A dual-vibration mechanism switching type hydraulic oscillator

Abstract

The present invention discloses a double-vibration mechanism switching type hydraulic oscillator, which comprises a jet-type pulse generator and an oscillation short section, a switching short section, a turbine-type pulse generator, and a valve group that are connected in sequence; the oscillation short section includes an oscillation mandrel, a disc spring group, a damper, and an upper transmission short section, a connecting sleeve, and a lower transmission short section that are connected in sequence; the upper transmission short section is connected to the lower transmission short section through the connecting sleeve; the switching short section includes an upper housing, a ball receiving port, a spring, a flow dividing head and a fixer installed in the upper housing; the ball receiving port and the spring are installed in the flow dividing head in sequence; the lower end of the flow dividing head is connected to the fixer; side wall of the flow dividing head is provided with a side through hole; the upper end of the jet-type pulse generator is connected to the lower end of the fixer. The present invention realizes the use of jet flow and multiple groups of turbines as power sources. Compared with traditional mechanical hydraulic oscillators, it works more stably, has a lower application cost, can ensure long-time high-speed rotation, has a better speed-up effect than current rotary steering tools, and has a longer service life.

Description

Technical Field

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

[0002] With the continuous deepening of oilfield development and the progress of drilling technology, oil drilling is gradually developing towards extended reach wells and multi-branch horizontal wells. However, problems such as increased friction and drag and sticking of the drill string will occur during horizontal well drilling, seriously affecting the mechanical rotation speed. Especially during sliding drilling, due to excessive friction of the drill pipe, the drilling pressure cannot be effectively transmitted to the drill bit, resulting in reduced rock-breaking efficiency, extended drilling cycle, reduced operation efficiency, and greatly increased well construction costs. The development and application of a series of friction and drag reduction tools such as rotary percussion drill tools, hydraulic impactors, and hydraulic oscillators are of great significance for improving speed and efficiency. As an efficient friction and drag reduction tool, the hydraulic oscillator has been widely studied and tested.

[0003] The existing conventional hydraulic oscillator designs only target a certain vibration mechanism, and there is no design of a hydraulic oscillator with integrated or switchable multiple vibration modes. During the drilling process, various different formations often appear alternately, such as soft formations in the upper part, hard formations in the middle part, and possibly highly abrasive formations in the lower part, etc. After integrating multiple vibration generation mechanisms, the vibration modes can be flexibly switched or combined according to the characteristics of different formations such as hardness and abrasiveness. For soft formations, a suitable mechanism can be enabled to generate relatively gentle and low-frequency vibrations to assist drilling. When reaching hard formations, it can be switched to a mechanism that can generate high-frequency and high-intensity vibrations to break rocks, so as to more efficiently cope with complex formation changes, reduce the trouble of frequently tripping in and out to replace different oscillators, and improve drilling efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a double-vibration mechanism switching type 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 double-vibration mechanism switching type hydraulic oscillator, including a jet-type pulse generator and an oscillation sub, a switching sub, a turbine-type pulse generator, and a valve group connected in sequence;

[0006] The oscillation sub includes an oscillation mandrel, a disc spring group, a damper, and an upper transmission sub, a connection sleeve, and a lower transmission sub connected in sequence; the upper transmission sub is connected to the lower transmission sub through the connection sleeve; the disc spring group and the damper are sequentially installed on the lower end of the oscillation mandrel; the oscillation mandrel is installed in the upper transmission sub, the connection sleeve, and the lower transmission sub;

[0007] The switching nipple includes an upper housing, a ball receiving port, a spring, a diverter head and a retainer installed in the upper housing; the ball receiving port and the spring are sequentially installed in the diverter head; the lower end of the diverter head is connected to the retainer; a side through hole is provided on the side wall of the diverter head.

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

[0009] A further technical solution is that a rubber sealing ring is provided between the flow reducer and the inner wall of the lower drive nipple.

[0010] A further technical solution is that the jet pulse generator includes a jet housing, jet elements, a cylinder housing, a cylinder, a piston, a cylinder head and a throttle port; the jet elements are sequentially installed in the jet housing, the cylinder, the cylinder head and the throttle port 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 port; the upper end of the jet housing is connected to the lower end of the retainer, 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 elements include two nozzle blocks, two feedback blocks, a wedge tip, an upper cover plate and a lower bottom plate. The two nozzle blocks, two feedback blocks and the wedge tip are distributed between the upper cover plate and the lower bottom plate and are 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 oppositely arranged between the upper cover plate and the lower bottom plate.

[0012] A further technical solution is that the turbine pulse generator includes a turbine group, a main shaft, and a compression sleeve, a middle housing and a middle flexible nipple that are sequentially connected; a diverter 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 housing and the middle flexible nipple, and its upper end is installed inside the lower end of the diverter.

[0013] The valve group includes a moving valve group, a fixed valve group, and a lower housing and a lower flexible nipple that are sequentially connected; 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 nipple.

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

[0015] A further technical solution is that the upper centralizing bearing is located inside the upper end of the inner cavity of the middle housing, and the thrust bearing group is located inside the upper end of the inner cavity of the middle flexible nipple.

[0016] A further technical solution is that a lower centralizing bearing is provided inside the lower housing, and the moving valve group is installed in the lower centralizing bearing.

[0017] A further technical solution is that the fixator 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 jet-type hydraulic oscillators and turbine-type hydraulic oscillators, and can adapt to more complex formation changes compared with traditional oscillators with a single vibration mechanism.

[0020] 2. The present invention is applicable to both shallow well operations and deep well, ultra-deep well, and high-temperature and high-pressure well drilling operations. It can maintain the good operation of the drill string in a high friction environment, reduce the trouble of frequently tripping to replace different oscillators, and improve the drilling efficiency.

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

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

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

[0024] Figure 3 is a schematic structural diagram of the jet-type pulse generator and the switching sub in the present invention;

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

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

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

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

[0029] Figure 8 is a three-dimensional schematic diagram of the jet-type pulse generator and the switching sub;

[0030] Figure 9 is a cross-sectional view of the jet-type pulse generator and the switching sub;

[0031] Figure 10 is a three-dimensional schematic diagram of the diverter head;

[0032] Figure 11Three-dimensional schematic diagram of the receiving port;

[0033] Figure 12 Three-dimensional schematic diagram of the fixture;

[0034] Figure 13 Three-dimensional schematic diagram of the jet housing;

[0035] Figure 14 Three-dimensional schematic diagram of the cylinder housing;

[0036] Figure 15 Three-dimensional schematic diagram of the cylinder;

[0037] Figure 16 Three-dimensional schematic diagram of the piston;

[0038] Figure 17 Three-dimensional schematic diagram of the end cap;

[0039] Figure 18 Three-dimensional schematic diagram of the throttle port;

[0040] Figure 19 Three-dimensional schematic diagram of the jet element;

[0041] Figure 20 Three-dimensional schematic diagram of the turbine type pulse generator. Detailed implementation manners

[0042] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0043] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is 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 a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes 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", "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 those of ordinary skill in the art, 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 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] As Figures 1 - 20 shown, a double-vibration mechanism switching type hydraulic oscillator provided by the present invention includes a jet-type pulse generator 3 and an oscillation sub-section 1, a switching sub-section 2, a turbine-type pulse generator 4, and a valve group 5 that are connected in sequence;

[0047] The oscillation sub-section 1 includes an oscillation mandrel 11, a disc spring group 15, a damper 16, and an upper transmission sub-section 12, a connecting sleeve 13, and a lower transmission sub-section 14 that are connected in sequence; the upper transmission sub-section 12 is connected to the lower transmission sub-section 14 through the connecting sleeve 13; the disc spring group 15 and the damper 16 are sequentially installed on the lower end of the oscillation mandrel 11; the oscillation mandrel 11 is installed in the upper transmission sub-section 12, the connecting sleeve 13, and the lower transmission sub-section 14;

[0048] The side wall of the flow divider head 21 is provided with a side through hole; the switching sub-section 2 includes an upper housing 25, a receiving port 22, a spring 23, and a flow divider head 21 and a fixer 24 installed in the upper housing 25; the receiving port 22 and the spring 23 are sequentially installed in the flow divider head 21, and due to the action of the spring 23, that is, the receiving port 22 can reciprocate in the flow divider head 21 to block or open the side through hole; the lower end of the flow divider head 21 is connected to the fixer 24;

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

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

[0051] After the drilling fluid enters the switching sub-section 2, when it is necessary for the jet-type pulse generator 3 to generate a pulse, due to the elastic force of the spring 23, the upper end of the receiving port 22 blocks the side through hole of the flow divider head 21, and then the drilling fluid sequentially passes through the flow channels of the flow divider head 21, the receiving port 22, and the fixer 24 and enters the jet-type pulse generator 3, and then the jet-type pulse generator 3 generates a periodically changing high-pressure pulse;

[0052] When the jet generator 3 or the turbine generator 4 operates to generate a periodically changing high-pressure pulse, the pressure reducer 16 is subjected to an axial high-pressure pulse, squeezing the disc spring group 15. The disc spring is squeezed and deformed, and the oscillating mandrel 11 moves outward; when the high-pressure pulse decreases, the disc spring extends, squeezing the pressure reducer 16, and the oscillating mandrel 11 resets to complete 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] As Figure 2 shown, in this embodiment, an axial high-pressure pulse needs to be applied to the pressure reducer 16. Therefore, in a preferred embodiment, a rubber sealing ring is provided between the inner wall of the pressure reducer 16 and the lower transmission short section 14, which improves the sealing effect between the pressure reducer 16 and the inner wall of the lower transmission short section 14.

[0055] As Figure 3 shown, in a specific embodiment of the jet pulse generator 3 in this embodiment, the jet pulse generator 3 includes a jet housing 31, jet elements, a cylinder housing 35, a cylinder 36, a piston 37, a cylinder head 38, and a throttle port 39; the jet elements are sequentially installed in the jet housing 31, the cylinder 36, the cylinder head 38, and the throttle port 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 into the throttle port 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 elements include two nozzle blocks 32, two feedback blocks 33, a wedge tip 34, an upper cover plate 310, and a lower bottom 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 bottom 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 oppositely arranged between the upper cover plate 310 and the lower bottom plate 311.

[0057] The specific working process of the jet - type pulse generator 3 is as follows: The drilling fluid flows into the nozzle block 32 from the fixator 24. At the nozzle block 32, the fluid accelerates and flows out from the jet orifice to form a jet. The jet impacts the wedge tip 34. The flow velocity at the center of the jet is relatively fast, while the flow velocity of the part close to the feedback block 33 is relatively slow. The jet forms a low - pressure vortex between the upper and lower side walls. Due to the pressure disturbance in the upper and lower cavities, the jet adheres to the side wall with a smaller pressure. Suppose the jet adheres to the upper cavity. At this time, the fluid enters the upper cavity of the cylinder block 36. The pressure in the upper cavity of the cylinder block 36 surges, pushing the piston 37 downward. At the same time, the pressure in the upper - cavity feedback flow channel surges, and the upper - cavity feedback flow impacts the jet orifice. The pressure in the upper cavity increases, pushing the jet to switch and adhere to the lower cavity. At this time, the pressure in the lower cavity of the cylinder block 36 surges, pushing the piston 37 upward. The lower - cavity feedback flow impacts the jet orifice, and the jet switches and adheres again. The above process operates in a cycle, and the piston 37 moves up and down periodically in the cylinder block 36. At the same time, the lower end of the piston 37 cooperates with the throttle orifice 39. The periodic movement of the piston 37 causes the opening degree at the throttle orifice 39 to change periodically, forming a pressure pulse along the axis of the oscillation sub - section 1.

[0058] As Figure 2 shown, in a specific implementation manner of the turbine - type pulse generator 4 in this embodiment, it includes a turbine group 45, a main shaft 46, and a compression sleeve 42, a middle housing 44, and a middle flexible sub - section 48 that are 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 housing 44, and the middle flexible sub - section 48, and its upper end is installed inside the lower end of the flow divider 41; the upper end of the movable valve group 51 is connected to the lower end of the main shaft 46. Upper centralizing bearings 43 and a thrust bearing group 47 are sequentially installed on the main shaft 46. The turbine group 45 is located between the upper centralizing bearings 43 and the thrust bearing group 47. The upper centralizing bearings 43 are located inside the upper end of the inner cavity of the middle housing 44, and the thrust bearing group 47 is located inside the upper end of the inner cavity of the middle flexible sub - section 48;

[0059] The valve group 5 includes a movable valve group 51, a fixed valve group 52, and a lower housing 54 and a lower flexible sub - section 55 that are connected in sequence; a lower centralizing bearing 53 is provided inside the lower housing 54, and the movable valve group 51 is installed in the lower centralizing bearing 53; the upper end of the movable valve group 51 is connected to the main shaft 46. The fixed valve group 52 is installed on the upper end of the lower flexible sub - section 55. The lower end face of the movable valve group 51 contacts the upper end face of the fixed valve group 52, and a number of flow - through holes are provided on both the lower end face of the movable valve group 51 and the upper end face of the fixed valve group 52.

[0060] In this embodiment, when the turbine-type pulse generator 4 needs to generate high-pressure pulses, the switching sub 2 is used for switching. The specific switching process is as follows: The ball receiving port 22 has a funnel-shaped opening and a through hole below for the drilling fluid to pass through. This 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 above and fixed in 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 below the ball receiving port 22 is fixed to the fixator 24 to achieve vibration switching. At the same time, the drilling fluid enters the upper housing 25 through the side through hole, that is, the annulus between the upper housing 25, the diverter head 21, and the jet housing 31, and then enters the turbine-type pulse generator 4 and the valve group 5;

[0061] The specific process of the turbine-type pulse generator 4 generating high-pressure pulses is as follows: The drilling fluid enters the diverter 41 of the turbine-type pulse generator 4. The diverter 41 diverts the drilling fluid into the flow channels in the main shaft 46 and the middle housing 44. The drilling fluid in the middle housing 44 is used to drive the turbine group 45 to generate a rotational motion. The turbine group 45 drives the main shaft 46 to rotate at a 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 pulses are 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 the rotation of the moving valve group 51. The moving valve group 51 is driven by the main shaft 46 to rotate, and the fixed valve group 52 has a regular flow channel. When the moving 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 area. When they are staggered, the flow area decreases and the fluid pressure increases; when they coincide, the flow 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 oscillating mandrel 11. For shallow wells or medium-depth wells, the jet type is used as the vibration mechanism. The side through hole of the diverter head 21 is blocked by the ball receiving port 22, and the drilling fluid then enters the switching sub 2 along the flow channel, enters the jet generator 3 through the ball receiving port 22 to form a jet, and makes the piston 37 move up and down periodically in the cylinder block. The lower end of the piston 37 cooperates with the throttle port 39. The periodic movement of the piston 37 causes the opening degree at the throttle port 39 to change periodically, forming a pressure pulse in the axial direction of the oscillating sub 1. The shock absorber 16 is subjected to the axial high-pressure pulse, squeezing the disc spring group 15. The disc spring is squeezed and deformed, and the oscillating mandrel 11 moves outward; when the high-pressure pulse decreases, the disc spring elongates, squeezing the shock absorber 16, and the oscillating mandrel 11 resets to complete one oscillation.

[0065] For deep wells or ultra-deep wells, in order to overcome the large frictional resistance generated by the deep formation on the drill string, it is necessary to switch from the turbine type to the vibration mechanism. Project pellets along the pipeline. The pellets enter through the oscillating mandrel 11 and the diverter head 21 and are finally fixed at the ball receiving port 22. The pellets will block the passage of the drilling fluid at the ball receiving port 22, the hydraulic pressure in the ball receiving port 22 increases, the spring 23 is compressed downward, the ball receiving port 22 moves downward, the side through holes of the diverter head 21 are released and conducted, and the drilling fluid enters the flow channel between the diverter head 21 and the upper housing 25. The jet generator is deactivated and the turbine generator is activated to achieve the switching of the vibration mechanism.

[0066] The drilling fluid passes through the flow channel in the upper housing 25 and the diverter 41. A small part enters the flow channel in the main shaft 46, and most of the drilling fluid enters the flow channel in the middle housing 44 to maintain the high-speed operation of the turbine group 45. 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 a periodic axial pulse in the hydraulic oscillator. The periodic pulse is transmitted to the shock absorber 16, and the oscillating sub 1 also generates periodic oscillations.

[0067] The remaining drilling fluid passes through the flow channels in the middle flexible sub 48 and the lower flexible sub 55 and finally enters the pipeline.

[0068] As mentioned above, it is not a restriction on 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 person skilled in the art can make some changes or modifications to equivalent embodiments with equivalent changes within the scope of the technical solution of the present invention by using the technical content disclosed above. However, as long as it does not depart from the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A dual-vibration mechanism switching type hydraulic oscillator, characterized in that It includes a jet - type pulse generator and an oscillation sub - section, a switching sub - section, a turbine - type pulse generator, and a valve group connected in sequence; The oscillation sub - section includes an oscillation mandrel, a disc spring group, a damper, and an upper drive sub - section, a connecting sleeve, and a lower drive sub - section connected in sequence; the upper drive sub - section is connected to the lower drive sub - section through the connecting sleeve; the disc spring group and the damper are sequentially installed on the lower end of the oscillation mandrel; the oscillation mandrel is installed inside the upper drive sub - section, the connecting sleeve, and the lower drive sub - section; The switching sub - section includes an upper housing, a ball - receiving port, a spring, a diverter head, and a retainer installed inside the upper housing; the ball - receiving port and the spring are sequentially installed inside the diverter head; the lower end of the diverter head is connected to the retainer; a side hole is provided on the side wall of the diverter head; The upper end of the jet - type pulse generator is connected to the lower end of the retainer; The jet - type pulse generator includes a jet housing, jet elements, a cylinder housing, a cylinder, a piston, a cylinder head, and a throttle port; the jet elements are sequentially installed inside the jet housing, the cylinder, the cylinder head, and the throttle port are sequentially installed inside the cylinder housing, the piston is installed inside the cylinder, and its lower end passes through the cylinder head and extends into the throttle port; the upper end of the jet housing is connected to the lower end of the retainer, and the upper end of the cylinder housing is connected to the lower end of the jet housing; The turbine - type pulse generator includes a turbine group, a main shaft, and a compression sleeve, a middle housing, and a middle flexible sub - section connected in sequence; a diverter is installed inside the compression sleeve; the turbine group is installed on the main shaft; the main shaft is installed inside the compression sleeve, the middle housing, and the middle flexible sub - section, and its upper end is installed inside the lower end of the diverter; The valve group includes a moving valve group, a fixed valve group, and a lower housing, a lower flexible sub - 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 sub - section; 2. The double-vibration mechanism switching type hydraulic oscillator according to claim 1, wherein A rubber sealing ring is provided between the damper and the inner wall of the lower drive sub - section; 3. A dual-vibration mechanism switching type hydraulic oscillator according to claim 1, characterized in that, The jet elements include two nozzle blocks, two feedback blocks, a wedge tip, an upper cover plate, and a lower bottom plate. The two nozzle blocks, two feedback blocks, and the wedge tip are distributed between the upper cover plate and the lower bottom plate and are 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 oppositely arranged between the upper cover plate and the lower bottom plate; 4. A dual-vibration mechanism switching type hydraulic oscillator according to claim 3, characterized in that, An upper centralizing bearing and a thrust bearing group are sequentially installed on the main shaft, and the turbine group is located between the upper centralizing bearing and the thrust bearing group; 5. A dual-vibration mechanism switching type hydraulic oscillator according to claim 4, characterized in that, The upper centralizing bearing is located inside the upper end of the inner cavity of the middle housing, and the thrust bearing group is located inside the upper end of the inner cavity of the middle flexible sub - section; 6. The double-vibration mechanism switching type hydraulic oscillator according to claim 1, characterized in that, A lower centralizing bearing is provided inside the lower housing, and the moving valve group is installed inside the lower centralizing bearing; 7. A dual-vibration mechanism switching type hydraulic oscillator according to claim 1, characterized in that The retainer and the jet housing are connected by threads;

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