A casing segmented pushing and running tool

Abstract

The invention relates to a segmented pushing and running tool for casing, comprising a segmented telescopic short section, a pressure conversion device, a turbine motor and a rotating guide shoe. The pressure conversion device, the turbine motor and the rotating guide shoe are connected to the end of a casing string in sequence. The segmented telescopic short section is connected at a certain position away from the end of the casing string according to the predicted distribution of borehole friction resistance, and the casing string is divided into an upper gravity lowering section and a lower thrust lowering section. The segmented telescopic short section and the pressure conversion device together form a hydraulic cylinder piston structure. On the basis of gravity lowering of the casing, a cycle is established, and the turbine motor cleans the well wall through the rotating guide shoe to reduce the friction resistance of the casing lowering. At the same time, the hydraulic pressure of the pressure conversion device is converted, and the segmented pushing and running of the casing string is realized by utilizing the hydraulic cylinder piston structure.

Description

Technical Field

[0001] The invention relates to the field of casing tools for oil and gas well completion, and in particular to a casing segmented pushing and running tool. Background Art

[0002] With the development of oil and gas resources and the advancement of drilling technology, there are more and more extended-reach wells and long-horizontal-section horizontal wells. Due to the complex geological conditions and the level of directional construction, the actual drilling wellbore trajectory may have problems such as doglegs and expanded wellbore diameters. At the same time, due to the high mud density and long horizontal sections, the friction resistance of casing running is greatly increased, making it very difficult to run the casing to the designed well depth. For such high-friction wellbores, how to smoothly run the casing to the predetermined position, domestic and foreign research has proposed a variety of solutions, such as: top drive rotation, lifting and lowering the casing string; circulating drilling fluid, removing cuttings bed; removing micro-steps, sand bridges, shrinkage, and block drop on the well wall to reduce friction, and floating the pipe string, etc. These technical measures can partially solve the problem of encountering resistance when running the casing, but they all have their own shortcomings and limitations of applicability, and cannot solve the technical difficulties of smoothly running the casing in high-friction wells such as large vertical ratio wells and extended-reach wells. Summary of the invention

[0003] In order to solve the problem of smoothly running casing into high-friction wellbore, the present invention provides a segmented casing pushing and running tool to address the deficiencies in the prior art. The tool can reduce the friction resistance of casing running by segmenting the casing string structure and circulating drilling fluid to remove micro-steps, cuttings beds, sand bridges, reduced diameters, and dropped blocks on the well wall. On the basis of lowering the casing by gravity, the tool can push and run the casing in segments through a hydraulic cylinder piston structure to further improve the casing running capacity.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A casing segmented pushing and running tool comprises a segmented telescopic short section 2, a pressure conversion device 3, a turbine motor 4, and a rotating guide shoe 5, wherein:

[0006] The segmented telescopic short section 2 comprises an upper variable buckle joint 201, an outer spline cylinder 202, an inner spline cylinder 204, and a lower variable buckle joint 205; wherein, the upper end of the upper variable buckle joint 201 is connected to the casing 1, and the lower end of the upper variable buckle joint 201 is connected to the upper end of the outer spline cylinder 202; the inner wall of the middle section of the outer spline cylinder 202 is provided with an inner spline pair, and the inner wall of the lower end of the outer spline cylinder 202 is provided with a hanging step; the outer wall of the upper end of the inner spline cylinder 204 is provided with a hanging step, and the outer wall of the middle section of the inner spline cylinder 204 is provided with an outer spline pair; the outer spline cylinder 202 and the inner spline cylinder 204 form an axial sealing telescopic fit through the inner and outer spline pairs, and the outer spline cylinder 202 and the inner spline cylinder 204 form an axial hanging fit through the hanging steps provided on the inner and outer walls; the lower end of the lower variable buckle joint 205 is connected to the inner spline cylinder 204, and is axially connected to the pressure conversion device 3 through the casing 1;

[0007] The pressure conversion device 3 includes a throttling rotor 301, a throttling stator 302, a transformer housing 304, a transmission core shaft 305 and a transmission shaft 306; wherein the transformer housing 304 is a hollow cylinder, the upper end of which is connected to the segmented telescopic short section 2 through a sleeve 1, and the lower end of the transformer housing 304 is connected to the turbine motor 4; the throttling stator 302 is a short cylinder, with an axial hole in the middle, and a circulating liquid flow hole next to the axial hole, and the throttling stator 302 is sealed and fixed in the middle section of the transformer housing 304; the upper end of the throttling rotor 301 is a disc-shaped body, and the lower end is a torsion transmission shaft, and the disc-shaped bodies are arranged radially symmetrically There are large holes and small holes. The disc-shaped body of the throttling rotor 301 is located on the upper end surface of the throttling stator 302. The torsion transmission shaft of the throttling rotor 301 is inserted into the axial hole of the throttling stator 302. The throttling rotor 301 and the throttling stator 302 form a rotating seal fit. At the same time, the large hole and the small hole of the throttling rotor 301 and the flow hole of the throttling stator 302 form a rotating interval fit. The upper end of the transmission core shaft 305 is connected to the protruding end of the torsion transmission shaft of the throttling rotor 301, and the outer wall of the lower end is provided with an external spline pair. The inner wall of the upper section of the transmission shaft 306 is provided with an internal spline pair that matches the external spline pair at the lower end of the throttling rotor 301.

[0008] The turbine motor 4 includes a turbine housing 405 and a turbine stator 402 fixed in the turbine housing 405, a turbine rotor 403 matched with the turbine stator 402, and a motor output shaft 401 fixedly connected to the turbine rotor 403; the upper end of the turbine housing 405 is connected to the pressure conversion chamber housing 304 of the pressure conversion device 3, the upper end of the motor output shaft 401 is connected to the lower end of the transmission shaft 306 of the pressure conversion device 3, the lower end of the motor output shaft 401 is connected to the rotating guide shoe 5, and a bypass hole connecting the upper turbine stator 402 and the gap between the turbine stator 402 and the flow channel of the rotating guide shoe 5 is provided on the motor output shaft 401.

[0009] The above scheme further comprises:

[0010] The lower part of the motor output shaft 401 is axially limited in a box-like structure composed of a bearing cover 408 and a bearing sleeve 406 by a plane bearing 407. The box-like structure is fixedly connected to the turbine housing 405 by pressure friction.

[0011] A plurality of turbine rotors 403 are axially arranged on the motor output shaft 401 of the turbine motor 4 , and a plurality of turbine stators 402 matched therewith are fixed on the turbine housing 405 .

[0012] The inner wall at the lower end of the turbine housing 405 is connected to a stabilizing sleeve 409 , and the upper outer wall of the rotating guide shoe 5 is rotatably matched with the stabilizing sleeve 409 .

[0013] The guide shoe cutting section of the rotating guide shoe 5 adopts a micro-helical structure and is arranged with PDC cutting teeth. The gauge protection section adopts a 45° helical structure, and the nozzle direction at the lower end is perpendicular to the axis.

[0014] A step is provided in the middle of the transformer chamber housing 304 , and the throttling stator 302 is installed on the step. A through-wall threaded hole is arranged on the side wall of the transformer chamber housing 304 , and the throttling stator 302 is fixed by a limiting threaded pin 303 .

[0015] A sealing assembly 203 is provided at the joint between the outer spline cylinder 202 and the inner spline cylinder 204 .

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. During the casing running process, by establishing a circulation and using the guide shoe to rotate and remove micro-steps, cuttings beds, sand bridges, reduced diameters, and dropped blocks on the well wall, the friction resistance of the casing running is reduced and the casing running capacity is improved;

[0018] 2. By establishing a hydraulic cylinder piston structure, the casing string can be pushed down in sections. On the basis of gravity casing, the casing running capacity can be further improved by using hydraulic pressure;

[0019] 3. It can stimulate the vibration of cement slurry during cementing process and improve the cementing quality;

[0020] 4. The turbine motor, pressure conversion device and guide shoe can be drilled out, and after being drilled out, they can provide a channel for subsequent drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the overall structure diagram of the casing segmented pushing and running tool;

[0022] Figure 2 yes Figure 1 Sectional view at A-A in the middle;

[0023] Figure 3 yes Figure 1 Cross-sectional view at B-B in the middle.

[0024] In the figure: casing 1, telescopic short section 2, upper variable buckle joint 201, outer spline cylinder 202, sealing assembly 203, inner spline cylinder 204, lower variable buckle joint 205, pressure conversion device 3, throttling rotor 301, throttling stator 302, limiting threaded pin 303, pressure conversion chamber housing 304, transmission core shaft 305, transmission shaft 306, turbine motor 4, motor output shaft 401, turbine stator 402, turbine rotor 403, flow bearing 404, turbine housing 405, bearing cylinder 406, plane bearing 407, bearing cover 408, straightening sleeve 409, rotating guide shoe 5. DETAILED DESCRIPTION

[0025] Embodiment 1, as Figure 1 As shown, the casing segmented pushing and running tool mentioned in this embodiment is composed of four parts: a segmented telescopic short section 2, a pressure conversion device 3, a turbine motor 4, and a guide shoe 5.

[0026] Reference Figure 2 The segmented telescopic short section 2 includes an upper variable buckle joint 201, an outer spline barrel 202, an inner spline barrel 204, and a lower variable buckle joint 205. The upper end of the upper variable buckle joint 201 is connected to the casing 1 through an internal thread, and the lower end of the upper variable buckle joint 201 is connected to the upper end of the outer spline barrel 202 through an external thread; the inner wall of the middle section of the outer spline barrel 202 is provided with an inner spline pair, and the inner wall of the lower end of the outer spline barrel 202 is provided with a hanging step; the outer wall of the upper end of the inner spline barrel 204 is provided with a hanging step, and the outer wall of the middle section of the inner spline barrel 204 is provided with an outer spline pair; the outer spline barrel 202 and the inner spline barrel 204 form an axial sealing telescopic fit through the inner and outer spline pairs, and the outer spline barrel 202 and the inner spline barrel 204 form an axial hanging fit through the hanging steps provided on the inner and outer walls; the lower end of the lower variable buckle joint 205 is connected to the inner spline barrel 204, and is axially connected to the pressure conversion device 3 through the casing 1.

[0027] Refer to the attached Figure 3 The pressure conversion device 3 includes a throttling rotor 301, a throttling stator 302, a transformer housing 304, a transmission core shaft 305 and a transmission shaft 306. The transformer housing 304 is a hollow cylinder, the upper end of which is connected to the segmented telescopic short section 2 through an internal thread connection sleeve 1, and the lower end of the transformer housing 304 is connected to the turbine motor 4 through an external thread; the throttling stator 302 is a short column with an axial hole in the middle and a circulating fluid flow hole next to the axial hole. The throttling stator 302 is sealed and fixed in the middle section of the transformer housing 304; the throttling rotor 301 has a disc-shaped body at the upper end and a torsion transmission shaft at the lower end. The disc-shaped body has large holes and small holes arranged radially symmetrically. The disc-shaped body of the throttling rotor 301 is located on the upper end face of the throttling stator 302, and the torsion transmission shaft of the throttling rotor 301 is inserted into the shaft of the throttling stator 302. In the hole, the throttling rotor 301 and the throttling stator 302 form a rotating seal, and at the same time, the large hole and the small hole of the throttling rotor 301 and the flow hole of the throttling stator 302 form a rotating interval fit; the upper end of the transmission core shaft 305 is connected to the protruding end of the torsion transmission shaft of the throttling rotor 301 through a reverse thread, and the outer wall of the lower end is provided with an external spline pair; the inner wall of the upper section of the transmission shaft 306 is provided with an internal spline pair that cooperates with the external spline pair at the lower end of the throttling rotor 301, and the inner side of the lower end of the transmission shaft 306 is a reverse thread, which is threadedly connected to the turbine motor output shaft 401, and the external spline pair at the lower end of the transmission core shaft 305 is axially slidably connected with the internal spline pair of the transmission shaft 306.

[0028] The turbine motor 4 includes a turbine housing 405 and a turbine stator 402 fixed in the turbine housing 405, a turbine rotor 403 matched with the turbine stator 402, and a motor output shaft 401 fixedly connected to the turbine rotor 403. The upper end of the turbine housing 405 is threadedly connected to the pressure conversion chamber housing 304 of the pressure conversion device 3, the upper end of the motor output shaft 401 is threadedly connected to the lower end of the transmission shaft 306 of the pressure conversion device 3, the lower end of the motor output shaft 401 is threadedly connected to the rotating guide shoe 5, and a bypass hole is provided on the motor output shaft 401 to connect the gap between the upper turbine stator 402 and the turbine stator 402 and the flow channel of the rotating guide shoe 5.

[0029] The above embodiment further includes:

[0030] The lower part of the motor output shaft 401 is axially limited in a box-like structure composed of a bearing cover 408 and a bearing sleeve 406 by a plane bearing 407. The box-like structure is fixedly connected to the turbine housing 405 by pressure friction.

[0031] A plurality of turbine rotors 403 are axially arranged on the motor output shaft 401 of the turbine motor 4 , and a plurality of turbine stators 402 matched therewith are fixed on the turbine housing 405 .

[0032] The inner wall at the lower end of the turbine housing 405 is connected to a stabilizing sleeve 409 , and the upper outer wall of the rotating guide shoe 5 is rotatably matched with the stabilizing sleeve 409 .

[0033] The guide shoe cutting section of the rotating guide shoe 5 adopts a micro-helical structure and is arranged with PDC cutting teeth. The gauge protection section adopts a 45° helical structure, and the nozzle direction at the lower end is perpendicular to the axis.

[0034] A step is provided in the middle of the transformer chamber housing 304 , and the throttling stator 302 is installed on the step. A through-wall threaded hole is arranged on the side wall of the transformer chamber housing 304 , and the throttling stator 302 is fixed by a limiting threaded pin 303 .

[0035] A sealing assembly 203 is provided at the joint between the outer spline cylinder 202 and the inner spline cylinder 204 .

[0036] Typical embodiments, combined with the attached Figure 1-3A segmented casing pushing tool, which consists of a segmented telescopic short section 2, a pressure conversion device 3, a turbine motor 4, and a guide shoe 5. The segmented telescopic short section is connected at a certain position from the end of the casing string according to the predicted distribution of borehole friction resistance. The casing string is divided into an upper gravity entry section and a lower thrust entry section, and together with the pressure conversion device, it forms a hydraulic cylinder piston structure. The outer tube of the telescopic short section and the casing on its upper part are equivalent to the cylinder of the hydraulic piston structure, and the inner tube of the telescopic short section and the casing connected to its lower part and the pressure conversion device are equivalent to the piston. The end of the casing string is connected to the pressure conversion device, the turbine motor and the rotary guide shoe in sequence. On the basis of the entire casing string being lowered to the limit by gravity, a cycle is established, and the turbine motor drives the rotary guide shoe to remove micro-steps, cuttings beds, sand bridges, reduced diameters, and dropped blocks from the well wall. The frictional resistance of casing lowering is reduced, and at the same time, high- and low-pressure liquid is generated in the hydraulic cylinder piston structure through the pressure conversion device. When high-pressure liquid is generated, the lower thrust lowering section casing is lowered under the action of hydraulic thrust, and the upper gravity lowering section casing is relatively stopped under the combined action of the hydraulic reaction force and resistance of the hydraulic piston, and the segmented telescopic short section is extended. When low-pressure liquid is generated, the lower thrust lowering section casing is stopped due to frictional resistance, and the upper gravity lowering section casing is lowered under the action of gravity, and the segmented telescopic short section is retracted. With the high and low pressure of the liquid in the hydraulic cylinder piston structure, the casing is continuously pushed and lowered until the entire casing string is successfully lowered to the predetermined depth.

[0037] Among them, the telescopic short section 2 includes an upper variable buckle joint 201, an outer spline cylinder 202, a sealing assembly 203, an inner spline cylinder 204, and a lower variable buckle joint 205; the pressure conversion device 3 includes a throttling rotor 301, a throttling stator 302, a limiting threaded pin 303, a pressure conversion chamber housing 304, a transmission core shaft 305, and a transmission shaft 306; the turbine motor 4 includes a motor output shaft 401, a turbine stator 402, a turbine rotor 403, a flow bearing 404, a turbine housing 405, a bearing cylinder 406, a plane bearing 407, a bearing cover 408, and a straightening sleeve 409.

[0038] The casing telescopic pup joint 2 divides the casing string into an upper gravity lowering section and a lower thrust lowering section, and together with the pressure conversion device 3 forms a hydraulic cylinder piston structure. When the entire casing string is lowered to the limit by gravity, a circulation is established, and the pressure conversion device 3 cleans the well wall by rotating the guide shoe 5 to reduce the friction resistance of the casing, and at the same time, the casing is pushed down in sections through the hydraulic cylinder piston structure.

[0039] The inner side of the upper end of the outer spline cylinder 202 of the segmented telescopic short section 2 is a threaded connecting buckle, the middle inner side is an internal spline pair, and the inner side of the lower end is a suspension step. The outer side of the upper end of the inner spline cylinder 204 is a suspension step, the middle outer side is an external spline pair, and the outer side of the lower end is a connecting threaded buckle. The outer spline cylinder 202 and the inner spline cylinder 204 are connected by sliding splines, which can realize functions such as telescopic, suspension and torque transmission.

[0040] The inner side of the upper end of the transmission shaft 306 of the pressure conversion device 3 is an internal spline pair, and the inner side of the lower end is a reverse thread connection, which is threadedly connected to the turbine motor output shaft 401. The inner side of the upper end of the transmission core shaft 305 is a reverse thread connection, and the outer side of the lower end is an external spline pair, which is slidably connected to the inner spline of the transmission shaft 306. The upper end of the throttling rotor 301 is a disc-shaped body, and the lower end is a torsion transmission shaft. The disc-shaped body has large holes and small holes arranged radially symmetrically, and the torsion transmission shaft is threadedly connected to the transmission core shaft 305. The throttling stator 302 is a short cylinder, with an axial hole in the middle, and a circulating fluid flow hole next to the axial hole. The axial hole is matched with the torsion transmission shaft of the throttling rotor 301, and the upper end surface of the throttling stator 302 is in contact with the lower end surface of the throttling rotor 301. The inner side of the upper end of the transformer housing 304 is a sleeve thread, and there is a step in the middle for installing the throttling stator 302. A through-wall threaded hole is arranged on the side wall of the step for installing the limiting threaded pin 303 to fix the throttling stator 302. During the rotation of the throttling rotor 301 relative to the throttling stator 302, the small hole and the large hole on the throttling rotor 301 are alternately coaxial with the circulating fluid flow hole on the throttling stator 302, and the flow area of ​​the circulating fluid in the pipe string changes between the minimum and the maximum, causing the circulating fluid pressure in the transformer housing 304 to change between high and low pressure relative to the annulus.

[0041] The motor output shaft 401 of the turbine motor 4 has multiple groups of turbine sections including turbine rotors 403 and turbine stators 402 axially arranged. The turbine rotor 403 is fixed on the motor output shaft 401 and can rotate with the motor output shaft 401. The turbine stator 402 is fixed on the turbine casing 405. The lower part of the motor output shaft 401 is axially limited by a plane bearing 407 in a box-like structure composed of a bearing cover 408 and a bearing cylinder 406. This box-like structure is fixedly connected to the turbine casing 405 through pressure friction. When the drilling fluid flows through the inner cavity of the tool turbine section, the hydraulic drive motor output shaft 401 rotates.

[0042] The upper end of the rotating guide shoe 5 is connected to the turbine motor output shaft 401 through a thread. The guide shoe cutting section adopts a micro-helical structure and is arranged with PDC cutting teeth, which is conducive to drilling in obstructed and reduced diameter well sections. The diameter-protecting section adopts a 45° helical structure, which is conducive to the straightening of the tool and the circulation of cuttings. The nozzle direction at the lower end of the rotating guide shoe 5 is perpendicular to the axis, which is conducive to rotating and cleaning the well wall.

[0043] The present invention mentions a casing segmented pushing and lowering tool, and its use process is as follows: in the casing string structure, the pressure conversion device 3, the turbine motor 4 and the rotary guide shoe 5 are connected to the end of the casing string in sequence, and the segmented telescopic short section 2 is connected at a certain position away from the end of the casing string according to the predicted distribution of wellbore friction resistance. The casing string is divided into an upper gravity lowering section and a lower thrust lowering section, and together with the pressure conversion device 3, it forms a hydraulic cylinder piston structure. When the entire casing string is lowered to the limit by gravity, by establishing a circulation, the turbine variable motor 4 drives the rotary guide shoe 5 connected to the lower end to remove micro-steps, cuttings beds, sand bridges, reduced diameters, and falling blocks from the well wall to reduce the friction resistance of the casing lowering. At the same time, the turbine variable motor 4 drives the pressure conversion device connected to the upper end to generate high and low conversion pressures, and together with the hydraulic cylinder piston structure formed by the casing string, the casing is pushed and lowered. The specific process is: when high-pressure liquid is generated in the pressure conversion device, the lower thrust lowering section casing overcomes the resistance and is further lowered under the thrust of the hydraulic cylinder piston, and the upper gravity lowering section casing stops relatively under the combined force of the piston hydraulic reaction force and the resistance, and the spline cylinder 204 in the segmented telescopic short section 2 extends; when low-pressure liquid is generated in the pressure conversion device, the lower thrust lowering section casing stops due to friction resistance, and the upper gravity lowering section casing is lowered under the action of gravity, and the segmented telescopic short section 2 retracts; as the liquid pressure in the pressure conversion device changes from high to low, the casing is pushed down continuously until the entire casing string is successfully lowered to the predetermined depth.

Claims

1. A casing segmented pushing and running tool, comprising a segmented telescopic short section (2), a pressure conversion device (3), a turbine motor (4), and a rotating guide shoe (5). Its characteristics are: The segmented telescopic short section (2) comprises an upper variable buckle joint (201), an outer spline cylinder (202), an inner spline cylinder (204), and a lower variable buckle joint (205); wherein the upper end of the upper variable buckle joint (201) is connected to the sleeve (1), and the lower end of the upper variable buckle joint (201) is connected to the upper end of the outer spline cylinder (202); an inner spline pair is provided on the inner wall of the middle section of the outer spline cylinder (202), and a hanging step is provided on the inner wall of the lower end of the outer spline cylinder (202); a hanging step is provided on the outer wall of the upper end of the inner spline cylinder (204), and an outer spline pair is provided on the outer wall of the middle section of the inner spline cylinder (204); the outer spline cylinder (202) and the inner spline cylinder (204) are connected by the inner and outer spline pairs. The outer spline cylinder (202) and the inner spline cylinder (204) form an axially sealed telescopic fit, and the outer spline cylinder (202) and the inner spline cylinder (204) form an axially suspended fit through the suspension steps arranged on the inner and outer walls; the lower end of the lower variable buckle joint (205) is connected to the inner spline cylinder (204), and is axially connected to the pressure conversion device (3) through the sleeve (1); the pressure conversion device (3) comprises a throttling rotor (301), a throttling stator (302), a pressure conversion chamber housing (304), a transmission core shaft (305) and a transmission shaft (306); wherein the pressure conversion chamber housing (304) is a hollow cylinder, the upper end of which is connected to the segmented telescopic short section (2) through the sleeve (1); the pressure conversion chamber housing (304) is a hollow cylinder, the upper end of which is connected to the segmented telescopic short section (2) through the sleeve (1); 04) is connected to the turbine motor (4) at the lower end; the throttling stator (302) is a short column with an axial hole in the middle and a circulating fluid flow hole next to the axial hole. The throttling stator (302) is sealed and fixed in the middle section of the transformer housing (304); the throttling rotor (301) has a disc-shaped body at the upper end and a torsion transmission shaft at the lower end. The disc-shaped body has large holes and small holes arranged radially symmetrically. The disc-shaped body of the throttling rotor (301) is located on the upper end surface of the throttling stator (302). The torsion transmission shaft of the throttling rotor (301) is inserted into the axial hole of the throttling stator (302). The throttling rotor (301) and the throttling stator (302) form a rotating seal, and the throttling The large hole and the small hole of the rotor (301) are rotatably spaced to fit with the flow hole of the throttling stator (302); the upper end of the transmission core shaft (305) is connected to the extended end of the torsion transmission shaft of the throttling rotor (301), and the outer wall of the lower end is provided with an external spline pair; the inner wall of the upper section of the transmission shaft (306) is provided with an internal spline pair that fits with the external spline pair at the lower end of the throttling rotor (301); the turbine motor (4) comprises a turbine housing (405) and a turbine stator (402) fixed in the turbine housing (405), a turbine rotor (403) that fits with the turbine stator (402), and a motor output shaft (401) fixedly connected to the turbine rotor (403);The upper end of the turbine housing (405) is connected to the pressure conversion chamber housing (304) of the pressure conversion device (3), the upper end of the motor output shaft (401) is connected to the lower end of the transmission shaft (306) of the pressure conversion device (3), the lower end of the motor output shaft (401) is connected to the rotating guide shoe (5), and a bypass hole is provided on the motor output shaft (401) for connecting the upper turbine stator (402) and the gap between the turbine stator (402) and the flow channel of the rotating guide shoe (5). ; 2. The casing segmented pushing and running tool according to claim 1, Its characteristics are: The lower part of the motor output shaft (401) is axially limited in a box-shaped structure composed of a bearing cover (408) and a bearing cylinder (406) by a plane bearing (407), and the box-shaped structure is fixedly connected to the turbine housing (405) by pressure friction.

3. The casing segmented pushing and running tool according to claim 2, Its characteristics are: A plurality of sets of turbine rotors (403) are axially arranged on the motor output shaft (401) of the turbine motor (4), and a plurality of sets of turbine stators (402) matching therewith are fixed on the turbine housing (405).

4. The casing segmented pushing and running tool according to any one of claims 1 to 3, Its characteristics are: The inner wall at the lower end of the turbine housing (405) is connected to the straightening sleeve (409), and the upper outer wall of the rotating guide shoe (5) is rotationally matched with the straightening sleeve (409).

5. The casing segmented pushing and running tool according to any one of claims 1 to 3, Its characteristics are: The guide shoe cutting section of the rotating guide shoe (5) adopts a micro-helical structure and is provided with PDC cutting teeth; the gauge protection section adopts a 45° helical structure; and the nozzle at the lower end is perpendicular to the axis.

6. The casing segmented pushing and running tool according to any one of claims 1 to 3, Its characteristics are: A step is provided in the middle of the transformer chamber housing (304), the throttling stator (302) is mounted on the step, and a through-wall threaded hole is arranged on the side wall of the transformer chamber housing (304), and the throttling stator (302) is fixed by a limiting threaded pin (303).

7. The casing segmented pushing and running tool according to any one of claims 1 to 3, Its characteristics are: A sealing assembly (203) is provided at the joint between the outer spline cylinder (202) and the inner spline cylinder (204).

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