A force-enhanced opening type intelligent fracturing sliding sleeve system

Abstract

The present application relates to the technical field of fracturing sliding sleeve, more particularly to a force-increasing opening type intelligent fracturing sliding sleeve system. In order to improve the cementation during well cementation, which causes the sliding sleeve to be stuck when it is opened, the present application aims to provide a fracturing sliding sleeve tool which can not be limited by fracturing stages and can increase force independently when it is opened for the first time. The displacement intelligent tag unit is clamped in front of the target intelligent fracturing sliding sleeve unit in a pressure balance state. After clamping, the central passage of the target intelligent fracturing sliding sleeve unit is blocked, so that the pressure on both sides of the axis of the intelligent tag unit in the target intelligent fracturing sliding sleeve unit is relatively independent. Due to the blockage of the central passage in the target intelligent fracturing sliding sleeve unit, the equivalent stress area near the wellhead end is greater than that away from the wellhead end, so a downward pushing force is generated to push the intelligent tag unit. After the ground pump truck reaches the locking mechanism limited pressure, the intelligent fracturing sliding sleeve can be opened.

Description

Technical Field

[0001] This invention relates to the field of fracturing sleeve technology, and more specifically to a force-enhancing opening intelligent fracturing sleeve system. Background Technology

[0002] Currently, the number of low-permeability oil and gas fields under development in my country is gradually increasing, while the number of exploitable medium- and high-permeability oil and gas fields is decreasing. Traditional technologies are difficult to effectively develop these fields, making staged fracturing a particularly important technique in oil and gas field development. The fracturing sleeve is currently the key component of staged fracturing tools, and its performance directly affects the quality of staged fracturing, thus impacting the oil and gas production efficiency of wells. Commonly used staged fracturing techniques include: ball-drop fracturing sleeves, pump-driven bridge plug perforation fracturing, and coiled tubing hydraulic jet fracturing. Among these, the ball-drop fracturing sleeve is the most widely used. Its significant drawback is that the sleeves must be arranged from smallest to largest size to perform fracturing operations, thus limiting the number of sleeves used in a single well and restricting the number of fracturing layers. Furthermore, cement consolidation during cementing can easily occur, causing jamming when the sleeves open. After the ball-drop operation is completed, surface wellhead pressure limitations prevent the application of higher pressure to open the sleeves. Summary of the Invention

[0003] The present invention provides a force-enhancing opening intelligent fracturing sliding sleeve system, the purpose of which is to provide a fracturing sliding sleeve tool that is not limited by the number of fracturing stages and can autonomously enhance force upon first opening.

[0004] The above objectives are achieved through the following technical solutions:

[0005] A smart tag unit includes a smart tag unit body, a locking device fixed to the smart tag unit body, and a guide compression module that drives the locking device to expand.

[0006] It also includes a control module for controlling the guided compression module, and a battery module for supplying power to the guided compression module and the control module.

[0007] The main body of the smart tag unit is a cylinder with a rounded protrusion at the bottom.

[0008] A smart fracturing sliding sleeve unit includes an outer sleeve, a fracturing hole disposed on the outer sleeve, a locking mechanism fixedly connected to the outer sleeve, a slide rail disposed inside the outer sleeve, an inner sleeve slidably connected inside the slide rail, the inner sleeve being locked by the locking mechanism, the inner sleeve being used to seal the fracturing hole, and a smart tag unit being able to pass through the outer sleeve and the inner sleeve, and being able to be locked inside the inner sleeve when the smart tag unit expands.

[0009] An induction ring is installed on the outer or inner sleeve.

[0010] The outer sleeve includes an upper sleeve and a lower sleeve detachably connected to the lower end of the upper sleeve. The inner wall of the lower sleeve is provided with a first expansion section and a second expansion section from top to bottom. The inner diameter of the first expansion section is larger than that of the second expansion section to form a first shoulder and a second shoulder from top to bottom. The fracturing hole is provided on the lower sleeve.

[0011] At least three sealing rings are provided on the outer wall of the inner sleeve. The three sealing rings are distributed from top to bottom on the upper side of the fracturing hole, between the locking mechanism and the position before the outer diameter of the inner sleeve is reduced, and on the lower side of the first shoulder.

[0012] The locking mechanism is a shear pin, fixed to the outer sleeve and locked to the inner sleeve; or, the locking mechanism includes a plug, the inner end of which is fixed to the outer end of a compression spring, the inner end of which is fixed to a locking element, and a radial groove on the outer sleeve for mounting the locking mechanism, so that the plug is fixed inside the wall of the outer sleeve, the compression spring can extend and retract within the radial groove, and the locking element can also move radially within the radial groove, and the locking element is locked to the inner sleeve; or, the locking mechanism is an elastic spring or a retaining spring, the locking mechanism is fixed to the inner sleeve, and the locking mechanism is locked in the radial groove formed between the lower sleeve and the upper sleeve, or, the locking mechanism is locked in the radial groove on the lower sleeve;

[0013] When the locking mechanism includes a locking element, the locking element is a wedge, ball, or double-beveled body.

[0014] A method for opening a force-enhancing intelligent fracturing sleeve includes the following steps:

[0015] Step 1: Initially, there are no blockages in the central channel of the intelligent fracturing sliding sleeve unit. The upper and lower surfaces of the intelligent fracturing sliding sleeve unit are connected by the central channel, and the intelligent fracturing sliding sleeve unit is in a state of pressure balance.

[0016] Step 2: After the smart tag unit is locked onto the target smart fracturing sliding sleeve unit, the central channel of the target smart fracturing sliding sleeve unit is blocked, causing the pressure inside the target smart fracturing sliding sleeve unit and on both sides of the axis of the smart tag unit to be relatively independent. Because the equivalent force-bearing area near the wellhead is greater than that away from the wellhead at the blockage of the central channel inside the target smart fracturing sliding sleeve unit, a downward thrust will be generated to push the smart tag unit. After the pressure is reached by the ground pump truck to the limit pressure of the locking mechanism, the smart fracturing sliding sleeve can be opened.

[0017] The beneficial effects of the force-enhancing opening intelligent fracturing sliding sleeve system of the present invention are as follows:

[0018] 1. Once the main body of the intelligent tag unit is locked in place, it can break the pressure balance and autonomously generate the thrust to open the intelligent fracturing sliding sleeve unit, thereby reducing the pressure applied by the surface pump truck. In oil and gas wells with low wellhead pressure limits, the intelligent fracturing sliding sleeve unit can still be opened smoothly.

[0019] 2. Effectively improves the anti-cement consolidation effect of the intelligent fracturing sliding sleeve in the well, and enhances the first opening of the intelligent fracturing sliding sleeve unit.

[0020] 3. The boosting structure is relatively simple and requires no manual operation. Boosting can be achieved through downhole pressure and intelligent opening tools. It is simple to process and has low manufacturing cost.

[0021] 4. This invention only requires hydraulic drive to complete a series of construction tasks, resulting in low construction costs and high efficiency. Attached Figure Description

[0022] Figure 1 This diagram shows the fracturing hole 2-2 of the booster-opening intelligent fracturing sleeve system when it is closed;

[0023] Figure 2 This shows a schematic diagram of the fracturing hole 2-2 of the booster-opening intelligent fracturing sliding sleeve system when it is open;

[0024] Figure 3 A schematic diagram of the upper casing, lower casing 2-1, and fracturing hole 2-2 is shown;

[0025] Figure 4 A schematic diagram of an embodiment of the locking mechanism is shown;

[0026] Figure 5 A schematic diagram of Embodiment 2 of the locking mechanism is shown;

[0027] Figure 6 The diagram shown is a schematic representation of Embodiment 3 of the locking mechanism;

[0028] Figure 7 The diagram shown is a schematic representation of Embodiment 4 of the locking mechanism;

[0029] Figure 8 A schematic diagram of embodiment five of the locking mechanism is shown;

[0030] Figure 9 The diagram shown is a schematic of a smart tag unit;

[0031] Figure 10 Shown Figure 1 Enlarged view of point A in the middle;

[0032] Figure 11 Shown Figure 2 Enlarged view of point B in the middle;

[0033] Figure 12 The schematic diagram of the intelligent tag unit opening the target intelligent fracturing sliding sleeve unit is shown;

[0034] Figure 13This diagram shows the force-bearing areas of the upper and lower end faces of the inner sleeve 4-1.

[0035] Figure 14 and 15 A schematic diagram of the gas absorption unit is shown.

[0036] In the diagram: 1-1, Upper sleeve; 1-2, Sensing ring; 2-1, Lower sleeve; 2-2, Fracturing hole; 2-3a, First shoulder; 2-3b, Second shoulder; 3, Locking mechanism; 3a, Block; 3b, Compression spring; 3c, Wedge; 3d, Ball bearing; 3f, Snap ring; 3e, Elastic spring; 4-1, Inner sleeve; 4-2, Third shoulder; 4-3, Sealing ring; 4d, Double inclined surface; 4-4, Gas absorption unit; 4-4a, Ring signal receiver; 4-4b, Signal generator; 4-4c, Ignition module; 4-4d, Power supply module; 4-4e, Solid fuel; 5-1, Smart tag unit body; 5-2, Locking device. Detailed Implementation

[0037] A force-enhancing intelligent fracturing sliding sleeve system includes an intelligent fracturing sliding sleeve unit and an intelligent tag unit;

[0038] For example Figures 1 to 3 The intelligent fracturing sliding sleeve unit includes an upper sleeve 1-1, with a sensing ring 1-2 fixedly connected inside. A lower sleeve 2-1 is threadedly connected to the lower end of the upper sleeve 1-1, and a fracturing hole 2-2 is provided on the lower sleeve 2-1. The inner wall of the lower sleeve 2-1 has a first expansion section and a second expansion section arranged sequentially from top to bottom. The inner diameter of the first expansion section is larger than that of the second expansion section, forming a first shoulder 2-3a and a second shoulder 2-3b from top to bottom. A locking mechanism 3 is provided on the inner wall of the lower sleeve 2-1. An inner sleeve 4-1 is slidably connected inside the lower sleeve 2-1. The outer diameter of the inner sleeve 4-1 is reduced at the lower side, forming a stepped structure, allowing the inner sleeve 4-1 to slide and fit within the first and second expansion sections. The locking mechanism 3 is used to lock the inner sleeve 4-1, at which point the inner sleeve 4-1 blocks the fracturing hole 2-2, and the intelligent fracturing sliding sleeve unit is in the closed state. Figure 10 A third shoulder 4-2 protrudes inwardly on the inner wall of the inner sleeve 4-1. The upper sleeve 1-1, lower sleeve 2-1, and inner sleeve 4-1 have the same minimum inner diameter except at the third shoulder 4-2, forming a full bore. When the locking mechanism 3 releases the inner sleeve 4-1, the maximum downward displacement of the inner sleeve 4-1 occurs when it is simultaneously locked onto the first shoulder 2-3a and the second shoulder 2-3b, thus opening the fracturing hole 2-2, and the intelligent fracturing sliding sleeve unit is in the open state.

[0039] Among them, the fracturing holes 2-2 can be distributed in multiple rows in the longitudinal direction, and the fracturing holes 2-2 in adjacent rows are staggered. There are 12 fracturing holes 2-2 in total, with a diameter of 32mm. They are arranged in two rows, and the included angle between the axes of two adjacent fracturing holes 2-2 in the same row is 30°.

[0040] Among them, combined Figure 11 Several sealing rings 4-3 are fixed to the outer wall of the inner sleeve 4-1. When the intelligent fracturing sliding sleeve unit is in the closed state, that is, when the inner sleeve 4-1 is in the initial position, at least three sealing rings 4-3 are distributed from top to bottom on the upper side of the fracturing hole 2-2, between the locking mechanism 3 and the position before the outer diameter of the inner sleeve 4-1 is reduced, and on the lower side of the first shoulder 2-3a.

[0041] For example Figure 4 Example 1 of locking mechanism 3:

[0042] The locking mechanism 3 can be a conventional shear pin. The locking mechanism 3 is locked on the lower casing 2-1 and the inner casing 4-1. When the inner casing 4-1 is subjected to downward downhole pressure, the shear pin breaks.

[0043] For example Figure 5 and 6 Embodiments two and three of the locking mechanism 3:

[0044] For ease of description, the inner end is defined as the side facing the axis of the intelligent fracturing sleeve unit. The locking mechanism 3 includes a plug 3a, the inner end of which is fixedly connected to the outer end of a compression spring 3b, and the inner end of the compression spring 3b is fixedly connected to a locking element. The lower sleeve 2-1 has a radial channel for mounting the locking mechanism 3, allowing the plug 3a to be fixed within the lower sleeve 2-1, the compression spring 3b to extend and retract within the lower sleeve 2-1, and the locking element to move radially within the radial channel. The outer diameter of the inner sleeve 4-1 forms a locking groove, in which the locking element is locked. When the inner sleeve 4-1 is subjected to a downward force, it applies an additional outward force to the locking element. The compression spring 3b can no longer hold the locking element in the groove, and it further contracts, causing the locking element to retract into the lower sleeve 2-1, allowing the lower sleeve 2-1 to move smoothly downward.

[0045] The locking element can be a wedge 3c, with its inner end face being a tapered slope from top to bottom. Alternatively, the locking element can be a spherical ball bearing 3d, allowing the inner sleeve 4-1 to move upwards and re-lock onto the ball bearing 3d. Similarly, the locking element can be a double-sloped body 4d, with its inner end faces being radially symmetrical slopes, the upper slope having the same structure as the wedge 3c.

[0046] For example Figure 7 and 8 Embodiments four and five of the locking mechanism 3:

[0047] The locking mechanism 3 can be an elastic spring 3e or a snap ring 3f, made of a material with strong elasticity and toughness, such as a leaf spring. A special groove for the elastic spring is set on the outer wall of the inner casing 4-1. The elastic spring 3e is locked in the special groove of the elastic spring of the inner casing 4-1 by screws or other means, and is evenly arranged in a circle on the same plane, with a quantity of 6-8, to ensure that the intelligent fracturing sleeve will not be accidentally opened during cementing, well cleaning and other operations.

[0048] Whether it's the elastic spring 3e or the retaining circlip 3f, the arrangement position can be as follows: Figure 7 The same, it can also be Figure 8 The locking mechanism 3 is positioned close to the radial groove formed between the lower sleeve 2-1 and the upper sleeve 1-1, and above the sealing ring between them, facilitating installation while meeting sealing requirements. The grooves that the elastic spring 3e engages with are all annular grooves. During the initial installation of the inner sleeve 4-1, a tool is used to compress all locking mechanisms 3 towards the axis, while simultaneously pushing the inner sleeve 4-1 downwards into the lower sleeve 2-1. To facilitate the insertion of the inner sleeve 4-1, the end of the lower sleeve 2-1 can be beveled. After insertion, the locking mechanism 3 pops out away from the axis and locks itself in the radial groove, completing the installation.

[0049] When the intelligent fracturing sleeve unit is opened, the inner sleeve 4-1 is subjected to a downward force. At this time, all the elastic springs 3e are compressed towards the axis. After reaching the critical pressure, the elastic springs 3e are completely compressed into the special groove for elastic springs on the inner sleeve 4-1. The intelligent fracturing sleeve is disengaged and moves downward to open the fracturing hole 2-2.

[0050] To further explain, in combination Figure 9 and 10 The enhanced-opening intelligent fracturing sleeve system also includes an intelligent tag unit, which can employ existing technology. The intelligent tag unit should have inactive and active positions. When the target sensing ring 1-2 is activated, its outer contour changes, causing a portion of the outer periphery to move relative to the rest. Specifically, the locking device 5-2 moves relative to the intelligent tag unit body 5-1, thus locking itself within the inner casing 4-1 and preventing passage through it. When inactive, the outer contour overlaps, allowing free passage through the inner casing 4-1. Once locked, a seal is created. When the fluid pressure towards the wellhead increases, it pushes itself to open the fracturing hole 2-2 in the inner casing 4-1. The locking device 5-2 can move along an inclined plane in the direction of increasing inclined plane diameter, thus achieving expansion. The locking portion of the locking device 5-2 can be an annular structure with an opening.

[0051] For example, the intelligent fracturing completion sliding sleeve rotary expansion type smart tag mentioned in publication number CN118704934A can achieve the above functions, and its annular seal 304 can be locked on the inner casing 4-1 after expansion.

[0052] The initial shape of the intelligent tag unit body 5-1 is that of a projectile. Its outer diameter can freely pass through the upper casing 1-1, lower casing 2-1, and inner casing 4-1. In vertical wells, it can reach the designated position by its own weight. However, in horizontal wells, it needs to be pumped to move the intelligent tag unit body 5-1 to the designated position. At the same time, the detection module of the intelligent tag unit body 5-1 can automatically detect and judge the casing couplings and sensing rings 1-2 to determine whether the current position is the target intelligent tag unit body 5-1 position. Because the casing coupling wall thickness is greater than the casing wall thickness, different magnetic field induction feedback will be generated, thereby automatically determining the number of couplings passed. Among them, the casing couplings are used to connect casings of different lengths, to protect the wellbore and provide structural integrity, and every two adjacent casings are connected by casing couplings.

[0053] A method for autonomous power enhancement upon initial activation;

[0054] Step 1: Initially, the inner sleeve 4-1 is not blocked, and the upper and lower ends are in a state of pressure balance. The locking mechanism 3 is not under force. After the detection module of the intelligent tag unit body 5-1 detects the sensing ring 1-2 of the target intelligent fracturing sliding sleeve unit, the locking device 5-2 expands, thereby increasing the outer diameter of the intelligent tag unit body 5-1. The intelligent tag unit body 5-1 is also locked at the third shoulder 4-2 of the intelligent fracturing sliding sleeve unit and sealed.

[0055] Step Two: After the main body 5-1 of the intelligent tag unit is locked in place, the central channel of the inner casing 4-1 is sealed, resulting in relatively independent pressure on the upper and lower surfaces of the inner casing 4-1. Since the equivalent force-bearing area of ​​the upper surface of the inner casing 4-1 is larger than that of the lower surface, after the pressure on the upper and lower surfaces becomes equal, the force on the upper surface of the inner casing 4-1 is greater than that on the lower surface. This generates a thrust that pushes the intelligent tag unit away from the wellhead. The intelligent tag unit pushes the inner casing 4-1, and this thrust is borne by the locking mechanism 3. After the pressure is reached by the surface pump truck to the limit pressure of the locking mechanism 3, the locking mechanism 3 can no longer lock, and the inner casing 4-1 moves relative to the locking mechanism 3 in the pumping direction, thus opening the target intelligent fracturing sliding sleeve unit. Repeating the above operation completes the staged fracturing.

[0056] Among them, combined Figure 12S1 represents the cross-sectional area of ​​the top of the inner sleeve 4-1, and S2 represents the cross-sectional area of ​​the bottom of the inner sleeve 4-1. Since the outer diameter of the top of the inner sleeve 4-1 is larger than its outer diameter of the bottom, S1 > S2. S3 represents the cross-sectional area of ​​the central channel at the top of the inner sleeve 4-1, and S4 represents the cross-sectional area of ​​the central channel at the bottom of the inner sleeve 4-1. S3 and S4 are similar, satisfying S1 + S2 > S3 + S4.

[0057] After the smart tag unit locks onto the inner sleeve 4-1, the central channel of the inner sleeve 4-1 is blocked. The equivalent total force-bearing area of ​​the upper end face of the inner sleeve 4-1 is S1+S2, and the equivalent total force-bearing area of ​​the lower end face of the inner sleeve 4-1 is S3+S4. Furthermore, the formation pressure on the upper and lower end faces of the inner sleeve is basically the same. Therefore, after the smart tag locks onto the inner sleeve, the entire inner sleeve 4-1 experiences a downward force.

[0058] Preferred, combined Figure 14 and 15 It also includes a gas absorption unit 4-4 disposed in the annular cavity formed by the outer wall of the inner sleeve 4-1 and the lower sleeve 2-1; the gas absorption unit 4-4 includes an annular signal receiving device 4-4a, which is located above the annular cavity and fixed to the inner sleeve 4-1. Solid fuel 4-4e is fixed to the outer wall of the annular signal receiving device 4-4a, forming a cavity between the solid fuel 4-4e and the annular signal receiving device 4-4a for accommodating the signal generating device 4-4b, the ignition module 4-4c, and the power supply module 4-4d, which are fixed to the annular signal receiving device 4-4a. The signal generating device 4-4b and the signal generating device 4-4c form a control module. After the smart tag unit reaches the target position and locks in place, the smart tag unit sends out a signal. After receiving the instruction, the ring signal receiver 4-4a sends a signal to the signal generator 4-4b. The signal generator 4-4b issues an instruction to start the ignition module 4-4c. The ignition module 4-4c ignites the solid fuel 4-4e, which reacts with the air in the ring cavity to generate solid products, thereby reducing the pressure in the ring cavity and causing the inner sleeve 4-1 to generate a downward thrust.

Claims

1. A force-enhancing opening intelligent fracturing sliding sleeve system, comprising an intelligent fracturing sliding sleeve unit and an intelligent tag unit; The intelligent fracturing sliding sleeve unit includes an outer sleeve, a fracturing hole (2-2) set on the outer sleeve, a locking mechanism (3) fixed on the outer sleeve, a slide rail set inside the outer sleeve, and an inner sleeve (4-1) slidably connected inside the slide rail. The inner sleeve (4-1) is locked by the locking mechanism (3) and is used to block the fracturing hole (2-2). The intelligent tag unit can pass through the outer sleeve and the inner sleeve (4-1). When the intelligent tag unit expands, it can be locked and sealed inside the inner sleeve (4-1). Its features are, S1 represents the top cross-sectional area of ​​the inner sleeve (4-1), S2 represents the bottom cross-sectional area of ​​the inner sleeve (4-1), S1 > S2, S3 represents the top central channel cross-sectional area of ​​the inner sleeve (4-1), and S4 represents the bottom central channel cross-sectional area of ​​the inner sleeve (4-1), satisfying S1 + S2 > S3 + S4; after the smart tag unit locks the inner sleeve (4-1), the central channel of the inner sleeve (4-1) is blocked. At this time, the equivalent total force-bearing area of ​​the upper end face of the inner sleeve (4-1) is greater than the equivalent total force-bearing area of ​​the lower end face of the inner sleeve (4-1); The outer sleeve includes an upper sleeve (1-1) and a lower sleeve (2-1) detachably connected to the lower end of the upper sleeve (1-1). The inner wall of the lower sleeve (2-1) is provided with a first expansion section and a second expansion section from top to bottom. The inner diameter of the first expansion section is larger than that of the second expansion section to form a first shoulder (2-3a) and a second shoulder (2-3b) from top to bottom. A fracturing hole (2-2) is provided on the lower sleeve (2-1). The locking mechanism (3) is set on the inner wall of the lower sleeve (2-1), and the inner sleeve (4-1) is slidably connected inside the lower sleeve (2-1). The outer diameter of the inner sleeve (4-1) is reduced on the lower side to form a stepped structure. The inner wall of the inner sleeve (4-1) has a third shoulder (4-2) that protrudes inward. The upper sleeve (1-1), the lower sleeve (2-1) and the inner sleeve (4-1) have the same minimum inner diameter except for the third shoulder (4-2).

2. The force-enhancing opening type intelligent fracturing sliding sleeve system according to claim 1, wherein an induction ring (1-2) is provided on the outer sleeve or inner sleeve (4-1).

3. The force-enhancing opening type intelligent fracturing sliding sleeve system according to claim 1, the number of fracturing holes (2-2) is 12 in total, with a diameter of 32mm, arranged in two rows, and the included angle between the axes of two adjacent fracturing holes (2-2) in the same row is 30°.

4. The force-enhancing opening type intelligent fracturing sleeve system according to claim 1, wherein at least three sealing rings (4-3) are provided on the outer wall of the inner sleeve (4-1), and the three sealing rings (4-3) are distributed from top to bottom on the upper side of the fracturing hole (2-2), between the locking mechanism (3) and the position before the outer diameter of the inner sleeve (4-1) is reduced, and on the lower side of the first shoulder (2-3a).

5. According to claim 1, the force-enhancing intelligent fracturing sleeve system, the locking mechanism (3) is a shear pin, fixed on the outer sleeve and locked on the inner sleeve (4-1); or, the locking mechanism (3) includes a plug (3a), the inner end of the plug (3a) is fixedly connected to the outer end of a compression spring (3b), the inner end of the compression spring (3b) is fixedly connected to a locking element, and the outer sleeve is provided with a radial channel for installing the locking mechanism (3), so that the plug (3a) is fixedly connected to the inside of the outer sleeve wall, and the compression spring (3a) is fixedly connected to the outer end of the inner sleeve (4-1). 3b) It can extend and retract within the radial channel, and the locking member can also move radially within the radial channel. The locking member is locked onto the inner sleeve (4-1); or, the locking mechanism (3) is an elastic spring (3e) or a snap ring (3f). The locking mechanism (3) is fixed onto the inner sleeve (4-1). The locking mechanism (3) is locked into the radial channel formed between the lower sleeve (2-1) and the upper sleeve (1-1), or the locking mechanism (3) is locked into the radial channel on the lower sleeve (2-1); When the locking mechanism (3) includes a locking element, the locking element is a wedge (3c), a ball (3d), or a double-sloping body (4d).

6. The force-enhancing opening type intelligent fracturing sleeve system according to any one of claims 1 to 5, wherein the intelligent tag unit can detect the sensing ring (1-2), and when the sensing ring (1-2) is a target, the intelligent tag unit can expand, lock, and seal inside the inner sleeve (4-1).

7. A method for opening a force-enhancing intelligent fracturing sliding sleeve system, using the force-enhancing intelligent fracturing sliding sleeve system as described in claim 1, comprising the following steps: Step 1: Initially, there are no blockages in the central channel of the intelligent fracturing sliding sleeve unit. The upper and lower surfaces of the intelligent fracturing sliding sleeve unit are connected by the central channel, and the intelligent fracturing sliding sleeve unit is in a state of pressure balance. Step 2: After the smart tag unit is locked on the target smart fracturing sliding sleeve unit, the central channel of the target smart fracturing sliding sleeve unit is blocked, resulting in relatively independent pressure inside the target smart fracturing sliding sleeve unit and on both sides of the axis of the smart tag unit. Since the equivalent force area near the wellhead end is greater than the equivalent force area away from the wellhead end at the blockage of the central channel inside the target smart fracturing sliding sleeve unit, a downward thrust will be generated to push the smart tag unit. After the pressure is reached by the ground pump truck to the limit pressure of the locking mechanism (3), the smart fracturing sliding sleeve can be opened.

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