Vibration reduction rotary steering tool

Abstract

The invention provides a vibration reduction rotary steering tool which comprises a connector, and the connector comprises an upper connector body and a lower connector body. The upper connector is connected with the rotary guiding short section, and the lower connector is connected with the drill bit. A buffering groove is formed in the outer side, close to the lower connector, of the upper connector, a protruding part is arranged on the inner side, close to the upper connector, of the lower connector, and the length of the buffering groove is larger than that of the protruding part. The groove bottom of the buffer groove is in contact with the convex surface of the convex part; a first damper spring and / or a second damper spring are / is installed between the upper connector and the lower connector. The damping spring is arranged between the upper connector and the lower connector, so that the anti-vibration performance of the whole device can be enhanced, and the performance is more stable when the device works.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of oilfield drilling engineering technology, and particularly relates to a damping rotary steering tool. BACKGROUND

[0002] In the drilling process, a rotary steering system is usually used to guide the drilling tool. Compared with a sliding steering drilling system, the rotary steering drilling system has the ability to adjust the inclination and azimuth at will in the process of rotary drilling, and has many advantages such as small friction and torsional resistance, high drilling speed, short well construction period, smooth and easy-to-control well trajectory, and the like. Therefore, the rotary steering drilling system provides an effective solution for developing thin oil reservoirs, drilling extended reach wells, long horizontal wells, multi-lateral wells and other high-difficulty special technology wells. Many oil companies have developed various rotary steering drilling systems with commercial application value, which have brought great economic and social benefits and brought a qualitative leap to the development of drilling technology.

[0003] However, for the existing rotary steering tool, the connection position is usually near the drill bit. When the drilling string torque transmission efficiency is low, the torque required by the downhole drill bit to break rock is greater than the torque transmitted by the rotary table, the drill bit is prone to jamming and stopping, and then a twisted and viscous state occurs in which the upper half of the drilling string system rotates and the lower half is stationary. The longer the time of this state, the greater the energy accumulated in the drilling string system and the drill bit. When the critical state is exceeded, the drill bit escapes from the viscous state, and the entire bottom hole assembly releases a large amount of accumulated energy instantaneously, causing the drill bit to rotate at high speed to cut rock. After the energy is released, the drill bit returns to the initial state until it is stopped again and enters the next twisted and viscous state. The above process is repeated, forming a stick-slip vibration effect on the entire drilling string system, which causes the stability of the rotary steering tool to be prone to problems. SUMMARY

[0004] In view of the above problems, the present application provides a damping rotary steering tool, which comprises a connecting head,

[0005] The connecting head comprises an upper joint and a lower joint;

[0006] The upper joint is connected with a rotary steering short section, and the lower joint is connected with a drill bit;

[0007] A buffer groove is arranged on the outer side of the upper joint close to the lower joint,

[0008] A protruding portion is arranged on the inner side of the lower joint close to the upper joint,

[0009] The length of the buffer groove is greater than the length of the protruding portion; the groove bottom of the buffer groove is in contact with the protruding surface of the protruding portion;

[0010] First damping springs and / or second damping springs are installed between the upper joint and the lower joint.

[0011] Preferably, it further comprises an energy-absorbing block,

[0012] An energy-absorbing block is mounted at one end of the first damping spring close to the upper joint.

[0013] Preferably, at least one wing rib is slidably mounted on the outside of the rotary steering short section along the circumferential direction of the rotary steering short section; the wing rib is driven by a hydraulic system;

[0014] The hydraulic system is arranged inside the rotary steering short section.

[0015] Preferably, the damping rotary steering tool further comprises a tension spring, one end of which is connected to the wing rib, and the other end of which is fixedly connected to the rotary steering short section; the tension spring is used to reset the wing rib.

[0016] Preferably, the damping rotary steering tool further comprises an annular stopper,

[0017] The annular stopper is arranged at the edge of the contact surface between the wing rib and the rotary steering short section, and is located outside the tension spring; the annular stopper can contact the rotary steering short section to achieve sealing;

[0018] A sealing groove is arranged on the outside of the rotary steering short section corresponding to the position of the annular stopper;

[0019] The annular stopper is slidably mounted in the sealing groove, and the length of the annular stopper is greater than the distance by which the wing rib is spread.

[0020] Preferably, it further comprises a power generation short section, which is connected to the rotary steering short section and located on the side of the rotary steering short section away from the drill bit; a liquid flow channel is arranged inside the power generation short section, and a turbine generator is mounted in the liquid flow channel.

[0021] Preferably, it further comprises a measurement and transmission short section, which is fixedly connected to the rotary steering short section and located on the side of the rotary steering short section away from the drill bit; a sensor for detecting the attitude of the drill bit is arranged inside the measurement and transmission short section.

[0022] Preferably, a flow guide groove is arranged on the upper surface of the rotary steering short section, and the flow guide groove is located between two adjacent wing ribs.

[0023] Preferably, the hydraulic system comprises an oil storage chamber, which is arranged inside the steering short section;

[0024] The outlet of the oil storage chamber is connected to the inlet of a booster pump, the outlet of the booster pump is connected to the inlet of a one-way valve, and the outlet of the one-way valve is connected to a hydraulic chamber; the hydraulic chamber is arranged inside the rotary steering short section.

[0025] A piston chamber is arranged in the hydraulic chamber and communicates with the hydraulic chamber;

[0026] A driving piston is slidably arranged in the piston chamber and connected with the wing rib;

[0027] A pressure relief channel is arranged between the oil storage chamber and the hydraulic chamber, and an electromagnetic valve is arranged in the pressure relief channel.

[0028] Preferably, the hydraulic system further comprises an oil injection hole arranged on the rotary steering short joint, the oil injection hole communicates with the oil storage chamber, and a on-off mechanism is arranged on the oil injection hole.

[0029] Beneficial effects:

[0030] 1. The application can enhance the anti-vibration performance of the whole device and make the device work more stably by arranging the damping spring between the upper joint and the lower joint.

[0031] 2. The device is connected with the drill pipe and lowered into the well, and the corresponding hydraulic system is controlled to work to make the wing rib open and the drill bit generate lateral force to realize the build-up of inclination according to the measurement data of the measurement short joint during the build-up of inclination.

[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 upon examination of the following or can be learned by practice of the application. The objects and other advantages of the application can be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended 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 embodiments or the 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 based on these drawings.

[0034] Figure 1 The overall structure of the damping rotary steering tool in the embodiment of the present application is shown;

[0035] Figure 2 The structure of the A-A section in the embodiment of the present application is shown; Figure 1

[0036] Figure 3 The enlarged structure of the B part in the embodiment of the present application is shown; Figure 1

[0037] Figure 4 The enlarged structure of the B part in the embodiment of the present application is shown; Figure 1 ​​A structural diagram of section C;

[0038] Figure 5 As described in the embodiments of the present invention Figure 1 A structural diagram of section D;

[0039] In the diagram, 1-rotary guide section; 2-generator section; 3-measuring and transmitting section; 4-drill bit; 5-solenoid valve; 6-oil injection port; 7-turbine generator; 8-MWD wireless drilling transmitter; 9-rotary guide measurement module; 10-oil reservoir; 11-hydraulic chamber; 12-piston chamber; 13-drive piston; 14-wing rib; 15-reset groove; 16-tension spring; 17-annular stop; 18-sealing groove; 19-guide groove; 20-fluid flow channel; 21-motor; 22-booster pump; 23-check valve; 24-connector; 25-upper connector; 26-lower connector; 27-first damping spring; 28-second damping spring; 29-energy absorption block; 251-buffer groove; 261-protrusion. Detailed Implementation

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

[0041] In conjunction with embodiments of the present invention, such as Figure 1 and Figure 5 As shown, Figure 1 A schematic diagram of the overall structure of the vibration-damping rotary guide tool in an embodiment of the present invention is shown; Figure 5 As described in the embodiments of the present invention Figure 1 A schematic diagram of part D; a vibration-damping rotary guide tool, including a connector 24, the connector 24 including an upper connector 25 and a lower connector 26; the upper connector 25 is connected to the lower connector 26, and the lower connector 26 is connected to the rotary guide section 3; a buffer groove 251 is provided on the outer side of the upper connector 25 near the lower connector 26, and a protrusion 261 is provided on the inner side of the lower connector 26 near the upper connector 25.

[0042] The length of the buffer groove 251 is greater than the length of the protrusion 261 (ensuring buffer space); the bottom of the buffer groove 251 is in contact with the protruding surface of the protrusion 261.

[0043] A first damping spring 27 and / or a second damping spring 28 are installed between the upper connector 25 and the lower connector 26.

[0044] Specifically, the lower connector 26 has a protrusion 261 on its inner side. A first damping spring 27 is connected to one end of the protrusion 261 near the upper connector 25. The other end of the first damping spring 27 is connected to one side of the buffer groove 251. A second damping spring 28 is connected to the end of the protrusion 261 away from the upper connector 25. The second damping spring 28 is connected to the opposite side of the buffer groove 251. With the cooperation of the protrusion 261 and the buffer groove 251, and under the action of the first damping spring 27 and the second damping spring 28, the vibrations experienced by the measuring and transmitting section 3, the power generation section 2, and the rotary guide section 1 (vibrations caused by the drill bit 4 and its operation) can be reduced, resulting in better stability and a longer service life.

[0045] In the implementation of this invention, such as Figure 5 As shown, it also includes energy-absorbing block 29.

[0046] An energy-absorbing block 29 is installed at one end of the first damping spring 27 near the upper connector 25. The energy stored in the spring is absorbed by the energy-absorbing block 29. In this embodiment, an energy-absorbing block 29 is provided at one end of the first damping spring 27, and the other end of the energy-absorbing block 29 is connected to the protrusion 261. The energy-absorbing block 29 is made of an energy-absorbing material. Alternatively, energy-absorbing blocks 29 can be provided at both ends of the first damping spring 27. The energy-absorbing block 29 can convert mechanical energy into heat energy. The energy-absorbing block 29 is made of rubber. Since there are many energy-absorbing materials used for damping, they will not be described in detail here.

[0047] In the implementation of this invention, such as Figure 1 and Figure 5 As shown, Figure 1 A schematic diagram of the overall structure of the vibration-damping rotary guide tool in an embodiment of the present invention is shown; Figure 3 As described in the embodiments of the present invention Figure 1 Enlarged structural schematic diagram of part B; at least one rib 14 is slidably installed on the outside of the rotary guide section 1 along the circumferential direction of the rotary guide section 1; the rib 14 is driven by a hydraulic system;

[0048] The hydraulic system is located inside the rotary guide section 1.

[0049] Currently, there are many hydraulic systems on the market that can be used to control the opening and closing of the rib 14, but these usually have certain problems, such as requiring the motor to provide power continuously. Therefore, in this embodiment, a new hydraulic system is proposed.

[0050] In most cases, the number of ribs 14 needs to be more than 2, so as to facilitate the steering of the drill bit 4. At the same time, the more the number of ribs 14, the more accurate the steering angle of the drill bit 4, but the higher the requirement for the material, so in this embodiment, three ribs 14 are provided, which are evenly arranged on the rotary steering short section 1 in the circumferential direction, so as to meet the steering requirements of most cases. When three ribs 14 are provided, the corresponding hydraulic system also has three sets, and the hydraulic system and the rib are one-to-one corresponding.

[0051] In the above embodiment, optionally another embodiment is that the damping rotary steering tool further comprises a tension spring 16, the tension spring 16 is connected with the rib 14, and the other end of the tension spring 16 is fixedly connected with the rotary steering short section 1; the tension spring 16 is used for resetting the rib 14.

[0052] In many cases, in order to make the rib 14 reset smoothly and stably when needed, two tension springs 16 are usually arranged, the two tension springs 16 are located on both sides of the reset rib 14, and a corresponding reset groove 15 is also arranged on the rotary steering short section 1, one tension spring 16 is arranged in the reset groove 15, one end of the tension spring 16 is connected with the reset groove 15, and the other end of the tension spring 16 is connected with the rib 14, and the tension spring 16 is in a stretched state at all times. When the hydraulic chamber 11 is depressurized, the rib 14 can be reset through the tension spring 16.

[0053] In the above embodiment, optionally another embodiment is that the damping rotary steering tool further comprises an annular stopper 17,

[0054] The annular stopper 17 is arranged at the edge of the contact surface between the rib 14 and the rotary steering short section 1; and the annular stopper 17 is located outside the tension spring 16; the annular stopper 17 can contact the rotary steering short section 1 to realize sealing;

[0055] A sealing groove 18 is arranged on the outer side of the rotary steering short section 1 corresponding to the position of the annular stopper 17;

[0056] The opening distance of the rib 14 refers to the maximum distance of the rib 14 away from the rotary steering short section 1 driven by the hydraulic system;

[0057] The annular stopper 17 is slidingly installed in the sealing groove 18, and the length of the annular stopper 17 is greater than the opening distance of the rib 14.

[0058] Specifically, since the wing ribs 14 need to be close to the well wall when being opened, a large amount of rock debris will enter the gap between the wing ribs 14 and the rotary steering sub 1, which causes certain difficulty in resetting the wing ribs 14, therefore, in the embodiment, an annular stopper 17 is arranged at the edge of the contact surface of the wing ribs 14 and the rotary steering sub 1, the shape and size of the annular stopper 17 are the same as those of the contact surface of the wing ribs 14 and the rotary steering sub 1; meanwhile, a sealing groove 18 matched with the annular stopper 17 is arranged on the outer surface of the rotary steering sub 1, and even if the opening degree of the wing ribs 14 reaches the maximum, the annular stopper 17 still cooperates with the sealing groove 18, so that the rock debris cannot enter between the wing ribs 14 and the rotary steering sub 1.

[0059] As shown in the embodiment of the present application, Figure 1 As shown in the embodiment of the present application, Figure 1 The overall structure of the vibration-reducing rotary steering tool in the embodiment of the present application is shown in the figure; the figure also shows a power generation sub 2, the power generation sub 2 is connected with the rotary steering sub 1, and the power generation sub 2 is located on the side of the rotary steering sub 1 away from the drill bit 4; a liquid flow channel 20 is arranged inside the power generation sub 2, and a turbine generator 7 is installed in the liquid flow channel 20.

[0060] The power generation sub 2 is arranged because both the rotary steering sub 1 and the measurement transmission sub 3 need to use electricity, but the electricity consumption is not very large, and the cost of directly sending in the cable from the wellhead is too high, therefore, power generation is directly performed in the downhole in the embodiment, since the drilling fluid will pass through the liquid flow channel 20 to enter the drill bit, therefore, a turbine generator 7 is arranged in the liquid flow channel 20 in the middle of the power generation sub 2, when the drilling fluid passes, the turbine generator 7 will be driven to rotate, thereby generating electricity.

[0061] As shown in the embodiment of the present application, Figure 1 As shown in the embodiment of the present application, Figure 1 The overall structure of the vibration-reducing rotary steering tool in the embodiment of the present application is shown in the figure; the figure also shows a measurement transmission sub 3, the measurement transmission sub 3 is fixedly connected with the rotary steering sub 1, and the measurement transmission sub 3 is located on the side of the rotary steering sub 1 away from the drill bit 4; a sensor for detecting the posture of the drill bit is arranged inside the measurement transmission sub 3.

[0062] For the measurement transmission sub 3, the main function is to measure the posture parameters of the whole system, and whether steering is needed is determined according to the parameters, the sensors usually include a MWD wireless drilling transmission instrument 8 and a rotary steering measurement module 9, which are common devices in the field, therefore, the structure thereof will not be described here, of course, a corresponding control system is also arranged on the measurement transmission sub, the control system controls the opening and closing of the components in the hydraulic system according to the measurement data obtained by the MWD wireless drilling transmission instrument 8 and the rotary steering measurement module 9.

[0063] As shown in the embodiment of the present application,Figure 1 and Figure 2 as shown, Figure 1 shows the overall structure of the damping rotary steering tool in the embodiment of the application; Figure 2 for the embodiment of the application Figure 1 shows the structure of the A-A section in the embodiment of the application; the flow guide groove 19 is arranged on the rotary steering sub 1 and is located between two adjacent wing ribs 14.

[0064] Due to the arrangement of the wing rib 14, the channel of the drilling fluid mixed with the cuttings becomes small when returning, which makes it easy to be blocked. In order to prevent this problem, the embodiment further comprises a corresponding flow guide groove 19 arranged between two adjacent wing ribs 14, which is used to compensate for the problem of the small channel caused by the wing rib 14.

[0065] In combination with the embodiment of the application, as Figure 1 and Figure 4 as shown, Figure 1 shows the overall structure of the damping rotary steering tool in the embodiment of the application; Figure 4 for the embodiment of the application Figure 1 shows the structure of the C part in the embodiment of the application; the hydraulic system comprises an oil storage chamber 10 located inside the steering sub 1;

[0066] The outlet of the oil storage chamber 10 is connected with the inlet of the booster pump 22, the outlet of the booster pump 22 is connected with the inlet of the one-way valve 23, and the outlet of the one-way valve 23 is connected with the hydraulic chamber 11; the booster pump 22 is driven by the motor 21; in the above case, the motor 21 can be started to control the opening of the wing rib 14, but in the process, the motor 21 needs to be kept rotating at all times, and as known by those skilled in the art, the motor 21 will consume a large amount of electric energy during long-time operation. In order to reduce the consumption of electric energy, a one-way valve 23 is further arranged between the booster pump 22 and the hydraulic chamber 11, so that the hydraulic oil can only return to the oil storage chamber 10 through the booster pump 22; when the opening degree of the wing rib 14 reaches the requirement, the motor 21 can be turned off to reduce the consumption of electric energy.

[0067] The piston chamber 12 is arranged in the hydraulic chamber 11 and is in communication with the hydraulic chamber 11;

[0068] Preferably, three piston chambers 12 are arranged on each hydraulic chamber 11, and three hydraulic chambers 11 correspondingly install three driving pistons 13;

[0069] The driving piston 13 is slidably installed in the piston chamber 12; the driving piston 13 is connected with the wing rib 14;

[0070] A relief passage is arranged between the oil storage chamber 10 and the hydraulic chamber 11, and an electromagnetic valve 5 is arranged in the relief passage. When needed, the electromagnetic valve 5 is controlled to relieve the hydraulic chamber 11; the hydraulic chamber 11 is arranged in the rotary steering short section 1.

[0071] The oil storage chamber 10, the hydraulic chamber 11, the piston chamber 12 and the relief passage are all arranged in the rotary steering short section 1; through the oil storage chamber 10, the booster pump 22, the hydraulic chamber 11, the piston chamber 12 and the driving piston 13, the rising and falling of the wing ribs 14 can be controlled to control the steering of the whole device.

[0072] In the above case, when the wing ribs 14 need to be controlled to open, the motor 21 is started, but in the process, the motor 21 needs to be kept rotating at all times, and as known by those skilled in the art, the motor 21 will consume a large amount of electric energy during long-time operation. In order to reduce the consumption of electric energy, a one-way valve 23 is further arranged between the booster pump 22 and the hydraulic chamber 11, so that the hydraulic oil can only return to the oil storage chamber 10 through the booster pump 22; when the opening degree of the wing ribs 14 reaches the requirement, the motor 21 can be turned off to reduce the consumption of electric energy; in order to reduce the pressure of the hydraulic oil in the hydraulic chamber 11 when needed, a passage is further arranged between the hydraulic chamber 11 and the oil storage chamber 10, and an electromagnetic valve 5 is further arranged on the passage; when needed, the electromagnetic valve 5 is controlled to relieve the hydraulic chamber 11.

[0073] In the above embodiment, optionally, another embodiment is that the hydraulic system further comprises an oil injection hole 6 arranged on the rotary steering short section 1, the oil injection hole 6 is in communication with the oil storage chamber 10, and an on-off mechanism is arranged on the oil injection hole 6. The on-off mechanism is a valve, a one-way valve 23 or a plug, and the valve, the one-way valve 23 or the plug is installed in the oil injection hole 6; the on-off mechanism is arranged to prevent the hydraulic oil or high-pressure gas from flowing out; through the oil injection hole 6, fresh hydraulic oil can be supplemented, and at the same time, a certain amount of high-pressure gas can be injected into the oil storage chamber 10 through the oil injection hole 6.

[0074] Those skilled in the art can understand that in order to realize the operation of the motor 21 and the electromagnetic valve 5, a corresponding controller needs to be arranged, which can control the opening and closing of the motor 21 and the electromagnetic valve 5 according to the measurement results of the measurement and transmission short section 3 and actual needs. The function of such a controller is relatively simple, and many controllers can realize the operation at present, such as a single-chip microcomputer, and therefore the results are not described here.

[0075] In use, the device is connected with a drill pipe and is lowered into a well, and when steering is not needed, the working mode is the same as that of a conventional working mode; when deflecting is needed, the corresponding hydraulic system is controlled to work according to the measurement data of the measurement and transmission short section to make the wing ribs open to make the drill bit generate a lateral force, thereby realizing deflecting.

[0076] Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood that modifications can be made to the foregoing embodiments, or additional implementations can be implemented, without departing from the spirit and scope of the inventive subject matter. Accordingly, the present application is not limited to the implementations described herein, but is intended to be defined by the claims set forth below, and equivalents thereof.

Claims

1. A vibration-damping rotary steerable tool, characterized in that, The connecting head (24) comprises an upper joint (25) and a lower joint (26); The upper joint (25) is connected with the rotary steering short section (1), and the lower joint (26) is connected with the drill bit (4); A buffer groove (251) is arranged on the outer side of the upper joint (25) close to the lower joint (26), A protruding part (261) is arranged on the inner side of the lower joint (26) close to the upper joint (25), The length of the buffer groove (251) is greater than the length of the protruding part (261); the groove bottom of the buffer groove (251) is in contact with the protruding surface of the protruding part (261); First damping springs 27 and / or second damping springs 28 are installed between the upper joint (25) and the lower joint (26). An energy-absorbing block (29) is further included, 2. The vibration-damping rotary steerable tool of claim 1, wherein, The energy-absorbing block (29) is installed at one end of the first damping spring (27) close to the upper joint (25). At least one wing rib (14) is slidably installed on the outer side of the rotary steering short section (1) along the circumferential direction of the rotary steering short section (1); the wing rib (14) is driven by a hydraulic system; 3. The vibration-damping rotary steerable tool of claim 1, wherein, The hydraulic system is arranged inside the rotary steering short section (1). The damping rotary steering tool further comprises a tension spring (16) connected with the wing rib (14), and the other end of the tension spring (16) is fixedly connected with the rotary steering short section (1); the tension spring (16) is used for resetting the wing rib (14).

4. The vibration-damping rotary steerable tool of claim 3, wherein, The damping rotary steering tool further comprises an annular stop block (17), 5. The vibration-damping rotary steerable tool of claim 4, wherein, The annular stop block (17) is arranged at the edge of the contact surface between the wing rib (14) and the rotary steering short section (1), and the annular stop block (17) is located outside the tension spring (16); the annular stop block (17) can be in contact with the rotary steering short section (1) to achieve sealing; A sealing groove (18) is arranged on the outer side of the rotary steering short section (1) corresponding to the position of the annular stop block (17); The annular stop block (17) is slidably installed in the sealing groove (18), and the length of the annular stop block (17) is greater than the distance of the opening of the wing rib (14). Further comprising a power generation short section (2), the power generation short section (2) is connected with the rotary steering short section (1), and the power generation short section (2) is located on the side of the rotary steering short section (1) away from the drill bit (4); a liquid flow channel (20) is arranged inside the power generation short section (2), and a turbine generator (7) is installed in the liquid flow channel (20).

6. The vibration-damping rotary steerable tool of claim 1, wherein, Further comprising a measurement and transmission short section (3), the measurement and transmission short section (3) is fixedly connected with the rotary steering short section (1), and the measurement and transmission short section (3) is located on the side of the rotary steering short section (1) away from the drill bit (4); a sensor for detecting the attitude of the drill bit is arranged inside the measurement and transmission short section (3).

7. The vibration-damping rotary steerable tool of claim 1, wherein, A flow guide groove (19) is arranged on the upper surface of the rotary steering short section (1), and the flow guide groove (19) is located between two adjacent wing ribs (14).

8. A vibration-damping rotary steerable tool according to any one of claims 4-7, characterized in that, The hydraulic system comprises an oil storage chamber (10) arranged inside the steering short section (1).

9. The vibration-damping rotary steerable tool of claim 3, wherein, ​ The outlet of the oil storage chamber (10) is connected with the inlet of a booster pump (22), the outlet of the booster pump (22) is connected with the inlet of a one-way valve (23), and the outlet of the one-way valve (23) is connected with the hydraulic chamber (11); the hydraulic chamber (11) is arranged inside the rotary steering sub (1); A piston chamber (12) is arranged in the hydraulic chamber (11), and the piston chamber (12) is communicated with the hydraulic chamber (11); A driving piston (13) is slidably arranged in the piston chamber (12), and the driving piston (13) is connected with the wing rib (14); A pressure relief channel is arranged between the oil storage chamber (10) and the hydraulic chamber (11), and an electromagnetic valve (5) is arranged in the pressure relief channel.

10. The vibration-damping rotary steerable tool of claim 9, wherein, The hydraulic system further comprises an oil injection hole (6) arranged on the rotary steering sub (1), the oil injection hole (6) is communicated with the oil storage chamber (10), and an on-off mechanism is arranged on the oil injection hole (6).

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