Ground horizontal well fracturing drilling device and drilling method

Abstract

The invention relates to the technical field of coal mine drilling, in particular to a ground horizontal well fracturing drilling device and a drilling method.The ground horizontal well fracturing drilling device comprises a bearing vehicle body, and a drilling rod capable of moving in the vertical direction is arranged on the bearing vehicle body; the power assembly is arranged on the bearing vehicle body and connected with the drill rod, the power assembly comprises a rotating structure and a lifting structure, and the rotating structure is matched with the lifting assembly and can drive the drill rod to execute the precession action; the speed regulating assembly is connected with the drill rod and the lifting structure, a plurality of arc-shaped pieces are arranged on the speed regulating assembly and form a diameter-variable belt pulley, and the belt pulley is connected with the drill rod; the centrifugal assembly is connected with the drill rod, and the centrifugal assembly is connected with a gear control switch arranged on the bearing vehicle body; and the pump liquid assembly is arranged on the bearing vehicle body and communicates with the drill rod, the speed adjusting assembly is matched with the gear control switch, the flow of fluid pumped by the pump liquid assembly towards the drill rod can be controlled, and the drill bit is prevented from being damaged.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine drilling, in particular to a ground horizontal well fracturing drilling device and a drilling method. Background Art

[0002] Surface horizontal well fracturing technology is mainly used in the mining field. When the basic top thickness of the coal mining face is large and the rock is relatively hard, the dynamic load intensity generated by periodic fracture during the mining process of the face is large. The combined superposition of the high static load stress in the surrounding rock of the mining space is the essential reason for the serious deformation and damage of the surrounding rock of the return air roadway. Therefore, this basic top layer is often used as the target layer for surface horizontal well fracturing.

[0003] In the actual operation process, it is necessary to first drill vertically at the predetermined position on the ground, and after the borehole is adjusted in direction through the variable inclination section and turned to horizontal drilling, it is horizontally drilled to a reasonable depth of the target layer in the overlying rock formation of the coal mining working face, and then water injection and fracturing measures are taken in the horizontal section of the borehole, which is commonly known as ground horizontal well fracturing technology. Considering that when the traditional borehole is drilled in the formation, water needs to be supplied while the drill rod is screwed in. The amount of water here is mainly used to lubricate and cool the end of the drill rod, and the screwing speed of the drill rod needs to match the water supply to prevent the end of the drill rod from being damaged by high temperature. It should be emphasized here that the water supply during the screwing process of the drill rod is mainly controlled by human subjectivity, but for the rock formations of different lithology in the overlying rock of the coal mining working face, the screwing speed of the drill rod is different, which causes the water supply of the drill rod to change during the drilling of the rock formations of different lithology. It can be seen that the water supply needs to be regulated in real time during the drilling process of the drill rod in rock formations of different lithologies. That is, when the rock hardness of the rock formation changes, not only the rotation speed of the drill rod needs to be adjusted, but also the water supply speed needs to be adjusted. This makes the operation more difficult and easily causes a mismatch between the rotation speed of the drill rod and the water supply. In severe cases, it may even cause damage to the end of the drill rod. Summary of the invention

[0004] The object of the present invention is to provide a ground horizontal well fracturing drilling device and a drilling method to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A ground horizontal well fracturing drilling device, comprising: A load-bearing vehicle body, on which a drill rod capable of moving in a vertical direction is disposed; A power assembly is arranged on the carrier body and connected to the drill rod, the power assembly includes a rotating structure and a lifting structure, the rotating structure cooperates with the lifting assembly to drive the drill rod to perform a screwing action; A speed regulating assembly is connected to the drill rod and the lifting structure. The speed regulating assembly is provided with a plurality of groups of arc-shaped members, and the plurality of groups of arc-shaped members form a pulley with a variable diameter. The pulley is connected to the drill rod; A centrifugal assembly connected to the drill rod, wherein the centrifugal assembly is connected to a gear control switch disposed on the carrier body; The pump fluid assembly is arranged on the carrier body and is connected to the drill rod. The speed regulating assembly cooperates with the gear control switch to control the flow rate of the pump fluid assembly pumping fluid toward the drill rod.

[0006] As a further solution of the present invention: the carrying vehicle body is provided with a support arm, the support arm is provided with a lifting frame that can slide along the length direction thereof, and the lifting frame is connected to the lifting structure; The rotating structure comprises a driving motor mounted on the lifting frame, the output shaft of the driving motor is connected with a connecting pipe rotatably mounted on the lifting frame, and the connecting pipe is detachably connected to the drill rod.

[0007] As a further solution of the present invention: the lifting structure includes a screw rod rotatably mounted on the support arm and a threaded sleeve connected to the lifting frame, and the threaded sleeve is threadedly connected to the screw rod.

[0008] As a further solution of the present invention: the speed regulating assembly comprises a bracket connected to the support arm, a connecting sleeve is installed on the bracket, a plurality of guide members are equidistantly arranged on the connecting sleeve at a circumference, a telescopic member is slidably installed on the guide member, an end of the telescopic member away from the connecting sleeve is connected to the arc member, and a plurality of groups of the arc members are connected to a follower sleeve arranged on the support arm through a third belt, a limiting block is arranged on the inner wall of the follower sleeve, and the limiting block is slidably connected to a limiting groove arranged on the drill rod; The connecting sleeve is connected to the bracket via an elastic structure, and the connecting sleeve is connected to the screw rod via a first belt; The speed regulating assembly also includes a supporting structure connected to the connecting sleeve and the telescopic member, and the supporting structure can adjust the radius of the pulley.

[0009] As a further solution of the present invention: the elastic structure comprises a slide groove arranged on the bracket, a slider is slidably installed in the slide groove, and the slider is rotatably connected to the connecting sleeve; A first cylindrical spring is connected to one side of the sliding block, and one end of the first cylindrical spring away from the sliding block is connected to the inner wall of the sliding groove.

[0010] As a further solution of the present invention: the supporting structure includes an electric telescopic rod coaxially connected to the connecting sleeve, and multiple groups of supporting rods are rotatably installed on the action end of the electric telescopic rod, and one end of the support rod away from the electric telescopic rod is rotatably connected to the telescopic member.

[0011] As a further solution of the present invention: the centrifugal assembly includes a follower shaft rotatably mounted on the support arm, the follower shaft is connected to the follower sleeve via a second belt, a rotating member is further provided on the follower shaft, a retardation groove is provided on the rotating member, a transverse member is slidably mounted in the retardation groove, and a hinged rod is rotatably mounted on the transverse member; A lifting sleeve slidably sleeved on the follower shaft is rotatably connected to the hinge rod, and a collar connected to the gear control switch is slidably sleeved with an annular groove formed on the lifting sleeve; A second cylindrical spring is also sleeved on the follower shaft, one end of the second cylindrical spring is connected to the rotating member, and the other end of the second cylindrical spring is connected to the lifting sleeve.

[0012] As a further solution of the present invention: the pump assembly includes a pump device mounted on the carrier body, the output port of the pump device is provided with an annular connecting seat, and the annular connecting seat is sealingly and rotatably connected to the connecting pipe; The pump fluid assembly also includes communication grooves equidistantly arranged on the connecting pipe at a circumference, and the fluid can enter the interior of the drill rod through the annular connecting seat and the communication grooves.

[0013] A drilling method for fracturing a ground horizontal well using the drilling device comprises the following steps: Step 1: Start the rotating structure to drive the drill rod to rotate. At the same time, the rotating structure drives the lifting structure to move through the speed regulating component, so that the drill rod can be rotated downward; Step 2: Control the action of the speed regulating assembly to change the action ratio of the rotating structure and the lifting assembly, so that the lifting speed of the drill rod is changed while the rotation speed of the drill rod is constant; Step 3: When the drill pipe rotates, the centrifugal assembly can drive the gear control switch to operate; Step 4: The gear control switch and the speed regulating assembly jointly control the action of the pump fluid assembly so that the amount of fluid pumped into the drill pipe matches the screw speed of the drill pipe.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention can be applied to the mining field. By setting the electric telescopic rod and the centrifugal assembly, the gear control switch and the movement amount of the electric telescopic rod can jointly control the power of the pumping device. When the drill rod rotates at a high speed and the descending speed is high, the pumping device can have a larger delivery power, and vice versa. That is, the drill rod rotates at a high speed and the descending speed can control the power of the pumping device in a linked manner, thereby improving the adaptability of the pumping power of the pumping device. By setting up a speed regulating component, the multiple arc-shaped parts can be moved closer to or away from each other by controlling the movement of the electric telescopic rod. At this time, the radius of the pulleys of the multiple arc-shaped parts is increased or decreased, thereby achieving the effect of adjusting the rotation speed between the drill rod and the screw rod, so that the descent speed of the drill rod can match the rock hardness of the rock formation, avoiding damage to the drill bit at the end of the drill rod while increasing the drilling speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a structural schematic diagram of an embodiment of a ground horizontal well fracturing drilling device and a drilling method.

[0016] Figure 2 This is a schematic structural diagram from another angle of an embodiment of a ground horizontal well fracturing drilling device and a drilling method.

[0017] Figure 3 The present invention is a schematic diagram of the partial structure of a power component in one embodiment of a ground horizontal well fracturing drilling device and a drilling method.

[0018] Figure 4 The present invention is a schematic structural diagram of a speed regulating assembly in one embodiment of a ground horizontal well fracturing drilling device and a drilling method.

[0019] Figure 5 This is a schematic structural diagram from another angle of a speed regulating assembly in one embodiment of a ground horizontal well fracturing drilling device and a drilling method.

[0020] Figure 6 The present invention is a schematic structural diagram of an arc-shaped member and a supporting structure in one embodiment of a ground horizontal well fracturing drilling device and a drilling method.

[0021] Figure 7 The present invention is a schematic structural diagram of a centrifugal assembly in one embodiment of a ground horizontal well fracturing drilling device and a drilling method.

[0022] In the figure: 1, bearing body; 2, support arm; 3, driving motor; 301, connecting pipe; 302, connecting groove; 4, drill rod; 401, limiting groove; 5, lifting frame; 6, annular connecting seat; 7, follower sleeve; 701, limiting block; 8, first belt; 9, connecting sleeve; 10, guide member; 11, telescopic member; 12, support rod; 13, electric telescopic rod; 14, screw rod; 15, threaded sleeve; 16, bracket; 1601, slide groove; 17, slider; 18, first cylindrical spring; 19, second belt; 20, follower shaft; 21, rotating member; 2101, retardation groove; 22, transverse member; 23, hinged rod; 24, lifting sleeve; 2401, annular groove; 25, second cylindrical spring; 26, collar; 27, gear control switch; 28, arc member; 29, third belt; 30, pumping device. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0025] See also Figure 1 to Figure 7 In an embodiment of the present invention, a ground horizontal well fracturing drilling device includes: a carrier body 1, a power assembly, a speed regulating assembly, a centrifugal assembly and a pump assembly, so that the gear control switch 27 and the action amount of the electric telescopic rod 13 can jointly control the power of the pump device 30, and when the rotation speed of the drill rod 4 is large and the descending speed is large, the pump device 30 can have a larger delivery power, and vice versa, that is, the rotation speed and the descending speed of the drill rod 4 can control the power of the pump device 30 in a linked manner, thereby improving the adaptability of the pumping power of the pump device 30, as follows: The carrier body 1 is provided with a drill rod 4 which can move in a vertical direction; The power assembly is arranged on the carrier body 1 and connected to the drill rod 4. The power assembly includes a rotating structure and a lifting structure. The rotating structure cooperates with the lifting assembly to drive the drill rod 4 to perform a screwing action. The rotating structure includes a driving motor 3 installed on the lifting frame 5. The output shaft of the driving motor 3 is connected to a connecting pipe 301 rotatably installed on the lifting frame 5. The connecting pipe 301 is detachably connected to the drill rod 4. The support vehicle body 1 is provided with a support arm 2, and the support arm 2 is provided with a lifting frame 5 that can slide along its length direction, and the lifting frame 5 is connected to the lifting structure; The lifting structure includes a screw rod 14 rotatably mounted on the support arm 2 and a threaded sleeve 15 connected to the lifting frame 5 , and the threaded sleeve 15 is threadedly connected to the screw rod 14 .

[0026] When in use, the drive motor 3 is controlled to work. At this time, the output shaft of the drive motor 3 drives the connecting pipe 301 to rotate, thereby rotating the drill rod 4 coaxial with the connecting pipe 301. At the same time, under the connection of the speed regulating component, the screw rod 14 will also rotate with the drill rod 4. At this time, the threaded sleeve 15 that cooperates with the thread of the screw rod 14 can move along the length direction of the screw rod 14, so that the drill rod 4 can move toward the ground during the rotation process. The combination of the two movements enables the drill rod 4 to perform a screwing action, that is, the drill rod 4 can have two motion states through one driving source, thereby improving the degree of integration of the device.

[0027] In the prior art, the rotation and lifting of the drill rod 4 are controlled by two sets of driving sources, which makes the structure of the traditional drilling device too complicated due to the presence of multiple driving sources, thereby increasing the production, use and maintenance costs of the drilling device.

[0028] See also Figure 4~Figure 6 The speed regulating assembly is connected to the drill rod 4 and the lifting structure. A plurality of arc-shaped members 28 are arranged on the speed regulating assembly. The plurality of arc-shaped members 28 form a pulley with a variable diameter. The pulley is connected to the drill rod 4. The speed regulating assembly includes a bracket 16 connected to the support arm 2, a connecting sleeve 9 is installed on the bracket 16, a plurality of guide members 10 are equidistantly arranged on the connecting sleeve 9 in a circumferential manner, a telescopic member 11 is slidably installed on the guide member 10, an end of the telescopic member 11 away from the connecting sleeve 9 is connected to the arc member 28, and a plurality of groups of the arc members 28 are connected to the follower sleeve 7 arranged on the support arm 2 through a third belt 29, a limiting block 701 is arranged on the inner wall of the follower sleeve 7, and the limiting block 701 is slidably connected to the limiting groove 401 arranged on the drill rod 4; The connecting sleeve 9 is connected to the bracket 16 through an elastic structure, and the connecting sleeve 9 is connected to the screw rod 14 through a first belt 8. The elastic structure includes a slide groove 1601 provided on the bracket 16, and a slider 17 is slidably installed in the slide groove 1601. The slider 17 is rotatably connected to the connecting sleeve 9; A first cylindrical spring 18 is connected to one side of the slider 17, and an end of the first cylindrical spring 18 away from the slider 17 is connected to the inner wall of the slide slot 1601; The speed regulating assembly also includes a supporting structure connecting the connecting sleeve 9 and the telescopic member 11, and the supporting structure can adjust the radius of the pulley. The supporting structure includes an electric telescopic rod 13 coaxially connected to the connecting sleeve 9, and multiple groups of support rods 12 are rotatably installed on the action end of the electric telescopic rod 13. The end of the support rod 12 away from the electric telescopic rod 13 is rotatably connected to the telescopic member 11.

[0029] During use, when the drill rod 4 rotates, the limit groove 401 and the limit block 701 can drive the follower sleeve 7 to rotate, and the follower sleeve 7 drives the pulley formed by multiple arc-shaped parts 28 to rotate through the third belt 29. At the same time, the pulley drives the connecting sleeve 9 to rotate, so as to drive the screw 14 to rotate through the first belt 8, so that when the drill rod 4 rotates, the drill rod 4 can perform a lifting action.

[0030] In the actual coal mine operation environment, the screwing speed of the drill rod 4 needs to match the rock properties of the current rock formation. Specifically, when the rotation speed of the drill rod 4 is the same, if the rock under the operation condition is relatively hard, the drill rod 4 needs to move toward the rock at a slower speed to avoid damage to the drill bit at the end of the drill rod 4. If the rock under the operation condition is relatively soft, the drill rod 4 can be moved toward the rock at a faster speed to increase the drilling speed. In the embodiment: By controlling the movement of the electric telescopic rod 13, the end of the electric telescopic rod 13 can drive the telescopic member 11 to move through the support rod 12, thereby causing the multiple groups of arc-shaped members 28 to move closer to or away from each other, so that the radius of the pulley formed by the multiple groups of arc-shaped members 28 changes. At this time, the speed ratio between the drill rod 4 and the connecting sleeve 9 can be changed, thereby causing the speed ratio between the screw rod 14 and the drill rod 4 to change. When the speed of the drill rod 4 is constant, the speed of the screw rod 14 can be changed according to the actual situation of the rock, so that the descending speed of the drill rod 4 can match the hardness of the rock, thereby avoiding damage to the drill bit at the end of the drill rod 4 and increasing the drilling speed.

[0031] It is worth noting that the length of the third belt 29 is constant, and the first cylindrical spring 18 can keep the third belt 29 in a taut state, and when the radius of the pulley formed by the multiple arc-shaped parts 28 changes, the first cylindrical spring 18 can also be compressed or released to keep the third belt 29 in a taut state, thereby preventing the third belt 29 from being too loose and causing slippage between the pulley formed by the multiple arc-shaped parts 28 and the third belt 29, and preventing the third belt 29 from being broken.

[0032] Through the above arrangement, by controlling the movement of the electric telescopic rod 13, the multiple arc-shaped members 28 can be moved closer to or away from each other. At this time, the radius of the pulleys of the multiple arc-shaped members 28 is increased or decreased, thereby achieving the effect of adjusting the rotation speed between the drill rod 4 and the screw rod 14, so that the descending speed of the drill rod 4 can match the hardness of the rock, avoiding damage to the drill bit at the end of the drill rod 4 while increasing the drilling speed.

[0033] See also Figure 4 , Figure 7 , the centrifugal assembly is connected to the drill rod 4, the centrifugal assembly is connected to the gear control switch 27 arranged on the carrier body 1, the centrifugal assembly includes a follower shaft 20 rotatably mounted on the support arm 2, the follower shaft 20 is connected to the follower sleeve 7 through a second belt 19, and a rotating member 21 is also arranged on the follower shaft 20, and a retardation groove 2101 is arranged on the rotating member 21, a transverse member 22 is slidably mounted in the retardation groove 2101, and a hinged rod 23 is rotatably mounted on the transverse member 22; The lifting sleeve 24 slidably sleeved on the follower shaft 20 is rotatably connected to the hinge rod 23, and the collar 26 connected to the gear control switch 27 is slidably sleeved with the annular groove 2401 formed on the lifting sleeve 24; The follower shaft 20 is also sleeved with a second cylindrical spring 25 , one end of the second cylindrical spring 25 is connected to the rotating member 21 , and the other end of the second cylindrical spring 25 is connected to the lifting sleeve 24 .

[0034] In use, when the drill rod 4 rotates, the follower shaft 20 can be driven to rotate through the second belt 19. At this time, the rotating member 21 connected to the follower shaft 20 can make a circular motion, and at the same time, the transverse member 22 can make a circular motion. At this time, the transverse member 22 can generate centrifugal force, so that the transverse member 22 can move along the length direction of the retardation groove 2101 under the action of centrifugal force, and pull the lifting sleeve 24 through the hinge rod 23 to move upward along the length direction of the follower shaft 20. At this time, the ring 26 will also move upward and increase the gear value of the gear control switch 27. At this time, the gear control switch 27 can control the power of the pumping device 30 to increase, thereby pumping more fluid into the drill rod 4, so that the drill bit at the end of the drill rod 4 can be fully cooled and lubricated, and at the same time, it also avoids the waste caused by excessive fluid pumping when the rotation speed of the drill rod 4 is low.

[0035] Through the above-mentioned arrangement, the rotation speed of the drill rod 4 can be matched with the power of the pumping device 30 in real time, thereby, on the one hand, avoiding the drill bit at the end of the drill rod 4 being damaged due to high temperature due to the excessive rotation speed of the drill rod 4 and the insufficient fluid pumping volume, and on the other hand, avoiding the waste caused by the excessive fluid pumping volume when the rotation speed of the drill rod 4 is low.

[0036] See also Figure 3 The pump assembly is arranged on the carrier body 1 and is connected to the drill rod 4. The speed regulating assembly cooperates with the gear control switch 27 to control the flow rate of the pump assembly pumping fluid toward the drill rod 4. The pump assembly comprises a pump device 30 mounted on the carrier body 1, the output port of the pump device 30 is provided with an annular connection seat 6, and the annular connection seat 6 is sealingly and rotatably connected with the connection pipe 301; The pump fluid assembly further includes communication grooves 302 equidistantly arranged on the connecting pipe 301 circumferentially, and the fluid can enter the interior of the drill rod 4 through the annular connecting seat 6 and the communication grooves 302 .

[0037] It is worth noting that the gear control switch 27 and the movement of the electric telescopic rod 13 can jointly control the power of the pumping device 30, so that when the rotation speed of the drill rod 4 is higher and the descent speed is higher, the pumping device 30 can have a greater delivery power, otherwise it will be smaller. That is, the rotation speed and the descent speed of the drill rod 4 can control the power of the pumping device 30 in a linkage manner, thereby improving the adaptability of the pumping power of the pumping device 30.

[0038] It should be supplemented that a drill bit is integrated at the lower end of the drill rod 4 , and the interior of the drill rod 4 is a hollow tube structure, and a water outlet is provided at one end of the drill bit away from the drill rod 4 .

[0039] As an embodiment of the present invention, a drilling method for fracturing a ground horizontal well using the drilling device is also proposed, comprising the following steps: Step 1: Start the rotating structure to drive the drill rod 4 to rotate. At the same time, the rotating structure drives the lifting structure to move through the speed regulating component, so that the drill rod 4 can be rotated downward; Step 2: Control the speed regulating assembly to change the action ratio of the rotating structure and the lifting assembly, so that the lifting speed of the drill rod 4 is changed while the rotation speed of the drill rod 4 is constant; Step 3: When the drill rod 4 rotates, the centrifugal assembly can drive the gear control switch 27 to operate; Step 4: The gear control switch 27 and the speed regulating assembly jointly control the action of the pumping assembly so that the amount of fluid pumped into the drill rod 4 matches the screwing speed of the drill rod 4 .

[0040] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0041] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A ground horizontal well fracturing drilling device, characterized in that: include: A load-bearing vehicle body (1), wherein a drill rod (4) capable of moving in a vertical direction is arranged on the load-bearing vehicle body (1); a power assembly, arranged on the carrier body (1) and connected to the drill rod (4), the power assembly comprising a rotating structure and a lifting structure, the rotating structure cooperating with the lifting assembly to drive the drill rod (4) to perform a screwing action; A speed regulating assembly connected to the drill rod (4) and the lifting structure, wherein the speed regulating assembly is provided with a plurality of groups of arc-shaped members (28), wherein the plurality of groups of arc-shaped members (28) form a belt pulley with a variable diameter, and wherein the belt pulley is connected to the drill rod (4); A centrifugal assembly connected to the drill rod (4), the centrifugal assembly being connected to a gear control switch (27) provided on the carrier body (1); A pump assembly is arranged on the carrier body (1) and is connected to the drill rod (4); the speed regulating assembly cooperates with the gear control switch (27) to control the flow rate of the fluid pumped by the pump assembly toward the drill rod (4).

2. A ground horizontal well fracturing drilling device according to claim 1, characterized in that: The support vehicle body (1) is provided with a support arm (2), the support arm (2) is provided with a lifting frame (5) capable of sliding along its length direction, and the lifting frame (5) is connected to the lifting structure; The rotating structure comprises a driving motor (3) mounted on the lifting frame (5); the output shaft of the driving motor (3) is connected to a connecting pipe (301) rotatably mounted on the lifting frame (5); the connecting pipe (301) is detachably connected to the drill rod (4).

3. A ground horizontal well fracturing drilling device according to claim 2, characterized in that: The lifting structure comprises a screw rod (14) rotatably mounted on the support arm (2) and a threaded sleeve (15) connected to the lifting frame (5), wherein the threaded sleeve (15) is threadedly connected to the screw rod (14).

4. A ground horizontal well fracturing drilling device according to claim 3, characterized in that: The speed regulating assembly comprises a bracket (16) connected to the support arm (2), a connecting sleeve (9) being mounted on the bracket (16), a plurality of groups of guide members (10) being equidistantly arranged on the connecting sleeve (9) in a circumferential manner, a telescopic member (11) being slidably mounted on the guide member (10), an end of the telescopic member (11) away from the connecting sleeve (9) being connected to the arc member (28), and a plurality of groups of the arc members (28) being connected to a follower sleeve (7) arranged on the support arm (2) via a third belt (29), a limit block (701) being arranged on the inner wall of the follower sleeve (7), and the limit block (701) being slidably connected to a limit groove (401) arranged on the drill rod (4); The connecting sleeve (9) is connected to the bracket (16) via an elastic structure, and the connecting sleeve (9) is connected to the screw rod (14) via a first belt (8); The speed regulating assembly further comprises a supporting structure connecting the connecting sleeve (9) and the telescopic member (11), wherein the supporting structure is capable of adjusting the radius of the pulley.

5. A ground horizontal well fracturing drilling device according to claim 4, characterized in that: The elastic structure comprises a slide groove (1601) arranged on the bracket (16), a slider (17) being slidably mounted in the slide groove (1601), and the slider (17) being rotationally connected to the connecting sleeve (9); A first cylindrical spring (18) is connected to one side of the sliding block (17), and an end of the first cylindrical spring (18) away from the sliding block (17) is connected to the inner wall of the sliding groove (1601).

6. A ground horizontal well fracturing drilling device according to claim 4, characterized in that: The support structure comprises an electric telescopic rod (13) coaxially connected to the connecting sleeve (9); a plurality of groups of support rods (12) are rotatably mounted on an action end of the electric telescopic rod (13); and one end of the support rod (12) away from the electric telescopic rod (13) is rotatably connected to the telescopic member (11).

7. A ground horizontal well fracturing drilling device according to claim 4, characterized in that: The centrifugal assembly comprises a follower shaft (20) rotatably mounted on the support arm (2), the follower shaft (20) being connected to the follower sleeve (7) via a second belt (19), a rotating member (21) being further provided on the follower shaft (20), a retardation groove (2101) being provided on the rotating member (21), a transverse member (22) being slidably mounted in the retardation groove (2101), and a hinged rod (23) being rotatably mounted on the transverse member (22); A lifting sleeve (24) slidably sleeved on the follower shaft (20) is rotatably connected to the hinge rod (23), and a collar (26) connected to the gear control switch (27) is slidably sleeved with an annular groove (2401) formed on the lifting sleeve (24); A second cylindrical spring (25) is also sleeved on the follower shaft (20); one end of the second cylindrical spring (25) is connected to the rotating member (21), and the other end is connected to the lifting sleeve (24).

8. A ground horizontal well fracturing drilling device according to claim 2, characterized in that: The pump assembly comprises a pump device (30) mounted on the carrier body (1), the output port of the pump device (30) being provided with an annular connecting seat (6), the annular connecting seat (6) being sealingly rotatably connected to the connecting pipe (301); The pump fluid assembly further comprises communication grooves (302) arranged at equidistant intervals on the circumference of the connection pipe (301), and the fluid can enter the interior of the drill rod (4) through the annular connection seat (6) and the communication grooves (302).

9. A drilling method for fracturing a ground horizontal well using the drilling device according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: starting the rotating structure to drive the drill rod (4) to rotate, and at the same time the rotating structure drives the lifting structure to move through the speed regulating component, so that the drill rod (4) can be rotated downward; Step 2: Controlling the movement of the speed regulating assembly to change the movement ratio of the rotating structure and the lifting assembly, thereby changing the lifting speed of the drill rod (4) while keeping the rotation speed of the drill rod (4) constant; Step 3: When the drill rod (4) rotates, the centrifugal assembly can drive the gear control switch (27) to operate; Step 4: The gear control switch (27) and the speed regulating assembly jointly control the operation of the pump assembly so that the amount of fluid pumped into the drill rod (4) matches the rotation speed of the drill rod (4).

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