A downhole turbocharged cycloidal motor power take-off

Abstract

The application relates to a downhole turbocharged cycloidal motor power output device, which comprises an upper joint, an outer cylinder and a bearing section, wherein the outer cylinder is internally composed of an upper turbocharged flow distribution mechanism, a motor power mechanism and a lower turbocharged flow distribution mechanism and the like components; the upper turbocharged flow distribution mechanism is mainly composed of upper turbine blades and a flow distribution disc, the upper turbine blades are arranged on the upper end of the flow distribution disc and are used for increasing the drilling fluid pressure of the flow distribution disc; the motor power mechanism is mainly composed of a cycloidal stator and a cycloidal rotor, the cycloidal rotor is arranged in the stator with a certain eccentric distance and generates planetary motion to output power; the lower turbocharged flow distribution mechanism is composed of upper and lower turbines and a turbine retainer lower part and is used for accelerating the drilling fluid flow in a low-pressure area and improving the pressure drop and power output of the cycloidal motor; thus, the application creatively proposes the downhole turbocharged cycloidal motor power output device to solve the problems of low pressure drop, low torque and low output efficiency of the traditional downhole motor.

Description

Technical Field

[0001] This application relates to downhole motors, and more particularly to a downhole turbocharged cycloidal motor power output device. Background Technology

[0002] Currently, with the increase in downhole drilling depth, the requirements for the efficiency of downhole motor output are becoming increasingly higher. Conventional downhole motors mainly include screw motors and turbine motors. Traditional screw motors are unsuitable for increasingly deep drilling because the temperature of the stator rubber bushing at the bottom of the well should not exceed 180℃. All-metal screw motors suffer from excessive leakage due to the gap between the stator and rotor, making it impossible for the motor output power to meet drilling requirements. Turbine motors, due to their impact-type working method, have low torque and low output efficiency, making them unable to drill normally. Therefore, this application combines the volumetric characteristics of screw motors with the high-temperature resistance of all-metal components of turbine motors to propose a downhole turbocharged cycloidal motor power output device. This power output device features low leakage, high output torque, and high efficiency, meeting the drilling needs of deep and ultra-deep wells.

[0003] Regarding the aforementioned technologies, traditional downhole motors suffer from problems such as being unable to withstand high temperatures and insufficient output power during ultra-deep well drilling and production. This application proposes a downhole turbocharged cycloidal motor power output device. Summary of the Invention

[0004] In order to enable effective drilling in ultra-deep wells and high-temperature formations, the present invention provides a downhole turbocharged cycloidal motor power output device.

[0005] This application provides a downhole turbocharged cycloidal motor power output device, specifically adopting the following technical solution:

[0006] A downhole turbocharged cycloidal motor power output device is characterized by comprising an upper connector, an outer cylinder, and a bearing section. The upper connector and the outer cylinder are connected by threads, and the other end of the outer cylinder is threaded to the bearing section. The outer cylinder mainly consists of an upper turbocharger distribution mechanism, a motor power mechanism, and a lower turbocharger depressurization mechanism. The upper turbocharger distribution mechanism is located at the front end of the motor power mechanism, and the two are connected via a universal joint. The lower turbocharger depressurization mechanism is located at the end of the motor power mechanism, and the two are connected via a universal joint. A centering bearing and a lower retaining ring are installed between the lower turbocharger depressurization mechanism and the power output shaft. The power output shaft and the bearing section are connected by a hexagonal torque spline to output torque.

[0007] By adopting the above technical solution, the upper turbine booster distribution mechanism is mainly composed of upper turbine blades, distribution plate and distribution plate retaining ring. The upper turbine blades are arranged at the upper end of the water distributor head by nut and thread connection to increase the drilling fluid pressure in the distribution plate.

[0008] Preferably, the motor adopts an upper turbocharger distribution mechanism. Depending on the drilling requirements and the motor distribution capacity, multiple sets of turbocharger blades can be set to increase the motor distribution pressure and increase the motor output power.

[0009] By adopting the above technical solution, the distribution plate is arranged between the water distribution head and the baffle ring of the distribution plate. The positioning hole on the water distribution head is aligned with the positioning hole of the baffle ring for positioning, which facilitates the distribution plate to distribute the water.

[0010] Preferably, the motor power mechanism mainly consists of a stator and a rotor. The stator is an n-tooth cycloidal stator, and the rotor is an n-1-tooth cycloidal rotor. The rotor has an internal spline, which is connected to the upper part of the internal spline and the lower part of the internal spline. The rotor is arranged inside the stator with an eccentric distance e from the center line of the stator, forming a high-pressure initial engagement point and a high-pressure final engagement point to seal the high-pressure working area, and a low-pressure initial engagement point and a low-pressure final engagement point to seal the low-pressure area.

[0011] By adopting the above technical solution, the rotor in the motor power mechanism is assembled with an eccentric distance from the stator centerline, and rotates in a planetary eccentric manner within the stator, thereby outputting torque.

[0012] Preferably, the lower turbine depressurization mechanism consists of an upper turbine retaining ring, a lower turbine, and a lower turbine retaining ring. The turbine retaining ring is provided with a low-pressure channel, an annular notch, and a positioning hole.

[0013] By adopting the above technical solution, the low-pressure channel is a low-pressure drilling fluid decompression channel, the circumferential notch is used to reduce the overall mass of the motor, and the positioning hole is used to position the motor power mechanism, thereby increasing the overall stability of the motor.

[0014] Preferably, the lower turbine is arranged between the turbine retaining ring and the turbine retaining ring. The lower turbine has an internal spline and blades. The internal spline of the lower turbine is connected to the external spline of the main shaft for the power output shaft to drive the lower turbine blades to rotate.

[0015] By adopting the above technical solution, the lower turbine accelerates the flow of drilling fluid from the motor, thereby increasing the pressure drop of the motor and improving the motor's power output.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] 1. The upper turbocharger distribution mechanism consists of upper turbine blades, a distribution plate, and a distribution plate retaining ring. Depending on the drilling requirements and the motor distribution capacity, multiple sets of turbocharger blades can be set to increase the motor distribution pressure and increase the motor output power.

[0018] 2. The motor power mechanism mainly consists of a stator and a rotor. The rotor is assembled with an eccentric distance from the center line of the stator and rotates in a planetary eccentric manner within the stator, thereby outputting torque.

[0019] 3. The turbine retaining ring is equipped with a low-pressure channel, a circumferential notch, and a positioning hole. The low-pressure channel is a low-pressure drilling fluid depressurization channel, the circumferential notch is used to reduce the overall weight of the motor, and the positioning hole is used to position the motor with the motor power mechanism, thereby increasing the overall stability of the motor.

[0020] 4. The lower turbine is positioned between the turbine retaining ring and the turbine retaining ring to accelerate the flow of drilling fluid from the motor, thereby increasing the pressure drop of the motor and improving the motor's power output. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the downhole turbocharged cycloidal motor power output device in the embodiments of this application;

[0022] Figure 2 This is a schematic diagram illustrating the turbine and distribution structure of a turbocharged cycloidal motor;

[0023] Figure 3 This is a schematic diagram showing the positions of the cycloidal motor's distribution mechanism and distribution plate;

[0024] Figure 4 This is a schematic diagram showing the distribution holes at the bottom of the cycloidal motor distribution plate;

[0025] Figure 5 This is a schematic diagram illustrating the axial separation of the stator and rotor of a wheel-boosting cycloidal motor.

[0026] Figure 6 This is a schematic diagram showing the positional relationship between the stator and rotor end faces;

[0027] Figure 7 It is a schematic diagram showing the changes in flow distribution that reflect the rotational states of the stator and rotor;

[0028] Figure 8 This is a schematic diagram illustrating the bottom supercharger turbine structure of the cycloidal motor;

[0029] Figure 9 It is the spindle that embodies the output power of the cycloidal motor.

[0030] Explanation of reference numerals in the attached drawings: 1. Upper connector; 2. Outer cylinder; 3. Retaining ring; 4. Upper turbocharger distribution mechanism; 401. Nut; 402. Upper turbine blade; 403. Thread; 404. Positioning hole; 405. Water distribution head; 406. Distribution plate; 40601. Upper channel of distribution plate; 40602. Internal spline; 40603. Distribution hole; 40604. Lower channel of distribution plate; 407. Retaining ring of distribution plate; 40701. Retaining ring positioning hole; 40702. Distribution channel; 408. On the universal joint; 5. Motor power mechanism; 501. Rotor; 502. Stator; 503. Internal spline; 504. Stator overflow channel; 5 5. High-pressure initial engagement point; 506. High-pressure final engagement point; 507. Low-pressure initial engagement point; 508. Low-pressure final engagement point; 6. Lower universal joint; 7. Lower turbine decompression mechanism; 701. Upper turbine retaining ring; 70101. Low-pressure channel; 70102. Circumferential notch; 70103. Positioning hole; 702. Lower turbine; 70201. Lower turbine internal spline; 70202. Lower turbine blade; 703. Lower turbine retaining ring; 8. Straightening bearing; 9. Lower retaining ring; 10. Power output shaft; 1001. Main shaft internal spline; 1002. Main shaft external spline; 1003. Water outlet; 1004. Hexagonal transmission spline; 11. Bearing joint. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0032] This application discloses a downhole turbocharged cycloidal motor power output device. (Refer to...) Figure 1 The downhole turbocharged cycloidal motor power output device includes an upper connector 1, an outer cylinder 2, and a bearing section 11. The upper connector 1 and the outer cylinder 2 are connected by threads, and the other end of the outer cylinder 2 is threaded to the bearing section 11. The outer cylinder 2 mainly consists of an upper turbocharger distribution mechanism 4, a motor power mechanism 5, and a lower turbocharger depressurization mechanism 7. The upper turbocharger distribution mechanism 4 is located at the front end of the motor power mechanism 5, and the two are connected by a universal joint 408. The lower turbocharger depressurization mechanism 7 is located at the end of the motor power mechanism 5, and the two are connected by a universal joint 6. A centering bearing 8 and a lower retaining ring 9 are installed between the lower turbocharger depressurization mechanism 7 and the power output shaft 10. The power output shaft 10 and the bearing section 11 are connected by a hexagonal transmission spline 1004 to output torque.

[0033] Reference Figure 2 , Figure 3 and Figure 4The upper turbocharger distribution mechanism 4 mainly consists of an upper turbine blade 402, a distribution plate 406, and a distribution plate retaining ring 407. The upper turbine blade 402 is positioned above the water distributor 405 via a nut 401 and thread 403 connection to increase the drilling fluid pressure within the distribution plate 406. The distribution plate 406 is positioned between the water distributor 405 and the distribution plate retaining ring 407. A positioning hole 404 on the water distributor 405 aligns with the positioning hole 40701 on the retaining ring for positioning, facilitating distribution by the distribution plate 406. The distribution plate 406 has an upper channel 40601, an internal spline 40602, and a distribution hole 40603. The upper channel 40601 and the lower channel 40604 are connected by an interval of one channel. The upper channel 40601 and the distribution channel 40702 are combined to distribute fluid to the motor, driving its rotation.

[0034] Reference Figure 1 , Figure 5 , Figure 6 and Figure 7 The motor power mechanism 5 mainly consists of a stator 502 and a rotor 501. The stator 502 is an n-tooth cycloidal stator, and the rotor 501 is an n-1 tooth cycloidal rotor. The rotor 501 has an internal spline 503. The upper part of the internal spline 503 is connected to the upper universal joint 408, and the lower part of the internal spline 503 is connected to the lower universal joint 6. The rotor 501 is arranged in the stator 502 with an eccentric distance e from the center line of the stator 502, forming a high-pressure initial engagement point 505 and a high-pressure final engagement point 506 to seal the high-pressure working area, and a low-pressure initial engagement point 507 and a low-pressure final engagement point 508 to seal the low-pressure area. Under the action of the upper turbocharger distribution mechanism 4, the rotor 501 rotates 80°, 160° and 240° in the stator 502 in a planetary eccentric motion mode to complete one rotation cycle, thereby outputting torque.

[0035] Reference Figure 1 and Figure 8 The lower turbine pressure reducing mechanism 7 consists of an upper turbine retaining ring 701, a lower turbine 702, and a lower turbine retaining ring 703. The upper turbine retaining ring 701 is provided with a low-pressure channel 70101, a circumferential notch 70102, and a positioning hole 70103. The low-pressure channel 70101 is a low-pressure drilling fluid relief channel. The circumferential notch 70102 is used to reduce the overall weight of the motor. The positioning hole 70103 is used to position the motor power mechanism 5, thereby increasing the overall stability of the motor. The lower turbine 702 is arranged between the upper turbine retaining ring 701 and the lower turbine retaining ring 703. The lower turbine 702 is provided with a lower turbine internal spline 70201 and a lower turbine blade 70202. The lower turbine internal spline 70201 is connected to the main shaft external spline 1002 so that the power output shaft 10 can drive the lower turbine 702 to rotate, accelerate the flow of drilling fluid, thereby increasing the pressure drop of the motor and improving the output power of the motor.

[0036] Reference Figure 1 and Figure 9 Above the power output shaft 10, the main shaft internal spline 1001, the main shaft external spline 1002, the water outlet 1003, and the hexagonal transmission spline 1004 are arranged. The main shaft internal spline 1001 is connected to the lower universal joint 6 and is used to transmit power from the motor rotor 501 to the power output shaft 10. The main shaft external spline 1002 is connected to the lower turbine internal spline 70201. The water outlet 1003 is used for drilling fluid to flow out. The hexagonal transmission spline 1004 is connected to the front end of the bearing section 11 and outputs the motor torque.

[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A downhole turbocharged cycloidal motor power output device, characterized in that, It includes an upper connector (1), an outer cylinder (2), and a bearing section (11). The upper connector (1) and the outer cylinder (2) are connected by threads, and the other end of the outer cylinder (2) is threaded to the bearing section (11). The outer cylinder (2) is mainly composed of an upper turbocharger distribution mechanism (4), a motor power mechanism (5), and a lower turbo depressurization mechanism (7). The upper turbocharger distribution mechanism (4) is located at the front end of the motor power mechanism (5), and the two are connected by a universal joint (408). The lower turbo depressurization mechanism (7) is located at the end of the motor power mechanism (5), and the two are connected by a universal joint (6). A centering bearing (8) and a lower retaining ring (9) are installed between the lower turbo depressurization mechanism (7) and the power output shaft (10). The force output shaft (10) and the bearing section (11) are connected by a hexagonal transmission spline (1004) to output torque; the upper turbine booster distribution mechanism (4) is mainly composed of upper turbine blades (402), distribution plate (406) and distribution plate retaining ring (407). The upper turbine blades (402) are arranged on the upper end of the water distribution head (405) by connecting the nut (401) and the thread (403) to increase the drilling fluid pressure in the distribution plate (406); the distribution plate (406) is arranged between the water distribution head (405) and the distribution plate retaining ring (407). The positioning hole (404) on the water distribution head (405) is aligned with the positioning hole (40701) of the retaining ring for positioning, so as to facilitate the distribution of the distribution plate (406).

2. The downhole turbocharged cycloidal motor power output device according to claim 1, characterized in that: The distribution plate (406) is provided with an upper channel (40601), an internal spline (40602), and a distribution hole (40603). The upper channel (40601) and the lower channel (40604) of the distribution plate are connected by a channel. The upper channel (40601) and the distribution channel (40702) are combined to distribute the motor power and drive the motor to rotate.

3. The downhole turbocharged cycloidal motor power output device according to claim 1, characterized in that: The motor power mechanism (5) mainly consists of a stator (502) and a rotor (501). The stator (502) is an n-tooth cycloidal stator with a stator overflow channel (504) on it. The rotor (501) is an n-1 tooth cycloidal rotor with an internal spline (503) inside. The inner spline (503) is connected to the upper universal joint (408), and the inner spline (503) is connected to the lower universal joint (6). The rotor (501) is arranged in the stator (502) with an eccentric distance e from the center line of the stator (502), forming a high-pressure initial engagement point (505) and a high-pressure final engagement point (506) to seal the high-pressure working area, and a low-pressure initial engagement point (507) and a low-pressure final engagement point (508) to seal the low-pressure area. Under the action of the upper turbocharger distribution mechanism (4), the rotor (501) rotates in the stator (502) in a planetary eccentric manner, thereby outputting torque.

4. The downhole turbocharged cycloidal motor power output device according to claim 1, characterized in that: The lower turbine pressure relief mechanism (7) consists of an upper turbine retaining ring (701), a lower turbine (702), and a lower turbine retaining ring (703). The upper turbine retaining ring (701) is provided with a low-pressure channel (70101), a ring notch (70102), and a positioning hole (70103). The low-pressure channel (70101) is a low-pressure drilling fluid relief channel. The ring notch (70102) is used to reduce the overall mass of the motor. The positioning hole (70103) is used to position the motor power mechanism (5), thereby increasing the overall stability of the motor.

5. The downhole turbocharged cycloidal motor power output device according to claim 4, characterized in that: The lower turbine (702) is arranged between the turbine retaining ring (701) and the turbine retaining ring (703). The lower turbine (702) is provided with the lower turbine internal spline (70201) and the lower turbine blade (70202). The lower turbine internal spline (70201) is connected to the main shaft external spline (1002) and is used by the power output shaft (10) to drive the lower turbine (702) to rotate, accelerate the flow of drilling fluid, thereby increasing the pressure drop of the motor and improving the output power of the motor.

6. The downhole turbocharged cycloidal motor power output device according to claim 5, characterized in that: The main shaft internal spline (1001), main shaft external spline (1002), water outlet (1003), and hexagonal transmission spline (1004) are arranged above the power output shaft (10). The main shaft internal spline (1001) is connected to the lower universal joint (6) for transmitting power from the motor rotor (501) to the power output shaft (10). The main shaft external spline (1002) is connected to the lower turbine internal spline (70201). The water outlet (1003) is used for drilling fluid to flow out. The hexagonal transmission spline (1004) is connected to the front end of the bearing section (11) to output motor torque.

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