Double-vibration-mechanism switching type hydraulic oscillator

Abstract

The invention discloses a double-vibration-mechanism switching type hydraulic oscillator. The double-vibration-mechanism switching type hydraulic oscillator comprises a jet type pulse generator, an oscillation short section, a switching short section, a turbo type pulse generator and a valve group, the oscillation short section comprises an oscillation mandrel, a belleville spring group, a resistance reducer, and an upper transmission short section, a connecting sleeve and a lower transmission short section which are connected in sequence; the upper transmission short section is connected with the lower transmission short section through a connecting sleeve; the switching nipple comprises an upper shell, a ball receiving opening, a spring, and a shunting head and a fixer which are arranged in the upper shell; the ball receiving opening and the spring are sequentially installed in the flow dividing head. The lower end of the shunting head is connected with the fixer; a bypass hole is formed in the side wall of the shunting head; and the upper end of the jet-type pulse generator is connected with the lower end of the fixer. Jet flow is achieved, multiple sets of turbines serve as power sources, compared with a traditional mechanical hydraulic oscillator, work is more stable, the application cost is low, long-time high-speed rotation is guaranteed, the speed increasing effect is better than that of an existing rotary guiding rotating tool, and the service life is longer.

Description

Technical Field

[0001] The invention relates to a double vibration mechanism switching type hydraulic oscillator, belonging to the technical field of oil and natural gas drilling. Background Art

[0002] With the continuous deepening of oil field development and the advancement of drilling technology, oil drilling has gradually developed towards extended reach wells and multi-branch horizontal wells. However, when drilling horizontal wells, problems such as increased friction and pressure support will occur, which seriously affect the mechanical speed. Especially in sliding drilling, due to the excessive friction of the drill pipe, the drilling pressure cannot be effectively transmitted to the drill bit, the rock breaking efficiency is reduced, the drilling cycle is extended, the operating efficiency is reduced, and the well construction cost is greatly increased. The development and application of a series of friction and drag reduction tools such as rotary percussion drilling tools, hydraulic impactors, and hydraulic oscillators are of great significance to speeding up and increasing efficiency. As an efficient friction and drag reduction tool, hydraulic oscillators have been widely studied and tested.

[0003] The existing conventional hydraulic oscillator design is only for a certain vibration mechanism, and there is no hydraulic oscillator design that integrates or switches multiple vibration modes. During the drilling process, it is often encountered that a variety of different formations appear alternately, such as soft formations in the upper part, hard formations in the middle part, and very abrasive formations in the lower part. After integrating multiple vibration generation mechanisms, the vibration modes can be flexibly switched or combined according to the hardness, abrasiveness and other characteristics of different formations. For soft formations, a suitable mechanism can be enabled to generate relatively soft, low-frequency vibrations to assist drilling. When it comes to hard formations, it can be switched to a mechanism that can generate high-frequency, high-intensity vibrations to break the rock. This can more efficiently cope with complex formation changes, reduce the trouble of frequently pulling up and down the drill to replace different oscillators, and improve drilling efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a dual vibration mechanism switching hydraulic oscillator in view of the problems existing in the prior art.

[0005] The technical solution provided by the present invention to solve the above technical problems is: a dual vibration mechanism switching hydraulic oscillator, comprising a jet pulse generator and an oscillation short section, a switching short section, a turbine pulse generator, and a valve group connected in sequence;

[0006] The oscillation short section comprises an oscillation mandrel, a disc spring group, a drag reducer, and an upper transmission short section, a connecting sleeve, and a lower transmission short section connected in sequence; the upper transmission short section is connected to the lower transmission short section through the connecting sleeve; the disc spring group and the drag reducer are sequentially installed on the lower end of the oscillation mandrel; the oscillation mandrel is installed in the upper transmission short section, the connecting sleeve, and the lower transmission short section;

[0007] The switching short section includes an upper shell, a ball receiving port, a spring, a flow divider head and a holder installed in the upper shell; the ball receiving port and the spring are sequentially installed in the flow divider head; the lower end of the flow divider head is connected to the holder; the side wall of the flow divider head is provided with a bypass hole;

[0008] The upper end of the jet pulse generator is connected to the lower end of the fixer.

[0009] A further technical solution is that a rubber sealing ring is provided between the drag reducer and the inner wall of the lower transmission short section.

[0010] A further technical solution is that the jet pulse generator includes a jet housing, a jet element, a cylinder housing, a cylinder, a piston, a cylinder head, and a throttle; the jet element is sequentially installed in the jet housing, the cylinder, the cylinder head, and the throttle are sequentially installed in the cylinder housing, the piston is installed in the cylinder, and its lower end passes through the cylinder head and extends into the throttle; the upper end of the jet housing is connected to the lower end of the fixer, and the upper end of the cylinder housing is connected to the lower end of the jet housing.

[0011] A further technical solution is that the jet element includes two nozzle blocks, two feedback blocks, a wedge tip, an upper cover plate, and a lower base plate; the two nozzle blocks, the two feedback blocks, and the wedge tip are distributed between the upper cover plate and the lower base plate and pre-tightened by bolts; the wedge tip is located between the two feedback blocks, the two feedback blocks are symmetrically distributed between the two nozzle blocks, and the two nozzle blocks are relatively arranged between the upper cover plate and the lower base plate.

[0012] A further technical solution is that the turbine pulse generator comprises a turbine group, a main shaft and a compression sleeve, a middle shell, and a middle flexible short section connected in sequence; a flow divider is installed in the compression sleeve; the turbine group is installed on the main shaft; the main shaft is installed in the compression sleeve, the middle shell, and the middle flexible short section, and its upper end is installed in the lower end of the flow divider;

[0013] The valve group includes a moving valve group, a fixed valve group, and a lower shell and a lower flexible short section connected in sequence; the upper end of the moving valve group is connected to the lower end of the main shaft, and the fixed valve group is installed on the upper end of the lower flexible short section.

[0014] A further technical solution is that an upper centering bearing and a thrust bearing group are sequentially mounted on the main shaft, and the turbine group is located between the upper centering bearing and the thrust bearing group.

[0015] A further technical solution is that the upper straightening bearing is located in the upper end of the inner cavity of the middle shell, and the thrust bearing group is located in the upper end of the inner cavity of the middle flexible short section.

[0016] A further technical solution is that a lower centering bearing is provided in the lower shell body, and the movable valve group is installed in the lower centering bearing.

[0017] A further technical solution is that the fixture and the jet housing are connected by threads.

[0018] The present invention has the following beneficial effects:

[0019] 1. Traditional hydraulic oscillators have low adaptability to complex terrain changes. The present invention realizes the switching between the jet hydraulic oscillator and the turbine hydraulic oscillator. Compared with the traditional oscillator with a single vibration mechanism, it can adapt to more complex formation changes;

[0020] 2. The present invention is applicable to shallow well operations as well as deep well, ultra-deep well and high-temperature and high-pressure well drilling operations. It can maintain the drilling tool to work well in a high-friction environment, while reducing the trouble of frequently tripping and replacing different oscillators, thereby improving drilling efficiency;

[0021] 3. The present invention realizes jet and multiple turbines as power sources. Compared with the traditional mechanical hydraulic oscillator, it works more stably, has lower application cost, ensures long-term high-speed rotation, has better speed-up effect than the current rotary guide turntable, and has a longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 It is a detailed schematic diagram of the present invention;

[0024] Figure 3 It is a structural schematic diagram of the jet pulse generator and the switching short section in the present invention;

[0025] Figure 4 It is a three-dimensional schematic diagram of the lower flexible short section;

[0026] Figure 5 It is a cross-sectional view of the lower flexible short section;

[0027] Figure 6 It is a three-dimensional schematic diagram of the moving valve group;

[0028] Figure 7 It is a three-dimensional schematic diagram of the fixed valve group;

[0029] Figure 8 A three-dimensional schematic diagram of a jet pulse generator and a switching short section;

[0030] Fig. 9 It is a cross-sectional view of the jet pulse generator and the switching short section;

[0031] Fig.10 It is a three-dimensional schematic diagram of the splitter head;

[0032] Fig.11is a three-dimensional schematic diagram of the ball receiving port;

[0033] Fig.12 is a three-dimensional schematic diagram of the fixator;

[0034] Fig.13 is a three-dimensional schematic diagram of the jet shell;

[0035] Fig.14 is a three-dimensional schematic diagram of the cylinder housing;

[0036] Fig.15 is a three-dimensional schematic diagram of the cylinder;

[0037] Fig.16 is a three-dimensional schematic diagram of the piston;

[0038] Fig.17 is a three-dimensional schematic diagram of the end cap;

[0039] Fig.18 is a three-dimensional schematic diagram of the throttle;

[0040] Fig.19 is a three-dimensional schematic diagram of the jet element;

[0041] Fig. 20 A three-dimensional schematic diagram of a turbine pulse generator. DETAILED DESCRIPTION

[0042] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0046] like Figure 1-Figure 20 As shown, a dual vibration mechanism switching hydraulic oscillator provided by the present invention comprises a jet pulse generator 3 and an oscillation short section 1, a switching short section 2, a turbine pulse generator 4, and a valve group 5 connected in sequence;

[0047] The oscillation short section 1 comprises an oscillation mandrel 11, a disc spring group 15, a drag reducer 16, and an upper transmission short section 12, a connecting sleeve 13, and a lower transmission short section 14 connected in sequence; the upper transmission short section 12 is connected to the lower transmission short section 14 through the connecting sleeve 13; the disc spring group 15 and the drag reducer 16 are sequentially mounted on the lower end of the oscillation mandrel 11; the oscillation mandrel 11 is mounted in the upper transmission short section 12, the connecting sleeve 13, and the lower transmission short section 14;

[0048] The side wall of the diverter head 21 is provided with a bypass hole; the switching short section 2 comprises an upper shell 25, a ball receiving port 22, a spring 23, a diverter head 21 installed in the upper shell 25, and a holder 24; the ball receiving port 22 and the spring 23 are sequentially installed in the diverter head 21, and due to the action of the spring 23, the ball receiving port 22 can reciprocate in the diverter head 21 to cover or open the bypass hole; the lower end of the diverter head 21 is connected to the holder 24;

[0049] The upper end of the jet pulse generator 3 is connected to the lower end of the fixture 24; the drilling fluid in the fixture 24 enters the jet pulse generator 3 to generate periodically changing high-voltage pulses.

[0050] In this embodiment, the oscillating mandrel 11 has a flow channel, and the drilling fluid enters the inner cavity of the lower transmission short section 14 along the flow channel provided in the oscillating mandrel 11, and then enters the switching short section 2;

[0051] After the drilling fluid enters the switching sub 2, when the jet pulse generator 3 is required to generate a pulse, the ball receiving port 22 blocks the bypass hole of the diverter head 21 due to the elastic force of the spring 23, and then the drilling fluid passes through the diverter head 21, the ball receiving port 22, and the flow channel of the fixture 24 in sequence, and enters the jet pulse generator 3, and the jet pulse generator 3 then generates a periodically changing high-voltage pulse;

[0052] When the jet generator 3 or the turbine generator 4 works to generate a periodically changing high-voltage pulse, the drag reducer 16 is subjected to the axial high-voltage pulse, which squeezes the disc spring group 15, the disc spring is squeezed and deformed, and the oscillation mandrel 11 moves outward; the high-voltage pulse is reduced, the disc spring is extended, squeezing the drag reducer 16, and the oscillation mandrel 11 is reset, completing one oscillation;

[0053] The drilling fluid in the jet pulse generator then flows out through the turbine pulse generator 4 and the valve group 5 in sequence.

[0054] like Figure 2 As shown, in this embodiment, the drag reducer 16 needs to be subjected to axial high-voltage pulse, so a preferred implementation is that a rubber sealing ring is provided between the drag reducer 16 and the inner wall of the lower transmission short section 14, thereby improving the sealing effect between the drag reducer 16 and the inner wall of the lower transmission short section 14.

[0055] like Figure 3 As shown, in this embodiment, a specific implementation of the jet pulse generator 3 is that the jet pulse generator 3 includes a jet housing 31, a jet element, a cylinder housing 35, a cylinder 36, a piston 37, a cylinder head 38, and a throttle 39; the jet element is sequentially installed in the jet housing 31, the cylinder 36, the cylinder head 38, and the throttle 39 are sequentially installed in the cylinder housing 35, the piston 37 is installed in the cylinder 36, and its lower end passes through the cylinder head 38 and extends to the throttle 39; the upper end of the jet housing 31 is connected to the lower end of the fixer 24, and the upper end of the cylinder housing 35 is connected to the lower end of the jet housing 31.

[0056] The jet element includes two nozzle blocks 32, two feedback blocks 33, a wedge tip 34, an upper cover plate 310, and a lower base plate 311. The two nozzle blocks 32, the two feedback blocks 33, and the wedge tip 34 are distributed between the upper cover plate 310 and the lower base plate 311 and are pre-tightened by bolts; the wedge tip 34 is located between the two feedback blocks 33, the two feedback blocks 33 are symmetrically distributed between the two nozzle blocks 32, and the two nozzle blocks 32 are relatively arranged between the upper cover plate 310 and the lower base plate 311.

[0057] The specific working process of the jet pulse generator 3 is as follows: the drilling fluid flows from the fixture 24 into the nozzle block 32. At the nozzle block 32, the fluid is accelerated to flow out from the jet port to form a jet. The jet impacts the wedge tip 34. The flow velocity at the center of the jet is faster, and the flow velocity near the feedback block 33 is slower. The jet forms a low-pressure vortex between the upper and lower side walls. Due to the pressure disturbance of the upper and lower chambers, the jet attaches to the wall and the side wall with lower pressure. If it attaches to the wall to the upper chamber, the fluid enters the upper chamber of the cylinder 36 at this time. The pressure of the upper chamber of the cylinder 36 surges, pushing the piston 37 downward. At the same time, the pressure of the upper chamber feedback flow channel surges, and the upper chamber feedback flow impacts the jet port. The increased pressure in the upper chamber pushes the jet to switch to attach to the wall to the lower chamber. At this time, the pressure of the lower chamber of the cylinder 36 surges, pushing the piston 37 upward, and the lower chamber feedback flow impacts the jet port. The jet switches to attach to the wall again. The above process operates in a cycle, and the piston 37 moves up and down in the cylinder 36 periodically. At the same time, the lower end of the piston 37 cooperates with the throttle port 39 , and the periodic movement of the piston 37 causes the opening size of the throttle port 39 to change periodically, forming a pressure pulse in the axial direction of the oscillation short section 1 .

[0058] like Figure 2 As shown, a specific implementation of the turbine pulse generator 4 in this embodiment is, including a turbine group 45, a main shaft 46 and a compression sleeve 42, a middle shell 44, and a middle flexible short section 48 connected in sequence; a diverter 41 is installed in the compression sleeve 42; the turbine group 45 is installed on the main shaft 46; the main shaft 46 is installed in the compression sleeve 42, the middle shell 44, and the middle flexible short section 48, and its upper end is installed in the lower end of the diverter 41; the upper end of the movable valve group 51 is connected to the lower end of the main shaft 46, and the main shaft 46 is sequentially equipped with an upper centering bearing 43 and a thrust bearing group 47, the turbine group 45 is located between the upper centering bearing 43 and the thrust bearing group 47, the upper centering bearing 43 is located in the upper end of the inner cavity of the middle shell 44, and the thrust bearing group 47 is located in the upper end of the inner cavity of the middle flexible short section 48;

[0059] The valve group 5 includes a moving valve group 51, a fixed valve group 52, and a lower shell 54 and a lower flexible short section 55 connected in sequence; a lower centering bearing 53 is provided in the lower shell 54, and the moving valve group 51 is installed in the lower centering bearing 53; the upper end of the moving valve group 51 is connected to the main shaft 46, and the fixed valve group 52 is installed on the upper end of the lower flexible short section 55, wherein the lower end surface of the moving valve group 51 contacts the upper end surface of the fixed valve group 52, and a plurality of flow holes are provided on the lower end surface of the moving valve group 51 and the upper end surface of the fixed valve group 52.

[0060] In this embodiment, when the turbine pulse generator 4 is required to generate high-pressure pulses, the switching is performed by switching the short section 2. The specific switching process is as follows: the ball receiving port 22 has a funnel-shaped opening and a through hole at the bottom for the drilling fluid to pass through. The structure is used to receive and fix the projectiles falling from the upper flow channel. The spring 23 is installed at the lower end of the ball receiving port 22. When the projectiles are thrown from the upper side, the projectiles are fixed to the ball receiving port 22, the hydraulic pressure in the diverter head 21 increases, the ball receiving port 22 moves downward, the spring 23 is compressed, and the hanging ring at the bottom of the ball receiving port 22 is fixed to the fixture 24 to achieve vibration switching. At the same time, the drilling fluid enters the upper shell 25 through the bypass hole, that is, the annulus between the upper shell 25 and the diverter head 21 and the jet housing 31, and then enters the turbine pulse generator 4 and the valve group 5.

[0061] The specific process of the turbine pulse generator 4 generating high-pressure pulses is as follows: the drilling fluid enters the diverter 41 of the turbine pulse generator 4, the diverter 41 diverts the drilling fluid to the flow channel in the main shaft 46 and the flow channel in the middle shell 44, the drilling fluid in the middle shell 44 is used to drive the turbine group 45 to generate rotational motion, the turbine group 45 drives the main shaft 46 to rotate at high speed, the main shaft 46 drives the moving valve group 51 to rotate, the flow area between the moving valve group 51 and the fixed valve group 52 changes periodically, the high-pressure pulse is transmitted upward along the main shaft 46, and the high-speed drilling fluid generates periodic axial pulses in the hydraulic oscillator.

[0062] The working principle of the valve group 5 is to change the area of ​​the flow channel by rotating the movable valve group 51. The movable valve group 51 is driven to rotate by the main shaft 46, and the fixed valve group 52 has a regular flow channel. When the movable valve group 51 rotates, its flow channel and the flow channel of the fixed valve group 52 are alternately staggered, resulting in a periodic change in the flow channel area. When staggered, the flow channel area decreases and the fluid pressure increases; when overlapped, the flow channel area increases and the pressure decreases.

[0063] The overall working principle of the present invention is as follows:

[0064] The drilling fluid enters along the flow channel provided in the oscillation mandrel 11. For shallow wells or medium-deep wells, the jet type is used as the vibration mechanism. The bypass hole of the diverter head 21 is blocked by the ball receiving port 22, and the drilling fluid enters the switching short section 2 along the flow channel, and enters the jet generator 3 through the ball receiving port 22 to form a jet, so that the piston 37 moves up and down periodically in the cylinder. The lower end of the piston 37 cooperates with the throttle port 39. The periodic movement of the piston 37 causes the opening size at the throttle port 39 to change periodically, forming a pressure pulse in the axial direction of the oscillation short section 1. The drag reducer 16 is subjected to an axial high-pressure pulse, which squeezes the disc spring group 15, the disc spring is squeezed and deformed, and the oscillation mandrel 11 moves outward; the high-pressure pulse is reduced, the disc spring is extended, the drag reducer 16 is squeezed, and the oscillation mandrel 11 is reset, completing an oscillation.

[0065] For deep wells or ultra-deep wells, in order to overcome the greater friction resistance of the deep formation on the drilling tool, it is necessary to switch the turbine type to the vibration mechanism. The projectile is dropped along the pipeline, and the projectile enters from the oscillating mandrel 11 and the diverter head 21, and is finally fixed to the ball receiving port 22. The projectile will block the passage of the drilling fluid at the ball receiving port 22, and the hydraulic pressure in the ball receiving port 22 increases, the spring 23 is compressed downward, the ball receiving port 22 moves downward, the bypass hole of the diverter head 21 is released and connected, and the drilling fluid enters the flow channel between the diverter head 21 and the upper shell 25, the jet generator is deactivated, and the turbine generator is activated, realizing the switching of the vibration mechanism.

[0066] The drilling fluid passes through the flow channel in the upper shell 25 and the flow divider 41, and a small part enters the flow channel in the main shaft 46. Most of the drilling fluid enters the flow channel in the shell 44 to maintain the high-speed operation of the turbine group 45. The turbine group 45 drives the main shaft 46 to rotate at a high speed, and the main shaft 46 drives the moving valve group 51 to rotate. The flow area between the moving valve group 51 and the fixed valve group 52 changes periodically, and the high-pressure pulse is transmitted upward along the main shaft 46. The high-speed drilling fluid generates periodic axial pulses in the hydraulic oscillator. The periodic pulses are transmitted to the drag reducer 16, and the oscillation short section 1 also generates periodic oscillations.

[0067] The remaining drilling fluid flows along the flow channels in the middle flexible pup joint 48 and the lower flexible pup joint 55 and finally enters the pipeline.

[0068] The above description is not intended to limit the present invention in any form. Although the present invention has been disclosed through the above embodiments, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A dual vibration mechanism switching hydraulic oscillator, characterized in that: It comprises a jet pulse generator (3) and an oscillation short section (1), a switching short section (2), a turbine pulse generator (4), and a valve group (5) which are connected in sequence; The oscillation short section (1) comprises an oscillation mandrel (11), a disc spring group (15), a drag reducer (16), and an upper transmission short section (12), a connecting sleeve (13), and a lower transmission short section (14) which are connected in sequence; the upper transmission short section (12) is connected to the lower transmission short section (14) via the connecting sleeve (13); the disc spring group (15) and the drag reducer (16) are sequentially mounted on the lower end of the oscillation mandrel (11); the oscillation mandrel (11) is mounted in the upper transmission short section (12), the connecting sleeve (13), and the lower transmission short section (14); The switching nipple (2) comprises an upper shell (25), a ball receiving port (22), a spring (23), a flow divider (21) and a holder (24) installed in the upper shell (25); the ball receiving port (22) and the spring (23) are sequentially installed in the flow divider (21); the lower end of the flow divider (21) is connected to the holder (24); and a bypass hole is provided on the side wall of the flow divider (21); The upper end of the jet pulse generator (3) is connected to the lower end of the fixer (24).

2. A dual vibration mechanism switching hydraulic oscillator according to claim 1, characterized in that: A rubber sealing ring is provided between the drag reducer (16) and the inner wall of the lower transmission short section (14).

3. A dual vibration mechanism switching hydraulic oscillator according to claim 1, characterized in that: The jet pulse generator (3) comprises a jet housing (31), a jet element, a cylinder housing (35), a cylinder (36), a piston (37), a cylinder cover (38), and a throttle (39); the jet element is sequentially installed in the jet housing (31); the cylinder (36), the cylinder cover (38), and the throttle (39) are sequentially installed in the cylinder housing (35); the piston (37) is installed in the cylinder (36), and its lower end passes through the cylinder cover (38) and extends into the throttle (39); the upper end of the jet housing (31) is connected to the lower end of the fixer (24), and the upper end of the cylinder housing (35) is connected to the lower end of the jet housing (31).

4. A dual vibration mechanism switching hydraulic oscillator according to claim 3, characterized in that: The jet element comprises two nozzle blocks (32), two feedback blocks (33), a wedge tip (34), an upper cover plate (310), and a lower base plate (311); the two nozzle blocks (32), the two feedback blocks (33), and the wedge tip (34) are distributed between the upper cover plate (310) and the lower base plate (311) and are pre-tightened by bolts; the wedge tip (34) is located between the two feedback blocks (33); the two feedback blocks (33) are symmetrically distributed between the two nozzle blocks (32); and the two nozzle blocks (32) are relatively arranged between the upper cover plate (310) and the lower base plate (311).

5. The dual vibration mechanism switching hydraulic oscillator according to claim 3 is characterized in that: The turbine pulse generator (4) comprises a turbine group (45), a main shaft (46), and a compression sleeve (42), a middle shell (44), and a middle flexible short section (48) connected in sequence; a flow divider (41) is installed in the compression sleeve (42); the turbine group (45) is installed on the main shaft (46); the main shaft (46) is installed in the compression sleeve (42), the middle shell (44), and the middle flexible short section (48), and its upper end is installed in the lower end of the flow divider (41); The valve group (5) comprises a movable valve group (51), a fixed valve group (52), a lower shell (54) and a lower flexible short section (55) which are connected in sequence; the upper end of the movable valve group (51) is connected to the lower end of the main shaft (46), and the fixed valve group (52) is installed on the upper end of the lower flexible short section (55).

6. A dual vibration mechanism switching hydraulic oscillator according to claim 5, characterized in that: The main shaft (46) is provided with an upper centering bearing (43) and a thrust bearing group (47) in sequence, and the turbine group (45) is located between the upper centering bearing (43) and the thrust bearing group (47).

7. A dual vibration mechanism switching hydraulic oscillator according to claim 6, characterized in that: The upper straightening bearing (43) is located in the upper end of the inner cavity of the middle housing (44), and the thrust bearing group (47) is located in the upper end of the inner cavity of the middle flexible short section (48).

8. The dual vibration mechanism switching hydraulic oscillator according to claim 1, characterized in that: A lower centering bearing (53) is provided in the lower housing (54), and the movable valve group (51) is installed in the lower centering bearing (53).

9. A dual vibration mechanism switching hydraulic oscillator according to claim 3, characterized in that: The fixer (24) and the jet housing (31) are connected by threads.

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