Electric direct drive disc brake device, system and method for drilling

Abstract

The application discloses a kind of electric direct drive disc brake devices, systems and methods for drilling.The device includes working tong, brake disc, drum and tong frame;The working tong includes first motor, swash plate gear, output gear, threaded push rod and brake pad;Swash plate gear has at least one lug, and is slidably disposed in the housing of working tong, can be engaged with output gear according to the preset transmission ratio positive and negative direction cyclic swing, brake pad is pressed to or away from brake disc.The system includes: controller and electric direct drive disc brake device for drilling;Controller is used to control the first motor in the case of drilling tool brake, brake pad is pressed to brake disc;In the case of drilling tool without brake, control the first motor reverse, brake pad is away from brake disc;In the case of drilling tool shutdown, control the second motor power failure, brake pad clamps brake disc.The device, system and method can effectively ensure brake safety, use electric drive mode, maintenance is simple, sensitive and reliable.

Description

[0001] This invention relates to the field of oil drilling equipment technology, and in particular to an electric direct-drive disc brake device, system and method for drilling. Background Technology

[0002] Disc brake systems rely on the interaction between the brake caliper and the brake disc to generate frictional torque for safe braking. They are commonly used in lifting equipment, wind power, mining machinery, and automobiles. Compared to traditional drum brakes and other braking methods, disc brakes have advantages such as compact structure, good thermal stability, less susceptibility to water and mud, good heat dissipation, and rapid braking.

[0003] Currently, the disc brakes used in the oil drilling and production field are mainly hydraulic disc brakes. Hydraulic disc brakes have a large braking torque and stable braking performance, but they lag behind in terms of structure, response speed, integration, modularity, and fluid management. Summary of the Invention

[0004] In view of the above problems, the present invention is proposed to provide a drilling electric direct-drive disc brake device, system and method that overcomes or at least partially solves the above problems.

[0005] In a first aspect, embodiments of the present invention provide an electric direct-drive disc brake device for drilling, comprising: at least one working tong, a brake disc, a roller, and a tong frame;

[0006] The brake disc is disposed on both sides of the roller; the clamp is disposed on the brake disc; the at least one working clamp is disposed on the clamp;

[0007] The at least one working clamp includes a first electric motor, a swashplate gear mechanism, a threaded push rod, and a brake pad; the swashplate gear mechanism includes a swashplate gear and an output gear; the swashplate gear mechanism, the threaded push rod, and the brake pad are connected in sequence;

[0008] The first electric motor is used to drive the swashplate gear when energized;

[0009] The swashplate has at least one lug, which is slidably disposed in the housing of the working pliers. When the first motor is powered on, the at least one lug of the swashplate oscillates in both directions according to a preset transmission ratio to mesh with the output gear, thereby driving the threaded push rod to extend or retract, and the brake pad to press against or move away from the brake disc.

[0010] In one embodiment, the above-described electric direct-drive disc brake device for drilling further includes a circular gear mechanism; the circular gear mechanism includes a small toothed pulley and a large toothed pulley.

[0011] The first motor is electrically connected to the small toothed pulley and is used to drive the small toothed pulley to rotate.

[0012] The swashplate gear is mounted on the hub at the output end of the large toothed pulley, and there is an angle between the axial direction of the swashplate gear and the hub, with the small toothed pulley meshing with the large toothed pulley.

[0013] In one embodiment, in the above-described electric direct-drive disc brake device for drilling, the number of teeth on the swashplate gear is greater than the number of teeth on the output gear.

[0014] In one embodiment, the above-described electric direct-drive disc brake device for drilling further includes a threaded sleeve in the working tongs; the threaded push rod is connected to the output gear through the threaded sleeve.

[0015] In one embodiment, the above-described electric direct-drive disc brake device for drilling further includes a pressure sleeve in the working tongs; the pressure sleeve is connected to a threaded push rod and is used to press against the brake disc under the push of the threaded push rod.

[0016] In one embodiment, the above-mentioned electric direct-drive disc brake device for drilling further includes: a safety clamp; the safety clamp is disposed on the clamp holder;

[0017] The safety clamp includes an electro-hydraulic actuator and brake pads; the electro-hydraulic actuator is connected between the brake pads;

[0018] The electro-hydraulic actuator is used to push the brake pads to release the brake disc when energized, and to pull back the brake pads to clamp the brake disc when de-energized.

[0019] In one embodiment, the electro-hydraulic actuator of the above-mentioned electric direct-drive disc brake device for drilling includes: a second electric motor, an impeller, a piston, a piston cylinder, and a return spring;

[0020] The second motor is electrically connected to the impeller; the impeller is located at the oil inlet of the piston cylinder; one end of the piston is located inside the piston cylinder, and the other end is connected to the brake pad; the return spring is located inside the piston cylinder and between the piston and the brake pad.

[0021] The impeller is used to drive oil into the piston cylinder when the second motor is energized, so as to push the piston to press the return spring.

[0022] In one embodiment, the aforementioned electric direct-drive disc brake device for drilling further includes a lever system, and the electro-hydraulic actuator is connected to the brake pads via the lever system.

[0023] Secondly, embodiments of the present invention provide an electric direct-drive disc brake system for drilling, comprising: a controller and an electric direct-drive disc brake device for drilling as described above;

[0024] The controller is connected to the first motor and the second motor of the electric direct-drive disc brake device for drilling, respectively.

[0025] The controller is used to send a first control signal to the first motor when the drill string is braked, to control the first motor to rotate forward and press the brake pads against the brake disc; when the drill string switches from a braked to an unbraked state, to send a second control signal to the first motor to control the first motor to rotate in reverse and move the brake pads away from the brake disc; and when the drill string needs to be stopped, to send a third control signal to the second motor to control the second motor to de-energize and clamp the brake pads against the brake disc.

[0026] Thirdly, embodiments of the present invention provide a method for using an electric direct-drive disc brake for drilling, the method being implemented using the aforementioned electric direct-drive disc brake system for drilling, the method comprising:

[0027] When the drill string is started and the controller is braking the drill string, it sends a first control signal to the first motor to control the first motor to rotate forward and press the brake pads against the brake disc; when the drill string switches from braking to non-braking state, it sends a second control signal to the first motor to control the first motor to rotate in reverse and move the brake pads away from the brake disc.

[0028] When the drill bit is stopped, a third control signal is sent to the second motor to de-energize the second motor and cause the brake pads to clamp the brake disc.

[0029] The beneficial effects of the above-described technical solutions provided in the embodiments of the present invention include at least the following:

[0030] The electric direct-drive disc brake device for drilling provided in this invention uses a swashplate gear that can cyclically mesh with the output gear in both forward and reverse directions according to a preset transmission ratio, achieving the effect of multi-stage gearbox speed reduction and torque increase. Because this electric direct-drive disc brake device uses an electric drive method, compared to hydraulic disc brakes, the device is simpler to maintain, easier to control, and more sensitive and reliable. Since it uses a gear transmission mechanism for power transmission, the electric direct-drive disc brake device for drilling is structurally simpler; in terms of control, only the forward and reverse rotation of the first motor needs to be controlled to achieve the clamping or disengaging of the working tongs from the brake disc, thus resulting in a fast response speed.

[0031] Furthermore, the threaded push rod is connected to the output gear via a threaded sleeve. This structure, using a threaded sleeve to connect the threaded push rod, effectively converts rotary motion into stroke motion.

[0032] Furthermore, the working tongs close when energized and open when de-energized; the safety tongs open when energized and close when de-energized. The safety tongs ensure that the drum is in a braking state when the drill is powered off and stopped, effectively guaranteeing braking safety.

[0033] Furthermore, the electric direct-drive disc brake device for drilling provided in this embodiment of the invention has braking functions in both the working tong and the safety tong. When the drilling tool needs to be stopped for a long time, that is, when both the first motor and the second motor are de-energized, the safety tong can play a braking and locking role, thereby avoiding damage caused by overheating of the motor while it is still powered on for a long time when the drilling tool is stationary.

[0034] Furthermore, the drilling electric direct-drive disc brake system and method provided in this embodiment of the invention controls the forward or reverse rotation of the first motor to make the working tongs press against or move away from the brake disc; controls the energization or de-energization of the second motor to make the safety tongs release or clamp the brake disc, so as to ensure that the drum is in a braking state when the drill string is powered off and stopped, effectively ensuring braking safety. Moreover, the drilling electric direct-drive disc brake system adopts an electric drive method, which is simple to maintain and sensitive and reliable.

[0035] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings.

[0036] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0037] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0038] Figure 1 This is a schematic diagram of the structure of the electric direct-drive disc brake device for drilling in an embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of the working clamp structure in an embodiment of the present invention;

[0040] Figure 3 This is a schematic diagram of the swashplate gear mechanism in an embodiment of the present invention;

[0041] Figure 4 This is a schematic diagram of the safety clamp structure in an embodiment of the present invention;

[0042] Figure 5 This is a schematic diagram of the electro-hydraulic actuator structure in an embodiment of the present invention;

[0043] Explanation of reference numerals in the attached figures:

[0044] 1-Working clamp; 2-Safety clamp; 3-Brake disc; 4-Roller; 5-Clamping frame; 11-First motor; 12-Small toothed pulley; 13-Large toothed pulley; 14-Helical gear; 15-Output gear; 16-Threaded sleeve; 17-Threaded push rod; 18-Pressure sleeve; 19-Brake pad; 21-Electro-hydraulic actuator; 22-Lever system; 23-Brake pad; 211-Second motor; 212-Impeller; 213-Piston; 214-Return spring. Detailed Implementation

[0045] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0046] Because hydraulic disc brakes have a large braking torque and stable braking performance, they also have significant differences in structure, response speed, integration, modularity, and fluid management, making them complex to control.

[0047] To address the aforementioned issues, embodiments of the present invention provide an electric direct-drive disc brake device, system, and method for drilling.

[0048] First, the electric direct-drive disc brake device for drilling provided in the embodiments of the present invention will be described in detail, referring to... Figure 1 As shown, the drilling electric direct-drive disc brake device specifically includes:

[0049] At least one working clamp 1, a brake disc 3, a roller 4, and a clamp holder 5; the brake disc 3 is disposed on both sides of the roller 4; the clamp holder 5 is disposed on the brake disc 3; at least one working clamp 1 is disposed on the clamp holder 5;

[0050] Reference Figure 2 As shown, at least one working clamp 1 includes a first motor 11, a swashplate gear 14 mechanism, a threaded push rod 17, and a brake pad 19; the swashplate gear 14 mechanism includes a swashplate gear 14 and an output gear 15; the swashplate gear 14 mechanism, the threaded push rod 17, and the brake pad 19 are connected in sequence; the first motor 11 is used to drive the swashplate gear 14 when energized.

[0051] Reference Figure 3 As shown, the swashplate 14 has at least one lug, which is slidably disposed in the housing of the working clamp 1. When the first motor is energized, the at least one lug of the swashplate 14 meshes with the output gear 15 in a forward and reverse cycle according to a preset transmission ratio, so as to drive the threaded push rod 17 to extend or retract, and the brake pad 19 to press against or move away from the brake disc 3.

[0052] The electric direct-drive disc brake device for drilling provided in this embodiment of the invention uses a swashplate gear 14 that can cyclically mesh with the output gear 15 in both forward and reverse directions according to a preset transmission ratio, achieving the effect of multi-stage gearbox speed reduction and torque increase. Because this electric direct-drive disc brake device for drilling uses an electric drive method, the device is simple to maintain and highly sensitive and reliable. The electric direct-drive disc brake device for drilling provided in this embodiment of the invention is applicable to the drilling field and is suitable for higher requirements of drill string braking, effectively improving the braking response speed, operating efficiency, and reliability of electric drive disc brake systems.

[0053] In a specific implementation of the present invention, for example, when the first motor rotates forward, the swashplate gear 14 meshes with the output gear 15 in a forward cycle, driving the threaded push rod 17 to extend and squeeze the brake pad 19, and the brake pad 19 presses against the brake disc 3; when the first motor rotates in reverse, the swashplate gear 14 meshes with the output gear 15 in a reverse cycle, driving the threaded push rod 17 to pull back the brake pad 19, and the brake pad 19 moves away from the brake disc 3.

[0054] In one embodiment, the aforementioned working clamp 1 further includes: a circular gear mechanism; the circular gear mechanism includes a small toothed pulley 12 and a large toothed pulley 13; a first motor is electrically connected to the small toothed pulley 12 for driving the small toothed pulley 12 to rotate; a swashplate gear 14 is disposed on the hub of the output end of the large toothed pulley 13, and the axial direction of the swashplate gear 14 is at an angle to the hub, and the small toothed pulley 12 meshes with the large toothed pulley 13. In the above structure, the small toothed pulley 12 and the large toothed pulley 13 are driven by a toothed belt.

[0055] In one embodiment, the number of teeth on the swashplate 14 is greater than the number of teeth on the output gear 15. In a specific implementation, the swashplate 14 is mounted on the hub of the output end of the large gear pulley 13, and the output gear 15 is fixed to the shaft. For example, the swashplate 14 has two lugs, and these two lugs are slidably disposed within the housing of the working clamp 1. (Refer to...) Figure 2 As shown, the outer casing is fixed to the clamp 5 (the lower lug of the outer casing is not shown in the picture).

[0056] Because the two lugs are slidably mounted inside the housing of the working clamp 1, the swashplate 14 cannot rotate when the first motor drives the small toothed pulley 12 to rotate; it can only oscillate. After the large toothed pulley 13 rotates half a turn, the swashplate 14 changes from a state where one lug is engaged with the output gear 15 to a state where the other lug is engaged with the output gear 15. For example, in a specific implementation, the swashplate 14 has 51 teeth, and the output gear 15 is a cylindrical gear with 50 teeth. Since the swashplate 14 and the output gear 15 cannot be fully engaged, but only on one tooth surface of the output gear 15, this engagement method allows the output gear 15 to rotate a small angle during the oscillation of the swashplate 14. For every one revolution of the large toothed pulley 13, the output gear 15 can rotate one tooth width. Since the output gear 15 has 50 teeth, for every 50 revolutions of the large toothed pulley 13, the output gear 15 rotates once, resulting in a transmission ratio of 50:1. The electric direct-drive disc brake device for drilling provided in this embodiment of the invention uses a swashplate gear 14 to achieve a large transmission ratio and realize the effect of multi-stage transmission speed reduction and torque increase.

[0057] In one embodiment, the working clamp 1 further includes a threaded sleeve 16; the threaded push rod 17 is connected to the output gear 15 through the threaded sleeve 16. The above structure, using the threaded sleeve 16 connected to the threaded push rod 17, effectively converts rotary motion into stroke motion.

[0058] In one embodiment, the working clamp 1 further includes a pressure sleeve 18; the pressure sleeve 18 is connected to a threaded push rod 17 and is used to press against the brake disc 3 under the push of the threaded push rod 17.

[0059] Reference Figure 2 As shown, the large gear belt, output gear 15, threaded sleeve 16, threaded push rod 17, pressure sleeve 18, and brake pad 19 are mounted on the same axis. The power of the large gear pulley 13 is transmitted to the threaded sleeve 16 via the swashplate gear 14 and the output gear 15. The rotation of the threaded sleeve 16 causes the threaded push rod 17 to move back and forth, converting the rotational motion of the output gear 15 into a stroke motion. In a specific implementation, the threaded push rod 17 is connected to the pressure sleeve 18, and the pressure sleeve 18 transmits the pressure or tension of the threaded push rod 17 to the brake pad 19, which ultimately presses against or moves away from the brake disc 3.

[0060] In one embodiment, the above-mentioned electric direct-drive disc brake device for drilling is referred to Figure 4 As shown, it also includes: safety clamp 2; safety clamp 2 is mounted on clamp holder 5;

[0061] The safety clamp 2 includes an electro-hydraulic actuator 21 and a brake pad 23; the electro-hydraulic actuator 21 is connected between the brake pads 23; the electro-hydraulic actuator 21 is used to push the brake pads 23 to release the brake disc 3 when the power is on, and to pull back the brake pads 23 to clamp the brake disc 3 when the power is off.

[0062] In practical implementation, the above-mentioned electric direct-drive disc brake device for drilling may include, for example, three working tongs 1 and one safety tong 2. The working tongs 1 are closed when energized and open when de-energized; the safety tong 2 is open when energized and closed when de-energized. The safety tong 2 can ensure that the drum 4 is in a braking state when the drill is powered off and stopped, effectively ensuring braking safety.

[0063] In one embodiment, the electro-hydraulic actuator 21 includes: a second electric motor 211, an impeller 212, a piston 213, a piston cylinder, and a return spring 214; see reference. Figure 5 As shown, the second motor 211 is electrically connected to the impeller 212; the impeller 212 is located at the oil inlet of the piston cylinder; one end of the piston 213 is located inside the piston cylinder, and the other end is connected to the brake pad 23; the return spring 214 is located inside the piston cylinder and between the piston 213 and the brake pad 23; the impeller 212 is used to drive the oil into the piston cylinder when the second motor is energized, so as to push the piston 213 to press the return spring 214.

[0064] In one embodiment, the safety clamp 2 further includes a lever system 22, and the electro-hydraulic actuator 21 is connected to the brake pad 23 through the lever system 22. In a specific implementation, the two ends of the electro-hydraulic actuator are connected to the brake pad 23 through the lever system 22. When the electro-hydraulic actuator 21 extends, i.e., the second motor is energized, the piston 213 is driven to press the return spring 214, and the brake pad 23 releases the brake disc 3. When the electro-hydraulic actuator 21 retracts, i.e. the second motor is de-energized, the return spring 214 resets and pushes the piston 213 to retract, and the brake pad 23 clamps the brake disc 3.

[0065] The drilling electric direct-drive disc brake device provided in this embodiment of the invention has a braking function in both the working tong 1 and the safety tong 2. When the drilling tool needs to be stopped for a long time, that is, when both the first motor and the second motor are de-energized, the safety tong 2 can play the role of braking and locking, thereby avoiding damage caused by the motor being powered on for a long time while the drilling tool is stationary and overheating.

[0066] This invention also provides an electric direct-drive disc brake system for drilling, which specifically includes: a controller and an electric direct-drive disc brake device for drilling as provided in the foregoing embodiments;

[0067] The controller is connected to the first motor 11 and the second motor 211 of the electric direct-drive disc brake device for drilling. When the drill string is braked, the controller sends a first control signal to the first motor 11 to control the first motor to rotate forward and the brake pad 19 to press against the brake disc 3. When the drill string switches from the braked state to the unbraked state, the controller sends a second control signal to the first motor 11 to control the first motor to rotate in reverse and the brake pad 19 to move away from the brake disc 3. When the drill string needs to be stopped, the controller sends a third control signal to the second motor to control the second motor to de-energize and the brake pad 23 to clamp the brake disc 3.

[0068] The electric direct-drive disc brake system for drilling provided in this embodiment of the invention controls the forward or reverse rotation of the first motor to make the working tongs 1 press against or move away from the brake disc 3; and controls the power on or off of the second motor to make the safety tongs 2 release or clamp the brake disc 3, so as to ensure that the drum 4 is in a braking state when the drill string is powered off and stopped, effectively ensuring braking safety. Moreover, the electric direct-drive disc brake system for drilling adopts an electric drive method, which is simple to maintain and sensitive and reliable.

[0069] This invention also provides a method for using an electric direct-drive disc brake for drilling, which is implemented using the aforementioned electric direct-drive disc brake system for drilling. The method specifically includes:

[0070] When the drill string is started and the controller is braking the drill string, it sends a first control signal to the first motor 11 to control the first motor to rotate forward and the brake pad 19 presses against the brake disc 3; when the drill string switches from braking to non-braking state, it sends a second control signal to the first motor 11 to control the first motor to rotate in reverse and the brake pad 19 moves away from the brake disc 3.

[0071] When the drill bit is stopped, a third control signal is sent to the second motor to de-energize the second motor and cause the brake pad 23 to clamp the brake disc 3.

[0072] The electric direct-drive disc brake method for drilling provided in this invention is suitable for braking needs during both start-up and shutdown of the drilling tool, and the method is simple and effective.

[0073] The following example illustrates the electric direct-drive disc brake device, system, and method for drilling provided in the embodiments of the present invention.

[0074] like Figure 1 As shown, the drilling electric direct-drive disc brake device in this example includes three working clamps 1 and one safety clamp 2, which are located on clamp holders 5 on both sides of the drum 4.

[0075] like Figure 2 As shown, the working clamp 1 provided by this invention operates as follows:

[0076] When the drill bit is powered on, the controller controls the first motor 11 to rotate forward, which rotates the threaded sleeve 16 through the circular gear mechanism and the swashplate gear 14. The rotation of the threaded sleeve 16 causes the threaded push rod 17 on the thread to move forward. The threaded push rod 17 moves to the pressure sleeve 18 and presses the pressure sleeve 18 against the brake pad 19. When one brake pad 19 presses against the brake disc 3, the reaction force causes the clamp 5 to move away from the brake disc 3, which in turn drives the other clamp 5 and the brake pad 19 to clamp the brake disc 3.

[0077] When the drill bit is powered on, the brake is released, the controller controls the first motor 11 to reverse, the threaded push rod 17 on the threaded sleeve 16 moves backward, the pressure sleeve 18 is released and retracted, the brake pad 19 leaves the brake disc, and at the same time the clamp 5 moves towards the brake disc 3, causing the other clamp 5 and brake pad 19 to move away from the brake disc 3.

[0078] When the drill is stopped, the second motor 211 in the electro-hydraulic actuator 21 is de-energized, the impeller 212 stops running, the oil flows back from the hydraulic cylinder, the piston 213 returns to its original position under the action of the return spring 214, and through the action of the lever system 22, the brake pad 23 finally presses against the brake disc 3 to complete the braking process.

[0079] When the drilling tool is switched from shutdown to startup, such as Figure 4 and Figure 5 As shown, when the safety brake 2 needs to be released, the second motor 211 inside the electro-hydraulic actuator 21 is energized and operates. Driven by the second motor 211, the impeller 212 agitates the oil at a certain speed. Under the action of centrifugal force, the oil moves along the inner wall of the piston cylinder, enters the piston cylinder and impacts the piston 213, generating thrust. This thrust overcomes the force of the return spring 214, causing the piston 213 to move. Under the transmission and amplification of the lever system 22, a gap appears between the brake pad 23 and the brake disc, completing the brake release process.

[0080] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A direct-drive electric disc brake device for drilling, characterized in that, include: At least one working clamp, brake disc, roller, and clamp holder; The brake disc is disposed on both sides of the roller; the clamp is disposed on the brake disc; the at least one working clamp is disposed on the clamp; The at least one working clamp includes a first electric motor, a swashplate gear mechanism, a threaded push rod, and a brake pad; the swashplate gear mechanism includes a swashplate gear and an output gear; the swashplate gear mechanism, the threaded push rod, and the brake pad are connected in sequence; The first electric motor is used to drive the swashplate gear when energized; The swashplate has at least one lug, which is slidably disposed in the housing of the working pliers. When the first motor is powered on, the at least one lug of the swashplate oscillates in both directions according to a preset transmission ratio to mesh with the output gear, thereby driving the threaded push rod to extend or retract, and the brake pad to press against or move away from the brake disc.

2. The electric direct-drive disc brake device for drilling as described in claim 1, characterized in that, The working clamp further includes: a circular gear mechanism; the circular gear mechanism includes a small toothed pulley and a large toothed pulley; The first motor is electrically connected to the small toothed pulley and is used to drive the small toothed pulley to rotate. The swashplate gear is mounted on the hub at the output end of the large toothed pulley, and there is an angle between the axial direction of the swashplate gear and the hub, with the small toothed pulley meshing with the large toothed pulley.

3. The electric direct-drive disc brake device for drilling as described in claim 2, characterized in that, The number of teeth on the swashplate gear is greater than the number of teeth on the output gear.

4. The drilling electric direct-drive disc brake device as described in any one of claims 1-3, characterized in that, The working clamp also includes a threaded sleeve; the threaded push rod is connected to the output gear through the threaded sleeve.

5. The electric direct-drive disc brake device for drilling as described in any one of claims 1-3, characterized in that, The working clamp also includes a pressure sleeve; the pressure sleeve is connected to a threaded push rod and is used to press against the brake disc under the push of the threaded push rod.

6. The electric direct-drive disc brake device for drilling as described in any one of claims 1-3, characterized in that, Also includes: Safety clamp; the safety clamp is mounted on the clamp holder; The safety clamp includes an electro-hydraulic actuator and brake pads; the electro-hydraulic actuator is connected between the brake pads; The electro-hydraulic actuator is used to push the brake pads to release the brake disc when energized, and to pull the brake pads back to clamp the brake disc when de-energized.

7. The electric direct-drive disc brake device for drilling as described in claim 6, characterized in that, The electro-hydraulic actuator includes: a second electric motor, an impeller, a piston, a piston cylinder, and a return spring; The second motor is electrically connected to the impeller; the impeller is located at the oil inlet of the piston cylinder; one end of the piston is located inside the piston cylinder, and the other end is connected to the brake pad; the return spring is located inside the piston cylinder and between the piston and the brake pad. The impeller is used to drive oil into the piston cylinder when the second motor is energized, so as to push the piston to press the return spring.

8. The electric direct-drive disc brake device for drilling as described in any one of claims 6 or 7, characterized in that, The safety clamp also includes a lever system, and the electro-hydraulic actuator is connected to the brake pads through the lever system.

9. An electrically powered direct drive disc brake system for use in drilling a well, characterised in that, include: The controller and the electric direct-drive disc brake device for drilling as described in any one of claims 1-8; The controller is connected to the first motor and the second motor of the electric direct-drive disc brake device for drilling, respectively. The controller is used to send a first control signal to the first motor when the drill string is braked, to control the first motor to rotate forward and press the brake pads against the brake disc; and to send a second control signal to the first motor when the drill string switches from a braked to an unbraked state, to control the first motor to rotate in reverse and move the brake pads away from the brake disc. When the drilling tool needs to be stopped, a third control signal is sent to the second motor to de-energize the second motor and cause the brake pads to clamp the brake disc.

10. An electrically powered direct drive disc brake method for drilling a well, characterized by, The method is implemented using an electric direct-drive disc brake system for drilling as described in claim 9, and the method includes: When the drill string is started and the controller is braking the drill string, it sends a first control signal to the first motor to control the first motor to rotate forward and press the brake pads against the brake disc; when the drill string switches from braking to non-braking state, it sends a second control signal to the first motor to control the first motor to rotate in reverse and move the brake pads away from the brake disc. When the drill bit is stopped, a third control signal is sent to the second motor to de-energize the second motor and cause the brake pads to clamp the brake disc.

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