Traceable intelligent fracturing sliding sleeve opening tool

Abstract

The invention relates to the technical field of oil and gas field development, in particular to a traceable intelligent fracturing sliding sleeve opening tool which comprises a plurality of fracturing sliding sleeves arranged in a downhole pipe column and an opening tool body capable of passing through the fracturing sliding sleeves, and the opening tool body can record the number of times of passing through the fracturing sliding sleeves when passing through each fracturing sliding sleeve. The opening tool sends a signal for opening or closing the fracturing sliding sleeves after passing through the appointed number of fracturing sliding sleeves, so that the corresponding fracturing sliding sleeves are opened or closed; an opening tool can be used for opening the intelligent fracturing sliding sleeves at the specified positions and in the specified number.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas field development, and more specifically to a traceable intelligent fracturing sleeve opening tool. Background Art

[0002] According to geological conditions and reservoir characteristics, in order to further improve the development effect and carry out efficient fracturing and production enhancement transformation of oil and gas reservoirs, the existing full-bore fracturing sleeve involves the use of multiple opening tools, each of which has a unique profile, which is processed along the circumference of its outer surface to lock the chuck or finger in the specific valve on the pipe string to produce a fluid seal, and then increase the fluid pressure above the valve to complete the fracturing. However, during the pumping process, the opening tool in the wellbore is opened early or late due to a fault, and its specific position cannot be determined, thereby increasing the overall time and cost of the wellbore operation; for example, the patent number CN115653541B discloses a segmented multi-cluster fracturing intelligent sleeve system and method based on a smart key tag, which can make the sleeve without step-by-step reduction, and can realize the simultaneous opening of multiple sleeves in a single fracturing section through a smart key tag; but the disadvantage of the patent is that it is impossible to open a specified position and a specified number of intelligent fracturing sleeves with one opening tool. Summary of the invention

[0003] The object of the present invention is to provide a traceable intelligent fracturing sleeve opening tool, which can open a specified position and a specified number of intelligent fracturing sleeves by using one opening tool.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] A traceable intelligent fracturing sleeve opening tool, comprising a plurality of fracturing sleeves arranged in a downhole tubular and an opening tool capable of passing through the plurality of fracturing sleeves, wherein the opening tool can record the number of times the fracturing sleeves are passed through when passing through each fracturing sleeve, and the opening tool sends a signal for opening or closing the fracturing sleeves after passing through a specified number of fracturing sleeves, so that the corresponding fracturing sleeves are opened or closed;

[0006] The fracturing sleeve comprises a sleeve body and an upper joint fixedly connected to the end of the sleeve body, a signal source installation sleeve is fixedly connected between the sleeve body and the upper joint, and a signal source capable of transmitting signals is installed on the signal source installation sleeve;

[0007] The sliding sleeve body is provided with a channel for the opening tool to pass through, and the channel is provided with a reduced diameter smaller than the inner diameter of the channel;

[0008] A switch fixing seat is installed in the middle of the sliding sleeve body, a pressure cover I is fixedly connected to the sliding sleeve body, the pressure cover I is pressed on the end of the switch fixing seat, a sealed cavity I is formed between the pressure cover I and the switch fixing seat, a switch is arranged on the switch fixing seat, a signal receiving unit, an electric control unit I and an execution unit are arranged in the sealed cavity I, the signal receiving unit receives an opening or closing signal sent by the opening tool, and the execution unit controls the switch to open or close after receiving the signal;

[0009] A switch cavity is formed between the switch fixing seat and the sliding sleeve body, the switch is arranged in the switch cavity, and a cement retarder is arranged in the switch cavity;

[0010] The opening tool is a fixed fracturing sleeve opening tool, which includes a tail wing I and an electrically controlled cavity I fixedly connected to the front end of the tail wing I, a return channel I is provided in the tail wing I, a baffle I is fixedly connected to the tail wing I, a cavity for receiving the fracturing ball I is formed between the baffle I and the tail wing I, and the fracturing ball I can be supported on the return channel I, a gland II is fixedly connected to the electrically controlled cavity I, a plurality of inner holes I are provided on the electrically controlled cavity I, a plurality of claws I with magnets installed at the bottom are slidably connected to the gland II, the plurality of inner holes I and the plurality of claws I correspond to each other, an electromagnet is provided in the inner hole I, and an elastic component I is provided between the electromagnet and the magnet;

[0011] A sealed cavity II is formed between the tail wing I and the electric control cavity I. The sealed cavity II is provided with a sensing device I, a signal transmitter I and an electric control unit II. The sensing device I is used to receive a signal transmitted by a signal source, and the signal transmitter I is used to send a signal to turn on or off the control switch. After the sensing device I receives the signal sent by the signal source, the electric control unit II transmits current to the electromagnet. The magnetic poles of the electromagnet repel the same poles of the magnet, so that the claw I does not retract when passing through the reduced diameter of the sleeve body, and is then stuck at the reduced diameter.

[0012] The opening tool is a fracturing sleeve opening tool, which includes a tail wing II and an electrically controlled cavity II fixedly connected to the front end of the tail wing II, a return channel II is arranged in the tail wing II, a baffle II is fixedly connected to the tail wing II, a cavity for receiving the fracturing ball II is formed between the baffle II and the tail wing II, and the fracturing ball II can be supported on the return channel II, a pressure cap III is fixedly connected to the electrically controlled cavity II, a plurality of inner holes II are arranged on the electrically controlled cavity II, a plurality of claws II are slidably connected to the pressure cap III, the plurality of inner holes II and the plurality of claws II correspond to each other, and an elastic component II is arranged between the inner hole II and the claw II;

[0013] A sealed cavity III is formed between the tail wing II and the electric control cavity II, and a sensing device II, a signal transmitter II and an electric control unit III are arranged in the sealed cavity III. The sensing device II is used to receive a signal transmitted by a signal source, and the signal transmitter II is used to send a signal to turn on or off the control switch;

[0014] When the opening tool passes through the reduced diameter of the fracturing sleeve, a pressure signal is generated, and the pressure fluctuation signal is captured to determine whether the opening tool reaches the designated fracturing sleeve.

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

[0016] 1. During the fracturing process, a traceable opening tool is used as a pre-installed fracturing sleeve opening tool on the casing completion string. The opening and fracturing operations of the fracturing sleeves at all levels in the well can be completed by automatically placing it at the wellhead and pumping it. While achieving full-bore, high-efficiency and intensive fracturing of the entire well section, pyrotechnics, cables and other measures are avoided;

[0017] 2. Automatically identify the target fracturing sleeve by opening the tool, and then open or close the specified fracturing sleeve;

[0018] 3. The opening tool is equipped with a rubber tail. When passing through the fracturing sleeve, the ground can monitor the pressure fluctuation and track the arrival position of the tag; when the opening tool is stuck in the fracturing sleeve, it plays a sealing role;

[0019] 4. The retractable locking device of the opening tool makes it easier for the tool to pass through the inner diameter of the casing that has been reduced due to sleeve changes during pumping;

[0020] 5. The opening tool is made of soluble materials to meet the requirements of rapid drainage of the well after the fracturing construction is completed and the wear-free drill is used;

[0021] 6. In the later stage of mining, without changing the formation properties and the inner diameter of the casing, each time a tool is thrown, it is possible to simultaneously open and close the fracturing sleeves of multiple arbitrary layers (the layers can be continuous or discontinuous), thereby greatly reducing the complexity and cost of the operation;

[0022] 7. It can realize unlimited, more efficient and accurate fracturing of unconventional oil and gas wells, thus saving time and cost of fracturing operations and optimizing the production effect of oil and gas wells. At the same time, it can realize water-free operation of the production layer in the later stage of production. Through the switchable intelligent fracturing sleeve preset in the completion string, it can realize repeatable switch control of the production layer without using the continuous tubing to carry the switch tool, without changing the diameter of the completion string and without producing the production fluid throttling, which greatly improves the flexibility of oil and gas reservoir regulation from the initial development to the later stage of oil stabilization and water control. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0024] Figure 1 This is a schematic diagram of the first opening structure of the traceable intelligent fracturing sleeve opening tool of the present invention;

[0025] Figure 2It is a schematic diagram of the subsequent opening structure of the traceable intelligent fracturing sleeve opening tool of the present invention;

[0026] Figure 3 It is a schematic diagram of the connection structure of the fracturing sleeve and the fracturing sleeve opening tool of the present invention;

[0027] Figure 4 It is a schematic diagram of the switch closing structure of the fracturing sleeve of the present invention;

[0028] Figure 5 is a sectional view of the FF section of the present invention;

[0029] Figure 6 It is a schematic diagram of the switch opening structure of the fracturing sleeve of the present invention;

[0030] Figure 7 is a KK cross-sectional view of the present invention;

[0031] Figure 8 It is a schematic diagram of the structure of the locking fracturing sliding sleeve opening tool of the present invention;

[0032] Fig. 9 It is a schematic diagram of the structure of the fracturing sleeve opening tool of the present invention;

[0033] Fig.10 It is a fracturing sleeve control circuit of the present invention;

[0034] Fig.11 It is a control circuit of a locking fracturing sleeve opening tool of the present invention;

[0035] Fig.12 The invention relates to a control circuit for a fracturing sleeve opening tool.

[0036] In the figure: fracturing sleeve 1; upper joint 11; signal source installation sleeve 12; signal source 13; sleeve body 14; pressure cover Ⅰ15; switch fixing seat 16; switch 17; signal receiving unit 18; electric control unit Ⅰ19; execution unit 110; cement retarder 111; fixed fracturing sleeve opening tool 2; tail wing Ⅰ21; electric control cavity Ⅰ22; induction device Ⅰ23; signal transmitter Ⅰ24; electric control unit Ⅱ25; pressure cover Ⅱ26; claw Ⅰ27; electromagnet 28; elastic component Ⅰ29; magnet 210; baffle Ⅰ211; fracturing ball Ⅰ212; fracturing sleeve opening tool 3; tail wing Ⅱ31; electric control cavity Ⅱ32; induction device Ⅱ33; signal transmitter Ⅱ34; electric control unit Ⅲ35; pressure cover Ⅲ36; claw Ⅱ37; elastic component Ⅱ38; baffle Ⅱ39; fracturing ball Ⅱ310. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below with reference to the accompanying drawings.

[0038] like Figure 1 The figure shows the structural schematic diagram of opening the fracturing sleeve for the first time using the fixed fracturing sleeve opening tool. Figure 2 It is a schematic diagram of the structure of using a non-stuck fracturing sleeve opening tool to open or close the subsequent fracturing sleeve;

[0039] Combine the following Figure 1 , Figures 4 to 8 , detailing the process of opening the fracturing sleeve for the first time using the fixed fracturing sleeve opening tool;

[0040] A traceable intelligent fracturing sleeve opening tool, comprising a plurality of fracturing sleeves 1 arranged in a downhole tubular and an opening tool capable of passing through the plurality of fracturing sleeves 1, wherein the opening tool can record the number of times the fracturing sleeve 1 is passed through when passing through each fracturing sleeve 1, and the opening tool sends a signal for opening or closing the fracturing sleeve 1 after passing through a specified number of fracturing sleeves 1, so that the corresponding fracturing sleeve 1 is opened or closed;

[0041] The fracturing sleeve 1 comprises a sleeve body 14 and an upper joint 11 fixedly connected to the end of the sleeve body 14 by threads, a signal source installation sleeve 12 is fixedly connected between the sleeve body 14 and the upper joint 11 by threads, and a signal source 13 capable of transmitting signals is installed on the signal source installation sleeve 12;

[0042] The sliding sleeve body 14 is provided with a passage for the opening tool to pass through, and a reduced diameter smaller than the inner diameter of the passage is provided in the passage;

[0043] A switch fixing seat 16 is installed in the middle of the sleeve body 14, a sealing ring is arranged between the sleeve body 14 and the switch fixing seat 16, a gland Ⅰ15 is fixedly connected to the sleeve body 14, the gland Ⅰ15 is pressed on the end of the switch fixing seat 16, a sealing ring is arranged between the gland Ⅰ15 and the sleeve body 14, a sealing ring is arranged between the gland Ⅰ15 and the switch fixing seat 16, a sealed chamber Ⅰ is formed between the gland Ⅰ15 and the switch fixing seat 16, a switch 17 is arranged on the switch fixing seat 16, a signal receiving unit 18, an electric control unit Ⅰ19 and an execution unit 110 are arranged in the sealed chamber Ⅰ, the signal receiving unit 18 receives an opening or closing signal sent by the opening tool, and after receiving the signal, the execution unit 110 controls the switch 17 to open or close;

[0044] A switch cavity is formed between the switch fixing seat 16 and the sliding sleeve body 14, and a switch 17 is arranged in the switch cavity. A cement retarder 111 is arranged in the switch cavity;

[0045] The opening tool is a fixed fracturing sleeve opening tool 2, which includes a tail wing Ⅰ21 and an electric control cavity Ⅰ22 fixedly connected to the front end of the tail wing Ⅰ21. The tail wing Ⅰ21 is a metal part with vulcanized rubber. A return channel Ⅰ is arranged in the tail wing Ⅰ21. A baffle Ⅰ211 is fixedly connected to the tail wing Ⅰ21 through a thread. A cavity for accommodating a fracturing ball Ⅰ212 is formed between the baffle Ⅰ211 and the tail wing Ⅰ21. The fracturing ball Ⅰ212 can be placed on the return channel Ⅰ. The electric control cavity Ⅰ22 is fixedly connected to the electric control cavity Ⅰ22 through a thread. A gland II 26, a sealing ring is arranged between the electric control cavity I 22 and the gland II 26, a plurality of inner holes I are arranged on the electric control cavity I 22, a plurality of claws I 27 with magnets 210 installed at the bottom are slidably connected to the gland II 26, a sealing ring is arranged between the claws I 27 and the gland II 26, the plurality of inner holes I and the plurality of claws I 27 correspond to each other, an electromagnet 28 is arranged in the inner hole I, an elastic component I 29 is arranged between the electromagnet 28 and the magnet 210, and the elastic component I 29 can be a butterfly spring or other springs or rubber pads that can form elastic force, etc.;

[0046] A sealing ring is provided between the tail wing Ⅰ21 and the electric control cavity Ⅰ22, and a sealed cavity Ⅱ is formed between the tail wing Ⅰ21 and the electric control cavity Ⅰ22. The sealed cavity Ⅱ is provided with a sensing device Ⅰ23, a signal transmitter Ⅰ24 and an electric control unit Ⅱ25. The sensing device Ⅰ23 is used to receive a signal transmitted by the signal source 13, and the signal transmitter Ⅰ24 is used to send a signal to turn on or off the control switch 17. After the sensing device Ⅰ23 receives the signal sent by the signal source 13, the electric control unit Ⅱ25 transmits current to the electromagnet 28. The magnetic poles of the electromagnet 28 and the same poles of the magnet 210 repel each other, so that the claw Ⅰ27 does not retract when passing through the reduced diameter of the sleeve body 14, and is then stuck at the reduced diameter;

[0047] When the opening tool passes through the reduced diameter of the fracturing sleeve 1, a pressure signal is generated, and the pressure fluctuation signal is captured to determine whether the opening tool reaches the designated fracturing sleeve 1;

[0048] When the opening tool passes through the target fracturing sleeve 1, the sensing device I23 senses the signal from the signal source 13, and the electric control unit II25 transmits current to the signal transmitter I24, so that the signal transmitter I24 sends a signal, and at the same time, the signal receiving unit 18 in the target fracturing sleeve 1 receives the signal. After receiving the signal, the execution unit 110 controls the switch 17 to open (combined with Figure 7 Middle KK view) Fracturing channel is open;

[0049] When the fracturing sleeve 1 is opened for the first time, the fracturing sleeve opening tool 2 is locked and blocked at the reduced diameter of the fracturing sleeve 1, and the sandblasting hole is opened. With the pump truck pressurizing, the fracturing ball Ⅰ212 in the fracturing sleeve opening tool 2 is blocked in the return channel Ⅰ to form a one-way valve, and the fracturing fluid Figure 7In the middle KK view, the flow direction of the shear head A is outflowed to complete the first fracturing operation of the fracturing sleeve 1;

[0050] Combination Fig.11 The circuit for locking the fracturing sleeve opening tool 2 is composed of a serial communication circuit, a sensing device I 23, a microcontroller, a status display circuit, a power supply circuit, a driver circuit and an electronic control unit II 25. The ground controller queries the tool status and sets the target address information through the serial communication circuit.

[0051] The ground controller and the microcontroller exchange information through the serial communication circuit, the status display circuit displays the logic state analyzed by the microcontroller, the sensing device I 23 receives the information sent by the signal source 13, the microcontroller outputs a signal to the drive circuit according to the received information, and the drive circuit drives the electronic control unit II 25 to make a corresponding action; at the same time, the microcontroller transmits the corresponding information through the signal transmitter I 24; the power supply circuit provides power for the sensing device I 23, the microcontroller, the status display circuit, the driver circuit and the signal transmitter I 24;

[0052] The locking fracturing sleeve opening tool 2 senses the signal from the signal source 13 through the sensing device Ⅰ 23 to count, and after reaching the target fracturing sleeve 1, the driving circuit drives the electronic control unit Ⅱ 25 to control the action of the clamping claw Ⅰ 27, and at the same time drives the signal transmitter Ⅰ 24 to send a signal;

[0053] Combination Fig.10 The fracturing sleeve 1 circuit is composed of a signal receiving unit 18, a microcontroller, a power supply circuit, a driver circuit and an execution unit 110. The signal receiving unit 18 transmits information to the microcontroller, and the microcontroller outputs a signal to the driver circuit according to the received information, and the driver circuit drives the execution unit 110 to perform corresponding actions. The power supply circuit provides power to the signal receiving unit 18, the microcontroller and the driver circuit.

[0054] After the signal receiving unit 18 receives the signal sent by the signal transmitter I 24 of the opening tool, the driving circuit drives the execution unit 110 to operate, completing the opening and closing of the switch 17;

[0055] The fixed fracturing sleeve opening tool 2 is pumped by the surface and transported to the underground through the casing. When the sensing device I23 in the fixed fracturing sleeve opening tool 2 passes through the first-stage fracturing sleeve 1 and detects the signal emitted by the signal ring in the fracturing sleeve, the count is "1". When the fixed fracturing sleeve opening tool 2 continues to pass through the signal emitted by the signal ring in the second-stage fracturing sleeve 1, the count is "2". When it passes through the Nth-stage fracturing sleeve 1, the count is "N".

[0056] Combination Figure 1When the target fracturing sleeve of the fracturing is the Nth-level fracturing sleeve, the target address is set to "N" through the electronic control system, and the fixed fracturing sleeve opening tool 2 is transported to the downhole through the casing. When the sensing device I23 in the fixed fracturing sleeve opening tool 2 passes through the fracturing sleeve 1 and detects the signal sent by the signal ring in the intelligent fracturing sleeve 1, the count is "1". When passing through the second-level fracturing sleeve in turn, the sensing device I23 in the fixed fracturing sleeve opening tool 2 detects the signal sent by the signal ring, and the count is "2". When passing through the Nth-level fracturing sleeve in turn, the count is "N". At this time, when the fixed fracturing sleeve opening tool 2 passes through the target fracturing sleeve, the sensing device I23 senses the signal of the signal source 13, and the electronic control unit II25 transmits current to the electromagnet 28. The magnetic pole of the electromagnet 28 repels the same pole of the magnet 210 installed on the claw I27, so that the claw I27 does not retract the aperture when passing through the shrinking diameter of the sleeve body 14, and is then stuck at the shrinking diameter.

[0057] At the same time, when the fracturing sleeve opening tool 2 passes through the target fracturing sleeve 1, the sensing device senses the signal from the signal source 13, and the electronic control unit II 25 transmits current to the signal transmitter I 24, so that the signal transmitter I 24 sends a signal, and at the same time, the signal receiving unit 18 in the target fracturing sleeve receives the signal. After receiving the signal, the execution unit 110 controls the switch 17 to open (combined with Figure 7 (KK view in the middle) The fracturing channel is opened; by applying pressure on the ground, the fracturing sleeve opening tool 2 is fixed at the reduced diameter of the sleeve body 14, and the tail wing Ⅰ21 also produces a sealing effect at the same time, and the fracturing fluid flows along the channel opened by the fracturing sleeve 1 to complete the fracturing operation;

[0058] Combine the following Figures 2 to 7 , Fig. 9 , explaining how to open and close multiple fracturing sleeves in any layer (the layers can be continuous or discontinuous) at the same time by throwing a tool each time without changing the formation properties and the inner diameter of the casing in the later stage of production;

[0059] The opening tool is a fracturing sleeve opening tool 3, which includes a tail wing II 31 and an electric control cavity II 32 fixedly connected to the front end of the tail wing II 31. The tail wing II 31 is a metal part with vulcanized rubber. A return channel II is arranged in the tail wing II 31. A baffle II 39 is fixedly connected to the tail wing II 31. A cavity for accommodating a fracturing ball II 310 is formed between the baffle II 39 and the tail wing II 31. The fracturing ball II 310 can be placed on the return channel II. The electric control cavity II 32 A gland III 36 is fixedly connected to the upper part, a sealing ring is arranged between the electric control cavity II 32 and the gland III 36, a plurality of inner holes II are arranged on the electric control cavity II 32, a plurality of claws II 37 are slidably connected to the gland III 36, a sealing ring is arranged between the claws II 37 and the gland III 36, the plurality of inner holes II and the plurality of claws II 37 correspond to each other, an elastic component II 38 is arranged between the inner hole II and the claws II 37; the elastic component II 38 can be a butterfly spring or other springs or rubber pads capable of forming elastic force, etc.;

[0060] A sealed cavity III is formed between the tail wing II 31 and the electric control cavity II 32, and a sensing device II 33, a signal transmitter II 34 and an electric control unit III 35 are arranged in the sealed cavity III. The sensing device II 33 is used to receive the signal transmitted by the signal source 13, and the signal transmitter II 34 is used to send a signal to turn on or off the control switch 17;

[0061] When the sensing device II33 does not sense the corresponding address, the signal transmitter II34 is not energized. When the fracturing sleeve opening tool 3 passes through the reduced diameter of the fracturing sleeve 1, the claw II37 is compressed back into the radial hole, thereby passing through the non-target fracturing sleeve 1. After passing through the reduced diameter, the claw II37 pops out again under the elastic force of the disc spring.

[0062] When the fracturing sleeve opening tool 3 passes through the target fracturing sleeve 1, the sensing device II 33 senses the signal from the signal source 13, and the electric control unit III 35 sends current to the signal transmitter II 34, so that the signal transmitter II 34 sends a signal, and at the same time, the signal receiving unit 18 in the target fracturing sleeve 1 receives the signal. After receiving the signal, the execution unit 110 controls the switch 17 to open or close (combined with the Figure 7 Middle KK view) Fracturing channel open or closed;

[0063] Combination Fig.12 The circuit of the fracturing sleeve opening tool 3 is composed of a serial communication circuit, a sensing device II 33, a microcontroller, a status display circuit, a power supply circuit and a signal transmitter II 34; the ground controller communicates with the traceable smart key through the serial port to query the tool status and set the target address information;

[0064] The ground controller and the microcontroller exchange information through the serial communication circuit, the status display circuit displays the logic state analyzed by the microcontroller, and the sensing device II 33 receives the information sent by the signal source 13; at the same time, the microcontroller transmits the corresponding information through the signal transmitter II 34; the power supply circuit provides power to the sensing device II 33, the microcontroller, the status display circuit and the signal transmitter II 34;

[0065] The fracturing sleeve opening tool 3 senses the signal from the signal source 13 through the sensing device II 33 to count, and after reaching the target fracturing sleeve 1, it drives the signal transmitter II 34 to send a signal;

[0066] The fracturing sleeve opening tool 3 is pumped by the surface and transported to the underground through the casing. When the sensing device II 33 in the fracturing sleeve opening tool 3 passes through the fracturing sleeve 1 and detects the signal sent by the signal source 13 in the first-stage fracturing sleeve 1, the count is "1". When the fracturing sleeve opening tool 3 continues to pass through the signal sent by the signal ring in the second-stage fracturing sleeve 1, the count is "2". When it passes through the Nth-stage fracturing sleeve 1, the count is "N".

[0067] Combination Figure 2 When the target fracturing sleeve 1 for fracturing is the Nth-level fracturing sleeve 1, the target address is set to "N" through the electronic control system, and the fracturing sleeve opening tool 3 is transported to the downhole through the casing. When the sensing device II33 in the fracturing sleeve opening tool 3 passes through the fracturing sleeve 1 and detects the signal sent by the signal source 13 in the fracturing sleeve 1, the count is "1". When it passes through the second-level fracturing sleeve 1 in sequence, the sensing device II33 in the fracturing sleeve opening tool 3 detects the signal sent by the signal source 13, and the count is "2". When it passes through the Nth-level fracturing sleeve 1 in sequence, the count is "N". At this time, when the fracturing sleeve opening tool 3 passes through the target fracturing sleeve 1, the sensing device II33 senses the signal of the signal source 13, and the electronic control unit III35 transmits current to the signal transmitter II34, so that the signal transmitter II34 sends a signal. At the same time, the signal receiving unit 18 in the target fracturing sleeve 1 receives the signal. After receiving the signal, the execution unit 110 controls the switch 17 to open or close (combined with Figure 5 Middle KK view) Fracturing channel open or closed;

[0068] Combination Figure 3 During the pumping process of the fracturing sleeve opening tool 3, when the fracturing sleeve opening tool 3 passes through the sleeve reduction (as shown in the figure), in order to allow the claw II 37 to be compressed back into the hole and pass through the reduction smoothly, the pressure in the wellbore will increase instantly, thereby generating pressure fluctuations. At the same time, the high-frequency pressure sensor on the wellhead surface will capture the pressure fluctuation signal. Each time the pressure fluctuation signal is captured, it means that the fracturing sleeve opening tool 3 passes through the primary fracturing sleeve 1, thereby judging whether the specific position of the fracturing sleeve opening tool 3 reaches the designated target fracturing sleeve 1 required for the operation;

[0069] After the fracturing construction of all sections of the whole well is completed, under the action of the downhole medium, the opening tool is made of soluble materials such as magnesium-aluminum alloy. When immersed in the fracturing fluid containing salt solution, it can be completely dissolved within a certain period of time, the inner diameter of the sliding sleeve is restored, and the implementation process is completed.

Claims

1. A traceable intelligent fracturing sleeve opening tool, comprising a plurality of fracturing sleeves (1) arranged in a downhole tubular column and an opening tool capable of passing through the plurality of fracturing sleeves (1), characterized in that: The opening tool can record the number of times the fracturing sleeve (1) is passed when passing each fracturing sleeve (1). After the opening tool passes a specified number of fracturing sleeves (1), a signal for opening or closing the fracturing sleeve (1) is sent, so that the corresponding fracturing sleeve (1) is opened or closed.

2. The traceable intelligent fracturing sleeve opening tool according to claim 1, characterized in that: The fracturing sleeve (1) comprises a sleeve body (14) and an upper joint (11) fixedly connected to the end of the sleeve body (14); a signal source mounting sleeve (12) is fixedly connected between the sleeve body (14) and the upper joint (11); and a signal source (13) capable of transmitting signals is mounted on the signal source mounting sleeve (12).

3. The traceable intelligent fracturing sleeve opening tool according to claim 2 is characterized in that: The sliding sleeve body (14) is provided with a channel for the opening tool to pass through, and a reduced diameter smaller than the inner diameter of the channel is provided in the channel.

4. The traceable intelligent fracturing sleeve opening tool according to claim 3 is characterized in that: A switch fixing seat (16) is installed in the middle of the sliding sleeve body (14), and a pressure cover I (15) is fixedly connected to the sliding sleeve body (14). The pressure cover I (15) is pressed on the end of the switch fixing seat (16), and a sealed chamber I is formed between the pressure cover I (15) and the switch fixing seat (16). A switch (17) is arranged on the switch fixing seat (16), and a signal receiving unit (18), an electric control unit I (19) and an execution unit (110) are arranged in the sealed chamber I. The signal receiving unit (18) receives an opening or closing signal sent by the opening tool, and after receiving the signal, the execution unit (110) controls the switch (17) to open or close.

5. The traceable intelligent fracturing sleeve opening tool according to claim 4 is characterized in that: A switch cavity is formed between the switch fixing seat (16) and the sliding sleeve body (14), the switch (17) is arranged in the switch cavity, and a cement retarder (111) is arranged in the switch cavity.

6. The traceable intelligent fracturing sleeve opening tool according to claim 4, characterized in that: The opening tool is a locking fracturing sleeve opening tool (2), which comprises a tail wing I (21) and an electric control cavity I (22) fixedly connected to the front end of the tail wing I (21), a backflow channel I is arranged in the tail wing I (21), a baffle I (211) is fixedly connected to the tail wing I (21), a cavity for receiving a fracturing ball I (212) is formed between the baffle I (211) and the tail wing I (21), and the fracturing ball I (212) is arranged in the cavity. 2) It can be placed on the return channel I, a pressure cover II (26) is fixedly connected to the electric control chamber I (22), a plurality of inner holes I are arranged on the electric control chamber I (22), a plurality of claws I (27) with magnets (210) installed at the bottom are slidably connected to the pressure cover II (26), the plurality of inner holes I and the plurality of claws I (27) correspond to each other, an electromagnet (28) is arranged in the inner hole I, and an elastic component I (29) is arranged between the electromagnet (28) and the magnet (210).

7. The traceable intelligent fracturing sleeve opening tool according to claim 6 is characterized in that: A sealed cavity II is formed between the tail wing I (21) and the electric control cavity I (22), and a sensing device I (23), a signal transmitter I (24) and an electric control unit II (25) are arranged in the sealed cavity II. The sensing device I (23) is used to receive a signal transmitted by a signal source (13), and the signal transmitter I (24) is used to send a signal to turn on or off the control switch (17). After the sensing device I (23) receives the signal sent by the signal source (13), the electric control unit II (25) transmits current to the electromagnet (28). The magnetic poles of the electromagnet (28) and the magnet (210) repel each other with the same poles, so that the claw I (27) does not retract when passing through the reduced diameter of the sleeve body (14), and is then stuck at the reduced diameter.

8. The traceable intelligent fracturing sleeve opening tool according to claim 4, characterized in that: The opening tool is a fracturing sleeve opening tool (3), which comprises a tail wing II (31) and an electrically controlled cavity II (32) fixedly connected to the front end of the tail wing II (31), a return channel II is arranged in the tail wing II (31), a baffle II (39) is fixedly connected to the tail wing II (31), a cavity for accommodating a fracturing ball II (310) is formed between the baffle II (39) and the tail wing II (31), and the fracturing ball II (310) can be supported on the return channel II, a pressure cap III (36) is fixedly connected to the electrically controlled cavity II (32), a plurality of inner holes II are arranged on the electrically controlled cavity II (32), a plurality of claws II (37) are slidably connected to the pressure cap III (36), the plurality of inner holes II and the plurality of claws II (37) correspond to each other, and an elastic component II (38) is arranged between the inner hole II and the claw II (37).

9. The traceable intelligent fracturing sleeve opening tool according to claim 8, characterized in that: A sealed cavity III is formed between the tail wing II (31) and the electric control cavity II (32), and a sensing device II (33), a signal transmitter II (34) and an electric control unit III (35) are arranged in the sealed cavity III. The sensing device II (33) is used to receive a signal transmitted by a signal source (13), and the signal transmitter II (34) is used to send a signal to turn on or off the control switch (17).

10. The traceable intelligent fracturing sleeve opening tool according to claim 3, characterized in that: When the opening tool passes through the reduced diameter portion of the fracturing sleeve (1), a pressure signal is generated, and the pressure fluctuation signal is captured to determine whether the opening tool has reached the designated fracturing sleeve (1).

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