Turbine type reaming guide shoe assembly

Abstract

The invention discloses a turbine type redressing guide shoe assembly which comprises a connector, a turbine section, a rupture disc piece, a supporting section and a redressing guide shoe head, the connector, the turbine section, the rupture disc piece and the supporting section are all in a straight tube shape, the lower end of the connector is used for being connected and communicated with the tail end of a sleeve, the upper end of the turbine section is connected and communicated with the lower end of the connector, and the redressing guide shoe head is connected with the turbine section. The lower end of the turbine section is connected and communicated with the upper end of the supporting section, the redressing guiding shoe head is coaxially installed at the lower end of the supporting section, the rupture disc is located in the connector and installed on the turbine section, and the turbine section drives the redressing guiding shoe head to rotate through the supporting section under the action of drilling fluid so as to correct the well wall. In this way, after the upper end of the connector is in butt joint with the lower end of the sleeve, drilling fluid is introduced through the sleeve at the moment, the turbine section drives the supporting section and the reaming guide shoe head to coaxially rotate under the action of the flowing drilling fluid with pressure, the well wall is corrected through the reaming guide shoe head, and the sleeve is guided to smoothly enter a well.

Description

Technical Field

[0001] The present invention belongs to the technical field of eyelet guide shoes, and in particular to a turbine eyelet guide shoe assembly. Background Technology

[0002] For extended reach wells or long horizontal wells, the casing is difficult to run into place mainly because the friction resistance of the long horizontal section is large, which hinders the running of the casing. Of course, the horizontal section of the wellbore may have shrinkage, collapse and other wellbore wall instability factors, which makes it difficult to run the casing. If the well is not cleared, the casing running operation may not be completed. CN110439484A "A kind of impact rotary eye-reaming shoe guide device" and CN204266947U "A kind of rotary eye-reaming shoe guide device" are not suitable for the horizontal section of the horizontal well. SUMMARY OF THE INVENTION

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a turbine-type reaming shoe assembly which has a simple structure and can drive the reaming shoe head to rotate at a high speed and with a large torque when the drilling fluid is introduced, so as to carry out well repair treatment with the well wall.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a turbine-type reaming guide shoe assembly, comprising a joint, a turbine section, a rupture disk, a support section and a reaming guide shoe head, wherein the joint, the turbine section, the rupture disk and the support section are all in the shape of a straight cylinder, the lower end of the joint is used to connect and communicate with the end of the casing, the upper end of the turbine section is connected and communicated with the lower end of the joint, the lower end of the turbine section is connected and communicated with the upper end of the support section, the reaming guide shoe head is coaxially mounted at the lower end of the support section, the rupture disk is located in the joint and mounted on the turbine section, and the turbine section drives the reaming guide shoe head to rotate through the support section under the action of drilling fluid to correct the wellbore wall.

[0005] The beneficial effect of the above technical solution is that after the upper end of the joint is butted with the lower end of the casing, the drilling fluid is introduced through the casing, and the turbine section drives the support section and the reaming shoe head to rotate coaxially under the action of the pressurized and flowing drilling fluid, so that the reaming shoe head can correct the well wall and guide the casing to be smoothly lowered into the well.

[0006] In the above technical solution, the turbine section includes a turbine section housing and a turbine section shaft that are both tubular and vertically arranged. The turbine section shaft is coaxially rotatably installed in the turbine section housing through a support bearing, and there is a first annular space between the turbine section shaft and the turbine section housing. A turbine ring fixed on the turbine section shaft is coaxially arranged in the first annular space. The upper end of the turbine section housing is coaxially connected to the corresponding end of the joint. The rupture disc member is installed at the upper end of the turbine section shaft to block the upper end of the turbine section shaft. The turbine ring drives the turbine section shaft to rotate under the drive of the drilling fluid, and the turbine section shaft drives the support section and the reaming shoe head to rotate.

[0007] The beneficial effect of the above technical solution is that in this way, the rupture disc member blocks the upper end of the turbine section shaft, and all the drilling fluid flows downward through the first annular space, and the turbine ring drives the turbine section shaft to rotate, and the turbine section shaft drives the support section and the reaming shoe head to rotate.

[0008] In the above technical solution, a plurality of support bearings and turbine rings are provided. The plurality of support bearings and the plurality of turbine rings are vertically spaced apart in the first annular space.

[0009] The beneficial effect of the above technical solution is that its structure is simple, and the stability of the turbine section shaft when rotating in the turbine section sleeve is good. At the same time, a plurality of turbine rings drive the turbine section shaft to rotate under the drive of the drilling fluid, and its driving force is large, and finally the rotation torque of the reaming shoe head is large.

[0010] In the above technical solution, the lower end of the turbine section shaft has circumferentially spaced liquid through holes for the drilling fluid to flow into the turbine section shaft through the first annular space.

[0011] The beneficial effect of the above technical solution is that in this way, the drilling fluid in the first annular space can enter the support section through the liquid through holes and finally enter the slurry outlet on the reaming shoe head and be discharged into the well.

[0012] In the above technical solution, the lower end of the turbine section shaft is expanded in diameter so that its outer wall is close to the inner wall of the turbine section housing, so as to contract the first annular space into an annular gap.

[0013] The beneficial effect of the above technical solution is that this makes a small amount of drilling fluid seep out through the annular gap.

[0014] In the above technical solution, the support section includes a support section shell, a support section shaft, and a lower end cover, all of which are tubular. The support section shaft is coaxially disposed inside the support section shell, and there is a second annular space between the two. The support section shaft is rotatably connected to the support section shell through a bearing member located in the second annular space. The lower end cover is located at the inner lower end of the second annular space and is coaxially and fixedly connected to the inner wall of the support section shell, and is in sealed and rotational contact with the support section shaft. The lower end of the support section shaft is coaxially connected and communicated with the upper end of the hole-opening guide shoe head. The upper end of the support section shell is coaxially and fixedly connected to the lower end of the turbine section shell, and the upper end of the support section shaft is coaxially and fixedly connected to the lower end of the turbine section shaft.

[0015] The beneficial effect of the above technical solution is that: in this way, the support section shaft can rotate relative to the support section shell, and the support section shaft drives the hole-opening guide shoe head to rotate under the drive of the turbine section shaft. At this time, the drilling fluid seeping out from the annular gap lubricates and cools the bearing member, thereby improving the service life of the bearing member.

[0016] In the above technical solution, the bearing member includes a centralizing bearing and a thrust bearing. The centralizing bearing and the thrust bearing are both arranged in the second annular space, and the thrust bearing is located between the centralizing bearing and the lower end cover.

[0017] The beneficial effect of the above technical solution is that: its structure is simple, and the rotational connection between the support section shaft and the support section shell is more stable.

[0018] In the above technical solution, the support section further includes a tubular centralizer, and the centralizer is coaxially sleeved on the lower end of the support section shell.

[0019] The beneficial effect of the above technical solution is that: in this way, the stability of the lower end of the support section shell is better, and the support section can be corrected in the well, which is beneficial for the hole-opening guide shoe head to be centered in the well.

[0020] In the above technical solution, the lower end of the support section shaft extends out of the support section shell.

[0021] The beneficial effect of the above technical solution is that: in this way, the connection between the hole-opening guide shoe head and the lower end of the support section shaft is more convenient and is not affected by the support section shell.

[0022] The above technical solution further includes a bowl-shaped cementing plug. The cementing plug is used to be lowered into the joint through the casing after the wellbore is corrected, and its bowl mouth faces downward and seals the upper end of the first annular space.

[0023] The beneficial effects of the above technical solution are as follows: After the wellbore correction is completed, the cementing plug is directly lowered into the joint through the casing, so that the cementing plug seals the upper end of the first annular space. Then, the cement slurry is lowered through the casing. After the lower rubber plug is broken by the cement slurry, the rupture disc part is pressed until it ruptures, thereby opening the upper end of the turbine joint shaft. At this time, the cement slurry directly discharges through the slurry outlet on the turbine joint shaft, the support joint shaft and the reaming guide shoe into the annular gap between the casing and the wellbore for cementing treatment. Brief Description of the Drawings

[0024] Figure 1 Side view of the turbine reaming guide shoe assembly according to an embodiment of the present invention;

[0025] Figure 2 Cross-sectional view of the turbine reaming guide shoe assembly according to an embodiment of the present invention;

[0026] Figure 3 Cross-sectional view of the turbine joint in an embodiment of the present invention;

[0027] Figure 4 Cross-sectional view of the support joint in an embodiment of the present invention;

[0028] Figure 5 Side view of the centralizer in an embodiment of the present invention;

[0029] Figure 6 Cross-sectional view of the rupture disc part in an embodiment of the present invention;

[0030] Figure 7 Partial cross-sectional view of the turbine ring in a vertical view state in an embodiment of the present invention.

[0031] In the figure: 1, joint; 2, turbine joint; 21, turbine joint housing; 22, turbine joint shaft; 221, liquid through hole; 23, support bearing; 24, turbine ring; 241, inner ring; 242, outer ring; 243, blade; 25, first annular space; 3, rupture disc part; 31, rupture disc housing; 311 flange ring; 32, rupture disc seat; 321, outer flange; 322, embedding hole; 33, rupture disc; 331, cylinder seat; 332, sealing piece; 4, support joint; 41, support joint housing; 42, support joint shaft; 43, lower end cover; 44, bearing part; 441, centralizing bearing; 442, thrust bearing; 45, second annular space; 5, reaming guide shoe head; 51, slurry outlet; 52, spiral edge; 6, cementing plug; 7, casing; 8, centralizer; 81, rib. Detailed Description of the Invention

[0032] The principles and features of the present invention will be described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention. In the following paragraphs, the present invention will be described more specifically by way of example with reference to the accompanying drawings. The advantages and features of the present invention will be clearer according to the following description and the claims. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise scales, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0033] As Figure 1 and Figure 2 shown, this embodiment provides a turbine type reaming guide shoe assembly, including a sub 1, a turbine section 2, a rupture disc member 3, a support section 4 and a reaming guide shoe head 5. The sub 1, the turbine section 2, the rupture disc member 3 and the support section 4 are all straight cylindrical. The lower end of the sub 1 is used to connect and communicate with the end of the casing 7. The upper end of the turbine section 2 is connected and communicated with the lower end of the sub 1. The lower end of the turbine section 2 is connected and communicated with the upper end of the support section 4. The reaming guide shoe head 5 is coaxially installed at the lower end of the support section 4. The rupture disc member 3 is located in the sub 1 and installed on the turbine section 2. The turbine section 2 drives the reaming guide shoe head 5 to rotate under the action of the drilling fluid through the support section 4 to correct the wellbore. In this way, after the upper end of the sub is butted with the lower end of the casing, at this time, the drilling fluid is introduced through the casing. The turbine section drives the support section and the reaming guide shoe head to rotate coaxially under the action of the pressurized and flowing drilling fluid, so as to correct the wellbore by the reaming guide shoe head and guide the casing to be smoothly lowered into the well.

[0034] Among them, the structure of the reaming guide shoe head belongs to the prior art. One end away from the open end is provided with a plurality of slurry outlets 51, and a plurality of helically arranged spiral blades 52 are evenly arranged at intervals along the circumferential direction on its outer side wall. Both ends of the spiral blade are close to both ends of the reaming guide shoe head.

[0035] For details, see Figure 2In the above technical solution, the turbine section 2 includes a turbine section housing 21 and a turbine section shaft 22 which are both tubular and vertically arranged. The turbine section shaft 22 is coaxially and rotatably installed in the turbine section housing 21 through a support bearing 23, and there is a first annular space 25 between the turbine section shaft 22 and the turbine section housing 21. A turbine ring 24 fixed on the turbine section shaft 22 is coaxially arranged in the first annular space 25. The upper end of the turbine section housing 21 is coaxially connected to the corresponding end of the joint 1. The rupture disc member 3 is installed at the upper end of the turbine section shaft 22 to block the upper end of the turbine section shaft 22. The turbine ring 24 drives the turbine section shaft 22 to rotate under the drive of the drilling fluid, and the turbine section shaft 22 drives the support section 4 and the reaming shoe head 5 to rotate. In this way, the rupture disc member blocks the upper end of the turbine section shaft, and all the drilling fluid flows downward through the first annular space and drives the turbine section shaft to rotate by the turbine ring, and the turbine section shaft drives the support section and the reaming shoe head to rotate.

[0036] As Figure 7 shown, the turbine ring 24 includes an inner ring 241, an outer ring 242 and a plurality of blades 243. The inner ring 241 is coaxially arranged in the outer ring 242, and there is an annular gap between the inner ring 241 and the outer ring 242. The plurality of blades 243 can be divided into two groups of blade groups. Each group of blade groups has a plurality of blades 243. The two groups of blade groups are vertically spaced apart in the annular gap, and the plurality of blades 243 in the same group are circumferentially spaced apart in the annular gap. Both ends of each blade 243 are respectively connected to the inner ring 241 and the outer ring 242. The cross-section of the blade 243 is in the shape of ">". The opening sides of the plurality of blades 243 in the same group face the same direction in the circumferential direction, but the opening directions of the two groups of blade groups are exactly opposite. The turbine ring is similar to the turbine on the existing turbodrill and will not be elaborated here. Dozens or hundreds of turbine rings can be arranged in the first annular space. In this way, all the turbine rings synchronously drive the turbine section shaft to rotate to increase its torque.

[0037] In the above technical solution, a plurality of support bearings 23 and a plurality of turbine rings 24 are both provided. The plurality of support bearings 23 and the plurality of turbine rings 24 are vertically spaced apart in the first annular space 25. Its structure is simple, and it makes the turbine section shaft have good stability when rotating in the turbine section housing. At the same time, the plurality of turbine rings drive the turbine section shaft to rotate under the drive of the drilling fluid flow. Its driving force is large, and finally the rotation torque of the reaming shoe head is large. Preferably, three support bearings are provided, and a plurality of turbine rings are provided between adjacent two support bearings.

[0038] In the above technical solution, the lower end of the turbine joint shaft 22 is provided with liquid through holes 221 arranged at circumferential intervals. The liquid through holes 221 are used for the drilling fluid to flow into the turbine joint shaft 22 through the first annular space 25. In this way, the drilling fluid in the first annular space can enter the support joint through the liquid through holes and finally enter the slurry outlet on the reaming guide shoe head and be discharged into the well.

[0039] In the above technical solution, the lower end of the turbine joint shaft 22 is expanded in diameter so that its outer wall is close to the inner wall of the turbine joint housing 21, so as to contract the first annular space 25 into an annular gap, so that a small amount of drilling fluid will seep out through the annular gap.

[0040] As Figure 4 shown, in the above technical solution, the support joint 4 includes a support joint housing 41, a support joint shaft 42 and a lower end cover 43, all of which are tubular. The support joint shaft 42 is coaxially arranged in the support joint housing 41, and there is a second annular space 45 between the two. The support joint shaft 42 is rotatably connected to the support joint housing 41 through a bearing member 44 located in the second annular space 45. The lower end cover 43 is located at the inner lower end of the second annular space 45 and is coaxially and fixedly connected to the inner wall of the support joint housing 41 and is in sealed rotational contact with the support joint shaft 42. The lower end of the support joint shaft 42 is coaxially connected and communicated with the upper end of the reaming guide shoe head 5. The upper end of the support joint housing 41 is coaxially and fixedly connected to the lower end of the turbine joint housing 21. The upper end of the support joint shaft 42 is coaxially and fixedly connected to the lower end of the turbine joint shaft 22. In this way, the support joint shaft can rotate relative to the support joint housing, and the support joint shaft drives the reaming guide shoe head to rotate under the drive of the turbine joint shaft. At this time, the drilling fluid seeping out from the annular gap lubricates and cools the bearing member, thereby increasing the service life of the bearing member. The purpose of the lower end cover is to block the lower end of the second annular space to prevent the drilling fluid from leaking out through the lower end of the second annular space.

[0041] In the above technical solution, the bearing member 44 includes a centralizing bearing 441 and a thrust bearing 442. The centralizing bearing 441 and the thrust bearing 442 are both arranged in the second annular space 45, and the thrust bearing 442 is located between the centralizing bearing 441 and the lower end cover 43. Its structure is simple, and the rotational connection between the support joint shaft and the support joint housing is more stable.

[0042] As Figure 5As shown, in the above technical solution, the support section 4 further includes a tubular centralizer 8. The centralizer 8 is coaxially sleeved at the lower end of the support section housing 41, so that the stability of the lower end of the support section housing is better, and the support section can be corrected in the well, which is beneficial to the centralization of the reaming guide shoe head in the well. In this embodiment, a plurality of support ribs 81 are circumferentially and evenly protruded on the outer side wall of the centralizer. The length direction of the support ribs is consistent with the axial direction of the centralizer. The plurality of support ribs are used to lift the centralizer to the middle of the well (as much as possible to be coaxially distributed with the wellbore). The outer circular trajectories of the plurality of support ribs during rotation are equivalent to the outer circular trajectories of the plurality of spiral blades during rotation.

[0043] In the above technical solution, the lower end of the support section shaft 42 extends out of the support section housing 41, so that it is more convenient to connect the reaming guide shoe head to the lower end of the support section shaft and is not affected by the support section housing.

[0044] The above technical solution further includes a bowl-shaped cementing plug 6. The cementing plug 6 is used to be lowered into the joint 1 through the casing 7 after the wellbore is corrected. Its bowl mouth faces downward and seals the upper end of the first annular space 25. Thus, after the wellbore is corrected, the cementing plug 6 is directly lowered into the joint through the casing. In this way, the cementing plug seals the upper end of the first annular space, and then the cement slurry is lowered through the casing. The cement slurry presses and damages the rupture disc member 3 until it ruptures, thereby opening the upper end of the turbine section shaft. At this time, the cement slurry directly discharges through the slurry outlets on the turbine section shaft, the support section shaft, and the reaming guide shoe into the annular gap between the casing and the wellbore for cementing treatment.

[0045] As Figure 6As shown, the rupture disk member 3 includes a rupture disk housing 31, a rupture disk seat 32 and a rupture disk 33; the rupture disk housing is a cylindrical member, the upper end of which is trumpet-shaped, and the lower end is used to dock with the upper end of the turbine shaft. The lower end of the rupture disk housing 31 is provided with a sealing connection with a flange ring 311, the rupture disk seat 32 is a slot body, and an outer flange 321 is provided on the slot side of the rupture disk seat 32. The rupture disk seat 32 is arranged in the rupture disk housing 31 and is located above the flange ring 311, and its slot faces downward, the outer flange is aligned with the flange ring and bolted (connected by bolts and nuts, which belongs to the prior art), and the side wall of the rupture disk seat is provided with a plurality of embedding holes 322, each of which has a rupture disk 33 embedded in it. The disk 33 includes a cylinder seat 331 and a metal plugging piece 332. The plugging piece 332 is arranged in the cylinder seat 331 and isolates the cylinder seat 331. Since the rupture disk blocks the mounting hole, the entire rupture disk seals the upper end of the turbine shaft. After the cementing plug is lowered into the casing, the cementing plug (an existing standard part) seals the upper end of the first annular space. At this time, cement slurry can be injected into the casing. The cement slurry injection pressure is greater than the drilling fluid injection pressure. The cement slurry will first burst the cementing plug, and then squeeze the plugging piece to damage, thereby pushing the cylinder seat open. At this time, the cement slurry enters the turbine shaft, the support shaft and the eyelet guide shoe head in turn through the rupture disk, and finally overflows into the well through the slurry outlet, and cements the gap between the well and the casing.

[0046] Among them, in this embodiment, the connections between the casing and the joint, the joint and the turbine segment casing, the turbine segment casing and the support segment casing, the rupture disk housing and the turbine segment shaft, the turbine segment shaft and the support segment shaft, and the support segment shaft and the eyelet guide shoe are all connected by threads, and the connection method belongs to the prior art and will not be described in detail here.

[0047] The material of the rupture disk and the reaming shoe head provided in this embodiment can be made of drillable materials (such as 6351 aluminum alloy material), so that in the next drilling process, the rupture disk and the reaming shoe head can be drilled through by the PDC drill bit, and the turbine joint shaft and the support joint shaft described in this embodiment have large diameters, and their inner diameters can meet the passage of the drill bit used for the next drilling, and the maximum diameter of the drill bit used for the next drilling is smaller than the inner diameters of the turbine joint shaft and the support joint shaft, so that it can pass through the turbine joint shaft and the support joint shaft smoothly, so that after the cementing operation is completed, there is no need to remove the turbine reaming shoe assembly from the well, so that the PDC drill bit can directly proceed to the next drilling, saving time and cost.

[0048] It should be explained that in this embodiment, up and down are based on the well depth. For the horizontal section of a horizontal well, the turbine reamer assembly is placed horizontally in the horizontal section. Therefore, the position of the horizontal section closer to the wellhead is "up", and the position closer to the bottom of the well is "down".

[0049] As described above, it is only the preferred embodiment of the present invention, and there is no restriction on the present invention in any form; any ordinary technician in the industry can smoothly implement the present invention according to what is shown in the accompanying drawings of the specification and what is described above; however, any minor changes, modifications, and equivalent variations made by those skilled in the art within the scope of the technical solution of the present invention by using the technical content disclosed above are all equivalent embodiments of the present invention; at the same time, any equivalent changes, modifications, and variations made to the above embodiments based on the essential technology of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A turbine type eyelet guide shoe assembly, characterized in that: The invention comprises a joint (1), a turbine section (2), a rupture disk (3), a support section (4) and a reaming guide shoe (5); the joint (1), the turbine section (2), the rupture disk (3) and the support section (4) are all in the shape of a straight cylinder; the lower end of the joint (1) is used to connect and communicate with the end of a casing (7); the upper end of the turbine section (2) is connected and communicated with the lower end of the joint (1); the lower end of the turbine section (2) is connected and communicated with the upper end of the support section (4); the reaming guide shoe (5) is coaxially mounted on the lower end of the support section (4); the rupture disk (3) is located in the joint (1) and mounted on the turbine section (2); under the action of drilling fluid, the turbine section (2) drives the reaming guide shoe (5) to rotate through the support section (4) to correct the wellbore wall.

2. The turbine eyelet guide shoe assembly according to claim 1, characterized in that: The turbine section (2) comprises a turbine section casing (21) and a turbine section shaft (22) both of which are tubular and vertically arranged. The turbine section shaft (22) is coaxially rotatably mounted in the turbine section casing (21) via a support bearing (23). A first annular space (25) is provided between the turbine section shaft (22) and the turbine section casing (21). A turbine ring (24) fixed on the turbine section shaft (22) is coaxially arranged in the first annular space (25). The upper end of the turbine section casing (21) is coaxially connected to the corresponding end of the joint (1). The rupture disk (3) is mounted on the upper end of the turbine section shaft (22) to seal the upper end of the turbine section shaft (22). The turbine ring (24) drives the turbine section shaft (22) to rotate under the driving of the drilling fluid, and the turbine section shaft (22) drives the support section (4) and the reaming guide shoe (5) to rotate.

3. The turbine eyelet guide shoe assembly according to claim 2, characterized in that: The support bearing (23) and the turbine ring (24) are both provided in plurality, and the plurality of support bearings (23) and the plurality of turbine rings (24) are distributed in the first annular space (25) at intervals in the upper and lower parts.

4. The turbine eyelet guide shoe assembly according to claim 2, characterized in that: The lower end of the turbine section shaft (22) has liquid holes (221) arranged at intervals in the annular direction, and the liquid holes (221) are used to allow the drilling fluid to flow into the turbine section shaft (22) through the first annular space (25).

5. The turbine eyelet guide shoe assembly according to claim 4, characterized in that: The lower end of the turbine segment shaft (22) is expanded in diameter until its outer wall is close to the inner wall of the turbine segment casing (21), so as to shrink the first annular space (25) into an annular gap.

6. The turbine type eyelet guide shoe assembly according to any one of claims 4-5, characterized in that: The support section (4) comprises a tubular support section casing (41), a support section shaft (42) and a lower end cover (43). The support section shaft (42) is coaxially arranged in the support section casing (41), and a second annular space (45) is provided between the two. The support section shaft (42) is rotatably connected to the support section casing (41) via a bearing member (44) located in the second annular space (45). The lower end cover (43) is located at the inner lower end of the second annular space (45), and is coaxially fixedly connected to the inner wall of the support section casing (41), and is in sealed rotatable contact with the support section shaft (42). The lower end of the support section shaft (42) is coaxially connected to and communicated with the upper end of the eyelet guide shoe (5). The upper end of the support section casing (41) is coaxially fixedly connected to the lower end of the turbine section casing (21), and the upper end of the support section shaft (42) is coaxially fixedly connected to the lower end of the turbine section shaft (22).

7. The turbine eyelet guide shoe assembly according to claim 6, characterized in that: The bearing member (44) comprises a centering bearing (441) and a thrust bearing (442), wherein the centering bearing (441) and the thrust bearing (442) are both arranged in the second annular space (45), and the thrust bearing (442) is located between the centering bearing (441) and the lower end cover (43).

8. The turbine eyelet guide shoe assembly according to claim 6, characterized in that: The support segment (4) further comprises a tubular centralizer (8), wherein the centralizer (8) is coaxially sleeved on the lower end of the support segment casing (41).

9. The turbine eyelet guide shoe assembly according to claim 6, characterized in that: The lower end of the support joint shaft (42) extends out of the support joint housing (41).

10. The turbine eyelet guide shoe assembly according to claim 6, characterized in that: It also includes a bowl-shaped cementing plug (6), which is used to be lowered into the joint (1) through the casing (7) after the well wall is corrected, with its bowl facing downward, and to seal the upper end of the first annular space (25).

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