Vibration friction reducing device
By combining hydraulic pulses and mechanical vibration, the problem of complex structure and easy damage to rubber parts in existing vibration friction reduction tools has been solved, achieving a highly efficient vibration friction reduction effect and improving drill bit drilling efficiency and construction efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA NAT PETROLEUM CORP
- Filing Date
- 2024-11-27
- Publication Date
- 2026-05-29
AI Technical Summary
Existing vibration friction reduction tools have complex structures and easily damaged rubber parts, resulting in poor vibration effects and difficulty in effectively reducing drill bit friction, which affects drill bit life and construction efficiency.
The system employs a hydraulic pulse generating mechanism and a rotary power generating mechanism. It utilizes the pressure of drilling fluid to generate hydraulic pulses and mechanical vibrations. The hydraulic pulse generating mechanism and the elastic element of the first tie rod are connected by the rotary power generating mechanism to achieve vibration friction reduction.
It improves vibration efficiency and drill bit drilling efficiency, shortens the construction cycle, reduces drilling costs, and has a compact structure and highly reliable power components.
Smart Images
Figure CN122106394A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of oil and natural gas extraction technology, and in particular to a vibration friction reduction device. Background Technology
[0002] With the increasing demand and extraction of oil and natural gas, there is a growing number of challenging directional wells, horizontal wells, and extended reach wells. In directional drilling of highly deviated and horizontal sections, the majority of the drill string is pressed against the well wall by its own weight, resulting in high frictional resistance during drilling. This leads to increased torque, slippage during drilling, and the inability of drilling pressure to be effectively applied to the drill bit. Consequently, situations such as drill bit screw damage, low mechanical drilling speed, and drill string sticking can easily occur.
[0003] To address these issues, engineers have developed vibration friction reduction tools, which can reduce static friction during sliding drilling to the level of dynamic friction. However, most existing vibration friction reduction tools have drawbacks such as rubber components, a long overall structure, complex power components, and poor vibration performance. Summary of the Invention
[0004] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a vibration friction reduction device that can realize vibration by means of hydraulic pulse, thereby effectively improving vibration efficiency and effect.
[0005] The specific technical solution of this invention is as follows:
[0006] A vibration friction reduction device, the vibration friction reduction device comprising:
[0007] A housing, wherein a channel extending along an axial direction is formed within the housing;
[0008] A rotary power generating mechanism is installed in the channel, which generates rotational power when the fluid flows through it;
[0009] A hydraulic pulse generating mechanism is installed in the channel and is drivenly connected to the rotary power generating mechanism. The hydraulic pulse generating mechanism can generate hydraulic pulses on the flowing fluid when it rotates.
[0010] The first pull rod, at least a portion of which extends into one end of the channel, is capable of reciprocating with the housing under the action of the first elastic element and the hydraulic pulse.
[0011] Preferably, the hydraulic pulse generating mechanism includes: a rotating shaft, which is drivenly connected to the rotary power generating mechanism; a moving valve disc and a stationary valve disc sleeved on the rotating shaft, the moving valve disc being fixedly connected to the rotating shaft, the stationary valve disc being able to rotate relative to the rotating shaft, the stationary valve disc having a first flow channel hole extending along the axial direction, the moving valve disc having a second flow channel hole extending along the axial direction, and fluid input from one end of the channel flowing through the first flow channel hole and the second flow channel hole and outputting from the other end of the channel.
[0012] Preferably, the rotary power generating mechanism includes:
[0013] A first screw and a second screw are installed in the channel. The first screw and the second screw mesh with each other and form a spiral sealing line and a sealing cavity through the lead difference. When the first screw and the second screw rotate, the sealing cavity moves along the axial direction to convert the pressure energy of the fluid into the mechanical energy of the first screw and the second screw. The first screw and / or the second screw are connected to the rotating shaft for transmission.
[0014] Preferably, the vibration friction reduction device includes:
[0015] A first bearing, which serves to straighten, is sleeved on the upper body of the first screw and the upper body of the second screw. One side of the upper body of the first screw is in close contact with the inner wall of the first bearing, and one side of the upper body of the second screw is in close contact with the inner wall of the first bearing. The outer ring of the first bearing is embedded in the first groove of the inner wall of the housing.
[0016] A second bearing, which serves to straighten the first screw and the second screw, is sleeved on the lower rod body of the first screw and the lower rod body of the second screw. One side of the lower rod body of the first screw is in close contact with the inner wall of the second bearing, and one side of the lower rod body of the second screw is in close contact with the inner wall of the second bearing. The outer ring of the second bearing is embedded in the second groove of the inner wall of the housing.
[0017] Preferably, the rotating shaft comprises a first rotating shaft section and a second rotating shaft section in sequence;
[0018] The first section of the rotating shaft has a first flow channel connecting the upper end face of the rotating shaft and the outer side wall of the first section of the rotating shaft, and the first section of the rotating shaft is drivenly connected to the first screw and / or the second screw;
[0019] The moving valve disc and the stationary valve disc are sleeved on the second section of the rotating shaft.
[0020] Preferably, the rotating shaft includes a third rotating shaft located below the second rotating shaft segment;
[0021] The third section of the rotating shaft has a second flow channel connecting the lower end face of the rotating shaft and the outer side wall of the third section of the rotating shaft, and the lower end of the outer side wall of the third section of the rotating shaft is connected to the inner side wall of the fixing frame.
[0022] Preferably, the outer walls of the moving valve disc and the stationary valve disc are close to the inner wall of the housing.
[0023] Preferably, the rotary power generating mechanism includes:
[0024] A second pull rod, at least a portion of which extends into the other end of the channel;
[0025] A vibration drive mechanism is provided between one end of the second pull rod and the fixed frame. The vibration drive mechanism can generate back-and-forth vibration of the second pull rod along the axial direction when the fixed frame rotates.
[0026] Preferably, the vibration drive mechanism includes:
[0027] A vibration generator has at least two positions with a height difference on its end face facing the fixed frame in the circumferential direction, and one end of the vibration generator facing away from the fixed frame is connected to the second tie rod.
[0028] A roller is mounted on the fixed frame. When the fixed frame rotates, the roller moves circumferentially on the end face of the vibration generator facing the fixed frame, so that the vibration generator moves back and forth along the axial direction to generate vibration.
[0029] Preferably, the vibration drive mechanism includes:
[0030] The second elastic element is disposed between the outer wall of the second pull rod and the inner wall of the housing. One end of the second elastic element can abut against the inner wall of the housing, and the other end of the second elastic element can abut against the end of the vibration generator away from the fixed frame, so that the vibration generator has a tendency to move toward the fixed frame.
[0031] Preferably, one end of the second elastic member can abut against the outer side wall of the second pull rod, and the other end of the second elastic member can abut against the inner side wall of the housing.
[0032] Preferably, a third flow channel extending along the axial direction is formed in the middle of the fixing frame and the vibration generating component, and the two ends of the third flow channel are respectively connected to the interior of the second flow channel and the second tie rod.
[0033] Preferably, a sleeve is connected to the outer wall of the end of the first pull rod facing the hydraulic pulse generating mechanism, the outer wall of the sleeve abuts against the inner wall of the housing, and an installation space is formed between the sleeve, the outer wall of the first pull rod, and the inner wall of the housing; the first elastic element is located in the installation space, the upper end of the first elastic element abuts against the inner wall of the housing and the outer wall of the first pull rod, and the lower end of the first elastic element abuts against the inner wall of the housing and the upper end face of the sleeve.
[0034] Preferably, the first screw and / or the second screw are connected to the rotating shaft via a gear structure.
[0035] Preferably, the first pull rod has a first pull rod channel communicating with the channel;
[0036] The radial cross-sectional area of the first tie rod channel changes, or the radial cross-sectional area changes at the transition point from the first tie rod channel to the housing.
[0037] The technical solution of the present invention has the following significant beneficial effects:
[0038] The vibration friction reduction device of this application generates rotational power to the rotary power generating mechanism as the drilling fluid passes through the channel within the casing. This rotation causes the rotary power generating mechanism to rotate, which in turn causes the hydraulic pulse generating mechanism to generate hydraulic pulses on the flowing drilling fluid. Due to the hydraulic pulses in the drilling fluid, the first tie rod vibrates back and forth along its axial direction under the combined action of the hydraulic pulses and the first elastic element. Through this process, the vibration friction reduction device utilizes the pressure of the drilling fluid to generate hydraulic pulses, achieving vibration under the action of these pulses. This effectively improves vibration efficiency and effect, thereby increasing drill bit drilling efficiency, shortening the construction cycle, and reducing drilling costs.
[0039] Specific embodiments of the invention are disclosed in detail below with reference to the description and accompanying drawings, indicating how the principles of the invention can be employed. It should be understood that the embodiments of the invention are not therefore limited in scope. Features described and / or shown for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments. Attached Figure Description
[0040] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, guided by the teachings of this invention, can select various possible shapes and proportions to implement the invention according to specific circumstances.
[0041] Figure 1 This is a cross-sectional view of the vibration friction reduction device in an embodiment of the present invention;
[0042] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.
[0043] The reference numerals in the above figures are as follows:
[0044] 1. First tie rod; 1001. First step; 2. First sealing ring; 3. Top shell; 4. First elastic element; 5. Sleeve; 6. Upper shell; 61. First recess; 7. First bearing; 8. First screw; 9. Second screw; 10. Middle and upper shell; 101. First groove; 102. Second groove; 11. Second bearing; 12. Gear structure; 121. Gear; 13. Conical cylinder; 14. Moving valve disc; 15. Support ring; 16. Stationary valve disc; 17. Middle and lower shell; 18. Rotating shaft; 181. First flow channel; 182. Second flow channel; 19. Fixing frame; 20. Roller; 21. Lower shell; 211. Second step; 22. Vibration generator; 221. Fourth step; 23. Bottom shell; 231. Third step; 232. Second recess; 24. Second elastic element; 25. Second tie rod; 251. Fifth step. Detailed Implementation
[0045] The details of the present invention can be more clearly understood by referring to the accompanying drawings and the description of specific embodiments. However, the specific embodiments of the present invention described herein are for illustrative purposes only and should not be construed as limiting the invention in any way. Under the teachings of this invention, those skilled in the art can conceive of any possible modifications based on the invention, all of which should be considered within the scope of the invention. It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there may be an intervening element. The terms "mounted," "connected," and "connected" should be interpreted broadly, for example, they can refer to mechanical or electrical connections, or internal communication between two elements, and can be direct or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.
[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0047] In order to achieve vibration using hydraulic pulses and thus effectively improve vibration efficiency and effect, this application proposes a vibration friction reduction device. Figure 1 This is a cross-sectional view of the vibration friction reduction device in an embodiment of the present invention. Figure 2 for Figure 1 An enlarged diagram of point A in the middle, as shown below. Figure 1 and Figure 2 As shown, the vibration friction reduction device may include: a housing, in which a channel extending along the axial direction is formed; a rotational power generating mechanism disposed in the channel, which generates rotational power when fluid flows through; a hydraulic pulse generating mechanism disposed in the channel and drivenly connected to the rotational power generating mechanism, which can generate hydraulic pulses on the flowing fluid when rotating; and a first pull rod 1, at least a portion of which extends into one end of the channel and can vibrate back and forth with the housing under the action of the first elastic element 4 and the hydraulic pulses.
[0048] The vibration friction reduction device of this application generates rotational power to the rotary power generating mechanism as the drilling fluid passes through the channel within the casing. This rotation causes the rotary power generating mechanism to rotate, which in turn causes the hydraulic pulse generating mechanism to generate hydraulic pulses on the flowing drilling fluid. Due to the hydraulic pulses in the drilling fluid, the first tie rod 1 vibrates back and forth along its axial direction under the combined action of the hydraulic pulses and the first elastic element 4. Through this process, the vibration friction reduction device utilizes the pressure of the drilling fluid to generate hydraulic pulses, achieving vibration under the action of these pulses. This effectively improves vibration efficiency and effect, thereby increasing the drilling efficiency of the drill bit, shortening the construction cycle, and reducing drilling costs.
[0049] like Figure 1 As shown, in order to enable the hydraulic pulse generating mechanism to generate hydraulic pulses on the flowing fluid, in a feasible embodiment, the hydraulic pulse generating mechanism may include: a rotating shaft 18, which is connected to the rotational power generating mechanism; a moving valve disc 14 and a stationary valve disc 16 sleeved on the rotating shaft 18. The moving valve disc 14 is fixedly connected to the rotating shaft 18, and the stationary valve disc 16 can rotate relative to the rotating shaft 18. The stationary valve disc 16 has a first flow channel 181 hole extending along the axial direction, and the moving valve disc 14 has a second flow channel 182 hole extending along the axial direction. Fluid input from one end of the channel can flow through the first flow channel 181 hole and the second flow channel 182 hole and then be output from the other end of the channel.
[0050] For example, the second flow channel 182 holes of the moving valve disc 14 can be evenly distributed in the circumferential direction, and there can be multiple holes, such as 3 to 6. The second flow channel 182 holes of the moving valve disc 14 can also be distributed within a certain circumferential angle range, for example, the second flow channel 182 holes can be distributed in the radial direction, with increasing or decreasing distribution, or in the circumferential direction with increasing or decreasing distribution. The distribution structure of the first flow channel 181 holes of the stationary valve disc 16 can adopt the same structure as the second flow channel 182 holes of the first moving valve disc 14. To prevent fluid from being unable to pass through when the moving valve disc 14 and the stationary valve disc 16 are close together and the first flow channel 181 hole and the second flow channel 182 hole are misaligned, or when the structures of the first flow channel 181 hole and the second flow channel 182 hole are exactly the same, fluid can only pass through at the moment when the stationary valve disc 16 rotates to align the first flow channel 181 hole with the second flow channel 182 hole of the moving valve disc 14. A support ring 15 is provided between the moving valve disc 14 and the stationary valve disc 16. The support ring 15 creates a gap between the moving valve disc 14 and the stationary valve disc 16. The support ring 15 is sleeved on the rotating shaft 18.
[0051] As the moving valve disc 14 rotates with the rotating shaft 18, the stationary valve disc 16 remains relatively stationary. The second flow channel 182 hole of the moving valve disc 14 and the first flow channel 181 hole of the moving valve disc 14 will sometimes align and sometimes deviate, thereby changing the path and flow area of the fluid, which in turn generates hydraulic pulses in the fluid.
[0052] like Figure 1 As shown, the first tie rod 1 may have a first tie rod 1 channel communicating with the channel. The radial cross-sectional area of the first tie rod 1 channel varies, or the radial cross-sectional area changes at the transition point of the first tie rod 1 channel to the channel of the housing. When the fluid generates a hydraulic pulse, since the fluid also flows through the first tie rod 1 channel, the first tie rod 1 will vibrate back and forth under the action of the first elastic element 4 and the hydraulic pulse.
[0053] As a feasible option, such as Figure 1 As shown, the outer walls of the moving valve disc 14 and the stationary valve disc 16 are close to the inner wall of the housing, thereby preventing fluid from flowing through the gap between the outer walls of the moving valve disc 14 and the stationary valve disc 16 and the inner wall of the housing, and instead of flowing through the first flow channel 181 hole and the second flow channel 182 hole, which can improve the intensity of the hydraulic pulse.
[0054] In order to enable the rotary power generating mechanism to generate rotational power when fluid flows through it, as a feasible method is... Figure 1 As shown, the rotary power generating mechanism may include: a first screw 8 and a second screw 9 disposed in the channel. The first screw 8 and the second screw 9 mesh with each other, forming a spiral sealing line and a sealing cavity through the lead difference. When the first screw 8 and the second screw 9 rotate, the sealing cavity moves along the axial direction to convert the pressure energy of the fluid into the mechanical energy of the first screw 8 and the second screw 9. The first screw 8 and / or the second screw 9 are drively connected to the rotating shaft 18. For example, as... Figure 2 As shown, the first screw 8 and / or the second screw 9 are connected to the rotating shaft 18 through the gear structure 12.
[0055] To limit the first screw 8 and the second screw 9 in both the axial and radial directions and prevent them from wobbling, such as... Figure 1 As shown, the vibration friction reduction device may include: a first bearing 7, which serves a straightening function, sleeved on the upper rod of the first screw 8 and the upper rod of the second screw 9, with one side of the upper rod of the first screw 8 in close contact with the inner wall of the first bearing 7, and one side of the upper rod of the second screw 9 in close contact with the inner wall of the first bearing 7; the outer ring of the first bearing 7 is embedded in a first groove 101 on the inner wall of the housing; and a second bearing 11, which serves a straightening function, sleeved on the lower rod of the first screw 8 and the lower rod of the second screw 9, with one side of the lower rod of the first screw 8 in close contact with the inner wall of the second bearing 11, and one side of the lower rod of the second screw 9 in close contact with the inner wall of the second bearing 11; the outer ring of the second bearing 11 is embedded in a second groove 102 on the inner wall of the housing.
[0056] At the inner sidewalls of the housing corresponding to the first screw 8 and the second screw 9, the shape of the inner sidewall matches the outer sidewall of the first screw 8 and the second screw 9 to prevent excessive leakage of fluid from the gaps between the first screw 8, the second screw 9 and the housing.
[0057] like Figure 1 As shown, the rotating shaft 18 may sequentially include a first section of rotating shaft 18 and a second section of rotating shaft 18. The first section of rotating shaft 18 is located above the second section of rotating shaft 18. The first section of rotating shaft 18 has a first flow channel 181 connecting the upper end face of rotating shaft 18 and the outer side wall of the first section of rotating shaft 18. The first section of rotating shaft 18 is drive-connected to the first screw 8 and / or the second screw 9. A moving valve disc 14 and a stationary valve disc 16 are sleeved on the second section of rotating shaft 18. The first section of rotating shaft 18 extends between the lower rod of the first screw 8 and the lower rod of the second screw 9, so that the inlet of the first flow channel 181 can communicate with the sealed cavity formed by the first screw 8 and the second screw 9 to receive the fluid output from the sealed cavity. The first section of rotating shaft 18 is drive-connected to the first screw 8 and / or the second screw 9 through a gear structure 12. Gears 121 can be installed on the outside of the first section of the rotating shaft 18. Gears 121 can also be installed on the lower rod of the first screw 8 and / or the lower rod of the second screw 9. The gears 121 on the outside of the first section of the rotating shaft 18 can mesh with the gears 121 on the lower rod of the first screw 8 and / or the lower rod of the second screw 9. After flowing through the first flow channel 181 hole and the second flow channel 182 hole, the fluid reaches the outer side wall of the first section of the rotating shaft 18, and then continues to flow downward through the first flow channel 181 hole and the second flow channel 182 hole on the moving valve disc 14 and the stationary valve disc 16.
[0058] To prevent the fluid flowing through the first flow channel 181 and the second flow channel 182 from flowing downwards between the outer wall of the rotating shaft 18 and the inner wall of the housing, so that the lower end of the rotating shaft 18 can be connected to other components via a threaded connection, such as... Figure 1 As shown, the rotating shaft 18 may include a third rotating shaft 18 located below the second rotating shaft 18. The third rotating shaft 18 has a second flow channel 182 connecting the lower end face of the rotating shaft 18 and the outer side wall of the third rotating shaft 18. The lower end of the outer side wall of the third rotating shaft 18 is connected to the inner side wall of the fixing frame 19. In this manner, the fluid that flows through the first flow channel 181 hole and the second flow channel 182 hole can flow into the second flow channel 182 and then flow out from the middle of the lower end face of the rotating shaft 18, thereby flowing into the third flow channel formed inside other components (fixing frame 19, etc.) connected to the lower end of the rotating shaft 18 by means of a threaded connection, and continue to flow downward.
[0059] To enable the vibration friction reduction device to generate bidirectional vibration, thereby further improving the friction reduction effect, such as... Figure 1As shown, the rotational power generating mechanism may include: a second pull rod 25, at least a portion of which extends into the other end of the channel; and a vibration driving mechanism disposed between one end of the second pull rod 25 and the fixed frame 19, the vibration driving mechanism being able to generate back-and-forth vibration of the second pull rod 25 along the axial direction when the fixed frame 19 rotates.
[0060] As a feasible option, such as Figure 1 As shown, the vibration drive mechanism may include: a vibration generator 22, the end face of the vibration generator 22 facing the fixed frame 19 having at least two positions with a height difference in the circumferential direction, and the end of the vibration generator 22 facing away from the fixed frame 19 being connected to a second tie rod 25; and a roller 20, mounted on the fixed frame 19, which moves circumferentially on the end face of the vibration generator 22 facing the fixed frame 19 when the fixed frame 19 rotates, so that the vibration generator 22 moves back and forth in the axial direction to generate vibration. For example, the height difference between the two positions with a height difference can be between 15mm and 20mm, and the transition between the two positions with a height difference can be achieved through a smooth curved trajectory.
[0061] Furthermore, there can be two rollers 20, which are symmetrically arranged on the lower end face of the fixed frame 19 about the rotation axis of the lower end face of the fixed frame 19. At least two positions with height differences on the end face of the vibration generator 22 facing the fixed frame 19 in the circumferential direction are also symmetrically arranged about the axis of the vibration generator 22. This ensures that the height of the positions where the two rollers 20 press against the end face of the vibration generator 22 facing the fixed frame 19 is the same when the rollers 20 move circumferentially, thus ensuring the stability of the fit between the fixed frame 19 and the vibration generator 22. As the rollers 20 move circumferentially, the distance between the fixed frame 19 and the vibration generator 22 repeatedly increases or decreases, causing the vibration generator 22 to move back and forth along the axial direction to generate vibration.
[0062] To ensure the effectiveness of the vibration generated by the reciprocating movement of the vibration generator 22 along the axial direction, such as Figure 1 As shown, the vibration drive mechanism may include a second elastic element 24, which is disposed between the outer side wall of the second pull rod 25 and the inner side wall of the housing. One end of the second elastic element 24 can abut against the inner side wall of the housing, and the other end of the second elastic element 24 can abut against the end of the vibration generator 22 away from the fixed frame 19, so that the vibration generator 22 has a tendency to move toward the fixed frame 19, thereby ensuring that the roller 20 is always in close contact with the end face of the vibration generator 22 facing the fixed frame 19.
[0063] Furthermore, when the vibration generator 22 and the second pull rod 25 move upward to their maximum amplitude during vibration, one end of the second elastic member 24 can abut against the outer side wall of the second pull rod 25, and the other end of the second elastic member 24 can abut against the inner side wall of the housing, thereby utilizing the second elastic member 24 to achieve a certain buffering effect.
[0064] As an option, the first elastic element 4 and the second elastic element 24 can be disc springs, with the first elastic element 4 sleeved outside the first pull rod 1 and the second elastic element 24 sleeved outside the second pull rod 25.
[0065] As a feasible option, such as Figure 1 As shown, a third flow channel extending along the axial direction is formed in the middle of the fixed frame 19 and the vibration generating element 22. The two ends of the third flow channel are respectively connected to the interior of the second flow channel 182 and the second tie rod 25. In this way, the fluid output from the second flow channel 182 of the rotating shaft 18 can flow into the interior of the second tie rod 25 after passing through the fixed frame 19 and the vibration generating element 22. The outer wall of the fixed frame 19, the outer wall of the vibration generating element 22, and part of the outer wall of the second tie rod 25 are basically in close contact with the inner wall of the housing, thereby preventing fluid leakage.
[0066] To improve the sealing effect, such as Figure 1 As shown, a first sealing ring is provided between the outer wall of the first pull rod 1 and the inner wall of the housing. A second sealing ring is provided between the outer wall of the second pull rod 25 and the inner wall of the housing. A first sealing groove may be formed on the inner wall of the housing, and the first sealing ring is disposed in the first sealing groove. A second sealing groove may be formed on the inner wall of the housing, and the second sealing ring is disposed in the second sealing groove. Multiple first and second sealing rings can be provided, arranged vertically to further improve the sealing effect.
[0067] like Figure 1 As shown, a sleeve 5 is connected to the outer wall of the end of the first pull rod 1 facing the hydraulic pulse generating mechanism. The outer wall of the sleeve 5 is in contact with the inner wall of the housing. An installation space is formed between the sleeve 5, the outer wall of the first pull rod 1, and the inner wall of the housing. The first elastic element 4 is located in the installation space. The upper end of the first elastic element 4 abuts against the inner wall of the housing and the outer wall of the first pull rod 1, and the lower end of the first elastic element 4 abuts against the inner wall of the housing and the upper end face of the sleeve 5. In this way, the first elastic element 4 can also play a certain role in buffering the vibration generated by the back-and-forth movement of the first pull rod 1, avoiding a hard impact between the first pull rod 1 and the housing.
[0068] As a feasible option, all components of the vibration friction reduction device in this application can be made of all-metal materials, which can give the vibration friction reduction device high temperature resistance, thereby improving the service life and operational reliability of the vibration friction reduction device.
[0069] To facilitate the installation of components such as the rotational power generating mechanism, hydraulic pulse generating mechanism, vibration generating component 22, fixing frame 19, first elastic component 4, second elastic component 24, first bearing 7, second bearing 11, and sleeve 5 into the housing, and to achieve certain axial limiting of the above components, the housing can be composed of multiple parts connected by threaded connections.
[0070] As a feasible option, such as Figure 1 As shown, the housing may include a top housing 3 and an upper housing 6. The top housing 3 is located above the upper housing 6. The connection between the top housing 3 and the upper housing 6 may form an annular first recess 61 on the inner wall of the housing. The first recess 61 has a first step 1001 corresponding to the first pull rod 1. The first recess 61 can form at least a partial installation space. The upper end of the first elastic member 4 abuts against the inner wall of the housing (the upper end of the first recess 61) and the outer wall of the first pull rod 1 (the first step 1001). The lower end of the first elastic member 4 abuts against the inner wall of the housing (the lower end of the first recess 61) and the upper end face of the sleeve 5.
[0071] As a feasible option, such as Figure 1 As shown, the housing may include an upper housing 10, with an upper housing 6 located above the upper housing 10. The connection between the upper housing 6 and the upper housing 10 may form an annular first groove 101 on the inner sidewall of the housing, thereby facilitating the installation and embedding of the outer ring of the first bearing 7 into the first groove 101.
[0072] As a feasible option, such as Figure 1 As shown, the housing may include a lower housing 17, which is located below the upper housing 10. A second annular groove 102 can be formed on the inner wall of the housing at the connection between the lower housing 17 and the upper housing 10, facilitating the installation and embedding of the outer ring of the second bearing 11 into the second groove 102. To reduce the number of second bearings 11, a tapered cylinder 13 can be sleeved on the lower body of the first screw 8 and the lower body of the second screw 9. The tapered cylinder 13 is located below the second bearing 11, with the outer diameter of the upper end face of the tapered cylinder 13 being smaller than the outer diameter of the lower end face. The upper end face of the tapered cylinder 13 abuts against the inner ring of the second bearing 11, the lower end face of the tapered cylinder 13 abuts against the lower end of the second groove 102, and the outer ring of the second bearing 11 abuts against the upper end of the second groove 102.
[0073] As a feasible option, such as Figure 1 As shown, the housing may include a lower housing 21, which is located below the middle lower housing 17. A second step 211 may be formed on the inner wall of the housing at the connection between the lower housing 21 and the middle lower housing 17. The inner diameter of the lower housing 21 is larger than the inner diameter of the middle lower housing 17. The upper end face of the fixing bracket 19 abuts against the second step 211.
[0074] As a feasible option, such as Figure 1 As shown, the housing may include a bottom housing 23, which is located below the lower housing 21. A third step 231 may be formed on the inner wall of the bottom housing 23 at the connection between the bottom housing 23 and the lower housing 21. The upper inner diameter of the inner wall of the bottom housing 23 is smaller than the inner diameter of the inner wall of the lower housing 21. The outer wall of the vibration generator 22 has a fourth step 221, and the third step 231 abuts against the fourth step 221.
[0075] Furthermore, such as Figure 1 As shown, the inner wall of the bottom housing 23 has a second recess 232, and the outer wall of the second pull rod 25 has a fifth step 251. One end of the second elastic member 24 can abut against the inner wall of the housing (the lower end of the second recess 232), and the other end of the second elastic member 24 can abut against the end of the vibration generating member 22 away from the fixing frame 19. One end of the second elastic member 24 can abut against the outer wall of the second pull rod 25 (the fifth step 251), and the other end of the second elastic member 24 can abut against the inner wall of the housing (the upper end of the second recess 232).
[0076] The working process of the vibration friction reduction device in this application is as follows: the drilling fluid enters the sealed cavity formed by the lead difference between the first screw 8 and the second screw 9 through the interior of the first tie rod 1. As the first screw 8 and the second screw 9 rotate, the sealed cavity moves axially. When the sealed cavity reaches the lower end of the first screw 8 and the second screw 9, the drilling fluid enters the first flow channel 181 of the first section of the rotating shaft 18, and then flows out through the outer wall of the first section of the rotating shaft 18. The drilling fluid continues to flow downward through the second flow channel 182 hole of the moving valve disc 14 and the first flow channel 181 hole of the stationary valve disc 16, and then flows into the second flow channel 182 from the outer wall of the third section of the rotating shaft 18 and flows out from the lower end face of the rotating shaft 18. Then it flows into the third flow channel of the roller 20 and the vibration generating element 22, and finally flows out from the interior of the second tie rod 25. When drilling fluid passes through the helical flow channel formed by the meshing of the first screw 8 and the second screw 9, the first screw 8 and the second screw 9 will rotate. The first screw 8 and the second screw 9 drive the gear 121 to rotate, transmitting the rotational motion to the rotating shaft 18. The rotating shaft 18 then transmits the rotational motion to the moving valve disc 14 and the fixed frame 19 with rollers 20. The stationary valve disc 16 is fixed. The rotation of the moving valve disc 14 will cause the flow area to change, thereby generating hydraulic pulses. Under the action of the hydraulic pulses, the first tie rod 1 will generate axial vibration. The first elastic element 4 will reset the first tie rod 1 from its extreme position. The fixed frame 19 of the rollers 20 will rotate, causing the rollers 20 to roll circumferentially at at least two positions with height differences on the upper end face of the vibration generator 22. Due to the height difference on the upper end face of the vibration generator 22, the vibration generator 22 moves the second tie rod 25 back and forth to generate vibration by moving up and down. The second elastic element 24 will reset the second tie rod 25 from its extreme position.
[0077] The vibration friction reduction device in this application can be made of all-metal materials, avoiding the problem of rubber parts failing at high temperatures. Its overall structure is short, ensuring good insertion capability. Furthermore, the power unit adopts a reliable twin-screw structure, utilizing hydraulic pulse and mechanical coupling to achieve bidirectional vibration, improving tool vibration intensity, efficiency, and effectiveness. This effectively improves drilling pressure, increases drilling efficiency, shortens the construction cycle, and reduces drilling costs. Its compact internal structure, large diameter, and reliable power unit structure make it suitable for a wide range of applications. It effectively improves vibration efficiency and effectiveness.
[0078] All articles and references disclosed herein, including patent applications and publications, are incorporated herein by reference for various purposes. The term “substantially constitutes…” used to describe a combination should include the identified element, component, part, or step, as well as other elements, components, parts, or steps that do not substantially affect the essential novelty of the combination. The use of the terms “comprising” or “including” to describe combinations of elements, components, parts, or steps herein also contemplates embodiments substantially constituted by such elements, components, parts, or steps. The use of the term “may” herein is intended to indicate that any described attribute “may” include is optional. Multiple elements, components, parts, or steps can be provided by a single integrated element, component, part, or step. Alternatively, a single integrated element, component, part, or step can be divided into multiple separate elements, components, parts, or steps. The disclosure of “a” or “an” used to describe an element, component, part, or step does not imply exclusion of other elements, components, parts, or steps.
[0079] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the scope of protection of the present invention.
Claims
1. A vibration friction reduction device, characterized in that, The vibration friction reduction device includes: A housing, wherein a channel extending along an axial direction is formed within the housing; A rotary power generating mechanism is installed in the channel, which generates rotational power when the fluid flows through it; A hydraulic pulse generating mechanism is installed in the channel and is drivenly connected to the rotary power generating mechanism. The hydraulic pulse generating mechanism can generate hydraulic pulses on the flowing fluid when it rotates. The first pull rod, at least a portion of which extends into one end of the channel, is capable of reciprocating with the housing under the action of the first elastic element and the hydraulic pulse.
2. The vibration friction reduction device according to claim 1, characterized in that, The hydraulic pulse generating mechanism includes: a rotating shaft, which is connected to the rotating power generating mechanism; a moving valve disc and a stationary valve disc sleeved on the rotating shaft; the moving valve disc is fixedly connected to the rotating shaft; the stationary valve disc can rotate relative to the rotating shaft; the stationary valve disc has a first flow channel hole extending along the axial direction; the moving valve disc has a second flow channel hole extending along the axial direction; fluid input from one end of the channel can flow through the first flow channel hole and the second flow channel hole and then be output from the other end of the channel.
3. The vibration friction reduction device according to claim 2, characterized in that, The rotary power generating mechanism includes: A first screw and a second screw are installed in the channel. The first screw and the second screw mesh with each other and form a spiral sealing line and a sealing cavity through the lead difference. When the first screw and the second screw rotate, the sealing cavity moves along the axial direction to convert the pressure energy of the fluid into the mechanical energy of the first screw and the second screw. The first screw and / or the second screw are connected to the rotating shaft for transmission.
4. The vibration friction reduction device according to claim 3, characterized in that, The vibration friction reduction device includes: A first bearing, which serves to straighten, is sleeved on the upper body of the first screw and the upper body of the second screw. One side of the upper body of the first screw is in close contact with the inner wall of the first bearing, and one side of the upper body of the second screw is in close contact with the inner wall of the first bearing. The outer ring of the first bearing is embedded in the first groove of the inner wall of the housing. A second bearing, which serves to straighten the first screw and the second screw, is sleeved on the lower rod body of the first screw and the lower rod body of the second screw. One side of the lower rod body of the first screw is in close contact with the inner wall of the second bearing, and one side of the lower rod body of the second screw is in close contact with the inner wall of the second bearing. The outer ring of the second bearing is embedded in the second groove of the inner wall of the housing.
5. The vibration friction reduction device according to claim 3, characterized in that, The rotating shaft comprises a first rotating shaft section and a second rotating shaft section in sequence; The first section of the rotating shaft has a first flow channel connecting the upper end face of the rotating shaft and the outer side wall of the first section of the rotating shaft, and the first section of the rotating shaft is drivenly connected to the first screw and / or the second screw; The moving valve disc and the stationary valve disc are sleeved on the second section of the rotating shaft.
6. The vibration friction reduction device according to claim 5, characterized in that, The rotating shaft includes a third rotating shaft located below the second rotating shaft; The third section of the rotating shaft has a second flow channel connecting the lower end face of the rotating shaft and the outer side wall of the third section of the rotating shaft, and the lower end of the outer side wall of the third section of the rotating shaft is connected to the inner side wall of the fixing frame.
7. The vibration friction reduction device according to claim 2, characterized in that, The outer walls of the moving valve disc and the stationary valve disc are close to the inner wall of the housing.
8. The vibration friction reduction device according to claim 6, characterized in that, The rotary power generating mechanism includes: A second pull rod, at least a portion of which extends into the other end of the channel; A vibration drive mechanism is provided between one end of the second pull rod and the fixed frame. The vibration drive mechanism can generate back-and-forth vibration of the second pull rod along the axial direction when the fixed frame rotates.
9. The vibration friction reduction device according to claim 8, characterized in that, The vibration driving mechanism includes: A vibration generator has at least two positions with a height difference on its end face facing the fixed frame in the circumferential direction, and one end of the vibration generator facing away from the fixed frame is connected to the second tie rod. A roller is mounted on the fixed frame. When the fixed frame rotates, the roller moves circumferentially on the end face of the vibration generator facing the fixed frame, so that the vibration generator moves back and forth along the axial direction to generate vibration.
10. The vibration friction reduction device according to claim 9, characterized in that, The vibration driving mechanism includes: The second elastic element is disposed between the outer wall of the second pull rod and the inner wall of the housing. One end of the second elastic element can abut against the inner wall of the housing, and the other end of the second elastic element can abut against the end of the vibration generator away from the fixed frame, so that the vibration generator has a tendency to move toward the fixed frame.
11. The vibration friction reduction device according to claim 10, characterized in that, One end of the second elastic element can abut against the outer side wall of the second pull rod, and the other end of the second elastic element can abut against the inner side wall of the housing.
12. The vibration friction reduction device according to claim 9, characterized in that, The fixing frame and the vibration generating component have a third flow channel extending along the axial direction in the middle, and the two ends of the third flow channel are respectively connected to the interior of the second flow channel and the second tie rod.
13. The vibration friction reduction device according to claim 1, characterized in that, A sleeve is connected to the outer wall of the end of the first pull rod facing the hydraulic pulse generating mechanism. The outer wall of the sleeve abuts against the inner wall of the housing, and an installation space is formed between the sleeve, the outer wall of the first pull rod, and the inner wall of the housing. The first elastic element is located in the installation space. The upper end of the first elastic element abuts against the inner wall of the housing and the outer wall of the first pull rod, and the lower end of the first elastic element abuts against the inner wall of the housing and the upper end face of the sleeve.
14. The vibration friction reduction device according to claim 3, characterized in that, The first screw and / or the second screw are connected to the rotating shaft via a gear structure.
15. The vibration friction reduction device according to claim 1, characterized in that, The first pull rod has a first pull rod channel communicating with the channel; The radial cross-sectional area of the first tie rod channel changes, or the radial cross-sectional area changes at the transition point from the first tie rod channel to the housing.