Permanent magnet direct-drive top drive, power transmission system thereof and permanent magnet direct-drive top drive system

Abstract

The invention discloses a permanent-magnet direct-drive top drive and a power transmission system thereof, a permanent-magnet direct-drive top drive system and a power transmission system.The permanent-magnet direct-drive top drive system comprises a permanent-magnet direct-drive motor and a main shaft used for being connected with a drilling tool, the permanent-magnet direct-drive motor is provided with a rotor, and the rotor is connected with the main shaft through an expansion sleeve to transmit torque; the permanent magnet direct-drive top drive comprises a top drive monitoring group and the power transmission system, the top drive monitoring group comprises the transmission system monitoring group, and the top drive monitoring group is connected with the input end of the control assembly; the permanent magnet direct-drive top drive system comprises a guide rail assembly used for being installed on a derrick, a permanent magnet direct-drive top drive and the control assembly, and the permanent magnet direct-drive top drive is installed on the guide rail assembly. The device has the advantages of being smaller in size, lighter in weight and higher in efficiency; meanwhile, the top drive system can meet the requirements for high automation and intelligence of drilling operation.

Description

Technical Field

[0001] The invention relates to the field of drilling devices, in particular to a permanent magnet direct drive top drive and a power transmission system thereof, and a permanent magnet direct drive top drive system. Background Art

[0002] The top drive drilling device significantly improves the efficiency and safety of drilling operations, replaces the traditional rotary operation mode and becomes the standard configuration of today's oil drilling industry. With the innovation of drilling technology, higher requirements are put forward for the power, torque, volume, etc. of the top drive during the operation process - smaller volume, greater torque, and higher power. The traditional top drive relies on the gearbox to reduce the speed and increase the torque of the motor, and the performance parameters meet the requirements of drilling operations; but due to the intervention of the gearbox, the working efficiency of the whole machine is reduced, the complexity of the mechanical system is increased, and the failure rate of the product is increased. Based on the mechatronics design concept, the direct drive top drive cancels the gearbox transmission mode and relies on a low-speed, high-torque AC variable frequency asynchronous motor to directly drive the spindle for drilling, which greatly improves the transmission efficiency, reduces the complexity of the system, and reduces the failure rate of the equipment; but the disadvantage is that the direct drive motor is large in size and heavy in weight, which is particularly obvious when it is adapted to a small drilling and repair machine.

[0003] Therefore, a new solution needs to be proposed. Summary of the invention

[0004] The object of the present invention is to provide a permanent magnet direct drive top drive and its power transmission system, and a permanent magnet direct drive top drive system in response to the above-mentioned problems, which have the advantages of smaller size, lighter weight and higher efficiency; at the same time, the top drive system can meet the requirements of highly automated and intelligent drilling operations.

[0005] The technical solution adopted by the present invention is as follows: a power transmission system of a permanent magnet direct drive top drive, comprising a permanent magnet direct drive motor and a main shaft for connecting with a drilling tool;.

[0006] The permanent magnet direct drive motor has a rotor, and the rotor is connected to the main shaft through an expansion sleeve to transmit torque.

[0007] Furthermore, it also includes a lifting box fixed above the permanent magnet direct drive motor, the main shaft passes through the lifting box and a main bearing is arranged between the main shaft and the lifting box; the lifting box supports the main bearing, and the main bearing supports the main shaft.

[0008] Furthermore, it also includes a control assembly and a transmission system monitoring group, which is installed on the power transmission system and is used to obtain status data of the power transmission system operation; the transmission system monitoring group is connected to the input end of the control assembly, and the output end of the control assembly is connected to the power transmission system.

[0009] Furthermore, the transmission system monitoring group includes a built-in encoder arranged on the main shaft to obtain the rotation speed of the main shaft.

[0010] Furthermore, the transmission system monitoring group also has at least one or more components among a temperature sensor, a wind pressure sensor, a vibration sensor and a grease status detector; the temperature sensor is used to obtain the operating temperature of the permanent magnet direct drive motor and / or the main bearing; the wind pressure sensor is arranged at the fan of the permanent magnet direct drive motor to obtain the wind pressure of the fan; the vibration sensor obtains the vibration state of the main bearing; and the grease status detector is used to obtain the state of the grease of the main bearing.

[0011] A permanent magnet direct drive top drive comprises a top drive monitoring group and a power transmission system of the permanent magnet direct drive top drive, wherein the top drive monitoring group comprises the transmission system monitoring group, and the top drive monitoring group is connected to an input end of a control assembly.

[0012] Furthermore, the permanent magnet direct drive top drive also has a rotating head assembly, which includes a rotating head for hanging a lifting ring and a rotating drive device for driving the rotating head to rotate; the rotating head is coaxially connected to the main shaft for rotation, and the rotating drive device is fixed on the lower end cover of the permanent magnet direct drive motor; the rotating drive device and the rotating head are connected by a gear transmission mechanism.

[0013] Furthermore, the top drive monitoring group includes an encoder, which is arranged on the gear transmission mechanism to obtain the rotation angle of the rotary head; the encoder is connected to the input end of the control assembly, and the output end of the control assembly is connected to the rotary drive device.

[0014] Furthermore, the permanent magnet direct-drive top drive also has a lifting ring hung on the rotating head and a lifting ring tilting device for driving the lifting ring to rotate, and the lifting ring tilting device is installed on the rotating head; the top drive monitoring group includes an angle monitoring device, which is installed on the lifting ring. The angle monitoring device is connected to the input end of the control assembly, and the output end of the control assembly is connected to the lifting ring tilting device.

[0015] Furthermore, the permanent magnet direct-drive top drive also has an I BOP assembly suspended below the main shaft, the I BOP assembly includes a mud valve and an actuator, the actuator is installed outside the mud valve, and the actuator is connected to the mud valve through a hexagonal knob; the actuator includes a driving hydraulic cylinder indirectly installed on the housing of the mud valve, the output end of the driving hydraulic cylinder is connected to a sliding sleeve, the sliding sleeve is slidably connected to the main shaft, and the sliding direction is along the axial direction of the main shaft; the sliding sleeve is fixed with a rack, and a knob gear is fixed on the hexagonal knob, and the rack is meshed with the knob gear.

[0016] Furthermore, the top drive monitoring group includes a displacement sensor, which is arranged on the driving hydraulic cylinder. The displacement sensor is connected to the input end of the control assembly, and the output end of the control assembly is connected to the driving hydraulic cylinder.

[0017] A permanent magnet direct drive top drive system comprises a guide rail assembly for installation on a derrick, a permanent magnet direct drive top drive and the control assembly, wherein the permanent magnet direct drive top drive is installed on the guide rail assembly; the control assembly comprises a top drive electric control box, a top drive control room and a top drive operating box, a top drive monitoring group is connected to the top drive electric control box, the top drive electric control box is connected to the top drive control room via a wired or wireless method, and the top drive control room is connected to the top drive operating box via a wired or wireless method.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0019] 1. The present invention eliminates the traditional gearbox transmission mode and the conventional AC variable frequency asynchronous motor, adopts a permanent magnet direct drive motor, and uses an expansion sleeve connection between the rotor and the main shaft to transmit torque, thereby achieving a small size and light weight, that is, a smaller size, lighter weight, and higher efficiency;

[0020] 2. The present invention is equipped with a top drive monitoring group to obtain the working data and status data of the permanent magnet direct drive top drive, and cooperate with the control assembly to improve the safety, digitization and intelligentization of the top drive operation, and meet the requirements of highly automated and intelligent drilling operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a three-dimensional diagram of a permanent magnet direct drive top drive;

[0024] Figure 3 This is the front view of the permanent magnet direct drive top drive;

[0025] Figure 4 This is a schematic diagram of the top view of the permanent magnet direct drive top drive;

[0026] Figure 5 is a schematic cross-sectional view of the power transmission system;

[0027] Figure 6 Schematic diagram of the appearance structure of a permanent magnet direct drive motor;

[0028] Figure 7 Schematic diagrams of three arrangements of guide rail assemblies that cooperate with permanent magnet direct drive top drive;

[0029] Figure 8 It is a structural schematic diagram of the rotating head;

[0030] Fig. 9 It is a structural diagram of the lifting ring;

[0031] Fig.10 It is the structural schematic diagram of I BOP assembly;

[0032] Fig.11 It is a structural diagram of the control assembly.

[0033] Markings in the figure: 1-permanent magnet direct drive top drive; 2-guide rail assembly; 3-top drive operation box; 4-permanent magnet direct drive motor; 5-rotating head; 6-back clamp; 7-lifting ring; 8-lifting ring tilting device; 9-I BOP assembly; 10-main shaft; 11-lifting box; 12-rotor; 13-stator; 14-casing; 15-built-in encoder; 16-main bearing; 17-expansion sleeve; 18-lower end cover; 19-power transmission system; 20-fan; 21-transmission system monitoring group; 22-top drive electric control box; 23-angle monitoring device; 24-rotation drive device; 25-driven gear; 26-encoder; 27-gear transmission mechanism; 28-mud valve; 29-displacement sensor; 30-driving hydraulic cylinder; 31-hexagonal knob; 32-sliding sleeve; 33-knob gear; 34-rack; 35-wireless module; 36-top drive control room. DETAILED DESCRIPTION

[0034] In the description of this specification, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of this specification is usually placed when used. It is only for the convenience of describing this specification and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this specification.

[0035] In addition, if the terms "horizontal" or "vertical" appear in the description of this specification, it does not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] In the description of this specification, it should also be noted that, unless otherwise clearly stipulated and limited, the terms "set", "installed", "connected" and "connected" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be a connection between the internal parts of two elements.

[0037] It should be noted that the permanent magnet direct-drive top drive mainly includes a balancing system, a power transmission system, a hydraulic system, a back-up clamp 6, a gooseneck assembly, a disc brake device, a lifting ring tilting device, a pulley, a flushing pipe assembly, a rotating head, an I BOP assembly and other structures; unless otherwise specified in this specification, these structures are structures known to technical personnel in this field.

[0038] Example 1

[0039] like Figure 1-Figure 11 As shown, a power transmission system 19 of a permanent magnet direct drive top drive 1 includes a permanent magnet direct drive motor 4 and a main shaft 10 for connecting to a drilling tool;.

[0040] The permanent magnet direct drive motor 4 has a rotor 12 , and the rotor 12 is connected to the main shaft 10 via a shrink sleeve 17 to transmit torque.

[0041] Specifically, the rotor 12 is connected to the main shaft 10 through the expansion sleeve 17. In fact, the main shaft 10 passes through the rotor 12. The expansion sleeve 17 is located outside the central axis of the rotor 12. The rotor 12 and the main shaft 10 are clearance-fitted. The inner wall of the rotor 12 and the outer wall of the main shaft 10 are expanded and connected through the expansion sleeve 17, so that the rotor 12 drives the main shaft 10 to rotate.

[0042] More specifically, the permanent magnet direct drive motor 4 has a housing 14 and a stator 13 fixedly connected to the housing 14, a rotor 12 rotatably connected to the housing, and a lower end cover 18, and a fan 20 is arranged on the housing for air cooling the permanent magnet direct drive motor 4; after the permanent magnet direct drive motor 4 obtains energy, the rotor 12 can cooperate with the stator 13 to realize the relative rotation of the rotor 12 and the stator 13, that is, the rotor 12 rotates and the stator 13 is fixed; the lower end cover 18 fixes the lower end of the housing 14 to achieve the closure of the housing 14, and cooperates with the housing 14 to protect the rotor 12 and the stator 13; two fans 20 can be set, namely a left fan 20 and a right fan 20, both of which are fixed on the housing 14, and the permanent magnet direct drive motor 4 can be air cooled by suction or / and blowing. The coordination of these structures is known to those skilled in the art and will not be described in detail in this specification.

[0043] To sum up, the power transmission system 19 disclosed in this embodiment cancels the traditional gearbox transmission mode and the conventional AC variable frequency asynchronous motor, adopts a permanent magnet direct drive motor 4, and the rotor 12 and the main shaft 10 are connected by a expansion sleeve 17 to transmit torque, thereby achieving a small size and light weight, that is, smaller size, lighter weight, and higher efficiency.

[0044] Example 2

[0045] On the basis of the embodiments, specific implementation methods that can be implemented are further proposed.

[0046] In a feasible implementation, the power transmission system 19 also includes a lifting box 11 fixed above the permanent magnet direct drive motor 4, the main shaft 10 passes through the lifting box 11, and a main bearing 16 is arranged between the main shaft 10 and the lifting box 11; the lifting box 11 supports the main bearing 16, and the main bearing 16 supports the main shaft 10; when the main shaft 10 hangs the drilling tool, the load of the drilling tool is transmitted to the main bearing 16 through the main shaft 10, and the load on the main bearing 16 is then transmitted to the lifting box 11, and finally the drilling tool load is borne by the traveling hoisting system directly or indirectly connected to the lifting box 11. The traveling hoisting system is connected to a traveling carriage, which is installed on the permanent magnet direct drive top drive 1, and the traveling carriage is movably connected to the guide rail assembly 2; under the action of the traveling hoisting system, the traveling carriage carries the permanent magnet direct drive top drive 1 up and down along the guide rail assembly 2 to complete various drilling operations. Furthermore, when drilling, the drill bit is suspended on the lifting card of the lifting ring 7, and the load of the drill bit is transmitted to the lifting ears at both ends of the rotating head 5 through the lifting ring 7, and then transmitted to the load-bearing nut (the load-bearing nut is connected to the main shaft 10, supporting the rotating head 5 rotatably connected to the main shaft 10), and finally transmitted to the traveling lifting system through the main shaft 10.

[0047] In a feasible implementation mode, the power transmission system 19 further includes a control assembly and a transmission system monitoring group 21, the transmission system monitoring group 21 is installed on the power transmission system 19, and is used to obtain the state data of the power transmission system 19; the transmission system monitoring group 21 is connected to the input end of the control assembly, and the output end of the control assembly is connected to the power transmission system 19; specifically, the transmission system monitoring group 21 is a general term for multiple sensors, which can obtain the working data and state data of the power transmission system 19, such as the speed of the main shaft 10, the operating temperature of the permanent magnet direct drive motor 4, the operating temperature of the main bearing 16, the wind pressure of the fan 20 used for cooling on the permanent magnet direct drive motor 4, the vibration state of the main bearing 16 supporting the main shaft 10, the state of the grease at the main bearing 16, etc., and the transmission system monitoring group 21 transmits the obtained information data to the control assembly, and the control assembly analyzes the data and performs feedback control or / and alarm on the operation of the power transmission system 19. The details are as follows.

[0048] The transmission system monitoring group 21 includes a built-in encoder 15 arranged on the main shaft 10 to obtain the rotational speed of the main shaft 10; the built-in encoder 15 is connected to the input end of the control assembly, and the output end of the control assembly is connected to the permanent magnet direct drive motor 4; specifically, the built-in encoder 15 is used to provide real-time feedback on the actual rotational speed of the main shaft 10, and transmit the rotational speed signal data to the control assembly, and the control assembly feedback controls the permanent magnet direct drive motor 4 according to the actual rotational speed and the target rotational speed, thereby realizing closed-loop control to achieve the effect of precise control of the rotational speed and torque.

[0049] The transmission system monitoring group 21 includes a temperature sensor, which is arranged on the casing 14 of the permanent magnet direct drive motor 4 to obtain the operating temperature of the permanent magnet direct drive motor 4; or / and the temperature sensor is arranged on the lifting box 11 to obtain the operating temperature of the main bearing 16; the temperature sensor is connected to the control assembly to transmit the obtained temperature data to the control assembly. When the temperature data obtained by the control assembly exceeds the set value, the control assembly will perform an alarm operation to remind the operator to handle it.

[0050] The transmission system monitoring group 21 includes a wind pressure sensor, which is arranged near the fan 20. The wind pressure sensor is connected to the control assembly, and can collect the wind pressure data of the fan 20 in real time and transmit the wind pressure data to the control assembly; when the wind pressure data obtained by the control assembly exceeds the set value, the control assembly will perform an alarm operation to remind the operator to take action.

[0051] The transmission system monitoring group 21 includes a vibration sensor for obtaining the vibration state of the main bearing 16. The vibration sensor is connected to the control assembly and can collect the vibration state data of the main bearing 16 in real time and transmit the vibration state data to the control assembly. After the control assembly obtains the vibration state data, it determines whether the main bearing 16 is in a healthy state.

[0052] It should be noted that the vibration sensor may be a piezoelectric vibration sensor, which can be installed on the main bearing 16 ; or it may be an eddy current vibration sensor, which can be installed next to the main bearing 16 in the lifting box 11 .

[0053] The transmission system monitoring group 21 includes a grease status detector, which can be installed in the lifting box 11 to obtain the status of the grease; the grease status detector is connected to the control assembly to transmit the grease status data to the control assembly.

[0054] It should be noted that the state data of the grease, the vibration state data of the main bearing 16 and the temperature data of the main bearing 16 can be used to comprehensively judge the health state of the main bearing 16 .

[0055] Example 3

[0056] like Figure 1-Figure 11As shown, a permanent magnet direct drive top drive 1 includes a top drive monitoring group and a power transmission system 19 of the permanent magnet direct drive top drive 1 described in any one of the embodiments 1-2, the top drive monitoring group includes the transmission system monitoring group 21, and the top drive monitoring group is connected to the input end of the control assembly. The top drive monitoring group obtains the working data of the permanent magnet direct drive top drive 1 and transmits the working data to the control assembly. The control assembly pre-tightens and controls the work of the permanent magnet direct drive top drive 1 according to the obtained working data, improves the safety and digitalization and intelligentization of the operation of the permanent magnet direct drive top drive 1, and meets the requirements of highly automated and intelligent drilling operations.

[0057] Example 4

[0058] Based on Example 3, a feasible specific implementation method is further proposed.

[0059] A feasible implementation manner, the permanent magnet direct drive top drive 1 also has a rotating head assembly, the rotating head assembly includes a rotating head 5 for hanging the lifting ring 7 and a rotating drive device 24 for driving the rotating head 5 to rotate; the rotating head 5 is coaxially connected to the main shaft 10, and the rotating drive device 24 is fixed on the lower end cover 18 of the permanent magnet direct drive motor 4; the rotating drive device 24 and the rotating head 5 are connected through a gear transmission mechanism 27; specifically, the rotating drive device 24 can be a servo motor or a hydraulic motor, and the output end of the rotating drive device 24 is provided with a driving gear, and the outer side of the rotating head 5 is provided with a driven gear 25; the master and slave gears are connected to the driven gear 25 through a gear transmission mechanism 27 (intermediate gear set); that is, the rotating drive device 24 is started, and rotates with the driving gear, thereby transmitting the rotation to the input end of the gear transmission mechanism 27, and the output end of the gear transmission mechanism 27 rotates with the driven gear 25, thereby rotating with the rotating head 5, thereby realizing the control of the rotation direction and rotation angle of the rotating head 5.

[0060] Furthermore, the top drive monitoring group includes an encoder 26, which is arranged on the gear transmission mechanism 27 to obtain the rotation angle of the rotating head 5; the encoder 26 is connected to the input end of the control assembly, and the output end of the control assembly is connected to the rotation drive device 24, and the rotation amount of the gear transmission mechanism 27 is obtained through the angle encoder 26, and then the rotation amount of the driven gear 25 is obtained; the angle encoder 26 transmits the obtained rotation amount to the control assembly, and the control assembly then controls the rotation drive device 24 according to the rotation amount feedback, thereby accurately controlling the rotation direction and rotation angle of the rotating head 5.

[0061] A feasible implementation mode, the permanent magnet direct drive top drive 1 also has a lifting ring 7 hung on the rotating head 5 and a lifting ring tilting device 8 for driving the lifting ring 7 to rotate, the lifting ring tilting device 8 is installed on the rotating head 5, and the specific structure of the lifting ring tilting device 8 belongs to the structure known to those skilled in the art, and will not be described in detail here. It should be noted that, in this embodiment, the top drive monitoring group includes an angle monitoring device 23, the angle monitoring device 23 is installed on the lifting ring 7, and the angle monitoring device 23 is connected to the input end of the control assembly. The angle controller obtains the rotation angle of the lifting ring 7, and transmits the rotation angle data to the control assembly, and obtains the spatial position of the lifting ring 7 in the derrick in real time.

[0062] Furthermore, the lifting ring tilting device 8 can be connected to the control assembly, and the control assembly can control the tilting angle of the lifting ring 7 by controlling the lifting ring tilting device 8, thereby further realizing safety protection and avoiding collision accidents when the lifting ring 7 tilts forward and backward.

[0063] In a feasible implementation manner, the permanent magnet direct drive top drive 1 further comprises an I BOP assembly 9 suspended below the main shaft 10. The BOP assembly 9 includes a mud valve 28 and an actuator, wherein the actuator is installed outside the mud valve 28, and the actuator is connected to the mud valve 28 through a hexagonal knob 31; the actuator includes a driving hydraulic cylinder 30 indirectly installed on the housing of the mud valve 28, wherein the output end of the driving hydraulic cylinder 30 is connected to a sleeve 32, wherein the sleeve 32 is slidably connected to the main shaft 10, and the sliding direction is along the axial direction of the main shaft 10; a rack 34 is fixed to the sleeve 32, and a knob gear 33 is fixed to the hexagonal knob 31, wherein the rack 34 is meshed with the knob gear 33; specifically, when the driving hydraulic cylinder 30 works, the sleeve 32 slides up and down, and the sleeve 32 slides while the rack 34 moves up and down, and the rack 34 moves up and down thereby driving the knob gear 33, and the knob gear 33 drives the hexagonal knob 31 to rotate, thereby realizing the opening and closing of the mud valve 28, and controlling the opening degree.

[0064] Furthermore, the top drive monitoring group includes a displacement sensor 29, which is arranged on the driving hydraulic cylinder 30. The displacement sensor 29 is connected to the input end of the control assembly, and the output end of the control assembly is connected to the driving hydraulic cylinder 30; the displacement sensor 29 obtains the displacement of the driving hydraulic cylinder 30, that is, it can obtain the opening of the mud valve 28; the displacement sensor 29 transmits the displacement of the driving hydraulic cylinder 30 to the control assembly, and the control assembly controls the extension amount of the driving hydraulic cylinder 30 according to the feedback of the displacement, thereby realizing the opening and closing of the mud valve 28, as well as the precise control of the opening.

[0065] Example 5

[0066] like Figure 1-Figure 11As shown, a permanent magnet direct drive top drive system comprises a guide rail assembly 2 for installation on a derrick, a permanent magnet direct drive top drive 1 described in any one of the embodiments 3-4, and the control assembly, wherein the permanent magnet direct drive top drive 1 is installed on the guide rail assembly 2; the control assembly comprises a top drive electric control box 22, a top drive control room 36 and a top drive operating box 3, and the top drive control room 36 and the top drive operating box 3 can be arranged in the driller's room of the drilling rig; the top drive monitoring group is connected to the top drive electric control box 22, and the top drive electric control box 22 is connected to the top drive control room 36 by wired or wireless means, and the top drive control room 36 is connected to the top drive operating box 3 by wired or wireless means; the top drive control room 36 is provided with equipment such as a frequency converter and an electric control system, and the signal data obtained by the top drive monitoring group is transmitted to the top drive control room 36 through the top drive electric control box 22 for analysis and processing; the top drive operating box 3 controls the permanent magnet direct drive top drive 1 through the top drive control room 36 and the top drive electric control box 22.

[0067] Of course, wireless modules 35 can be set in the top drive electric control box 22, the top drive control box room and the top drive operation box 3 to realize wireless data transmission.

[0068] In this embodiment, according to the structural form of the drilling rig, the arrangement position of the guide rail assembly 2 relative to the permanent magnet direct drive top drive 1 can be front, side, or rear.

[0069] To sum up, the permanent magnet direct drive top drive 1 system disclosed in this embodiment cancels the traditional gear box transmission mode and the conventional AC variable frequency asynchronous motor, adopts a permanent magnet direct drive motor 4, and the rotor 12 and the main shaft 10 are connected by a sleeve connection to transmit torque, thereby achieving a small size and light weight, that is, a smaller size, lighter weight, and higher efficiency; and the permanent magnet direct drive top drive 1 system is equipped with a top drive monitoring group to obtain the working data and status data of the permanent magnet direct drive top drive 1, and cooperates with the control assembly to improve the safety and digitalization and intelligentization of the top drive operation, and meet the requirements of highly automated and intelligent drilling operations.

[0070] The present invention is not limited to the above-mentioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A power transmission system of a permanent magnet direct drive top drive, characterized in that: It comprises a permanent magnet direct drive motor (4) and a main shaft (10) for connecting to a drilling tool; the permanent magnet direct drive motor (4) has a rotor (12), and the rotor (12) is connected to the main shaft (10) via an expansion sleeve (17) to transmit torque.

2. The power transmission system according to claim 1, characterized in that: It also includes a lifting box (11) fixed above the permanent magnet direct drive motor (4), the main shaft (10) passes through the lifting box (11), and a main bearing (16) is arranged between the main shaft (10) and the lifting box (11); the lifting box (11) supports the main bearing (16), and the main bearing (16) supports the main shaft (10).

3. The power transmission system according to claim 2, characterized in that: It also includes a control assembly and a transmission system monitoring group (21), wherein the transmission system monitoring group (21) is installed on the power transmission system (19) and is used to obtain operating status data of the power transmission system (19); the transmission system monitoring group (21) is connected to the input end of the control assembly, and the output end of the control assembly is connected to the power transmission system (19).

4. The power transmission system according to claim 3, characterized in that: The transmission system monitoring group (21) comprises a built-in encoder (15) arranged on the main shaft (10) to obtain the rotation speed of the main shaft (10).

5. The power transmission system according to claim 3, characterized in that: The transmission system monitoring group (21) further comprises at least one or more components of a temperature sensor, a wind pressure sensor, a vibration sensor and a grease state detector; the temperature sensor is used to obtain the operating temperature of the permanent magnet direct drive motor (4) and / or the main bearing (16); the wind pressure sensor is arranged at the fan (20) of the permanent magnet direct drive motor (4) and is used to obtain the wind pressure of the fan (20); the vibration sensor obtains the vibration state of the main bearing (16); and the grease state detector is used to obtain the state of the grease of the main bearing (16).

6. A permanent magnet direct drive top drive, characterized in that: The invention comprises a top drive monitoring group and a power transmission system of a permanent magnet direct drive top drive as described in any one of claims 1 to 5, wherein the top drive monitoring group includes the transmission system monitoring group (21), and the top drive monitoring group is connected to the input end of the control assembly.

7. The permanent magnet direct drive top drive according to claim 6, characterized in that: The permanent magnet direct drive top drive (1) also has a rotating head assembly, which comprises a rotating head (5) for hanging a lifting ring (7) and a rotating drive device (24) for driving the rotating head (5) to rotate; the rotating head (5) is coaxially connected to the main shaft (10), and the rotating drive device (24) is fixed to the lower end cover (18) of the permanent magnet direct drive motor (4); the rotating drive device (24) and the rotating head (5) are connected via a gear transmission mechanism (27).

8. The permanent magnet direct drive top drive according to claim 7, characterized in that: The top drive monitoring group comprises an encoder (26), which is arranged on a gear transmission mechanism (27) to obtain the rotation angle of the rotary head (5); the encoder (26) is connected to the input end of the control assembly, and the output end of the control assembly is connected to the rotary drive device (24).

9. The permanent magnet direct drive top drive according to claim 7, characterized in that: The permanent magnet direct drive top drive (1) further comprises a lifting ring (7) hung on a rotating head (5) and a lifting ring tilting device (8) for driving the lifting ring (7) to rotate, wherein the lifting ring tilting device (8) is mounted on the rotating head (5); the top drive monitoring group comprises an angle monitoring device (23), wherein the angle monitoring device (23) is mounted on the lifting ring (7), wherein the angle monitoring device (23) is connected to an input end of a control assembly, and wherein an output end of the control assembly is connected to the lifting ring tilting device (8).

10. The permanent magnet direct drive top drive according to claim 6, characterized in that: The permanent magnet direct drive top drive (1) further comprises an IBOP assembly (9) suspended below the main shaft (10), the IBOP assembly (9) comprising a mud valve (28) and an actuator, the actuator being mounted outside the mud valve (28), and the actuator being connected to the mud valve (28) via a hexagonal knob (31); the actuator comprising a driving hydraulic cylinder (30) being indirectly mounted on a housing of the mud valve (28), the output end of the driving hydraulic cylinder (30) being connected to a sliding sleeve (32), the sliding sleeve (32) being slidably connected to the main shaft (10), and the sliding direction being along the axial direction of the main shaft (10); a rack (34) being fixed to the sliding sleeve (32), a knob gear (33) being fixed to the hexagonal knob (31), and the rack (34) being meshed with the knob gear (33).

11. The permanent magnet direct drive top drive according to claim 10, characterized in that: The top drive monitoring group comprises a displacement sensor (29), which is arranged on a driving hydraulic cylinder (30), the displacement sensor (29) is connected to an input end of a control assembly, and an output end of the control assembly is connected to the driving hydraulic cylinder (30).

12. A permanent magnet direct drive top drive system, characterized in that: It comprises a guide rail assembly (2) for installation on a derrick, a permanent magnet direct drive top drive (1) as described in any one of claims 6 to 11, and the control assembly, wherein the permanent magnet direct drive top drive (1) is installed on the guide rail assembly (2); the control assembly comprises a top drive electric control box (22), a top drive control room (36) and a top drive operating box (3), the top drive monitoring group is connected to the top drive electric control box (22), the top drive electric control box (22) is connected to the top drive control room (36) by wire or wireless means, and the top drive control room (36) is connected to the top drive operating box (3) by wire or wireless means.

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