Full-bore expandable casing upper port releasing tool and operation method

Abstract

The invention relates to a full-bore expandable casing upper end opening releasing tool and an operation method. The expandable casing releasing tool comprises a process pipe, an expansion plugging casing, an extrusion expansion assembly and a pressing inner pipe, one end of the process pipe is provided with an upper port with internal threads, one end of the expansion plugging casing is provided with external threads, the side wall of one end of the expansion plugging casing is provided with a retreat assisting seam extending to the end of the expansion plugging casing, one end of the expansion plugging casing is screwed into the upper port, and the other end of the expansion plugging casing is screwed into the pressing inner pipe. The extrusion expansion assembly is arranged in the expansion plugging sleeve, a runner is arranged in the middle of the extrusion expansion assembly, the pressing inner pipe is arranged in the process pipe, and one end of the pressing inner pipe is connected with one end of the extrusion expansion assembly and communicated with the runner. The device has the advantages that the extruding and expanding assembly can move to extrude the expanding and leaking stoppage sleeve through pressing, the expanding and leaking stoppage sleeve is expanded and shaped, a leaking open hole is effectively plugged, a process pipe and the expanding and leaking stoppage sleeve can be easily separated after plugging, a large drift diameter is obtained in the expanding and leaking stoppage sleeve after construction is finished, and a drill bit with the original opening size can be conveniently tripped into the expanding and leaking stoppage sleeve for continuous drilling.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of oil and gas accident handling, in particular to a full-bore expandable casing upper port opening tool and operation method. BACKGROUND

[0002] The number of complex wells and deep wells in oil and gas well drilling at home and abroad is gradually increasing, and the risk of complex downhole accidents such as leakage, collapse, and high-low pressure same layer during drilling is increasing.

[0003] The current solution is mainly to use well control equipment to continue drilling under complex well conditions, or to use the method of running in the technical casing to isolate the complex layer. The above-mentioned method not only increases the drilling risk, drilling time and drilling cost, reduces the drilling speed, but also greatly increases the complexity of the well structure of the oil well, resulting in the final wellbore becoming smaller and smaller. For ultra-deep wells, it may even not be possible to drill to the target layer due to the reduction of the wellbore. The full-bore expandable casing plugging technology not only can effectively isolate the complex layer, but also can simplify the well structure, which has great significance for efficient drilling and completion of complex oil wells.

[0004] However, a neck is left at the top end of the expandable pipe after the conventional expandable pipe expansion construction is completed, and the original opening size drill bit cannot be directly run in, and a drill grinding operation is required, resulting in complicated construction procedures, increased construction time and cost.

[0005] Therefore, it is necessary to develop a full-bore expandable casing upper port opening tool and operation method to overcome the above technical problems. SUMMARY

[0006] The technical problem to be solved by the present application is to provide a full-bore expandable casing upper port opening tool and operation method, which effectively overcomes the defects of the prior art.

[0007] The technical solution of the present application to solve the above technical problems is as follows:

[0008] A full-bore expandable casing upper port opening tool, comprising a process pipe, an expansion plugging casing, an extrusion expansion assembly and a pressure hitting inner pipe, wherein one end of the process pipe is provided with an upper port with an internal thread, one end of the expansion plugging casing is provided with an external thread, and a retreat joint is formed in the side wall of one end of the expansion plugging casing and extends to the end thereof, the expansion plugging casing is screwed into the inside of the upper port, the extrusion expansion assembly is arranged in the expansion plugging casing, the extrusion expansion assembly has a flow channel penetrating through both ends thereof in the middle part, the pressure hitting inner pipe is arranged in the process pipe, one end of the pressure hitting inner pipe is connected with one end of the extrusion expansion assembly and communicates with the flow channel, and the process pipe and the expansion plugging casing are both pipe fittings that are expanded and shaped after being extruded inside.

[0009] On the basis of the above technical scheme, the application can be further improved as follows.

[0010] Further, the process pipe and the inflatable expansion sleeve are both low-carbon steel pipes that can be expanded and shaped.

[0011] Further, one end of the extrusion expansion assembly is provided with an internally threaded pipe column that is in communication with the flow channel, and one end of the pressing inner pipe is provided with an externally threaded pipe column.

[0012] Further, a plurality of the back-seaming aids are provided and are distributed along the circumference of one end of the inflatable expansion sleeve.

[0013] Further, the extrusion expansion assembly comprises an inner cone and an outer cone, one end of the inner cone is connected to one end of the pressing inner pipe, and the other end is provided with a tapered extrusion part, one end of the outer cone is provided with a plurality of deformable extrusion expansion petals in the circumferential direction, the interiors of the plurality of extrusion expansion petals form a tapered cavity that is adapted to the extrusion part, the plurality of extrusion expansion petals are arranged around the extrusion part, the inner cone and the outer cone are both provided with the flow channel that penetrates both, and one end of the inner cone is provided with a sealing member that is in contact with and seals the inner wall of the inflatable expansion sleeve.

[0014] Further, the inner cone is a cylindrical seat body, and the flow channel penetrates the middle part of the cylindrical seat body, and the outer cone is a cylindrical seat body, and the flow channel penetrates the middle part of the cylindrical seat body.

[0015] Further, the sealing member is a flexible and annular member.

[0016] Further, the sealing member is a rubber skin bowl.

[0017] Further, the inner diameter of the upper port is greater than the inner diameter of the process pipe body, the connection between the process pipe body and the inner wall of the upper port is provided with a trumpet-shaped variable diameter surface, the outer diameter of the sealing member is greater than the inner diameter of the process pipe body, and the shape is provided as a trumpet shape that is adapted to the variable diameter surface.

[0018] The beneficial effects are: the structure design is simple and reasonable, the extrusion expansion assembly can be moved to extrude the inflatable expansion sleeve by pressing, the inflatable expansion sleeve is expanded and shaped, the lost circulation open hole is effectively plugged, the process pipe and the inflatable expansion sleeve can be easily separated after plugging, the overall construction is relatively safe, the construction operation efficiency is high, the drilling and grinding processes are eliminated, a larger drift diameter is obtained in the inflatable expansion sleeve immediately after the construction is completed, and the original opening size drill bit can be directly lowered and continuously drilled.

[0019] A method for operating a full-drift-diameter inflatable sleeve upper port releasing tool is also provided, which comprises the following steps:

[0020] Step 1: connect the entire tool;

[0021] Step two, the whole tool is lowered into the well to a predetermined position by using the process pipe;

[0022] Step three, the liquid is injected by using the inner pipe to pressurize, during the pressurizing process, the pressure acts on the lower end surface of the outer cone, so that the outer cone moves upward, the plurality of extrusion expansion petals are extruded outward by the extrusion part, the complete cone is inflated, and the inflatable packer is in contact with the inflated part;

[0023] Step four, continue to increase the pressure, the extrusion inflation assembly moves upward as a whole, during the movement, the inflatable packer expands along the way until the extrusion inflation assembly moves away from one end of the inflatable packer, and the inflatable packer expands tightly against the well wall;

[0024] Step five, continue to pressurize, while continuing to pressurize, the process pipe is pulled out of the wellbore, at the same time, the process pipe and the inflatable packer are separated from each other under the action of the retreat joint.

[0025] The beneficial effect is that the operation method is relatively simple, safe and efficient. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a structural schematic view of the tool for the upper port of the full-bore inflatable casing of the present application, in which the inflatable packer starts to locally expand when the tool is used;

[0027] Figure 2 It is a structural sectional view of the tool for the upper port of the full-bore inflatable casing of the present application;

[0028] Figure 3 It is a structural schematic view of one end of the process pipe in the tool for the upper port of the full-bore inflatable casing of the present application;

[0029] Figure 4 It is a structural schematic view of the inflatable packer before expansion in the tool for the upper port of the full-bore inflatable casing of the present application;

[0030] Figure 5 It is an operation flow chart of the tool for the upper port of the full-bore inflatable casing of the present application.

[0031] In the drawings, the components represented by each reference numeral are listed as follows:

[0032] 1, process pipe; 2, inflatable packer; 3, extrusion inflation assembly; 4, pressurizing inner pipe; 21, retreat joint; 31, inner cone; 32, outer cone; 33, sealing member; 311, extrusion part; 321, extrusion expansion petal. DETAILED DESCRIPTION

[0033] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0034] Example 1

[0035] like Figures 1 to 4 As shown, the full-bore expandable sleeve upper port release tool of this embodiment includes a process tube 1, an expansion and sealing sleeve 2, a compression expansion component 3, and a pressure inner tube 4. The process tube 1 has an upper port with internal threads at one end, the expansion and sealing sleeve 2 has an external thread at one end, and the side wall of the expansion and sealing sleeve 2 has a release slit 21 extending to its end. One end of the expansion and sealing sleeve 2 is screwed into the upper port. The compression expansion component 3 is disposed in the expansion and sealing sleeve 2. The compression expansion component 3 has a flow channel penetrating both ends in the middle. The pressure inner tube 4 is placed in the process tube 1, one end of which is connected to one end of the compression expansion component 3 and communicates with the flow channel. Both the process tube 1 and the expansion and sealing sleeve 2 are tubular components that expand and are shaped after being internally compressed.

[0036] The working principle of the tool for releasing the upper end of the full-bore expandable sleeve in this embodiment is as follows:

[0037] During construction, the process pipe 1 is lowered into the well to a predetermined position along with the expansion plugging casing 2 and the extrusion expansion assembly 3. Then, the extrusion expansion assembly 3 is pressurized to achieve complete expansion. As the pressure continues to increase, the extrusion expansion assembly 3 moves upward, expanding the expansion plugging casing 2. When it reaches the threaded section at the connection between the process pipe 1 and the expansion plugging casing 2, the extrusion expansion assembly 3 passes through the external thread of the expansion plugging casing 2 and the internal thread of the upper end of the process pipe 1 in sequence, fully expanding the threaded section of both. As the extrusion expansion assembly 3 continues to be lifted, due to the design of the pull-out joint 21, the process pipe 1 can easily detach from the threaded connection of the expansion plugging casing 2 and be taken out of the wellbore. Because the expansion plugging casing 2 expands and is shaped, and seals the leaking open hole, and because the wall thickness of the expansion plugging casing 2 is sufficient, it will not form a necking in the well, allowing for easy subsequent lowering of the original drill bit for continued drilling.

[0038] In this embodiment, both the process pipe 1 and the expansion plugging sleeve 2 are expandable and shapeable low-carbon steel pipes. Both have good toughness and strength, and are capable of expanding under pressure and shaping after expansion, facilitating the above-mentioned construction operations.

[0039] In this embodiment, a sealing ring (represented by a in the figure) is also provided at the threaded connection between the process pipe 1 and the expansion plugging sleeve 2.

[0040] As a preferred embodiment, one end of the extrusion expansion assembly 3 is provided with a threaded pipe column through which the flow channel penetrates, and one end of the pressing inner pipe 4 is provided with an external thread, and the one end of the pressing inner pipe 4 is screwed into the threaded pipe column.

[0041] In the above embodiment, the threaded pipe column is integrally formed at one end of the extrusion expansion assembly 3, and the external thread is provided at one end of the pressing inner pipe 4. When the two are connected, the one end of the pressing inner pipe 4 is inserted into the threaded pipe column at one end of the extrusion expansion assembly 3, and the two are screwed together to maintain a stable connection between the two. The operation is relatively simple, and it is also easy to disassemble after use. During the pressing process, the connection between the two can also maintain good sealing and ensure that the pressing liquid can flow smoothly.

[0042] As a preferred embodiment, the back-off seam 21 is provided in multiple and is spaced along the circumferential direction of one end of the expansion plug 2.

[0043] In the above embodiment, the back-off seam 21 is in a spaced distribution structure in the circumferential direction, which can ensure that when the expansion plug 2 is expanded and shaped and the extrusion expansion assembly 3 is continuously lifted, the expansion plug 2 can be effectively separated from the upper end port of the process pipe 1. Specifically, the back-off seam 21 is a slit along the axial direction of one end of the expansion plug 2. After the expansion plug 2 is expanded and shaped (that is, after the extrusion expansion assembly 3 moves away from one end of the expansion plug 2), a certain force is applied to lift the process pipe 1. During the lifting process, the back-off seam 21 is stressed to reduce (that is, one end of the expansion plug 2 is shrunk under the extrusion pressure), which can effectively separate the expansion plug 2 from the upper end port of the process pipe 1.

[0044] Optimally, the back-off seam 21 is provided with three, that is, three arc-shaped outer surfaces between the three back-off seams 21 are provided with external threads of the sheet-shaped pipe port (the sheet-shaped pipe port is one end of the expansion plug 2).

[0045] As a preferred embodiment, the extrusion expansion assembly 3 includes an inner cone 31 and an outer cone 32. One end of the inner cone 31 is connected to one end of the pressing inner pipe 4, and the other end is provided with a tapered extrusion portion 311. One end of the outer cone 32 is provided with a plurality of deformable extrusion expansion petals 321 in the circumferential direction. The interiors of the plurality of extrusion expansion petals 321 form a tapered cavity adapted to the extrusion portion 311. The plurality of extrusion expansion petals 321 are arranged around the extrusion portion 311. The inner cone 31 and the outer cone 32 are provided with the flow channel penetrating both of them. One end of the inner cone 31 is provided with a sealing member 33 in contact with the inner wall of the expansion plug 2 for sealing.

[0046] In the structure, the seal 33 blocks the annular space between the inner cone 31 and the process pipe 1. When the pressurizing liquid is injected through the pressurizing inner pipe 4, the pressurizing liquid passes through the pressurizing inner pipe 4 and the flow channel in sequence and reaches the lower part of the extrusion and expansion assembly 3. During the continuous pressurizing process, a "dead space" is formed below the extrusion and expansion assembly 3. The pressure of the pressurizing liquid acts on the lower end of the extrusion and expansion assembly 3 (i.e. the lower end of the outer cone 32), thereby driving the outer cone 32 to move upward. During the movement, the extrusion and expansion petals 321 of the outer cone 32 wrap around the extrusion part 311 of the inner cone 31. Since the extrusion part 311 is conical, the extrusion and expansion petals 321 are extruded outward and expanded. The extrusion and expansion petals 321 extrude and expand the leak-proof casing 2 radially outward, so that the leak-proof casing 2 is expanded and tightly pressed against the well wall at the corresponding lost circulation open hole. With the continuous pressurizing, the extrusion and expansion assembly 3 continuously moves upward until it is separated from one end of the leak-proof casing 2 (during the process, the extrusion and expansion assembly 3 moves and extrudes the leak-proof casing 2 along the way). The leak-proof casing 2 is completely expanded and shaped, and tightly blocks the lost circulation open hole well wall. Finally, since the outer threaded section of one end of the leak-proof casing 2 and the inner threaded section of the upper port of one end of the process pipe 1 are both expanded and shaped under pressure, lifting the process pipe 1 can make the upper port separate from the leak-proof casing 2, which can be removed. The design is simple and reasonable. The pressure of the pressurizing liquid is used to drive the extrusion and expansion assembly 3 to move, complete the expansion and shaping, and the design is very clever, and the operation is simple and fast.

[0047] It should be particularly pointed out that in the embodiment, the cross section of the extrusion and expansion petals 321 is circular arc, and the outer diameter of the cross section gradually decreases from the middle to the two ends, forming a variable-diameter extrusion and expansion petal 321.

[0048] Preferably, in the embodiment, the extrusion and expansion petals 321 at one end of the extrusion and expansion assembly 3 are provided with three.

[0049] As a preferred embodiment, the inner cone 31 is a cylindrical seat with a flow channel passing through the middle, and the outer cone 32 is also a cylindrical seat with a flow channel passing through the middle.

[0050] In the above embodiment, the shapes of the inner cone 31 and the outer cone 32 are designed to match the leak-proof casing 2, and the outer diameters of the two are close to but smaller than the inner diameter of the leak-proof casing 2.

[0051] As a preferred embodiment, the seal 33 is a flexible and annular member.

[0052] In the above embodiment, the design of the seal 33 can effectively block the gap-shaped annular space between the inner cone 31 and the inner wall of the process pipe 1, ensure that the pressurizing liquid passes through the annular space, and achieve effective pressurizing.

[0053] In this embodiment, the sealing member 33 is a conventional rubber cup.

[0054] It should be noted that: the sealing member 33 is generally sleeved on the outer threaded pipe column at one end of the extrusion expansion assembly 3, and at the time of installation, the inner cone 31 is connected and matched with the process pipe 1, the outer cone 32 is in the expansion plug sleeve 2, and is temporarily connected with the inner cone 31, and moves with the pressure.

[0055] As a preferred embodiment, the inner diameter of the upper port is larger than the inner diameter of the main body of the process pipe 1 (except the upper port), the inner wall of the main body of the process pipe 1 and the upper port is provided with a trumpet-shaped variable diameter surface (indicated by B in the figure), the outer diameter of the sealing member 33 is larger than the inner diameter of the main body of the process pipe 1, and the shape is trumpet-shaped which is matched with the variable diameter surface.

[0056] In the above embodiment, before being lowered into the well, the sealing member 33 is sleeved at the variable diameter surface, and is limited by the variable diameter surface to avoid moving towards the other end of the process pipe 1, and at the same time, the plurality of extrusion expansion petals 321 of the outer cone 32 are wrapped outside the extrusion part 311 of the inner cone 31 and are slightly extruded and expanded, and are kept between the extrusion part 311 and the inner wall of the expansion plug sleeve 2. After the pressure is started, the lower end of the outer cone 32 is under the pressure of the larger pressure liquid, so that it moves upward.

[0057] Embodiment 2

[0058] As shown in the figure, the operation method of the full-bore expandable sleeve upper port tool of this embodiment includes the following steps: Figure 5 Step one, connect the whole tool;

[0059] Step two, use the process pipe 1 to lower the whole tool into the well to the predetermined position;

[0060] Step three, inject liquid pressure by using the pressure inner pipe 4, and during the pressure process, the pressure acts on the lower end surface of the outer cone 32, so that the outer cone 32 moves upward, the plurality of extrusion expansion petals 321 are extruded and expanded outside by the extrusion part 311, the complete cone is expanded, and the expansion plug sleeve 2 is expanded at the position contacted with it;

[0061] Step four, continue to increase the pressure, and the extrusion expansion assembly 3 moves upward as a whole, and during the movement, the expansion plug sleeve 2 is expanded along the way until the extrusion expansion assembly 3 moves away from one end of the expansion plug sleeve 2, and the expansion plug sleeve 2 is expanded to tightly adhere to the well wall;

[0062]

[0063] ​Step five, continue to press, while continuing to press, up to squeeze the expansion assembly 3, the process pipe 1 out of the wellbore, while the process pipe 1 and the expansion packer 2 are separated from the help of the retreat seam 21 under the action of separation.

[0064] The operation method is simple and fast, the two port threads at the connection between the expansion packer and the process pipe are reliably separated, and the construction is safe; the construction operation efficiency is high, the drilling and grinding process is omitted, and the operation time is greatly saved. After the construction is completed, a larger drift diameter is obtained in the expansion packer, and a drill bit of the original opening size can be directly lowered to continue drilling.

[0065] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0066] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0067] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0068] In the present application, unless otherwise explicitly specified and limited, a first feature is "on" or "under" a second feature can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature is "over", "above" and "on top of" the second feature can mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. The first feature is "under", "below" and "underneath" the second feature can mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.

[0069] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0070] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A full-gauge inflatable casing up-port junked tool, characterized by: The utility model provides a kind of full bore expandable casing upper port tool, including process pipe (1), expansion patching casing (2), extrusion expansion assembly (3) and press inner tube (4), one end of the process pipe (1) is equipped with upper port with internal thread, one end of the expansion patching casing (2) is equipped with external thread, and the expansion patching casing (2) one end side wall is equipped with the help of retired seam (21) extending to its end, the expansion patching casing (2) one end is screwed in the inside of the upper port, the extrusion expansion assembly (3) is arranged in the expansion patching casing (2), the extrusion expansion assembly (3) middle part has flow channel passing through both ends thereof, the press inner tube (4) is placed in the process pipe (1), one end thereof is connected with one end of the extrusion expansion assembly (3), and is communicated with the flow channel, the process pipe (1) and expansion patching casing (2) are all internally extruded and then expanded and shaped pipe fittings.

2. A through-the-wire inflatable sleeve port unstuffing tool according to claim 1, wherein: The process pipe (1) and the expansion patching casing (2) are both expandable and shapeable low-carbon steel pipes.

3. A through-the-wash pipe inflatable sleeve ported drop tool according to claim 1, wherein: One end of the extrusion expansion assembly (3) is provided with an internally threaded pipe column that is communicated with the flow channel, and one end of the press inner tube (4) is provided with an external thread.

4. A through-the-wire inflatable sleeve port unblocking tool as defined in claim 1, wherein: The help of retired seam (21) is provided with multiple and is distributed along the circumferential direction of one end of the expansion patching casing (2).

5. A full gauge expandable liner ported-out tool according to any of claims 1 to 4, characterized in that: The extrusion expansion assembly (3) includes an inner cone (31) and an outer cone (32), one end of the inner cone (31) is connected with one end of the press inner tube (4), and the other end is provided with a tapered extrusion part (311), one end of the outer cone (32) is provided with multiple deformable extrusion expansion petals (321) in the circumferential direction, the interiors of the multiple extrusion expansion petals (321) form a tapered cavity that is adapted to the extrusion part (311), and the multiple extrusion expansion petals (321) are arranged outside the extrusion part (311), the inner cone (31) and the outer cone (32) are both provided with the flow channel that penetrates both of them, and one end of the inner cone (31) is provided with a sealing member (33) that is in contact with and seals the inner wall of the expansion patching casing (2).

6. A through-the-wire inflatable sleeve port unblocking tool as defined in claim 5, wherein: The inner cone (31) is a cylindrical seat body, and the flow channel penetrates the middle part thereof, and the outer cone (32) is also a cylindrical seat body, and the flow channel penetrates the middle part thereof.

7. A through-the-wire inflatable sleeve port unblocking tool as defined in claim 5, wherein: The sealing member (33) is a flexible and annular member.

8. A through-the-wire inflatable sleeve port unblocking tool as defined in claim 7, wherein: The sealing member (33) is a rubber skin bowl.

9. A through-the-wire inflatable sleeve port unblocking tool as defined in claim 7, wherein: The inner diameter of the upper port is greater than the inner diameter of the main body of the process pipe (1), the inner wall of the interface end is provided with internal threads and is screwed with one end of the expansion patching casing (2), the connection between the main body of the process pipe (1) and the inner wall of the upper port is provided with a trumpet-shaped variable-diameter surface, the outer diameter of the sealing member (33) is greater than the inner diameter of the main body of the process pipe (1), and the shape is provided as a trumpet shape that is adapted to the variable-diameter surface.

10. An operating method of the full bore expandable casing upper port tool according to any one of claims 5 to 9, comprising the following steps: Step one, connecting the entire tool; Step two, using the process pipe (1) to lower the entire tool into the well to a predetermined position; Step three, use the inner tube (4) to inject liquid pressure, during the process of pressure, the pressure acting on the lower end surface of the outer cone (32), so that the outer cone (32) moves up, a plurality of said extrusion expansion petals (321) are extruded by the extrusion part (311), and the complete inflation cone is expanded, and the part of the inflation packer (2) in contact with it is expanded; Step four, continue to increase the pressure, the extrusion inflation assembly (3) moves up as a whole, during the movement, the inflation packer (2) is expanded along the way, until the extrusion inflation assembly (3) moves away from one end of the inflation packer (2), and the inflation packer (2) is expanded to adhere to the well wall; Step five, continue to press, while continuing to press, pull up the process pipe (1), take the process pipe (1) out of the wellbore, at the same time, the process pipe (1) and the inflation packer (2) are separated from each other under the action of the help retreat joint (21).

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