A high-power hydraulically driven drillable rotary guide shoe

Abstract

The present invention relates to the technical field of guide shoes. The present invention provides a high-power hydraulically driven drillable rotary guide shoe, comprising a housing, a hydraulic motor and a shoe head. The stator is arranged on the inner wall of the housing and has a spiral drive cavity in the center. The rotor is rotatably arranged in the drive cavity and has a gap between it and the inner wall of the drive cavity. The gap is used to allow drilling fluid to pass through to drive the rotor to rotate. The shoe head is rotatably arranged at the end of the housing and is connected to the rotor drive. The shoe head has a fluid outlet hole, which is used to discharge the drilling fluid discharged from the gap into the shoe head into the wellbore. The rotor has a drainage channel along the length direction, and the outer wall of the rotor has a drainage hole. The top cover of the drainage channel is provided with a blasting plate, and the bottom end is connected to the drainage hole. The blasting plate can be broken by drilling fluid when the shoe head is stuck, so that the drilling fluid can be discharged and no longer drives the hydraulic motor. The above technical solution solves the technical problem in the related art that the fluid pressure cannot be released after the guide shoe is stuck, which is easy to cause mechanical damage.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of guide shoes, and in particular to a high-power hydraulically driven drillable rotary guide shoe. Background Art

[0002] Drilling operations, a critical step in oil production, involve numerous complex technologies and equipment. After drilling is complete, casing must be inserted into the wellbore to ensure wellbore stability, prevent wellbore collapse, and provide access for subsequent extraction operations.

[0003] The guide shoe is typically connected to the lower end of the casing string, and its primary function is to guide the casing smoothly into the wellbore. Currently, guide shoes are mostly hydraulically driven, meaning drilling fluid is introduced into the guide shoe, and the fluid's kinetic energy is used to drive a hydraulic motor. The hydraulic motor then rotates the guide shoe's toe, which cleans the inner wall of the wellbore, creating favorable conditions for the smooth lowering of the casing. At the same time, after driving the hydraulic motor, the drilling fluid flows into the toe and out through pre-set holes in the toe. During this process, the drilling fluid carries cuttings from the wellbore back to the surface, reducing the risk of pipe sticking and ensuring the smooth progress of drilling operations.

[0004] However, when encountering large foreign objects such as rocks during drilling, the drill can easily become stuck. Once stuck, the guide shoe's toe becomes blocked by the foreign object and cannot rotate, and the rotor of the connected hydraulic motor also cannot continue to rotate. However, if the drilling fluid supply cannot be stopped in time, the fluid pressure in the drilling fluid cannot be released through rotational work, which can easily cause mechanical damage to components such as the hydraulic motor, increasing equipment replacement and maintenance costs, affecting drilling progress, and even causing serious downhole accidents.

[0005] Therefore, it is of great practical significance to develop a high-power hydraulically driven drillable rotary guide shoe that can effectively deal with drill sticking and avoid mechanical damage caused by fluid pressure accumulation. Summary of the Invention

[0006] To overcome the above-mentioned defects, an embodiment of the present invention provides a high-power hydraulically driven drillable rotary guide shoe, which solves the technical problem in the related art that the fluid pressure cannot be released after the guide shoe is stuck and easily causes mechanical damage.

[0007] According to one aspect, at least one embodiment of the present invention provides a high-power hydraulically driven drillable rotary guide shoe, comprising a housing, a hydraulic motor, and a shoe head. The hydraulic motor comprises a stator and a rotor. The stator is disposed on the inner wall of the housing and has a spiral drive cavity at its center. The rotor is rotatably disposed within the drive cavity and has a gap between it and the inner wall of the drive cavity. The gap is used to allow drilling fluid to pass through to drive the rotor to rotate. The shoe head is rotatably disposed at the bottom end of the housing and can rotate under the drive of the rotor. The shoe head has a fluid outlet for discharging drilling fluid.

[0008] The rotor has an axially penetrating leakage channel, and the rotor peripheral wall has a leakage hole. The top cover of the leakage channel is provided with a bursting plate, and the bottom end is connected to the leakage hole. The bursting plate can be broken by drilling fluid when the toe is stuck, so that the drilling fluid can be discharged and the drive of the hydraulic motor can be stopped.

[0009] For example, at least one embodiment of the present invention provides a high-power hydraulically driven drillable rotary guide shoe, further comprising:

[0010] A transmission assembly is arranged between the hydraulic motor and the shoe head, and the transmission assembly includes a transmission cylinder, a transmission joint and a universal coupling. The transmission cylinder is rotatably arranged in the housing, and the transmission joint is arranged at the bottom end of the transmission cylinder. The transmission joint has a guide hole, and the guide hole is used to discharge the drilling fluid into the shoe head. The rotor is eccentrically arranged in the drive cavity, and the universal coupling is arranged in the transmission cylinder, and its two ends are used to connect the rotor and the transmission joint.

[0011] For example, at least one embodiment of the present invention provides a high-power hydraulically driven drillable rotary guide shoe, further comprising:

[0012] The shell has a locking cavity located below the driving cavity for the top end of the transmission cylinder to be inserted. The diameter of the locking cavity gradually decreases from top to bottom. A plurality of circumferentially spaced locking blocks are slidingly arranged in the locking cavity. A locking roller that rolls with the outer wall of the transmission cylinder is rotatably arranged on the locking block. A spring 1 is connected between the inner wall of the locking cavity and the locking block. The spring 1 is used to elastically press the locking block downward so that the locking roller on the locking block rolls and presses against the outer wall of the transmission cylinder.

[0013] For example, at least one embodiment of the present invention provides a high-power hydraulically driven drillable rotary guide shoe, further comprising:

[0014] A rotating shaft extending downward into the toe cap is rotatably provided on the transmission joint, a radially extending support rod is provided on the outer periphery of the rotating shaft, a striking head is provided on the support rod for sliding radially along the toe cap, and the striking head can slide outward to strike the inner wall of the toe cap to cause the toe cap to vibrate.

[0015] For example, at least one embodiment of the present invention provides a high-power hydraulically driven drillable rotary guide shoe, further comprising:

[0016] A second spring is connected between the support rod and the striking head, and the second spring is used to provide a force for the striking head to approach the inner wall of the toe. The inner wall of the toe is provided with a guide inclined surface that extends circumferentially and gradually protrudes toward the axial side of the toe. The striking head can move along the guide inclined surface under the drive of the rotating shaft and compress the second spring so as to elastically strike the inner wall of the toe when it leaves the guide inclined surface.

[0017] For example, at least one embodiment of the present invention provides a high-power hydraulically driven drillable rotary guide shoe, further comprising:

[0018] The outer periphery of the rotating shaft is provided with propeller blades, and the guide hole faces the propeller blades. The propeller blades can rotate driven by the drilling fluid discharged from the guide hole and drive the rotating shaft to rotate. The rotating shaft and the transmission joint have opposite directions.

[0019] For example, at least one embodiment of the present invention provides a high-power hydraulically driven drillable rotary guide shoe, further comprising:

[0020] The guide hole is conical, and its diameter gradually decreases from top to bottom.

[0021] For example, at least one embodiment of the present invention provides a high-power hydraulically driven drillable rotary guide shoe, further comprising:

[0022] A thrust bearing and a centering bearing are provided between the housing and the transmission cylinder. The centering bearings are in two groups and are respectively located on the upper and lower sides of the thrust bearing.

[0023] For example, at least one embodiment of the present invention provides a high-power hydraulically driven drillable rotary guide shoe, further comprising:

[0024] A bursting cap is threadedly mounted on the top of the rotor, and the bursting cap is used to press the bursting plate to the top of the rotor to block the leakage channel.

[0025] For example, at least one embodiment of the present invention provides a high-power hydraulically driven drillable rotary guide shoe, further comprising:

[0026] An axially extending side cutter is provided on the outer peripheral wall of the toe cap, and a convex point for scraping the inner wall of the wellbore is provided on the side edge of the side cutter.

[0027] The beneficial effects of the embodiments of the present invention are:

[0028] In the present invention, during normal drilling operations, drilling fluid enters the hydraulic motor and flows into the gap between the stator and the rotor. Due to the spiral shape of the drive chamber, the drilling fluid generates a tangential force on the rotor during its flow, driving the rotor to rotate. (The principle of the hydraulic motor in this solution refers to the screw-type hydraulic motor commonly used in the drilling field of the prior art.) The rotor synchronously drives the toe to rotate, cleaning the inner wall of the wellbore and creating conditions for the smooth insertion of the casing. At the same time, the drilling fluid after driving the hydraulic motor is discharged into the interior of the toe and discharged through the fluid outlet on the toe. In this process, it carries the rock cuttings in the wellbore and circulates back to the ground, reducing the risk of drill sticking.

[0029] If the toe of the shoe becomes blocked by a large rock or other foreign object during drilling, it cannot rotate, causing the rotor to stop. However, the drilling fluid continues to flow. Since the rotor has stopped rotating, the drilling fluid cannot release pressure through normal rotational work. When the pressure reaches the limit of the rupture plate, the rupture plate is breached. At this point, the drilling fluid escapes through the drainage channel and drainage holes, no longer driving the rotor, thus preventing mechanical damage to components such as the hydraulic motor caused by excessive pressure.

[0030] By setting up a discharge channel and a bursting plate on the rotor, when encountering a drill sticking situation, the pressure accumulated in the drilling fluid can be released in time, avoiding mechanical damage to the stator, rotor and other related components of the hydraulic motor caused by excessive pressure, reducing the need for downhole maintenance or replacement operations due to equipment failure, reducing the risk of downhole accidents, and ensuring the smooth progress of drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly describes the drawings required for describing the embodiments of the present invention. Obviously, the drawings described below are merely exemplary embodiments of the present invention. Those skilled in the art can, without inventive effort, derive other drawings based on the contents of the exemplary embodiments of the present invention and these drawings.

[0032] Figure 1 A schematic diagram of the appearance of a high-power hydraulically driven drillable rotary guide shoe in one embodiment of the present invention;

[0033] Figure 2 for Figure 1 A schematic diagram of the internal structure of a high-power hydraulically driven drillable rotary guide shoe in an embodiment;

[0034] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0035] Figure 4 for Figure 1 A schematic structural diagram of a stator in an embodiment of the present invention;

[0036] Figure 5 for Figure 1 A schematic structural diagram of a rotor in an embodiment of the present invention;

[0037] Figure 6 for Figure 1 Schematic diagram of the structure of the transmission assembly in the embodiment.

[0038] In the figure: 1. Housing; 2. Hydraulic motor; 3. Shoe head; 201. Stator; 202. Rotor; 203. Drive chamber; 301. Liquid outlet; 2021. Drainage channel; 2022. Drainage hole; 4. Bursting plate; 5. Transmission assembly; 501. Transmission cylinder; 502. Transmission joint; 503. Universal joint; 504. Guide hole; 6. Locking chamber; 7. Locking block; 8. Locking roller; 9. Spring 1; 10. Rotating shaft; 11. Support rod; 12. Striking head; 14. Spring 2; 302. Guide ramp; 15. Propeller blade; 16. Thrust bearing; 17. Centering bearing; 18. Bursting cap; 19. Side cutter. DETAILED DESCRIPTION

[0039] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention.

[0040] To simplify the drawings, only portions relevant to the invention are schematically depicted in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one component with the same structure or function is schematically depicted or labeled. In this document, "one" not only means "only one" but also "more than one," and "several" includes "two" and "more than two."

[0041] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0042] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0043] In the description of this embodiment, the terms "up", "down", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0044] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0045] like Figures 1 to 6 The figure shows a high-power hydraulically driven drillable rotary guide shoe according to one embodiment of the present invention, comprising a housing 1, a hydraulic motor 2, and a shoe head 3. The hydraulic motor 2 comprises a stator 201 and a rotor 202. The housing 1 is the main support structure of the entire guide shoe and is cylindrical in shape, providing installation space for the hydraulic motor 2 and the shoe head 3. The stator 201 is fixedly mounted on the inner wall of the housing 1, with a spiral drive chamber 203 designed in the center, which can guide the flow direction of the drilling fluid and generate driving force for the rotor 202. The rotor 202 is rotatably arranged in the drive chamber 203, with a certain gap between it and the inner wall of the drive chamber 203. The rotor 202 is provided with a drainage channel 2021 along its length, and a drainage hole 2022 is provided on the outer wall of the rotor 202, so that the bottom end of the drainage channel 2021 is connected to the drainage hole 2022. The blasting plate 4 covers the top of the drainage channel 2021 and can withstand the pressure of the drilling fluid during normal drilling. However, if the shoe head 3 is blocked and the drilling fluid pressure increases, it can be broken through, thereby opening the drainage channel 2021 and allowing the drilling fluid to drain. The shoe head 3 is rotatably mounted on the end of the housing 1 and is driven by the rotor 202. The shoe head 3 is provided with liquid outlet holes 301.

[0046] Working principle: During normal drilling operations, drilling fluid enters the hydraulic motor 2 and flows into the gap between the stator 201 and the rotor 202. Since the drive chamber 203 is spiral, the drilling fluid will generate a tangential force on the rotor 202 during the flow process, driving the rotor 202 to rotate. (The principle of the hydraulic motor 2 in this solution refers to the screw-type hydraulic motor commonly used in the drilling field of the prior art) The rotor 202 synchronously drives the shoe head 3 to rotate, cleaning the inner wall of the wellbore and creating conditions for the smooth penetration of the casing. At the same time, the drilling fluid after driving the hydraulic motor 2 is discharged into the interior of the shoe head 3 and discharged through the liquid outlet 301 on the shoe head 3. In this process, the rock cuttings in the wellbore are carried back to the ground for circulation, reducing the risk of drill sticking.

[0047] When a foreign object such as a large rock blocks the toe cap 3 during drilling, it becomes unable to rotate, causing rotor 202 to stop rotating. However, drilling fluid is still being supplied. Since rotor 202 has stopped rotating, the drilling fluid cannot release pressure through normal rotational work. When the pressure reaches the limit of blasting plate 4, blasting plate 4 is breached. At this point, the drilling fluid drains through drain channel 2021 and drain hole 2022, no longer generating driving force on rotor 202, thus preventing mechanical damage to components such as hydraulic motor 2 caused by excessive pressure.

[0048] By providing a discharge channel 2021 and a blasting plate 4 on the rotor 202, when a drill is stuck, the pressure accumulated in the drilling fluid can be released in time, thereby avoiding mechanical damage to the stator 201, rotor 202 and other related components of the hydraulic motor 2 caused by excessive pressure, reducing the need for downhole maintenance or replacement operations due to equipment failure, reducing the risk of downhole accidents, and ensuring the smooth progress of drilling.

[0049] In some examples, such as Figure 2 and Figure 6 As shown, a cylindrical transmission cylinder 501 is rotatably mounted within the housing 1. A transmission joint 502 is disposed within the transmission cylinder 501 and is provided with a diversion hole 504, ensuring that drilling fluid discharged from the hydraulic motor 2 is discharged into the shoe head 3 through the diversion hole 504. A universal joint 503 connects the rotor 202 and the transmission joint 502 at both ends, respectively. Because the rotor 202 is eccentrically positioned within the drive chamber 203, the universal joint 503 compensates for axis deviation caused by the eccentricity, ensuring that the rotational power of the rotor 202 is transmitted to the transmission joint 502.

[0050] The housing 1 is provided with a locking cavity 6 for inserting the transmission cylinder 501. The locking cavity 6 is tapered, its diameter gradually decreasing as it moves away from the hydraulic motor 2. Multiple locking blocks 7 are slidably mounted on the inner wall of the locking cavity 6. Locking rollers 8 are rotatably mounted on these locking blocks 7. These rollers extend from the surface of the locking blocks 7 and are designed to contact the outer wall of the transmission cylinder 501, rolling on it as the transmission cylinder 501 rotates. A spring 9 is connected between the inner wall of the locking cavity 6 and the locking blocks 7, providing a force that forces the locking blocks 7 to slide away from the hydraulic motor 2, ensuring that the locking rollers 8 maintain contact with the outer wall of the transmission cylinder 501.

[0051] Working Principle: During shoe operation, rotor 202 of hydraulic motor 2, driven by drilling fluid, begins to rotate. Universal coupling 503 transmits power from rotor 202 to transmission connector 502, thereby driving shoe head 3 to rotate and clean the borehole interior. Simultaneously, drilling fluid, after exiting hydraulic motor 2, enters transmission cylinder 501 through guide hole 504 in transmission connector 502, ultimately draining into shoe head 3 and out through outlet hole 301 there, carrying rock cuttings back to the surface.

[0052] During operation, when drilling fluid enters the transmission cylinder 501, it will apply thrust to the transmission cylinder 501, the transmission joint 502 and the shoe head 3. When the thrust is too large, it may cause the above-mentioned components to detach from the shell 1. For this reason, in this embodiment, when installing the transmission cylinder 501, the transmission cylinder 501 is inserted into the locking cavity 6. As the transmission cylinder 501 is inserted, its end will push the locking block 7, causing the spring 1-9 to be compressed, and the locking block 7 to move toward the end with a larger diameter of the locking cavity 6. After the transmission cylinder 501 is fully inserted into the locking cavity 6, the spring 1-9 pushes the locking block 7 to move toward the end with a smaller diameter of the locking cavity 6. The locking roller 8 on the locking block 7 will abut the outer wall of the transmission cylinder 501. During the shoe guiding operation, the transmission cylinder 501 is driven to rotate by the rotor 202, and the locking roller 8 rolls on the surface of the transmission cylinder 501.

[0053] When the drilling fluid exerts a strong thrust on the transmission cylinder 501, causing it to move away from the hydraulic motor 2, the locking chamber 6 has a tapered structure, and the transmission cylinder 501 moves toward the smaller end of the locking chamber 6. This causes the locking block 7, under the action of the tapered inner wall of the locking chamber 6, to further force the locking roller 8 to press more tightly against the outer wall of the transmission cylinder 501. This self-locking mechanism effectively prevents the transmission cylinder 501, transmission joint 502, and shoe head 3 from accidentally detaching from the housing 1 due to the strong thrust of the drilling fluid, thereby ensuring the structural stability of the guide shoe under high-pressure environments.

[0054] In some examples, such as Figure 2 and Figure 6As shown, a rotating shaft 10 is rotatably provided at the end center of the transmission joint 502, and the rotating shaft 10 extends to the inside of the toe 3, and a support rod 11 is provided on the outer peripheral wall thereof. A slidable knocking head 12 is provided on the support rod 11 along the radial direction of the toe 3. Spring 2 14 is connected between the support rod 11 and the knocking head 12 to provide the knocking head 12 with a force to continuously approach the inner wall of the toe 3. On the inner wall of the toe 3, a guide bevel 302 is provided along the moving trajectory of the knocking head 12, and the guide bevel 302 extends circumferentially and gradually protrudes toward the axial center side of the toe 3. A propeller blade 15 is provided on the outer peripheral wall of the rotating shaft 10, and the guide hole 504 faces the propeller blade 15 and has a conical structure, thereby enhancing the jet of the drilling fluid discharged from the guide hole 504 and more effectively driving the propeller blade 15 to rotate.

[0055] Working principle: When drilling fluid is discharged from the guide hole 504 on the transmission joint 502, the drilling fluid impacts the propeller blade 15, which begins to rotate and drives the rotating shaft 10 to rotate, and the rotating shaft 10 rotates in the opposite direction to the transmission joint 502. The rotation of the rotating shaft 10 causes the striking head 12 on the support rod 11 to move along the circumferential direction of the inner wall of the toe cap 3. When the striking head 12 moves to the position of the guide bevel 302, the guide bevel 302 will exert a radial inward squeezing force on the striking head 12, causing the striking head 12 to gradually move away from the inner wall of the toe cap 3, while compressing the spring 2 14 and storing the elastic potential energy of the spring 2 14. When the striking head 12 leaves the guide bevel 302, the elastic potential energy of the spring 2 14 is instantly released, causing the striking head 12 to quickly approach and strike the inner wall of the toe cap 3 under the elastic force of the spring 2 14, thereby causing the toe cap 3 to vibrate.

[0056] On the one hand, the vibration of the toe cap 3 can help to impact the cuttings adhering to the surface of the toe cap 3, thereby separating them from the surface of the toe cap 3 and preventing the accumulation of cuttings on the surface of the toe cap 3. On the other hand, the vibration of the toe cap 3 can enhance the scraping effect of the inner wall of the wellbore, loosening the cuttings adhering to the wellbore wall, increasing the agitation of the cuttings in the wellbore, preventing the cuttings from accumulating in the wellbore to form a cuttings bed, and ensuring that the drilling fluid can more effectively carry the cuttings to the surface.

[0057] In some examples, such as Figure 2 and Figure 6As shown, a thrust bearing 16 is disposed between the housing 1 and the transmission cylinder 501. This not only ensures the rotational connection between the transmission cylinder 501 and the housing 1, but also withstands a certain amount of axial thrust from the drilling fluid, ensuring the stability and reliability of power transmission. Two sets of centering bearings 17 are located on either side of the thrust bearing 16. Their primary function is to center the transmission cylinder 501, ensuring that it remains coaxial with the housing 1 during rotation and reducing wear. A blasting cap 18 is threadedly mounted on the end of the rotor 202. This blasting cap 18 is used to press the blasting plate 4 against the top of the drain channel 2021, facilitating its installation and ensuring its stability. Side cutters 19 are provided on the outer peripheral wall of the shoe head 3. These cutters 19 effectively scrape the inner wall of the wellbore. Raised points are also provided on the surface of the side cutters 19 to increase the scraping force between the side cutters 19 and the wellbore wall, enhancing the effectiveness of wellbore cleaning.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A high-power hydraulically driven drillable rotary guide shoe, characterized in that: The invention comprises a housing (1), a hydraulic motor (2) and a shoe head (3), wherein the hydraulic motor (2) comprises a stator (201) and a rotor (202), wherein the stator (201) is arranged on the inner wall of the housing (1) and has a spiral driving cavity (203) at the center, wherein the rotor (202) is rotatably arranged in the driving cavity (203) and has a gap between the rotor (202) and the inner wall of the driving cavity (203), wherein the gap is used for introducing drilling fluid to drive the rotor (202) to rotate, wherein the shoe head (3) is rotatably arranged at the bottom end of the housing (1) and can rotate under the drive of the rotor (202), and wherein the shoe head (3) has a liquid outlet (301) for discharging the drilling fluid; The rotor (202) has an axially penetrating discharge channel (2021), and a peripheral wall of the rotor (202) has a discharge hole (2022). The top end cover of the discharge channel (2021) is provided with a bursting plate (4), and the bottom end is connected to the discharge hole (2022). The bursting plate (4) can be broken by drilling fluid when the toe cap (3) is blocked, so that the drilling fluid is discharged and the driving of the hydraulic motor (2) is stopped.

2. A high-power hydraulically driven drillable rotary guide shoe according to claim 1, characterized in that: The invention also includes a transmission assembly (5) arranged between the hydraulic motor (2) and the shoe head (3), wherein the transmission assembly (5) includes a transmission cylinder (501), a transmission joint (502) and a universal joint (503), wherein the transmission cylinder (501) is rotatably arranged in the housing (1), the transmission joint (502) is arranged at the bottom end of the transmission cylinder (501), and the transmission joint (502) has a guide hole (504), and the guide hole (504) is used to discharge drilling fluid into the shoe head (3), the rotor (202) is eccentrically arranged in the drive chamber (203), and the universal joint (503) is arranged in the transmission cylinder (501), and its two ends are used to connect the rotor (202) and the transmission joint (502).

3. A high-power hydraulically driven drillable rotary guide shoe according to claim 2, characterized in that: The housing (1) has a locking cavity (6) located below the driving cavity (203) for the top end of the transmission cylinder (501) to be inserted, the diameter of the locking cavity (6) gradually decreases from top to bottom, a plurality of circumferentially spaced locking blocks (7) are slidingly arranged in the locking cavity (6), a locking roller (8) that is rotatably arranged on the locking block (7) and is in rolling engagement with the outer wall of the transmission cylinder (501), a spring (9) is connected between the inner wall of the locking cavity (6) and the locking block (7), the spring (9) being used to elastically press the locking block (7) downward so that the locking roller (8) on the locking block (7) rolls against the outer wall of the transmission cylinder (501).

4. A high-power hydraulically driven drillable rotary guide shoe according to claim 2, characterized in that: A rotating shaft (10) extending downward into the shoe toe (3) is rotatably provided on the transmission joint (502), a radially extending support rod (11) is provided on the outer periphery of the rotating shaft (10), and a striking head (12) is provided on the support rod (11) for sliding along the radial direction of the shoe toe (3), and the striking head (12) can slide outward to strike the inner wall of the shoe toe (3), thereby causing the shoe toe (3) to vibrate.

5. A high-power hydraulically driven drillable rotary guide shoe according to claim 4, characterized in that: A second spring (14) is connected between the support rod (11) and the striking head (12). The second spring (14) is used to provide a force for the striking head (12) to approach the inner wall of the toe (3). A guide inclined surface (302) extending circumferentially and gradually protruding toward the axial center of the toe (3) is provided on the inner wall of the toe (3). The striking head (12) can move along the guide inclined surface (302) under the drive of the rotating shaft (10) and compress the second spring (14), so as to elastically strike the inner wall of the toe (3) when it leaves the guide inclined surface (302).

6. A high-power hydraulically driven drillable rotary guide shoe according to claim 4, characterized in that: A propeller blade (15) is provided on the outer periphery of the rotating shaft (10), and the guide hole (504) faces the propeller blade (15). The propeller blade (15) can rotate under the drive of the drilling fluid discharged from the guide hole (504), and drive the rotating shaft (10) to rotate, and the rotation direction of the rotating shaft (10) is opposite to that of the transmission joint (502).

7. A high-power hydraulically driven drillable rotary guide shoe according to claim 6, characterized in that: The guide hole (504) is conical, and its diameter gradually decreases from top to bottom.

8. The high-power hydraulically driven drillable rotary guide shoe according to claim 2, characterized in that: A thrust bearing (16) and a centering bearing (17) are provided between the housing (1) and the transmission cylinder (501). The centering bearings (17) are in two groups and are respectively located on the upper and lower sides of the thrust bearing (16).

9. The high-power hydraulically driven drillable rotary guide shoe according to claim 1, characterized in that: A bursting cap (18) is threadedly mounted on the top end of the rotor (202), and the bursting cap (18) is used to press the bursting plate (4) to the top end of the rotor (202) to block the leakage channel (2021).

10. The high-power hydraulically driven drillable rotary guide shoe according to claim 1, characterized in that: An axially extending side cutter (19) is provided on the outer peripheral wall of the toe cap (3), and a convex point for scraping the inner wall of the wellbore is provided on the side edge of the side cutter (19).

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