outer wall of the vertical rod (31); a second wedge block (54) is disposed on the adjusting plate (52) to cooperate with the first wedge block (32).

5. A vibration damper for a drilling instrument according to claim 4, characterized in that, The outer wall of the vertical rod (31) is provided with a limiting member (33) above the first wedge block (32); the limiting member (33) abuts or engages with the inner wall of the positioning cylinder (21).

6. A vibration damper for a drilling instrument according to claim 5, characterized in that, The limiting member (33) is a wedge-shaped positioning block or a positioning block with an arc end, or the limiting member (33) is an elastic positioning block. A limiting groove (26) that cooperates with the elastic positioning block is provided on the inner wall of the positioning cylinder (21). When the sliding buffer (1) moves to make the card plate (51) abut against the inner wall of the beryllium copper tube (100), the elastic positioning block moves into the limiting groove (26).

7. A vibration damper for a drilling instrument according to claim 6, characterized in that, The elastic positioning block includes a first fixing block and a second fixing block. The first fixing block and the second fixing block are connected by a third spring. The first fixing block is connected to the outer wall of the vertical rod (31). When the elastic positioning block does not move into the limiting groove (26), the third spring is in a compressed state.

8. A vibration damper for a drilling instrument according to claim 1, characterized in that, A baffle (56) is provided at the end of the card plate (51) away from the fixing module (6), and a second spring (55) is provided between the baffle (56) and the inner wall of the connecting cylinder (22).

9. A vibration damper for a drilling instrument according to claim 1, characterized in that, The flexible buffer (4) is in the shape of a complete ring or a ring with a notch (41) on the edge.

10. A vibration damper for a drilling instrument according to claim 1, characterized in that, The outer wall of the sliding sleeve (11) is provided with an annular damping member (8) above the pressure plate (12), and a buffer column (7) is provided between the annular damping member (8) and the pressure plate (12). The outer wall of the annular damping member (8) is in contact with the inner wall of the beryllium copper tube (100), and there are gaps between the buffer column (7) and the inner wall of the beryllium copper tube (100) and the outer wall of the sliding sleeve (11).

11. A vibration damper for a drilling instrument according to claim 10, characterized in that, A buffer cavity is formed inside the annular damping member (8).

12. The method for installing a vibration damper as described in any one of claims 1-11, characterized in that, Includes the following steps: S1. Install the electronic component (400) into the fixed module (6); S2. The two ends of the fixed module (6) are respectively connected to the two connecting cylinders (22) to form the vibration damper; S3. Place the vibration damper inside the beryllium copper tube (100). First, fix one end of the vibration damper with a fixed component, and then apply an axial thrust to the sliding buffer (1) at the other end of the vibration damper until the inner expansion member (3) causes the clamping plate (51) to abut against the inner wall of the beryllium copper tube (100). At this time, the flexible buffer (4) deforms and abuts against the inner wall of the beryllium copper tube (100). Then perform the same operation on one end of the vibration damper until both ends of the vibration damper are fixed to the inner wall of the beryllium copper tube (100).

13. A drilling measurement instrument comprising a vibration damper as described in any one of claims 1-11, characterized in that, It is formed by sequentially connecting several sections of the beryllium copper tube (100), and the electronic components (400) are installed inside the beryllium copper tube (100) through the vibration damper.

14. The measurement-while-drilling instrument according to claim 13, characterized in that, The beryllium copper tube (100) is provided with male connectors (200) and female connectors (300) that mate with each other at both axial ends. The male connector (200) includes a threaded connection section (202) for connecting with the female connector (300). The threaded connection section (202) has a first equal diameter section (201) and a second equal diameter section (203) at its two axial ends. The outer walls of the first equal diameter section (201) and the second equal diameter section (203) are respectively provided with a first sealing ring (204) and a second sealing ring (205).

15. The measurement-while-drilling instrument according to claim 14, characterized in that, Both the male connector (200) and the female connector (300) are provided with vibration damping blocks (10); both the male connector (200) and the female connector (300) are provided with telescopic rods (9) for applying axial thrust to the sliding buffer (1).

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