Turbine power guiding shoe

Abstract

The invention relates to a turbine power guiding shoe which comprises an upper connector, a flow guiding piece, a turbine shell, a turbine shaft, a flow blocking ring, a lower shell, a lower end cover and a lower short shaft. The upper joint is connected with a casing coupling; the left end of the flow guide piece is connected with the upper connector through threads, and the right end of the flow guide piece is connected with the left end of the turbine shell through threads. A turbine stator is arranged in the turbine shell, and the right end of the turbine shell is in threaded connection with the lower shell; the left end of the turbine shaft extends into the flow guide part and is provided with a first bearing set for supporting, the turbine shaft is connected with a turbine rotor through a key, a flow blocking ring is installed at the right end of the turbine shaft, and a second bearing set is installed at the right end of the flow blocking ring. The turbine rotor can drive the turbine shaft to rotate, the turbine shaft can drive the lower short shaft to rotate, finally the guiding shoe is driven to rotate, at the moment, the guiding shoe rotating at a high speed can effectively clean obstacles on the well wall, and a casing pipe can be smoothly put down.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of oilfield well completion tools, in particular to a turbine power guiding shoe. BACKGROUND

[0002] The traditional guiding shoe used in the casing operation has relatively single function, and cannot actively clean or correct the well wall when encountering hard rock, fault steps or sand bridges and the like in the complex downhole environment, and cannot effectively assist the casing to be lowered, which easily leads to the casing being blocked.

[0003] In view of the above problems, the turbine power guiding shoe is developed, which can generate additional power through the drilling fluid driving turbine, and can rotate at high speed and scrape and break the stone under the driving of the turbine power, so as to effectively clean the well wall obstacles and reduce the risk of casing damage, and also improve the speed of casing lowering. SUMMARY

[0004] The present application aims to provide a turbine power guiding shoe to solve the problem that the traditional guiding shoe cannot actively clean or correct the well wall when encountering hard rock, fault steps or sand bridges and the like in the complex downhole environment, and cannot effectively assist the casing to be lowered, which leads to the casing being blocked.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: A turbine power guiding shoe, comprising an upper joint, a flow guide, a turbine shell, a turbine shaft, a flow blocking ring, a lower shell, a lower end cover and a lower stub shaft, wherein the upper joint is connected with a casing collar; the left end of the flow guide is connected with the upper joint through threads, and the right end of the flow guide is connected with the left end of the turbine shell through threads; a turbine stator is arranged in the turbine shell, and the right end of the turbine shell is connected with the lower shell through threads; the left end of the turbine shaft extends into the flow guide and is supported by bearing set one, a turbine rotor is connected with the turbine shaft through a key, the right end of the turbine shaft is installed with the flow blocking ring, the right end of the flow blocking ring is installed with bearing set two, and the end of the turbine shaft is connected with the lower stub shaft through threads; a centralizer is arranged on the lower shell, and the right end of the lower shell is connected with the lower end cover through threads; and the right end of the lower stub shaft is connected with the guiding shoe through threads.

[0006] As a further scheme of the present application, the turbine stator is tightly attached to the inner wall of the turbine shell, and adjustment sleeve one and adjustment sleeve two are respectively arranged between the flow guide and the turbine stator and between the lower shell and the turbine stator to press the turbine stator.

[0007] As a further scheme of the present application, the bearing set one is limited by the left end shoulder of the turbine shaft.

[0008] As a further scheme of the present application: the turbine rotor is connected with the turbine shaft through a key, the left end is limited in axial movement by a press ring screwed on the right end of the turbine shaft, and the right end is limited in axial movement by a shaft shoulder.

[0009] As a further scheme of the present application: the left end of the flow barrier ring is close to the shaft shoulder of the right end of the turbine shaft, and the flow barrier ring is limited by bearing set two.

[0010] As a further scheme of the present application: the left end of the flow barrier ring is close to the shaft shoulder of the right end of the turbine shaft, and the flow barrier ring is limited by bearing set two.

[0011] Compared with the prior art, the present application has the following beneficial effects: 1. The turbine set is arranged, when liquid flows through the turbine power guide shoe, the liquid drives the turbine rotor to rotate, the turbine rotor drives the turbine shaft to rotate, the turbine shaft drives the lower short shaft to rotate, and finally drives the guide shoe to rotate, at this time, the high-speed rotating guide shoe can effectively clean the well wall obstacles, so that the casing is smoothly lowered.

[0012] 2. The turbine power guide shoe has high rotating speed, and the casing lowering efficiency is improved.

[0013] 3. The turbine power guide shoe is made of drillable material, and the tool can be quickly drilled. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is a structural schematic view of a turbine power guide shoe.

[0015] Fig. 2 It is a side view of a flow guide in a turbine power guide shoe.

[0016] Fig. 3 It is a front view of a flow guide in a turbine power guide shoe.

[0017] Fig. 4 It is a structural schematic view of a turbine stator in a turbine power guide shoe.

[0018] Fig. 5 It is a structural schematic view of a turbine rotor in a turbine power guide shoe.

[0019] In the figure: 1. upper joint, 2. flow guide, 3. bearing set one, 4. adjustment sleeve one, 5. press ring, 6. turbine stator, 7. turbine rotor, 8. key, 9. adjustment sleeve two, 10. turbine housing, 11. lower housing, 12. flow barrier ring, 13. bearing set two, 14. turbine shaft, 15. centralizer, 16. positioning sleeve one, 17. positioning sleeve two, 18. lower end cover, 19. lower short shaft. DETAILED DESCRIPTION

[0020] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present application.

[0021] Please refer to Figs. 1-5 In the embodiments of the present application, a turbine power guide shoe comprises an upper joint 1, a flow guide 2, a turbine shell 10, a turbine shaft 14, a flow blocking ring 12, a lower shell 11, a lower end cover 18 and a lower stub shaft 19. The upper joint 1 is connected with a casing joint. The left end of the flow guide 2 is connected with the upper joint 1 through threads, and the right end of the flow guide 2 is connected with the left end of the turbine shell 10 through threads. The turbine shell 10 is provided with a turbine stator 6 inside, and the right end of the turbine shell 10 is connected with the lower shell 11 through threads. The left end of the turbine shaft 14 extends into the flow guide 2 and is supported by bearing set one 3. The turbine rotor 7 is connected with the turbine shaft 14 through keys 8. The flow blocking ring 12 is installed at the right end of the turbine shaft 14, and bearing set two 13 is installed at the right end of the flow blocking ring 12. The turbine shaft 14 is connected with the lower stub shaft 19 through threads at the end. The lower shell 11 is provided with a centralizer 15, and the right end of the lower shell 11 is connected with the lower end cover 18 through threads. The right end of the lower stub shaft 19 is connected with the guide shoe through threads. The guide shoe is connected with the casing through the casing joint.

[0022] The turbine stator 6 is tightly attached to the inner wall of the turbine shell 10. Adjustment sleeve one 4 and adjustment sleeve two 9 are respectively installed between the flow guide 2 and the turbine stator 6 and between the lower shell and the turbine stator 6 to press the turbine stator 6.

[0023] The bearing set one 3 is limited by the left end shaft shoulder of the turbine shaft.

[0024] The turbine rotor 7 is connected with the turbine shaft 14 through keys 8, and the pressure ring 5 is connected with the turbine shaft 14 through threads. The left end of the pressure ring 5 is screwed on the left end of the turbine shaft 14 to limit the axial movement, and the right end is limited by the shaft shoulder.

[0025] The left end of the flow blocking ring 12 is tightly attached to the right end shaft shoulder of the turbine shaft 14, and the flow blocking ring 12 is limited by the bearing set two 13.

[0026] The left end of the bearing set two 13 is tightly attached to the flow blocking ring 12. Positioning sleeve one 16 and positioning sleeve two 17 are respectively installed between the lower end cover 18 and the lower stub shaft 19 and the bearing set two 13 to limit the bearing set two 13.

[0027] The working principle of the present application is as follows: When working, the upper joint 1 is connected with the casing tail through the casing collar; the drilling fluid enters from the upper joint 1, then continues to flow into the vortex turbine stator 6 and the vortex turbine rotor 7 through the flow hole on the flow guide 2, and forms an impact, at this time, the liquid can be converted into mechanical energy; the vortex turbine rotor 7 is connected with the vortex turbine shaft 14 through the key 8, so that the vortex turbine rotor 7 drives the vortex turbine shaft 14 to rotate; since the vortex turbine shaft 14 is screwed with the lower short shaft 19, the lower short shaft 19 is driven to rotate; the lower short shaft 19 can be directly connected with the guide shoe, so that the guide shoe is driven to rotate at high speed and scrape the well wall, so as to clean the obstacles on the well wall.

[0028] The drilling fluid flows through the channel: firstly flows into from the upper joint 1, then flows through the flow channel of the vortex turbine stator 6 and the vortex turbine rotor 7 through the flow hole on the flow guide 2, then flows into the end of the vortex turbine shaft 14 through the flow hole on the vortex turbine shaft 14 due to the blocking effect of the flow blocking ring 12, and finally flows through the inner cavity of the lower short shaft 19, and is sprayed out through the water hole on the guide shoe.

[0029] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A turbine-powered shoe, characterized in that, It includes an upper connector (1), a guide component (2), a turbine housing (10), a turbine shaft (14), a baffle ring (12), a lower housing (11), a lower end cover (18), and a lower short shaft (19); the upper connector (1) is connected to the sleeve coupling; the left end of the guide component (2) is threaded to the upper connector (1), and the right end of the guide component (2) is threaded to the left end of the turbine housing (10); a turbine stator (6) is provided inside the turbine housing (10), and the right end of the turbine housing (10) is threaded to the lower housing (11); the turbine... The left end of the shaft (14) extends into the guide (2) and is supported by bearing assembly one (3). The turbine shaft (14) is connected to the turbine rotor (7) by a key (8). The right end of the turbine shaft (14) is equipped with a baffle ring (12). The right end of the baffle ring (12) is equipped with bearing assembly two (13). The end of the turbine shaft (14) is connected to the lower short shaft (19) by a thread. The lower housing (11) is equipped with a stabilizer (15). The right end of the lower housing (11) is connected to the lower end cover (18) by a thread. The right end of the lower short shaft (19) is connected to the guide shoe by a thread.

2. The turbine-powered shoe according to claim 1, characterized in that, The turbine stator (6) is closely attached to the inner wall of the turbine housing (10). Adjusting sleeve one (4) and adjusting sleeve two (9) are installed between the guide member (2) and the turbine stator (6) and between the lower housing and the turbine stator (6) respectively to press the turbine stator (6).

3. The turbine-powered shoe according to claim 1, characterized in that, The bearing assembly (3) is limited by the shoulder at the left end of the turbine shaft.

4. A turbine-powered shoe according to claim 1, characterized in that, The turbine rotor (7) is connected to the turbine shaft (14) by a key (8), and the pressure ring (5) is connected to the turbine shaft (14) by a thread.

5. A turbine-powered shoe according to claim 1, characterized in that, The left end of the baffle ring (12) is close to the right shoulder of the turbine shaft (14), and the baffle ring (12) is limited by the bearing assembly two (13).

6. A turbine-powered shoe according to claim 1, characterized in that, The left end of the bearing assembly 2 (13) is close to the baffle ring (12). Positioning sleeve 1 (16) and positioning sleeve 2 (17) are respectively installed between the lower end cover (18) and the lower short shaft (19) and the bearing assembly 2 (13) to limit the bearing assembly 2 (13).

7. A turbine-powered shoe according to claim 1, characterized in that, The flow guide (2) is provided with flow holes.

8. A turbine-powered shoe according to claim 1, characterized in that, The turbine shaft (14) is provided with an overflow hole.

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