Oscillating screw drill movable valve assembly with flow switching function

Abstract

The utility model discloses an oscillating screw drill movable valve assembly with a flow switching function, which relates to the field of oil and gas drilling downhole tools and comprises an overflowing component and a flow adjusting part. The overflowing assembly comprises a movable valve plate, a flow dividing seat and a hollow anti-falling rod which are sequentially arranged from top to bottom and are axially through, an eccentric hole for drilling fluid to flow in is formed in the movable valve plate, and a center hole and a plurality of flow dividing holes located in the periphery of the center hole are formed in the flow dividing seat; the flow adjusting piece is detachably arranged between the center hole and the hollow anti-falling rod and comprises a center spray pipe and a center plug which are alternatively arranged so as to be used for changing the communication state between the center hole and the hollow anti-falling rod, and then the outflow flow of the flow dividing holes is adjusted. The drilling fluid flow can be conveniently and rapidly adjusted, the whole anti-falling rod does not need to be replaced, and the replacement efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of downhole tools for oil and gas drilling, specifically to an oscillating screw drill string dynamic valve assembly with flow switching function. Background Technology

[0002] In recent years, oil and gas resource exploration and development have moved towards deeper levels, and drilling engineering has faced the challenge of reducing friction and resistance near the drill bit. To solve this problem, domestic and foreign downhole power drilling tool manufacturers have integrated oscillating subs with conventional screw drills to form oscillating screw drills. These drills use drilling fluid flow as their power source. When high-pressure drilling fluid flows through the stator-rotor chamber inside the drill tool, it drives the rotor to perform planetary motion around the stator axis, thereby generating mechanical vibration. This effectively applies the oscillating force near the drill bit, alleviating formation pressure problems and improving the mechanical drilling rate. It can be said that the larger the drilling fluid discharge, the higher the motor speed and the higher the vibration frequency.

[0003] However, with the increasing demand for large-volume drilling on site, in order to avoid excessively high rotational speed caused by high flow rate and the erosion problem exacerbated by high flow rate, most existing oscillating screw drills adopt the method of replacing the entire anti-drop rod and matching it with a hollow rotor for flow diversion. Although this method can control the rotor speed, it also causes problems such as excessively high disassembly and maintenance costs and low replacement efficiency. Utility Model Content

[0004] This application provides a dynamic valve assembly for an oscillating screw drill bit with flow switching function to solve the technical problem of inconvenient flow switching in oscillating screw drill bits in related technologies.

[0005] This application provides an oscillating screw drill bit actuating valve assembly with flow switching function, including:

[0006] The flow-through assembly includes a moving valve plate, a flow divider seat, and a hollow anti-drop rod arranged sequentially from top to bottom and axially connected. The moving valve plate is provided with an eccentric hole for drilling fluid to flow in, and the flow divider seat is provided with a central hole and several flow divider holes located on the outer periphery of the central hole.

[0007] A flow regulating component is detachably disposed between the central hole and the hollow anti-fall rod. The flow regulating component includes a central nozzle and a central plug, which are selected to change the communication state between the central hole and the hollow anti-fall rod, thereby adjusting the outflow rate of the diversion hole.

[0008] In one embodiment, the flow-through assembly further includes a moving valve sleeve that is simultaneously fitted around the bottom outer periphery of the flow divider and the top outer periphery of the hollow anti-drop rod.

[0009] In one embodiment, the outflow direction of the flow divider hole of the flow divider seat is inclined along a direction away from the axis of the flow divider seat.

[0010] In one embodiment, the outer circumferential wall of the moving valve sleeve is provided with a plurality of guide surfaces spaced apart along the axial direction of the moving valve sleeve, the guide surfaces protruding from the outer wall of the moving valve sleeve and inclined downward.

[0011] In one embodiment, the diverter seat includes a receiving cavity and a connecting end located at the bottom of the receiving cavity and having a diameter smaller than that of the receiving cavity, and the diverter hole obliquely penetrates the outer wall of the receiving cavity.

[0012] In one embodiment, the bottom of the connecting end is embedded in the moving valve sleeve and threadedly connected to the inner wall of the moving valve sleeve at a corresponding position, and a plurality of sealing elements are provided at the connection between the connecting end and the moving valve sleeve.

[0013] In one embodiment, the connecting end has an axially formed through hole that is opposite to the position of the central hole. The top of the flow regulating component passes through the through hole and is opposite to the central hole. The bottom of the flow regulating component protrudes outside the connecting end and is threadedly connected to the inner wall of the moving valve sleeve at a corresponding position. The central nozzle is axially connected.

[0014] In one embodiment, the top of the hollow anti-drop rod is embedded in the bottom of the moving valve sleeve, and the rod body of the hollow anti-drop rod embedded in the moving valve sleeve is threadedly connected to the corresponding position of the inner wall of the moving valve sleeve.

[0015] In one embodiment, the bottom of the moving valve sleeve is provided with a shaft adjustment sleeve that simultaneously fits the outer periphery of the bottom of the moving valve sleeve and the outer periphery of the top of the hollow anti-drop rod, and the bottom of the shaft adjustment sleeve is provided with an anti-drop baffle.

[0016] In one embodiment, both the moving valve plate and the flow divider seat are made of hard alloy material.

[0017] The beneficial effects of the technical solutions provided in this application include:

[0018] 1. By simply replacing two small parts, the center nozzle or the center plug, the hollow flow splitting and non-hollow flow splitting can be quickly switched. Compared with the traditional replacement of the entire anti-drop bar, it can save a lot of replacement time and improve work efficiency.

[0019] 2. The structural parameters are adjustable. By adjusting the size parameters of some parts and replacing parts, it can adapt to different oscillation force and oscillation frequency requirements, adjust the screw drill speed, and control the drilling fluid flow rate within a reasonable range. To a certain extent, it can effectively avoid the erosion of the diverter seat and diverter hole caused by large flow rate.

[0020] 3. It has a reliable structure, simple principle, and is easy to process and maintain, making it suitable for mass production in factory workshops. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of a dynamic valve assembly for an oscillating screw drill bit with flow switching function provided in this application embodiment;

[0023] Figure 2 A top view of the moving valve plate in an oscillating screw drill bit moving valve assembly with flow switching function provided in an embodiment of this application;

[0024] Figure 3 A top view of the flow divider seat in an oscillating screw drill bit with flow switching function provided in an embodiment of this application;

[0025] Figure 4 A cross-sectional view of the moving valve sleeve in an oscillating screw drill bit moving valve assembly with flow switching function provided in an embodiment of this application;

[0026] Figure 5 A cross-sectional view of the flow divider seat in an oscillating screw drill bit with flow switching function provided in an embodiment of this application;

[0027] Figure 6 A schematic diagram of the central nozzle and central plug structure in an oscillating screw drill bit with flow switching function provided in an embodiment of this application;

[0028] Figure 7 A schematic diagram of the installation of the central nozzle in an oscillating screw drill bit with flow switching function provided in this application embodiment;

[0029] Figure 8 This is a schematic diagram of the installation of the center plug in an oscillating screw drill bit with flow switching function, provided in an embodiment of this application.

[0030] In the diagram: 1. Moving valve plate; 101. Eccentric hole; 2. Flow divider seat; 201. Center hole; 202. Flow divider hole; 203. Receiving cavity; 204. Connecting end; 205. Through hole; 3. Hollow anti-drop rod; 4. Flow regulating component; 401. Center nozzle; 402. Center plug; 5. Moving valve sleeve; 501. Guide surface; 6. Seal; 7. Shaft adjusting sleeve; 8. Anti-drop baffle plate. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0032] This application provides a dynamic valve assembly for an oscillating screw drill bit with flow switching function, which can solve the technical problem of inconvenient flow switching in the prior art.

[0033] The oscillating screw drill string valve assembly of this application is located at the top of the drill string. It includes a flow-through assembly and a flow regulator 4 located in the flow-through assembly. The top of the flow-through assembly is used for the inflow of drilling fluid, and the bottom is connected to the motor assembly. The drilling fluid flows out through the flow-through assembly into the drill string cavity and finally enters the motor assembly located below the drill string, driving the rotor in the motor assembly to perform planetary motion to generate mechanical vibration. In this application, in order to control the rotor speed, a diversion channel connected to the anti-drop rod is opened inside the flow-through assembly. The on / off state of the diversion channel is controlled by adding the flow regulator 4, without replacing the entire anti-drop rod. Under normal circumstances, the diversion channel is in the closed state, and all the drilling fluid is input into the motor assembly. When the rotor speed is too fast, the diversion channel is opened, and some of the drilling fluid is diverted into the anti-drop rod, reducing the flow rate of drilling fluid into the motor assembly and reducing the rotor speed.

[0034] Specifically, Figure 1 This is a schematic diagram of a oscillating screw drill bit with flow switching function provided in an embodiment of this application. Figure 2 This is a top view of the moving valve plate 1 in an oscillating screw drill bit moving valve assembly with flow switching function provided in an embodiment of this application. Figure 3 A top view of the flow divider seat 2 in an oscillating screw drill bit with flow switching function provided in this application embodiment, as shown below. Figure 1 , Figure 2 , Figure 3 As shown, the flow-through component of the oscillating screw drill tool moving valve assembly in this application includes a moving valve plate 1, a flow divider seat 2, and a hollow anti-drop rod 3 arranged sequentially from top to bottom and axially connected. The moving valve plate 1 is provided with an eccentric hole 101 for drilling fluid to flow in, and the flow divider seat 2 is provided with a central hole 201 and several flow divider holes 202 located on the outer periphery of the central hole 201.

[0035] The top of the moving valve plate 1 is provided with a mating surface for contacting the surface of the stationary valve plate above without gap or with a gap between the surfaces. The bottom of the moving valve plate 1 is embedded in the flow divider seat 2. The top of the flow divider seat 2 is provided with a mating step to facilitate the axial positioning of the moving valve plate 1. The eccentric hole 101 axially penetrates the moving valve plate 1 to provide a channel for drilling fluid to flow into the moving valve assembly. The oscillation force and oscillation frequency of the oscillating screw drill can be adjusted by adjusting the shape, size, eccentricity and the gap between the moving and stationary valves of the eccentric hole 101 of the moving valve plate 1.

[0036] The number of diversion holes 202 in the diversion seat 2 is at least two, and they are arranged symmetrically along the radial direction of the diversion seat 2. The diversion effect can be controlled by adjusting the size, number and direction of the diversion holes 202. Both the central hole 201 and the diversion holes 202 are connected to the eccentric hole 101. That is, the drilling fluid passing through the eccentric hole 101 will flow through the central hole 201 and the diversion holes 202 respectively. In one possible implementation, the top outer periphery of the diversion seat 2 is provided with an outer hexagon to facilitate the transmission of tooling torque during installation or disassembly.

[0037] In one possible implementation, both the moving valve plate 1 and the flow divider seat 2 are made of hard alloy material, which can withstand large-volume drilling fluid input, has good anti-erosion performance, and is not prone to erosion fracture problems.

[0038] The bottom of the hollow anti-fall rod 3 is connected to the motor assembly, which is used to transmit the power of the motor assembly to the moving valve assembly, so as to realize the periodic planetary rotation of the moving valve assembly and the stationary valve structure. It is hollow and the top is connected to the center hole 201 on the diverter seat 2 via the flow regulating component 4 to form a diversion channel for drilling fluid, which facilitates subsequent flow regulation of drilling fluid.

[0039] The flow regulating component 4 is detachably installed between the center hole 201 of the flow divider 2 and the hollow anti-fall rod 3, which can change the connection state between the center hole 201 and the hollow anti-fall rod 3. When drilling fluid flow control is required, only the flow regulating component 4 needs to be changed. There is no need to replace the entire hollow anti-fall bar 3. Specifically, the flow regulating component 4 includes a central nozzle 401 and a central plug 402, which are optionally installed. The central nozzle 401 is an axially continuous pipe, and the central plug 402 is a solid cylinder. When no flow regulation is required, the central plug 402 is installed between the central hole 201 and the hollow anti-fall bar 3. At this time, the diversion channel between the diversion seat 2 and the hollow anti-fall bar 3 is closed, and all drilling fluid flows out to the motor assembly through the diversion hole 202, increasing the rotor speed. Conversely, when the central nozzle 401 is installed between the central hole 201 and the hollow anti-fall bar 3, the diversion channel between the diversion seat 2 and the hollow anti-fall bar 3 is opened, and some drilling fluid flows into the hollow anti-fall bar 3, reducing the amount of drilling fluid flowing out to the motor assembly and decreasing the rotor speed.

[0040] Furthermore, the flow-through assembly also includes a moving valve sleeve 5, which is simultaneously fitted onto the outer periphery of the bottom of the flow divider 2 and the outer periphery of the top of the hollow anti-drop rod 3. Figure 4 A cross-sectional view of the moving valve sleeve 5 in an oscillating screw drill bit moving valve assembly with flow switching function provided in this application embodiment, as shown below. Figure 4 As shown, the moving valve sleeve 5 is mainly used to fix and position the current connection posture of the flow divider 2, the hollow anti-drop rod 3 and the flow regulating component 4. The inner wall shape of the moving valve sleeve 5 is adapted to the connection posture of the flow divider 2, the hollow anti-drop rod 3 and the flow regulating component 4, and it is divided into three connection areas from top to bottom: the top of the moving valve sleeve 5 is connected to the flow divider 2, the middle part is connected to the flow regulating component 4 and the bottom part is connected to the hollow anti-drop rod 3.

[0041] Simultaneously, the moving valve sleeve 5 can also guide the drilling fluid flowing out through the diversion hole 202, causing it to flow along a predetermined path. Specifically, the outflow direction of the diversion hole 202 of the diversion seat 2 is inclined away from the axis of the diversion seat 2, and its opening direction forms an acute angle with the axis of the diversion seat 2, so that the outflow end of the diversion hole 202 faces the outer wall of the moving valve sleeve 5. That is, the tops of the multiple diversion holes 202 are close to each other, and the bottoms of the multiple diversion holes 202 are far apart. The moving valve sleeve 5 is set below the diversion hole 202 so that the drilling fluid flowing out through the diversion hole 202 flows through the outer wall of the moving valve sleeve 5. The outer circumferential wall of the moving valve sleeve 5 is provided with several guide surfaces 501 spaced apart along the axial direction of the moving valve sleeve 5. See Figure 4 The guide surface 501 protrudes from the outer wall of the moving valve sleeve 5 and slopes downward. One or more guide surfaces 501 may be provided, and no specific limitation is made in this application.

[0042] Furthermore, Figure 5 A cross-sectional view of the flow divider seat 2 in an oscillating screw drill bit with flow switching function provided in this application embodiment, as shown below. Figure 5 As shown, the diverter seat 2 includes a receiving cavity 203 and a connecting end 204 located at the bottom of the receiving cavity 203 with a diameter smaller than that of the receiving cavity 203. The diverting hole 202 obliquely penetrates the outer wall of the receiving cavity 203. The drilling fluid flowing out through the moving valve plate 1 first enters the receiving cavity 203, and then flows to the central hole 201 and the diverting hole 202 respectively. The diverter seat 2 is configured as a shape that is larger at the top and smaller at the bottom. The central hole 201 and the obliquely arranged diverting hole 202 are opened on the wall of the receiving cavity 203 located at the top. The connecting end 204 located at the bottom is longitudinally embedded in the moving valve sleeve 5. The outer circumference of the connecting end 204 is provided with external threads, and the corresponding position of the inner wall of the top of the moving valve sleeve 5 is provided with internal threads. Several sealing grooves are opened on the outer circumferential wall of the end of the connecting end 204 embedded in the moving valve sleeve 5. Sealing rings are provided in the sealing grooves to achieve hydraulic static sealing.

[0043] Furthermore, the connecting end 204 has an axially formed through hole 205 that is opposite to the position of the center hole 201. The top of the flow regulating component 4 passes through the through hole 205 and is opposite to the center hole 201. The bottom of the flow regulating component 4 protrudes outside the connecting end 204 and is threadedly connected to the inner wall of the moving valve sleeve 5 at the corresponding position.

[0044] The top of the flow regulating component 4 is embedded in the flow divider 2, and the outer circumferential wall of the end embedded in the flow divider 2 is also provided with several sealing grooves. A sealing ring is provided in the sealing groove to achieve hydraulic static sealing. The bottom of the flow regulating component 4 is exposed outside the flow divider 2 and contacts the inner wall of the moving valve sleeve 5. The contact surfaces of the two are also provided with matching threads. In one possible embodiment, the bottom of the flow regulating component 4 is provided with an inner groove to facilitate the transmission of tooling torque during installation or disassembly.

[0045] Figure 6 A schematic diagram of the central nozzle 401 and central plug 402 in an oscillating screw drill bit with flow switching function provided in this application embodiment is shown below. Figure 6 As shown, the central nozzle 401 of the flow regulating component 4 is axially through, and the outlet end of the central nozzle 401 forms the aforementioned inner groove. The central plug 402 of the flow regulating component 4 is a solid structure, and the aforementioned inner groove is additionally opened at the bottom.

[0046] Further details can be found here. Figure 1 The top of the hollow anti-fall rod 3 is embedded in the bottom of the moving valve sleeve 5 and connected to the bottom of the flow regulating component 4. The outer wall of the top of the hollow anti-fall rod 3 and the inner wall of the bottom of the moving valve sleeve 5 are also provided with matching threads. When the assembly is completed, the bottom end of the flow regulating component 4 is directly opposite the top of the hollow anti-fall rod 3.

[0047] Further details can be found here. Figure 1 The bottom of the moving valve sleeve 5 is provided with a shaft adjustment sleeve 7 that fits on the outer periphery of the bottom of the moving valve sleeve 5 and the outer periphery of the top of the hollow anti-fall rod 3. The inner wall of the shaft adjustment sleeve 7 contacts both the moving valve sleeve 5 and the hollow anti-fall rod 3. Therefore, its inner wall diameter is larger at the top and smaller at the bottom. The height difference between the moving valve sleeve 5 and its guide surface 501 forms a stepped surface. The top of the shaft adjustment sleeve 7 fits against the stepped surface of the bottom of the moving valve sleeve 5 for axial positioning and to achieve the uprighting effect of the cylinder. The anti-fall baffle 8 has a central through hole, which allows drilling fluid to flow through and forms a mechanical limit. It is mainly used to prevent internal components (such as hollow rotors, drive shafts, etc.) from falling to the bottom of the well when the drill bit breaks or the connection fails. The anti-fall baffle 8 is a commonly used component and will not be described in detail here.

[0048] Figure 7 This application provides a schematic diagram of the installation of the central nozzle 401 in an oscillating screw drill bit with flow switching function, as shown in the embodiment of this application. Figure 8This application provides a schematic diagram of the installation of the center plug 402 in an oscillating screw drill bit with flow switching function, as shown in the embodiment of this application. Figure 7 , Figure 8 The working principle of the oscillating screw drill bit moving valve assembly in this application is as follows: When the drilling fluid passes through the upper static valve, it flows from the eccentric hole 101 of the moving valve plate 1 into the receiving cavity 203 of the diverter seat 2, and then flows out through the diverter hole 202, entering the annulus formed between the moving valve assembly and the drill bit. Both the moving valve plate 1 and the diverter seat 2 are made of hard alloy material. The maximum flow velocity point of the drilling fluid is located in the receiving cavity 203 of the diverter seat 2, which can protect the lower parts string from being eroded by the fluid. After entering the annulus, the fluid passes through the guide surface 501 of the moving valve sleeve 5 and is input to the lower motor assembly, driving the rotor to perform planetary motion. Through the hollow anti-drop rod 3, the moving valve sleeve 5, and the diverter seat 2 connected to the rotor, the flow area of ​​the moving and static valve plates changes periodically, thereby generating oscillation force. When hollow flow diversion is not required, the center plug 402 is installed between the diversion seat 2 and the hollow anti-fall rod 3. The drilling fluid cannot enter the hollow anti-fall rod 3 from the cavity of the diversion seat 2. All the drilling fluid flows from the annulus into the lower motor assembly. When the motor speed is too high and hollow flow diversion is required, it is not necessary to replace the entire motor assembly. Only the center nozzle 401 is installed in the diversion seat 2. The fluid is diverted from the center of the diversion seat 2 and enters the hollow anti-fall rod 3. The flow rate in the annulus is reduced, and some fluid flows from the annulus into the lower motor assembly.

[0049] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0050] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0051] The above are merely specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A oscillating screw drill bit actuator valve assembly with flow switching function, characterized in that, include: The flow-through assembly includes a moving valve plate (1), a flow divider seat (2), and a hollow anti-drop rod (3) arranged sequentially from top to bottom and axially connected. The moving valve plate (1) is provided with an eccentric hole (101) for drilling fluid to flow in. The flow divider seat (2) is provided with a central hole (201) and several flow divider holes (202) located on the outer periphery of the central hole (201). The flow regulating component (4) is detachably disposed between the central hole (201) and the hollow anti-fall rod (3). The flow regulating component (4) includes a central nozzle (401) and a central plug (402) which are selectively disposed to change the communication state between the central hole (201) and the hollow anti-fall rod (3), thereby adjusting the outflow flow of the diversion hole (202).

2. The oscillating screw drill bit actuating valve assembly with flow switching function as described in claim 1, characterized in that: The flow-through assembly also includes a moving valve sleeve (5) that is simultaneously fitted on the bottom outer periphery of the flow divider (2) and the top outer periphery of the hollow anti-drop rod (3).

3. The oscillating screw drill bit valve assembly with flow switching function as described in claim 2, characterized in that: The outflow direction of the diversion hole (202) of the diversion seat (2) is inclined along the direction away from the axis of the diversion seat (2).

4. The oscillating screw drill bit valve assembly with flow switching function as described in claim 3, characterized in that: The outer circumferential wall of the moving valve sleeve (5) is provided with a plurality of guide surfaces (501) spaced apart along the axial direction of the moving valve sleeve (5). The guide surfaces (501) protrude from the outer wall of the moving valve sleeve (5) and are inclined downward.

5. The oscillating screw drill bit valve assembly with flow switching function as described in claim 2, characterized in that: The diversion seat (2) includes a receiving cavity (203) and a connecting end (204) located at the bottom of the receiving cavity (203) and having a diameter smaller than that of the receiving cavity (203). The diversion hole (202) obliquely penetrates the outer wall of the receiving cavity (203).

6. The oscillating screw drill bit actuating valve assembly with flow switching function as described in claim 5, characterized in that: The bottom of the connecting end (204) is embedded in the moving valve sleeve (5) and threadedly connected to the inner wall of the moving valve sleeve (5) at the corresponding position. Several sealing elements (6) are provided at the connection between the connecting end (204) and the moving valve sleeve (5).

7. The oscillating screw drill bit valve assembly with flow switching function as described in claim 5, characterized in that: The connecting end (204) has an axial through hole (205) that is opposite to the position of the central hole (201). The top of the flow regulating component (4) passes through the through hole (205) and is opposite to the central hole (201). The bottom of the flow regulating component (4) protrudes outside the connecting end (204) and is threadedly connected to the inner wall of the moving valve sleeve (5) at the corresponding position. The central nozzle (401) is axially through.

8. The oscillating screw drill bit actuating valve assembly with flow switching function as described in claim 2, characterized in that: The top of the hollow anti-fall rod (3) is embedded in the bottom of the moving valve sleeve (5), and the rod body of the hollow anti-fall rod (3) is threadedly connected to the corresponding position of the inner wall of the moving valve sleeve (5).

9. The oscillating screw drill bit actuating valve assembly with flow switching function as described in claim 8, characterized in that: The bottom of the moving valve sleeve (5) is provided with a shaft adjustment sleeve (7) that fits on the outer periphery of the bottom of the moving valve sleeve (5) and the outer periphery of the top of the hollow anti-drop rod (3). The bottom of the shaft adjustment sleeve (7) is provided with an anti-drop plate (8).

10. The oscillating screw drill bit actuating valve assembly with flow switching function as described in claim 1, characterized in that: Both the moving valve plate (1) and the flow divider seat (2) are made of hard alloy material.

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