An eccentric adaptive turbine rotating guide shoe

Abstract

The present invention belongs to the field of cementing casing equipment, and proposes an eccentric adaptive turbine rotary guide shoe, including a housing, a turbine, a bearing assembly, a guide shoe head, and a water outlet channel. The guide shoe head includes a first columnar section, a second columnar section, and an eccentric conical section. The generatrix of the eccentric conical section is an arc line, and the arc center faces the inside of the guide shoe head. The eccentric conical section is provided with an adaptive mounting hole, an adaptive clamping convex, and an adaptive sliding blade. The guide shoe head is provided with an adaptive tool, and the adaptive tool includes a tooth seat body, a carbide tool head matched with the adaptive mounting hole, an adaptive clamping groove matched with the adaptive clamping convex, a tool body matched with the adaptive sliding blade, and a plurality of diamond blades distributed along the length direction of the tool body. The adaptive tool generates different swing amplitudes under different pressure conditions at its front end, and the swing amplitude is 5-12°. The present invention has reasonable design, strong eye-marking ability, is conducive to improving the efficiency of casing construction, and is suitable for large-scale promotion.

Description

Technical Field

[0001] The invention belongs to the field of cementing casing equipment, and in particular relates to an eccentric self-adaptive turbine rotary guide shoe. Background Art

[0002] The function of the casing guide shoe is to prevent the mud on the well wall from entering the casing and to guide the casing into the well. The casing shoe is part of the casing system and is located at the bottom of the casing string. It has a special structure with the upper end connected to the casing and the lower end having an internal chamfer and connected to the guide shoe by threads or other means. Encountering resistance when lowering casing is a common technical problem in cementing operations such as horizontal wells and highly deviated wells. Compared with the central guide shoe, the eccentric guide shoe can better guide the casing to the bottom of the well. The eccentric guide shoe can be divided into two types: rotating and non-rotating. Among them, the eccentric rotating guide shoe can break the resistance through the fluid dynamics pressed out from the inside of the guide shoe after encountering resistance, thereby improving the efficiency of casing lowering.

[0003] The existing patent CN201610293312.5 discloses an eccentric hydraulic rotary guide shoe, including a body, a turbine base and a guide shoe cap, wherein a second channel is provided in the turbine base, one end of the second channel is connected to a first channel provided in the body, and the other end of the second channel is connected to a confluence chamber provided in the guide shoe cap, the first channel, the second channel and the confluence chamber are coaxial, and the top of the guide shoe cap is evenly provided with a plurality of downwardly inclined outlet channels along the circumference with the axis as the center, and the confluence chamber is connected to the outlet channel. When the upper surface of the eccentric rotary guide shoe resists the irregular resistance underground, due to its relatively smooth surface and lack of a blade capable of forming a rotary cut, its eye-marking ability is insufficient, which affects the advancing efficiency of the guide shoe.

[0004] The existing patent CN220667438U discloses an eccentric vibration rotary cementing tool, including a tool body; a tool body, a stator turbine, a rotor turbine, a transmission shaft, an eccentric shaft, an eccentric block A that can be embedded, an eccentric block B that can be embedded, a guide shoe eccentric head, a limit plug, a stator retaining sleeve, a transmission key, a bearing steel ball, and a turbine retaining ring; the tool body is a hollow column, and a transmission shaft is provided in the upper center of the tool body to provide power to the equipment through flowing water, the rotor turbine is arranged on the side end face of the transmission shaft, and rotates synchronously with the transmission shaft, and the stator turbine is arranged on the inner end face of the tool body, and remains stationary with the tool body; the stator turbine blades and the rotor turbine blades are stacked adjacent to each other and do not contact each other. The guide shoe is provided with a carbide blade on the eccentric guide head, and the carbide blade can improve the eye-marking efficiency of the eccentric guide head. However, there is a certain lag between the rotary drilling working surface of the carbide blade and the front end of the guide shoe. When the guide shoe is drilled in an irregular hole, it is difficult to quickly create a gap, so there will be a brief slippage, which will directly affect the progress of the construction. Summary of the invention

[0005] In view of the technical problems existing in the above-mentioned turbine rotating guide shoe, the present invention proposes an eccentric adaptive turbine rotating guide shoe which has reasonable design, strong eye-removing capability and is beneficial to improving the efficiency of casing running construction.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is that an eccentric adaptive turbine rotating guide shoe is provided by the present invention, including a shell, a turbine is arranged inside the shell, a bearing assembly is arranged on the peripheral side of the turbine, a guide shoe head coaxially connected to the turbine is arranged at the front end of the shell, the guide shoe head is an eccentric structure and three water outlet channels are arranged on the guide shoe head, the guide shoe head includes a first columnar section rotatably nested with the shell, the first columnar section is provided with a second columnar section at an end away from the turbine, an eccentric conical section is arranged on the second columnar section, the generatrix of the eccentric conical section is an arc line and the arc center faces the inside of the guide shoe head, the eccentric top end of the eccentric conical section is provided with an adaptive mounting hole, and the adaptive mounting hole is provided with a hole wall position close to the axial direction of the guide shoe head Adaptive clamping cam, an adaptive sliding blade is arranged at the longest busbar position of the eccentric conical section, an adaptive tool is arranged on the guide shoe head, the adaptive tool comprises a tooth seat body located inside the guide shoe head, a carbide cutter head matched with the adaptive mounting hole is arranged on the top of the tooth seat body, the top of the carbide cutter head is a conical structure, an adaptive clamping groove matched with the adaptive clamping cam is arranged on the side of the carbide cutter head, a cutter body matched with the adaptive sliding blade is arranged on the side of the tooth seat body, both sides of the cutter body are slidably matched with the inner wall of the adaptive sliding blade, a part of the cutter body located outside the eccentric conical section is provided with a plurality of diamond blades distributed along the length direction of the cutter body, and the adaptive tool generates different swing amplitudes under different pressure conditions at its front end, and the swing amplitude is 5~12°.

[0007] Preferably, the top end of the adaptive mounting hole is transitioned through a rounded corner and the rounded corner is in contact with the side of the cemented carbide cutter head, the cemented carbide cutter head includes a cone head section and a column section, the adaptive slot is arranged on the column section, and the circumferential arc length of the adaptive slot and the circumferential arc length of the adaptive cam are less than 1 / 3 of the arc.

[0008] Preferably, the carbide cutter head is eccentrically mounted on the tooth seat body, the cylindrical surface of the column body section is partially coplanar with the side surface of the tooth seat body, the part of the column body section coplanar with the tooth seat body faces the direction of the shortest generatrix of the eccentric conical segment, and a limiting conical surface is provided on the side of the tooth seat body facing the longest generatrix of the eccentric conical segment.

[0009] Preferably, a fluid balance pressure groove is provided at the bottom of the gear seat body, and the fluid balance pressure groove is a conical structure.

[0010] Preferably, at least two arc-shaped guide grooves are provided on the side surface of the knife body, and the guide grooves are slidably matched with sliding blocks provided on the inner wall of the adaptive sliding knife edge.

[0011] Preferably, the bottom of the outer end surface of the knife body is in contact with the edge of the adaptive sliding knife edge when the adaptive tool is in the maximum inclination position, a movable impact plate is provided on the top of the adaptive sliding knife edge, a return spring is provided between the movable impact plate and the adaptive sliding knife edge, and the bottom of the movable impact plate is in contact with the top surface of the knife body.

[0012] Preferably, a coaxial sleeve connected to the turbine is arranged inside the first columnar segment, the top of the coaxial sleeve is a bell-mouth structure, an adaptive spring is arranged between the coaxial sleeve and the adaptive tool, the adaptive spring extends spirally toward the gear seat, and the spiral periphery of the adaptive spring contacts the adaptive tool.

[0013] Preferably, the cross-sectional trajectory of the adaptive spring is a parabola and the opening of the parabola faces away from the spiral center of the adaptive spring.

[0014] Preferably, a wear-resistant surfacing layer is provided on the outer wall of the adaptive mounting hole.

[0015] Preferably, the guide shoe head is provided with a first special-shaped trough at its shortest busbar position, and the guide shoe head is provided with a pair of second special-shaped troughs on both sides of the longest busbar position, and the three water outlet channels are respectively inclined to connect the first special-shaped trough and the two second special-shaped troughs.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are:

[0017] The present invention provides an eccentric adaptive turbine rotary guide shoe, an adaptive tool is installed on the guide shoe head, the carbide tool head at the head end has leading property, and the adaptive tool as a whole can produce unequal deflections under the pressure of its forward and rotating directions, even if the head end of the guide shoe is drilled into the hole, a gap can be quickly made, and the rotary driving action of the turbine and the fluid can effectively reduce the probability of slipping, thereby effectively improving the eye-marking efficiency of the guide shoe in the well, and then improving the efficiency of casing construction. The present invention has reasonable design, strong eye-marking ability, is conducive to improving the efficiency of casing construction, and is suitable for large-scale promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A side view of an eccentric adaptive turbine rotary guide shoe provided in an embodiment;

[0020] Figure 2 for Figure 1 A cross-sectional view of an eccentric adaptive turbine rotary guide shoe in the GG direction;

[0021] Figure 3 An axonometric view of an eccentric adaptive turbine rotary guide shoe provided in an embodiment;

[0022] Figure 4 A front view of an eccentric adaptive turbine rotary guide shoe provided in an embodiment;

[0023] Figure 5 A top view of an eccentric adaptive turbine rotary guide shoe provided in an embodiment;

[0024] Figure 6 An axonometric view of a guide shoe head provided in an embodiment;

[0025] Figure 7 A cross-sectional view of a guide shoe provided in an embodiment;

[0026] Figure 8 An axonometric view of an adaptive spring provided for an embodiment;

[0027] Fig. 9 An axonometric view of an adaptive tool provided for an embodiment;

[0028] In the above figures, 1, housing; 2, turbine; 3, bearing assembly; 4, guide shoe; 41, water outlet channel; 42, first columnar section; 43, second columnar section; 44, eccentric cone section; 45, adaptive mounting hole; 46, adaptive clamping convex; 47, adaptive sliding knife edge; 48, slider; 49, first special-shaped sink groove; 410, second special-shaped sink groove; 5, adaptive tool; 51, gear seat body; 511, limiting cone surface; 52, carbide tool head; 521, cone head section; 522, column section; 53, adaptive clamping groove; 54, tool body; 55, diamond blade; 56, fluid balance pressure groove; 57, guide groove; 6, movable impact plate; 7, coaxial sleeve; 8, adaptive spring; 9, wear-resistant surfacing layer. DETAILED DESCRIPTION

[0029] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear below, they only indicate that the upper, lower, left and right directions are consistent with the accompanying drawings themselves, and do not limit the structure.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0031] Examples, such as Figure 1-Figure 9 As shown, the present invention provides an eccentric adaptive turbine rotating guide shoe, comprising a housing 1, a turbine 2 is arranged inside the housing 1, a bearing assembly 3 is arranged on the peripheral side of the turbine 2, a guide shoe head 4 coaxially connected to the turbine 2 is arranged at the front end of the housing 1, the guide shoe head 4 is an eccentric structure and three water outlet channels 41 are arranged on the guide shoe head 4, the guide shoe head 4 includes a first columnar section 42 that is rotatably nested with the housing 1, the first columnar section 42 is provided with a second columnar section 43 at one end away from the turbine 2, and an eccentric cone section 44 is arranged on the second columnar section 43. Among them, the bearing assembly 3 is used to reduce the rotation resistance of the turbine 2 under fluid drive and ensure the synchronous rotation efficiency of the turbine 2 and the guide shoe head 4; the housing 1 provides transmission support for the turbine 2, the guide shoe head 4 and the bearing assembly 3, and is used to connect the casing lowering equipment. In order to improve the rotation performance of the guide shoe head 4, the present invention can adopt a roller structure arranged between the first columnar section 42 and the housing 1 to support the guide shoe head 4 and improve the coaxiality of the rotation of the guide shoe head 4. Furthermore, the generatrix of the eccentric conical section 44 provided by the present invention is an arc line with the arc center facing the inside of the toe cap 4, which can improve the compression and impact resistance of the shoe upper.

[0032] On this basis, in order to improve the casing lowering efficiency of the guide shoe, an adaptive mounting hole 45 is provided at the eccentric top end of the eccentric conical section 44, and an adaptive clamping protrusion 46 is provided at the hole wall position of the adaptive mounting hole 45 close to the axial direction of the guide shoe head 4, and an adaptive sliding blade 47 is provided at the longest busbar position of the eccentric conical section 44. An adaptive tool 5 is provided on the guide shoe head 4, and the adaptive tool 5 includes a tooth seat body 51 located inside the guide shoe head 4, and a carbide tool head 52 matching the adaptive mounting hole 45 is provided on the top of the tooth seat body 51. The top of the carbide cutter head 52 is a conical structure, and the side of the carbide cutter head 52 is provided with an adaptive groove 53 that cooperates with the adaptive protrusion 46. The side of the gear seat body 51 is provided with a cutter body 54 that cooperates with the adaptive sliding edge 47. The two sides of the cutter body 54 slide with the inner wall of the adaptive sliding edge 47. The part of the cutter body 54 located outside the eccentric conical section 44 is provided with a plurality of diamond blades 55 distributed along the length direction of the cutter body 54. The adaptive tool 5 produces different swing amplitudes under different pressure conditions at its front end, and the swing amplitude is 5~12°.

[0033] Specifically, the carbide cutter head 52 at the very end of the adaptive tool 5 has a leading property, which can improve the rotary drilling in irregular downhole environments; at the same time, the outer side surface of the tool body 54 protrudes from the upper surface of the guide shoe head 4, and the diamond blade 55 installed on its surface can play a role in high-speed turning, and the curved surface where its generatrix is ​​located directly bears the eye-marking resistance, especially under greater pressure, the tool body 54 and the adaptive sliding blade edge 47 maintain a relatively uniform generatrix taper, and the inclination angle of the carbide cutter head 52 is toward the central axis direction of the guide shoe. While the adaptive tool 5 rotates synchronously with the guide shoe head 4, it maintains a certain eccentricity and a certain turning ability, thereby obtaining a higher eye-marking efficiency. Furthermore, when the carbide head enters an irregular hole, the extrusion force acting on the unit length of the curved surface where the generatrix of the cutter body 54 is located is different. The adaptive cutter 5 as a whole can produce unequal deflections under the pressure of its forward and rotational directions. In addition, the rotational torque of the guide shoe facilitates the rapid creation of a gap at the hole position sufficient for the carbide head to return to the original rotational trend, effectively reducing the probability of slippage, thereby effectively improving the eye-marking efficiency of the guide shoe in the well, and further improving the efficiency of casing construction. In the process of the adaptive cutter 5 generating a deflection, the adaptive slot 53 on the carbide cutter head 52 can enter the adaptive cam 46, and the convex shapes of the two make the center of the carbide cutter head 52 deviate from the center of the original position, and the carbide cutter head 52 generates a planar motion in the adaptive mounting hole 45 but does not leave the adaptive mounting hole 45; at the same time, the cutter body 54 slides along the adaptive sliding cutter edge 47, and the edge of the adaptive sliding cutter edge 47 provides the cutter body 54 with the upper and lower swing limit nodes, which plays a role in preventing slippage and enhancing the pressure resistance. Therefore, the adaptive tool 5 cooperates with the adaptive mounting hole 45 and the adaptive sliding knife edge 47 to keep synchronous rotation and forward movement with the guide shoe head 4, and has good anti-slip performance and high eye-marking ability, which greatly improves the leading efficiency of the casing lowering device.

[0034] In order to improve the eye-marking capability of the adaptive tool 5, the top of the adaptive mounting hole 45 provided by the present invention is transitioned through a rounded corner and the rounded corner contacts and cooperates with the side of the carbide tool head 52. The carbide tool head 52 includes a cone head section 521 and a column section 522. The adaptive slot 53 is arranged on the column section 522. The circumferential arc length of the adaptive slot 53 and the circumferential arc length of the adaptive cam 46 are less than 1 / 3 of the arc. Among them, the convex surface of the adaptive cam 46 is a curved surface, and its thickest position is located at the top of the longest generatrix close to the eccentric cone section 44. Its curved surface extends to both sides to a limited extent, and the thickness is also reduced; the groove depth and notch of the adaptive slot 53 should be slightly larger than the adaptive cam 46, so as to make room for the corresponding swing amplitude under pressure, and if the adaptive cam 46 contacts the bottom edge of the adaptive slot 53, it can play a role in preventing it from falling off. In this way, when the carbide cutter head 52 makes planar motion, in addition to the adaptive cam 46 and the adaptive slot 53 making room for the column body section 522 to make planar motion, the rounded corners provide pressure-resistant support for the column body section 522 and ensure that the cylindrical section can complete flexible amplitude switching under pressure, thereby providing hardware support for efficient eye-marking.

[0035] Furthermore, the carbide cutter head 52 is eccentrically mounted on the gear seat body 51, the cylindrical surface of the column body section 522 is partially coplanar with the side surface of the gear seat body 51, the portion of the column body section 522 coplanar with the gear seat body 51 faces the direction of the shortest generatrix of the eccentric conical section 44, and a limiting conical surface 511 is provided on the side of the gear seat body 51 facing the longest generatrix of the eccentric conical section 44. In this case, when the upper groove edge of the adaptive slot 53 is in slight contact with the adaptive locking protrusion 46, the part on the same surface of the column body section 522 and the tooth seat body 51 is abutted against the inner wall of the shortest generatrix of the eccentric conical section 44, playing a supporting role, and can effectively resist the high pressure from the forward direction; when the lower groove edge of the adaptive slot 53 is in a pressing fit with the adaptive locking protrusion 46, the limiting cone surface 511 of the tooth seat body 51 is abutted against the inner wall of the longest generatrix of the eccentric conical section 44, because the high pressure received by the carbide cutter head 52 in the process of rushing out of the hole and the dead corner is resisted, the resistance-breaking ability of the guide shoe of the present invention is improved, which is beneficial to improving the eye-marking efficiency of the guide shoe.

[0036] like Figure 2 As shown, since the adaptive cutter 5 is continuously subjected to high pressure in its forward direction during the reaming process, in order to improve the dynamic balance of the adaptive cutter 5, a fluid balance pressure groove 56 is provided at the bottom of the tooth holder body 51 of the present invention, and the fluid balance pressure groove 56 is a conical structure. The fluid balance pressure groove 56 can collect a part of the fluid impact pressure, and the high pressure of the circulating medium pumped into the well by the casing lowering equipment can balance a part of the external forward resistance, so that the adaptive cutter 5 has a tendency to restore balance while generating deviation under multi-faceted pressure conditions, thereby obtaining a better reaming ability.

[0037] like Figure 7 and Fig. 9 As shown, at least two arc-shaped guide grooves 57 are provided on the side of the cutter body 54 of the present invention, and the guide grooves 57 are slidably matched with the slider 48 provided on the inner wall of the adaptive sliding knife mouth 47. The cutter body 54 can stably deflect along the matching direction of the slider 48 and the guide groove 57 during the process of floating with the adaptive cutter 5 as a whole, and the guide groove 57 also plays the role of swing limit, which is beneficial to reduce the pressure of the adaptive cutter 5 on the limit node, and is beneficial to prolong the actual service life of the guide shoe.

[0038] like Figure 2 As shown, in order to improve the relative sealing of the upper of the shoe, the bottom of the outer end face of the blade body 54 of the present invention is in contact with the edge of the adaptive sliding knife mouth 47 when the adaptive tool 5 is at the maximum inclination position, and the bottom of the inner end face of the blade body 54 is in contact with the edge of the adaptive sliding knife mouth 47 when the adaptive tool 5 is at the minimum inclination position. The two connection points are used to improve the limit support and also play a role in sealing connection; at the same time, a movable collision plate 6 is arranged on the top of the adaptive sliding knife mouth 47, and a reset spring (not shown in the figure) is arranged between the movable collision plate 6 and the adaptive sliding knife mouth 47, and the bottom of the movable collision plate 6 is in contact with the top surface of the blade body 54. The movable collision plate 6 always rests on the top of the blade body 54 under the action of the reset spring. In this way, at the moment when the blade body 54 is deflected with the adaptive tool 5, the blade body 54 and the adaptive sliding knife mouth 47 can maintain dynamic sealing, reduce the probability of backflow of the underground circulating fluid medium, and to a certain extent, it is also conducive to improving the high-speed turning ability of the diamond blade 55 on the blade body 54.

[0039] like Figure 2 and Figure 8 As shown, in order to improve the dynamic balance performance of the adaptive tool 5, the present invention is provided with a coaxial sleeve 7 connected to the turbine 2 inside the first columnar section 42, the top of the coaxial sleeve 7 is a bell-mouth structure, and an adaptive spring 8 is provided between the coaxial sleeve 7 and the adaptive tool 5. The adaptive spring 8 spirally extends toward the tooth seat, and the spiral extension direction is eccentrically extended along the eccentric direction of the guide shoe head to obtain a better support effect, and the spiral periphery of the adaptive spring 8 is in contact with the adaptive tool 5. Among them, the bell mouth can play a role in limiting the inner circle of the adaptive spring 8, and the end and spiral periphery of the adaptive spring 8 can effectively support the adaptive tool 5, provide internal support for the adaptive tool 5, and have both the effect of preventing the adaptive tool 5 from falling off and improving the dynamic balance of the adaptive tool 5.

[0040] Furthermore, the cross-sectional trajectory of the adaptive spring 8 is a parabola, and the parabola opening faces away from the spiral center of the adaptive spring 8. The parabolic fracture of the adaptive spring 8 can provide more supporting nodes for the adaptive tool 5, and on the other hand, it can make a part of the circulating fluid medium form a spiral jet inside the guide shoe 4, which can support the adaptive spring 8 and the adaptive tool 5 at the same time, and the volume of the spiral jet changes flexibly with the compression of the adaptive spring 8, which is conducive to improving the dynamic support effect of the medium inside the guide shoe 4 and the mechanical structure on the adaptive tool 5.

[0041] In order to improve the eye-marking performance of the guide shoe, the present invention provides a wear-resistant cladding layer 9 on the outer wall of the adaptive mounting hole 45. The wear resistance and erosion resistance of the front end of the guide shoe head 4 are improved by designing the wear-resistant cladding layer 9.

[0042] like Figure 1-Figure 5 As shown, the guide shoe head 4 provided by the present invention is provided with a first special-shaped sink 49 at its shortest generatrix position, and the guide shoe head 4 is provided with a pair of second special-shaped sinks 410 on both sides of the longest generatrix position, and the three water outlet channels 41 are respectively connected obliquely to the first special-shaped sink 49 and the two second special-shaped sinks 410. Among them, the first special-shaped sink 49 and the second special-shaped sink 410 have similar structures, and the shape on the second columnar section 43 is a partial cylindrical curved surface, and the part on the eccentric conical section 44 is a parabolic structure; the first special-shaped sink 49 and the second special-shaped sink 410 can form a certain space margin in conjunction with the curvature of the second columnar section 43 and the eccentric conical section 44, so as to facilitate the underground circulating fluid medium to flush the geological components in the eye-marking direction, which is conducive to forming a continuous circulation channel, thereby improving the casing running capability of the equipment.

[0043] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. An eccentric adaptive turbine rotary guide shoe, comprising a housing, a turbine is arranged inside the housing, a bearing assembly is arranged on the peripheral side of the turbine, a guide shoe head coaxially connected to the turbine is arranged at the front end of the housing, the guide shoe head is an eccentric structure and is provided with three water outlet channels, the guide shoe head comprises a first columnar section rotatably nested with the housing, the first columnar section is provided with a second columnar section at an end away from the turbine, and an eccentric conical section is arranged on the second columnar section, characterized in that: The generatrix of the eccentric conical segment is an arc and the center of the arc faces the inside of the guide shoe head. An adaptive mounting hole is provided at the eccentric top end of the eccentric conical segment, and an adaptive clamping convex is provided at the hole wall position of the adaptive mounting hole close to the axial direction of the guide shoe head. An adaptive sliding blade is provided at the longest generatrix position of the eccentric conical segment, and an adaptive tool is provided on the guide shoe head. The adaptive tool comprises a tooth seat body located inside the guide shoe head, a carbide cutter head matched with the adaptive mounting hole is provided at the top of the tooth seat body, the top of the carbide cutter head is a conical structure, an adaptive clamping groove matched with the adaptive clamping convex is provided on the side of the carbide cutter head, a cutter body matched with the adaptive sliding blade is provided on the side of the tooth seat body, and both sides of the cutter body are slidably matched with the inner wall of the adaptive sliding blade, and the part of the cutter body located outside the eccentric conical segment is provided with a plurality of diamond blades distributed along the length direction of the cutter body, and the adaptive tool generates different swing amplitudes under different pressures at its front end, and the swing amplitude is 5~12°.

2. The eccentric adaptive turbine rotary guide shoe according to claim 1, characterized in that: The top end of the adaptive mounting hole is transitioned through a rounded corner and the rounded corner is in contact with the side of the cemented carbide cutter head. The cemented carbide cutter head includes a cone head section and a column section. The adaptive slot is arranged on the column section. The circumferential arc length of the adaptive slot and the circumferential arc length of the adaptive cam are less than 1 / 3 of the arc.

3. The eccentric adaptive turbine rotary guide shoe according to claim 2, characterized in that: The carbide cutter head is eccentrically mounted on the tooth seat body, the cylindrical surface of the column body section is partially coplanar with the side surface of the tooth seat body, the part of the column body section coplanar with the tooth seat body faces the direction of the shortest generatrix of the eccentric conical segment, and a limiting conical surface is provided on the side of the tooth seat body facing the longest generatrix of the eccentric conical segment.

4. The eccentric adaptive turbine rotary guide shoe according to claim 3 is characterized in that: A fluid balance pressure groove is arranged at the bottom of the gear seat body, and the fluid balance pressure groove is a conical structure.

5. An eccentric adaptive turbine rotary guide shoe according to any one of claims 1 to 4, characterized in that: At least two arc-shaped guide grooves are arranged on the side surface of the knife body, and the guide grooves are slidably matched with the sliding blocks arranged on the inner wall of the adaptive sliding knife opening.

6. The eccentric adaptive turbine rotary guide shoe according to claim 5, characterized in that: The bottom of the outer end surface of the knife body is in contact with the edge of the adaptive sliding knife edge when the adaptive tool is at the maximum inclination angle. A movable impact plate is provided on the top of the adaptive sliding knife edge. A return spring is provided between the movable impact plate and the adaptive sliding knife edge. The bottom of the movable impact plate is in contact with the top surface of the knife body.

7. The eccentric adaptive turbine rotary guide shoe according to claim 1, characterized in that: A coaxial sleeve connected to the turbine is arranged inside the first columnar segment, the top of the coaxial sleeve is a bell-mouth structure, an adaptive spring is arranged between the coaxial sleeve and the adaptive tool, the adaptive spring extends spirally toward the gear seat, and the spiral periphery of the adaptive spring contacts the adaptive tool.

8. The eccentric adaptive turbine rotary guide shoe according to claim 7, characterized in that: The cross-sectional trajectory of the adaptive spring is a parabola, and the parabola opening faces away from the spiral center of the adaptive spring.

9. The eccentric adaptive turbine rotary guide shoe according to claim 1, characterized in that: A wear-resistant surfacing layer is arranged on the outer wall of the adaptive mounting hole.

10. The eccentric adaptive turbine rotary guide shoe according to claim 1, characterized in that: The guide shoe head is provided with a first special-shaped trough at its shortest busbar position, and the guide shoe head is provided with a pair of second special-shaped troughs on both sides of the longest busbar position. The three water outlet channels are respectively obliquely connected to the first special-shaped trough and the two second special-shaped troughs.

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