A drilling and slotting integrated device and method for hydraulic fracturing

Abstract

The application provides a drilling and slotting integrated device and method for hydraulic fracturing, relates to the technical field of coal mining, and is used for drilling or slotting under the action of a power mechanism and comprises a body, a drill bit, a cutting tool body and a driving piece. The body is provided with a cutting tool body storage part, and an opening part for the blade part of the cutting tool body to extend out of the body is arranged on the body at a position corresponding to the cutting tool body storage part; the drill bit is arranged on the body and is provided with a cutting end for drilling; the cutting tool body is arranged in the cutting tool body storage part and is provided with a blade part for slotting the side wall of the hole drilled by the drill bit; and the driving piece is connected with the cutting tool body to drive the cutting tool body to move so that the blade part of the cutting tool body extends out of the body from the opening part. The integrated device can complete the drilling process and the slotting process at one time without changing the original drilling process, is convenient to use, reliable in performance, and reduces the working intensity of the on-site construction personnel.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of coal mining, in particular to a drilling and slotting integrated device and method for hydraulic fracturing. BACKGROUND

[0002] China is rich in coal resources, and the coal seam occurrence conditions are complex. About 1 / 3 of the coal seams with hard and difficult-to-collapse roofs account for more than 50% of the mining areas. With the popularization of comprehensive mechanized coal mining technology, more than 40% of the fully-mechanized coal mining faces have hard and difficult-to-collapse roofs with strong pressure, especially the hard roof faces with thin direct roof. Since the directional hydraulic fracturing was tested and applied in the hard and difficult-to-collapse roof in 1983, a relatively complete technical equipment and process specification have been formed. With the popularization and application of the comprehensive mechanized coal mining technology in the hard and difficult-to-collapse roof face and the needs of the high-yield and high-efficiency of the mining enterprises, the softening and pressure relief of the hard roof is particularly urgent. The unexpected and uncontrollable collapse of the hard roof can cause great harm, damage the equipment and the roadway, and bring danger to the construction personnel. When the coal is mined in the coal seam with the tendency of rock burst and coal and gas outburst, the overhang of the roof increases the stress of the edge part of the coal seam, and even causes the gas dynamic phenomenon. In recent years, the directional hydraulic fracturing roof cutting and pressure relief technology of the hard and difficult-to-collapse roof has been applied in the mining area. The technology can realize the continuous and uniform softening and pressure relief of the hard roof, the directional and accurate cutting, the in-place roof cutting, the fast on-site implementation, the continuous and complete directional cracks, and the fully reliable roof cutting and pressure relief effect. The directional hydraulic fracturing roof first creates a guide crack in the roof by an artificial method, and then expands the crack by the hydraulic fracturing, so as to reduce the overall strength and impact of the roof.

[0003] According to the different formation modes of the guide cracks, the mechanical slotting and the hydraulic slotting can be divided into two forms. The mechanical slotting relies on the radial slotting of the cutting tool in the drilling, and the hydraulic slotting relies on the high-pressure water jet to form the guide crack. The mechanical slotting and the hydraulic slotting technology are widely used in the field. When the mechanical slotting is used, the drilling is first performed in the roof, the drilling is retreated after the construction is completed, and the cutting tool is replaced to cut the crack. The time for replacing the cutting tool by the drilling accounts for 60% of the total time according to the main process working hour determination of the hydraulic fracturing. Therefore, in order to improve the working efficiency, the corresponding structure of the construction device needs to be improved, the complicated operation of the on-site equipment is simplified, and the working strength of the construction personnel is reduced under the condition of meeting the use requirements of the drilling and slotting. SUMMARY

[0004] In order to solve the problems of complex drilling and slotting process and long time consumption in the existing coal mining process, the application provides a drilling and slotting integrated device and method for hydraulic fracturing, which can complete the drilling process and slotting process at one time without changing the original drilling process. The device is convenient to use, reliable in performance, and reduces the work intensity of the field construction personnel.

[0005] The technical scheme adopted by the application to solve the technical problems is: a drilling and slotting integrated device for hydraulic fracturing, which is used for drilling or slotting under the action of a power mechanism, and includes a body, a drill bit, a cutting tool body, and a driving member.

[0006] The body is provided with a cutting tool body storage part, and an opening part for the blade part of the cutting tool body to extend out of the body is arranged at a position on the body corresponding to the cutting tool body storage part.

[0007] The drill bit is arranged on the body, and a cutting end for drilling is arranged on the drill bit.

[0008] The cutting tool body is arranged in the cutting tool body storage part, and a blade part for slotting the side wall of the hole drilled by the drill bit is arranged on the cutting tool body.

[0009] The driving member is connected with the cutting tool body to drive the cutting tool body to move so that the blade part of the cutting tool body extends out of the body from the opening part.

[0010] In a specific embodiment, the drill bit further includes a mounting end; a first connecting part connecting the mounting end of the drill bit is arranged at the first end of the body; the driving member is arranged inside the body; and the cutting tool body storage part is located inside the body.

[0011] In a specific embodiment, a fluid inflow cavity is arranged at the second end of the body; a cutoff cavity is arranged in the drill bit; a first fluid passage is arranged on the body, a first end of the first fluid passage communicates with the fluid inflow cavity, and a second end of the first fluid passage communicates with the cutoff cavity in the drill bit; a cutoff member is arranged in the cutoff cavity, a sealing surface adapted to the cutoff member is formed between the inner wall of the cutoff cavity and the cutoff member, a through-flow hole is arranged on the drill bit, one end of the through-flow hole is open to the outside of the drill bit, and the other end of the through-flow hole is open to the sealing surface; and the integrated device further includes a control structure connected with the cutoff member.

[0012] In a specific embodiment, the body is tubular, a first wall body is arranged between the first connecting part and the cutting tool body storage part; and the first fluid passage is arranged in the wall of the body.

[0013] In a specific embodiment, the sealing structure comprises a first elastic member arranged in the shutoff cavity, the first elastic member is arranged between the shutoff member and the first wall body, and a guide hole is arranged through the drill bit exterior and the shutoff cavity.

[0014] In a specific embodiment, the driving member comprises a piston arranged in the body lumen; the piston is hingedly connected to one end of the cutting blade body, and the body lumen is provided with a matching sliding surface at the position of the other end of the cutting blade body.

[0015] In a specific embodiment, the inner wall of the body lumen is provided with a forward stop positioning structure on one side in the piston extension direction and a backward stop positioning structure on the other side in the piston retraction direction, and a second elastic member is arranged between the forward stop positioning structure and the piston.

[0016] In a specific embodiment, the piston is internally provided with a second fluid channel, the first end of the second fluid channel is in communication with the fluid inflow cavity, and the second end of the second fluid channel is in communication with the cutting blade body receiving portion; the piston is provided with a stepped cavity at the first end of the second fluid channel, the stepped cavity is sequentially provided with an adjusting member, a blocking body and a third elastic member in the piston extension direction, the adjusting member is provided with a through hole, and the blocking body is in abutment with the through hole of the adjusting member and has a shape matching the abutment part.

[0017] In a specific embodiment, when the sealing structure presses the shutoff seat against the sealing surface on the inner wall of the shutoff cavity, the guide rod protrudes from the cutting end of the drill bit.

[0018] In a specific embodiment, the drill hole slitting method comprises:

[0019] During drilling, the drill bit abuts against the to-be-drilled part, the shutoff member is retracted to open the through-flow hole, the fluid is cooled and flushed to the drill bit by the power mechanism through the first fluid channel and the through-flow hole, and the drill bit performs drilling work under the action of the power mechanism;

[0020] During slitting, the drill bit is set to a predetermined depth, the shutoff member blocks the through-flow hole under the action of the first elastic member, the fluid pressure from the power mechanism is increased and drives the cutting blade body to move along the sliding surface, the blade part of the cutting blade body extends out of the opening part and abuts against the to-be-cut part, the fluid pressure from the power mechanism is increased and the second fluid channel is opened, the fluid is cooled and flushed to the cutting blade body by the power mechanism through the second fluid channel and the opening part, and the cutting blade body performs cutting work under the action of the power mechanism.

[0021] After the slotting construction is completed, the fluid pressure of the power mechanism is closed, and the cutting tool body moves to the storage part along the sliding surface under the action of the second elastic member.

[0022] The advantages of the present application are that the drilling and slotting integrated device for hydraulic fracturing integrally arranges the drill bit for realizing the drilling function and the cutting tool body for realizing the slotting function, can complete the drilling process and the slotting process at one time without changing the original drilling process, simplifies the cumbersome operation of the on-site equipment, and reduces the operation intensity of the construction personnel. The cutting tool body storage part can accommodate the cutting tool body, so that the related components of the slotting operation do not affect the drilling operation, the blade part of the cutting tool body is pushed out of the opening part by the driving member under the action of the force to perform the slotting operation, and the functional level of the device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a drilling and slotting integrated device for hydraulic fracturing of the present application;

[0024] Figure 2 It is a drill bit diagram of a drilling and slotting integrated device for hydraulic fracturing of the present application;

[0025] Figure 3 It is a body diagram of a drilling and slotting integrated device for hydraulic fracturing of the present application;

[0026] Figure 4 It is a piston diagram of a drilling and slotting integrated device for hydraulic fracturing of the present application;

[0027] Figure 5 It is a cutting tool body blade part extension diagram of a drilling and slotting integrated device for hydraulic fracturing of the present application.

[0028] MAIN REFERENCE NUMERALS EXPLANATION:

[0029] 1-drill bit; 2-intercepting member; 3-first elastic member; 4-cutting tool body; 5-body; 6-pivot; 7-piston; 8-third elastic member; 9-second elastic member; 10-plug; 11-sealing ring; 12-adjusting member; 13-retaining positioning structure; 20-approaching positioning structure; 21-first fluid passage; 22-through hole; 23-step chamber; 24-cutting tool body storage part; 25-sliding surface; 26-intercepting cavity; 27-flow-through hole; 31-guide hole; 32-plugging surface; 33-opening part; 41-hinge hole; 42-piston internal thread; 43-sealing groove; 61-drilled hole; 62-fracturing slot. DETAILED DESCRIPTION

[0030] The present application provides a drilling and slotting integrated device and method for hydraulic fracturing, solves the problems of complex drilling and slotting process and long time consumption in the existing coal mining process, and the overall idea is as follows:

[0031] Referring to Figure 1 , the application provides a drilling and slotting integrated device for hydraulic fracturing, which is used for drilling or slotting under the action of a power mechanism and comprises a body 5, a drill bit 1, a cutting tool body 4 and a driving member. The body 5 is provided with a cutting tool body receiving portion 24, and an opening portion 33 for the blade portion of the cutting tool body 4 to extend out of the body 5 is arranged at a position corresponding to the cutting tool body receiving portion 24 on the body 5; the drill bit 1 is arranged on the body 5 and is provided with a cutting end for drilling; the cutting tool body 4 is arranged in the cutting tool body receiving portion 24 and is provided with a blade portion for slotting the side wall of the hole drilled by the drill bit 1; and the driving member is connected with the cutting tool body 4 to drive the cutting tool body 4 to move so that the blade portion of the cutting tool body 4 extends out of the body 5 from the opening portion 33. The drilling and slotting integrated device for hydraulic fracturing integrally arranges the drill bit 1 for realizing the drilling function and the cutting tool body 4 for realizing the slotting function. During drilling construction, the cutting tool body 4 is hidden in the cutting tool body receiving portion 24 and does not affect the drilling operation. During slotting construction, the driving member of the drilling and slotting integrated device for hydraulic fracturing pushes the blade portion of the cutting tool body 4 to extend out of the opening portion 33 under the action of force to perform the slotting operation, thereby improving the functionalization and structuralization level of the device. Without changing the original drilling process, the drilling process and the slotting process can be completed at one time, the cumbersome operation on the field equipment is simplified, and the operation intensity of the construction personnel is reduced.

[0032] To further improve the modularization level, the drill bit 1 of the drilling and slotting integrated device for hydraulic fracturing is in a detachable connection mode. Specifically, the drill bit 1 further comprises a mounting end; the body 5 comprises a first end and a second end, and the first end of the body 5 is provided with a first connecting portion connected with the mounting end of the drill bit 1; the driving member is arranged inside the body 5; and the cutting tool body receiving portion 24 is located inside the body 5. For example Figure 1 , as shown in the figure, the first connecting portion of the body 5 is provided with a concave cavity, the mounting end of the drill bit 1 is provided with an external thread, and the internal thread arranged in the concave cavity is threadedly connected with the external thread; similarly, as shown in Figure 3 , the body 5 can be provided with a structure such as an internal thread at the second end to realize connection in cooperation with the power mechanism. Meanwhile, when the components are designed, the hole diameter of the cutting end of the drill bit 1 can be greater than the outer diameter of the body 5 to facilitate chip removal. Through this mode, the convenience of maintenance and replacement of the corresponding components such as the drill bit 1 and the body 5 of the device can be realized, and the use cost is reduced.

[0033] In this example, the drilling and slotting integrated device for hydraulic fracturing introduces an external fluid pipeline to cool and flush the drill bit 1. Preferably, referring to Figure 2In the example, the second end of the borehole and slot integrated device body 5 for hydraulic fracturing is provided with a fluid inflow cavity; the drill bit 1 is provided with a cutoff cavity 26; the body 5 is provided with a first fluid passage 21, the first end of the first fluid passage 21 is in communication with the fluid inflow cavity, and the second end of the first fluid passage 21 is in communication with the cutoff cavity 26 in the drill bit 1; wherein the cutoff cavity 26 is provided with a cutoff piece 2, and a sealing surface 32 adapted between the inner wall of the cutoff cavity 26 and the cutoff piece 2, for example, the sealing surface 32 can adopt a conical surface, the drill bit 1 is provided with a through-flow hole 27, one end of the through-flow hole 27 is opened to the outside of the drill bit 1, and the other end is opened to the sealing surface 32; the integrated device further includes a sealing and controlling structure connected with the cutoff piece 2. In the example, as shown in Figure 2 the drill bit 1 is provided with two through-flow holes 27 on both sides of the cutoff cavity 26, which can cool the two cutting tool bits of the cutting end of the drill bit 1 respectively, through the first fluid passage 21, the inflowing cooling liquid can cool the cutting part of the drill bit 1 in working state, clean the drill cuttings under the action of the sealing and controlling structure, ensure normal drilling, and obtain the drilled hole 61. Preferably, the body 5 is tubular, and the first connecting part and the cutting tool body receiving part 24 have a first wall body; the first fluid passage 21 is arranged in the pipe wall of the body 5. Specifically, as shown in Figure 3 the first fluid passage 21 can be formed by machining a long hole in the pipe wall of the body 5 to build a communication passage of the cutoff cavity 26 and the fluid inflow cavity of the drill bit 1 through the body 5.

[0034] The sealing structure can be constructed in various ways, for example, using elastic devices or magnetic devices to construct the force applying mode of the flow blocking member 2. Preferably, in this example, the sealing structure includes a first elastic member 3, such as a spring, arranged in the flow blocking cavity 26, and the first elastic member 3 is arranged between the flow blocking member 2 and the first wall body. The drill bit 1 is also provided with a guide hole 31 that penetrates the exterior of the drill bit 1 and the flow blocking cavity 26. The flow blocking member 2 includes a flow blocking seat and a guide rod connected to the flow blocking seat. The flow blocking seat is adapted to the sealing surface 32 on the inner wall of the flow blocking cavity 26, and the guide rod is arranged in the guide hole 31. The guide rod of the flow blocking member 2 can move along the guide hole 31 under the action of the first elastic member 3 and the external to-be-drilled part, thereby achieving the sealing or flow control of the cooling liquid at the through-flow hole 27 of the drill bit 1. During drilling, the drill bit 1 is tightly positioned on the to-be-drilled part, the guide rod of the flow blocking member 2 is retracted along the guide hole 31, and the cooling liquid flows through the first fluid passage 21, the flow blocking cavity 26, and the through-flow hole 27 to cool and flush the drill bit 1. After the drilling is completed, the drill bit 1 is retracted by the water fracturing and slotted drilling integrated device, the guide rod of the flow blocking member 2 is extended along the guide hole 31 under the action of the first elastic member 3, and the through-flow hole 27 is sealed by the sealing surface 32, thereby closing the first fluid passage 21 and adapting the function of the device to the drilling condition. It should be noted that in some application scenarios, when the sealing structure is designed by selecting the specific structure of the components: when the flow blocking seat is pressed against the sealing surface 32 on the inner wall of the flow blocking cavity 26, the guide rod protrudes from the cutting end of the drill bit 1 to better adapt to the corresponding working condition.

[0035] The driving member that pushes the cutting blade body 4 to make the blade part extend out of the opening part 33 can have various forms, such as a swing guide rod mechanism, etc. In this embodiment, in order to achieve more stable stress and fluid control function, the driving member includes a piston 7 arranged in the lumen of the body 5. The piston 7 is hinged to one end of the cutting blade body 4, and the lumen of the body 5 is provided with a matching sliding surface 25 at the position of the other end of the cutting blade body 4. The piston 7 has a stress surface to move axially along the body 5 under the action of force, for example, the fluid such as cooling liquid in this example acts on the stress surface to form a driving force. The cooling liquid and other fluids can be sourced from a power mechanism such as the hollow drill rod in this example. The piston 7 is hinged to one end of the cutting blade body 4, as shown in Figure 1 、 Figure 4 , the piston 7 is provided with a hinge hole 41 and is rotationally connected to the cutting blade body 4 through a pin shaft 6. The lumen of the body 5 is provided with a matching sliding surface 25 at the other end of the cutting blade body 4, so that when the cutting blade body 4 moves along the sliding surface 25 under the pushing of the piston 7, the blade part can extend out of the opening part 33, as shown in Figure 5The inner wall of the lumen of the body 5 is provided with a stop position structure 20 on one side of the extension direction of the piston 7 and a retreat position structure 13 on the other side of the retraction direction of the piston 7. The stop position structure 20 and the piston 7 are provided with a second elastic element 9 such as a spring. The stop position structure 20 and the retreat position structure 13 can limit the movement range of the piston 7. In this example, the stop position structure 20 is a ring structure protruding from the inner wall of the lumen of the body 5, and the retreat position structure 13 is a ring-shaped plug threadedly connected to the wall of the body 5. The retreat position structure 13 is used in cooperation with the second elastic element 9. By adjusting the position of the retreat position structure 13, the initial pre-tightening force of the second elastic element 9 can be adjusted, so that the piston 7 can move the cutting tool body 4 under the corresponding fluid pressure. At the same time, in order to ensure the working efficiency of the fluid such as cooling liquid acting on the force surface of the piston 7, a sealing structure is provided between the piston 7 and the lumen of the body 5. Specifically, a sealing groove 43 is formed on the outer position of the piston 7 between the second elastic element 9 and the retreat position structure 13, and a sealing ring 11 is embedded in the sealing groove 43, thereby forming a sealing function between the piston 7 and the wall of the body 5.

[0036] Further, the piston 7 of the drilling and slitting integrated device for hydraulic fracturing is provided with a second fluid passage. The first end of the second fluid passage is in communication with the fluid inlet chamber, and the second end of the second fluid passage is in communication with the cutting tool body receiving portion 24. The piston 7 is provided with a stepped chamber 23 at the first end of the second fluid passage. The stepped chamber 23 is sequentially provided with an adjusting element 12, a plug body 10, and a third elastic element 8 in the extension direction of the piston 7. The adjusting element 12 is provided with a through hole 22. The plug body 10 is abutted with the through hole 22 of the adjusting element 12, and the shape of the abutted part is matched to block the through hole 22. Specifically, the plug body 10 can adopt a spherical structure, and the third elastic element 8 can also adopt a cylindrical spring. Please refer to Figure 4 In this example, the piston 7 is provided with a stepped chamber 23 along the axial direction to clamp the third elastic element 8 and flow the cooling liquid. The piston 7 is provided with an inner thread 42 at the corresponding position of the end portion, so that the adjusting element 12 is threadedly connected to the end portion of the stepped chamber 23 of the piston 7, and the initial pre-tightening force of the third elastic element 8 is adjusted by thread distance adjustment, so that the plug body 10 blocks or opens the through hole 22 of the adjusting element 12 under the corresponding fluid pressure, thereby forming a valve body to realize the communication or closure of the second fluid passage. Therefore, the stop position structure 20, the retreat position structure 13, the second elastic element 9, and the third elastic element 8, the plug body 10, and the adjusting element 12 which constitute the valve body function are provided on the piston 7 of the drilling and slitting integrated device for hydraulic fracturing, so that the device realizes the extension of the blade of the cutting tool body 4, the flow of the cooling liquid, and the slitting operation under different fluid pressure thresholds, and further improves the functionality and adaptability of the device to the working environment.

[0037] Specifically, in the use process, the application also provides a drilling and slitting method:

[0038] First, the drilling and slotting integrated device for hydraulic fracturing is connected with the power mechanism;

[0039] During drilling, the drill bit 1 abuts against the drilling site, the flow blocking member 2 is retracted to open the through-flow hole 27, the fluid is cooled and flushed to the drill bit 1 by the power mechanism through the first fluid channel 21 and the through-flow hole 27, and the drill bit 1 performs drilling work under the action of the power mechanism;

[0040] During slotting, the drill bit 1 is set to a proper predetermined depth, the drill rod is slightly retracted, the drill bit no longer tightly abuts against the hole bottom, the flow blocking member 2 is blocked under the action of the first elastic member 3 to close the through-flow hole 27, the fluid pressure from the power mechanism is increased and drives the cutting blade body 4 to move along the sliding surface 25, the blade of the cutting blade body 4 extends out of the opening 33 and abuts against the site to be cut, the fluid pressure from the power mechanism is increased to open the second fluid channel, the fluid is cooled and flushed to the cutting blade body 4 by the power mechanism through the second fluid channel and the opening 33, and the cutting blade body 4 performs cutting work under the action of the power mechanism;

[0041] After the slotting is completed, the fluid pressure of the power mechanism is closed, and the cutting blade body 4 moves along the sliding surface 25 to the cutting blade body storage part 24 under the action of the second elastic member 9.

[0042] It should be noted that under the action of the hollow drill rod driven by the drilling machine as in the example, the cutting blade body 4 starts to cut the rock wall, the piston 7 gradually moves forward under the action of the fluid pressure, so that the cutting blade body 4 is in close contact with the hole wall, and continuous cutting can be performed, and when the piston 7 moves to the stop positioning structure 20 of the lumen of the body 5, it no longer moves, thereby ensuring the safe performance of the cutting.

[0043] Through the above method, the drilled hole 61 can be obtained by continuous drilling of the coal seam roof, or the wedge-shaped fracturing crack 62 can be formed by slotting.

[0044] In summary, the drilling and slotting integrated device and method for hydraulic fracturing can complete the drilling process and the slotting process at one time without changing the original drilling process, the device is convenient to use and reliable in performance, and the work intensity of the field construction personnel is reduced.

[0045] Finally, it should be noted that: obviously, the above examples are only examples for clearly illustrating the application, and are not limitations on the embodiments. For ordinary skilled persons in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to exhaust all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the application.

Claims

1. A borehole slotting integrated device for hydraulic fracturing, for drilling or slotting under the action of a power mechanism, characterized in that, The integrated device comprises: a body, a cutting tool receiving portion is arranged on the body, an opening portion is arranged on the body corresponding to the cutting tool receiving portion, and a blade of the cutting tool can extend out of the body through the opening portion; a drill bit is arranged on the body, and a cutting end for drilling is arranged on the drill bit; a cutting tool is arranged in the cutting tool receiving portion, and a blade for slitting a side wall of a hole drilled by the drill bit is arranged on the cutting tool; a driving member is connected with the cutting tool to drive the cutting tool to move and make the blade of the cutting tool extend out of the body through the opening portion; the drill bit further comprises a mounting end, a first connecting portion connecting the mounting end of the drill bit is arranged on a first end of the body, the driving member is arranged inside the body, and the cutting tool receiving portion is arranged inside the body; a fluid inflow cavity is arranged on a second end of the body, a cutoff cavity is arranged in the drill bit, a first fluid passage is arranged on the body, a first end of the first fluid passage is in communication with the fluid inflow cavity, a second end of the first fluid passage is in communication with the cutoff cavity in the drill bit, a cutoff member is arranged in the cutoff cavity, a sealing surface is formed between an inner wall of the cutoff cavity and the cutoff member, a through-flow hole is arranged on the drill bit, one end of the through-flow hole is open to the outside of the drill bit, and the other end of the through-flow hole is open to the sealing surface, and the integrated device further comprises a control structure connected with the cutoff member.

2. The borehole slotting integrated device for hydraulic fracturing according to claim 1, characterized in that, The body is tubular, a first wall is arranged between the first connecting portion and the cutting tool receiving portion, and the first fluid passage is arranged in a pipe wall of the body.

3. The borehole slotting integrated device for hydraulic fracturing according to claim 2, characterized in that, The control structure comprises a first elastic member arranged in the cutoff cavity, the first elastic member is arranged between the cutoff member and the first wall, a guide hole is further arranged on the drill bit and extends through the outside of the drill bit and the cutoff cavity, the cutoff member comprises a cutoff seat and a guide rod connected with the cutoff seat, the cutoff seat is matched with the sealing surface on the inner wall of the cutoff cavity, and the guide rod is arranged in the guide hole.

4. The borehole slotting integrated device for hydraulic fracturing according to any one of claims 2-3, characterized in that, The driving member comprises a piston arranged in a pipe cavity of the body, one end of the piston is hinged with the cutting tool, and a sliding surface is arranged on the pipe cavity at a position of the other end of the cutting tool.

5. The borehole slotting integrated device for hydraulic fracturing according to claim 4, characterized by, A forward positioning structure is arranged on one side of the inner wall of the pipe cavity in an extension direction of the piston, a backward positioning structure is arranged on the other side of the inner wall of the pipe cavity in a retraction direction of the piston, and a second elastic member is arranged between the forward positioning structure and the piston.

6. The borehole slotting integrated device for hydraulic fracturing according to claim 5, characterized in that, A second fluid passage is arranged in the piston, a first end of the second fluid passage is in communication with the fluid inflow cavity, and a second end of the second fluid passage is in communication with the cutting tool receiving portion; a stepped cavity is arranged on the first end of the second fluid passage of the piston, an adjusting member, a plug body and a third elastic member are arranged in the stepped cavity in sequence in the extension direction of the piston, the adjusting member is provided with a through hole, and the plug body is matched with the through hole of the adjusting member in shape at a position where the plug body abuts against the through hole.

7. The borehole slotting integrated device for hydraulic fracturing according to claim 3, characterized in that, When the cutoff seat of the control structure is pressed against the sealing surface on the inner wall of the cutoff cavity, the guide rod protrudes out of the cutting end of the drill bit.

8. A method of drilling a slot for use in the integrated drilling and slotting device for hydraulic fracturing according to any one of claims 1 to 7, characterized by, The integrated device comprises: During drilling, the drill bit abuts the drilling site, the flow blocking member is retracted to open the through-flow hole, fluid is cooled and flushed to the drill bit by the power mechanism through the first fluid channel and the through-flow hole, and the drill bit performs drilling work under the action of the power mechanism; During slotting, the drill bit is set to a predetermined depth, the flow blocking member blocks the through-flow hole under the action of the first elastic member, fluid pressure from the power mechanism is increased and pushes the cutting tool body to move along the sliding surface, the blade of the cutting tool body extends out of the opening and abuts the site to be cut, fluid pressure from the power mechanism is increased and the second fluid channel is opened, fluid is cooled and flushed to the cutting tool body by the power mechanism through the second fluid channel and the opening, and the cutting tool body performs cutting work under the action of the power mechanism; After the slotting is completed, the fluid pressure of the power mechanism is closed, and the cutting tool body moves to the storage part along the sliding surface under the action of the second elastic member.

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