Shale oil development fracturing device

Abstract

The invention relates to the technical field of oil and gas development, in particular to a shale oil development fracturing device which comprises a base, a hollow drill rod, a fracturing assembly, a first conveying assembly and a first driving assembly. A receding hole is formed in the center of the top face of the base, the hollow drill rod is arranged on the inner side of the receding hole, and the fracturing assembly is arranged at the bottom of the hollow drill rod. The first conveying assembly comprises a material storage barrel, the material storage barrel is of an annular structure, the center axis of the material storage barrel, the center axis of the avoiding hole and the center axis of the hollow drill rod are collinear, and a material pumping device is arranged at the top of the material storage barrel. The first driving assembly is arranged on the top face of the base, and the output end of the first driving assembly is connected with the top of the hollow drill rod. When the device is used, after fracturing materials are transferred into the hollow drill rod from the storage barrel, the overall gravity center of the device cannot deviate in the horizontal direction, and therefore the stability of the device in the fracturing process can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas development, and specifically to a fracturing device for shale oil development. Background Art

[0002] Shale oil is an unconventional oil resource mainly existing in shale rocks, which is transformed from organic matter under high pressure and high temperature and has an important impact on the global oil market. When extracting shale oil, a fracturing device is required to fracture the shale so that the oil and gas in the shale can be completely released, thereby achieving the purpose of increasing production. For example, the Chinese invention patent with the patent application number "CN202410007040.2" provides a three-dimensional development fracturing device for shale oil. When this device is in use, first, holes are drilled on the surface of the fracture. Then, after the fracturing materials in the feeding cylinder are stirred, they enter the hollow drill pipe through the feeding pipe and finally enter the holes for fracturing.

[0003] The disadvantage of this device is that the hollow drill pipe and the feeding cylinder are respectively arranged at both ends of the platform. When the fracturing materials are transferred from the feeding cylinder to the hollow drill pipe, the overall center of gravity of the device will shift horizontally, thereby reducing the stability of the device during the fracturing process. Summary of the Invention

[0004] The purpose of the present invention is to provide a fracturing device for shale oil development. The storage cylinder has an annular structure, and the central axes of the storage cylinder, the avoidance hole, and the hollow drill pipe are collinear. When the fracturing materials are transferred from the storage cylinder to the hollow drill pipe, the overall center of gravity of the present invention will not shift horizontally. Therefore, the stability of the present invention during the fracturing process can be improved.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A fracturing device for shale oil development, comprising: a base, with an avoidance hole provided at the center of the top surface of the base; a hollow drill pipe provided inside the avoidance hole; a fracturing assembly fixedly arranged at the bottom of the hollow drill pipe; a first conveying assembly, the first conveying assembly includes a storage cylinder, the storage cylinder has an annular structure and is fixedly arranged on the top surface of the base. The central axes of the storage cylinder, the avoidance hole, and the hollow drill pipe are collinear. A material extractor is provided at the top of the storage cylinder. The feeding end of the material extractor is communicated with the inside of the storage cylinder, and the discharging end of the material extractor is communicated with the inside of the hollow drill pipe; a first driving assembly fixedly arranged on the top surface of the base, and the output end of the first driving assembly is connected to the top of the hollow drill pipe for driving the hollow drill pipe to rotate and move in the vertical direction.

[0006] Preferably, the fracturing assembly includes: a fitting cylinder, the top of the fitting cylinder is fixedly connected to the bottom of the hollow drill pipe, and the bottom surface of the fitting cylinder is open; an adjusting cylinder, arranged below the fitting cylinder and rotatably connected to the fitting cylinder, the top surface of the adjusting cylinder is open, the outer side wall of the adjusting cylinder is aligned with the outer side wall of the fitting cylinder, a first branch pipe and a second branch pipe are arranged on the inner side wall of the adjusting cylinder, a drilling assembly is arranged inside the first branch pipe, and the inside of the second branch pipe is communicated with the inside of the hollow drill pipe; a first drill bit, arranged below the adjusting cylinder and fixedly connected to the adjusting cylinder; a locking assembly, arranged inside the fitting cylinder, and the locking assembly can control the fitting cylinder and the adjusting cylinder to jointly enter a connected state and a separated state; a second driving assembly, arranged inside the fitting cylinder, and the output end of the second driving assembly is connected to the adjusting cylinder for driving the adjusting cylinder to rotate.

[0007] Preferably, there are several first branch pipes and second branch pipes, and they are evenly distributed radially. The first branch pipes and the second branch pipes are arranged at intervals. A storage box is fixedly arranged on the inner top surface of the fitting cylinder, and the inside of the storage box is communicated with the inside of the hollow drill pipe. There are several second conveying assemblies below the storage box, and the positions of the several second conveying assemblies correspond to the positions of the several second branch pipes one by one; the second conveying assembly includes: a third branch pipe, fixedly arranged on the bottom surface of the storage box, and the inside of the third branch pipe is communicated with the inside of the storage box; a fourth branch pipe, fixedly arranged in the middle of the top surface of the second branch pipe, and the inside of the fourth branch pipe is communicated with the inside of the second branch pipe, and an electric control valve is arranged in the middle of the fourth branch pipe; a conveying hose, arranged between the third branch pipe and the fourth branch pipe, and both ends of the conveying hose are communicated with the inside of the third branch pipe and the fourth branch pipe respectively.

[0008] Preferably, the second driving assembly includes: a first motor fixedly arranged at the center of the outer ground of the storage box, the output end of the first motor facing downward and fixedly connected to the first end of a transmission shaft, and the second end of the transmission shaft is rotatably connected to the inner bottom surface of the adjusting cylinder; a plurality of transmission connecting rods radially fixedly arranged at the middle of the transmission shaft, the plurality of transmission connecting rods being divided into two groups, one group of the transmission connecting rods being respectively fixedly connected to the plurality of first branch pipes, and the other group of the transmission connecting rods being respectively fixedly connected to the plurality of second branch pipes; a first connecting disk sleeved on the outer side wall of the transmission shaft and located below the transmission connecting rods, the first connecting disk being fixedly connected to the transmission shaft; the drilling assembly includes: a transmission plate arranged in the first branch pipe and capable of sliding along the inner wall of the first branch pipe; a second motor fixedly arranged on the end surface of the transmission plate away from the transmission shaft; a second drill bit fixedly arranged at the output end of the second motor; a first electric telescopic rod fixedly arranged on the first connecting disk, the output end of the first electric telescopic rod facing the first branch pipe and fixedly connected to the end surface of the transmission plate close to the transmission shaft.

[0009] Preferably, the fracturing assembly further includes a plurality of propulsion assemblies, the plurality of propulsion assemblies corresponding to the positions of the plurality of second branch pipes one by one; the propulsion assembly includes: a propulsion plate arranged inside the second branch pipe close to the transmission shaft and capable of sliding along the inner wall of the second branch pipe; a second electric telescopic rod, a second connecting disk is further sleeved on the outer side wall of the transmission shaft, the second connecting disk is arranged below the first connecting disk and fixedly connected to the transmission shaft, and the second electric telescopic rod is fixedly connected to the second connecting disk; a zigzag transmission rod arranged between the second electric telescopic rod and the propulsion plate, the first end of the zigzag transmission rod being fixedly connected to the output end of the second electric telescopic rod, the second end of the zigzag transmission rod being fixedly connected to the propulsion plate, and both the first end and the second end of the zigzag transmission rod being in an L-shaped structure and being centrosymmetric.

[0010] Preferably, the locking assembly includes: a circular plate, the transmission shaft is arranged inside the circular plate, and the central axis of the circular plate coincides with the central median line of the transmission shaft; several insertion rods, which are radially arranged on the outer side wall of the circular plate, the insertion rods are of an L-shaped structure, several first assembly cavities are arranged inside the assembly cylinder, both ends of the first assembly cavity penetrate through the inner side wall and the bottom surface of the assembly cylinder respectively, several second assembly cavities are arranged inside the adjustment cylinder, the top of the second assembly cavity penetrates through the top surface of the adjustment cylinder, the positions of several said insertion rods, several said first assembly cavities and several said second assembly cavities correspond one by one, the first end of the insertion rod is fixedly connected with the circular plate, the second end of the insertion rod passes through the first assembly cavity and extends into the second assembly cavity; a third electric telescopic rod, fixedly arranged on the inner top surface of the assembly cylinder, the output end of the third electric telescopic rod faces downward and is fixedly connected with one of the insertion rods.

[0011] Preferably, a protruding part is arranged on the top of the outer side wall of the hollow drill rod, the inside of the protruding part is communicated with the inside of the hollow drill rod, the protruding part is of an annular structure, and several feeding holes are arranged on the top surface and the bottom surface of the protruding part; the first conveying assembly further includes: a material distributing sleeve, the protruding part is arranged inside the material distributing sleeve, the central axes of the material distributing sleeve, the hollow drill rod and the protruding part coincide, a feeding channel is jointly formed between the inner side wall of the material distributing sleeve, the outer side wall of the protruding part and the outer side wall of the hollow drill rod, there are two material extracting devices, which are respectively arranged at both ends of the top of the storage cylinder, the discharging ends of the two material extracting devices are both communicated with the feeding channel, the material distributing sleeve is connected with the output end of the first driving component, and the first driving component can drive the material distributing sleeve to move in the vertical direction; two blocking assemblies are respectively fixedly arranged at the centers of the outer top surface and the outer bottom surface of the material distributing sleeve.

[0012] Preferably, the blocking assembly includes: a receiving ring, the receiving ring is fixedly connected with the material distributing sleeve, the receiving ring coincides with the central axis of the hollow drill rod, and an annular receiving groove is arranged on the inner side wall of the receiving ring; an annular airbag, arranged in the annular receiving groove and fixedly connected with the receiving ring; an elastic sealing ring, fixedly arranged on the side wall of the annular airbag close to the hollow drill rod, and there is a gap between the elastic sealing ring and the outer side wall of the hollow drill rod; a pressure regulator, fixedly arranged on the outer side wall of the material distributing sleeve, and the output end of the pressure regulator is communicated with the inside of the annular airbag.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] (1) In the present invention, the hollow drill pipe is arranged inside the avoidance hole, and the material storage cylinder has an annular structure. The central axes of the material storage cylinder, the avoidance hole, and the hollow drill pipe are collinear. When in use, after the fracturing material is transferred from the material storage cylinder into the hollow drill pipe, the overall center of gravity of the present invention will not shift horizontally, so the stability of the present invention during the fracturing process can be improved.

[0015] (2) In the present invention, a protrusion is provided at the top of the outer sidewall of the hollow drill pipe, and feed holes are provided on both the top surface and the bottom surface of the protrusion. The first conveying assembly further includes a material distribution sleeve and two blocking assemblies. A feed channel is jointly formed among the inner sidewall of the material distribution sleeve, the outer sidewall of the protrusion, and the outer sidewall of the hollow drill pipe. The material distribution sleeve does not come into contact with the hollow drill pipe, and when the hollow drill pipe rotates, it will not be hindered by the material distribution sleeve. When the fracturing assembly reaches the predetermined position and the hollow drill pipe stops rotating, the two blocking assemblies can block the top and bottom of the feed channel. There are two material extractors, and the two material extractors can simultaneously pump the fracturing material in the material storage cylinder into the feed channel through the long hose. Subsequently, the fracturing material in the feed channel can enter the hollow drill pipe through a number of feed holes. Description of the Drawings

[0016] Figure 1 is an axonometric view of the present invention;

[0017] Figure 2 is a side sectional view of the present invention;

[0018] Figure 3 is Figure 2 the enlarged view at A in

[0019] Figure 4 is an axonometric view of the base in the present invention;

[0020] Figure 5 is an axonometric sectional view of the hollow drill pipe in the present invention;

[0021] Figure 6 is Figure 5 the enlarged view at B in

[0022] Figure 7 is an axonometric sectional view of the fracturing assembly in the present invention;

[0023] Figure 8 is an axonometric sectional view of the assembly cylinder in the present invention;

[0024] Figure 9 is an axonometric view of the adjusting cylinder and the first drill bit in the present invention;

[0025] Figure 10 is an axonometric view of the drilling assembly in the present invention;

[0026] Figure 11Isometric view of the locking component in the present invention;

[0027] Figure 12 Isometric view of the second driving component in the present invention;

[0028] Figure 13 Isometric view of the storage box and the second conveying component in the present invention;

[0029] Figure 14 Isometric view of the propulsion component in the present invention;

[0030] Figure 15 Isometric view of the first conveying component in the present invention;

[0031] Figure 16 Exploded isometric view of the plugging component in the present invention.

[0032] Reference numerals include:

[0033] 1 - Base, 11 - Avoidance hole, 2 - Hollow drill pipe, 21 - Protrusion, 22 - Feed hole, 3 - Fracturing component, 31 - Assembly cylinder, 311 - First assembly cavity, 32 - Adjusting cylinder, 321 - First branch pipe, 322 - Second branch pipe, 323 - Second assembly cavity, 33 - Drilling component, 331 - Transmission plate, 332 - Second motor, 333 - Second drill bit, 334 - First electric telescopic rod, 34 - First drill bit, 35 - Locking component, 351 - Ring plate, 352 - Plug rod, 353 - Third electric telescopic rod, 36 - Second driving component, 361 - First motor, 362 - Transmission shaft, 363 - Transmission connecting rod, 364 - First connection disk, 365 - Second connection disk, 37 - Storage box, 38 - Second conveying component, 381 - Third branch pipe, 382 - Fourth branch pipe, 383 - Electric control valve, 384 - Feeding hose, 39 - Propulsion component, 391 - Propulsion plate, 392 - Second electric telescopic rod, 393 - Zigzag transmission rod, 4 - First conveying component, 41 - Storage cylinder, 42 - Material extraction device, 43 - Material distribution sleeve, 44 - Feed channel, 45 - Plugging component, 451 - Receiving ring, 4511 - Ring receiving groove, 452 - Ring-shaped airbag, 453 - Elastic sealing ring, 454 - Air pressure regulator, 5 - First driving component. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] Embodiment 1

[0036] See also Figure 1-16 The present invention provides a technical solution: a shale oil development fracturing device, comprising a base 1, a hollow drill rod 2, a fracturing assembly 3, a first conveying assembly 4 and a first driving assembly 5. A avoidance hole 11 is provided at the center of the top surface of the base 1. The first conveying assembly 4 comprises a storage barrel 41 and a pump 42. When the present invention is in use, the fracturing material after stirring first enters the storage barrel 41, and then the first driving assembly 5 drives the hollow drill rod 2 and the fracturing assembly 3 to move downward while rotating, and the fracturing assembly 3 is driven into the ground. When the fracturing assembly 3 reaches the predetermined position, the fracturing assembly 3 performs a drilling operation, and the pump 42 can pump the fracturing material in the storage barrel 41 into the hollow drill rod 2. The fracturing material first enters the fracturing assembly 3 and then enters the borehole, thereby performing fracturing, making the fracturing more comprehensive and efficient. Since the material storage barrel 41 is an annular structure, the central axes of the material storage barrel 41, the avoidance hole 11 and the hollow drill rod 2 are collinear. When the fracturing material is transferred from the material storage barrel 41 to the hollow drill rod 2, the center of gravity of the whole of the present invention will not shift in the horizontal direction, thereby improving the stability of the present invention during the fracturing process.

[0037] See also Figure 1-16 In the present invention, the first drive assembly 5 includes a shaped frame, a first drive motor, a threaded rod, a drive plate, a support frame and a second drive motor. When the first drive assembly 5 is working, the first drive motor drives the threaded rod to rotate forward and reverse, which can drive the drive plate to rise and fall, and then drive the second drive motor at the bottom of the support frame to rise and fall. Since the top of the hollow drill rod 2 is connected to the output end of the second drive motor, the hollow drill rod 2 can move in the vertical direction together with the second drive motor, and the second drive motor can drive the hollow drill rod 2 to rotate. In the present invention, fixed cones are provided at the four corners of the base 1, and the fixed cones can be inserted into the ground, and the present invention as a whole is axially symmetrical along the central axis of the hollow drill rod 2, so the stability can be further improved.

[0038] See also Figure 1-12, the fracturing assembly 3 includes an assembly cylinder 31, an adjusting cylinder 32, a plurality of drilling assemblies 33, a first drill bit 34, a locking assembly 35 and a second driving assembly 36. A first branch pipe 321 and a second branch pipe 322 are provided on the inner side wall of the adjusting cylinder 32. There are several first branch pipes 321 and second branch pipes 322, and they are evenly distributed radially, so that drilling and fracturing can be carried out in multiple directions. When the first driving assembly 5 drives the hollow drill pipe 2 to rotate, the locking assembly 35 enables the assembly cylinder 31 and the adjusting cylinder 32 to enter the connected state together. At this time, the assembly cylinder 31, the adjusting cylinder 32 and the first drill bit 34 can rotate together and enter the interior of the land. When the fracturing assembly 3 reaches the predetermined position, the first driving assembly 5 controls the hollow drill pipe 2 to stop rotating, and the drilling assembly 33 in the first branch pipe 321 performs the drilling operation. After the drilling is completed, the locking assembly 35 enables the assembly cylinder 31 and the adjusting cylinder 32 to enter the separated state together, and the second driving assembly 36 drives the adjusting cylinder 32, a plurality of drilling assemblies 33, the first drill bit 34 and the locking assembly 35 to rotate together, so that the second branch pipe 322 is aligned with the drilled hole. Next, the fracturing material is first transferred from the storage cylinder 41 to the hollow drill pipe 2, then enters the second branch pipe 322 from the hollow drill pipe 2, and finally the fracturing material is discharged from the second branch pipe 322 and enters the drilled hole to complete the fracturing.

[0039] Embodiment 2

[0040] On the basis of Embodiment 1, please refer to Figure 1-12 , the drilling assembly 33 includes a transmission plate 331, a second motor 332, a second drill bit 333 and a first electric telescopic rod 334. When the drilling assembly 33 works, the first electric telescopic rod 334 extends, drives the second motor 332 and the second drill bit 333 to move outward from the first branch pipe 321 together through the transmission plate 331. At this time, the second motor 332 drives the second drill bit 333 to rotate to complete the drilling work. After the drilling is completed, the second motor 332 controls the second drill bit 333 to stop rotating, and the first electric telescopic rod 334 shortens, driving the second drill bit 333 back into the first branch pipe 321.

[0041] Please refer to Figure 1-12, the locking assembly 35 includes an annular plate 351, a plurality of insertion rods 352, and two third electric telescopic rods 353. A plurality of first assembly cavities 311 are provided inside the assembly cylinder 31, and a plurality of second assembly cavities 323 are provided inside the adjustment cylinder 32. When the assembly cylinder 31 and the adjustment cylinder 32 need to enter the connected state, the third electric telescopic rod 353 extends, driving the annular plate 351 and the plurality of insertion rods 352 to move downward together. The second end of the insertion rod 352 passes through the first assembly cavity 311 and extends into the second assembly cavity 323, and the adjustment cylinder 32 cannot rotate. When the assembly cylinder 31 and the adjustment cylinder 32 need to enter the separated state, the third electric telescopic rod 353 contracts, driving the annular plate 351 and the plurality of insertion rods 352 to move upward together. The second end of the insertion rod 352 leaves the second assembly cavity 323, and the adjustment cylinder 32 can rotate.

[0042] Please refer to Figure 1-12 , the second driving assembly 36 includes a first motor 361, a transmission shaft 362, a plurality of transmission connecting rods 363, and a first connecting disk 364. When the second driving assembly 36 works, the first motor 361 drives the transmission shaft 362 to rotate forward. The transmission shaft 362 drives a plurality of first branch pipes 321 and a plurality of second branch pipes 322 to rotate forward together through a plurality of transmission connecting rods 363, thereby driving the adjustment cylinder 32 to rotate forward so that the second branch pipes 322 are aligned with the drilled holes. During this process, the first connecting disk 364 can drive a plurality of drilling assemblies 33 to rotate together. After the fracturing process is completed, the first motor 361 drives the transmission shaft 362 to rotate reversely, and the adjustment cylinder 32 rotates reversely to reset.

[0043] Please refer to Figure 1-13 , the fracturing assembly 3 further includes a storage box 37 and a plurality of second conveying assemblies 38. The second conveying assembly 38 includes a third branch pipe 381, a fourth branch pipe 382, an electric control valve 383, and a feeding hose 384. After the fracturing material enters the hollow drill pipe 2, the electric control valve 383 opens, and the fracturing material can move downward into the storage box 37. The fracturing material then enters a plurality of feeding hoses 384 through a plurality of third branch pipes 381 respectively, and then enters a plurality of fourth branch pipes 382 respectively, and finally enters a plurality of second branch pipes 322 respectively. After the fracturing material enters the second branch pipe 322, the electric control valve 383 closes, and when the fracturing material enters the drilled hole to complete fracturing, it will not flow back into the feeding hose 384.

[0044] Please refer to Figure 1-14, the fracturing assembly 3 further includes a plurality of propulsion assemblies 39, and each propulsion assembly 39 includes a propulsion plate 391, a second electric telescopic rod 392, and a zigzag transmission rod 393. The second drive assembly 36 further includes a second connection disk 365. When the transmission shaft 362 rotates, it can drive a plurality of propulsion assemblies 39 to rotate together through the second connection disk 365. When the fracturing material enters the second branch pipe 322 and the electric control valve 383 is closed, the second electric telescopic rod 392 extends, drives the propulsion plate 391 to move outward from the second branch pipe 322 through the zigzag transmission rod 393, and the propulsion plate 391 drives the fracturing material to leave the second branch pipe 322 and enter the drilled hole to complete the fracturing.

[0045] Embodiment III

[0046] Based on Embodiment I, please refer to Figure 1-16 , a protrusion 21 is provided at the top of the outer side wall of the hollow drill pipe 2, and feed holes 22 are provided on both the top surface and the bottom surface of the protrusion 21. The first conveying assembly 4 further includes a material distribution sleeve 43 and two plugging assemblies 45. An inlet channel 44 is jointly formed among the inner side wall of the material distribution sleeve 43, the outer side wall of the protrusion 21, and the outer side wall of the hollow drill pipe 2. The material distribution sleeve 43 does not come into contact with the hollow drill pipe 2, and when the hollow drill pipe 2 rotates, it will not be obstructed by the material distribution sleeve 43. In the first drive assembly 5, two L-shaped traction rods are provided at the bottom of the drive plate, and the material distribution sleeve 43 is connected to the drive plate through the traction rods. Therefore, the material distribution sleeve 43 and the hollow drill pipe 2 can move synchronously in the vertical direction. When the fracturing assembly 3 reaches the predetermined position and the hollow drill pipe 2 stops rotating, the two plugging assemblies 45 can plug the top and bottom of the inlet channel 44. In the present invention, there are two material extractors 42, and the two material extractors 42 can simultaneously pump the fracturing material in the storage cylinder 41 into the inlet channel 44 through the long hose. Subsequently, the fracturing material in the inlet channel 44 can enter the hollow drill pipe 2 through a plurality of feed holes 22.

[0047] Please refer to Figure 1-16, the plugging assembly 45 includes a receiving ring 451, an annular airbag 452, an elastic sealing ring 453 and a pressure regulator 454. When the hollow drill pipe 2 rotates, the annular airbag 452 is in a contracted state, and both the annular airbag 452 and the elastic sealing ring 453 are received in the annular receiving groove 4511. The elastic sealing ring 453 is stretched and expanded by the annular airbag 452, and the elastic sealing ring 453 does not contact the hollow drill pipe 2. When the plugging assembly 45 works, the pressure regulator 454 conveys external air into the annular airbag 452, and the annular airbag 452 is in an inflated state. The elastic sealing ring 453 contracts and closely adheres to the outer sidewall of the hollow drill pipe 2. After the fracturing process is completed, the pressure regulator 454 extracts the gas in the annular airbag 452, the annular airbag 452 contracts again, the elastic sealing ring 453 leaves the outer sidewall of the hollow drill pipe 2, and the annular airbag 452 and the elastic sealing ring 453 re-enter the annular receiving groove 4511.

[0048] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed claim.

[0049] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A fracturing device for shale oil development, characterized in that, Comprising: A base, at the center of the top surface of the base is provided with an avoidance hole; A hollow drill pipe, arranged inside the avoidance hole; A fracturing assembly, fixedly arranged at the bottom of the hollow drill pipe; A first conveying assembly, the first conveying assembly includes a storage cylinder, the storage cylinder has an annular structure, and is fixedly arranged on the top surface of the base, the central axes of the storage cylinder, the avoidance hole and the hollow drill pipe are collinear, a material extraction device is arranged at the top of the storage cylinder, the feed end of the material extraction device is communicated with the inside of the storage cylinder, and the discharge end of the material extraction device is communicated with the inside of the hollow drill pipe; A first driving assembly, fixedly arranged on the top surface of the base, the output end of the first driving assembly is connected to the top of the hollow drill pipe, and is used for driving the hollow drill pipe to rotate and move in the vertical direction.

2. The fracturing device for shale oil development according to claim 1, wherein The fracturing assembly includes: An assembly cylinder, the top of the assembly cylinder is fixedly connected to the bottom of the hollow drill pipe, and the bottom surface of the assembly cylinder is open; An adjusting cylinder, arranged below the assembly cylinder, and is rotatably connected to the assembly cylinder, the top surface of the adjusting cylinder is open, the outer side wall of the adjusting cylinder is aligned with the outer side wall of the assembly cylinder, a first branch pipe and a second branch pipe are arranged on the inner side wall of the adjusting cylinder, a drilling assembly is arranged inside the first branch pipe, and the inside of the second branch pipe is communicated with the inside of the hollow drill pipe; A first drill bit, arranged below the adjusting cylinder, and is fixedly connected to the adjusting cylinder; A locking assembly, arranged inside the assembly cylinder, the locking assembly can control the assembly cylinder and the adjusting cylinder to enter the connected state and the separated state together; A second driving assembly, arranged inside the assembly cylinder, the output end of the second driving assembly is connected to the adjusting cylinder, and is used for driving the adjusting cylinder to rotate.

3. The fracturing device for shale oil development according to claim 2, wherein, Both the first branch pipe and the second branch pipe have several, and are evenly distributed radially, the first branch pipe and the second branch pipe are arranged at intervals, a storage box is fixedly arranged on the inner top surface of the assembly cylinder, the inside of the storage box is communicated with the inside of the hollow drill pipe, and several second conveying assemblies are arranged below the storage box, and several the second conveying assemblies correspond to the positions of several the second branch pipes one by one; The second conveying assembly includes: A third branch pipe, fixedly arranged on the bottom surface of the storage box, the inside of the third branch pipe is communicated with the inside of the storage box; A fourth branch pipe, fixedly arranged in the middle of the top surface of the second branch pipe, the inside of the fourth branch pipe is communicated with the inside of the second branch pipe, and an electric control valve is arranged in the middle of the fourth branch pipe; A feeding hose, arranged between the third branch pipe and the fourth branch pipe, and the two ends of the feeding hose are respectively communicated with the inside of the third branch pipe and the fourth branch pipe.

4. The fracturing device for shale oil development according to claim 3, wherein The second driving assembly includes: A first motor, fixedly arranged at the center of the outer bottom surface of the storage box, the output end of the first motor faces downward, and is fixedly connected to the first end of a transmission shaft, and the second end of the transmission shaft is rotatably connected to the inner bottom surface of the adjusting cylinder; A number of transmission connecting rods are radially and fixedly arranged in the middle of the transmission shaft. The number of the transmission connecting rods is divided into two groups. One group of the transmission connecting rods is respectively fixedly connected with a number of the first branch pipes, and the other group of the transmission connecting rods is respectively fixedly connected with a number of the second branch pipes; A first connecting disk is sleeved on the outer side wall of the transmission shaft and is located below the transmission connecting rods. The first connecting disk is fixedly connected with the transmission shaft; The drilling assembly includes: A transmission plate is arranged in the first branch pipe and can slide along the inner wall of the first branch pipe; A second motor is fixedly arranged on the end surface of the transmission plate away from the transmission shaft; A second drill bit is fixedly arranged at the output end of the second motor; A first electric telescopic rod is fixedly arranged on the first connecting disk. The output end of the first electric telescopic rod faces the first branch pipe and is fixedly connected with the end surface of the transmission plate close to the transmission shaft.

5. The fracturing device for shale oil development according to claim 4, wherein The fracturing assembly further includes a number of propulsion assemblies, and the number of the propulsion assemblies respectively corresponds to the positions of a number of the second branch pipes; The propulsion assembly includes: A propulsion plate is arranged inside the second branch pipe close to the transmission shaft and can slide along the inner wall of the second branch pipe; A second electric telescopic rod. A second connecting disk is further sleeved on the outer side wall of the transmission shaft. The second connecting disk is arranged below the first connecting disk and is fixedly connected with the transmission shaft. The second electric telescopic rod is fixedly connected with the second connecting disk; A zigzag transmission rod is arranged between the second electric telescopic rod and the propulsion plate. The first end of the zigzag transmission rod is fixedly connected with the output end of the second electric telescopic rod, and the second end of the zigzag transmission rod is fixedly connected with the propulsion plate. The first end and the second end of the zigzag transmission rod are both in an L-shaped structure and are centrosymmetric.

6. The fracturing device for shale oil development according to claim 4, wherein, The locking assembly includes: An annular plate. The transmission shaft is arranged inside the annular plate, and the central axis of the annular plate is collinear with the central median line of the transmission shaft; A number of insertion rods are radially arranged on the outer side wall of the annular plate. The insertion rods are in an L-shaped structure. A number of first assembly cavities are arranged inside the assembly cylinder. The two ends of the first assembly cavity respectively penetrate through the inner side wall and the bottom surface of the assembly cylinder. A number of second assembly cavities are arranged inside the adjustment cylinder. The top of the second assembly cavity penetrates through the top surface of the adjustment cylinder. The positions of the number of the insertion rods, the number of the first assembly cavities and the number of the second assembly cavities correspond to each other. The first end of the insertion rod is fixedly connected with the annular plate, and the second end of the insertion rod passes through the first assembly cavity and extends into the second assembly cavity; A third electric telescopic rod is fixedly arranged on the inner top surface of the assembly cylinder. The output end of the third electric telescopic rod faces downward and is fixedly connected with one of the insertion rods.

7. The fracturing device for shale oil development according to claim 1, characterized in that A protrusion is arranged at the top of the outer side wall of the hollow drill pipe. The inside of the protrusion is communicated with the inside of the hollow drill pipe. The protrusion is in a circular ring structure, and a number of feed holes are arranged on the top surface and the bottom surface of the protrusion; The first conveying assembly further includes: A material distributing sleeve, the protruding part is arranged inside the material distributing sleeve, the central axes of the material distributing sleeve, the hollow drill pipe and the protruding part are collinear, a feeding channel is jointly formed between the inner side wall of the material distributing sleeve, the outer side wall of the protruding part and the outer side wall of the hollow drill pipe, there are two material extracting devices, which are respectively arranged at both ends of the top of the storage barrel, the discharging ends of the two material extracting devices are both communicated with the feeding channel, the material distributing sleeve is connected to the output end of the first driving assembly, and the first driving assembly can drive the material distributing sleeve to move in the vertical direction; Two blocking assemblies are respectively fixedly arranged at the centers of the outer top surface and the outer bottom surface of the material distributing sleeve.

8. The fracturing device for shale oil development according to claim 7, wherein The blocking assembly includes: A receiving ring, the receiving ring is fixedly connected to the material distributing sleeve, the receiving ring is collinear with the central axis of the hollow drill pipe, and an annular receiving groove is arranged on the inner side wall of the receiving ring; An annular airbag is arranged in the annular receiving groove and is fixedly connected to the receiving ring; An elastic sealing ring is fixedly arranged on the side wall of the annular airbag close to the hollow drill pipe, and there is a gap between the elastic sealing ring and the outer side wall of the hollow drill pipe; A pressure regulator is fixedly arranged on the outer side wall of the material distributing sleeve, and the output end of the pressure regulator is communicated with the inside of the annular airbag.

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