A fracturing sliding sleeve and fracturing system

Abstract

This application provides a fracturing sliding sleeve and a fracturing system, belonging to the field of fracturing technology. The fracturing sliding sleeve includes a casing and a valve core assembly. The side wall of the casing is provided with an oil collecting hole and a fracturing hole communicating with the casing. An adjustment device for controlling the oil-water ratio is provided in the oil collecting hole, and an identification module for identifying the location of the casing is provided in the casing; it is slidably connected inside the casing. By providing an oil collecting hole and a fracturing hole on the casing, during the fracturing process, the oil collecting hole is closed and the fracturing hole is opened, and the fracturing fluid flows out from the fracturing hole to the outside of the bottom layer. After fracturing is completed, the oil collecting hole is opened and the fracturing hole is closed, allowing oil and gas to enter the casing from the oil collecting hole. When passing through the adjustment device in the oil collecting hole, the oil-water ratio in the oil and gas is regulated, thereby reducing the water content in the oil and gas after being regulated by the adjustment device, that is, reducing the proportion of water in the oil-water ratio and increasing the proportion of oil in the oil-water ratio, effectively reducing water channeling, and at the same time reducing the risk of water flooding in the well.

Description

Technical Field

[0001] This application relates to fracturing technology, and more particularly to a fracturing sleeve and a fracturing system. Background Technology

[0002] Fracturing technology uses a surface high-pressure pump unit to inject fracturing fluid into the well at a rate far exceeding the formation's absorption capacity. High pressure is generated at the bottom of the well, causing the oil-bearing rock to fracture and form a fracture. Then, liquid containing proppant is injected into the fracture to extend it outward. Propane is then filled into the fracture to solidify and support it, allowing more oil and gas to enter the well through the fracture and increasing oil and gas production.

[0003] Currently, fracturing fluid typically enters the formation through fracturing holes on the sliding sleeve. Before fracturing, the fracturing holes on the sliding sleeve are closed and require devices such as ball drops, mechanical screw clamps, darts, or electronic tags, along with fracturing fluid pressure buildup, to open them. After opening, fracturing fluid is injected into the designated formation. After fracturing, oil and gas from the formation enter the sliding sleeve through the fracturing holes and are collected at the surface. However, the oil and gas collected using existing technology contains not only crude oil but also a large amount of mineral-rich geological water and a small amount of fracturing fluid. Current technology does not control the produced fluid, leading to uneven fluid profiles and causing water coning and channeling. Furthermore, large amounts of water entering the sliding sleeve can easily cause downhole malfunctions due to flooding. Summary of the Invention

[0004] This application provides a fracturing sleeve and a fracturing system to solve the technical problem of high water content in the oil and gas collected by existing sleeves during the oil gathering stage.

[0005] On the one hand, this application provides a fracturing sleeve comprising:

[0006] The casing has an oil collection hole and a fracturing hole communicating with the casing on its side wall. The oil collection hole is equipped with an adjustment device for controlling the oil-water ratio. The casing is equipped with an identification module for marking the location of the casing.

[0007] A valve core assembly is slidably connected inside the casing. The valve core assembly is configured to move relative to the casing under the action of fracturing fluid and an electronic tag, so as to sequentially switch from an initial position to a fracturing position and an oil collection position.

[0008] In the initial position, the valve core assembly closes the oil collection hole and the fracturing hole;

[0009] At the fracturing location, a portion of the valve core assembly houses the electronic tag, and the valve core assembly releases the fracturing orifice to allow the fracturing fluid to flow out of the casing through the fracturing orifice.

[0010] At the oil collection position, the valve core assembly closes the fracturing hole and releases the oil collection hole, so that oil and gas flow into the casing through the oil collection hole.

[0011] Optionally, the control device has a liquid control channel, which includes at least one liquid control section and at least one connecting section, wherein the liquid control section and the connecting section are alternately arranged and connected in sequence.

[0012] Optionally, the cross-sectional area of ​​the liquid control section is larger than the cross-sectional area of ​​the connecting section.

[0013] Optionally, the liquid control section and the connecting section are connected by a circular arc transition.

[0014] Optionally, the control device has an inlet channel, the first end of which is connected to the first end of the liquid control channel, and the cross-sectional area of ​​the inlet channel gradually increases from the first end to the second end.

[0015] Optionally, the control device has an outflow channel, the first end of which is connected to the second end of the liquid control channel, and the cross-sectional area of ​​the outflow channel gradually increases from the first end to the second end.

[0016] Optionally, along the inner wall to the outer wall of the casing, the oil collecting hole includes a first hole segment, a second hole segment, and a third hole segment connected in sequence. The diameter of the third hole segment is larger than the diameter of the second hole segment, and the diameter of the second hole segment is larger than the diameter of the first hole segment. The adjusting device is disposed in the second hole segment and abuts against the first hole segment.

[0017] Optionally, the oil collecting hole is inclined, with one end of the oil collecting hole located on the outer wall of the casing inclined toward the fracturing hole.

[0018] Optionally, there are multiple oil collecting holes, which are arranged at intervals along the circumference of the casing.

[0019] Optionally, there are multiple fracturing holes, which are arranged sequentially at intervals along the circumference of the casing, and each fracturing hole corresponds to an oil collecting hole along the axial direction of the casing.

[0020] Optionally, the valve core assembly includes a valve core and a drive member, the valve core is connected to the drive member, the drive member is connected to the inner wall of the sleeve, and the inner wall of the sleeve is further provided with a first locking member;

[0021] When in the fracturing position, the first locking member locks the valve core, and the valve core releases the fracturing orifice. When in the oil collecting position, the first locking member releases the valve core, and the driving member moves the valve core to close the fracturing orifice and release the oil collecting orifice.

[0022] Optionally, the first locking element is a soluble element, which is configured to be dissolved by fracturing fluid within a preset time to release the locking of the valve core.

[0023] Optionally, the inner wall of the casing is further provided with a second locking element. When the oil collection position is reached, the second locking element locks the valve core assembly so that the valve core assembly closes the fracturing hole and releases the oil collection hole.

[0024] Optionally, a shear pin is connected between the valve core assembly and the casing, the shear pin positioning the valve core assembly in a position that closes the oil collection port and the fracturing port, and the shear pin is configured to shear under the action of fracturing fluid.

[0025] Optionally, the valve core assembly is provided with a flexible positioning part, and the inner wall of the sleeve is provided with a first positioning groove, a second positioning groove and a third positioning groove adapted to the positioning part; the first positioning groove, the second positioning groove and the third positioning groove are arranged sequentially at intervals along the axial direction of the sleeve.

[0026] When the positioning part abuts against the first positioning groove, the valve core assembly closes the oil collection hole and the fracturing hole;

[0027] When the positioning part abuts against the second positioning groove, the valve core assembly is located at the oil collection position;

[0028] When the positioning part abuts against the third positioning groove, the valve core assembly is located at the fracturing position.

[0029] Optionally, the sleeve includes a main pipe, a first connecting pipe, and a second connecting pipe. One end of the main pipe is coaxially connected to the first end of the first connecting pipe, and the other end of the main pipe is coaxially connected to the first end of the second connecting pipe. The valve core assembly slides inside the main pipe, and the inner diameters of both the first and second connecting pipes are smaller than the inner diameter of the main pipe.

[0030] Optionally, the second end of the first connecting pipe is provided with a first connecting part communicating with the first connecting pipe, and the second end of the second connecting pipe is provided with a second connecting part, and the first connecting part and the second connecting part can be detachably connected.

[0031] Optionally, the fracturing fluid enters the main pipe through the first connecting pipe, and the identification module is disposed in the first connecting pipe.

[0032] Optionally, a detection chip is provided on the outer wall of the casing. The detection chip has a detection module and a data transmission module. The detection module is used to detect the temperature and pressure outside the wellbore and / or micro-vibration seismic waves during fracturing. The data transmission module is used to transmit the detection data to the electronic tag.

[0033] On the other hand, this application provides a fracturing system including an electronic tag and a fracturing tube, the fracturing tube including at least one of the aforementioned fracturing sleeves.

[0034] The fracturing sleeve provided in this application, when the valve core assembly is not moved, is in its initial position, at which point the valve core assembly seals the oil collection port and the fracturing port to isolate the inside and outside of the casing. After the electronic tag is set on the valve core assembly, the electronic tag and the valve core assembly are fixed relative to each other, thus jointly sealing the casing. Subsequently, after high-pressure fracturing fluid is injected into the casing, because both the oil collection port and the fracturing port are closed, the fracturing fluid can be pressurized within the casing, causing the valve core assembly to move relative to the casing under the action of the fracturing fluid, thereby reaching the fracturing position. Once the valve core assembly reaches the fracturing position, it no longer seals the fracturing port, allowing the fracturing fluid to be released. The pressurized fracturing fluid flows out of the casing from the fracturing port and into the formation, realizing the fracturing operation on the formation corresponding to the fracturing sleeve. After fracturing operations are completed, the pressure of the fracturing fluid is stopped or reduced, allowing the valve core assembly to continue moving relative to the casing and to move to the oil collection position. This allows the valve core assembly to reseal the fracturing orifice and release the oil collection orifice. The oil and gas released from the fracturing formation flow into the casing through the oil collection orifice. Through a control device, the oil-water ratio in the oil and gas can be regulated in the initial stage of entering the sliding sleeve. This changes the oil-water ratio, reducing the water content and increasing the oil content. This effectively prevents preferential water phase breakthrough or channeling, reducing water channeling, and also reduces well flooding by decreasing the amount of water entering the casing. Attached Figure Description

[0035] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0036] Figure 1 This is a three-dimensional structural diagram of a fracturing casing provided in an exemplary embodiment of this application;

[0037] Figure 2 This is a cross-sectional structural diagram of a fracturing casing provided in an exemplary embodiment of this application, wherein the valve core is in the initial position;

[0038] Figure 3This is a cross-sectional structural diagram of a fracturing sleeve provided in an exemplary embodiment of this application, wherein the valve core is at the fracturing position;

[0039] Figure 4 This is a cross-sectional structural diagram of a fracturing casing provided in an exemplary embodiment of this application, wherein the valve core is located at the oil collection position;

[0040] Figure 5 yes Figure 2 A magnified view of point A in the image;

[0041] Figure 6 This is a schematic diagram of the electronic tag being set inside the valve core.

[0042] Figure label:

[0043] 10 - Sleeve; 20 - Valve core assembly; 30 - Electronic tag;

[0044] 100 - Main pipe; 101 - First mounting slot; 102 - Second mounting slot; 103 - First positioning slot; 104 - Second positioning slot; 105 - Third positioning slot; 110 - Oil collecting hole; 111 - First hole section; 112 - Second hole section; 113 - Third hole section; 120 - Fracturing hole; 130 - First locking element; 140 - Second locking element; 150 - Shearing pin; 160 - Temporary sealing element;

[0045] 200 - First connecting pipe; 210 - Identification module; 220 - First connecting part; 230 - Second sealing groove;

[0046] 300 - Second connecting pipe; 310 - Second connecting part; 320 - Third sealing groove;

[0047] 400 - Adjustment control; 410 - Liquid control channel; 411 - Liquid control section; 412 - Connecting section; 420 - Inlet channel; 430 - Outlet channel;

[0048] 500 - Valve core; 510 - Positioning part; 520 - First sealing groove;

[0049] 600-Driver;

[0050] 700-Detection chip.

[0051] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0052] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application.

[0053] The terms “first,” “second,” “third,” “fourth,” etc., as used in this application (if applicable), are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in a sequence other than those illustrated or described herein.

[0054] In this application, the terms "exemplarily" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplarily" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplarily" or "for example" is intended to present the relevant concepts in a specific manner.

[0055] In related technologies, fracturing fluid typically enters the formation through fracturing holes on a sliding sleeve. Before fracturing, the fracturing holes on the sliding sleeve are closed, requiring devices such as ball-dropping, mechanical screw clamps, darts, or electronic tags, along with fracturing fluid pressure buildup, to open them. Once open, fracturing fluid is injected into the designated formation. After fracturing, oil and gas from the formation enter the sliding sleeve through the fracturing holes and are collected at the surface. However, the oil and gas collected using existing technologies contains not only crude oil but also a large amount of mineral-rich geological water and a small amount of fracturing fluid, resulting in low crude oil recovery efficiency.

[0056] The fracturing sleeve and fracturing system provided in this application, by setting an oil collecting port and a fracturing port on the casing, allow the oil collecting port to close and the fracturing port to open during the fracturing process, enabling fracturing fluid to flow out of the fracturing port to the outside of the bottom layer. After fracturing is completed, the oil collecting port opens and the fracturing port closes, allowing oil and gas to enter the casing from the oil collecting port. As the gas passes through the regulating control within the oil collecting port, the oil-water ratio in the oil and gas is regulated, thereby reducing the water content in the oil and gas after regulation, i.e., lowering the proportion of water in the oil-water ratio and increasing the proportion of oil in the oil-water ratio. This improves crude oil recovery efficiency.

[0057] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0058] like Figures 1 to 6 As shown in the figure, this application embodiment provides a fracturing sleeve, which includes a casing 10 and a valve core assembly 20. The sidewall of the casing 10 is provided with an oil collecting hole 110 and a fracturing hole 120 communicating with the casing 10. An adjustment control 400 for controlling the oil-water ratio is provided inside the oil collecting hole 110, and an identification module 210 for identifying the casing's position is provided inside the casing 10. The valve core assembly 20 is slidably connected inside the casing 10 and is configured to move relative to the casing 10 under the influence of fracturing fluid and an electronic tag 30, sequentially switching from an initial position to a fracturing position and then to an oil collecting position. In the initial position, the valve core assembly 20 closes the oil collecting hole 110 and the fracturing hole 120. In the fracturing position, a portion of the valve core assembly 20 accommodates the electronic tag 30, and the valve core assembly 20 releases the fracturing hole 120, allowing the fracturing fluid to flow out of the casing 10 through the fracturing hole 120. At the oil collection position, the valve core assembly 20 closes the fracturing hole 120 and releases the oil collection hole 110, so that oil and gas flow into the casing 10 through the oil collection hole 110.

[0059] It is understood that the fracturing sleeve can be pre-installed in the fracturing tubing and enters the formation along with it, thus enabling the fracturing sleeve to reach the required formation depth beforehand. Different fracturing sleeves correspond to different formation depths. The electronic tag 30 has an identification module for identifying the identification module 210 and a setting mechanism for realizing the setting action. After the electronic tag 30 is inserted into the wellbore from the surface opening of the fracturing tubing, it will enter the fracturing sleeve. When the electronic tag 30 passes the identification module 210 on the casing 10, the identification module on the electronic tag 30 can communicate with the identification module 210 and obtain the current position of the identification module 210 on the casing 10. When the identification module on the electronic tag 30 and the identification module 210 fail to pair successfully, the electronic tag 30 will directly pass through the fracturing sleeve and continue to move. When the identification module on the electronic tag 30 successfully pairs with the identification module 210, the setting mechanism on the electronic tag 30 is activated and sets on the valve core assembly 20 (e.g., Figure 6 (As shown).

[0060] When the valve core assembly 20 is not moved, the valve core assembly 20 is in its initial position (e.g., ...). Figure 2 As shown), at this time, the valve core assembly 20 closes the oil collection port 110 and the fracturing port 120 to isolate the inside and outside of the casing 10. After the electronic tag 30 is set on the valve core assembly 20, the electronic tag 30 and the valve core assembly 20 are relatively fixed, so that the electronic tag 30 and the valve core assembly 20 jointly seal the casing 10. After high-pressure fracturing fluid is subsequently injected into the casing 10, since the oil collection port 110 and the fracturing port 120 are in a closed state, the fracturing fluid can be pressurized in the casing 10, so that the valve core assembly 20 moves relative to the casing 10 under the action of the fracturing fluid, thereby reaching the fracturing position (e.g., as shown). Figure 3(As shown). After the valve core assembly 20 reaches the fracturing position, the valve core assembly 20 no longer blocks the fracturing hole 120, allowing the fracturing hole 120 to be released. The fracturing fluid, after being pressurized, flows out of the casing 10 through the fracturing hole 120 and into the formation, thus realizing the fracturing operation on the formation corresponding to the fracturing sleeve. After the fracturing operation is completed, the pumping of fracturing fluid is stopped or the pressure of the pumped fracturing fluid is reduced, allowing the valve core assembly 20 to continue moving relative to the casing 10 and moving the valve core assembly 20 to the oil collection position (e.g., as shown). Figure 4 As shown in the diagram, the valve core assembly 20 re-closes the fracturing hole 120 and releases the oil collection hole 110. The oil and gas released from the fracturing formation flow into the casing 10 through the oil collection hole 110. After passing through the regulating control 400, the oil-water ratio in the oil and gas changes, reducing the water content and increasing the oil content. This effectively prevents preferential water phase breakthrough or channeling, reducing water channeling, and also reduces well flooding by decreasing the amount of water entering the casing.

[0061] It should be noted that, in the initial position, the valve core assembly 20 closing the oil collecting port 110 and the fracturing port 120 means that, in the initial position, the oil collecting port 110 and the fracturing port 120 are in a closed state. In the fracturing position, the valve core assembly 20 releasing the fracturing port 120 means that, in the fracturing position, the fracturing port 120 is in a conductive state. In the oil collecting position, the valve core assembly 20 closing the fracturing port 120 and releasing the oil collecting port 110 means that, in the oil collecting position, the fracturing port 120 is in a closed state, and the oil collecting port 110 is in a conductive state.

[0062] The sealing / opening of the fracturing hole 120 and the sealing / opening of the oil collecting hole 110 can be achieved directly by the valve core assembly 20 or by other components attached to the valve core assembly 20. This embodiment does not make specific limitations on this.

[0063] It should also be noted that, in this embodiment, the valve core assembly 20 moves axially along the casing 10. As the valve core assembly 20 moves from the initial position to the fracturing position, the fracturing orifice 120 gradually opens. As the valve core assembly 20 moves from the fracturing position to the oil collection position, the fracturing orifice 120 gradually closes. After fracturing is completed, the surface of the electronic tag 30 can be partially dissolved, allowing the electronic tag 30 to release its setting from the valve core assembly, thus enabling the electronic tag 30 to be returned to the ground.

[0064] Of course, in other embodiments, the fracturing orifice 120 may be opened after the valve core assembly 20 reaches the fracturing position and closed after the valve core assembly 20 reaches the oil collection position. This embodiment does not specifically limit this.

[0065] In addition, in this embodiment, the oil collection hole 110 is in a closed state during the process of the valve core assembly 20 moving from the initial position to the fracturing position and when the valve core assembly 20 is in the fracturing position, so as to improve the pressure-holding effect of the fracturing fluid.

[0066] To control the conduction time of the oil collection hole 110, ensuring that it remains open during the transition from the initial position to the fracturing position and during fracturing, in some optional embodiments, a dissolvable temporary seal 160 is provided within the oil collection hole 110. The temporary seal 160 is configured to dissolve within a preset time to open the oil collection hole 110. By controlling the dissolution rate of the temporary seal 160, the conduction time of the oil collection hole 110 can be adjusted.

[0067] Specifically, when the valve core assembly 20 releases the oil collection port 110, fracturing fluid can enter the oil collection port 110 and come into contact with the temporary seal 160. The dissolving agent contained in the fracturing fluid can gradually dissolve the temporary seal 160, thereby making the oil collection port 110 open. When the valve core assembly 20 blocks the oil collection port 110, the dissolving agent cannot enter the oil collection port 110, and the oil collection port 110 is in a closed state.

[0068] Regarding the specific structure of the control unit 400, in some optional embodiments, the control unit 400 has a liquid control channel 410, which includes at least one liquid control section 411 and at least one connecting section 412, with the liquid control section 411 and the connecting section 412 arranged alternately and connected in sequence.

[0069] like Figure 5 As shown, after the regulating control 400 is set inside the oil collecting hole 110, the liquid control channel 410 is connected to the oil collecting hole 110. The oil and gas entering the oil collecting hole 110 must pass through the liquid control channel 410 to reach the casing 10. Inside the liquid control channel 410, since the density of water is greater than that of oil, and oil is insoluble in water, the crude oil and water in the oil and gas usually present a two-phase flow state. The flow velocity of the oil and gas changes when passing through the liquid control section 411 and the connecting section 412, and the flow velocity of the oil and gas in the liquid control section 411 is different from that in the connecting section 412. This causes the crude oil to flow in a horizontal manner and the water to flow in a turbulent manner when the oil and gas flows in the liquid control channel 410. The high-density water will be subject to greater centrifugal force, forced to adhere to the flow channel wall to generate additional frictional resistance and form a higher pressure drop, while the relatively low-density oil can more easily pass through the swirling center region, maintaining a higher flow velocity and a lower pressure drop. This significantly reduces the water phase production. Within the same time frame, the water content in the oil and gas flowing out through the control valve 400 decreases while the oil content increases, thus achieving the water control function of reducing the water content in the oil and gas.

[0070] By setting the control panel, the following effects can be achieved:

[0071] Firstly, it can reduce the water content and decrease water channeling. By rationally designing the size and structure of the liquid control channel 410 within the control unit 400, it can effectively prevent the water phase from preferentially breaking through or flowing through in the initial stage, thereby mitigating water cone and water channeling phenomena and reducing the water content within the sleeve 10.

[0072] Secondly, it extends the stable production period and improves the recovery rate. By restricting water entry into the casing, the oil well can maintain a lower water cut and a higher oil production for a longer period, thus extending the economically stable production period and improving the final recovery rate of the oil well.

[0073] Thirdly, it reduces the cost of produced water treatment and injection. Lowering the water content reduces the operating and maintenance costs of equipment in areas such as surface separation, treatment, and water reinjection. Simultaneously, reducing the amount of produced water also lightens the load on surface process facilities and lowers energy consumption.

[0074] Fourthly, improving formation energy utilization efficiency. When the water phase enters casing 10 too early or in excessive amounts, it will carry away formation energy, leading to a decrease in oil production. By using control valve 400, more formation energy can be used to displace crude oil, increasing crude oil production in the wellbore.

[0075] Fifthly: Improve wellbore production profile and avoid premature well shutdown. When affected by formation heterogeneity, some formations are prone to water flooding or water cone formation. Adjusting the control 400 can balance the flow rate of each section, reduce the problem of excessively rapid water ingress in a single layer, avoid forced well shutdown due to excessive water content in local sections, and improve overall oil production efficiency.

[0076] Sixth aspect: Reduce well workover frequency and overall operating costs. By reducing the risk of flooding and downhole failures caused by rapid water intrusion, the number of potential water shut-off, perforation, or other well workover operations can be reduced, thereby lowering subsequent maintenance and repair costs.

[0077] Optionally, the cross-sectional area of ​​the liquid control section 411 and the cross-sectional area of ​​the connecting section 412 are different, so that after the oil and gas enter the connecting section 412 from the liquid control section 411 or after the oil and gas enter the liquid control section 411 from the connecting section 412, the difference between the flow velocity of crude oil and the flow velocity of water increases, thereby improving the turbulence effect of water and further reducing the water content in the oil and gas.

[0078] Optionally, the cross-sectional area of ​​the liquid control section 411 is larger than the cross-sectional area of ​​the connecting section 412.

[0079] In some alternative embodiments, the liquid control section 411 and the connecting section 412 are connected by an arc transition. By connecting the liquid control section 411 and the connecting section 412 by an arc transition, the resistance during the oil and gas flow process can be reduced.

[0080] like Figure 5As shown, regarding the specific shape of the liquid control section 411, in some optional embodiments, the liquid control section 411 can be spherical, thereby causing the flow rate of oil and gas within the liquid control section 411 to change.

[0081] In some alternative embodiments, the control device 400 has an inlet channel 420, the first end of which is connected to the first end of the liquid control channel 410, and the cross-sectional area of ​​the inlet channel 420 gradually increases along the direction from the first end to the second end of the inlet channel 420.

[0082] After the inlet channel 420 is set, the oil and gas will enter the liquid control channel 410 through the oil inlet channel and be pre-accelerated in the oil inlet channel, thereby improving the water control effect of the oil and gas in the liquid control channel.

[0083] In some alternative embodiments, the control device 400 has an outflow channel 430, the first end of which is connected to the second end of the liquid control channel 410, and the cross-sectional area of ​​the outflow channel 430 gradually increases from the first end to the second end.

[0084] After the outflow channel 430 is set, the oil and gas from the liquid control channel 410 will flow into the casing 10 through the outflow channel 430 and be accelerated out of the outflow channel 430, further improving the oil and gas collection efficiency.

[0085] like Figure 5 As shown, in some optional embodiments, along the direction from the inner wall to the outer wall of the casing 10, the oil collecting hole 110 includes a first hole section 111, a second hole section 112 and a third hole section 113 connected in sequence. The diameter of the third hole section 113 is larger than the diameter of the second hole section 112, and the diameter of the second hole section 112 is larger than the diameter of the first hole section 111. The adjusting control 400 is disposed in the second hole section 112 and abuts against the first hole section 111.

[0086] By setting the diameter of the third orifice 113 to be larger than that of the second orifice 112, and setting the diameter of the second orifice 112 to be larger than that of the first orifice 111, the adjustment control 400 can be inserted into the second orifice 112 from the third orifice 113 and installed inside the second orifice 112. Furthermore, since the adjustment control 400 abuts against the first orifice 111, the flow direction of oil and gas is from the third orifice 113 to the first orifice 111. Therefore, the adjustment control 400 will not fall off the sleeve 10 during use.

[0087] To prevent the oil collecting port 110 and fracturing port 120 from being blocked by cementing material during cementing, in some optional embodiments, a first sealing element is provided at the end of the oil collecting port 110 connecting to the outside of the casing 10, and a second sealing element is provided at the end of the fracturing port 120 connecting to the outside of the casing 10. The first sealing element can block the oil collecting port 110, and the second sealing element can temporarily block the fracturing port 120, preventing the oil collecting port 110 and fracturing port 120 from being blocked by cementing material during cementing. Furthermore, the first sealing element is configured to detach from the oil collecting port 110 under the agitation of fracturing fluid, and the second sealing element is configured to detach from the fracturing port 120 under the agitation of fracturing fluid. Thus, during the fracturing process, the first sealing element and the second sealing element can automatically detach.

[0088] Optionally, the first and second sealing components include, but are not limited to, grease, foam plastics, and resins.

[0089] Optionally, when the oil collecting hole 110 includes the first hole section 111, the second hole section 112 and the third hole section 113 as described above, the first sealing member is provided in the third hole section 113.

[0090] In some alternative embodiments, the oil collecting hole 110 is inclined, with one end of the oil collecting hole 110 located on the outer wall of the casing 10 inclined toward the fracturing hole 120.

[0091] Since fracturing fluid enters the formation fracture through fracturing hole 120, the oil and gas in the fracturing formation can also flow along the formation fracture. Therefore, the end of oil collecting hole 110 located on the outer wall of casing 10 is tilted towards fracturing hole 120, so that the distance between the end of oil collecting hole 110 located on the inner wall of casing 10 and fracturing hole 120 is greater than the distance between the end of oil collecting hole 110 located on the outer wall of casing 10 and fracturing hole 120. This allows the oil and gas flowing out from the fracturing fracture to quickly enter oil collecting hole 110, reducing the travel distance of oil and gas in the formation and improving the oil and gas collection efficiency.

[0092] In some alternative embodiments, the distance between the oil collecting hole 110 and the end of the casing 10 through which fracturing fluid enters is less than the distance between the fracturing hole 120 and the end of the casing 10 through which fracturing fluid enters. This is so that the oil collecting hole 110 is located upstream of the fracturing hole 120, and the angle between the inclination direction of the oil collecting hole 110 and the flow direction of oil and gas within the casing 10 is less than 90°, thereby allowing oil and gas to more easily enter the casing 10 through the oil collecting hole 110.

[0093] It is understood that when the distance between the oil collecting hole 110 and the end of the casing 10 through which the fracturing fluid is introduced is less than the distance between the fracturing hole 120 and the end of the casing 10 through which the fracturing fluid is introduced, the oil collecting position is located between the initial position and the fracturing position. The direction of movement of the valve core assembly 20 from the initial position to the fracturing position is the first direction, and the direction of movement of the valve core 500 from the fracturing position to the oil collecting position is the second direction. Both the first and second directions are axial directions of the casing 10, and the first and second directions are opposite.

[0094] like Figure 1 As shown, optionally, there are multiple oil collecting holes 110, which are arranged sequentially at intervals along the circumference of the casing 10. Multiple oil collecting holes 110 can collect oil and gas from different directions in the same formation, thereby improving oil and gas collection efficiency.

[0095] like Figure 1 As shown, in some optional embodiments, there are multiple fracturing holes 120, which are arranged sequentially at intervals along the circumference of the casing 10. Providing multiple fracturing holes 120 allows fracturing fluid to enter different directions at the same formation depth, thereby forming more fractures and improving oil and gas collection efficiency.

[0096] like Figure 1 As shown, in order to further improve the oil and gas collection efficiency, in some optional embodiments, along the axial direction of the casing 10, the fracturing hole 120 corresponds one-to-one with the oil collecting hole 110. In this way, each oil collecting hole 110 corresponds to one fracturing hole 120, and the distance between the oil collecting hole 110 and the corresponding fracturing hole 120 is smaller, making it easier to collect the oil and gas flowing out from the fracturing hole.

[0097] like Figures 2 to 4 As shown, regarding the specific structure of the valve core assembly 20, in some optional embodiments, the valve core assembly 20 includes a valve core 500 and a drive member 600. The valve core 500 is connected to the drive member 600, and the drive member 600 is connected to the inner wall of the casing 10. The inner wall of the casing 10 is also provided with a first locking member 130. In the fracturing position, the first locking member 130 locks the valve core 500, and the valve core 500 releases the fracturing hole 120. In the oil collecting position, the locking member releases the valve core 500, and the drive member 600 drives the valve core 500 to move, so that the valve core 500 closes the fracturing hole 120 and releases the oil collecting hole 110.

[0098] It is understood that the valve core 500 is used to block or release the fracturing orifice 120 and the oil collection orifice 110, and the drive member 600 is used to move the valve core 500. The first locking member 130 can lock the valve core 500 when it is in the oil collection position, preventing the valve core 500 from moving and causing the fracturing orifice 120 to be partially or completely blocked by the valve core 500, so that the fracturing orifice 120 can remain in a released state. Furthermore, after fracturing is completed, the first locking member 130 releases the lock on the valve core 500, so that after fracturing, the drive member 600 can push the valve core 500 from the fracturing position to the oil collection position.

[0099] In some alternative embodiments, the outer wall of the valve core 500 and / or the inner wall of the sleeve 10 are provided with a first sealing groove 520, and a sealing ring is installed in the first sealing groove 520. The valve core 500 and the sleeve 10 are slidably sealed together by the sealing ring.

[0100] In this embodiment, the first sealing groove 520 is circumferentially disposed on the outer wall of the valve core 500, thereby enabling the valve core 500 to maintain a sealed connection with the sleeve 10.

[0101] Optionally, the first locking member 130 is elastic, and a first mounting groove 101 for mounting the first locking member 130 is provided within the sleeve 10, with the first locking member 130 mounted within the first mounting groove 101. In the initial position, the valve core 500 closes the first mounting groove 101, so that the first locking member 130 elastically abuts against the outer wall of the valve core 500. In the fracturing position, the valve core 500 releases the first mounting groove 101, causing the first locking member 130 to pop outward, and the portion of the first locking member 130 that pops out of the first mounting groove 101 is located on the movement path of the valve core 500 from the fracturing position to the oil collecting position, thereby restricting the movement of the valve core 500 to the oil collecting position. Optionally, the first mounting groove 101 is located on the movement path of the valve core 500 from the fracturing position to the oil collecting position.

[0102] Optionally, the distance between the first mounting groove 101 and the end of the casing 10 through which the fracturing fluid enters is greater than the distance between the fracturing hole 120 and the end of the casing 10 through which the fracturing fluid enters. This allows the first locking member 130 to restrict the valve core 500 from approaching the fracturing hole 120 after the valve core 500 releases the first mounting groove 101. When the end face of the valve core 500 abuts against the first locking member 130, the valve core 500 reaches the fracturing position.

[0103] In some alternative embodiments, the first locking element 130 is a soluble element, which is disposed within a preset space and dissolved by fracturing fluid to release the locking valve core 500.

[0104] It is understood that the fracturing fluid can be mixed with a dissolving liquid that can dissolve the first locking element 130. After the dissolving liquid comes into contact with the first locking element, it gradually dissolves the first locking element 130. When the first locking element 130 has dissolved for a preset time, the first locking element 130 can no longer provide locking function for the valve core 500, and thus the first locking element 130 releases the locking of the valve core 500.

[0105] The preset time for dissolving the first locking element 130 can be obtained by adjusting the concentration of the dissolving solution.

[0106] Regarding the specific structure of the driving member 600 in this embodiment, in some optional implementations, the first driving member 600 is an annular elastic member, and the first mounting groove 101 is an annular groove arranged circumferentially along the inner wall of the casing 10. The first driving member 600 achieves elastic deformation through diameter variation. Specifically, the inner diameter of the first driving member 600 in its natural state is smaller than the outer diameter of the valve core 500. By expanding the first driving member 600 and fitting it onto the outer wall of the valve core 500, the elastic potential energy of the first driving member 600 is increased, and the first driving member 600 elastically abuts against the outer wall of the valve core 500. Furthermore, under the restriction of the first mounting groove 101, the driving member 600 cannot move axially along the casing 10. Therefore, when the valve core 500 moves axially along the casing 10 under the action of fracturing fluid, the valve core 500 will move relative to the first driving member 600. When the valve core 500 separates from the first mounting groove 101 to release the first mounting groove 101, the first locking member 130 will reduce its diameter under the action of elastic potential energy, so that the valve core 500 can no longer pass through the first locking member 130. Through cooperation with the driving member 600, the locking function of the valve core 500 is realized.

[0107] Of course, in other embodiments, the first locking member 130 can also be driven by other driving devices so that the first locking member 130 can switch between the position of locking valve core 500 and the position of releasing locking valve core 500. For example, an electrically driven telescopic rod.

[0108] In some optional embodiments, the inner wall of the casing 10 is further provided with a second locking member 140. In the oil collecting position, the second locking member 140 locks the valve core assembly 20, causing the valve core assembly 20 to close the fracturing hole 120 and release the oil collecting hole 110. The second locking member 140 is provided to lock the valve core assembly 20 in the oil collecting position, thereby preventing the valve core assembly 20 from continuing to move and closing the oil collecting hole 110. When the valve core assembly 20 includes a valve core 500 and a drive member 600, the second locking member 140 locks the valve core 500.

[0109] Regarding the specific structure of the second locking member 140, the second locking member 140 can be an elastic element, and a second mounting groove 102 is provided on the inner wall of the sleeve 10. The second mounting groove 102 is used to accommodate the second locking member 140. The second mounting groove 102 is located between the fracturing hole 120 and the oil collecting hole 110. In the initial position, the valve core 500 in the valve core assembly 20 closes the second mounting groove 102 so that the second locking member 140 elastically abuts against the outer wall of the valve core 500. In the fracturing position, the valve core assembly 20 releases the second mounting groove 102 so that the second locking member 140 pops outward, and the part of the second locking member 140 that pops out of the second mounting groove 102 is located on the movement path of the valve core assembly 20 from the fracturing position to the oil collecting position. When the end face of the valve core 500 abuts against the second locking member 140, the valve core assembly 20 reaches the oil collecting position.

[0110] Optionally, the second mounting groove 102 can be an annular groove axially arranged around the sleeve 10, and the second locking member 140 can be an annular elastic member, wherein the inner diameter of the second locking member 140 in its natural state is smaller than the outer diameter of the valve core 500. By expanding the second driving member 600 and fitting it onto the outer wall of the valve core 500, the elastic potential energy of the second driving member 600 is increased, and the second driving member 600 elastically abuts against the outer wall of the valve core 500.

[0111] In some alternative embodiments, a shear pin 150 is connected between the valve core assembly 20 and the casing 10. The shear pin 150 positions the valve core assembly 20 in a position that closes the oil collection hole 110 and the fracturing hole 120. The shear pin 150 is configured to shear under the action of fracturing fluid.

[0112] It can be understood that the initial position of the valve core assembly 20, which is located in the closed position between the oil collection port 110 and the fracturing port 120, is sufficient. When the shear pin 150 is not sheared, the valve core assembly 20 can close the oil collection port 110 and the fracturing port 120. After the shear pin 150 is sheared, the valve core assembly 20 can move relative to the casing 10. When the valve core assembly 20 includes the valve core 500 and the drive element 600, the shear pin 150 connects the valve core 500 and the casing 10.

[0113] In some optional embodiments, the valve core assembly 20 is provided with a resilient positioning portion 510, and the inner wall of the sleeve 10 is provided with a first positioning groove 103, a second positioning groove 104, and a third positioning groove 105 adapted to the positioning portion 510; the first positioning groove 103, the second positioning groove 104, and the third positioning groove 105 are arranged sequentially at intervals along the axial direction of the sleeve 10. When the positioning portion 510 abuts against the first positioning groove 103, the valve core assembly 20 closes the oil collecting hole 110 and the fracturing hole 120; when the positioning portion 510 abuts against the second positioning groove 104, the valve core assembly 20 is located in the oil collecting position; when the positioning portion 510 abuts against the third positioning groove 105, the valve core assembly 20 is located in the fracturing position.

[0114] The positioning part 510 enables pre-positioning between the valve core assembly 20 and the sleeve 10. Specifically, when the positioning part 510 abuts in the first positioning groove 103, the valve core assembly 20 is in its initial position. When the positioning part 510 abuts in the second positioning groove 104, the valve core assembly 20 is in the oil collecting position; when the positioning part 510 abuts in the third positioning groove 105, the valve core assembly 20 is in the fracturing position. When the valve core assembly 20 includes a valve core 500 and a drive member 600, the elastic positioning part is provided on the valve core 500.

[0115] Furthermore, under the action of fracturing fluid, the positioning part 510 can detach from the corresponding first positioning groove 103, second positioning groove 104, or third positioning groove 105.

[0116] In some alternative embodiments, the sleeve 10 includes a main pipe 100, a first connecting pipe 200, and a second connecting pipe 300. One end of the main pipe 100 is coaxially connected to the first end of the first connecting pipe 200, and the other end of the main pipe 100 is coaxially connected to the first end of the second connecting pipe 300. The valve core assembly 20 slides inside the main pipe 100. The inner diameter of the first connecting pipe 200 and the inner diameter of the second connecting pipe 300 are both smaller than the inner diameter of the main pipe 100.

[0117] By configuring the sleeve 10 as a connected first connecting pipe 200, main pipe 100, and second connecting pipe 300, the installation of the valve core assembly 20 can be facilitated. Furthermore, by making the inner diameters of both the first connecting pipe 200 and the second connecting pipe 300 smaller than the inner diameter of the main pipe 100, the first ends of both the first and second connecting pipes can limit the movement of the valve core assembly 20.

[0118] Regarding the specific connection method between the main pipe 100 and the first connecting pipe 200 and the second connecting pipe 300, in some optional embodiments, one end of the main pipe 100 is plugged into the first connecting pipe 200, and the other end of the main pipe 100 is plugged into the second connecting pipe 300.

[0119] Specifically, in this embodiment, the first end of the first connecting pipe 200 and the first end of the second connecting pipe 300 are respectively inserted into the two ends of the main pipe 100.

[0120] To improve the sealing performance of the first connecting pipe 200 and the second connecting pipe 300 after being inserted into the main pipe 100, an annular second sealing groove 230 is provided on the outer wall of the first end of the first connecting pipe 200, and an annular sealing ring is provided inside the second sealing groove 230, so that the first end of the first connecting pipe 200 and the main pipe 100 can be sealed together by the annular sealing ring. An annular third sealing groove 320 is provided on the outer wall of the first end of the second connecting pipe 300, and an annular sealing ring is provided inside the third sealing groove 320, so that the first end of the second connecting pipe 300 and the main pipe 100 can be sealed together by the annular sealing ring.

[0121] In some alternative embodiments, the second end of the first connecting pipe 200 is provided with a first connecting portion 220 communicating with the first connecting pipe 200, and the second end of the second connecting pipe 300 is provided with a second connecting portion 310, wherein the first connecting portion 220 and the second connecting portion 310 can be detachably connected.

[0122] When there are multiple fracturing casings 10, the first connecting part 220 on one of the fracturing casings 10 can be connected to the second connecting part 310 on the other fracturing casing 10 to achieve rapid connection between the two adjacent fracturing casings 10.

[0123] Optionally, the first connecting part 220 can be either a socket or an annular slot, and the second connecting part 310 can be either a socket or an annular slot, with the plug-in part being adapted to the socket.

[0124] When there are multiple fracturing casings 10, the insertion part on one of the fracturing casings 10 can be inserted into the insertion hole of the other fracturing casing 10 to achieve rapid connection between the two adjacent fracturing casings 10.

[0125] In some alternative embodiments, fracturing fluid enters main pipe 100 via first connecting pipe 200, and identification module 210 is disposed in first connecting pipe 200.

[0126] By placing the identification module 210 on the first connecting pipe 200, the electronic tag 30 can be identified by the identification module after entering the fracturing sleeve.

[0127] In some alternative embodiments, a detection chip 700 is provided on the outer wall of the casing 10. The detection chip 700 has a detection module and a data transmission module. The detection module is used to detect the temperature and pressure outside the wellbore and / or micro-vibration seismic waves during fracturing. The data transmission module is used to transmit the detection data to the electronic tag 30. After the electronic tag 30 is returned to the surface, it will transmit the information detected by the detection chip 700 back to the surface.

[0128] Based on the fracturing sleeve described above, this application embodiment also provides a fracturing system, including an electronic tag 30 and a fracturing tube, the fracturing tube including at least one of the aforementioned fracturing sleeves.

[0129] It is understandable that, because the fracturing system has a fracturing sleeve, the fracturing system can achieve all the above-mentioned functions of the fracturing sleeve and all the above-mentioned technical effects of the fracturing sleeve.

[0130] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein.

[0131] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope.

Claims

1. A fracturing sleeve, characterized in that, include: A casing (10) is provided with an oil collecting hole (110) and a fracturing hole (120) communicating with the casing (10) on its side wall. An adjustment control (400) for controlling the oil-water ratio is provided in the oil collecting hole (110). An identification module (210) for identifying the location of the casing (10) is provided in the casing (10). The valve core assembly (20) is slidably connected inside the casing (10). The valve core assembly (20) is configured to move relative to the casing (10) under the action of fracturing fluid and electronic tag (30) to sequentially switch from the initial position to the fracturing position and the oil collection position. In the initial position, the valve core assembly (20) closes the oil collection hole (110) and the fracturing hole (120); At the fracturing location, a portion of the valve core assembly (20) houses the electronic tag (30), and the valve core assembly (20) releases the fracturing orifice (120) to allow the fracturing fluid to flow out of the casing (10) through the fracturing orifice (120); At the oil collection position, the valve core assembly (20) closes the fracturing hole (120) and releases the oil collection hole (110) so that oil and gas flow into the casing (10) through the oil collection hole (110).

2. The fracturing sleeve according to claim 1, characterized in that, The control unit (400) has a liquid control channel (410), which includes at least one liquid control section (411) and at least one connecting section (412). The liquid control section (411) and the connecting section (412) are alternately arranged and connected in sequence.

3. The fracturing sleeve according to claim 2, characterized in that, The cross-sectional area of ​​the liquid control section (411) is greater than the cross-sectional area of ​​the connecting section (412).

4. The fracturing sleeve according to claim 2, characterized in that, The liquid control section (411) and the connecting section (412) are connected by a circular arc transition.

5. The fracturing sleeve according to claim 2, characterized in that, The control unit (400) has an inlet channel (420), the first end of which is connected to the first end of the liquid control channel (410), and the cross-sectional area of ​​the inlet channel (420) gradually increases from the first end to the second end.

6. The fracturing sleeve according to claim 2, characterized in that, The control unit (400) has an outflow channel (430), the first end of which is connected to the second end of the liquid control channel (410). The cross-sectional area of ​​the outflow channel (430) gradually increases from the first end to the second end.

7. The fracturing sleeve according to claim 1, characterized in that, Along the inner wall to the outer wall of the sleeve (10), the oil collecting hole (110) includes a first hole section (111), a second hole section (112) and a third hole section (113) connected in sequence. The diameter of the third hole section (113) is larger than the diameter of the second hole section (112), and the diameter of the second hole section (112) is larger than the diameter of the first hole section (111). The adjusting device (400) is disposed in the second hole section (112) and abuts against the first hole section (111).

8. The fracturing sleeve according to claim 1, characterized in that, The oil collecting hole (110) is inclined, and one end of the oil collecting hole (110) located on the outer wall of the casing (10) is inclined toward the fracturing hole (120).

9. The fracturing sleeve according to claim 1, characterized in that, There are multiple oil collecting holes (110), and the multiple oil collecting holes (110) are arranged sequentially at intervals along the circumference of the sleeve (10).

10. The fracturing sleeve according to claim 9, characterized in that, There are multiple fracturing holes (120), and the multiple fracturing holes (120) are arranged sequentially at intervals along the circumference of the casing (10). Along the axial direction of the casing (10), the fracturing holes (120) correspond one-to-one with the oil collecting holes (110).

11. The fracturing sleeve according to claim 1, characterized in that, The valve core assembly (20) includes a valve core (500) and a drive member (600). The valve core (500) is connected to the drive member (600), and the drive member (600) is connected to the inner wall of the sleeve (10). The inner wall of the sleeve (10) is also provided with a first locking member (130). When in the fracturing position, the first locking member (130) locks the valve core (500), and the valve core (500) releases the fracturing orifice (120). When in the oil collecting position, the first locking member (130) releases the valve core (500), and the driving member (600) drives the valve core (500) to move so that the valve core (500) closes the fracturing orifice (120) and releases the oil collecting orifice (110).

12. The fracturing sleeve according to claim 11, characterized in that, The first locking element (130) is a soluble element, which is configured to be dissolved by fracturing fluid within a preset time to release the locking of the valve core (500).

13. The fracturing sleeve according to claim 1, characterized in that, The inner wall of the casing (10) is also provided with a second locking member (140). When the oil collection position is in the second locking member (140), the second locking member (140) locks the valve core assembly (20) so that the valve core assembly (20) closes the fracturing hole (120) and releases the oil collection hole (110).

14. The fracturing sleeve according to claim 1, characterized in that, A shear pin (150) is connected between the valve core assembly (20) and the casing (10). The shear pin (150) positions the valve core assembly (20) in a closed position between the oil collection hole (110) and the fracturing hole (120). The shear pin (150) is configured to shear under the action of fracturing fluid.

15. The fracturing sleeve according to claim 1, characterized in that, The valve core assembly (20) is provided with an elastic positioning part (510), and the inner wall of the sleeve (10) is provided with a first positioning groove (103), a second positioning groove (104) and a third positioning groove (105) adapted to the positioning part (510); the first positioning groove (103), the second positioning groove (104) and the third positioning groove (105) are arranged sequentially at intervals along the axial direction of the sleeve (10); When the positioning part (510) abuts against the first positioning groove (103), the valve core assembly (20) closes the oil collection hole (110) and the fracturing hole (120); When the positioning part (510) abuts against the second positioning groove (104), the valve core assembly (20) is located at the oil collection position; When the positioning part (510) abuts against the third positioning groove (105), the valve core assembly (20) is located at the fracturing position.

16. The fracturing sleeve according to claim 1, characterized in that, The sleeve (10) includes a main pipe (100), a first connecting pipe (200), and a second connecting pipe (300). One end of the main pipe (100) is coaxially connected to the first end of the first connecting pipe (200), and the other end of the main pipe (100) is coaxially connected to the first end of the second connecting pipe (300). The valve core assembly (20) slides inside the main pipe (100). The inner diameter of the first connecting pipe (200) and the inner diameter of the second connecting pipe (300) are both smaller than the inner diameter of the main pipe (100).

17. The fracturing sleeve according to claim 16, characterized in that, The second end of the first connecting pipe (200) is provided with a first connecting part (220) communicating with the first connecting pipe (200), and the second end of the second connecting pipe (300) is provided with a second connecting part (310). The first connecting part (220) and the second connecting part (310) can be detachably connected.

18. The fracturing sleeve according to claim 16, characterized in that, The fracturing fluid enters the main pipe (100) through the first connecting pipe (200), and the identification module (210) is installed in the first connecting pipe (200).

19. The fracturing sleeve according to any one of claims 1-17, characterized in that, The outer wall of the casing (10) is provided with a detection chip (700). The detection chip (700) has a detection module and a data transmission module. The detection module is used to detect the temperature and pressure outside the wellbore and / or micro-vibration seismic waves during fracturing. The data transmission module is used to transmit the detection data to the electronic tag (30).

20. A fracturing system, characterized in that, It includes an electronic tag (30) and a fracturing tube, the fracturing tube including at least one fracturing sleeve as claimed in any one of claims 1-19.

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