Shock absorber and measurement-while-drilling directional probe system
Patent Information
- Application Number
- CN202522708072.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-22
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-12-22
AI Technical Summary
[0003]定向探管系统中的扶正器是轴向振动的主要振源，因此，需要设置减振器进行减振，现有技术中，一般的减振器为弹簧结构，弹簧结构的减振器难以适应井内复杂环境，使得减振器使用寿命降低，且随着使用时间增长，减振器效果也会逐渐降低
[0025]本实用新型提供的减振器中，减振套筒与扶正器连接，减振芯管与上游机构连接，当扶正器产生振动时，减振套筒受到振动，并将振动传递给减振芯体，减振芯体能够减振和缓冲，以减小传递给减振芯管的振动，进而实现降低振动对上游机构的影响；且通过在减振套筒内壁设置第一环形隔板和在减振芯管外壁设置第二环形隔板，使得形成的减振芯体能够使减振套管和减振芯管弹性连接，避免了使用传统的限位结构进行连接；另外，第一环形隔板和第二环形隔板错位分布，使得形成的减振芯体的内壁和外壁形成类似波浪曲线，能够增加减振芯体柔韧性，可以避免减振芯体出现应力集中，使得减振芯体受力均匀，提高减振性能。
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Figure CN224903851U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of directional drilling technology, and in particular to a vibration damper and a directional probe system for measurement while drilling. Background Technology
[0002] The directional drilling system in measurement-while-drilling (MWD) equipment is mainly used to measure the spatial attitude of the drill string within the well. Its core function is to acquire key parameters such as the azimuth, dip angle, and tool face angle of the drill bit in three-dimensional space in real time, providing accurate guidance data for directional drilling. In the exploration and development of resources such as oil and natural gas, directional drilling technology is widely used because it enables precise control of wells with complex trajectories.
[0003] The centralizer in the directional drilling system is the main source of axial vibration. Therefore, vibration dampers are required to reduce vibration. In the existing technology, the vibration dampers are generally spring structures. Spring structure vibration dampers are difficult to adapt to the complex environment inside the well, which reduces the service life of the vibration dampers. Moreover, the vibration damping effect will gradually decrease as the service time increases. Utility Model Content
[0004] The present invention provides a vibration damper and a drilling measurement directional probe system, which can improve the vibration damping effect and service life.
[0005] The above-mentioned technical problems are solved by the following technical solutions:
[0006] Shock absorbers, including:
[0007] A vibration damping sleeve, wherein the inner wall of the vibration damping sleeve is provided with a first annular partition;
[0008] A vibration damping core tube, wherein a second annular partition is provided on the outer wall of the vibration damping core tube, the vibration damping core tube is disposed inside the vibration damping sleeve, and the first annular partition and the second annular partition are staggered.
[0009] The gap between the damping sleeve and the damping core tube is filled with a damping medium, which solidifies in the gap to form a damping core with elastic properties.
[0010] In one embodiment, the inner circular surface of the first annular partition is provided with a first opening groove so that the outer wall of the vibration damping core forms an outer limiting post;
[0011] The outer circular surface of the second annular partition is provided with a second opening groove so that the inner wall of the vibration damping core forms an inner limiting post.
[0012] In one embodiment, both the first opening groove and the second opening groove are semi-circular grooves.
[0013] In one embodiment, the inner circumferential surface of the first annular partition is provided with a plurality of circumferentially distributed first opening slots; the outer circumferential surface of the second annular partition is provided with a plurality of circumferentially distributed second opening slots.
[0014] In one embodiment, the diameter of the inner circular surface of the first annular partition is equal to the diameter of the outer circular surface of the second annular partition.
[0015] In one embodiment, the inner wall of the damping sleeve is provided with a plurality of first annular baffles spaced apart along its own axis, and the outer wall of the damping core tube is provided with a plurality of second annular baffles spaced apart along its own axis, wherein the plurality of first annular baffles and the plurality of second annular baffles are alternately staggered in sequence.
[0016] The spacing between any two adjacent first and second annular partitions is equal.
[0017] In one embodiment, the damping medium is liquid rubber or liquid silicone.
[0018] In one embodiment, the damping sleeve is connected to the centralizer via fasteners;
[0019] The straightener includes a straightening frame, which is inserted into the vibration damping sleeve, and the fastener is used to fasten the vibration damping sleeve and the straightening frame.
[0020] In one embodiment, the sidewall of the vibration damping sleeve is provided with a plurality of circumferentially distributed through holes;
[0021] The outer wall of the straightening frame is provided with multiple threaded holes that correspond one-to-one with the through holes.
[0022] The fastener includes a plurality of fastening screws corresponding to the through holes and a plurality of fastening pads respectively sleeved on the corresponding fastening screws. The plurality of fastening pads are respectively disposed in the corresponding through holes, and the fastening screws are screwed into the corresponding threaded holes.
[0023] The measurement-while-drilling directional probe system includes the vibration damper described in any of the above schemes.
[0024] The beneficial effects of this utility model are as follows:
[0025] In the vibration damper provided by this utility model, the vibration damping sleeve is connected to the centralizer, and the vibration damping core tube is connected to the upstream mechanism. When the centralizer vibrates, the vibration damping sleeve is vibrated and transmits the vibration to the vibration damping core. The vibration damping core can dampen and buffer the vibration, thereby reducing the vibration transmitted to the vibration damping core tube and thus reducing the impact of vibration on the upstream mechanism. Furthermore, by setting a first annular partition on the inner wall of the vibration damping sleeve and a second annular partition on the outer wall of the vibration damping core tube, the formed vibration damping core can elastically connect the vibration damping sleeve and the vibration damping core tube, avoiding the use of traditional limiting structures for connection. In addition, the first and second annular partitions are staggered, so that the inner and outer walls of the formed vibration damping core form a wave-like curve, which can increase the flexibility of the vibration damping core, avoid stress concentration in the vibration damping core, make the vibration damping core uniformly stressed, and improve the vibration damping performance. Attached Figure Description
[0026] Figure 1 This is a partial schematic diagram of the directional probe system for measurement while drilling provided in this embodiment of the present invention;
[0027] Figure 2 yes Figure 1 Enlarged view of the structure at point A in the middle;
[0028] Figure 3 This is a schematic diagram of the structure of the vibration damping sleeve involved in the embodiment of this utility model;
[0029] Figure 4 This is a schematic diagram of the structure of the vibration damper provided in this embodiment of the utility model.
[0030] In the picture:
[0031] 1. Vibration damper; 11. Vibration damping sleeve; 111. First annular partition; 112. First opening groove; 113. Through hole; 12. Vibration damping core tube; 121. Second annular partition; 122. Second opening groove; 13. Vibration damping core; 131. First annular groove; 132. Outer limiting post; 14. Fastener; 141. Fastening screw; 142. Fastening pad;
[0032] 2. Straightener; 21. Straightening frame. Detailed Implementation
[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0034] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element 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 application.
[0035] 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.
[0036] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0037] like Figures 1-4 As shown, this embodiment of the invention provides a vibration damper 1 and a measurement-while-drilling (MWD) directional drilling system. The MWD directional drilling system includes a centralizer 2, a vibration damper 1, a magnetometer, and a gravimeter. The vibration damper 1 is disposed at the upper end of the centralizer 2, and upstream mechanisms such as the magnetometer and gravimeter are disposed at the upper end of the vibration damper 1. The vibration damper 1 is used to buffer the vibration generated by the centralizer 2 to reduce the impact of the vibration on the upstream mechanisms.
[0038] Specifically, the vibration damper 1 includes a vibration damping sleeve 11 and a vibration damping core tube 12. The inner wall of the vibration damping sleeve 11 is provided with a first annular partition 111; the outer wall of the vibration damping core tube 12 is provided with a second annular partition 121. The vibration damping core tube 12 is disposed inside the vibration damping sleeve 11, and the first annular partition 111 and the second annular partition 121 are staggered.
[0039] When the damping core tube 12 is placed inside the damping sleeve 11, there is a gap between the damping core tube 12 and the damping sleeve 11. By filling the gap with damping medium, the damping medium can form a damping core 13 with elastic properties after solidification.
[0040] The outer wall of the vibration damping core 13 forms a first annular groove 131 covering the first annular partition 111 in the area corresponding to the first annular partition 111. The inner wall of the vibration damping core 13 forms a second annular groove covering the second annular partition 121 in the area corresponding to the second annular partition 121. The vibration damping core 13 is engaged with the first annular partition 111 through the first annular groove 131 to achieve an elastic connection between the vibration damping core 13 and the vibration damping sleeve 11. The vibration damping core 13 is engaged with the second annular partition 121 through the second annular groove to achieve an elastic connection between the vibration damping core 13 and the vibration damping core tube 12.
[0041] In this vibration damper 1, the damping sleeve 11 is connected to the centralizer 2, and the damping core tube 12 is connected to the upstream mechanism. When the centralizer 2 vibrates, the damping sleeve 11 is vibrated and transmits the vibration to the damping core 13. The damping core 13 can dampen and buffer the vibration, thereby reducing the vibration transmitted to the damping core tube 12 and thus reducing the impact of vibration on the upstream mechanism. Furthermore, by setting a first annular partition 111 on the inner wall of the damping sleeve 11 and a second annular partition 121 on the outer wall of the damping core tube 12, the formed damping core 13 can elastically connect the damping sleeve 11 and the damping core tube 12, avoiding the use of traditional limiting structures for connection. In addition, the first annular partition 111 and the second annular partition 121 are staggered, so that the inner and outer walls of the formed damping core 13 form a wave-like curve, which can increase the flexibility of the damping core 13, avoid stress concentration in the damping core 13, make the damping core 13 uniformly stressed, and improve the damping performance and service life.
[0042] Optionally, the damping medium can be selected as liquid rubber or liquid silicone. By filling the gaps with liquid rubber or liquid silicone, the liquid rubber or liquid silicone can form a damping core 13 with elastic properties after solidification. The rubber material and silicone material have good damping characteristics.
[0043] like Figures 3-4 As shown, in order to further prevent the vibration damping core 13 from rotating relative to the vibration damping sleeve 11, the inner circular surface of the first annular partition 111 is provided with a first opening groove 112. When the vibration damping medium is filled in the gap, an outer limiting post 132 can be formed on the outer wall of the vibration damping core 13, that is, an outer limiting post 132 is formed in the first annular groove 131. The outer limiting post 132 can prevent the vibration damping core 13 and the vibration damping sleeve 11 from rotating relative to each other.
[0044] Optionally, the inner circular surface of the first annular partition 111 is provided with a plurality of first opening slots 112, so that a plurality of circumferentially distributed outer limiting posts 132 can be formed on the outer wall of the vibration damping core 13, making the structure more stable.
[0045] To further prevent the vibration damping core 13 from rotating relative to the vibration damping core tube 12, a second opening groove 122 is provided on the outer circular surface of the second annular partition 121. When the vibration damping medium is filled in the gap, an inner limiting post can be formed on the inner wall of the vibration damping core 13, that is, an inner limiting post is formed in the second annular groove. The inner limiting post can prevent the vibration damping core 13 and the vibration damping core tube 12 from rotating relative to each other.
[0046] Optionally, the inner circular surface of the second annular partition 121 is provided with a plurality of second opening slots 122, so that a plurality of circumferentially distributed inner limiting columns can be formed on the inner wall of the vibration damping core 13, making the structure more stable.
[0047] Optionally, the inner wall of the damping sleeve 11 is provided with a plurality of first annular partitions 111 spaced apart along its own axis, and the outer wall of the damping core tube 12 is provided with a plurality of second annular partitions 121 spaced apart along its own axis. The plurality of first annular partitions 111 and the plurality of second annular partitions 121 are alternately staggered. By providing a plurality of first annular partitions 111 and second annular partitions 121, a plurality of first annular grooves 131 and a plurality of second annular grooves are formed on the outer and inner walls of the formed damping core 13, respectively, thereby making the elastic connection between the damping sleeve 11 and the damping core tube 12 through the damping core 13 more stable.
[0048] Furthermore, the spacing between any adjacent first annular partition 111 and second annular partition 121 is equal, which makes the damping core 13 subjected to uniform force and improves the damping performance of the damper 1.
[0049] In this embodiment, three first annular partitions 111 are provided, and two second annular partitions 121 are provided.
[0050] Optionally, the diameter of the inner circle of the first annular partition 111 is equal to the diameter of the outer circle of the second annular partition 121, which makes it easier to install the vibration damping core tube 12 and the vibration damping sleeve 11, making the structural design reasonable and the vibration damping core 13 subjected to uniform force.
[0051] In this embodiment, the damping sleeve 11 is connected to the centralizer 2 via fastener 14; the centralizer 2 includes a centralizer frame 21, which is inserted into the damping sleeve 11. The fastener 14 can fasten the damping sleeve 11 and the centralizer frame 21 to achieve the connection between the centralizer 2 and the damping sleeve 11, so that the vibration of the centralizer 2 can be weakened by the damper 1 to achieve buffering.
[0052] Furthermore, the side wall of the damping sleeve 11 is provided with a plurality of circumferentially distributed through holes 113; the outer wall of the straightening frame 21 is provided with a plurality of threaded holes corresponding one-to-one with the through holes 113; the fastener 14 includes a plurality of fastening screws 141 corresponding one-to-one with the through holes 113 and a plurality of fastening pads 142 respectively sleeved on the corresponding fastening screws 141. The fastening pads 142 are respectively set in the corresponding through holes 113. The fastening screws 141 are connected to the corresponding threaded holes. The fastening pads 142 are used for axial limiting so that the damping sleeve 11 cannot be dislodged from the damping frame.
[0053] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.
[0054] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A vibration damper, characterized in that, include: Vibration damping sleeve (11), the inner wall of which is provided with a first annular partition (111); The vibration damping core tube (12) has a second annular partition (121) on its outer wall. The vibration damping core tube (12) is disposed inside the vibration damping sleeve (11). The first annular partition (111) and the second annular partition (121) are staggered. The gap between the damping sleeve (11) and the damping core tube (12) is filled with a damping medium, which solidifies in the gap to form a damping core (13) with elastic properties.
2. The vibration damper according to claim 1, characterized in that, The inner circular surface of the first annular partition (111) is provided with a first opening groove (112) so that the outer wall of the vibration damping core (13) forms an outer limiting post (132); The outer circular surface of the second annular partition (121) is provided with a second opening groove (122) so that the inner wall of the vibration damping core (13) forms an inner limiting post.
3. The vibration damper according to claim 2, characterized in that, Both the first opening groove (112) and the second opening groove (122) are semi-circular grooves.
4. The vibration damper according to claim 2, characterized in that, The inner circumferential surface of the first annular partition (111) is provided with a plurality of circumferentially distributed first opening grooves (112); the outer circumferential surface of the second annular partition (121) is provided with a plurality of circumferentially distributed second opening grooves (122).
5. The vibration damper according to claim 1, characterized in that, The diameter of the inner circle of the first annular partition (111) is equal to the diameter of the outer circle of the second annular partition (121).
6. The vibration damper according to claim 1, characterized in that, The inner wall of the damping sleeve (11) is provided with a plurality of first annular partitions (111) spaced apart along its own axis, and the outer wall of the damping core tube (12) is provided with a plurality of second annular partitions (121) spaced apart along its own axis. The plurality of first annular partitions (111) and the plurality of second annular partitions (121) are alternately staggered in sequence. The spacing between any two adjacent first annular partitions (111) and second annular partitions (121) is equal.
7. The vibration damper according to any one of claims 1-6, characterized in that, The vibration damping medium is liquid rubber or liquid silicone.
8. The vibration damper according to any one of claims 1-6, characterized in that, The damping sleeve (11) is connected to the centralizer (2) by fasteners (14); The straightener (2) includes a straightening frame (21), which is inserted into the damping sleeve (11), and the fastener (14) is used to fasten the damping sleeve (11) and the straightening frame (21).
9. The vibration damper according to claim 8, characterized in that, The sidewall of the damping sleeve (11) is provided with a plurality of circumferentially distributed through holes (113); The outer wall of the straightening frame (21) is provided with a plurality of threaded holes corresponding one-to-one with the through holes (113); The fastener (14) includes a plurality of fastening screws (141) corresponding to the through holes (113) and a plurality of fastening pads (142) respectively sleeved on the corresponding fastening screws (141). The plurality of fastening pads (142) are respectively disposed in the corresponding through holes (113), and the fastening screws (141) are screwed to the corresponding threaded holes.
10. A directional drilling measurement-while-drilling system, characterized in that, Includes the vibration damper (1) as described in any one of claims 1-9 above.