Multi-functional rotary-vibration down-the-hole power tool

Abstract

The application discloses a multifunctional rotary vibration downhole casing power tool, which comprises a hollow shell, a joint sealingly connected to a first end of the shell, an eccentric head telescopically and rotatably arranged at a second end of the shell, a flow channel hole arranged on the eccentric head, and a cutting structure arranged on the surface of the eccentric head, a double-frequency vibration driving module comprising a low-frequency hydraulic pulse mechanism and a high-frequency hydraulic pulse mechanism, a first path of hydraulic pulses generated by the low-frequency hydraulic pulse mechanism and a second path of hydraulic pulses generated by the high-frequency hydraulic pulse mechanism being superposed to form double-frequency vibration, and a telescopic reset module comprising a piston located between the eccentric head and the shell and a reset member located between the piston, the eccentric head and the shell. The application can realize comprehensive functions such as guiding, flow guiding, well wall trimming and casing pulling, and can improve the casing / tail pipe running efficiency and success rate under complex well conditions.

Description

Technical Field

[0001] This invention relates to the field of casing / tailpipe installation technology in oil and gas extraction, and particularly to a multifunctional rotary vibratory casing installation power tool. Background Technology

[0002] In oil and gas extraction, casing / tailpipe running is a crucial step in the drilling and completion process, and its quality and efficiency directly affect subsequent cementing quality and reservoir development outcomes. As global oil and gas resource development continues to advance into deeper, ultra-deep, offshore, and unconventional reservoirs, drilling engineering places higher demands on well types. Special well types such as extended reach wells, 3D wells, deep and complex wells, and ultra-long horizontal sections are widely used to adapt to the development needs of different types of oil and gas reservoirs. However, these special well types generally present inherent challenges such as large well depths, complex wellbore trajectories, irregular well diameters, small wellbore sizes, and high frictional torque, posing significant challenges to casing / tailpipe running operations.

[0003] In existing casing / tailpipe running technologies, the commonly used top-drive casing running method has significant limitations. Due to excessive friction during casing / tailpipe running and difficulty in handling wellbore instability, situations often arise where the casing / tailpipe fails to reach the correct position or even gets stuck, severely impacting drilling efficiency and safety. Against this backdrop, casing running power tools, as key equipment for solving the challenges of running casing / tailpipe in complex well types such as ultra-long horizontal sections, are becoming increasingly important. These tools are typically installed at the lower end of the casing string, and their core function is to guide the casing string through the center of the wellbore, ensuring smooth running operations.

[0004] However, the mainstream casing running power tools currently on the market (typically represented by traditional rotary guide shoes) still have many technical shortcomings: First, insufficient guidance function. Most existing guide shoes adopt a fixed structure design, and the guidance angle and direction cannot be dynamically adjusted according to the real-time changes in the wellbore trajectory, making it difficult to adapt to complex and ever-changing wellbore environments. Second, limited flow performance. The internal flow channel design of traditional guide shoes is relatively simple, only meeting the basic drilling fluid flow requirements. When encountering cuttings beds that are easily formed in ultra-long horizontal sections, they cannot form a strong scouring and cuttings carrying effect, which easily leads to the accumulation of cuttings at the front end of the guide shoe and around the casing, further increasing the running resistance. Third, weak wellbore trimming capability. The scraping and cutting components of conventional guide shoes have limited performance, making it difficult to trim the wellbore to a regular shape and size that meets the requirements for casing running, and failing to provide good wellbore conditions for casing / tailpipe running.

[0005] In summary, the limited functionality of existing casing running power tools makes it difficult to meet the requirements for casing / tailpipe running under complex well conditions. Therefore, it is necessary to propose a multi-functional rotary vibratory casing running power tool to solve at least one of the aforementioned problems.

[0006] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this application and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this application. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a multifunctional rotary vibration casing lowering power tool. By integrating dual-frequency vibration drive, telescopic reset, guidance, and wellbore trimming structures, it achieves comprehensive functions such as guidance, flow diversion, wellbore trimming, and casing traction, thereby improving the efficiency and success rate of casing / tailpipe lowering under complex well conditions.

[0008] The specific technical solution of the embodiments of the present invention is as follows:

[0009] A multifunctional rotary vibratory downsleeving power tool includes: a housing, which is a hollow tubular structure having a first end and a second end opposite to each other; a connector, which is sealed to the first end of the housing; an eccentric head, which is telescopically and rotatably disposed at the second end of the housing, having an eccentric structure and a flow channel hole, and having a cutting structure on its surface; a dual-frequency vibration drive module, including a low-frequency hydraulic pulse mechanism and a high-frequency hydraulic pulse mechanism, wherein the low-frequency hydraulic pulse mechanism generates a first hydraulic pulse with a first frequency, and the high-frequency hydraulic pulse mechanism generates a second hydraulic pulse with a second frequency; the first frequency is less than the second frequency; the first hydraulic pulse generated by the low-frequency hydraulic pulse mechanism and the second hydraulic pulse generated by the high-frequency hydraulic pulse mechanism are superimposed to form dual-frequency vibration; and a telescopic reset module, including a piston located between the eccentric head and the housing, and a reset member located between the piston, the eccentric head, and the housing.

[0010] In a preferred embodiment, the portion of the eccentric head located outside the housing is a streamlined surface, and the streamlined surface is provided with reamer ribs for well wall trimming. The cutting structure includes cutting teeth arranged on the reamer ribs, which are used to scrape the rock wall, remove rock cuttings, and enlarge the borehole.

[0011] In a preferred embodiment, the eccentric head has a central channel for receiving drilling fluid in its middle part. The central channel is connected to the flow channel hole. One end of the flow channel hole is connected to the end of the central channel hole, and the other end extends to the outer surface of the eccentric head. The flow channel hole is inclined. When the fluid flows through the central channel hole and out of the eccentric head through the flow channel hole, the fluid reaction force drives the eccentric head to rotate. The centrifugal force generated by the rotation of the eccentric head keeps the eccentric head near the central axis of the wellbore. At the same time, the rotating cutting teeth simultaneously complete the scraping of the rock wall, the cleaning of rock cuttings, and the enlargement of the hole.

[0012] In a preferred embodiment, the reamer ribs are evenly distributed along the circumference of the eccentric head, and the number of reamer ribs is between 3 and 6. The extension direction of the reamer ribs forms a helical angle of 15° to 45° with the axis of the eccentric head. The number of flow channel holes is between 1 and 3. When the number of flow channel holes is greater than 1, the multiple flow channel holes are evenly spaced along the circumference.

[0013] In a preferred embodiment, the piston is sealed within the housing, the eccentric head has an external thread on the outer side of one end of the housing, the piston has an internal thread on the inner side, the eccentric head and the piston are threadedly connected, the eccentric head has a reduced diameter section on the side near the piston, the reset member is sleeved outside the reduced diameter section of the eccentric head, one end of the reset member abuts against the piston, and the other end abuts against the reduced diameter step of the eccentric head.

[0014] In a preferred embodiment, the eccentric head includes an exposed portion located outside the reduced diameter section and the housing, and an intermediate section located between the reduced diameter section and the exposed portion. The outer side wall of the intermediate section and the inner side wall of the housing are respectively provided with grooves for installing balls. When the eccentric head extends along the axial direction of the housing, the grooves of the intermediate section are directly opposite the grooves of the housing.

[0015] In a preferred embodiment, the groove includes multiple sets, which are spaced apart along the axial direction. The housing has a mounting hole for each set of grooves that communicates with the groove. The ball is inserted into the groove through the mounting hole, and a screw plug is provided in the mounting hole.

[0016] In a preferred embodiment, the high-frequency hydraulic pulse mechanism includes a turbine assembly, a turbine shaft, a moving valve, and a fixed valve. The moving valve and the fixed valve are each provided with at least one flow-through orifice to adjust the pulse. The turbine assembly transmits power, and the turbine shaft is coaxially mounted inside the turbine assembly. The moving valve is connected to one end of the turbine shaft. The turbine shaft has a hollow tubular structure. When drilling fluid flows through the high-frequency hydraulic pulse mechanism, it drives the turbine assembly to rotate. The turbine assembly drives the turbine shaft to rotate synchronously, which in turn drives the moving valve to rotate. The fixed valve is fixedly installed inside the housing. The rotation of the moving valve enables the periodic opening and closing of the flow-through orifice, changing the flow area to generate high-frequency hydraulic pulses.

[0017] In a preferred embodiment, the eccentric head has a central channel for receiving drilling fluid in its middle part, the central channel being connected to the flow channel hole, a clamping member is provided at the opening of the turbine shaft opposite to the moving valve, the piston has a through hole in its middle part that mates with the central channel, one end of the clamping member is blocked at the opening of the turbine shaft, and when the reset member is reset, the other end of the clamping member can extend into the through hole of the piston.

[0018] In a preferred embodiment, the flow passages on the moving valve and the fixed valve are fan-shaped or arc-shaped, and the number of flow passages is one to three. The pulse frequency generated by the periodic opening and closing of the moving valve and the fixed valve is greater than 20 Hz.

[0019] In a preferred embodiment, the low-frequency hydraulic pulse mechanism includes an oscillating subsection passing through the housing. One end of the oscillating subsection abuts against a connector, and the other end of the oscillating subsection abuts against a fixed valve via a central ring. The oscillating subsection includes a subsection body passing through the housing. A flow chamber is provided within the subsection body. The flow chamber includes a liquid inlet, an upper turbulence hole, a lower turbulence hole, an upper diversion channel, a lower diversion channel, and a liquid outlet. Along the main flow direction of the fluid, the liquid inlet, the upper turbulence hole, the lower turbulence hole, and the liquid outlet are arranged sequentially. One end of the upper diversion channel is connected to the transition position between the upper turbulence hole and the lower turbulence hole, and the other end of the upper diversion hole is connected to the transition position between the lower turbulence hole and the liquid outlet. One section of the lower diversion channel is located at the transition position between the lower turbulence hole and the liquid outlet, and the other end radially penetrates the subsection body.

[0020] In a preferred embodiment, the inlet hole is an axially extending cylindrical hole. Along the fluid flow direction, the upper turbulence hole is a tapered hole with a gradually decreasing flow cross-section, the lower turbulence hole is a tapered hole with a gradually increasing flow cross-section, the outlet hole is an axially extending cylindrical hole, the diameter of the outlet hole is smaller than the diameter of the inlet hole, and the upper diversion channel is a plurality of bypass channels surrounding the lower turbulence hole.

[0021] In a preferred embodiment, the pulse frequency of the low-frequency hydraulic pulse mechanism is greater than 10 Hz, and the pulse frequency of the dual-frequency vibration drive module is greater than 30 Hz.

[0022] The technical solution of the present invention has the following significant beneficial effects:

[0023] The multifunctional rotary vibratory casing running power tool provided in this application embodiment achieves dual-frequency vibration through a dual-frequency vibration drive module, enabling pulse frequencies greater than 30Hz. This dual-frequency vibration makes the casing running process smoother, significantly improving running efficiency, greatly shortening operation time, and reducing non-productive time costs. Simultaneously, the retractable eccentric head structure integrates rotation and vibration functions. When encountering sudden changes in wellbore trajectory or irregular areas, the retractable eccentric head can adjust its position in real time, guiding the casing along the optimal path, avoiding excessive collision or wear with the wellbore, ensuring the safety and stability of casing running, effectively reducing the risk of casing damage, and improving casing service life and running success rate.

[0024] In terms of wellbore trimming, the eccentric head cutting structure, combined with the dual-frequency vibration function of this invention, can trim irregular parts of the wellbore in real time, improving wellbore quality. Especially in deep wells and horizontal wells with long horizontal sections requiring extensive reach, it can effectively avoid difficulties in casing installation and stuck pipe accidents caused by wellbore irregularities, ensuring smooth operation.

[0025] Through the synergistic functions of guidance, diversion, and wellbore trimming, the casing / tailpipe is facilitated to be accurately run along the designed trajectory during the running of casing / tailpipe in ultra-long horizontal well sections. This improves the centering of the casing / tailpipe, reduces running risks, and increases the success rate of running casing / tailpipe. At the same time, it creates favorable conditions for subsequent cementing operations, which is conducive to improving cementing quality.

[0026] 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

[0027] 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.

[0028] Figure 1 This is a schematic diagram of the structure of a multifunctional rotary vibratory sleeve power tool provided in the embodiments of this application;

[0029] Figure 2 This is a schematic diagram of the structure of an eccentric head of a multifunctional rotary vibrating sleeve power tool provided in the embodiments of this application;

[0030] Figure 3 This is a three-dimensional schematic diagram of the eccentric head of a multifunctional rotary vibratory sleeve power tool provided in the embodiments of this application;

[0031] Figure 4 A three-dimensional schematic diagram of a sector-shaped actuated valve provided in the embodiments of this application;

[0032] Figure 5 A three-dimensional schematic diagram of an arc-shaped moving valve provided in the embodiments of this application;

[0033] Figure 6 This is a schematic diagram of the structure of a multifunctional rotary vibrating sleeve power tool oscillation short section provided in the embodiments of this application;

[0034] Figure 7 This is a schematic diagram illustrating the implementation of a multifunctional rotary vibrating sleeve power tool in the embodiments of this application to achieve resistance winding;

[0035] Figure 8 This is a schematic diagram of a multi-functional rotary vibratory casing lowering power tool provided in the embodiments of this application before well wall trimming;

[0036] Figure 9 This is a schematic diagram of a multi-functional rotary vibratory casing lowering power tool provided in the embodiments of this application after well wall trimming;

[0037] Figure 10 This is a schematic diagram of a multi-functional rotary vibratory casing power tool used in the embodiments of this application for cleaning rock cuttings;

[0038] Figure 11 This is a schematic diagram illustrating the use of a multifunctional rotary vibratory sleeve lowering power tool to guide the lowering of a sleeve in an ultra-long horizontal section, as provided in the embodiments of this application.

[0039] The reference numerals in the above figures are as follows:

[0040] 1. One-sided head;

[0041] 101. Flow channel hole;

[0042] 102. Narrowing section;

[0043] 103. Middle section;

[0044] 1030. Central channel;

[0045] 1031. Groove;

[0046] 104. Streamlined surface;

[0047] 105. Reamer blade;

[0048] 106. Cutting teeth

[0049] 2. Ball bearings;

[0050] 3. Plug;

[0051] 4. Disc spring;

[0052] 5. Sealing ring;

[0053] 6. Piston;

[0054] 7. Tighten the nut;

[0055] 8. Turbine assembly;

[0056] 9. Turbine shaft;

[0057] 10. Pressure ring;

[0058] 11. Dynamic valve;

[0059] 12. Fixed valve;

[0060] 13. Central ring;

[0061] 14. Oscillating sub-junction;

[0062] 15. Shell;

[0063] 16. Connector;

[0064] 141. Liquid inlet;

[0065] 1402. Upper turbulence hole;

[0066] 1403. Lower turbulence hole;

[0067] 1404, Upper branch flow channel;

[0068] 1405. Lower branch flow channel;

[0069] 1406. Liquid outlet. Detailed Implementation

[0070] 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.

[0071] 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 in the specification of this application 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.

[0072] After conducting in-depth research on the relevant technologies, the inventors of this application discovered that:

[0073] Currently, the core technologies of casing power tools are mainly concentrated in the fields of hydraulically driven rotary guide shoes and intelligent torque control. However, the related technology layout has not yet extensively involved the field of rotary vibration function. For example, although a drillable guide shoe provided in related technologies can be adapted to medium-hard strata, it has not integrated vibration-assisted lowering technology, and there is still room for improvement in power performance.

[0074] In addition, while some progress has been made in related technological research, such as the disclosure of an eccentric hydraulic rotary guide shoe (which improves its throughput in complex wellbores to some extent by eccentrically designing the guide shoe structure and optimizing the helical blades), another related technology discloses a turbine-type combined friction-reducing tool that can change the flow state of drilling fluid, providing a new approach to friction-reducing technology. This tool mainly consists of a tie rod, upper housing, pulse generator, turbine, and valve assembly. Its core technological feature lies in its unique two-stage pulse generation structure: the 30° cone angle of the fluid inlet cone increases the hydraulic pressure difference in the drilling fluid; the pulse generator's flow channel design generates a first hydraulic pulse of 10Hz-15Hz; then, eight turbines convert the linear fluid flow into rotational motion, causing valve A to rotate and change the flow area with the fixed valve B, generating a second hydraulic pulse of 10Hz-20Hz. After the two pulses are superimposed, the frequency stabilizes at 20Hz-30Hz, which can drive the tie rod to generate axial vibration. In conjunction with the double disc spring, the tie rod is reset, and finally the static friction of drilling is converted into dynamic friction, which effectively reduces friction and increases drilling speed.

[0075] In summary, the relevant technologies exhibit a significant limitation in their limited functionality: international giants focus on hydraulic rotation and torque control, lacking oscillation assistance; some domestic technologies emphasize structural optimization to improve maneuverability, while others, although involving friction reduction mechanisms, fail to address key functions such as improved guidance accuracy, wellbore trimming, and efficient flow guidance, thus failing to form an integrated solution encompassing guidance, flow guidance, friction reduction, and wellbore trimming. Even domestically implemented technologies such as hydraulic rotating floats and multi-stage radial turbine-driven casing shoes primarily focus on breakthroughs in a single or limited function, making it difficult to comprehensively address the diverse challenges of complex trajectories, small wellbores, and long horizontal well sections. Therefore, to ensure smooth casing / tailpipe installation, reduce operational risks, and meet the development needs of deep and ultra-deep, offshore, and unconventional oil and gas reservoirs, there is an urgent need to develop a casing-running power tool that integrates guidance, flow guidance, and wellbore trimming functions, possessing excellent power traction capabilities and wellbore cleaning effects. This tool would be crucial for overcoming the challenges of casing / tailpipe installation in ultra-deep wells, wells with large displacement and complex three-dimensional trajectories, and ultra-long horizontal well sections.

[0076] To address the limitations of conventional casing / tailpipe running tools in complex well casing / tailpipe operations, which suffer from single-function limitations and lack integrated capabilities in guidance, flow diversion, and wellbore trimming, making it difficult to meet practical needs, this invention provides a multi-functional rotary vibration casing running tool. By integrating dual-frequency vibration drive, telescopic reset, guidance, and wellbore trimming structures, it achieves comprehensive functions such as guidance, flow diversion, wellbore trimming, and casing traction, thereby improving the efficiency and success rate of casing / tailpipe running in complex well conditions.

[0077] Please refer to the following for comprehensive information. Figures 1 to 6This application specification provides a multifunctional rotary vibratory downsleeving power tool, which may include: a housing 15, the housing 15 being a hollow tubular shape, the housing 15 having a first end and a second end opposite to each other; a connector 16, the connector 16 being sealed to the first end of the housing 15; an eccentric head 1, the eccentric head 1 being telescopically and rotatably disposed at the second end of the housing 15, the eccentric head 1 having an eccentric structure, the eccentric head 1 having a flow channel hole 101, and the surface of the eccentric head 1 having a cutting structure; and a dual-frequency vibration drive module, including a low-frequency hydraulic pulse mechanism and a high-frequency hydraulic pulse mechanism, the low-frequency hydraulic pulse mechanism being used to generate a first hydraulic pulse with a first frequency, and the high-frequency hydraulic pulse mechanism being used to generate a second hydraulic pulse with a second frequency. Force pulse; the first frequency is less than the second frequency; the first hydraulic pulse generated by the low-frequency hydraulic pulse mechanism and the second hydraulic pulse generated by the high-frequency hydraulic pulse mechanism are superimposed to form dual-frequency vibration; the telescopic reset module includes a piston 6 located between the eccentric head 1 and the housing 15, and a reset member located between the piston 6, the eccentric head 1 and the housing 15; after the drilling fluid flows into the tool from the first end of the housing 15, it first acts on the dual-frequency vibration drive module to form dual-frequency vibration. When the pulse force generated by the dual-frequency vibration is transmitted to the piston 6, it pushes the piston 6 to drive the eccentric head 1 to extend axially along the housing 15, while compressing the reset member. The drilling fluid flows out from the flow channel hole 101 of the eccentric head 1, generating a reaction force to drive the eccentric head 1 to rotate around its own axis.

[0078] The multifunctional rotary vibratory casing lowering power tool provided in this application embodiment achieves dual-frequency vibration through a dual-frequency vibration drive module, enabling pulse frequencies greater than 30Hz. This dual-frequency vibration makes the casing lowering process smoother, significantly improving lowering efficiency, greatly shortening operation time, and reducing non-productive time costs. Simultaneously, the retractable eccentric head 1 integrates rotation and vibration functions. When encountering sudden changes in wellbore trajectory or irregular areas, the retractable eccentric head 1 can adjust its position in real time, guiding the casing along the optimal path, avoiding excessive collision or wear with the wellbore, ensuring the safety and stability of casing lowering, effectively reducing the risk of casing damage, and improving casing service life and lowering success rate.

[0079] In terms of wellbore trimming, the cutting structure on the eccentric head 1, combined with the dual-frequency vibration function of this invention, can trim irregular parts of the wellbore in real time, improving wellbore quality. Especially in deep wells and horizontal wells with long horizontal sections and large displacement, it can effectively avoid difficulties in casing installation and stuck pipe accidents caused by wellbore irregularities, ensuring smooth operation.

[0080] Through the synergistic functions of guidance, diversion, and wellbore trimming, the casing / tailpipe is facilitated to be accurately run along the designed trajectory during the running of casing / tailpipe in ultra-long horizontal well sections. This improves the centering of the casing / tailpipe, reduces running risks, and increases the success rate of running casing / tailpipe. At the same time, it creates favorable conditions for subsequent cementing operations, which is conducive to improving cementing quality.

[0081] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0082] The multi-functional rotary vibratory casing down-running power tool provided in this application embodiment may include a guiding and wellbore trimming module, a dual-frequency vibration drive module, a telescopic reset module, and a sealing and positioning module. Each module forms a collaborative working system through a preset assembly relationship to achieve the comprehensive functions of guiding, diverting, wellbore trimming, and casing traction.

[0083] Specifically, the guiding and wellbore trimming module is used to center the tool within the wellbore, while scraping and trimming irregular parts of the wellbore, cleaning cuttings, and enlarging the borehole to ensure a smooth casing insertion path.

[0084] The dual-frequency vibration drive module can generate dual-frequency hydraulic pulses based on the principles of fluid mechanics, forming periodic pressure fluctuations and pulse forces, providing core power for the tool and improving the casing lowering traction capability.

[0085] The telescopic reset module is used in conjunction with the power output of the dual-frequency vibration drive module to realize the axial telescopic and automatic reset of the core components of the guide and well wall trimming module, ensuring the guidance accuracy and the stability of well wall trimming.

[0086] In addition, the upper-level function of the sealing and positioning module is to provide assembly positioning reference for the other three major modules, realize sealing and isolation between components, prevent drilling fluid leakage, and ensure the overall assembly accuracy and operational reliability of the tool.

[0087] The coordination and cooperation among the modules is as follows: the sealing and positioning module, as the basic support module, provides installation limits and sealing guarantees for the guiding and wellbore trimming module, the dual-frequency vibration drive module, and the telescopic reset module through a preset positioning structure; the dual-frequency vibration drive module generates dual-frequency hydraulic pulses when drilling fluid flows through it, and the pulse force is transmitted to the telescopic reset module, driving its core component to produce axial movement; the axial movement of the telescopic reset module drives the core component of the guiding and wellbore trimming module to achieve telescopic and rotational movement, while the pulse force generated by the dual-frequency vibration drive module synchronously achieves the flow guiding function; finally, through the linkage and cooperation of the four modules, the tool has the functions of guiding, flow guiding, wellbore trimming, and strong traction, and is suitable for complex well casing / tailpipe running operations.

[0088] Please refer to the following: Figure 2 and Figure 3Specifically, the guiding and wellbore dressing module may include an eccentric head 1. The eccentric head 1 is the core actuator of this module, employing an eccentric structure design to achieve a centered guiding function. The eccentric head 1 has circumferentially formed flow channels 101 for drilling fluid circulation, and the portion of the eccentric head 1 located outside the housing 15 is a streamlined surface 104. Based on fluid mechanics principles, the streamlined surface 104 reduces drilling fluid resistance during tool movement within the wellbore and lowers frictional resistance during casing installation.

[0089] The streamlined surface 104 is provided with a reamer 105 for well wall finishing. The reamer 105 is equipped with cutting teeth 106. The cutting teeth 106 are used to scrape the rock wall, remove rock cuttings, and enlarge the hole to enhance the scraping and enlarging capabilities of the eccentric head 1.

[0090] The reamer 105 on the streamlined surface 104 serves as the mounting base for the cutting structure. The cutting teeth 106 arranged on the reamer 105 can be made of wear-resistant alloy material. When the eccentric head 1 rotates, the cutting teeth 106 contact the irregular parts of the well wall and scrape off the protruding parts of the rock wall and clean the deposited rock cuttings through the rotational cutting force. At the same time, the wellbore is slightly enlarged to ensure a smooth casing entry path and effectively avoid stuck drill bit.

[0091] The eccentric head 1 has a central channel 1030 for receiving drilling fluid in its middle part. The central channel 1030 is connected to the flow channel 101. One end of the flow channel 101 is connected to the end of the central channel 1030, and the other end extends to the outer surface of the eccentric head 1, and is inclined. When the fluid flows through the central channel 1030 and out of the eccentric head 1 through the flow channel 101, the fluid reaction force drives the eccentric head 1 to rotate. The centrifugal force generated by the rotation of the eccentric head 1 keeps the eccentric head 1 near the central axis of the wellbore. At the same time, the rotating cutting teeth 106 simultaneously complete the scraping of the rock wall, cleaning of rock cuttings, and hole enlargement operations. This eccentric head 1 realizes the simultaneous operation of guidance and well wall dressing, improves the efficiency and safety of casing running, and avoids the problems of well wall collision and insufficient cutting dressing caused by guidance deviation.

[0092] The reamer ribs 105 are evenly distributed along the circumference of the eccentric head 1, and the number of reamer ribs 105 is between 3 and 6. The extending direction of the reamer ribs 105 forms a helical angle of 15° to 45° with the axis of the eccentric head 1.

[0093] The reamer 105 is evenly distributed (3 to 6) along the circumference of the eccentric head 1, which can make the cutting force of the cutting teeth 106 on the well wall evenly distributed, avoiding the well wall collapse or damage to the cutting teeth 106 due to excessive local cutting force. The extension direction of the reamer 105 is at a helix angle of 15° to 45° with the axis of the eccentric head 1. This angle range can balance the cutting efficiency and cutting resistance, ensuring that the cutting teeth 106 can effectively scrape the well wall, while avoiding the increase in resistance caused by excessive helix angle.

[0094] The number of flow channel holes 101 is between 1 and 3. When the number of flow channel holes 101 is greater than 1, the multiple flow channel holes 101 are evenly spaced along the circumference.

[0095] The number of flow channel holes 101 is 1 to 3. In particular, when multiple flow channel holes 101 are evenly distributed, the reaction force generated when the drilling fluid flows out can be evenly distributed along the circumference of the eccentric head 1, avoiding the instability of the rotation of the eccentric head 1 caused by a single flow channel hole 101, and improving the guiding accuracy.

[0096] Overall, by optimizing the core parameters of the eccentric head 1, the working stability and operational efficiency of the tool have been improved: the number and helix angle of the reamer 105 have been designed to make well wall trimming more uniform and efficient, reduce the risk of well wall collapse, and extend the service life of the cutting teeth 106; the number of flow channel holes 101 has been designed to ensure the rotational stability of the eccentric head 1, improve the guiding accuracy, and avoid well wall collisions caused by rotational eccentricity.

[0097] Please refer to the following: Figure 1 and Figure 2 The telescopic reset module may include a piston 6, a reset component (e.g., a disc spring 4), and a sealing ring 5. The piston 6 is a power transmission component, one end of which is threadedly connected to the eccentric head 1 of the guide and wellbore dressing module, and the other end is adjacent to the turbine assembly 8 of the dual-frequency vibration drive module. The reset component (e.g., the disc spring 4) is a reset elastic component, installed between the eccentric head 1 and the piston 6, and is limited by the internal steps of the housing 15 in the sealing and positioning module. The sealing ring 5 is installed in the sealing groove of the piston 6 to achieve drilling fluid sealing between the piston 6 and the housing 15. The superimposed hydraulic pulses generated by the dual-frequency vibration drive module act on the piston 6, pushing the piston 6 to move axially, thereby causing the eccentric head 1 to extend and compress the disc spring 4. When the hydraulic pulses disappear, the compressed disc spring 4 releases its elastic potential energy, driving the piston 6 and the eccentric head 1 to return to their original positions in the opposite direction, realizing the telescopic reset cycle of the eccentric head 1.

[0098] In one embodiment, the piston 6 is sealed within the housing 15. The eccentric head 1 has an external thread on the outer side of one end of the housing 15, and an internal thread on the inner side of the piston 6. The eccentric head 1 and the piston 6 are threaded together. A reduced diameter section 102 is formed on the side of the eccentric head 1 near the piston 6. The reset member is sleeved outside the reduced diameter section 102 of the eccentric head 1. One end of the reset member abuts against the piston 6, and the other end abuts against the reduced diameter step of the eccentric head 1.

[0099] The piston 6 is sealed inside the housing 15. The sealing structure (such as the sealing ring 5) prevents the drilling fluid from leaking between the piston 6 and the housing 15, ensuring that the drilling fluid can fully act on the dual-frequency vibration drive module and improve the power transmission efficiency.

[0100] The external thread on the outer side of the reduced diameter section 102 of the eccentric head 1 engages with the internal thread on the inner side of the piston 6, enabling a detachable and fixed connection between the two, which facilitates installation and maintenance. At the same time, the threaded connection ensures the stability of power transmission between the piston 6 and the eccentric head 1, allowing the axial force of the piston 6 to be effectively transmitted to the eccentric head 1.

[0101] The reset component is sleeved outside the reduced diameter section 102 of the eccentric head 1, with one end abutting against the piston 6 and the other end abutting against the reduced diameter step of the eccentric head 1. When the piston 6 pushes the eccentric head 1 to extend, the piston 6 compresses the reset component to accumulate elastic potential energy. When the pulse force weakens or disappears, the elastic potential energy of the reset component is released, pushing the piston 6 and the eccentric head 1 back to their original positions, thus realizing the telescopic reset cycle.

[0102] In one embodiment, the eccentric head 1 includes an exposed portion located outside the reduced diameter section 102 and the housing 15, and an intermediate section 103 located between the reduced diameter section 102 and the exposed portion. The outer sidewall of the intermediate section 103 and the inner sidewall of the housing 15 are respectively provided with grooves 1031 for mounting the ball bearings 2. When the eccentric head 1 extends axially along the housing 15, the grooves 1031 of the intermediate section 103 are directly opposite to the grooves 1031 of the housing 15.

[0103] Specifically, the groove 1031 includes multiple sets, and the multiple sets of grooves 1031 are distributed at intervals along the axial direction. The housing 15 has a mounting hole (e.g., a threaded hole) for each set of grooves 1031 to communicate with the groove 1031. The ball 2 is installed into the groove 1031 through the mounting hole, and a screw plug 3 is provided in the mounting hole.

[0104] In this embodiment, the guiding and wellbore dressing module may include ball bearings 2. The ball bearings 2 are inserted through threaded holes on the housing 15 and are embedded in the corresponding grooves 1031 of the housing 15 and the eccentric head 1, forming a rotatable fit structure between the eccentric head 1 and the housing 15. When the drilling fluid flows out from the flow channel hole 101 of the eccentric head 1, the eccentric head 1 is driven to rotate by the fluid reaction force. The centrifugal force generated by the rotation of the eccentric structure keeps the eccentric head 1 near the central axis of the wellbore. At the same time, the rotating cutting teeth 106 simultaneously complete the scraping of the rock wall, cleaning of rock cuttings and hole enlargement operations.

[0105] In this embodiment, the eccentric head 1 may include a reduced diameter section 102, an intermediate section 103, and an exposed portion. The segmented structure facilitates the assembly of each component. The reduced diameter section 102 provides installation space for the reset component, the intermediate section 103 provides an assembly base for the ball bearing 2, and the exposed portion realizes the guiding and well wall trimming functions.

[0106] The outer wall of the intermediate section 103 is provided with grooves 1031 corresponding to the inner wall of the shell 15. The ball bearings 2 are installed in the grooves 1031 to form a rolling friction fit. When the eccentric head 1 extends along the axial direction of the shell 15, the grooves 1031 of the intermediate section 103 are aligned with the grooves 1031 of the shell 15, ensuring that the ball bearings 2 can stably support the rotation of the eccentric head 1, reducing the rotational friction resistance between the eccentric head 1 and the shell 15, ensuring that the eccentric head 1 can rotate smoothly under the fluid reaction force, and improving the efficiency of guidance and well wall dressing.

[0107] By optimizing the installation structure of the ball bearing 2, the working stability and service life of the tool are further improved: the design of multiple grooves 1031 improves the coaxiality of the rotation of the eccentric head 1, ensuring the guiding accuracy and the uniformity of well wall dressing; the sealing design of the screw plug 3 avoids the corrosion of the ball bearing 2 by the drilling fluid, prevents the ball bearing 2 from rusting or getting stuck, and extends the service life of the ball bearing 2 and the eccentric head 1; the design of the mounting hole simplifies the installation and replacement process of the ball bearing 2 and reduces maintenance costs.

[0108] When the mounting hole is a threaded hole, the screw plug 3 engages with the threaded hole, facilitating the adjustment of the position of the screw plug 3. This allows for precise adjustment of the preload of the ball 2. Specifically, the axial clamping degree of the screw plug 3 can be changed by screwing it in or out, preventing the eccentric head 1 from wobbling due to excessive looseness of the ball 2, or increasing the rotational friction resistance due to excessive tightness, ensuring that the ball 2 is always in the optimal working state. At the same time, it can also compensate for minor deviations that occur during assembly or long-term use. For example, when the ball 2 or the groove 1031 shows slight wear, the position of the screw plug 3 can be finely adjusted to ensure the fit between the ball 2 and the groove 1031, maintain the stability of the rotation of the eccentric head 1, and further extend the overall service life of the tool.

[0109] The dual-frequency vibration drive module may include an oscillation sub 14, a turbine assembly 8, a turbine shaft 9, a moving valve 11, and a fixed valve 12. The oscillation sub 14 is the first-path hydraulic pulse generating component, containing a special chamber designed based on the fluid wall effect self-excited oscillation principle to generate low-frequency hydraulic pulses. The turbine assembly 8, turbine shaft 9, moving valve 11, and fixed valve 12 constitute the second-path hydraulic pulse generating assembly. The turbine assembly 8 is the power transmission component. The moving valve 11 and fixed valve 12 are pulse regulating components. The turbine assembly 8 is installed within the limiting space provided by the sealing and positioning module. When drilling fluid flows through it, it drives the turbine assembly 8 to rotate. The turbine assembly 8 drives the coaxially connected turbine shaft 9 to rotate synchronously, which in turn drives the moving valve 11, threadedly connected to the lower end of the turbine shaft 9, to rotate. The fixed valve 12 is fixedly installed below the moving valve 11 and has a corresponding flow orifice. The rotation of the moving valve 11 achieves the periodic opening and closing of the flow orifice, changing the flow area to generate high-frequency hydraulic pulses. The low-frequency hydraulic pulses generated by the oscillating sub-section 14 are superimposed with the high-frequency hydraulic pulses generated by the moving valve 11 and the stationary valve 12, forming a dual-frequency vibration.

[0110] The sealing and positioning module includes a plug 3, a clamping nut 7, a pressure ring 10, a center ring 13, a housing 15, and a connector 16. The housing 15 serves as the mounting carrier for each module and has multiple stepped structures inside to provide axial positioning references for components such as the disc spring 4, turbine assembly 8, and oscillating sub-section 14. The plug 3 is installed in the threaded hole at the upper end of the housing 15 to achieve sealing at the upper end of the housing 15. The clamping nut 7 is threaded to one end of the turbine shaft 9 and engages with the internal step in the middle of the housing 15 to position the upper end of the turbine assembly 8. The pressure ring 10 is installed at one end of the turbine assembly 8 and engages with the stepped structure of the turbine shaft 9 to position one end of the turbine assembly 8, while also providing axial limiting for the stationary valve 12. The center ring 13 is located on one side of the stationary valve 12 to achieve radial positioning of the stationary valve 12. The connector 16 is threaded to one end of the housing 15 and engages with the internal step at one end of the housing 15 to achieve bidirectional positioning of the oscillating sub-section 14. All components form an integrated assembly system through the above positioning structures, ensuring structural stability during tool operation.

[0111] In one embodiment, the high-frequency hydraulic pulse mechanism includes a turbine assembly 8, a turbine shaft 9, a moving valve 11, and a fixed valve 12. The moving valve 11 and the fixed valve 12 are each provided with at least one flow-through orifice to adjust the pulse. The turbine assembly 8 transmits power. The turbine shaft 9 is coaxially mounted inside the turbine assembly 8. The moving valve 11 is connected to one end of the turbine shaft 9. The turbine shaft 9 has a hollow tubular structure. When drilling fluid flows through the high-frequency hydraulic pulse mechanism, it drives the turbine assembly 8 to rotate. The turbine assembly 8 drives the turbine shaft 9 to rotate synchronously, thereby driving the moving valve 11 to rotate. The fixed valve 12 is fixedly installed inside the housing 15. The rotation of the moving valve 11 enables the periodic opening and closing of the flow-through orifice, changing the flow area to generate high-frequency hydraulic pulses.

[0112] In this embodiment, the high-frequency hydraulic pulse mechanism includes a turbine assembly 8, a turbine shaft 9, a moving valve 11, and a fixed valve 12. When the drilling fluid flows through the turbine assembly 8, it drives the turbine assembly 8 to rotate. The turbine assembly 8 drives the coaxially mounted turbine shaft 9 to rotate synchronously, which in turn drives the moving valve 11 to rotate. The fixed valve 12 is fixedly installed in the housing 15. When the moving valve 11 rotates, its flow hole and the flow hole of the fixed valve 12 periodically open and close, changing the flow area of ​​the drilling fluid and generating periodic pressure fluctuations, thus forming a high-frequency hydraulic pulse.

[0113] In one embodiment, the eccentric head 1 has a central channel 1030 for receiving drilling fluid in its middle part. The central channel 1030 is connected to the flow channel 101. A clamping member is provided at the opening of the turbine shaft 9 away from the moving valve 11. The piston 6 has a through hole in its middle part that mates with the central channel 1030. One end of the clamping member is blocked at the opening of the turbine shaft 9. When the reset member is reset, the other end of the clamping member can extend into the through hole of the piston 6.

[0114] In this embodiment, by optimizing the fit between the turbine shaft 9, the clamping component, and the piston 6, the structural stability and operational safety of the tool are improved: the sealing design of the clamping component prevents the drilling fluid from corroding the turbine assembly 8 and the turbine shaft 9, extending the service life of the high-frequency hydraulic pulse mechanism; the linkage limit design can prevent component collision damage caused by excessive piston 6 reset, reducing the risk of tool failure; it can ensure the smoothness of the drilling fluid flow path and avoid the problem of poor flow due to structural interference.

[0115] Please refer to the following: Figure 4 and Figure 5 In one embodiment, the flow passages provided on the moving valve 11 and the fixed valve 12 are fan-shaped or arc-shaped, and the number of flow passages is one to three. The pulse frequency generated by the periodic opening and closing of the moving valve 11 and the fixed valve 12 is greater than 20 Hz.

[0116] In this embodiment, the flow passage adopts a fan-shaped or arc-shaped hole. This shape allows the flow area to change smoothly with the rotation of the valve 11, avoiding pressure shocks caused by sudden changes in the flow area and ensuring the stability of high-frequency pulses.

[0117] The number of flow passages is 1 to 3. The frequency of the high-frequency pulse can be adjusted by combining the different number of flow passages with the rotation speed of the moving valve 11. By limiting the frequency range to greater than 20 Hz, it is ensured that the high-frequency pulse can be effectively superimposed with the low-frequency pulse to form a stable dual-frequency vibration.

[0118] The limitation on the number of flow holes provides a basis for high-frequency pulse frequency adjustment to meet the power requirements of different well conditions; the frequency range of more than 20 Hz generated by the combination of the moving valve 11 and the fixed valve 12 is conducive to ensuring that it is effectively superimposed with the low-frequency pulse, and the synthesized dual-frequency vibration power is stronger, thereby improving the casing traction capability.

[0119] Please refer to the following: Figure 6 In one embodiment, the low-frequency hydraulic pulse mechanism includes an oscillating section 14 passing through the housing 15. One end of the oscillating section 14 abuts against the connector 16, and the other end of the oscillating section 14 abuts against the fixed valve 12 through the central ring 13. The oscillating section 14 includes a section body passing through the housing 15. A flow chamber is provided in the section body. The flow chamber includes: a liquid inlet 141, an upper turbulence hole 1402, a lower turbulence hole 1403, an upper diversion channel 1404, a lower diversion channel 1405, and a liquid outlet 1406.

[0120] Specifically, along the main flow direction of the fluid, the inlet hole 141, the upper turbulence hole 1402, the lower turbulence hole 1403, and the outlet hole 1406 are arranged sequentially. One end of the upper diversion channel 1404 is connected to the transition position between the upper turbulence hole 1402 and the lower turbulence hole 1403, and the other end of the upper diversion channel is connected to the transition position between the lower turbulence hole 1403 and the outlet hole 1406. One section of the lower diversion channel 1405 is located at the transition position between the lower turbulence hole 1403 and the outlet hole 1406, and the other end radially penetrates the short section body.

[0121] Wherein, the inlet hole 141 is an axially extending cylindrical hole along the fluid flow direction, the upper turbulence hole 1402 is a tapered hole with a gradually decreasing flow cross-section, the lower turbulence hole 1403 is a tapered hole with a gradually increasing flow cross-section, the outlet hole 1406 is an axially extending cylindrical hole, the diameter of the outlet hole 1406 is smaller than the diameter of the inlet hole 141, and the upper diversion channel 1404 is a plurality of bypass channels surrounding the lower turbulence hole 1403.

[0122] In this embodiment, the oscillating sub 14 is inserted into the housing 15, with one end abutting against the connector 16 and the other end abutting against the fixed valve 12 through the central ring 13 to achieve axial positioning; the central ring 13 simultaneously ensures the sealing between the oscillating sub 14 and the fixed valve 12 and the flow of drilling fluid.

[0123] The inlet hole 141 is a cylindrical hole to ensure a stable inflow of drilling fluid. The upper turbulence hole 1402 is a tapered hole that can be used to accelerate the drilling fluid flow rate; the lower turbulence hole 1403 is a tapered hole that can cause the drilling fluid to diffuse; the outlet hole 1406 is a cylindrical hole with a smaller diameter than the inlet hole 141, creating a throttling effect and enhancing the fluid adhesion effect. In addition, the upper diversion channel 1404 consists of multiple bypass channels surrounding the lower turbulence hole 1403, which can guide part of the drilling fluid to form a bypass flow, enhance the stability of fluid flow direction switching, and ensure the frequency stability of low-frequency pulses.

[0124] Overall, by optimizing the flow chamber channel structure, the stability and intensity of low-frequency pulses were improved: the combined design of conical and cylindrical holes enabled the acceleration, diffusion, and throttling of drilling fluid, enhanced the fluid adhesion effect, and improved the intensity of low-frequency pulses; the design of multiple upper diversion channels 1404 ensured the stability of fluid flow direction switching and avoided excessive fluctuations in low-frequency pulse frequency; the optimization of the channel shape enabled low-frequency pulses to be better superimposed with high-frequency pulses, further improving the dynamic performance of dual-frequency vibration.

[0125] The pulse frequency of the low-frequency hydraulic pulse mechanism is greater than 10 Hz, and the pulse frequency of the dual-frequency vibration drive module is greater than 30 Hz.

[0126] The low-frequency hydraulic pulse mechanism has a pulse frequency greater than 10 Hz. The low-frequency pulse frequency is superimposed with the high-frequency pulse to form a stable dual-frequency vibration, which improves the tool's adaptability to different well conditions. By limiting the parameters of torque, pulse force and synthetic frequency, the tool is ensured to have strong traction power, which can effectively solve the problem of difficult casing / tailpipe installation in complex well conditions such as ultra-long horizontal well sections.

[0127] To address the limitations of conventional casing / tailpipe running tools in complex well casing / tailpipe operations, which suffer from single-function limitations and lack integrated capabilities in guidance, flow diversion, and wellbore trimming, making them unsuitable for practical needs, this invention proposes a multifunctional rotary vibration casing running tool design method and device. The tool's eccentric head 1 employs a retractable eccentric structure design, rotating to generate centrifugal force that keeps the tool consistently positioned near the wellbore's central axis, providing guidance. Utilizing the self-excited oscillation principle of the turbine's moving and stationary valves 12 and the wall-attached effect generated by the oscillating sub 14 during fluid circulation, dual-frequency vibration is achieved, inducing periodic pressure fluctuations and generating significant pulse force and frequency, thus providing excellent flow diversion and greatly improving casing running capability. Furthermore, its turbine structure... This technology can greatly improve the stability and reliability of power tools; the streamlined head design of the tool can reduce drilling resistance; the eccentric head 1 is designed with a reamer, which can scrape the rock wall, clean rock cuttings and enlarge the hole; it can integrate functions such as guidance, flow guidance and well wall trimming, and has both excellent power traction capability and can ensure the integrity of the wellbore. It can be used to reduce the difficulty of running casing / tailpipe in ultra-deep wells, large-displacement three-dimensional wells, complex wellbore trajectory wells and ultra-long horizontal well sections, thereby efficiently utilizing the completion section or long horizontal section to achieve efficient development of deep, thick reservoirs and unconventional low-permeability oil and gas reservoirs.

[0128] like Figure 1 As shown, in one specific embodiment, the multi-functional rotary sleeve power tool mainly includes: eccentric head 1, ball bearing 2, screw plug 3, disc spring 4, sealing ring 5, piston 6, clamping nut 7, turbine assembly 8, turbine shaft 9, pressure ring 10, moving valve 11, fixed valve 12, center ring 13, oscillation sub 14, housing 15, and connector 16.

[0129] Eccentric head 1 and piston 6 are connected by threads; plug 3 is installed in the threaded hole of housing 15; clamping nut 7 is connected to one end of turbine shaft 9 by threads; dynamic valve 11 is connected to the other end of turbine shaft 9 by threads; connector 16 is connected to the end of housing 15 by threads; ball bearing 2 is installed in the groove 1031 of housing 15 and eccentric head 1 through the threaded hole of housing 15; disc spring 4 is installed between eccentric head 1 and piston 6, and is limited by the step inside housing 15 and the step on eccentric head 1; sealing ring 5 is installed in the sealing groove of piston 6; turbine assembly 8 is installed between piston 6 and pressure ring 10, one end of which is positioned by clamping nut 7 and the step inside the middle of housing 15, and the other end is positioned by the step of turbine shaft 9 and pressure ring 10; fixed valve 12 is installed on the dynamic valve 11. Between valve 11 and center ring 13; one end of oscillating short section 14 is positioned by the internal step of housing 15, and the other end of oscillating short section is positioned by connector 16; after drilling fluid flows through, oscillating short section 14 will generate hydraulic pulses due to fluid adhesion effect; after drilling fluid flows through, turbine assembly 8 will drive turbine shaft 9 and moving valve 11 to rotate; the flow holes of moving valve 11 and fixed valve 12 will periodically open and close, thereby causing changes in flow area and generating hydraulic pulses again; under the action of enhanced hydraulic pulses, piston 6 axially pushes eccentric head 1 and compresses disc spring 4, and after the hydraulic pulses disappear, the compressed disc spring 4 causes eccentric head 1 to return to its original position; when drilling fluid flows out from flow channel hole 101 of eccentric head 1, eccentric head 1 will rotate due to fluid reaction force.

[0130] Please see Figure 7 When the multi-functional rotary vibratory downsleeving power tool encounters a shoulder, the guiding function can be used to guide the multi-functional rotary vibratory downsleeving power tool to smoothly pass through the shoulder area.

[0131] Please see Figure 8 When this multi-functional rotary vibratory casing downhole power tool encounters an irregular well wall, its well wall trimming function can be used to trim the irregular well wall in that area, such as... Figure 9 As shown, it was reshaped into a regular well wall.

[0132] Please see Figure 10 When this multi-functional rotary vibratory downsleeving power tool encounters rock cuttings or gravel, it can use its rock cutting cleaning function to perform jet cleaning on them.

[0133] Please see Figure 11 When this multi-functional rotary vibratory casing-running power tool is used to perform casing-running operations in an ultra-long horizontal well, it can overcome the problems of high friction and difficulty in lowering the casing, and successfully achieve casing-running operations in an ultra-long horizontal well.

[0134] 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.

[0135] The various embodiments described in this specification are presented in a progressive manner, with each embodiment focusing on its differences from the others. 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 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 included within the scope of protection of the present invention.

Claims

1. A multifunctional rotary vibratory downsleeving power tool, characterized in that, The multi-functional rotary vibratory sleeve lowering power tool includes: A housing, the housing being hollow and tubular, the housing having opposing first and second ends; A connector, which is sealed to the first end of the housing; An eccentric head is telescopically and rotatably disposed at the second end of the housing. The eccentric head has an eccentric structure, a flow channel hole is provided on the eccentric head, and a cutting structure is provided on the surface of the eccentric head. A dual-frequency vibration drive module includes a low-frequency hydraulic pulse mechanism and a high-frequency hydraulic pulse mechanism. The low-frequency hydraulic pulse mechanism generates a first hydraulic pulse with a first frequency, and the high-frequency hydraulic pulse mechanism generates a second hydraulic pulse with a second frequency. The first frequency is less than the second frequency. The first hydraulic pulse generated by the low-frequency hydraulic pulse mechanism and the second hydraulic pulse generated by the high-frequency hydraulic pulse mechanism are superimposed to form dual-frequency vibration. The telescopic reset module includes a piston located between the eccentric head and the housing, and a reset member located between the piston, the eccentric head and the housing.

2. The multifunctional rotary vibratory downsleeving power tool as described in claim 1, characterized in that, The portion of the eccentric head located outside the housing has a streamlined surface, and the streamlined surface is provided with a reamer rib for well wall trimming. The cutting structure includes cutting teeth arranged on the reamer rib, which are used to scrape the rock wall, remove rock cuttings, and enlarge the borehole.

3. The multifunctional rotary vibratory downsleeving power tool as described in claim 2, characterized in that, The eccentric head has a central channel in the middle for receiving drilling fluid. The central channel is connected to the flow channel hole. One end of the flow channel hole is connected to the end of the central channel hole, and the other end extends to the outer surface of the eccentric head at an angle. When the fluid flows through the central channel hole and out of the eccentric head through the flow channel hole, the fluid reaction force drives the eccentric head to rotate. The centrifugal force generated by the rotation of the eccentric head keeps the eccentric head near the central axis of the wellbore. At the same time, the rotating cutting teeth simultaneously complete the scraping of the rock wall, cleaning of rock cuttings, and hole enlargement operations.

4. The multifunctional rotary vibratory downsleeving power tool as described in claim 3, characterized in that, The reamer ribs are evenly distributed along the circumference of the eccentric head, and the number of reamer ribs is between 3 and 6. The extension direction of the reamer ribs forms a helical angle of 15° to 45° with the axis of the eccentric head. The number of flow channel holes is between 1 and 3. When the number of flow channel holes is greater than 1, the multiple flow channel holes are evenly spaced along the circumference.

5. The multifunctional rotary vibratory downsleeving power tool as described in claim 1, characterized in that, The piston is sealed inside the housing. The eccentric head is provided with an external thread on the outer side of one end of the housing, and an internal thread on the inner side of the piston. The eccentric head and the piston are threaded together. A reduced diameter section is formed on the side of the eccentric head near the piston. The reset member is sleeved outside the reduced diameter section of the eccentric head. One end of the reset member abuts against the piston, and the other end abuts against the reduced diameter step of the eccentric head.

6. The multifunctional rotary vibratory downsleeving power tool as described in claim 5, characterized in that, The eccentric head includes the reduced diameter section and the exposed portion outside the housing, as well as the intermediate section between the reduced diameter section and the exposed portion. The outer side wall of the intermediate section and the inner side wall of the housing are respectively provided with grooves for installing balls. When the eccentric head extends along the axial direction of the housing, the grooves of the intermediate section are directly opposite the grooves of the housing.

7. The multifunctional rotary vibratory downsleeving power tool as described in claim 6, characterized in that, The groove includes multiple sets, which are spaced apart along the axial direction. The housing has a mounting hole for each set of grooves that communicates with the groove. The ball is inserted into the groove through the mounting hole, and a screw plug is provided in the mounting hole.

8. The multifunctional rotary vibratory downsleeving power tool as described in claim 1, characterized in that, The high-frequency hydraulic pulse mechanism includes a turbine assembly, a turbine shaft, a moving valve, and a fixed valve. The moving valve and the fixed valve each have at least one flow-through orifice for adjusting the pulse. The turbine assembly transmits power, and the turbine shaft is coaxially mounted inside the turbine assembly. The moving valve is connected to one end of the turbine shaft. The turbine shaft has a hollow tubular structure. When drilling fluid flows through the high-frequency hydraulic pulse mechanism, it drives the turbine assembly to rotate. The turbine assembly drives the turbine shaft to rotate synchronously, which in turn drives the moving valve to rotate. The fixed valve is fixedly installed inside the housing. The rotation of the moving valve enables the periodic opening and closing of the flow-through orifice, changing the flow area to generate high-frequency hydraulic pulses.

9. The multifunctional rotary vibratory downsleeving power tool as described in claim 8, characterized in that, The eccentric head has a central channel for receiving drilling fluid in its middle part. The central channel is connected to the flow channel hole. A clamping member is provided at the opening of the turbine shaft opposite to the moving valve. The piston has a through hole in its middle part that mates with the central channel. One end of the clamping member is blocked at the opening of the turbine shaft. When the reset member is reset, the other end of the clamping member can extend into the through hole of the piston.

10. The multifunctional rotary vibratory downsleeving power tool as described in claim 8, characterized in that, The flow passages on the moving valve and the fixed valve are fan-shaped or arc-shaped, and the number of flow passages is one to three. The pulse frequency generated by the periodic opening and closing of the moving valve and the fixed valve is greater than 20 Hz.

11. The multifunctional rotary vibratory downsleeving power tool as described in claim 8, characterized in that, The low-frequency hydraulic pulse mechanism includes an oscillating section passing through the housing. One end of the oscillating section abuts against a connector, and the other end of the oscillating section abuts against a fixed valve via a central ring. The oscillating section includes a section body passing through the housing, and a flow chamber is provided within the section body. The flow chamber includes: a liquid inlet, an upper turbulence hole, a lower turbulence hole, an upper diversion channel, a lower diversion channel, and a liquid outlet. Along the main flow direction of the fluid, the inlet hole, the upper turbulence hole, the lower turbulence hole, and the outlet hole are arranged in sequence. One end of the upper diversion channel is connected to the transition position between the upper turbulence hole and the lower turbulence hole, and the other end of the upper diversion hole is connected to the transition position between the lower turbulence hole and the outlet hole. One section of the lower diversion channel is located at the transition position between the lower turbulence hole and the outlet hole, and the other end radially penetrates the short section body.

12. The multifunctional rotary vibratory downsleeving power tool as described in claim 11, characterized in that, The inlet hole is an axially extending cylindrical hole. Along the fluid flow direction, the upper turbulence hole is a tapered hole with a gradually decreasing flow cross-section, the lower turbulence hole is a tapered hole with a gradually increasing flow cross-section, the outlet hole is an axially extending cylindrical hole, and the diameter of the outlet hole is smaller than that of the inlet hole. The upper diversion channel is a plurality of bypass channels surrounding the lower turbulence hole.

13. The multifunctional rotary vibratory downsleeving power tool as described in claim 12, characterized in that, The pulse frequency of the low-frequency hydraulic pulse mechanism is greater than 10 Hz, and the pulse frequency of the dual-frequency vibration drive module is greater than 30 Hz.

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