A spring-loaded directional drilling system and equipment

Abstract

This invention provides a slow-release directional drilling system and equipment, applicable in the field of directional drilling equipment. The key technical features include: a sliding drive motor; a translation conversion mechanism for converting the torque output by the sliding drive motor into a force driving the drill rod to slide axially; a first braking device, which slows down the drill rod sliding when energized and is electrically connected to the sliding drive motor; a rotary drive motor for driving the drill rod to rotate; and a second braking device, which slows down the drill rod rotation when energized and is electrically connected to the rotary drive motor. The technical effect is that it can slow down the reverse rotation speed of the drill rod pulling motor and provides a certain degree of protection for the equipment.

Description

Technical Field

[0001] This invention relates to the field of directional drilling equipment, and in particular to a spring-loaded directional drilling system and equipment. Background Technology

[0002] Horizontal directional drilling rigs are construction machines used to lay various underground utilities (pipelines, cables, etc.) without excavating the ground surface. They are widely used in the construction of flexible pipelines for water supply, electricity, telecommunications, natural gas, coal gas, and oil. They are suitable for sandy soil, clay, and other soil conditions and have the advantages of fast construction speed, high construction accuracy, and low cost.

[0003] The drill rod of a horizontal directional drilling rig is designed in sections. During drilling, the drill rod extends into the soil section by section. After drilling is completed, the drill rod needs to be driven to rotate in the opposite direction while being pulled back. Then, the pulled-back drill rods are removed one by one. When removing the drill rods, the driving of the drill rods needs to be stopped. When the drill rods are driven, because the rods are very long, a certain amount of elastic potential energy will accumulate along the length of the rods and along the direction of rotation. At the moment the driving of the drill rods stops, the elastic potential energy accumulated on the rods will be released, causing the drill rods to slide and rotate in the opposite direction. The motor that drives the drill rods to be pulled back quickly reverses, which can easily cause damage to the equipment. Summary of the Invention

[0004] The first aspect of the present invention provides a slow-release directional drilling system, which has the advantage of slowing down the reverse rotation speed of the drill rod pumping motor and providing a certain degree of protection for the equipment.

[0005] A second aspect of the present invention provides a spring-loaded directional drilling device.

[0006] The first aspect of this invention provides the following technical solution: a spring-loaded directional drilling system, comprising:

[0007] Sliding drive motor;

[0008] The translation conversion mechanism is used to convert the torque output by the sliding drive motor into a force that drives the drill rod to move axially.

[0009] The first braking device is electrically connected to the sliding drive motor and is used to energize the sliding drive motor when it is reversed by the drill pipe to generate electricity, and to apply reverse torque to the output shaft of the sliding drive motor to reduce the speed of the output shaft of the sliding drive motor.

[0010] A rotary drive motor for driving the drill pipe to rotate; and,

[0011] The second braking device is electrically connected to the rotary drive motor and is used to energize the rotary drive motor when it is reversed by the drill rod to generate electricity, and to apply a reverse torque to the output shaft of the rotary drive motor to reduce the speed of the output shaft of the rotary drive motor.

[0012] The above technical solution requires that the sliding drive motor and the rotary drive motor be stopped before the drill pipe is removed. At the instant the sliding drive motor and the rotary drive motor stop, the elastic potential energy accumulated in the rod body will be released, causing the sliding drive motor and the rotary drive motor to reverse. When the sliding drive motor reverses, it will generate electricity. After being energized, the first braking device applies a force to the output shaft of the sliding drive motor to limit its rotation, thereby reducing the speed of the output shaft of the sliding drive motor and quickly hindering the rebound of the drill pipe, thus providing a certain degree of protection for the equipment. The working principle of the second braking device is the same as that of the first braking device.

[0013] In one embodiment of the present invention, the translation conversion mechanism includes: a gear rail; a sliding seat mounted on the gear rail, the sliding seat being capable of reciprocating along the gear rail, and a drill rod supported on the sliding seat; a first reducer mounted on the sliding seat, the input shaft of which is driven to rotate by the output shaft of the sliding drive motor; and a gear, driven to rotate by the output shaft of the first reducer and meshing with the gear rail.

[0014] Through the above technical solution, the sliding drive motor drives the gear to rotate. When the gear rotates, it moves along the toothed track, thereby driving the sliding seat to slide back and forth along the toothed track, thereby driving the drill rod to extend or retract. The first reducer reduces the speed of the gear, thereby controlling the sliding speed of the sliding seat, so that the extension or retraction speed of the drill rod adapts to the drilling requirements.

[0015] In one embodiment of the present invention, the first braking device is configured as a first magnetic powder brake, and the output shaft of the first magnetic powder brake is circumferentially fixed to the gear.

[0016] Through the above technical solution, the first magnetic powder brake acts directly on the gear to reduce the speed of the gear when it is pulled by the drill rod, thereby reducing the speed of the output shaft of the first reducer. This prevents the reverse speed of the output shaft of the first reducer from being too fast when the drill rod is pulled, which would exceed the limit speed of the first reducer and cause damage to the first reducer, thus protecting the first reducer. At the same time, as the elastic potential energy of the drill rod is released, the reverse force of the sliding drive motor when the drill rod is pulled will decrease. At this time, the power generation of the sliding drive motor will also decrease, and the torque applied by the first magnetic powder brake to the sliding drive motor will also decrease accordingly. This will gradually stop the drill rod and slowly release its elastic potential energy.

[0017] In one embodiment of the present invention, the first braking device is configured as a first hollow shaft magnetic powder brake, the output shaft of the sliding drive motor passes through the hollow shaft of the first braking device and is keyed to the hollow shaft of the first braking device, and the output shaft of the sliding drive motor is drivenly connected to the input shaft of the first reducer.

[0018] Through the above technical solution, the first braking device reduces the rotational speed of the output shaft of the sliding drive motor and the input shaft of the first reducer when energized, thereby preventing the drill rod from pulling the output shaft of the first reducer to reverse too quickly and exceeding the limit speed of the first reducer, thus damaging the first reducer and protecting it.

[0019] In one embodiment of the present invention, the first braking device is configured as a first electromagnetic brake, the output shaft of the sliding drive motor passes through the rotor of the first electromagnetic brake and is drivenly connected to the rotor of the first electromagnetic brake, and the output shaft of the sliding drive motor is drivenly connected to the input shaft of the first reducer.

[0020] Through the above technical solution, the first electromagnetic brake reduces the rotational speed of the output shaft of the sliding drive motor and the input shaft of the first reducer when energized, thereby preventing the drill rod from pulling the output shaft of the first reducer to reverse too quickly and exceeding the limit speed of the first reducer, thus damaging the first reducer and protecting it.

[0021] In one embodiment of the present invention, the rotary drive motor is connected to the drill rod via a second reducer, the output shaft of the rotary drive motor drives the input shaft of the second reducer to rotate, and the output shaft of the second reducer drives the drill rod to rotate.

[0022] Through the above technical solution, the second reducer reduces the drill rod speed, keeping the drill rod speed within a suitable range for drilling.

[0023] In one embodiment of the present invention, the second braking device is configured as a second magnetic powder brake, and the output shaft of the second magnetic powder brake is connected to the drill rod drive.

[0024] Through the above technical solution, the second magnetic powder brake reduces the rotation speed of the drill rod after being energized, thereby reducing the rotation speed of the output shaft of the second reducer. This prevents the drill rod from pulling the output shaft of the second reducer to rotate too fast, exceeding the limit speed of the second reducer and causing damage to the second reducer.

[0025] In one embodiment of the present invention, the second braking device is configured as a second hollow shaft magnetic powder brake, the output shaft of the rotary drive motor passes through the hollow shaft of the second hollow shaft magnetic powder brake and is keyed to the hollow shaft, and the output shaft of the rotary drive motor is drivenly connected to the input shaft of the second reducer.

[0026] Through the above technical solution, the second hollow shaft magnetic powder brake reduces the rotational speed of the output shaft of the rotary drive motor and the input shaft of the second reducer when energized, so as to prevent the drill rod from pulling the output shaft of the second reducer to rotate too fast, exceeding the limit speed of the second reducer and causing damage to the second reducer.

[0027] In one embodiment of the present invention, the second braking device is configured as a second electromagnetic brake, the output shaft of the rotary drive motor passes through the rotor of the second electromagnetic brake and is drivenly connected to the rotor of the second electromagnetic brake, and the output shaft of the rotary drive motor is drivenly connected to the input shaft of the second reducer.

[0028] Through the above technical solution, the second electromagnetic brake reduces the rotational speed of the output shaft of the sliding drive motor and the input shaft of the second reducer when energized, thereby preventing the drill rod from pulling the output shaft of the second reducer to reverse too quickly, exceeding the limit speed of the second reducer and causing damage to the second reducer, thus protecting the second reducer.

[0029] A second aspect of the present invention provides the following solution: a spring-loaded directional drilling device, comprising the above-mentioned spring-loaded directional drilling system.

[0030] As described above, the spring-loaded directional drilling system and equipment of the present invention have the following beneficial effects:

[0031] Before removing the drill pipe, the sliding drive motor and the rotary drive motor need to be stopped. At the instant the sliding drive motor and the rotary drive motor stop, the elastic potential energy accumulated in the pipe body will be released, causing the sliding drive motor and the rotary drive motor to reverse. When the sliding drive motor reverses, it will generate electricity. After being energized, the first braking device applies a force to the output shaft of the sliding drive motor to limit its rotation, thereby reducing the speed of the output shaft of the sliding drive motor and quickly hindering the rebound of the drill pipe, thus providing a certain degree of protection for the equipment. The working principle of the second braking device is the same as that of the first braking device. Attached Figure Description

[0032] Figure 1 The diagram shown is a schematic of the spring-loaded directional drilling equipment disclosed in Embodiment 1 of the present invention.

[0033] Explanation of the technical feature labels in the attached drawings:

[0034] 1. Sliding drive motor; 2. First braking device; 3. Rotary drive motor; 4. Drill rod; 5. Second braking device; 6. Gear rail; 7. Sliding seat; 8. First reducer; 9. Gear; 10. Car body; 11. Second reducer. Detailed Implementation

[0035] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. It should be noted that, unless otherwise specified, the following embodiments and features described herein can be combined with each other. Example 1

[0036] Please see Figure 1 The present invention provides a spring-loaded directional drilling device, comprising:

[0037] The vehicle body 10 is equipped with a spring-loaded directional drilling system, which includes a sliding drive motor 1, a translation conversion mechanism, a first braking device 2, a rotary drive motor 3, and a second braking device 5.

[0038] Please see Figure 1 The translation conversion mechanism includes: a gear rail 6 mounted on the vehicle body 10; a sliding seat 7 slidably mounted on the gear rail 6, the sliding seat 7 being able to slide back and forth along the gear rail 6, a drill rod 4 being rotatably connected to the sliding seat 7 via bearings, the drill rod 4 being segmented, the last segment of the drill rod 4 being connected to the sliding seat 7, and the axial direction of the drill rod 4 being the same as the length direction of the gear rail 6; a first reducer 8 whose housing is fixed to the sliding seat 7 by screws, the input shaft of the first reducer 8 being driven to rotate by the output shaft of the sliding drive motor 1; and a gear 9, which is driven to rotate by the output shaft of the first reducer 8 and meshes with the gear rail 6, the sliding drive motor 1 driving the gear 9 to rotate so that the gear 9 moves along the length direction of the gear rail 6, thereby driving the sliding seat 7 to slide along the gear rail 6, thereby driving the drill rod 4 to feed or retract.

[0039] Please see Figure 1 The first braking device 2 is located between the sliding drive motor 1 and the first reducer 8. In this embodiment, the first braking device 2 is a first hollow shaft magnetic powder brake. The output shaft of the sliding drive motor 1 passes through the hollow shaft of the first braking device 2 and is connected to the input shaft of the first reducer 8 by a key. The output shaft of the sliding drive motor 1 is also connected to the hollow shaft of the first braking device 2 by a key. The housing of the first braking device 2 is fixed to the sliding seat 7. At the same time, the first braking device 2 and the sliding drive motor 1 are electrically connected by wires. When the sliding drive motor 1 is driving the drill rod 4 to move normally, the first braking device 2 does not work. Once the sliding drive motor 1 is pulled by the drill rod 4 to reverse and generate electricity, the first braking device 2 is energized to apply reverse torque to the input shaft of the first reducer 8 and the output shaft of the sliding drive motor 1, thereby reducing the output shaft speed of the first reducer 8. This prevents the force applied by the drill rod 4 to the first reducer 8 from causing the first reducer 8 to reverse too quickly and exceed the speed limit of the first reducer 8, thus protecting the first reducer 8.

[0040] Please see Figure 1The rotary drive motor 3 and the second braking device 5 are both mounted on the sliding seat 7 by screws. The second reducer 11 is also mounted on the sliding seat 7 by screws. The second braking device 5 is located between the rotary drive motor 3 and the second reducer 11. In this embodiment, the second braking device 5 is set as a second hollow shaft magnetic powder brake. The rotary drive motor 3 passes through the hollow shaft of the second braking device 5 and is keyed to the hollow shaft. The output shaft of the rotary drive motor 3 is keyed to the input shaft of the second reducer 11 after passing through the hollow shaft. The output shaft of the second reducer 11 is keyed to the drill rod 4.

[0041] The second braking device 5 is electrically connected to the rotary drive motor 3 via a wire. When the output shaft of the rotary drive motor 3 is driven to rotate by the drill rod 4, the second braking device 5 is energized. The second braking device 5 outputs torque to the input shaft of the second reducer 11 to reduce the speed of the input shaft of the second reducer 11, thereby reducing the speed of the output shaft of the second reducer 11. This prevents the force applied by the drill rod 4 to the second reducer 11 from causing the second reducer 11 to reverse too quickly and exceed the speed limit of the second reducer 11, thus damaging the second reducer 11 and providing a certain degree of protection for the second reducer 11.

[0042] Before removing the drill pipe 4, the present invention requires that the sliding drive motor 1 and the rotary drive motor 3 be stopped. At the instant the sliding drive motor 1 and the rotary drive motor 3 stop, the elastic potential energy accumulated in the drill pipe is released, causing the sliding drive motor 1 and the rotary drive motor 3 to reverse. When the sliding drive motor 1 reverses, it generates electricity. After being energized, the first braking device 2 applies a force to the output shaft of the sliding drive motor 1 to restrict its rotation, and the greater the amount of electricity, the greater this force. Therefore, when the drill pipe 4 is pulled to reverse the sliding drive motor 1, the first braking device 2 will quickly reverse. The reverse torque applied to the output shaft of the sliding drive motor 1 quickly hinders the rebound of the drill rod 4, thus providing a certain degree of protection for the equipment. As the elastic potential energy of the drill rod 4 is released, the force that pulls the sliding drive motor 1 to reverse will decrease, and the power generation of the sliding drive motor 1 will also decrease. The torque applied by the first braking device 2 to the sliding drive motor 1 will also decrease accordingly, thereby gradually stopping the drill rod 4 and slowly releasing its elastic potential energy. The working principle of the second braking device 5 is the same as that of the first braking device 2. Example 2

[0043] The difference between this embodiment and embodiment 1 is that the first braking device 2 is set as a single-axis magnetic powder brake. The braking shaft of the first braking device 2 is directly connected to the gear 9 of the translation conversion mechanism. After the first braking device 2 is energized, it directly outputs torque to the gear 9 and reduces the speed of the gear 9. In turn, it reduces the speed of the output shaft of the first reducer 8 through linkage and plays a certain protective role for the first reducer 8. Example 3

[0044] The difference between this embodiment and embodiment 1 is that the second braking device 5 is set as a single-axis magnetic powder brake. The output shaft of the rotary drive motor 3 is keyed to the input shaft of the second reducer 11. The output shaft of the second reducer 11 is connected to the drill rod 4 through a gearbox. The brake shaft of the second braking device 5 is connected to the gearbox and is connected to the drill rod 4 through the gearbox. When the second braking device 5 is energized, it slows down the speed of the gearbox, thereby reducing the output shaft speed of the second reducer 11 and protecting the second reducer 11. Example 4

[0045] The difference between this embodiment and embodiment 1 is that the first braking device 2 is set as a first electromagnetic brake, the output shaft of the sliding drive motor 1 passes through the rotor of the first electromagnetic brake and is connected to the rotor of the first electromagnetic brake in a transmission manner, and at the same time the output shaft of the sliding drive motor 1 is connected to the input shaft of the first reducer 8 in a transmission manner. After the first electromagnetic brake is energized, it restricts the rotation of the rotor, thereby reducing the rotation speed of the output shaft of the sliding drive motor 1 and protecting the equipment. Example 5

[0046] The difference between this embodiment and embodiment 1 is that the second braking device 5 is configured as a second electromagnetic brake. The output shaft of the rotary drive motor 3 passes through the rotor of the second electromagnetic brake and is connected to the rotor of the second electromagnetic brake. At the same time, the output shaft of the rotary drive motor 3 is connected to the input shaft of the second reducer 11. After the second electromagnetic brake is energized, it restricts the rotation of the rotor, thereby reducing the speed of the output shaft of the rotary drive motor 3 and protecting the equipment.

[0047] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. All equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this invention should still be covered by the claims of this invention.

Claims

1. A spring-loaded directional drilling system, characterized in that, include: Sliding drive motor (1); The translation conversion mechanism is used to convert the torque output by the sliding drive motor (1) into a force that drives the drill rod (4) to move axially. The first braking device (2) is electrically connected to the sliding drive motor (1) and is used to power the sliding drive motor (1) when it is reversed by the drill rod (4) to generate electricity and apply reverse torque to the output shaft of the sliding drive motor (1) to reduce the speed of the output shaft of the sliding drive motor (1). A rotary drive motor (3) for driving the drill rod (4) to rotate; and, The second braking device (5) is electrically connected to the rotary drive motor (3) and is used to power the rotary drive motor (3) when it is reversed by the drill rod (4) to generate electricity, and to apply a reverse torque to the output shaft of the rotary drive motor (3) to reduce the speed of the output shaft of the rotary drive motor (3). The translation conversion mechanism includes: a toothed rail (6); a sliding seat (7) mounted on the toothed rail (6), the sliding seat (7) being able to slide back and forth along the toothed rail (6), and a drill rod (4) being mounted on the sliding seat (7); a first reducer (8) mounted on the sliding seat (7), the input shaft of which is driven to rotate by the output shaft of the sliding drive motor (1); and a gear (9), which is driven to rotate by the output shaft of the first reducer (8) and meshes with the toothed rail (6); The first braking device (2) is configured as a first hollow shaft magnetic powder brake. The output shaft of the sliding drive motor (1) passes through the hollow shaft of the first braking device (2) and is keyed to the hollow shaft of the first braking device (2). At the same time, the output shaft of the sliding drive motor (1) is connected to the input shaft of the first reducer. The rotary drive motor (3) is connected to the drill rod (4) through the second reducer (11). The output shaft of the rotary drive motor (3) drives the input shaft of the second reducer (11) to rotate, and the output shaft of the second reducer (11) drives the drill rod (4) to rotate. The second braking device (5) is configured as a second hollow shaft magnetic powder brake. The output shaft of the rotary drive motor (3) passes through the hollow shaft of the second hollow shaft magnetic powder brake and is keyed to the hollow shaft. At the same time, the output shaft of the rotary drive motor (3) is connected to the input shaft of the second reducer (11). When the sliding drive motor (1) reverses, the sliding drive motor (1) generates electricity. The first braking device (2) applies a force to the output shaft of the sliding drive motor (1) to restrict its rotation when it is energized, and the greater the amount of electricity, the greater the force. The working principle of the second braking device (5) is the same as that of the first braking device (2).

2. The spring-loaded directional drilling system according to claim 1, characterized in that, The first braking device (2) is configured as a first magnetic powder brake, and the output shaft of the first magnetic powder brake is circumferentially fixed to the gear (9).

3. The spring-loaded directional drilling system according to claim 1, characterized in that, The first braking device (2) is configured as a first electromagnetic brake. The output shaft of the sliding drive motor (1) passes through the rotor of the first electromagnetic brake and is connected to the rotor of the first electromagnetic brake. At the same time, the output shaft of the sliding drive motor (1) is connected to the input shaft of the first reducer (8).

4. The spring-loaded directional drilling system according to claim 1, characterized in that, The second braking device (5) is configured as a second magnetic powder brake, and the output shaft of the second magnetic powder brake is connected to the drill rod (4) for transmission.

5. The spring-loaded directional drilling system according to claim 1, characterized in that, The second braking device (5) is configured as a second electromagnetic brake. The output shaft of the rotary drive motor (3) passes through the rotor of the second electromagnetic brake and is connected to the rotor of the second electromagnetic brake. At the same time, the output shaft of the rotary drive motor (3) is connected to the input shaft of the second reducer (11).

6. A type of slow-release directional drilling device, characterized in that, It includes the spring-loaded directional drilling system as described in any one of claims 1-5.

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