Shock absorbing speed increasing hydraulic pressurizer

Abstract

This invention proposes a shock-absorbing and speed-enhancing hydraulic pressurizer, comprising a slidingly sleeved inner tube and an outer tube. The inner wall of the outer tube has an annular cavity, within which a compression cavity is formed between a piston ring and a sealing ring. A through hole is formed on the side wall of the inner tube. A first and second rotary disc are mounted within the inner tube cavity, positioned downstream of the through hole and adjacent to each other. Both the first and second rotary discs have aligned through holes. A driving element drives the first rotary disc to rotate, causing periodic interruptions within the inner tube cavity. This shock-absorbing and speed-enhancing hydraulic pressurizer, by activating the driving element to rotate the first rotary disc at high speed, causes the through holes on the first and second rotary discs to periodically align, creating periodic interruptions within the inner tube cavity. This drives the inner tube to push the drill bit in a telescopic motion, achieving constant pressure pulses and improving drilling efficiency.

Description

Technical Field

[0001] This invention belongs to the field of petroleum drilling technology, and specifically relates to a shock-absorbing and speed-increasing hydraulic pressurizer. Background Technology

[0002] In oil and gas drilling, increasing drilling speed is an important measure to reduce drilling costs and improve exploration and development efficiency. However, in the development of special wells such as horizontal wells, extended reach wells, and high-angle wells, as the inclination increases, the horizontal component of the force on the drill pipe and drill collars becomes smaller and smaller, and the friction between the drill pipe and drill collars and the well wall becomes larger and larger. This results in insufficient drilling pressure transmitted to the drill bit through the drill pipe and drill collars to break the rock. This is especially true in directional and horizontal well drilling, where problems such as pressure build-up, stick-slip vibration, drill skipping, and sudden rotation of the drill string are prone to occur.

[0003] To address this shortcoming, hydraulically driven hydraulic boosters are currently used to apply the pressure drop of drilling fluid to a piston, thereby converting hydraulic pressure into axial force to increase the rock-breaking ability of the drill bit and thus increase the mechanical speed. However, current hydraulic boosters have a high failure rate, wear out seals too quickly, and the telescopic cylinder cannot extend.

[0004] Chinese patent CN115045608A discloses a composite hydraulic pressurizer with a sealing short section, including an upper connector, a valve body, a hydraulic cylinder, a transmission cylinder, a sealing part, a telescopic cylinder, and a central cylinder. In use, the liquid causes the telescopic cylinder to push the central cylinder downward, and the central cylinder pushes the drill bit downward until the lower limit of the telescopic cylinder's stroke. When the drill bit contacts the rock, the central cylinder pushes the telescopic cylinder upward. The valve body squeezes the liquid in the central cylinder and the telescopic cylinder, forming a hydraulic spring effect. After the rock is broken, the telescopic cylinder continues to extend, thereby preventing reciprocating wear from causing mud and sand to enter the pressurizer.

[0005] However, in the aforementioned existing technologies, the telescopic cylinder only activates when the drill bit and rock are compressed, creating a pressurized state within the cylinder. This fails to provide continuous force during drilling and cannot effectively address issues such as drill bit vibration and stick-slip. Consequently, the drilling speed improvement is minimal, and it exacerbates drill bit wear, leading to premature drill bit damage and ultimately reducing drilling speed. Therefore, overcoming the shortcomings of the existing technologies is a pressing issue in this field. Summary of the Invention

[0006] To address the aforementioned problems, this invention proposes a shock-absorbing and speed-increasing hydraulic pressurizer, comprising: an inner tube and an outer tube that are slidably sleeved together; an annular cavity is formed on the inner wall of the outer tube; a piston ring is provided inside the annular cavity; a sealing ring is provided on the outer wall of the inner tube corresponding to the piston ring; a compression cavity is formed between the piston ring and the sealing ring; and a through hole is provided on the side wall of the inner tube to connect the inner cavity of the inner tube with the compression cavity.

[0007] The first and second turntables are coaxially mounted in the inner cavity of the inner tube. The first and second turntables are attached to each other and located downstream of the through hole. Both the first and second turntables are provided with through holes arranged in opposite positions. The first turntable is rotatably sleeved with the inner tube, and the second turntable is fixedly sleeved with the inner cavity of the inner tube.

[0008] The inner tube cavity is equipped with a drive component that is connected to the first turntable. The drive component drives the first turntable to rotate so that the inner tube cavity forms periodic blockages.

[0009] Furthermore, the driving component includes a coaxially arranged guide plate and a connecting shaft. The outer wall of the guide plate is rotatably sleeved with the inner wall of the inner tube, and the guide plate has a number of guide holes arranged in a circumferential array. The guide holes have a spiral structure about the axis of the guide plate.

[0010] One end of the guide plate is connected to one end of the connecting shaft, and the other end of the connecting shaft is connected to the first turntable.

[0011] Furthermore, the through holes include several holes arranged in a circumferential array about the axis of the inner tube.

[0012] Furthermore, the inner tube includes an upper connecting pipe, a connecting fitting, and a lower connecting pipe that are sequentially threaded together;

[0013] The outer wall of the upper connecting pipe slides and seals with the inner wall of the first end of the outer pipe, and the outer wall of the first end of the lower connecting pipe slides and seals with the inner wall of the last end of the outer pipe.

[0014] Furthermore, the outer tube includes an upper connector and a connecting pipe body;

[0015] The inner wall of the upper connector is slidably sleeved with the outer wall of the upper pipe, the outer wall of the tail end of the upper connector is slidably sleeved with the inner wall of the head end of the connecting pipe, and the inner wall of the tail end of the connecting pipe is slidably sleeved with the outer wall of the lower pipe.

[0016] Furthermore, the outer wall of the lower connector head end and the inner wall of the outer connector tail end, as well as the outer wall of the upper connector tail end and the inner wall of the connecting pipe head end, are respectively circumferentially arrayed with several matching key blocks and several keyways.

[0017] Furthermore, the key block includes a first key block and a second key block that operate sequentially. The width of the first key block is smaller than the width of the second key block, and the connecting surface of the first key block and the second key block adopts a bevel transition, forming a keyway between adjacent key blocks.

[0018] Furthermore, it also includes disc spring assemblies and discs, a compression cavity is formed between the tail end of the piston ring and the head end of the sealing ring, one end of several discs is installed on the head end of the piston ring, and the other end of several discs is connected to the tail end of the connector through the disc spring assembly.

[0019] Furthermore, the inner wall of the piston ring at the head end is slidably sealed to the outer wall of the inner tube, and the inner wall of the piston ring at the tail end and the outer wall of the inner tube are respectively provided with matching inserts and slots, both of which extend along the axial direction of the piston ring.

[0020] Furthermore, the piston ring component includes a first piston and a second piston, the sealing ring portion includes a first sealing portion and a second sealing portion, and the through hole includes a first through hole and a second through hole;

[0021] The connecting pipe fitting includes a first connecting pipe and a second connecting pipe with threaded connections at both ends. The first connecting pipe and the second connecting pipe are respectively provided with a first sealing part and a second sealing part.

[0022] The connecting tube body includes a first end tube, a connecting tube, and a second end tube that are sequentially sleeved. The inner wall of the tail end of the first end tube is threadedly sleeved with the outer wall of the head end of the first piston. The inner wall of the head end of the connecting tube is threadedly sleeved with the outer wall of the tail end of the first piston. The inner wall of the tail end of the connecting tube is threadedly sleeved with the outer wall of the head end of the second piston. The inner wall of the head end of the second end tube is threadedly sleeved with the outer wall of the tail end of the second piston.

[0023] Compared with the prior art, the embodiments of the present invention have at least the following advantages:

[0024] The shock-absorbing and speed-increasing hydraulic pressurizer of the present invention drives the first turntable to rotate at high speed through the start-up drive component. Since the second turntable is fixedly sleeved with the inner cavity of the inner tube, during the rotation of the first turntable, the through hole on the first turntable is driven to periodically align with the through hole on the second turntable, causing periodic blockage in the inner cavity of the inner tube. This allows the liquid medium to periodically do work on the compression cavity, providing a constant pressure to the inner tube with low pressure loss. This drives the inner tube to push the drill bit in telescopic motion, achieving a constant pressure pulse, improving drilling efficiency. In this process, it also improves the pressurization method of the drill bit after drilling, eliminating the need for the drill string to provide thrust, and effectively solving the problems of pressure drag and drill skipping during the drilling process.

[0025] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description and the drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1A schematic diagram of the shock-absorbing and speed-boosting hydraulic pressurizer in an embodiment of the present invention is shown;

[0028] Figure 2 A partial schematic diagram of the shock-absorbing and speed-boosting hydraulic pressurizer in an embodiment of the present invention is shown. Figure 1 ;

[0029] Figure 3 A partial schematic diagram of the shock-absorbing and speed-boosting hydraulic pressurizer in an embodiment of the present invention is shown. Figure 2 ;

[0030] Figure 4 A schematic diagram of the first turntable and the driving component in an embodiment of the present invention is shown;

[0031] Figure 5 A schematic diagram of the second turntable in an embodiment of the present invention is shown;

[0032] Figure 6 This diagram illustrates the states of the first and second turntables in an embodiment of the present invention.

[0033] Figure 7 A cross-sectional schematic diagram of the shock-absorbing and speed-boosting hydraulic pressurizer in an embodiment of the present invention is shown. Figure 1 ;

[0034] Figure 8 A cross-sectional schematic diagram of the shock-absorbing and speed-boosting hydraulic pressurizer in an embodiment of the present invention is shown. Figure 2 ;

[0035] Figure 9 A cross-sectional schematic diagram of the shock-absorbing and speed-boosting hydraulic pressurizer in an embodiment of the present invention is shown. Figure 3 ;

[0036] Figure 10 A cross-sectional schematic diagram of the shock-absorbing and speed-boosting hydraulic pressurizer in an embodiment of the present invention is shown. Figure 4 ;

[0037] Figure 11 A schematic diagram of the key block and keyway in an embodiment of the present invention is shown.

[0038] In the diagram, 1. Inner pipe; 101. Upper pipe; 102. Connecting fitting; 1021. First connecting pipe; 1022. Second connecting pipe; 103. Lower pipe; 2. Outer pipe; 201. Upper connector; 202. Connecting pipe body; 2021. First end pipe; 2022. Connecting pipe; 2023. Second end pipe; 3. Piston ring; 301. First piston; 302. Second piston; 4. Sealing ring; 401. First sealing part; 402. 5. Second sealing part; 6. Through hole; 7. Second through hole; 8. Second turntable; 9. Drive component; 10. Guide plate; 11. Connecting shaft; 12. Guide hole; 13. Key block; 14. First key block; 15. Second key block; 16. Keyway; 17. First keyway; 18. Second keyway; 19. Disc spring assembly; 20. Disc; 21. Annular cavity. Detailed Implementation

[0039] The following description provides many different embodiments or examples for implementing various features of the invention. The elements and arrangements described in the specific examples below are only for concise expression of the invention and are merely examples, not intended to limit the invention.

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] This invention provides a shock-absorbing and speed-increasing hydraulic pressurizer. Figure 1 A schematic diagram of a shock-absorbing and speed-boosting hydraulic pressurizer according to an embodiment of the present invention is shown. Figure 1 The shock-absorbing and speed-increasing hydraulic pressurizer includes: an inner tube 1 and an outer tube 2 that are slidably connected. The inner wall of the outer tube 2 is provided with an annular cavity 15. A piston ring 3 is provided in the annular cavity 15. The outer wall of the inner tube 1 is provided with a sealing ring 4 corresponding to the piston ring 3. A compression cavity is formed between the piston ring 3 and the sealing ring 4. The side wall of the inner tube 1 is provided with a through hole 5 that connects the inner cavity of the inner tube 1 with the compression cavity.

[0042] The inner tube 1 is coaxially mounted with a first turntable 6 and a second turntable 7. The first turntable 6 and the second turntable 7 are attached to each other and located downstream of the through hole 5. Both the first turntable 6 and the second turntable 7 are provided with through holes 8 arranged in opposite positions. The first turntable 6 is rotatably sleeved with the inner tube 1, and the second turntable 7 is fixedly sleeved with the inner cavity of the inner tube 1.

[0043] The inner tube 1 is equipped with a driving component 9 that is connected to the first turntable 6. The driving component 9 drives the first turntable 6 to rotate so that the inner tube 1 forms a periodic blockage.

[0044] In actual use, the outer tube 2 is assembled at its head end to the drill string, and the inner tube 1 is assembled at its tail end to the drill bit. When the drilling fluid is transferred to the inner cavity of the inner tube 1 through the drill string, the drive unit 9 is activated to drive the first rotary table 6 to rotate at high speed. Since the second rotary table 7 is fixedly sleeved with the inner cavity of the inner tube 1, during the rotation of the first rotary table 6, the through hole 8 on the first rotary table 6 and the through hole 8 on the second rotary table 7 form periodic connections. When the through hole 8 on the first rotary table 6 and the through hole 8 on the second rotary table 7 are misaligned, they block the inner cavity of the inner tube 1, preventing the drilling fluid from continuing to flow and causing a sudden increase in the hydraulic pressure of the drilling fluid within the inner cavity. This increases the hydraulic pressure of the drilling fluid and drives it through the through hole 5 into the compression cavity, increasing the distance between the sealing ring 4 and the piston ring 3, thereby allowing the inner tube 1 to... The drill bit is pushed downwards to achieve a pressurization effect. When the through hole 8 on the first turntable 6 is aligned with the through hole 8 on the second turntable 7, the drilling fluid flows through the through hole 8 to the tail end of the inner tube 1. The hydraulic pressure of the drilling fluid in the inner tube 1 suddenly decreases, and the drilling fluid is driven to flow back from the compression cavity to the inner tube 1 cavity through the through hole 5. This reduces the distance between the sealing ring 4 and the piston ring 3, thereby causing the inner tube 1 to exert an upward pulling force on the drill bit, achieving a recovery effect. Repeating the above process creates a pulsed pressure drop.

[0045] It should be noted that pressure drag refers to the inability of the drill string to effectively transmit drilling pressure (or the force exerted by the drill bit) to the drill bit during drilling, due to obstruction from the wellbore, formation, or drill cuttings. Drill skipping refers to the intermittent jumping or vibration of the drill bit during drilling, caused by the influence of formation or bottom hole conditions, manifested as abnormal fluctuations in drilling pressure and rotation speed.

[0046] This application, through the combined action of the first rotary table 6 and the second rotary table 7, creates a periodic blockage within the inner tube 1, allowing the liquid medium to periodically perform work on the compressed cavity. This provides a constant pressure to the inner tube 1 with low pressure loss, driving the inner tube 1 to push the drill bit in telescopic motion, achieving a constant pressure pulse and improving drilling efficiency. Furthermore, this process improves the pressurization method after the drill bit, eliminating the need for thrust from the drill string and effectively solving the problems of pressure buildup and drill string skipping during drilling.

[0047] In this embodiment, the driving component 9 includes a coaxially arranged guide disk 901 and a connecting shaft 902, with the outer wall of the guide disk 901 rotatably sleeved with the inner wall of the inner tube 1; Figure 3 and Figure 4In the example shown, the guide plate 901 is located upstream of the first turntable 6. One end of the guide plate 901 is connected to one end of the connecting shaft 902, and the other end of the connecting shaft 902 is connected to the first turntable 6. The guide plate 901 and the first turntable 6 are arranged at intervals through the connecting shaft 902.

[0048] The guide plate 901 has several guide holes 10 arranged in a circular array, adopting a radial structure. The guide holes 10 are spiral about the axis of the guide plate 901. During the process of the liquid medium flowing from the first end to the last end of the inner tube 1, the liquid medium passes through the guide holes 10. Based on the spiral structure of the guide holes 10, the guide holes 10 convert the axial force of the liquid medium into the rotation driving force of the guide plate 901, thereby driving the guide plate 901, the connecting shaft 902, and the first turntable 6 to rotate synchronously, realizing the operation requirement of driving the first turntable 6 to rotate relative to the second turntable 7. In this embodiment, the combination structure of the guide plate 901 and the connecting shaft 902 is adopted, which does not require the addition of additional equipment such as motors. The driving force is directly obtained from the liquid medium, which simplifies the structure of the device and improves the practicality of the device.

[0049] Furthermore, it should be noted that although the above description uses the example of the guide plate 901 being located upstream of the first turntable 6 as an example, the present invention is not limited to this. The guide plate 901 can also be located downstream of the first turntable 6, as long as the connecting shaft 902 passes through the second turntable 7. In this embodiment, the cross-section of the guide hole 10 is an elongated ellipse, but it can also be rectangular, rhomboid, etc. Those skilled in the art can consider the principles of the present invention and practical applications, and any design that achieves the principles of the present invention is acceptable.

[0050] Meanwhile, in order to further improve the structural stability of the first turntable 6 and the second turntable 7, the through hole 8 includes several holes arranged in a circumferential array around the axis of the inner tube 1. For example, refer to Figure 5 The cross-section of the hole adopts an arc-shaped structure, and there are three holes. The included angle between the centers of the holes is 60°, and the included angle between the centers of adjacent holes is also 60°. The limitation on the cross-section of the holes ensures the flow rate of the liquid medium in the through hole 8.

[0051] in, Figure 5 A schematic diagram of the second turntable in an embodiment of the present invention is shown; in Figure 6 The example shown illustrates a top view of the first turntable 6 and the second turntable 7, revealing three relative states of the first turntable 6 and the second turntable 7.

[0052] Figure a shows that the through holes 8 of the first turntable 6 and the second turntable 7 are fully connected and in a fully open state;

[0053] Figure b shows that only half of the through hole 8 of the first turntable 6 and the through hole 8 of the second turntable 7 are connected, and the two are in a semi-open state.

[0054] Figure c shows that the through holes 8 of the first turntable 6 and the second turntable 7 are completely misaligned and in a closed state.

[0055] The fully open state, the semi-open state, and the closed state appear in a cycle, which causes the inner cavity of the inner tube 1 to be periodically blocked, and then the liquid medium periodically pressurizes the compressed cavity, thereby periodically pressurizing the drill bit.

[0056] refer to Figure 2 and Figure 3 To improve the flexibility of the device in this application, the device is disassembled. The inner pipe 1 includes an upper connecting pipe 101, a connecting fitting 102, and a lower connecting pipe 103.

[0057] The upper pipe 101, connecting fitting 102, and lower pipe 103 are sequentially connected by threads at their first and second ends.

[0058] The outer wall of the upper connecting pipe 101 is slidably and sealingly connected to the inner wall of the first end of the outer pipe 2, and the outer wall of the first end of the lower connecting pipe 103 is slidably and sealingly connected to the inner wall of the tail end of the outer pipe 2.

[0059] Correspondingly, the outer tube 2 includes an upper connector 201 and a connecting tube body 202;

[0060] The inner wall of the upper connector 201 is slidably sleeved with the outer wall of the upper pipe 101, the outer wall of the tail end of the upper connector 201 is slidably sleeved with the inner wall of the head end of the connecting pipe 202, and the inner wall of the tail end of the connecting pipe 202 is slidably sleeved with the outer wall of the lower pipe 103.

[0061] Among them, reference Figure 10 The outer wall of the first end of the lower tube 103 and the inner wall of the last end of the outer tube 2 are respectively provided with a plurality of matching key blocks 11 and a plurality of keyways 12 in a circumferential array; Reference Figure 9 The outer wall of the tail end of the upper connector 201 and the inner wall of the head end of the connecting pipe 202 are respectively provided with a number of matching key blocks 11 and a number of keyways 12 in a circumferential array.

[0062] By using several compatible key blocks 11 and keyways 12, the stability of the connection between the outer wall of the first end of the lower pipe 103 and the inner wall of the tail end of the outer pipe 2, and the outer wall of the tail end of the upper connector 201 and the inner wall of the first end of the connecting pipe 202 is improved.

[0063] It should be further explained that stick-slip phenomenon on the drilling rig is a dynamic mechanical anomaly during the drilling process, typically manifesting as an unstable state of alternating "sticking" and "slipping" as the drill string or drill bit moves within the well. It is a typical vibration problem in drilling engineering, significantly affecting drilling efficiency, increasing equipment wear, and even leading to complex downhole accidents.

[0064] Correspondingly, in order to reduce stick-slip during the drilling process. Figure 11 In the example shown, the key block 11 includes a first key block 1101 and a second key block 1102 that operate sequentially. The width of the first key block 1101 is smaller than the width of the second key block 1102, and the connecting surface of the first key block 1101 and the second key block 1102 is beveled. Correspondingly, a first keyway 1201 and a second keyway 1202 are formed between adjacent key blocks 11, which are the first key block 1101 and the second key block 1102. The width of the first keyway 1201 is larger than the width of the second keyway 1202, and the connecting surface of the first keyway 1201 and the second keyway 1202 is also beveled.

[0065] Based on the structural design with width decreasing from large to small, when the first key block 1101 is located in the first keyway 1201, it will obtain sufficient margin, so that the first key block 1101 can achieve a certain degree of positional offset within the first keyway 1201. Under the action of the drill rod torsional force, the drill table has a left-right swinging effect, thereby solving the stick-slip phenomenon of the drill table. At the same time, as the first key block 1101 is gradually inserted into the second keyway 1202, the position of the first key block 1101 is gradually corrected, ensuring the stability of the connection between the inner tube 1 and the outer tube 2.

[0066] At the same time, the beveled transition improves the smoothness of the connection process between the first key block 1101 and the second key block 1102 and the keyway 12.

[0067] In this embodiment, reference Figure 2 It also includes a disc spring assembly 13 and discs 14. A compression cavity is formed between the tail end of the piston ring 3 and the head end of the sealing ring 4. One end of several discs 14 is installed at the head end of the piston ring 3, and the other end of several discs 14 is connected to the tail end of the upper connector 201 through the disc spring assembly 13. The disc spring assembly 13 is fitted onto the outer ring of the inner tube 1 and placed in the annular cavity 15.

[0068] It should be noted that, in order to improve the effectiveness of the disc spring assembly 13, the disc spring assembly 13 adopts a hybrid installation method of stacking two or more disc springs, and during the assembly process, the side of the disc spring with greater force is selected to face both ends, thereby improving the elasticity of the spring and ensuring a better shock absorption effect.

[0069] Correspondingly, by adding several discs 14 between the tail end of the disc spring assembly 13 and the head end of the piston ring 3, the installation distance of the disc spring assembly 13 can be adjusted by adjusting the number and specifications of the discs 14 during the assembly process.

[0070] Since pulsed pressure drop is used in this embodiment, vibration can be effectively absorbed based on the disc spring assembly 13, thereby reducing the vibration of the drill bit. Furthermore, the release of the disc spring assembly 13 can also produce an axial impact effect on the drill bit, improving the rock breaking effect when the drill bit encounters hard strata.

[0071] exist Figure 7 and Figure 8 In the example shown, the inner wall of the first end of the piston ring 3 is slidably sealed to the outer wall of the inner tube 1, and the inner wall of the tail end of the piston ring 3 and the outer wall of the inner tube 1 are respectively provided with matching inserts and slots. The inserts and slots extend along the axial direction of the piston ring 3, thereby avoiding loosening caused by the vibration of the tube column and ensuring the overall safety of the tool.

[0072] In addition, the guide plate 901, connecting shaft 902, first turntable 6, and second turntable 7 are all made of hard alloy to improve erosion resistance and wear resistance. The inner wall of the lower pipe 103 is made of clad alloy to improve wear resistance.

[0073] Among them, reference Figure 2 and Figure 3 The piston ring 3 includes a first piston 301 and a second piston 302, the sealing ring 4 includes a first sealing part 401 and a second sealing part 402, and the through hole 5 includes a first through hole 501 and a second through hole 502.

[0074] The connecting pipe fitting 102 includes a first connecting pipe 1021 and a second connecting pipe 1022 with threaded connections at both ends. The first connecting pipe 1021 and the second connecting pipe 1022 are respectively provided with a first sealing part 401 and a second sealing part 402.

[0075] The connecting tube 202 includes a first end tube 2021, a connecting tube 2022, and a second end tube 2023 that are sequentially sleeved. The inner wall of the tail end of the first end tube 2021 is threadedly sleeved with the outer wall of the head end of the first piston 301. The inner wall of the head end of the connecting tube 2022 is threadedly sleeved with the outer wall of the tail end of the first piston 301. The inner wall of the tail end of the connecting tube 2022 is threadedly sleeved with the outer wall of the head end of the second piston 302. The inner wall of the head end of the second end tube 2023 is threadedly sleeved with the outer wall of the tail end of the second piston 302.

[0076] The first piston 301, the second piston 302, the first sealing part 401 and the second sealing part 402 together form two compression cavities. Correspondingly, the side walls of the first connecting pipe 1021 and the second connecting pipe 1022 are provided with a first through hole 501 and a second through hole 502, thus forming a two-stage piston system.

[0077] Although a two-stage piston system has been used as an example here, the number of first connecting pipe 1021, second connecting pipe 1022, and connecting pipe 2022 is not limited to this. It should be noted that the number of connecting pipes needs to be one more than the number of connecting pipes 2022. Each connecting pipe corresponds to one sealing part, and each connecting pipe 2022 corresponds to two pistons. Those skilled in the art can increase the number of pistons in the system based on actual application conditions to improve the force applied by the drill bit.

[0078] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0079] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A shock-absorbing and speed-increasing hydraulic pressurizer for connecting drill rods and drill bits, characterized in that, include: The inner tube (1) and outer tube (2) are slidably connected. The inner wall of the outer tube (2) is provided with an annular cavity (15). A piston ring (3) is provided in the annular cavity (15). A sealing ring (4) is provided on the outer wall of the inner tube (1) corresponding to the piston ring (3). A compression cavity is formed between the piston ring (3) and the sealing ring (4). A through hole (5) is provided on the side wall of the inner tube (1) to connect the inner cavity of the inner tube (1) and the compression cavity. The inner tube (1) is coaxially mounted with a first turntable (6) and a second turntable (7). The first turntable (6) and the second turntable (7) are attached to each other and located downstream of the through hole (5). Both the first turntable (6) and the second turntable (7) are provided with through holes (8) arranged in opposite positions. The first turntable (6) is rotatably sleeved with the inner tube (1), and the second turntable (7) is fixedly sleeved with the inner tube (1). The inner tube (1) is equipped with a drive component (9) that is connected to the first turntable (6) for transmission. The drive component (9) drives the first turntable (6) to rotate so that the inner tube (1) forms a periodic blockage.

2. The shock-absorbing and speed-increasing hydraulic pressurizer according to claim 1, characterized in that, The driving component (9) includes a coaxially arranged guide plate (901) and a connecting shaft (902). The outer wall of the guide plate (901) is rotatably sleeved with the inner wall of the inner tube (1). The guide plate (901) is provided with a plurality of guide holes (10) arranged in a circular array. The guide holes (10) are spiral about the axis of the guide plate (901). One end of the guide plate (901) is connected to one end of the connecting shaft (902), and the other end of the connecting shaft (902) is connected to the first turntable (6).

3. The shock-absorbing and speed-increasing hydraulic pressurizer according to claim 1, characterized in that, The through hole (8) includes a number of holes arranged in a circular array around the axis of the inner tube (1).

4. The shock-absorbing and speed-increasing hydraulic pressurizer according to claim 1, characterized in that, The inner tube (1) includes an upper pipe (101), a connecting pipe fitting (102), and a lower pipe (103) that are threaded together in sequence; The outer wall of the upper connecting pipe (101) is slidably sealed to the inner wall of the first end of the outer pipe (2), and the outer wall of the first end of the lower connecting pipe (103) is slidably sealed to the inner wall of the tail end of the outer pipe (2).

5. The shock-absorbing and speed-increasing hydraulic pressurizer according to claim 4, characterized in that, The outer tube (2) includes an upper connector (201) and a connecting tube body (202); The inner wall of the upper connector (201) is slidably sleeved with the outer wall of the upper pipe (101), the outer wall of the tail end of the upper connector (201) is slidably sleeved with the inner wall of the head end of the connecting pipe (202), and the inner wall of the tail end of the connecting pipe (202) is slidably sleeved with the outer wall of the lower pipe (103).

6. The shock-absorbing and speed-increasing hydraulic pressurizer according to claim 5, characterized in that, The outer wall of the first end of the lower connector (103) and the inner wall of the tail end of the outer pipe (2), and the outer wall of the tail end of the upper connector (201) and the inner wall of the first end of the connecting pipe (202) are respectively arranged in a circumferential array with a number of matching key blocks (11) and a number of keyways (12).

7. The shock-absorbing and speed-increasing hydraulic pressurizer according to claim 6, characterized in that, The key block (11) includes a first key block (1101) and a second key block (1102) that operate sequentially. The width of the first key block (1101) is smaller than the width of the second key block (1102), and the connecting surface of the first key block (1101) and the second key block (1102) is beveled. A keyway (12) is formed between adjacent key blocks (11).

8. The shock-absorbing and speed-increasing hydraulic pressurizer according to claim 5, characterized in that, It also includes a disc spring assembly (13) and discs (14). A compression cavity is formed between the tail end of the piston ring (3) and the head end of the sealing ring (4). Several discs (14) are installed at the head end of the piston ring (3), and the other ends of the discs (14) are connected to the tail end of the connector (201) through the disc spring assembly (13).

9. The shock-absorbing and speed-increasing hydraulic pressurizer according to claim 1, characterized in that, The inner wall of the first end of the piston ring (3) is slidably sealed to the outer wall of the inner tube (1). The inner wall of the tail end of the piston ring (3) and the outer wall of the inner tube (1) are respectively provided with matching inserts and slots. The inserts and slots extend along the axial direction of the piston ring (3).

10. The shock-absorbing and speed-increasing hydraulic pressurizer according to any one of claims 5-8, characterized in that, The piston ring component (3) includes a first piston (301) and a second piston (302), the sealing ring part (4) includes a first sealing part (401) and a second sealing part (402), and the through hole (5) includes a first through hole (501) and a second through hole (502). The connecting pipe fitting (102) includes a first connecting pipe (1021) and a second connecting pipe (1022) with threaded connections at both ends. The first connecting pipe (1021) and the second connecting pipe (1022) are respectively provided with a first sealing part (401) and a second sealing part (402). The connecting tube (202) includes a first end tube (2021), a connecting tube (2022), and a second end tube (2023) that are sequentially sleeved. The inner wall of the tail end of the first end tube (2021) is threadedly sleeved with the outer wall of the head end of the first piston (301). The inner wall of the head end of the connecting tube (2022) is threadedly sleeved with the outer wall of the tail end of the first piston (301). The inner wall of the tail end of the connecting tube (2022) is threadedly sleeved with the outer wall of the head end of the second piston (302). The inner wall of the head end of the second end tube (2023) is threadedly sleeved with the outer wall of the tail end of the second piston (302).

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