An electric control sliding sleeve cementing and fracturing tool

Abstract

The present invention provides an electric control sliding sleeve cementing and fracturing tool, which comprises an upper sub (4), a sliding sleeve (3) and a lower sub (1) connected in sequence. A sleeve (2) is sleeved outside the sliding sleeve (3), and a fracturing fluid discharge through hole (201) is arranged on the sleeve (2). An axial channel (12) is arranged inside the electric control sliding sleeve cementing and fracturing tool. The electric control sliding sleeve cementing and fracturing tool further comprises a pressure sensor (10), a control unit (9) and an electric control switch assembly connected in sequence. The pressure sensor (10) can detect the pressure value inside the axial channel (12) in real time and send it to the control unit (9). When the control unit (9) receives a pressure opening signal, the control unit (9) causes the electric control sliding sleeve cementing and fracturing tool to change from a closed state to an open state. This electric control sliding sleeve cementing and fracturing tool can control the opening of the sliding sleeve by receiving a preset pressure signal, and achieve opening under accurate pressure and accurate time.

Description

Technical Field

[0001] The present invention relates to the technical field of oil extraction equipment, and specifically to an electric control sliding sleeve cementing and fracturing tool. Background Art

[0002] At present, domestic oilfields often use hydraulic fracturing to increase production for low-permeability reservoirs. The principle of hydraulic fracturing is to inject high-energy pressurized fracturing fluid into a reservoir, which can improve the extraction rate and ultimate recovery rate of hydrocarbons. Since the 1960s, this technology has been widely used in the stimulation operations of oil and gas fields in China, and the related supporting equipment for fracturing operations has since been widely developed and popularized. Among them, the cementing sliding sleeve, an effective tool for horizontal well staged fracturing and acidizing technology, has become the latest development trend.

[0003] With the gradual deepening of China's natural gas exploration and development into unconventional oil and gas reservoir fields such as tight sandstone gas, shale gas, and coalbed methane, increasing the single-well production has become the primary goal of current development. After decades of development, horizontal wells have been drilled in various lithologic oil and gas reservoirs in China, and various horizontal well completion methods have been adopted. Coiled tubing perforation operation (TCP) is usually applied to horizontal well completion operations. However, as the depth of horizontal wells gradually increases, in order to reduce the risk and cost of the first-stage perforation operation of coiled tubing, the application of toe-end sliding sleeve technology will gradually increase with this trend. The toe-end sliding sleeve is connected to the production casing and is run into the well as part of the casing string. After cementing, the casing can be pressure tested, the sliding sleeve is opened, the first-stage fracturing is completed, and a pumping flow path is provided for subsequent bridge plug perforation connection operations, thus eliminating the expensive coiled tubing perforation cost. Currently, most of the fracturing operations in oil and gas fields are in the environment of horizontal oil well open-hole multi-stage fracturing, and full wellbore pressure testing is not required. In the cementing environment, the cement slurry is likely to enter the hydraulic chamber through the pressure transmission holes, affecting the opening of the sliding sleeve. The sliding sleeve cannot be opened normally, causing accidents, with a certain degree of risk. And due to the instability of the shear value of the shear pin of the sliding sleeve, it is also easy to cause the sliding sleeve not to open or to open prematurely. After the shear pin of the sliding sleeve is sheared, the sliding sleeve moves downward, instantly releasing high pressure, and the surging pressure in the pipe string is large, which is easy to cause the pipe string to move, affecting the sealing of the packer in the pipe string. The second-generation toe-end sliding sleeve has been improved by using a rupture disk to replace the shear pin and adding a delay valve for delayed opening, effectively solving the above problems. However, the quality of each batch of rupture disks is different, the cost is high, and it is difficult to detect, and it cannot accurately reach the designed opening pressure. And the requirements for the delay time of the delay valve, the viscosity and cleanliness of the hydraulic oil are strict, which is easy to cause premature or slow opening. Seriously, a little impurity in the hydraulic oil can block the delay valve and prevent the sliding sleeve from opening, with poor stability. Summary of the Invention

[0004] To solve the problem that the sliding sleeve in the existing fracturing tools is not easy to control, the present invention provides an electric control sliding sleeve cementing and fracturing tool. The electric control sliding sleeve cementing and fracturing tool includes an electronic intelligent control system, which can control the opening of the sliding sleeve by receiving a preset pressure signal. Before opening, the wellbore can be pressure tested to achieve opening at an accurate pressure and accurate time. It can still work normally after being left in the well for 6 to 12 months.

[0005] The technical solution adopted by the present invention to solve its technical problems is: an electric control sliding sleeve cementing and fracturing tool, including an upper joint, a sliding sleeve and a lower joint connected in sequence. A sleeve is sleeved outside the sliding sleeve, and a fracturing fluid discharge through hole is provided on the sleeve. An axial channel is provided inside the electric control sliding sleeve cementing and fracturing tool, and the sleeve blocks the communication between the axial channel and the fracturing fluid discharge through hole. The electric control sliding sleeve cementing and fracturing tool further includes a pressure sensor, a control unit and an electric control switch assembly connected in sequence. The pressure sensor can detect the pressure value in the axial channel in real time and send it to the control unit; when the control unit receives a pressure opening signal, the control unit can control the axial movement of the sliding sleeve through the electric control switch assembly and make the axial channel communicate with the fracturing fluid discharge through hole.

[0006] The lower part of the sleeve is fixedly sleeved outside the upper part of the lower joint, and the pressure sensor, the control unit and the electric control switch assembly are all located between the sleeve and the lower joint.

[0007] A pressure measuring hole is provided in the side wall of the lower joint. The pressure sensor is fixedly connected to the lower joint, and the pressure sensor measures the pressure in the axial channel through the pressure measuring hole. The pressure opening signal is a pulse pressure opening signal or a pressure threshold pressure maintaining opening signal.

[0008] An installation groove is provided outside the upper part of the lower joint. The control unit is connected with a power supply unit, and the pressure sensor, the control unit and the power supply unit are all located in this installation groove.

[0009] The electric control switch assembly includes a motor, a pull rod and a sealing shaft connected in sequence. The motor, the pull rod, the sealing shaft and the sliding sleeve are arranged in sequence along the axis. The motor is connected to the control unit, and the motor can make the sealing shaft move axially through the pull rod.

[0010] The side wall of the lower joint contains a radial connection hole and an axial connection hole connected in sequence. The sealing shaft is located in the axial connection hole, and the sealing shaft is sealingly connected to the axial connection hole. The inside of the lower joint can be communicated with the outside of the lower joint through the radial connection hole and the axial connection hole in sequence.

[0011] When the electric control sliding sleeve cementing and fracturing tool is in the closed state, the lower end of the sliding sleeve is sleeved outside the upper end of the lower joint, the sliding sleeve is hermetically connected with the lower joint, and the sealing shaft seals the axial connection channel; during the process of the electric control sliding sleeve cementing and fracturing tool changing from the closed state to the open state, the seal moves axially away from the sliding sleeve, and the pressure fluid in the axial channel can sequentially pass through the radial connection channel and the axial connection channel to push the sliding sleeve to move away from the lower joint; when the electric control sliding sleeve cementing and fracturing tool is in the open state, the sliding sleeve disengages from the lower joint, and the fracturing fluid in the axial channel can be discharged through the fracturing fluid discharge through hole.

[0012] The upper end of the sliding sleeve is sleeved inside the lower end of the upper joint, the sliding sleeve is hermetically connected with the upper joint, an outer circlip groove is arranged outside the upper end of the sliding sleeve, and an inner circlip groove is arranged inside the upper joint. When the electric control sliding sleeve cementing and fracturing tool is in the closed state, the positions of the outer circlip groove and the inner circlip groove are staggered, and the outer circlip groove contains a circlip; when the electric control sliding sleeve cementing and fracturing tool is in the open state, the positions of the outer circlip groove and the inner circlip groove correspond to each other, and the outer circlip groove and the inner circlip groove are connected by the circlip.

[0013] A plurality of fracturing fluid discharge through holes are arranged circumferentially along the sleeve, the fracturing fluid discharge through holes are located between the upper joint and the lower joint, and the sliding sleeve is hermetically connected with the sleeve.

[0014] The upper end of the sleeve is threadedly connected with the upper joint, the lower end of the sleeve is threadedly connected with the lower joint, and the sleeve and the sliding sleeve are connected by shear pins.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. The electric control sliding sleeve cementing and fracturing tool is lowered into the well in one trip along with the tubing, and the fracturing operation is completed in one trip, eliminating the perforation operation, saving operation time and operation risks; no additional packer is required for layer clamping, saving costs; no hanging packer is needed, and the tubing is directly connected back to the wellhead. After the fracturing is completed, the tubing remains full-bore, facilitating subsequent workover operations. The multi-stage fracturing technology can be used in the cementing environment.

[0017] 2. An electronic intelligent control system is used to control the opening of the sliding sleeve, and wellbore pressure testing can be carried out to open the sliding sleeve at an accurate pressure and accurate time. Compared with the traditional rupture disk delay valve type toe-end sliding sleeve, it is more accurate to open, and the sliding sleeve can be opened without applying ultra-high pressure, and the operation is safer. It can still work normally after being left stationary in the well for 6 to 12 months. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The schematic drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0019] Figure 1It is the front view of the electric control sliding sleeve cementing and fracturing tool described in the present invention.

[0020] Figure 2 It is a sectional view along Figure 1 the A-A direction in

[0021] Figure 3 It is Figure 2 an enlarged schematic view of the electric control switch assembly part in

[0022] Figure 4 It is Figure 3 an enlarged schematic view of the seal shaft part in

[0023] Figure 5 It is Figure 2 an enlarged schematic view of the sliding sleeve part in

[0024] Figure 6 It is a sectional view along Figure 3 the B-B direction in

[0025] Figure 7 It is a mating schematic view of the seal shaft and the lower joint.

[0026] Figure 8 It is the front view of the upper joint, the sliding sleeve and the lower joint.

[0027] Figure 9 It is a schematic view of the electric control sliding sleeve cementing and fracturing tool described in the present invention in the open state.

[0028] Figure 10 It is a schematic view of the pulse pressure opening signal.

[0029] Figure 11 It is a schematic view of the pressure threshold holding pressure opening signal.

[0030] Figure 12 It is a schematic view of the control system.

[0031] 1. Lower joint; 2. Sleeve; 3. Sliding sleeve; 4. Upper joint; 5. Motor; 6. Pull rod; 7. Seal shaft; 8. gland; 9. Control unit; 10. Pressure sensor; 11. Power supply unit; 12. Axial channel; 13. Snap ring; 14. Shearing pin;

[0032] 101. Pressure measuring hole; 102. Radial connecting hole passage; 103. Axial connecting hole passage;

[0033] 201. Fracturing fluid discharge through hole;

[0034] 301. Outer snap ring groove;

[0035] 401. Inner snap ring groove. Detailed implementation manners

[0036] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] An electric control sliding sleeve cementing and fracturing tool includes an upper joint 4, a sliding sleeve 3, and a lower joint 1 connected in sequence from top to bottom. A sleeve 2 is sleeved outside the sliding sleeve 3. A fracturing fluid discharge through hole 201 is provided on the sleeve 2. An axial channel 12 is provided inside the electric control sliding sleeve cementing and fracturing tool. The sleeve 2 blocks the communication between the axial channel 12 and the fracturing fluid discharge through hole 201. The electric control sliding sleeve cementing and fracturing tool further includes a pressure sensor 10, a control unit 9, and an electric control switch assembly connected in sequence. The pressure sensor 10 can detect the pressure value inside the axial channel 12 in real time and send the pressure value to the control unit 9; when the control unit 9 receives a pressure opening signal, the control unit 9 can control the axial movement of the sliding sleeve 3 through the electric control switch assembly and make the axial channel 12 communicate with the fracturing fluid discharge through hole 201, as Figures 1 to 9 shown.

[0038] When the electric control sliding sleeve cementing and fracturing tool is in the closed state, the sliding sleeve 3 is hermetically connected to the lower joint 1, and the sliding sleeve 3 blocks the communication between the axial channel 12 and the fracturing fluid discharge through hole 201. When the electric control sliding sleeve cementing and fracturing tool is in the open state, the sliding sleeve 3 disengages from the lower joint 1, and the sliding sleeve 3 cannot block the communication between the axial channel 12 and the fracturing fluid discharge through hole 201.

[0039] In this embodiment, the axis of the electric control sliding sleeve cementing and fracturing tool, the axis of the axial channel 12, the axis of the upper joint 4, the axis of the sliding sleeve 3, the axis of the lower joint 1, and the axis of the sleeve 2 coincide. The pressure fluid can enter the axial channel 12 inside the electric control sliding sleeve cementing and fracturing tool from the upper end of the upper joint 4 and then be discharged from the lower end of the lower joint 1. In the present invention, the axial direction is the axis direction of the electric control sliding sleeve cementing and fracturing tool, and the radial direction in the present invention is the diameter direction of the electric control sliding sleeve cementing and fracturing tool.

[0040] In this embodiment, the lower part of the sleeve 2 is fixedly sleeved outside the upper part of the lower joint 1. The pressure sensor 10, the control unit 9, and the electric control switch assembly are all located between the sleeve 2 and the lower joint 1. A pressure measurement hole 101 is provided inside the side wall of the lower joint 1. The pressure sensor 10 is fixedly connected to the lower joint 1, and the pressure sensor 10 measures the pressure inside the axial channel 12 through the pressure measurement hole 101.

[0041] The axial channel 12 contains pressurized fluid, and the pressure sensor 10 measures the pressure value in the axial channel 12 in real time. The pressure sensor 10 can convert the detected pressure value into an electrical signal and send it to the control unit 9. When the control unit 9 receives a pressure value that matches the pressure opening signal set in the control unit 9 within a set time period, the control unit 9 determines that the pressure opening signal has been received. The control unit 9 can cause the electric control sleeve cementing and fracturing tool to change from the closed state to the open state. The control unit 9 includes a storage module and a comparison module. The storage module can store and change the pressure opening signal, and the comparison module can compare the pressure value received within a set time period with the set pressure opening signal.

[0042] The electric control sleeve cementing and fracturing tool can adopt two opening modes, that is, there are two set pressure opening signals. The first pressure opening signal is a pulse pressure opening signal, as Figure 10 shown. The second pressure opening signal is a pressure threshold holding pressure opening signal, as Figure 11 shown. That is, the pressure opening signal is a pulse pressure opening signal and / or a pressure threshold holding pressure opening signal. The two opening modes can be used simultaneously or alternatively, which will be introduced in detail below.

[0043] When the pressure opening signal is a pulse pressure opening signal, the ground equipment repeatedly pressurizes, and the pressure sensor 10 sends the detected pressure value to the control unit 9 in real time. When the control unit 9 receives a pressure value that matches the pulse pressure opening signal set in the control unit 9 within a set time period, the control unit 9 determines that the pressure opening signal has been received. Figure 10 The specific numerical ranges of P1, P2, t1, and t2 in

[0044] and the number of cycles of this time (that is, the number of T1 and T2) can be determined as needed. P1 is greater than P2, and t1 is equal to t2. Figure 11 The specific numerical ranges of P3 and t3 in

[0045] In this embodiment, an installation groove and a gland 8 are provided on the upper part of the lower joint 1, and the control unit 9 is connected to a power supply unit 11, as Figure 12As shown, the pressure sensor 10, the control unit 9, and the power supply unit 11 are all located within the installation groove. The power supply unit 11 includes a parallel battery pack and a series battery pack. The installation groove includes a circuit board installation groove and a battery installation groove. The control unit 9 is located within the circuit board installation groove, and the power supply unit 11 is located within the battery installation groove. The pressure sensor 10, the control unit 9, the power supply unit 11, and the electronic control switch assembly form an electronic intelligent control system.

[0046] In this embodiment, the electronic control switch assembly is fixed to the outer surface of the lower joint 1. The electronic control switch assembly includes a motor 5, a pull rod 6, and a sealing shaft 7 that are connected in sequence. The motor 5, the pull rod 6, the sealing shaft 7, and the sliding sleeve 3 are arranged axially in sequence. The motor 5 is connected to the control unit 9, and the motor 5 can axially move the sealing shaft 7 through the pull rod 6. The power supply unit 11 can supply power to the pressure sensor 10, the control unit 9, and the motor 5.

[0047] Specifically, the power supply unit 11 has two modules. One is a series battery pack module, and the other is a parallel battery pack module. The capacitance, current, and voltage of the two battery pack modules are different. The parallel battery pack module is only responsible for supplying power to the circuit board. The control unit 9 is provided on the circuit board, and the pressure sensor 10 uses the power of the circuit board. The series battery pack module is only responsible for supplying power to the motor 5, and the series battery pack module is connected to the motor power supply input interface of the circuit board, and the motor 5 is connected to the motor power supply output interface of the circuit board. The circuit board can control the switch between the motor power supply input and output.

[0048] The axes of the output shaft of the motor 5, the axis of the pull rod 6, and the axis of the sealing shaft 7 coincide. The axis of the sealing shaft 7 is parallel to the axis of the lower joint 1. The output shaft of the motor 5 is fixedly connected to the pull rod 6, and the pull rod 6 is threadedly connected to the sealing shaft 7. The outer surface of the sealing shaft 7 is provided with grooves or ridges, and the sealing shaft 7 is in concave-convex fit with the lower joint 1. In this way, when the pull rod 6 rotates, the sealing shaft 7 can only move axially and will not rotate.

[0049] In this embodiment, the side wall of the lower joint 1 includes a radially connecting channel 102 and an axially connecting channel 103 that are connected in sequence. The sealing shaft 7 is located within the axially connecting channel 103, and the sealing shaft 7 is sealingly connected to the axially connecting channel 103. The interior of the lower joint 1 can be sequentially communicated with the exterior of the lower joint 1 through the radially connecting channel 102 and the axially connecting channel 103.

[0050] In this embodiment, when the electric control sliding sleeve cementing and fracturing tool is in the closed state, the lower end of the sliding sleeve 3 is sleeved outside the upper end of the lower joint 1. The sliding sleeve 3 is sealingly connected to the lower joint 1, and the sealing shaft 7 seals the axial connection channel 103. During the process of the electric control sliding sleeve cementing and fracturing tool changing from the closed state to the open state, the sealing shaft 7 moves away from the sliding sleeve 3, and the pressure fluid in the axial channel 12 can sequentially pass through the radial connection channel 102 and the axial connection channel 103 and then push the sliding sleeve 3 to move away from the lower joint 1. When the electric control sliding sleeve cementing and fracturing tool is in the open state, the sliding sleeve 3 disengages from the lower joint 1, and the fracturing fluid in the axial channel 12 can be discharged through the fracturing fluid discharge through hole 201.

[0051] In this embodiment, the upper end of the sliding sleeve 3 is sleeved inside the lower end of the upper joint 4. The sliding sleeve 3 is sealingly connected to the upper joint 4. An outer snap ring groove 301 is provided outside the upper end of the sliding sleeve 3, and an inner snap ring groove 401 is provided inside the upper joint 4. When the electric control sliding sleeve cementing and fracturing tool is in the closed state, the positions of the outer snap ring groove 301 and the inner snap ring groove 401 are axially offset, and the outer snap ring groove 301 contains a snap ring 13, as Figure 5 shown; when the electric control sliding sleeve cementing and fracturing tool is in the open state, the positions of the outer snap ring groove 301 and the inner snap ring groove 401 are correspondingly communicated, and the outer snap ring groove 301 and the inner snap ring groove 401 are connected by the snap ring 13. The snap ring locks the position of the sliding sleeve 3, and the sliding sleeve 3 cannot move axially anymore, as Figure 9 shown.

[0052] In this embodiment, a plurality of fracturing fluid discharge through holes 201 are arranged along the circumferential direction of the sleeve 2. The fracturing fluid discharge through holes 201 are located between the upper joint 4 and the lower joint 1. The sliding sleeve 3 is sealingly connected to the sleeve 2. The upper end of the sleeve 2 is threadedly and sealingly connected to the upper joint 4, the lower end of the sleeve 2 is threadedly and sealingly connected to the lower joint 1, and the sleeve 2 and the sliding sleeve 3 are connected by a shear pin 14.

[0053] The working process of the electric control sliding sleeve cementing and fracturing tool is introduced below.

[0054] 1. Initially, the electric control sliding sleeve cementing and fracturing tool is in the closed state, as Figure 2 shown. Set the specific parameters of the pulse pressure opening signal on the ground and lower it into the well together with the fracturing string. After cementing, the casing pressure test can be carried out.

[0055] 2. When the sliding sleeve needs to be opened, that is, when the electric control sliding sleeve cementing and fracturing tool needs to change from the closed state to the open state, a set pulse pressure is applied from the ground into the wellbore. The pressure sensor 10 measures the pressure value in the axial channel 12 in real time. When the control unit 9 receives a pressure value that matches the pressure opening signal set in the control unit 9 within a set time period, the control unit 9 determines that the pressure opening signal has been received. The control unit 9 moves the sealing shaft 7 away from the sliding sleeve 3 through the motor 5 and the pull rod 6. The pressure liquid in the axial channel 12 sequentially pushes the sliding sleeve 3 away from the lower joint 1 through the radial connection hole 102 and the axial connection hole 103. The sliding sleeve 3 shears the shear pin 14 until the electric control sliding sleeve cementing and fracturing tool is in the open state. The fracturing fluid in the axial channel 12 is discharged from the fracturing fluid discharge through hole 201 to fracture the formation, as Figure 9 shown. At this time, the position of the outer snap ring groove 301 corresponds to and communicates with the position of the inner snap ring groove 401. The outer snap ring groove 301 and the inner snap ring groove 401 are connected by the snap ring, and the snap ring locks the position of the sliding sleeve 3, and the sliding sleeve 3 cannot move axially anymore.

[0056] For the convenience of understanding and description, absolute position relationships are used in the present invention. The orientation word "upper" represents the upper side direction in Figure 1 and "lower" represents the lower side direction in Figure 1 . The present invention is described from the observation perspective of the user or reader, but the above orientation words should not be understood or interpreted as limiting the protection scope of the present invention.

[0057] The above is only a specific embodiment of the present invention and cannot limit the scope of the invention implementation. Therefore, the replacement of equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention patent should still fall within the scope covered by this patent. In addition, the technical features in the present invention can be freely combined with each other between technical features, between technical features and technical solutions, and between technical solutions.

Claims

1. An electric control sliding sleeve cementing and fracturing tool, characterized in that, the electric control sliding sleeve cementing and fracturing tool includes an upper joint (4), a sliding sleeve (3) and a lower joint (1) connected in sequence. A sleeve (2) is sleeved outside the sliding sleeve (3). A fracturing fluid discharge through hole (201) is provided on the sleeve (2). An axial channel (12) is provided inside the electric control sliding sleeve cementing and fracturing tool. The sleeve (2) blocks the communication between the axial channel (12) and the fracturing fluid discharge through hole (201). The electric control sliding sleeve cementing and fracturing tool further includes a pressure sensor (10), a control unit (9) and an electric control switch assembly connected in sequence. The pressure sensor (10) can detect the pressure value in the axial channel (12) in real time and send it to the control unit (9); when the control unit (9) receives a pressure opening signal, the control unit (9) can control the axial movement of the sliding sleeve (3) through the electric control switch assembly and make the axial channel (12) communicate with the fracturing fluid discharge through hole (201); the electric control switch assembly includes a motor (5), a pull rod (6) and a sealing shaft (7) connected in sequence. The motor (5), the pull rod (6), the sealing shaft (7) and the sliding sleeve (3) are arranged axially in sequence. The motor (5) is connected to the control unit (9). The motor (5) can make the sealing shaft (7) move axially through the pull rod (6); a radial connecting hole (102) and an axial connecting hole (103) which are connected in sequence are provided inside the side wall of the lower joint (1). The sealing shaft (7) is located in the axial connecting hole (103). The sealing shaft (7) is sealingly connected to the axial connecting hole (103). The inside of the lower joint (1) can communicate with the outside of the lower joint (1) through the radial connecting hole (102) and the axial connecting hole (103) in sequence; when the electric control sliding sleeve cementing and fracturing tool is in the closed state, the lower end of the sliding sleeve (3) is sleeved outside the upper end of the lower joint (1). The sliding sleeve (3) is sealingly connected to the lower joint (1). The sealing shaft (7) blocks the axial connecting hole (103); during the process of the electric control sliding sleeve cementing and fracturing tool changing from the closed state to the open state, the sealing shaft (7) moves in a direction away from the sliding sleeve (3). The pressure fluid in the axial channel (12) can push the sliding sleeve (3) to move in a direction away from the lower joint (1) after passing through the radial connecting hole (102) and the axial connecting hole (103) in sequence; when the electric control sliding sleeve cementing and fracturing tool is in the open state, the sliding sleeve (3) disengages from the lower joint (1), and the fracturing fluid in the axial channel (12) can be discharged through the fracturing fluid discharge through hole (201); the sleeve (2) is connected to the sliding sleeve (3) through a shear pin (14); the lower part of the sleeve (2) is fixedly sleeved outside the upper part of the lower joint (1). The pressure sensor (10), the control unit (9) and the electric control switch assembly are all located between the sleeve (2) and the lower joint (1); A pressure measuring hole (101) is provided in the side wall of the lower sub (1). The pressure sensor (10) is fixedly connected to the lower sub (1). The pressure sensor (10) measures the pressure in the axial channel (12) through the pressure measuring hole (101). The pressure opening signal is a pulse pressure opening signal or a pressure threshold holding pressure opening signal. An installation groove is provided on the outer side of the upper part of the lower sub (1). The control unit (9) is connected to a power supply unit (11). The pressure sensor (10), the control unit (9) and the power supply unit (11) are all located in this installation groove. The upper end of the sliding sleeve (3) is sleeved inside the lower end of the upper sub (4). The sliding sleeve (3) is hermetically connected to the upper sub (4). An outer snap ring groove (301) is provided on the outer side of the upper end of the sliding sleeve (3). An inner snap ring groove (401) is provided inside the upper sub (4). When the electric control sliding sleeve cementing and fracturing tool is in the closed state, the position of the outer snap ring groove (301) is staggered from the position of the inner snap ring groove (401), and the outer snap ring groove (301) contains a snap ring (13). When the electric control sliding sleeve cementing and fracturing tool is in the open state, the position of the outer snap ring groove (301) corresponds to the position of the inner snap ring groove (401), and the outer snap ring groove (301) and the inner snap ring groove (401) are connected by this snap ring (13).

2. The electric control sliding sleeve cementing and fracturing tool according to claim 1, characterized in that, A plurality of fracturing fluid discharge through holes (201) are arranged along the circumferential direction of the sleeve (2). The fracturing fluid discharge through holes (201) are located between the upper sub (4) and the lower sub (1). The sliding sleeve (3) is hermetically connected to the sleeve (2).

3. The electric control sliding sleeve cementing and fracturing tool according to claim 1, characterized in that, The upper end of the sleeve (2) is threadedly connected to the upper sub (4), and the lower end of the sleeve (2) is threadedly connected to the lower sub (1).

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