A horizontal well volume fracturing apparatus and method of use thereof

Abstract

The present application relates to the technical fields of oil and gas exploitation, and discloses a horizontal well volume fracturing equipment and a use method thereof, which comprises a coiled tubing, a connector, a centralizer, an ejector, a packer and a guide are sequentially connected and installed at a horizontal operation end of the coiled tubing, the ejector comprises an ejector shell pipe, an assembly joint and a connecting end head are sequentially installed at front and rear ends of the ejector shell pipe, and the three parts jointly form a fracturing inner cavity, and a multilayer sliding sleeve mechanism is installed in the fracturing inner cavity; the horizontal well volume fracturing equipment can adjust the spraying range through the multilayer sliding sleeve mechanism, the multilayer sliding sleeve structure and the limiting control structure, conventional spraying structures are immediately all connected and communicate to spray fracturing fluid after the sliding sleeve is cancelled, the spraying range cannot be adjusted, and thus hidden dangers and difficulties exist under part of operation requirements.

Description

Technical Field

[0001] This invention relates to the technical field of oil and gas extraction, specifically to a horizontal well volumetric fracturing device and its usage method. Background Technology

[0002] With the development of science and technology, the oil and gas extraction industry can now use coiled tubing to perform volumetric fracturing operations in horizontal wells. This allows natural fractures to expand continuously and brittle rocks to undergo shearing and slippage, creating a fracture network where natural and artificial fractures intersect. This increases the volume of fracturing, improves initial production and final recovery rate. However, existing in-well volumetric fracturing equipment typically uses fracturing balls to push sliding sleeves to connect fracturing nozzles and create fractures. In actual use, this method suffers from low efficiency and the inability to change the nozzle orientation and the fixed number of nozzles opened can lead to repeated fracturing outputs with roughly the same force point, thus affecting the fracturing effect and efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a horizontal well volumetric fracturing device and its usage method to overcome the above-mentioned defects in the prior art.

[0004] The present invention is achieved through the following technical solution.

[0005] This invention discloses a horizontal well volumetric fracturing device, comprising coiled tubing. A connector, a centralizer, an injector, a packer, and a guide are sequentially connected and installed at the horizontal working end of the coiled tubing. The injector includes an injection shell, and assembly joints and connecting ends are sequentially installed at the front and rear ends of the injection shell, together forming a fracturing cavity. A multi-layer sliding sleeve mechanism is installed within the fracturing cavity. The multi-layer sliding sleeve mechanism includes a control platform fixed to the rear end of the fracturing cavity and a sliding sleeve slidably disposed at the front end of the control platform. An array of injection holes is provided at the outer end of the injection shell, and an array of phase... The system includes an equal number of nozzle mounting cavities and a corresponding rotation control structure. A fracturing nozzle is rotatably mounted within each nozzle mounting cavity. The output end of the fracturing nozzle has an elongated injection port embedded within the injection hole. A control platform and a sliding sleeve are slidably connected, with corresponding adjustment grooves. The input end of the fracturing nozzle is connected to the adjustment groove via a groove on the rear side of the nozzle mounting cavity. A sliding cover plate with a cover limiting portion is slidably mounted in an array within the adjustment groove on the sliding sleeve. The control platform has a limiting control structure within the adjustment groove for controlling the sliding movement of the corresponding sliding cover plate.

[0006] The rotation control structure includes a nozzle adjustment chamber disposed on the side wall of the nozzle mounting cavity. The fracturing nozzle has sealing rings at both the front and rear ends of the housing portion inside the nozzle adjustment chamber. A piston baffle is disposed on the outer wall of the fracturing nozzle. The piston baffle is slidably disposed in the nozzle adjustment chamber. A reset spring is supported and installed at the front end of the piston baffle. A pressure relief valve and a pressure relief channel structure are disposed in the nozzle adjustment chamber. An adjustment control channel is arrayed on the inner wall of the control platform. An adjustment solenoid valve is connected to the adjustment control channel. One end of the adjustment control channel is connected to the fracturing cavity, and the other end of the adjustment control channel is connected to the corresponding nozzle adjustment chamber.

[0007] The limit control structure includes a transmission slide groove disposed within the control platform. The transmission slide groove is disposed at the bottom of the control platform and the adjustment groove. An electromagnet is fixedly installed in the transmission slide groove, and a permanent magnet slider is slidably installed in the transmission slide groove. A limit plate is installed at the front end of the permanent magnet slider and a spring is installed in cooperation with it. The end of the limit plate protrudes from the end of the transmission slide groove and is placed on the bottom platform of the adjustment groove.

[0008] In a further technical solution, the rear end of the sliding sleeve is provided with an array of embedded sliding grooves on the outer wall of the corresponding part of the adjustment groove, the sliding cover is slidably disposed in the embedded sliding groove, the rear side of the embedded sliding groove is provided with an embedded groove, the rear side of the sliding cover is provided with a sliding embedding block, the sliding embedding block is slidably disposed in the embedded groove and is fitted with a support spring.

[0009] In a further technical solution, the top of the sliding cover can be engaged and locked in place by the cover body limiting part, and the initial position of the sliding cover is on the upper side of the mounting groove, and there is a gap at its bottom for the limiting plate to be inserted and locked in place.

[0010] In a further technical solution, the outer wall of the sliding sleeve is provided with a piston slider portion, the inner cavity of the fracturing cavity is provided with a pressure sliding cavity, and the piston slider portion is slidably disposed in the pressure sliding cavity.

[0011] In a further technical solution, the inner wall of the injection shell tube is symmetrically provided with a sliding sleeve control channel. One end of the sliding sleeve control channel is connected to the fracturing cavity, and the other end of the sliding sleeve control channel is connected to the rear side of the pressure sliding cavity. A sliding sleeve solenoid valve is installed in the sliding sleeve control channel, and the sliding sleeve solenoid valve is used to control the opening and closing of the sliding sleeve control channel.

[0012] In a further technical solution, a platform fixing groove is provided at the rear end of the fracturing cavity, and the control platform is embedded and fixed in the platform fixing groove. A control unit is embedded and fixedly installed in an array on the inner wall of the control platform. The control unit includes a control power supply, a control circuit board, and a command receiving and control module.

[0013] In a further technical solution, the assembly joint is provided with an installation groove, and an instruction controller for instruction control and communication transmission is embedded and fixedly installed in the installation groove. The instruction controller includes a power module, a control circuit, a communication transmission module, an instruction module, and a control sensing module.

[0014] A method for using a horizontal well volumetric fracturing device:

[0015] (1) Drilling: The coiled tubing and its connected structural pushing device are controlled by the ground equipment to the designated well section position, and the depth is finely adjusted according to the positioner and counter so that the position of the injection hole of the injector corresponds to the perforation point;

[0016] (2) Separation: The packer is activated to set the seal and isolate the coiled tubing, and the inlet and pressure booster valve are opened.

[0017] (3) Injection range adjustment: The ground controller sends a command to the command controller. The command receiving module of the inter-controller receives binary data to determine the command type. The fracturing nozzle can be turned on and off during operation by controlling the fracturing nozzle and its corresponding limit plate and sliding cover. The electromagnet is energized by the command to push the limit plate out and lock it under the corresponding sliding cover. So when the operation starts and the sliding sleeve slides, the current sliding cover is still covered on the input end of the fracturing nozzle to achieve the blocking effect. The injection range can be adjusted by controlling the on and off of multiple sets of fracturing nozzles.

[0018] (4) Injection nozzle direction adjustment: The ground controller sends a command to the command controller, and the command type is determined by the inter-controller. By controlling the opening and closing of the solenoid valve, the pressure is input from the adjustment control channel to the nozzle adjustment chamber, which pushes the piston baffle to drive the fracturing nozzle to rotate. This can adjust the injection nozzle direction of the long strip injection nozzle at the outer end of the fracturing nozzle. It is suitable for adjusting the direct action point of fracturing to improve fracturing efficiency and range.

[0019] (5) Fracturing: Open the switch valve and the burst valve, inject fracturing fluid from the inlet of the coiled tubing, and then send a command to the command controller through the ground controller to make the sliding sleeve solenoid valve connected. The pressure is pushed from the sliding sleeve control channel to the pressure sliding cavity to push the piston slider part and drive the sliding sleeve to slide down. At this time, the sliding sleeve slides down relative to the control panel and drives the sliding cover plate that is not fixed to slide down together, so that the inlet of the rear end of the fracturing nozzle and the corresponding control groove are exposed and connected. At the moment of connection, the fracturing fluid is output from the long strip injection port of the fracturing nozzle along the fixed injection port to complete the fracturing operation at the current location.

[0020] (6) Adjust the position of the coiled tubing and repeat steps 2, 3, 4 and 5 until fracturing operations are completed at all construction locations.

[0021] The beneficial effects of this invention are:

[0022] The present invention discloses a horizontal well volumetric fracturing device. Through the setting of a multi-layer sliding sleeve structure in the multi-layer sliding sleeve mechanism, it is possible to achieve the following during use: the ground controller sends a command to the command controller, which connects the sliding sleeve solenoid valve. The pressure is pushed from the sliding sleeve control channel to the pressure sliding cavity, which pushes the piston slider part and causes the sliding sleeve to slide downward. At this time, the sliding sleeve slides downward relative to the control platform and drives the sliding cover plate that is not fixed to the position to slide downward together, thereby controlling the connection and blocking protection of the fracturing nozzle. It can achieve precise control and continuous fracturing operation, thereby greatly improving the efficiency of fracturing operation.

[0023] The invention relates to a horizontal well volumetric fracturing device. Through a multi-layer sliding sleeve mechanism combined with a limit control structure, the injection range can be adjusted. Conventional injection structures, where multiple injection nozzles immediately connect to inject fracturing fluid after the sliding sleeve is released from its blocking state, do not allow for adjustment of the injection range, leading to potential hazards and difficulties in certain operational scenarios. In this device, a ground controller sends commands to a command controller. The command receiving module at the inter-controller terminal receives binary data to determine the command type. By controlling the fracturing nozzle and its corresponding limit plate and sliding cover, the fracturing nozzle can be switched on and off during operation. A command controls an electromagnet to energize and push the limit plate out, locking it under the corresponding sliding cover. Thus, when the sliding sleeve slides to initiate operation, the current sliding cover remains positioned behind the fracturing nozzle, achieving a blocking effect. The injection range can be adjusted by controlling the on / off state of multiple fracturing nozzles.

[0024] The invention relates to a horizontal well volumetric fracturing device. Through a multi-layer sliding sleeve mechanism combined with a rotation control structure, the direction of the injection nozzle can be adjusted. Conventional injectors use through holes or fixed injection pipes, resulting in a limited injection range and action point during fracturing operations. This makes it unsuitable for specific perforation locations and restricts the applicable scope of the operation. In this device, a ground controller sends a command to the command controller, which determines the command type. By controlling the opening and closing of the solenoid valve, pressure is input from the control channel to the nozzle rotation chamber, pushing the piston baffle and rotating the fracturing nozzle. This allows adjustment of the injection nozzle direction at the long, narrow injection port at the outer end of the fracturing nozzle, suitable for adjusting the direct point of action in fracturing to improve fracturing efficiency and range. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 yes Figure 1 Schematic diagram of the structure of the central injector 15;

[0029] Figure 3 yes Figure 2 Enlarged structural diagram at point A;

[0030] Figure 4 yes Figure 2 A schematic diagram showing the configuration of the central injection hole 34;

[0031] Figure 5 yes Figure 3 Schematic diagram of the installation structure of the intermediate-pressure fracturing nozzle 42; Detailed Implementation

[0032] The following is combined with Figure 1-5 The present invention will be described in detail below. For ease of description, the directions referred to below are defined as follows: the directions of up, down, left, right, front, and back mentioned below are the same as... Figure 1 The directions of the projection relationship are consistent in all directions: up, down, left, right, front, and back.

[0033] A horizontal well volumetric fracturing device, as described in Figures 1-5, includes a coiled tubing 11. A connector 12, a centralizer 13, an injector 15, a packer 16, and a guide 17 are sequentially connected and installed at the horizontal working end of the coiled tubing 11. The injector 15 includes an injection shell 22. Assembly joints 23 and connecting ends 21 are sequentially installed at the front and rear ends of the injection shell 22, and these three components together form a fracturing cavity 30. A multi-layer sliding sleeve mechanism 10 is installed within the fracturing cavity 30. The multi-layer sliding sleeve mechanism 10 includes a control platform 36 fixed to the rear end of the fracturing cavity 30 and a sliding sleeve 31 slidably disposed at the front end of the control platform 36. An array of injection holes 34 is provided at the outer end of the injection shell 22. The control console 36 array has an equal number of nozzle mounting cavities 40 and a matching rotation control structure. A fracturing nozzle 42 is rotatably and adjustablely mounted in the nozzle mounting cavity 40. The output end of the fracturing nozzle 42 has an elongated injection port 52 and is embedded in the injection hole 34. The control console 36 and the sliding sleeve 31 are slidably connected and the corresponding part is provided with an adjustment groove 47. The input end of the fracturing nozzle 42 is connected to the adjustment groove 47 through the groove on the rear side of the nozzle mounting cavity 40. The sliding sleeve 31 is slidably mounted in the adjustment groove 47 with a sliding cover plate 45 having a cover limiting part 46. The control console 36 is provided with a limiting control structure in the adjustment groove 47 for controlling the sliding of the corresponding sliding cover plate 45.

[0034] Preferably, the rotation control structure includes a nozzle adjustment chamber 41 disposed on the side wall of the nozzle mounting cavity 40. The fracturing nozzle 42 has sealing rings at both the front and rear ends of the housing inside the nozzle adjustment chamber 41. The outer wall of the fracturing nozzle 42 is provided with a piston baffle 43, which is slidably disposed in the nozzle adjustment chamber 41. A reset spring is supported and installed at the front end of the piston baffle 43, and a pressure relief valve and pressure relief channel structure are provided in the nozzle adjustment chamber 41. The inner wall of the control platform 36 is provided with an array of adjustment control channels 39. An adjustment solenoid valve 38 is connected to the adjustment control channels 39. One end of the adjustment control channels 39 is connected to the fracturing cavity 30, and the other end of the adjustment control channels 39 is connected to the corresponding nozzle adjustment chamber 41.

[0035] Preferably, the limit control structure includes a transmission slide 51 disposed in the control base 36. The transmission slide 51 is disposed at the bottom part of the control base 36 and the regulating groove 47. An electromagnet 53 is fixedly installed in the transmission slide 51. A permanent magnet slider 62 is slidably installed in the transmission slide 51. A limit plate 50 is installed at the front end of the permanent magnet slider 62 and a spring is installed in cooperation. The end of the limit plate 50 extends out of the transmission slide 51 and is placed on the bottom platform of the regulating groove 47.

[0036] Preferably, the outer wall of the sliding sleeve 31 corresponding to the adjustment groove 47 is provided with an embedded sliding groove 44, the sliding cover plate 45 is slidably disposed in the embedded sliding groove 44, the rear side of the embedded sliding groove 44 is provided with an embedded groove, the rear side of the sliding cover plate 45 is provided with a sliding embedding block 48, the sliding embedding block 48 is slidably disposed in the embedded groove and is fitted with a support spring 49.

[0037] Preferably, the top of the sliding cover 45 can be locked in place by the cover limiting part 46, and the initial position of the sliding cover 45 is on the upper side of the mounting groove 44, and there is a gap at its bottom for the limiting plate 50 to be inserted and locked in place.

[0038] Preferably, the outer wall of the sliding sleeve 31 is provided with a piston slider part 33, and the groove of the fracturing inner cavity 30 is provided with a pressure sliding cavity 32, and the piston slider part 33 is slidably disposed in the pressure sliding cavity 32.

[0039] Preferably, the inner wall of the injection shell tube 22 is symmetrically provided with a sliding sleeve control channel 27. One end of the sliding sleeve control channel 27 is connected to the fracturing cavity 30, and the other end of the sliding sleeve control channel 27 is connected to the rear side of the pressure sliding cavity 32. A sliding sleeve solenoid valve 28 is installed in the sliding sleeve control channel 27, and the sliding sleeve solenoid valve 28 is used to control the opening and closing of the sliding sleeve control channel 27.

[0040] Preferably, the rear end of the fracturing cavity 30 is provided with a base fixing groove 35, and the control base 36 is embedded and fixed in the base fixing groove 35. The control unit 37 is embedded and fixedly installed in an array on the inner wall of the control base 36. The control unit 37 includes a control power supply, a control circuit board, and a command receiving control module.

[0041] Preferably, the assembly connector 23 is provided with a mounting groove 24, and a command controller 25 for command control and communication transmission is embedded and fixedly installed in the mounting groove 24. The command controller 25 includes a power supply module, a control circuit, a communication transmission module, a command module, and a control sensing module.

[0042] This invention also includes a method of using a horizontal well volumetric fracturing device:

[0043] (1) Drilling: The coiled tubing and its connected structural pushing device are controlled by the ground equipment to the designated well section position, and the depth is finely adjusted according to the positioner and counter so that the position of the injection hole 34 of the injector 15 corresponds to the perforation point.

[0044] (2) Separation: The sealing is initiated by the packer 16, and the inlet of the coiled tubing and the pressure booster valve are opened;

[0045] (3) Injection range adjustment: The ground controller sends a command to the command controller 25. The command receiving control module of the inter-controller 37 receives binary data to determine the command type. By controlling the fracturing nozzle 42 and its corresponding limit plate 50 and sliding cover plate 45, the fracturing nozzle 42 can be turned on and off during operation. By controlling the electromagnet 53 to be energized, the limit plate 50 is pushed out and locked under the corresponding sliding cover plate 45. So when the operation starts and the sliding sleeve 31 slides, the current sliding cover plate 45 still stays on the input end of the rear side of the fracturing nozzle 42 to achieve the blocking effect. The injection range can be adjusted by controlling the on and off of multiple sets of fracturing nozzles 42.

[0046] (4) Injection nozzle direction adjustment: The ground controller sends a command to the command controller 25, and the command type is determined by the inter-controller 37. By controlling the opening and closing of the solenoid valve 38, the pressure is input from the adjustment control channel 39 to the nozzle adjustment chamber 41, which pushes the piston baffle 43 to drive the fracturing nozzle 42 to rotate. This can adjust the injection nozzle direction of the long strip injection port 52 at the outer end of the fracturing nozzle 42. It is suitable for adjusting the direct action point of fracturing to improve fracturing efficiency and range.

[0047] (5) Fracturing: Open the switch valve and the burst valve, inject fracturing fluid from the inlet of the coiled tubing, and then send a command to the command controller 25 through the ground controller to make the sliding sleeve solenoid valve 28 connected. The pressure is pushed from the sliding sleeve control channel 27 to the pressure sliding cavity 32 to push the piston slider 33 and drive the sliding sleeve 31 to slide down. At this time, the sliding sleeve 31 slides down relative to the control table 36 and drives the sliding cover plate 45, which is not fixed, to slide down together, so that the rear input port of the fracturing nozzle 42 and the corresponding control groove 47 are exposed and connected. At the moment of connection, the fracturing fluid is output from the long strip injection port 52 end of the fracturing nozzle 42 along the fixed injection port to complete the fracturing operation at the current location.

[0048] (6) Adjust the position of the coiled tubing and repeat steps 2, 3, 4, and 5 until fracturing operations are completed at all construction positions.

[0049] The beneficial effects of this invention are:

[0050] The horizontal well volumetric fracturing device of the present invention, through the setting of a multi-layer sliding sleeve structure in the multi-layer sliding sleeve mechanism 10, can realize that during use, the ground controller sends a command to the command controller 25 to connect the sliding sleeve solenoid valve 28. The pressure is pushed from the sliding sleeve control channel 27 to the pressure sliding cavity 32 to push the piston slider part 33 to drive the sliding sleeve 31 to slide downward. At this time, the sliding sleeve 31 slides downward relative to the control platform 36 and drives the sliding cover plate 45, which is not fixed in place, to slide downward together, thereby controlling the connection and blocking protection of the fracturing nozzle 42. It can achieve precise control and continuous fracturing operation, thereby greatly improving the efficiency of fracturing operation.

[0051] The invention relates to a horizontal well volumetric fracturing device. Through a multi-layer sliding sleeve mechanism 10, the multi-layer sliding sleeve structure, combined with a limit control structure, allows for adjustment of the injection range. Conventional injection structures, where multiple injection ports immediately connect to inject fracturing fluid after the sliding sleeve is unblocked, do not allow for adjustment of the injection range, leading to potential hazards and difficulties in certain operational scenarios. In this device, a ground controller sends commands to a command controller 25. The command receiving module at the inter-controller 37 receives binary data to determine the command type. By controlling the fracturing nozzle 42 and its corresponding limit plate 50 and sliding cover 45, the fracturing nozzle 42 can be opened and closed during operation. A command controls the energization of an electromagnet 53, pushing the limit plate 50 out and locking it under the corresponding sliding cover 45. Thus, when the sliding sleeve 31 slides during operation, the current sliding cover 45 remains covering the input end of the fracturing nozzle 42, achieving a blocking effect. The injection range can be adjusted by controlling the opening and closing of multiple sets of fracturing nozzles 42.

[0052] The invention relates to a horizontal well volumetric fracturing device. Through a multi-layer sliding sleeve mechanism 10, a multi-layer sliding sleeve structure combined with a rotation control structure allows for adjustment of the injection nozzle direction. Conventional injectors use through-holes or fixed injection pipes, resulting in a limited injection range and action point during fracturing operations. This makes it unsuitable for specific perforation locations and restricts the applicable scope of the operation. In this device, a command is sent from the ground controller to the command controller 25. The command type is determined by the inter-controller 37, and the opening and closing of the solenoid valve 38 is controlled. This allows pressure to be input through the control channel 39 into the nozzle rotation chamber 41, pushing the piston baffle 43 and rotating the fracturing nozzle 42. This allows adjustment of the injection nozzle direction of the long strip injection port 52 at the outer end of the fracturing nozzle 42, suitable for adjusting the direct action point of fracturing to improve fracturing efficiency and range.

[0053] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand and implement the present invention. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A horizontal well volumetric fracturing device, comprising coiled tubing, wherein a connector, a centralizer, an injector, a packer, and a guide are sequentially connected and installed at the horizontal working end of the coiled tubing, characterized in that: The injector includes an injection shell tube. Assembly joints and connecting ends are sequentially installed at the front and rear ends of the injection shell tube, and these three components together form a fracturing cavity. A multi-layer sliding sleeve mechanism is installed within the fracturing cavity. The multi-layer sliding sleeve mechanism includes a control platform fixed to the rear end of the fracturing cavity and a sliding sleeve slidably disposed at the front end of the control platform. An array of injection holes is provided at the outer end of the injection shell tube. An array of the control platform is provided with the same number of nozzle mounting cavities and a corresponding rotation control structure. A fracturing nozzle is rotatably and adjustablely installed within each nozzle mounting cavity. The output end of the fracturing nozzle is provided with an elongated injection port embedded within the injection hole. A control groove is provided at the corresponding slidable connection between the control platform and the sliding sleeve. The input end of the fracturing nozzle is connected to the control groove through a groove on the rear side of the nozzle mounting cavity. A sliding cover plate with a cover limiting portion is slidably installed in an array within the control groove on the sliding sleeve. A limiting control structure for controlling the sliding movement of the corresponding sliding cover plate is provided within the control groove on the control platform. The rotation control structure includes a nozzle adjustment chamber disposed on the side wall of the nozzle mounting cavity. The fracturing nozzle has sealing rings at both the front and rear ends of the housing portion inside the nozzle adjustment chamber. A piston baffle is disposed on the outer wall of the fracturing nozzle. The piston baffle is slidably disposed in the nozzle adjustment chamber. A reset spring is supported and installed at the front end of the piston baffle. A pressure relief valve and a pressure relief channel structure are disposed in the nozzle adjustment chamber. An adjustment control channel is arrayed on the inner wall of the control platform. An adjustment solenoid valve is connected to the adjustment control channel. One end of the adjustment control channel is connected to the fracturing cavity, and the other end of the adjustment control channel is connected to the corresponding nozzle adjustment chamber. The limit control structure includes a transmission slide groove disposed within the control platform. The transmission slide groove is disposed at the bottom of the control platform and the adjustment groove. An electromagnet is fixedly installed in the transmission slide groove, and a permanent magnet slider is slidably installed in the transmission slide groove. A limit plate is installed at the front end of the permanent magnet slider and a spring is installed in cooperation with it. The end of the limit plate protrudes from the end of the transmission slide groove and is placed on the bottom platform of the adjustment groove.

2. The horizontal well volumetric fracturing equipment according to claim 1, characterized in that: The rear end of the sliding sleeve is provided with an array of embedded sliding grooves on the outer wall of the corresponding part of the adjustment groove. The sliding cover plate is slidably disposed in the embedded sliding groove. An embedded groove is provided on the rear side of the embedded sliding groove. A sliding embedding block is provided on the rear side of the sliding cover plate. The sliding embedding block is slidably disposed in the embedded groove and is fitted with a support spring.

3. The horizontal well volumetric fracturing equipment according to claim 2, characterized in that: The top of the sliding cover can be locked in place by the limiting part of the cover body. The initial position of the sliding cover is on the upper side of the mounting groove and there is a gap at its bottom for the limiting plate to be inserted and locked in place.

4. The horizontal well volumetric fracturing equipment according to claim 1, characterized in that: The outer wall of the sliding sleeve is provided with a piston slider part, and the inner cavity of the fracturing cavity is provided with a pressure sliding cavity, and the piston slider part is slidably disposed in the pressure sliding cavity.

5. A horizontal well volumetric fracturing device according to claim 4, characterized in that: The inner wall of the injection shell tube is symmetrically provided with sliding sleeve control channels. One end of the sliding sleeve control channel is connected to the fracturing cavity, and the other end is connected to the rear side of the pressure sliding cavity. A sliding sleeve solenoid valve is installed in the sliding sleeve control channel to control the opening and closing of the sliding sleeve control channel.

6. A horizontal well volumetric fracturing device according to claim 1, characterized in that: The rear end of the fracturing cavity is provided with a base fixing groove, and the control base is embedded and fixed in the base fixing groove. The control unit is embedded and fixedly installed in an array on the inner wall of the control base. The control unit includes a control power supply, a control circuit board, and a command receiving control module.

7. A horizontal well volumetric fracturing device according to claim 1, characterized in that: The assembly joint is provided with an installation groove, in which an instruction controller for command control and communication transmission is embedded and fixedly installed. The instruction controller includes a power module, a control circuit, a communication transmission module, an instruction module, and a control sensing module.

8. A method of using the horizontal well volumetric fracturing equipment according to any one of claims 1-7, characterized in that: include: (1) Drilling: The coiled tubing and its connected structural pushing device are controlled by the ground equipment to the designated well section position, and the depth is finely adjusted according to the positioner and counter so that the position of the injection hole of the injector corresponds to the perforation point; (2) Separation: The packer is activated to set the seal and isolate the coiled tubing, and the inlet and pressure booster valve are opened. (3) Injection range adjustment: The ground controller sends a command to the command controller. The command receiving module of the inter-controller receives binary data to determine the command type. The fracturing nozzle can be turned on and off during operation by controlling the fracturing nozzle and its corresponding limit plate and sliding cover. The electromagnet is energized by the command to push the limit plate out and lock it under the corresponding sliding cover. So when the operation starts and the sliding sleeve slides, the current sliding cover is still covered on the input end of the fracturing nozzle to achieve the blocking effect. The injection range can be adjusted by controlling the on and off of multiple sets of fracturing nozzles. (4) Injection nozzle direction adjustment: The ground controller sends a command to the command controller, and the command type is determined by the inter-controller. By controlling the opening and closing of the solenoid valve, the pressure is input from the adjustment control channel to the nozzle adjustment chamber, which pushes the piston baffle to drive the fracturing nozzle to rotate. This can adjust the injection nozzle direction of the long strip injection nozzle at the outer end of the fracturing nozzle. It is suitable for adjusting the direct action point of fracturing to improve fracturing efficiency and range. (5) Fracturing: Open the switch valve and the burst valve, inject fracturing fluid from the inlet of the coiled tubing, and then send a command to the command controller through the ground controller to make the sliding sleeve solenoid valve connected. The pressure is pushed from the sliding sleeve control channel to the pressure sliding cavity to push the piston slider part and drive the sliding sleeve to slide down. At this time, the sliding sleeve slides down relative to the control panel and drives the sliding cover plate that is not fixed to slide down together, so that the inlet of the rear end of the fracturing nozzle and the corresponding control groove are exposed and connected. At the moment of connection, the fracturing fluid is output from the long strip injection port of the fracturing nozzle along the fixed injection port to complete the fracturing operation at the current location. (6) Adjust the position of the coiled tubing and repeat steps 2, 3, 4 and 5 until fracturing operations are completed at all construction locations.

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