Transverse hydraulic oscillator for well drilling and use method

Abstract

The invention belongs to the technical field of petroleum and natural gas well drilling, and particularly relates to a transverse hydraulic oscillator for well drilling and a using method. The transverse hydraulic oscillator for well drilling comprises a shell and a shaft rotationally connected into the shell, a first flow channel is formed between the shell and the shaft, an eccentric block is fixedly connected to the shaft, turbines are fixed to the positions, located at the two ends of the eccentric block, of the shaft, and the eccentric block and the turbines are located in the first flow channel. According to the transverse hydraulic oscillator, due to the fact that the turbines are arranged at the two ends of the eccentric block, stress is uniform, stability is high, and well cementation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of oil and gas drilling, and particularly relates to a transverse hydraulic oscillator for drilling and a use method thereof. BACKGROUND

[0002] With the continuous development of oil and gas well technology, the proportion of horizontal well and extended reach well exploration and development gradually increases. In the drilling of horizontal well and extended reach well, well trajectory control, mechanical drilling speed improvement and extension limit are all problems that limit the rapid and stable drilling of such wells. Among them, the high frictional resistance between the drill pipe and the well wall is a key factor causing the above problems, such as the problem of mechanical drilling speed improvement, the drilling pressure is a key factor restricting the rock breaking efficiency of the drill bit, and when the frictional resistance between the drill pipe and the well wall is too large, the proportion of the drilling pressure transmitted to the drill bit is low, or even cannot be transmitted to the drill bit, so that the drill bit cannot break the rock. Therefore, in order to further improve the drilling efficiency of horizontal well and extended reach well, it is necessary to reduce the frictional resistance between the drill pipe and the well wall.

[0003] In the drilling process of horizontal well and extended reach well, the friction coefficient between the drill pipe and the well wall is related to the contact form between the drill pipe and the well wall, that is, the friction coefficient is related to the relative motion speed between the drill pipe and the well wall, and presents a nonlinear relationship. When there is no relative motion between the drill pipe and the well wall, the friction coefficient between the drill pipe and the well wall is the static friction coefficient. When there is a large relative motion speed between the drill pipe and the well wall, the friction coefficient between the drill pipe and the well wall is the dynamic friction coefficient. The dynamic friction coefficient between the drill pipe and the well wall is smaller than the static friction coefficient, that is, when there is relative motion between the drill pipe and the well wall, the frictional resistance will decrease. At the same time, the friction between the drill pipe and the well wall is related to the normal pressure between them, such as when the normal pressure changes periodically, the relative motion state between the drill pipe and the well wall will be improved.

[0004] At present, the hydraulic oscillator is a common tool for reducing the frictional resistance between the drill pipe and the well wall. This kind of tool provides high frequency oscillation load through the drill pipe to improve the motion state of the drill pipe, so as to reduce the frictional resistance. According to the form of oscillation force of the hydraulic oscillator, it can be divided into axial hydraulic oscillator and transverse hydraulic oscillator. Among them, the transverse hydraulic oscillator provides transverse reciprocating oscillation to the drill string, so that the normal pressure between the drill string and the well wall changes periodically, the relative motion speed between the drill string and the well wall increases, and the drag reduction effect is achieved.

[0005] Chinese patent application CN116220599A discloses an eccentric turbine type vibration cementing tool and a vibration method. The eccentric turbine type vibration cementing tool comprises a main body assembly and a vibration assembly. The main body assembly is formed into a cavity by a first cover plate, a second cover plate and an outer cylinder. The vibration assembly comprises an eccentric turbine and an eccentric block. The eccentric turbine comprises a shaft and a turbine. The top end of the shaft is suspendedly connected to the first cover plate. The bottom end of the shaft is rotatably connected to the second cover plate. The eccentric block is located on one side of the shaft and connected to the turbine to form an eccentric structure. The fluid flow drives the eccentric turbine to rotate to generate a resultant force and a centrifugal force along the axial direction. The centrifugal force makes the eccentric block move periodically along the radial direction to form regular axial hydraulic impact and radial vibration effects.

[0006] However, the eccentric turbine type vibration cementing tool has low stability and reduces the cementing efficiency during use.

[0007] Therefore, the present application is proposed. SUMMARY

[0008] To solve the technical problems in the prior art, the present application provides a transverse hydraulic oscillator for drilling and a use method. The transverse hydraulic oscillator of the present application has the turbine arranged at both ends of the eccentric block, which is uniformly stressed and has high stability, thereby improving the cementing efficiency.

[0009] The present application comprises the following technical solutions:

[0010] The present application provides a transverse hydraulic oscillator for drilling in the first aspect, comprising a shell and a shaft rotatably connected in the shell. A first flow channel is formed between the shell and the shaft. An eccentric block is fixedly connected to the shaft. Turbines are fixedly arranged at both ends of the eccentric block. The eccentric block and the turbines are located in the first flow channel.

[0011] Further, the two turbines are symmetrically arranged.

[0012] Further, a second flow channel is arranged through the shaft in the axial direction.

[0013] A valve ball seat is connected to the bottom of the shaft. A valve ball hole flow channel is arranged on the shaft above the valve ball seat and communicates with the second flow channel. A ball bag is connected in the shell below the valve ball seat. A first drainage hole is arranged on the ball bag.

[0014] Drilling fluid is injected into the shell. The drilling fluid enters the second flow channel and the first flow channel respectively. The drilling fluid flowing through the first flow channel and the second flow channel can pass through the first drainage hole.

[0015] Further, the valve ball seat is provided with a first valve ball, and the first valve ball is located below the valve ball hole flow channel.

[0016] Further, the first drainage hole is arranged in plurality.

[0017] Further, the ball pocket comprises a U-shaped ball pocket and a ring-shaped connecting seat, the inner ring of the ring-shaped connecting seat is connected with the U-shaped ball pocket, the outer ring of the ring-shaped connecting seat is fixedly connected with the shell, and the ring-shaped connecting seat uniformly surrounds the first drainage hole.

[0018] Further, the middle part of the U-shaped ball pocket is connected with the ring-shaped connecting seat and is located above the ring-shaped connecting seat, the U-shaped ball pocket is provided with the third drainage hole and is located below the ring-shaped connecting seat, and the U-shaped ball pocket is provided with the third drainage hole.

[0019] Further, the shaft is rotatably connected with the shell through a centralizing bearing, and the centralizing bearing is provided with the second drainage hole.

[0020] Further, the upper end of the shaft is connected with the shell through a first centralizing bearing, the lower end of the shaft is connected with the shell through a second centralizing bearing, and the second centralizing bearing is located above the valve ball hole flow channel.

[0021] The inner surface of the shell is provided with a limiting boss, and the second centralizing bearing abuts against the limiting boss.

[0022] The second aspect of the present application provides a use method of the transverse hydraulic oscillator for drilling, comprising the transverse hydraulic oscillator for drilling, and the use method comprises the following steps:

[0023] Lowering the transverse hydraulic oscillator into a well;

[0024] Throwing a first valve ball into the transverse hydraulic oscillator to close the valve ball seat;

[0025] Injecting drilling fluid into the transverse hydraulic oscillator, the drilling fluid enters the first flow channel of the transverse hydraulic oscillator, the turbine rotates to make the eccentric block produce eccentric motion, and high-frequency transverse vibration is generated;

[0026] When the working frequency of the transverse hydraulic oscillator is lowered, a second valve ball is thrown into the transverse hydraulic oscillator to block the valve ball hole flow channel, the pressure of the second flow channel is increased, the first valve ball is extruded to make the first valve ball and the second valve ball drop into the ball pocket through the valve ball seat, and the flow rate of the drilling fluid flowing into the first flow channel is reduced.

[0027] By adopting the above technical scheme, the present application has the following advantages:

[0028] 1. The transverse hydraulic oscillator has uniform stress and high stability because the turbine is arranged at both ends of the eccentric block, and the cementing efficiency is improved.

[0029] 2. The transverse hydraulic oscillator of the present application generates transverse vibration through eccentric movement generated during eccentric block rotation.

[0030] 3. The present application adjusts the flow direction of the drilling fluid through the opening and closing state of different flow channels, controls the drilling fluid flow rate through the turbine, and further realizes the axial vibration frequency of the transverse hydraulic oscillator, thereby improving the service life and stability of the oscillator.

[0031] 4. The oscillator of the present application is easy to operate, has strong adaptability, and has a simple structure; when the drilling tool is connected for use, the structure of the drilling tool is not affected, and axial vibration of the drilling tool can be realized in the well.

[0032] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application can be achieved and obtained by the structure indicated in the specification and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0034] Figure 1 Structure diagram of a transverse hydraulic oscillator for drilling in an embodiment of the present application Figure One ;

[0035] Figure 2 Structure diagram of a transverse hydraulic oscillator for drilling in an embodiment of the present application Figure Two ;

[0036] Figure 3 Structure diagram of a transverse hydraulic oscillator for drilling in an embodiment of the present application Figure Three ;

[0037] Figure 4 Structure diagram of a transverse hydraulic oscillator for drilling in an embodiment of the present application Figure Four ;

[0038] Figure 5 Structure diagram of a transverse hydraulic oscillator for drilling in an embodiment of the present application Figure 4 ;

[0039] Figure 6 Structure diagram of a transverse hydraulic oscillator for drilling in an embodiment of the present application Figure One ;

[0040] In the figure: 10 - housing, 20 - shaft, 30 - eccentric block, 40 - turbine, 50 - first flow channel, 60 - second flow channel, 70 - valve ball seat, 80 - valve ball hole flow channel, 90 - ball pocket, 91 - U-shaped ball pocket, 911 - third drainage hole, 92 - annular connecting seat, 921 - first drainage hole, 100 - first valve ball, 110 - second valve ball, 120 - first centralizing bearing, 121 - outer ring, 122 - inner ring, 123 - second drainage hole, 130 - second centralizing bearing, 140 - outer fixing nut, 150 - inner fixing nut, 160 - limiting boss. DETAILED DESCRIPTION

[0041] The following description provides many different embodiments, or examples, for implementing different features of the application. Specific examples are described in the following description to provide a thorough explanation of the application. These examples are not intended to be limiting. Rather, these examples are intended to describe the general manner of implementing the application.

[0042] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0043] The present embodiment provides a transverse hydraulic oscillator for drilling, which comprises a housing 10 and a shaft 20. Figure 1 As described above, the first flow channel 50 is formed between the housing 10 and the shaft 20, the eccentric block 30 is fixedly connected to the shaft 20, the turbine 40 is fixedly connected to the shaft 20 at both ends of the eccentric block 30, and the eccentric block 30 and the turbine 40 are located in the first flow channel 50. The drilling fluid enters the first flow channel 50 to drive the turbine 40 to rotate, the turbine 40 drives the shaft 20 to rotate, and the shaft 20 drives the eccentric block 30 to rotate.

[0044] It should be noted that the connection mode of the housing 10 and the shaft 20 is not limited in the present application, as long as the shaft 20 can be rotatably connected in the housing 10, and the drilling fluid can enter and exit the first flow channel 50 to realize circulation. The structures that can be achieved in the prior art should be within the protection scope of the present application.

[0045] When the eccentric block 30 is designed at one end, the support is only at the other end, the eccentric block 30 swings greatly relative to the shaft 20 line, and the other end only rotates around the shaft 20 line. When the eccentric block 30 is located between the two turbines 40, the eccentric block 30 driven by the two turbines 40 is driven at the same time, the whole generates a stable transverse swing, the stress is more uniform, the stability is high, and the cementing efficiency is improved.

[0046] The technical problems existing in the prior art can be solved as long as turbines 40 are provided at both ends of the eccentric block 30. Therefore, the present invention does not limit the size of the turbines 40 or their distance from the eccentric block 30. However, in order to further improve the uniformity of the oscillating force of the eccentric block 30, in some embodiments, the two turbines 40 are symmetrically arranged. The symmetrical arrangement is a further limitation on the position of the turbines 40 and the eccentric block 30, and does not represent a limitation on the size and structure of the turbines 40. In order to further improve the uniformity of the oscillating force of the eccentric block 30, the two turbines 40 are the same in size and structure.

[0047] It should be noted that the specific structural shape of the turbine 40 is not limited by this invention. Any turbine 40 structural shape that can be used in an oscillator in the prior art should be within the protection scope of this invention.

[0048] Preferably, the housing 10 is coaxially arranged with the shaft 20, which has a better lateral oscillation effect.

[0049] A hydraulic oscillator is a hydraulically driven tool that uses high-pressure drilling fluid as its driving medium. The tool begins operating when the drilling fluid is circulated. However, the hydraulic oscillator is not always necessary during drilling. For example, during wellbore flushing, no drilling pressure is applied, meaning the oscillator does not need to operate. But once the mud pump starts operating, the hydraulic oscillator begins working. This unnecessary operation time can cause premature failure of the hydraulic oscillator, limiting its operating time. Therefore, in some embodiments, such as... Figure 1 As shown, a second flow channel 60 is axially through the shaft 20; a valve ball seat 70 is connected to the bottom of the shaft 20; a valve ball hole flow channel 80 communicating with the second flow channel 60 is provided on the shaft 20 above the valve ball seat 70; a ball bag 90 is connected to the housing 10 below the valve ball seat 70; the ball bag 90 is threadedly connected to the housing 10; a first drainage hole 921 is provided on the ball bag 90; drilling fluid is injected into the housing 10, and the drilling fluid enters the second flow channel 60 and the first flow channel 50 respectively; the drilling fluid flowing through the first flow channel 50 and the second flow channel 60 can pass through the first drainage hole 921.

[0050] This allows the hydraulic oscillator to be controlled downhole, activating when necessary and deactivating when not needed, thus greatly increasing the working time of such tools, reducing costs and increasing efficiency, and extending their service life.

[0051] The valve ball seat 70 and the shaft 20 can be integrally formed, so the valve ball orifice flow channel 80 can belong to either the valve ball seat 70 or the shaft 20. Preferably, there are two valve ball orifices, which are symmetrically arranged.

[0052] like Figure 2 As shown, in some embodiments, the valve ball seat 70 is provided with a first valve ball 100, and the first valve ball 100 is located below the valve ball orifice flow channel 80. This structure allows the hydraulic oscillator of the present invention to be directly deployed into a well for use. It should be noted that, as... Figure 1 As shown, the situation where the first valve ball 100 is not installed inside the ball bag 90 should also be within the protection scope of this invention. However, after the hydraulic oscillator of this invention is lowered into the well, the first valve ball 100 needs to be installed.

[0053] When the lateral hydraulic oscillator is working, if lateral oscillation is required, such as Figure 2 As shown, the first valve ball 100 is mounted on the valve ball seat 70, causing the valve ball seat 70 to close. This reduces the flow rate of drilling fluid entering the second flow channel 60 and increases the flow rate of drilling fluid entering the first flow channel 50. When it is necessary to stop the lateral oscillation, as... Figure 3 As shown, the second valve ball 110 is inserted, which closes the valve ball orifice flow channel 80. As drilling fluid continues to flow in, the pressure in the second flow channel 60 increases, which squeezes the first valve ball 100, causing the first valve ball 100 and the second valve ball 110 to fall into the ball bag 90 through the valve ball seat 70, thus reducing the flow rate of drilling fluid into the first flow channel 50.

[0054] In some embodiments, multiple first drainage holes 921 are provided.

[0055] In some embodiments, such as Figure 6 As shown, the ball bag 90 includes a U-shaped ball bag 91 and an annular connecting seat 92. The U-shaped ball bag 91 is connected to the inner ring of the annular connecting seat 92, and the outer ring of the annular connecting seat 92 is fixedly connected to the housing 10. A plurality of first drainage holes 921 are evenly arranged around the annular connecting seat 92.

[0056] like Figure 6 As shown, the U-shaped ball bag 91 is connected to the annular connecting seat 92 at its middle part and is located above the annular connecting seat 92. The U-shaped ball bag 91 is provided with a third drainage hole 911, located below the annular connecting seat 92. The outer ring of the annular connecting seat 92 is connected to the housing 10 by threads.

[0057] In some embodiments, the bottom of the U-shaped ball seat is provided with a hole, which provides a flow channel for drilling fluid.

[0058] In some embodiments, the shaft 20 is rotatably connected to the housing 10 via a centering bearing, the centering bearing being provided with a second drainage hole 123.

[0059] In some embodiments, the upper end of the shaft 20 is connected to the housing 10 through a first centralizing bearing 120, the lower end of the shaft 20 is connected to the housing 10 through a second centralizing bearing 130, and the second centralizing bearing 130 is located above the valve ball hole flow passage 80; a limiting boss 160 is arranged on the inner surface of the housing 10, and the second centralizing bearing 130 abuts against the limiting boss 160.

[0060] As shown in Figure 4 , Figure 5 , the top surface of the outer ring 121 of the first centralizing bearing 120 abuts against the bottom surface of the outer fixed nut 140, and the top surface of the inner ring 122 of the first centralizing bearing 120 abuts against the bottom surface of the inner fixed nut 150. The outer fixed nut 140 is a circular ring, and an outer thread is arranged on the outer surface of the outer fixed nut 140, and the outer fixed nut 140 is fixedly connected to the housing 10 through the outer thread. The inner fixed nut 150 is a circular ring, and an inner thread is arranged on the inner surface of the inner fixed nut 150, and the inner fixed nut 150 is fixedly connected to the shaft 20 through the inner thread.

[0061] The bottom surface of the second centralizing bearing 130 abuts against the top surface of a multi-stage thrust bearing, and the bottom surface of the multi-stage thrust bearing abuts against the limiting boss 160 of the housing 10. Drilling fluid can smoothly pass through the second drainage hole 123 on the centralizing bearing and flow out along the gap on the multi-stage thrust bearing.

[0062] The embodiment also provides a use method of the transverse hydraulic oscillator for drilling, which comprises the transverse hydraulic oscillator for drilling described above, and the use method comprises the following steps:

[0063] As shown in Figure 1 , the transverse hydraulic oscillator is lowered into a well;

[0064] As shown in Figure 2 , the first valve ball 100 is put into the transverse hydraulic oscillator, so that the valve ball seat 70 is closed; thus, after drilling fluid is injected, the drilling fluid flow into the second flow passage 60 is small, and the drilling fluid flow into the first flow passage 50 is improved;

[0065] Drilling fluid is injected into the transverse hydraulic oscillator, the drilling fluid enters the first flow passage 50 of the transverse hydraulic oscillator, the turbine 40 rotates to make the eccentric block 30 produce eccentric motion, and high-frequency transverse vibration is generated;

[0066] When the working frequency of the transverse hydraulic oscillator is lowered, as shown in Figure 3 , the second valve ball 110 is put into the transverse hydraulic oscillator, the valve ball hole flow passage 80 is blocked, the pressure of the second flow passage 60 is increased, as shown in Figure 6 , the first valve ball 100 is extruded to make the first valve ball 100 and the second valve ball 110 fall into the ball bag 90 through the valve ball seat 70, and the drilling fluid flow into the first flow passage 50 is reduced;

[0067] When the working frequency of the transverse hydraulic oscillator is to be increased, the first valve ball 100 is put into the transverse hydraulic oscillator, so that the valve ball seat 70 is closed.

[0068] The opening and closing states of the different flow channels of the method can adjust the flow direction of the drilling fluid, control the flow rate of the drilling fluid flowing through the turbine 40 driving structure, and further realize the transverse vibration frequency control of the hydraulic oscillator, which has the advantages of cost reduction and efficiency improvement and prolonging the service life. When the transverse hydraulic oscillator works, it also needs to be connected with the drilling tool, and can also switch the working frequency of the drilling tool during the downhole operation, thereby increasing the service life and stability of the drilling tool.

[0069] In the description of the present application, the terms "first", "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0070] In the description of the present application, it should be noted that, unless otherwise specifically specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between multiple elements or the interaction relationship between multiple elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0071] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A transverse hydraulic oscillator for drilling, comprising a housing (10) and a shaft (20) rotatably connected within the housing (10), wherein a first flow channel (50) is formed between the housing (10) and the shaft (20), characterized in that, An eccentric block (30) is fixedly connected to the shaft (20), and turbines (40) are fixed at both ends of the eccentric block (30) on the shaft (20). The eccentric block (30) and the turbines (40) are both located in the first flow channel (50).

2. The transverse hydraulic oscillator for drilling according to claim 1, characterized in that, The two turbines (40) are arranged symmetrically.

3. A transverse hydraulic oscillator for drilling according to claim 1, characterized in that, The shaft (20) is provided with a second flow channel (60) through its axial direction; A valve ball seat (70) is connected to the bottom of the shaft (20); a valve ball hole flow channel (80) communicating with the second flow channel (60) is provided on the shaft (20) above the valve ball seat (70); a ball bag (90) is connected to the housing (10) below the valve ball seat (70); a first drainage hole (921) is provided on the ball bag (90); Drilling fluid is injected into the casing (10), and the drilling fluid enters the second flow channel (60) and the first flow channel (50) respectively; the drilling fluid flowing through the first flow channel (50) and the second flow channel (60) can pass through the first drainage hole (921).

4. A transverse hydraulic oscillator for drilling according to claim 3, characterized in that, The valve ball seat (70) is provided with a first valve ball (100), and the first valve ball (100) is located below the valve ball orifice flow channel (80).

5. A transverse hydraulic oscillator for drilling according to claim 3, characterized in that, Multiple first drainage holes (921) are provided.

6. A transverse hydraulic oscillator for drilling according to claim 5, characterized in that, The ball bag (90) includes a U-shaped ball bag (91) and an annular connecting seat (92). The U-shaped ball bag (91) is connected to the inner ring of the annular connecting seat (92). The outer ring of the annular connecting seat (92) is fixedly connected to the housing (10). The annular connecting seat (92) is evenly arranged with a plurality of first drainage holes (921).

7. A transverse hydraulic oscillator for drilling according to claim 6, characterized in that, The U-shaped ball bag (91) is connected to the annular connecting seat (92) in the middle and is located above the annular connecting seat (92). The U-shaped ball bag (91) is provided with a third drainage hole (911) located below the annular connecting seat (92).

8. A transverse hydraulic oscillator for drilling according to any one of claims 3-7, characterized in that, The shaft (20) is rotatably connected to the housing (10) via a centering bearing, and the centering bearing is provided with a second drainage hole (123).

9. A transverse hydraulic oscillator for drilling according to claim 8, characterized in that, The upper end of the shaft (20) is connected to the housing (10) through a first straightening bearing (120), and the lower end of the shaft (20) is connected to a second straightening bearing (130), with the second straightening bearing (130) located above the valve ball orifice flow channel (80). The inner surface of the housing (10) is provided with a limiting boss (160), and the second centering bearing (130) abuts against the limiting boss (160).

10. A method of using a transverse hydraulic oscillator for drilling, characterized in that, The method of using a drilling transverse hydraulic oscillator, comprising any one of claims 1-9, includes the following steps: Lower the transverse hydraulic oscillator into the well; Insert the first valve ball (100) into the transverse hydraulic oscillator to close the valve ball seat (70); Drilling fluid is injected into the transverse hydraulic oscillator. The drilling fluid enters the first flow channel (50) of the transverse hydraulic oscillator. The turbine (40) rotates, causing the eccentric block (30) to generate eccentric motion and produce high-frequency transverse vibration. When the operating frequency of the transverse hydraulic oscillator is reduced, a second valve ball (110) is inserted into the transverse hydraulic oscillator to block the valve ball orifice flow channel (80), thereby increasing the pressure in the second flow channel (60) and squeezing the first valve ball (100). This causes the first valve ball (100) and the second valve ball (110) to fall into the ball bag (90) through the valve ball seat (70), reducing the drilling fluid flow rate into the first flow channel (50).

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