Flexible electric delivery type through-tubing soluble expansion sealing device and construction process method

Abstract

The present invention relates to a flexible electric delivery type through-tubing soluble swelling sealing device, comprising a signal transmission and positioning part, a pumping and pressing part, an upper straightening part, at least one rubber cartridge sealing part, and a lower straightening part connected in sequence; the pumping and pressing part comprises a filter short section and a linear motor plunger pump; the upper straightening part comprises a hand-release upper joint, a second connecting short section, and a first straightening module connected in sequence, the connection angle between the second connecting short section and the first straightening module is adjustable, and an elastic check valve is installed at the other end of the first straightening module; the rubber cartridge sealing part comprises at least two swelling rubber cartridge sealing modules, the swelling rubber cartridge sealing modules are rotatably connected by a third connecting short section, and the connection angle between adjacent swelling rubber cartridge sealing modules is adjustable; the present invention overcomes the technical difficulties that conventional through-tubing plugging operation tools are difficult to effectively center and the tools have poor passability in curved well sections due to factors such as the excessive length of the overall rigid part of the tool and the lack of flexible connection.

Description

Technical Field

[0001] The invention belongs to the technical field of oil and gas field development, and in particular relates to a flexible electric delivery type through-oil-pipe soluble expansion isolation device and a construction process method. Background Art

[0002] When operating gas injection wells and gas production wells in oil and gas reservoirs or gas storage facilities, it is often necessary to perform well killing construction. However, most of these wells have problems such as formation leakage and formation blockage caused by killing fluid contaminating the formation. Especially when there is a production string in the wellbore, there is pressure and leakage, if conventional methods are used to kill the well, it will bring considerable work difficulties or even make construction impossible. At present, the solutions known at home and abroad mainly use chemical plugging or physical particle plugging. Whether it is chemical plugging or physical plugging, there are disadvantages such as "poor stability and difficulty in restoring formation permeability", and cannot simultaneously meet the technical requirements of "no damage to the formation, pressure operation, and passing through the production string". As far as the currently known mechanical plugging technology is concerned, longer bridge plugs are usually used to meet the needs of larger expansion ratio operations. For example, the total length of a cable-set expandable through-tubing bridge plug (including the bridge plug and the setting tool) is often 6-9 meters. For this type of bridge plug, due to the excessive length of its rigid part, it is difficult to ensure the passability of the tool in harsh well sections with large doglegs such as highly deviated wells and horizontal wells, and technical difficulties often arise in which the tool is difficult to lower. At the same time, since the above-mentioned high expansion ratio bridge plug cannot be degraded, the problem of difficulty in removing the bridge plug after operation also occurs from time to time.

[0003] In view of the above problems, it is necessary to study a flexible electric delivery type through-tubing soluble expansion sealing device and construction process method that is suitable for through-tubing and deformed tubing expansion sealing operations in highly deviated wells and horizontal wells, suitable for through-tubing and deformed tubing expansion sealing operations in low-pressure leakage wells, and has the technical characteristics of strong adaptability to wellbore shape, high construction efficiency, safe release, overall controllable degradation, and easy operation. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and to provide a flexible electric delivery type through-tubing soluble expansion sealing device and construction process method suitable for through-tubing and deformed tubing expansion sealing operations in highly deviated wells and horizontal wells, suitable for through-tubing and deformed tubing expansion sealing operations in low-pressure leakage wells, with the technical characteristics of strong adaptability to wellbore shapes, high construction efficiency, safe release, overall controllable degradation, and easy operation.

[0005] The present invention solves the technical problem by adopting the following technical solutions:

[0006] A flexible electric delivery type through-tubing soluble expansion packing device, comprising a signal transmission and positioning part, a pumping and pressure-pressing part, an upper straightening part, at least one rubber cartridge setting part, and a lower straightening part connected in sequence;

[0007] The pumping and pressing part includes a filter nipple and a linear motor plunger pump, the filter nipple and the linear motor plunger pump are connected through a first connecting nipple, a plurality of liquid inlet holes are arranged on the side wall of the filter nipple, and a filter gasket is radially installed on the first connecting nipple;

[0008] The upper righting part comprises a release upper joint, a second connecting short section, and a first righting module, the linear motor plunger pump is fixedly connected to the release upper joint, the other end of the release upper joint is connected to the second connecting short section through a shear pin, the other end of the second connecting short section is rotatably connected to the first righting module, and the connection angle between the second connecting short section and the first righting module is adjustable, and an elastic check valve is installed at the other end of the first righting module;

[0009] The rubber cylinder setting portion comprises at least two expansion rubber cylinder setting modules, the expansion rubber cylinder setting modules are rotatably connected via a third connecting short section, and the connection angle between adjacent expansion rubber cylinder setting modules is adjustable;

[0010] The sealing device is lowered into the well section to be sealed, and the fluid in the wellbore enters the sealing device through the liquid inlet hole. The linear motor plunger pump works to make the fluid enter the rubber cartridge sealing part through the upper righting part, and causes the expansion rubber cartridge sealing module to expand and deform laterally to achieve sealing. After sealing, the expansion rubber cartridge sealing module can no longer take in liquid, so the elastic check valve is closed, and the linear motor plunger pump continues to work to cut the shear pin, thereby achieving the release of the upper righting part, the rubber cartridge sealing part and the lower righting part.

[0011] Furthermore, the upper righting part, the rubber cylinder setting part and the lower righting part are made of degradable materials.

[0012] Furthermore, the linear motor plunger pump includes a plunger body and a plunger pump outer shell, a through cavity is axially provided in the plunger body, a plunger body piston is fixedly provided on the outer wall at one end thereof, and at least one plunger check valve is radially provided in the cavity at the other end, a linear motor mover is fixedly installed on the outer wall of the plunger body, and a motor stator is fixedly installed on the inner wall of the plunger pump outer shell, a cylinder body sealing ring is also installed between the plunger body and the plunger pump outer shell, so that the linear motor mover and the motor stator between the cylinder body sealing ring and the plunger body piston are in a sealed state; the plunger body drives the plunger body piston to reciprocate with the linear motor mover, thereby realizing the suction and pumping out of the liquid.

[0013] Furthermore, the signal transmission and positioning part includes a positioning module and a weight rod, the positioning module is fixedly connected to one end of the weight rod, and the other end of the weight rod is fixedly connected to the filter nipple.

[0014] Furthermore, the lower righting portion includes a second righting module, and a terminal end of the second righting module is fixedly connected to the guide cone.

[0015] Furthermore, the first righting module or the second righting module comprises a righting part body, which is an axially through-tubular structure, and a plurality of indented righting part body grooves are arranged on its outer wall, a righting part support block is installed in the righting part body groove in a limited position, a righting part leaf spring is installed between the righting part support block and the righting part body groove, and a roller is installed on the outer wall of the righting part support block.

[0016] Furthermore, the elastic check valve includes a conical plug, a rubber spring, and a metal gasket screen; the conical plug is connected to the metal gasket screen through the rubber spring, and the metal gasket screen is provided with a flow hole. When the conical plug compresses the rubber spring under fluid pressure, the elastic check valve can be opened; when the expansion rubber cartridge sealing module is sealed and the fluid pressure inside and outside the elastic check valve reaches a balance, the conical plug blocks the first righting module at this time, so that the fluid no longer flows through the elastic check valve to the rubber cartridge sealing part.

[0017] Furthermore, the expansion rubber cylinder sealing module includes a central tube of the expansion rubber cylinder, an inner capsule of the expansion rubber cylinder, and an outer layer of the expansion rubber cylinder. The central tube of the expansion rubber cylinder is provided with a liquid outlet. The outer layer of the expansion rubber cylinder includes a rubber cylinder frame and an outer layer rubber cylinder. The rubber cylinder frame includes a plurality of support plates. The support plates are dispersed on the inner wall of the outer layer rubber cylinder, and both ends thereof are fixedly connected to both ends of the outer layer rubber cylinder; the inner capsule of the expansion rubber cylinder is sleeved on the central tube of the expansion rubber cylinder, and one end thereof is fixedly connected to one end of the central tube of the expansion rubber cylinder, and the other end can move in an axial sealing manner along the central tube of the expansion rubber cylinder; the outer layer of the expansion rubber cylinder is sleeved on the outside of the inner capsule of the expansion rubber cylinder, and one end thereof is fixedly connected to one end of the central tube of the expansion rubber cylinder, and the other end can move in an axial sealing manner along the central tube of the expansion rubber cylinder.

[0018] Furthermore, both ends of the third connecting short section expand circumferentially to form a convex arc surface structure, an arc-shaped hole matching the arc surface structure is formed in the expansion rubber cartridge sealing module, and a chamfer is formed at the outer edge of the connection between the expansion rubber cartridge sealing module and the third connecting short section.

[0019] The construction process method based on the flexible electric delivery type through-tubing soluble expansion packer comprises the following steps:

[0020] The isolation device is lowered into the well, and the rubber cylinder sealing part is positioned to the well section to be blocked by the positioning module;

[0021] The linear motor plunger pump works, and the fluid in the wellbore enters the inner cavity of the filter nipple through the filter nipple. With the multiple reciprocating motions of the linear motor plunger pump, the fluid in the wellbore that enters through the filter nipple presses open the tapered plug of the elastic check valve, and is continuously squeezed into the inner cavity of the central tube of the expansion rubber tube of the rubber tube sealing part, causing the inner capsule and the outer layer of the expansion rubber tube to expand and deform laterally;

[0022] When the pumped fluid expands the expansion rubber cartridge sealing module and reaches the sealing state, the elastic check valve is closed because the expansion rubber cartridge sealing module cannot continue to expand and the internal and external fluid pressures reach equilibrium; the linear motor plunger pump continues to work, and the pumped fluid pressure gradually increases. When the pressure increases to the point where the shear pin is sheared off, the upper righting part, the rubber cartridge sealing part, and the lower righting part are released, and the wellbore below the device after the release can be closed;

[0023] When the underground construction is completed, degradable liquid is injected through the well pipe to dissolve the equipment in the well and complete the construction.

[0024] The advantages and positive effects of the present invention are:

[0025] The present invention is suitable for expansion and plugging operations of through-tubing and deformed tubing strings in highly deviated wells and horizontal wells, and is suitable for expansion and plugging operations of through-tubing and deformed tubing strings in low-pressure leakage wells. It has the technical characteristics of strong adaptability to wellbore shapes, high construction efficiency, safe release, overall controllable degradation, simple operation, and the like, and will not cause any blockage in the wellbore after the operation; its straightening part and flexible connection structure enhance the adaptability of the entire device in curved wellbores, effectively reduce the influence of the bending deformation of the wellbore on the passability of the tool and the expansion and sealing of the rubber cylinder, and overcome the technical difficulties that the conventional through-tubing plugging operation tools are difficult to effectively center, and the tools have poor passability in curved well sections and insufficient adaptability in non-straight well sections due to factors such as the excessive length of the overall rigid part of the tool and the lack of flexible connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but it should be understood that these drawings are designed only for explanation purposes and are not intended to limit the scope of the present invention. In addition, unless otherwise specified, these drawings are intended only to conceptually illustrate the structural configurations described herein and are not necessarily drawn to scale.

[0027] Figure 1 A structural cross-sectional view of the upper half of a flexible electric delivery through-tubing soluble swelling packer provided in an embodiment of the present invention;

[0028] Figure 2 A structural cross-sectional view of the lower half of a flexible electric delivery through-tubing soluble swelling packing device provided in an embodiment of the present invention;

[0029] Figure 3 A schematic diagram of the structure of the signal transmission and positioning part of the flexible electric delivery through-tubing soluble swelling packing device provided by an embodiment of the present invention;

[0030] Figure 4 A structural cross-sectional view of the pumping and squeezing portion of the flexible electric delivery through-tubing soluble swelling packing device provided in an embodiment of the present invention;

[0031] Figure 5 for Figure 4 A magnified view of the structure at center;

[0032] Figure 6 A structural cross-sectional view of the upper righting portion of the flexible electric delivery through-tubing soluble swelling packing device provided in an embodiment of the present invention;

[0033] Figure 7 for Figure 6 A magnified view of the structure at B in the middle;

[0034] Figure 8 A structural cross-sectional view of a first expansion rubber cartridge setting module of a flexible electric delivery through-tubing soluble expansion packing device provided in an embodiment of the present invention;

[0035] Fig. 9 A structural cross-sectional view of a second expansion rubber cartridge setting module of a flexible electric delivery through-tubing soluble expansion packing device provided in an embodiment of the present invention;

[0036] Fig.10 A structural cross-sectional view of the lower righting portion of the flexible electric delivery through-tubing soluble swelling packing device provided in an embodiment of the present invention; DETAILED DESCRIPTION

[0037] First, it should be noted that the specific structure, features and advantages of the present invention will be specifically described below by way of example, but all descriptions are only for illustration and should not be understood as limiting the present invention in any way. In addition, any single technical feature described or implied in the embodiments mentioned herein can still be combined or deleted between these technical features (or their equivalents) to obtain more other embodiments of the present invention that may not be directly mentioned herein.

[0038] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0039] like Figure 1-10 As shown, the present invention provides a flexible electric delivery type through-tubing soluble expansion isolation device, comprising a signal transmission and positioning part I, a pumping and pressure-pressing part II, an upper straightening part III, at least one rubber cartridge setting part IV, and a lower straightening part V connected in sequence;

[0040] The pumping and pressing part II includes a filter nipple and a linear motor plunger pump, the filter nipple and the linear motor plunger pump are connected via a first connecting nipple, a plurality of liquid inlet holes 401 are provided on the side wall of the filter nipple, and a filter gasket is radially installed on the first connecting nipple;

[0041] The upper righting part III comprises a hand-release upper joint 7, a second connecting short section 8, and a first righting module. The linear motor plunger pump is fixedly connected to the hand-release upper joint 7. The other end of the hand-release upper joint 7 is connected to the second connecting short section 8 through a shear pin 701. The other end of the second connecting short section 8 is rotatably connected to the first righting module, and the connection angle between the second connecting short section 8 and the first righting module is adjustable. An elastic check valve 1108 is installed at the other end of the first righting module.

[0042] The rubber cylinder setting part IV comprises at least two expansion rubber cylinder setting modules, the expansion rubber cylinder setting modules are rotatably connected by a third connecting short section 18, and the connection angle between adjacent expansion rubber cylinder setting modules is adjustable;

[0043] The sealing device is lowered into the well section to be sealed, and the fluid in the wellbore enters the sealing device through the liquid inlet hole. The linear motor plunger pump works to make the fluid enter the rubber cartridge sealing part through the upper righting part, and causes the expansion rubber cartridge sealing module to expand and deform laterally to achieve sealing. The linear motor plunger pump continues to work to close the elastic check valve, and the shear pin is cut off to achieve the release of the upper righting part III, the rubber cartridge sealing part IV and the lower righting part V.

[0044] The upper straightening part III, the rubber cylinder sealing part IV and the lower straightening part V are made of degradable materials.

[0045] The linear motor plunger pump comprises a plunger body and a plunger pump outer shell, wherein a through cavity is axially arranged in the plunger body, a plunger body piston 612 is fixedly arranged on the outer wall at one end thereof, and at least one plunger check valve 602 is radially arranged in the cavity at the other end thereof, a linear motor mover 611 is fixedly installed on the inner wall of the plunger body, and a motor stator 610 is fixedly installed on the inner wall of the plunger pump outer shell, and a cylinder body sealing ring 607 is also installed between the plunger body and the plunger pump outer shell, so that the linear motor mover 611 and the motor stator 610 between the cylinder body sealing ring 607 and the plunger body piston 612 are in a sealed state; the plunger body drives the plunger body piston 612 to reciprocate with the linear motor mover 611, thereby realizing the suction and pumping out of the liquid; specifically In this embodiment, the filter short section 4 is a cylindrical structure with a hollow inner cavity, one end of which is processed with a female buckle for connecting to the weighting rod 3, and the other end is processed with a male buckle for connecting to the first connecting short section 5; one end of the first connecting short section 5 is processed with a female buckle for connecting to the filter short section 4, and the other end is processed with a male buckle for connecting to the upper shell 604 of the linear motor plunger pump, wherein the first connecting short section 5 is machined with a step 502 for placing a filter gasket 501, and the filter gasket 501 is connected to the first connecting short section 5 by a thread, which is mainly used to filter the fluid sucked in through the liquid inlet hole 401 to prevent impurities such as mud and sand from clogging the inner cavity of the linear motor plunger pump; the plunger body includes a single-flow valve sleeve 603 on the plunger and a plunger cavity 609 The check valve sleeve 603 on the plunger is a rod-shaped structure that is thick at the top and thin at the bottom. It is connected to the two groups of plunger check valves 602 installed in its own inner cavity through the threads in the inner cavity. The lower end is processed with a male buckle for connecting to the linear motor plunger coupling 605. The check valve sleeve 603 on the plunger is connected to the plunger cavity 609 through the linear motor plunger coupling 605; the plunger pump outer shell includes an upper shell 604 of the linear motor plunger pump and a lower shell 608 of the linear motor plunger pump. The check valve 601 on the plunger pump is also installed at the upper end of the linear motor plunger pump 6, which is connected to the first connecting short section 5 through a special thread, and is mainly used to allow the liquid filtered by the filter gasket 501 to enter the lower plunger pump cavity in one direction. The plunger check valve 602 is located on the single flow In the inner cavity of the valve sleeve, a double-channel check valve group structure is adopted, which is mainly used to allow the liquid flowing in through the check valve 601 on the plunger pump to enter the inner cavity of the expansion rubber cylinder below through the linear motor plunger pump 6 in one direction; the upper shell 604 of the linear motor plunger pump is a tubular structure with a hollow inner cavity, and its two ends are respectively processed with male buckles for connecting the first connecting short section 5 and the linear motor plunger pump shell coupling 606; the lower shell 608 of the linear motor plunger pump is a tubular structure with a hollow inner cavity, and one end of it is machined with a male buckle for connecting the linear motor plunger pump shell coupling 606 and drilled with a threading hole for the power cable 103 without an outer steel belt to pass through, and the power cable 103 without an outer steel belt is combined into one by a vulcanization process.The upper housing 604 of the linear motor plunger pump, the housing coupling 606 of the linear motor plunger pump, and the lower housing 608 of the linear motor plunger pump are connected as a whole by threads, and the combination and the plunger cavity 609 are equipped with an annular linear motor plunger pump cylinder body sealing ring 607 for isolating the working fluid in the pump barrel; the plunger cavity 609, the linear motor mover 611 and the plunger body piston 612 are an integrated structure, and the plunger cavity 609 is a cylindrical structure with a hollow inner cavity and a smooth inner wall, and the motor mover 611 is attached to the outer side of the middle, and the two are combined into one by a rubber vulcanization process, and the lower end of the plunger cavity 609 is connected to the plunger body piston 612 by welding. The plunger cavity 609 and the plunger body piston 612 can reciprocate with the linear motor mover 611, thereby realizing the downward injection of the liquid entering the pump barrel. ;

[0046] The signal transmission and positioning part I includes a positioning module and a weighting rod, the positioning module is fixedly connected to one end of the weighting rod, and the other end of the weighting rod is fixedly connected to the filter short section, and also includes a signal cable 101 and a power cable 102, the signal cable 101 is connected to the positioning module, and the power cable 102 is electrically connected to the motor stator 610; specifically, the signal cable 101 and the power cable 102 both adopt an armored cable structure with an outer steel belt, the weighting rod 3 is made of high-density tungsten steel, the signal cable 101 and the power cable 102 are wrapped together with a special outer steel belt to form an armored bus 1, which is forked near the positioning module 2 where the positioning module can use a magnetic locator or a gamma instrument The outer steel belt is forked in a Y shape and divided into a signal cable 101 and a power cable 102. The signal cable 101 is connected to a magnetic locator or a gamma instrument, and the power cable 102 extends all the way to be electrically connected to the linear motor plunger pump 6, wherein the power cable 103 without an outer steel belt is fixed to the weighting rod 3 and the linear motor plunger pump 6 by a special clip; the magnetic locator or the gamma instrument is a specific integrated structure, one side of which is connected to the signal cable 101, and the other side is processed with a male buckle connected to the weighting rod 3; the weighting rod 3 is a solid rod-shaped structure made of high-density tungsten steel, one side of which is processed with a female buckle connected to the magnetic locator or the gamma instrument, and the other side is processed with a conical male buckle connected to the filter short section 4.

[0047] The lower righting portion V comprises a second righting module, and a terminal end of the second righting module is fixedly connected to the guide cone.

[0048] The first righting module or the second righting module comprises a righting part body, which is an axially through-tubular structure, and a plurality of indented righting part body grooves are arranged on its outer wall, a righting part support block is installed in the righting part body groove, a righting part leaf spring is installed between the righting part support block and the righting part body groove, and a roller is installed on the outer wall of the righting part support block.

[0049] In this embodiment, the upper righting part III includes a hand-release joint 7, a second connecting short section 8, and a first righting module 11. Except for the hand-release joint 7, the remaining rigid parts of the upper righting part III are all made of controllably dissolvable aluminum-based alloy. The aluminum-based alloy material can dissolve itself within a set time under the wellbore temperature and the alkaline liquid condition injected into the wellbore. In order to enhance its own wear resistance, the roller 1104 is also coated with a circle of TiN wear-resistant coating along the outer edge of its own wheel disc. The structure of the hand-release joint 7 is generally a tubular structure with a through inner cavity. A portion for The trapezoidal female buckle connected to the linear motor plunger pump 6 has a smooth inner cavity at the other end for inserting and placing the second connecting short section 8. The hand-release upper joint 7 is connected to the second connecting short section 8 by a shear pin; the upper pressure cap 9 of the elastic straightening part is a short tubular structure with a through hole in the middle, one end of its inner cavity is processed with a spherical hole for placing the hollow ball end of the second connecting short section 8, and is processed with an annular sealing ring groove for placing a sealing ring, and the other end is processed with a female buckle connected to the upper joint 10 of the elastic straightening part, and is processed with a corresponding sealing ring groove; the upper joint 10 of the elastic straightening part is generally in the shape of a boss, the outer diameter of the middle part of which is the largest, and on one side thereof The corresponding conical chamfer is processed, and the other side is vertically cut without chamfer. The outer diameter of the end of the joint 10 on the elastic straightening part close to the conical chamfer is smaller, and a male buckle for connecting the pressure cap 9 on the elastic straightening part is turned on the outer side. The outer diameter of the other end opposite to it is also smaller, and a female buckle for connecting the first straightening part main body 1101 is cut in the inner cavity and processed with a corresponding sealing ring. The first straightening part main body 1101 presents a circular tubular structure with a central through-hole as a whole, the middle of which is concave and has a plurality of longitudinally concave first straightening part main body grooves 1106 turned thereon for placing the first straightening part support block. The first straightening part main body 45° chamfers are also processed on both sides of the middle part of the outer side of 1101; the first straightening part body 1101 is processed with a male buckle for connecting the two at one end close to the elastic straightening part upper joint 10, and a chamfered step is machined, and the other end opposite thereto is processed with a trapezoidal male buckle for connecting with the elastic straightening part lower joint 12; the first straightening part support block is partially installed in the groove of the first straightening part body, and is limited by the hoop 1102 sleeved on the outer side of the first elastic straightening part body 1101, and the hoop 1102 is connected to the first straightening part body 1101 through the first elastic straightening part pin 1107;The first straightening part support block 1103 is a cylindrical structure with 45° chamfers machined on both sides and a through hole with a thick middle and thin ends machined in the middle. There are 4 grooves distributed circumferentially on the outside of the first straightening part body 1101, and two balls 1104 are installed on the outside of each first straightening part support block 1103. A first straightening part leaf spring 1105 is also installed between the inside of the first straightening part support block 1103 and the groove 1106 of the first straightening part body, so as to realize self-straightening of the entire tool string in the horizontal section of the wellbore through the elastic support of the first straightening part leaf spring 1105 and the rolling of the roller 1104; in addition, a step and a female buckle for accommodating and connecting an elastic check valve 1108 are also processed in the inner cavity of the first straightening part body 1101, and a conical plug 1108a and a rubber spring 1104 of the elastic check valve are provided. 108b are made of degradable rubber with a certain thickness of protective coating on the surface, and the two are combined together by rubber vulcanization process. The metal gasket screen 1108c is made of soluble aluminum-based alloy, and six flow holes 1108d are drilled and milled on it. The metal gasket screen is connected to the inner cavity of the first straightening part body 1101 through the threaded thread turned in the circumference, which is convenient for limiting and pressing the rubber spring 1108b and the tapered plug 1108a. When the tapered plug 1108a compresses the rubber spring 1108b under fluid pressure, the elastic check valve can be opened to allow the fluid to pass through the elastic check valve; when the expansion rubber cartridge setting module is set, the fluid pressure inside and outside the elastic check valve reaches equilibrium, and at this time, the tapered plug blocks the first straightening module, so that the fluid no longer flows to the rubber cartridge setting part through the elastic check valve. ;

[0050] The lower straightening part V includes a second straightening module 25, the end of which is fixedly connected to the guide cone, and the second straightening module includes a straightening part body, which is an axially through-tubular structure, and a plurality of indented straightening part body grooves are arranged on its outer wall, a straightening part support block is limitedly installed in the straightening part body groove, a straightening part leaf spring is installed between the straightening part support block and the straightening part body groove, and a roller is installed on the outer wall of the straightening part support block; specifically, the second straightening part body 2501 is a circular tubular structure with a through center as a whole, the middle of which is concave and has a plurality of longitudinal indentations machined therein. The second straightening part main body groove 2506 is used to place the second straightening part support block, and the second straightening part main body 2501 is also processed with 45° chamfers on both sides of the middle part of the outer side; the second straightening part main body 2501 is processed with a trapezoidal male buckle for connecting the two at one end close to the second expansion rubber cylinder lower joint 24, and the other end opposite thereto is processed with a trapezoidal male buckle for connecting with the guide cone 26; the second straightening part support block is partially installed in the second straightening part main body groove, and is limited by the second straightening part hoop 2502 which is sleeved on the outer side of the second straightening part main body 2501, and is pinned by the second straightening part The nail 2507 is connected to the second straightening part body 2501; the second straightening part support block 2503 is a cylindrical structure with 45° chamfers on both sides and a through hole with a thick middle and thin ends machined in the middle. There are 4 grooves distributed in the circumferential direction on the outside of the second straightening part body 2501, and two rollers 2504 are installed on the outside of each second straightening part support block 2503; a second straightening part leaf spring 2505 is also installed between the inner side of the second straightening part support block 2503 and the second straightening part body groove 2506, so as to support the second straightening part leaf spring 2505 through the elastic support and rollers. The rolling of the wheel 2504 realizes the self-righting of the entire tool string in the horizontal section of the wellbore; wherein, the second expansion rubber cylinder lower joint 24, the second righting module 25, and the guide cone 26 are all made of soluble aluminum alloy that can be controllably dissolved in an alkaline salt solution. To enhance its own wear resistance, the roller 2504 is also coated with a circle of TiN wear-resistant coating along the outer edge of its own wheel disc; the guide cone 26 is in appearance a bullet-shaped structure, one end of which is closed, and the other end of the inner cavity is processed with a male buckle for connecting with the second righting part body 2501 and a blind hole is machined. The bullet-shaped structure is conducive to the introduction and lowering of the tool in a curved wellbore.

[0051] The expansion rubber cylinder sealing module includes a central tube of the expansion rubber cylinder, an inner capsule of the expansion rubber cylinder, and an outer layer of the expansion rubber cylinder. The central tube of the expansion rubber cylinder is provided with a liquid outlet. The outer layer of the expansion rubber cylinder includes a rubber cylinder frame and an outer layer rubber cylinder. The rubber cylinder frame includes a plurality of support plates. The support plates are dispersed on the inner wall of the outer layer rubber cylinder, and both ends thereof are fixedly connected to both ends of the outer layer rubber cylinder. The inner capsule of the expansion rubber cylinder is sleeved on the central tube of the expansion rubber cylinder, and one end thereof is fixedly connected to one end of the central tube of the expansion rubber cylinder, and the other end can move in an axial sealing manner along the central tube of the expansion rubber cylinder. The outer layer of the expansion rubber cylinder is sleeved on the outside of the inner capsule of the expansion rubber cylinder, and one end thereof is fixedly connected to one end of the central tube of the expansion rubber cylinder, and the other end can move in an axial sealing manner along the central tube of the expansion rubber cylinder.

[0052] The rotating shafts at both ends of the third connecting short section 18 expand circumferentially to form a convex arc surface structure, an arc-shaped hole matching the arc surface structure is formed in the expansion rubber cartridge setting module, and a chamfer is formed at the outer edge of the connection between the expansion rubber cartridge setting module and the third connecting short section 18.

[0053] In the present embodiment, there are two expansion rubber cartridge sealing modules, namely, a first expansion rubber cartridge sealing module 14 and a second expansion rubber cartridge sealing module 22, which are connected by a third connecting short section 18. Specifically, the first expansion rubber cartridge sealing module 14 includes a first expansion rubber cartridge outer layer rubber cartridge fixing joint 1401, a first expansion rubber cartridge inner capsule sliding sleeve 1402, a first expansion rubber cartridge center tube 1403, a first expansion rubber cartridge inner capsule 1404, a first rubber cartridge skeleton 1406, a first outer layer rubber cartridge 1407 and a first expansion rubber cartridge lower fixing joint 15; the first expansion rubber cartridge sealing module 14 is connected to the upper straightening portion through the elastic straightening portion lower joint 12, and the elastic straightening portion lower joint 12 is in the shape of a boss with a through hole in appearance as a whole, and its One side is processed with a conical male buckle for connecting to the first straightening module 11, and the other end has a relatively small outer diameter, and its inner cavity is processed with a male buckle for connecting to the first expansion rubber tube center tube 1403, and the outer cavity of this end is finely ground and polished, and is processed with an annular sealing ring groove and an annular sealing ring is placed; the overall appearance of the sliding joint 13 on the first expansion rubber tube is also a boss with a through hole, and the inner cavity of one side is finely ground and polished, and the inner cavity of this side is penetrated by the lower joint 12 of the elastic straightening part, and the outer side of the other side is processed with a male buckle for connecting to the first expansion rubber tube outer layer rubber tube fixed joint 1401, the interior is finely ground and polished, and is processed with a sealing ring groove for placing an annular sealing ring, and the inner cavity of the sliding joint 13 on the first expansion rubber tube is penetrated There is a first expansion rubber tube central tube 1403; the first expansion rubber tube outer layer rubber tube fixed joint 1401 is short cylindrical in overall appearance, one end of which is processed with a female buckle for connecting to the sliding joint 13 on the first expansion rubber tube, and the other end is connected to the first rubber tube skeleton 1406 and one end of the first outer layer rubber tube 1407 through a vulcanization process; the first expansion rubber tube inner capsule sliding sleeve 1402 is annular in overall appearance, sleeved on the outer side of the first expansion rubber tube central tube 1403, its inner cavity is hollow, processed with two annular sealing ring grooves and a sealing ring is placed, and its outer side is vulcanized with one end of the first expansion rubber tube inner capsule 1404; the first expansion rubber tube central tube 1403 is long tubular in overall appearance, and its middle part is axially respectively Two liquid outlet holes are symmetrically processed to pump fluid into the first expansion rubber cylinder inner capsule 1404 to expand the expansion rubber cylinder setting module 14. A male buckle for connecting to the lower joint 12 of the elastic straightening part is machined on the outer side of one end of the first expansion rubber cylinder center tube 1403, and a male buckle for connecting to the inner cavity of the lower joint 16 of the first expansion rubber cylinder is machined on the outer side of the other end, and a first expansion rubber cylinder center tube step 1405 is processed, wherein the first expansion rubber cylinder center tube step 1405 and the other end of the first expansion rubber cylinder inner capsule 1404 are vulcanized into a whole, so as to fix the end of the first expansion rubber cylinder inner capsule 1404, so that it will not move with the expansion and contraction of the first expansion rubber cylinder inner capsule 1404 when the fluid is injected;The first expansion rubber cylinder inner capsule 1404 has an overall appearance of a dumbbell-shaped cylindrical structure that is slightly thicker at both ends and slightly thinner in the middle. One end of the first expansion rubber cylinder inner capsule is vulcanized together with the first expansion rubber cylinder inner capsule sleeve 1402, and the other end is vulcanized and combined with the first expansion rubber cylinder center tube step 1405. The first expansion rubber cylinder inner capsule 1404 can expand due to the filtered wellbore liquid injected through the liquid outlet holes of the first expansion rubber cylinder center tube 1403. During the expansion process, one end of the first expansion rubber cylinder inner capsule 1404 that is vulcanized together with the first expansion rubber cylinder inner capsule sleeve 1402 slides toward the middle to expand and deform laterally. When the first expansion rubber cylinder inner capsule 1404 expands and deforms to a certain extent, it squeezes the first rubber cylinder skeleton 1406 and the first outer shell from the inside out. The first rubber tube frame 1406 is made of soluble aluminum alloy that can be controlled to dissolve in alkaline salt solution, and is a cylindrical shape made by bundling multiple slender strip-shaped soluble aluminum alloy strips. After expansion and deformation, it can present a lantern shape due to the expansion of the middle part. The two ends of the first rubber tube frame 1406 are respectively vulcanized and connected to the first outer rubber tube 1407 as a whole; the first outer rubber tube 1407 presents a cylindrical structure with a raised middle part in overall appearance, and the raised part is relatively aligned with the positions of several groups of liquid outlet holes drilled and milled on the side wall of the central tube of the first expansion rubber tube, and the two ends are respectively vulcanized and connected to the outer rubber tube of the first expansion rubber tube. 1401, the first expansion rubber tube lower fixed joint 15 are connected as a whole; one end of the first expansion rubber tube outer layer rubber tube fixed joint 1401 can drive the first expansion rubber tube upper sliding joint 13 and the first expansion rubber tube outer layer rubber tube fixed joint 1401 to slide and shrink along the axial direction of the first expansion rubber tube central tube 1403 along with the expansion and deformation of the first rubber tube skeleton 1406 and the first outer layer rubber tube 1407, thereby facilitating the expansion and deformation of the first rubber tube skeleton 1406 and the first outer layer rubber tube 1407; the first expansion rubber tube lower fixed joint 15 and the first expansion rubber tube outer layer rubber tube fixed joint 1401 have similar structures, both of which are cylindrical structures, and one end of which is connected to the first outer layer by vulcanization process The first expansion rubber tube lower joint 16 is connected to the first expansion rubber tube 1407, and the other end is machined with a male buckle for connecting with the first expansion rubber tube lower joint 16; the first expansion rubber tube lower joint 16 is a boss-like structure with a hollow inner cavity in appearance, and the inner side of one end thereof is machined with a female buckle for connecting with the first expansion rubber tube central tube 1403 and a circular sealing ring groove for accommodating a sealing ring, and the outer side is machined with a male buckle for connecting with the first expansion rubber tube lower fixed joint 15, the middle annular protrusion of the first expansion rubber tube lower joint 16 is machined with a 30° chamfer on the side close to the first expansion rubber tube lower pressure cap 17, and the other side of the first expansion rubber tube lower joint 16 is machined with a male buckle for connecting with the first expansion rubber tube lower pressure cap 17;The first expansion rubber tube pressing cap 17 is a short tubular structure with a through hole in the middle, and one end of its inner cavity is processed with a spherical hole for placing the hollow ball end of the third connecting short section 18, and a ring-shaped sealing ring groove for placing the sealing ring. In order to facilitate the free movement of the third connecting short section 18, the outer edge of the inner cavity on one side of the end processed with the spherical hole is also chamfered with 20-25°, and the other end opposite thereto is processed with a female buckle connected to the first expansion rubber tube pressing cap 17, and a corresponding sealing ring groove; the third connecting short section 18 is a hollow rod-shaped structure with a "thick at both ends and thin in the middle" structural feature, and its two ends in a hollow spherical shape are respectively placed in the inner cavities of the first expansion rubber tube pressing cap 17 and the second expansion rubber tube upper pressing cap 19; the second expansion rubber tube The upper pressure cap 19 has the same structural shape as the lower pressure cap 17 of the first expansion rubber tube, and also has a short tubular structure with a through hole in the middle. One end of the inner cavity is processed with a spherical hole for placing the hollow ball end of the third connecting short section 18, and is processed with an annular sealing ring groove for placing the sealing ring. In order to facilitate the free movement of the third connecting short section 18, the outer edge of the inner cavity on the side with the spherical hole is also turned with a chamfer of 20-25°, and the other end opposite thereto is processed with a female buckle connected to the second expansion rubber tube upper joint 20, and is processed with a corresponding sealing ring groove; the structure of the second expansion rubber tube upper joint 20 is similar to that of the first expansion rubber tube lower joint 16 in appearance, and is also a boss-like structure with a hollow through inner cavity, with an annular protrusion in the middle and a corresponding sealing ring groove in the middle. A 30° chamfer is machined on the side close to the pressure cap 19 on the second expansion rubber cylinder, and a male buckle for connecting to the pressure cap 19 on the second expansion rubber cylinder is machined on the end close to the chamfer on the joint 20 on the second expansion rubber cylinder, and a female buckle for connecting to the center tube 2202 of the second expansion rubber cylinder is machined in the inner cavity of the other end opposite thereto, and a corresponding annular sealing ring groove for accommodating the sealing ring is machined, and a male buckle for connecting to the fixed joint 21 on the second expansion rubber cylinder is machined in the circumferential direction on the outer side of this end; the overall structure of the center tube 2202 of the second expansion rubber cylinder is similar to that of the center tube 1403 of the first expansion rubber cylinder, and is also in the shape of a slender tube as a whole, and two liquid outlet holes are machined symmetrically along the axial direction in the middle thereof, which are used to supply liquid to the inner capsule of the second expansion rubber cylinder Fluid is pumped into the inner cavity of 2203 to make the second expansion rubber tube inner capsule 2203 expand radially. A male buckle for connecting to the second expansion rubber tube lower joint 24 is machined on the outer side of one end of the second expansion rubber tube central tube 2202, and a male buckle for connecting to the inner cavity of the second expansion rubber tube upper joint 20 is machined on the outer side of the other end opposite thereto, and a second expansion rubber tube central tube step 2201 is machined, wherein a groove is machined on the outer side of the second expansion rubber tube central tube step 2201 and is vulcanized as a whole with one end of the second expansion rubber tube inner capsule 2203 to fix the end of the second expansion rubber tube inner capsule 2203 so that it will not move along with the expansion and contraction of the second expansion rubber tube inner capsule 2203 when the fluid is injected;The structure of the second expansion rubber cylinder inner capsule 2203 is the same as that of the first expansion rubber cylinder inner capsule 1404. Both of them are dumbbell-shaped cylindrical structures that are slightly thicker at both ends and slightly thinner in the middle. One end of the second expansion rubber cylinder inner capsule is vulcanized together with the second expansion rubber cylinder inner capsule sliding sleeve 2204, and the other end is vulcanized and combined with the second expansion rubber cylinder center tube step 2201. The second expansion rubber cylinder inner capsule 2203 can expand due to the filtered wellbore liquid injected through the liquid outlet holes of the second expansion rubber cylinder center tube 2202. During the expansion process, the end of the second expansion rubber cylinder inner capsule 2203 that is vulcanized together with the second expansion rubber cylinder inner capsule slides toward the middle to expand laterally. When the second expansion rubber cylinder inner capsule 2203 expands and deforms to a certain extent, the second rubber cylinder skeleton 2205 is squeezed from the inside to the outside, and the second outer rubber cylinder 2206 expands and deforms laterally, thereby realizing the expansion deformation of the entire second expansion rubber cylinder sealing module 22 and the sealing of this part of the rubber cylinder sealing part; the second rubber cylinder skeleton 2205 is made of soluble aluminum alloy that can be controlled to dissolve in an alkaline salt solution, and is a cylindrical shape made by bundling multiple slender strip-shaped soluble aluminum alloy strips. After expansion and deformation, it can present a lantern shape due to the expansion of the middle part. The two ends of the second rubber cylinder skeleton 2205 are respectively vulcanized. The second outer layer rubber tube 2206 is connected to the second expansion rubber tube 2206 as a whole; the second outer layer rubber tube 2206 presents a cylindrical structure with a raised middle portion in overall appearance, and the raised portion is relatively aligned with the positions of several groups of liquid outlet holes drilled and milled on the side wall of the central tube of the second expansion rubber tube, and its two ends are respectively connected to the second expansion rubber tube rubber tube fixed joint 21 and the second expansion rubber tube outer layer rubber tube fixed joint 2207 by a vulcanization process to form a whole; wherein one end connected to the second expansion rubber tube rubber tube fixed joint 21 can drive the second expansion rubber tube outer layer rubber tube with the expansion and deformation of the second rubber tube skeleton 2205 and the second outer layer rubber tube 2206 The fixed joint 2207 and the second expansion rubber tube lower sliding joint 23 slide and shrink along the axial direction of the second expansion rubber tube central tube 2202, thereby achieving expansion and deformation; the structure of the second expansion rubber tube lower sliding joint 23 is the same as the first expansion rubber tube upper sliding joint 13, and the overall appearance is also a boss with a through hole. The inner cavity on one side is finely ground and polished, and the thin end of the second straightening module 25 runs through the inner cavity on this side. The outer part of the other side is processed with a male buckle for connecting the second expansion rubber tube outer layer rubber tube fixed joint 2207, and the inner part is finely ground and polished and processed with a sealing ring groove for placing an annular sealing ring. ;

[0054] It should be noted that it can be considered that: the first expansion rubber tube inner capsule 1404 and the first outer layer rubber tube 1407 in the first expansion rubber tube setting module 14 and the second expansion rubber tube inner capsule 2203 and the second outer layer rubber tube 2206 in the second expansion rubber tube setting module 22 and the corresponding sealing rings are all made of degradable rubber with a protective coating of a certain thickness on the surface; the lower joint 12 of the elastic straightening part, the upper sliding joint 13 of the first expansion rubber tube, the outer layer rubber tube fixed joint 1401 of the first expansion rubber tube, the inner capsule sliding sleeve 1402 of the first expansion rubber tube, the central tube 1403 of the first expansion rubber tube, the central tube step 1405 of the first expansion rubber tube, the first rubber tube frame 1406, the lower fixed joint 15 of the first expansion rubber tube, and the lower joint 1 6. The remaining metal rigid supporting parts including the first expansion rubber tube lower pressure cap 17, the third connecting short section 18, the second expansion rubber tube upper pressure cap 19, the second expansion rubber tube upper joint 20, the second expansion rubber tube upper fixed joint 21, the second expansion rubber tube central tube step 2201, the second expansion rubber tube central tube 2202, the second expansion rubber tube inner capsule sliding sleeve 2204, the second expansion rubber tube outer layer rubber tube frame 2205, the second expansion rubber tube outer layer rubber tube fixed joint 2207, the second expansion rubber tube lower sliding joint 23 are all made of soluble aluminum alloy that can be controllably dissolved in alkaline salt solution; the above-mentioned degradable rubber and its protective coating, as well as the aluminum-based alloy material can be self-degraded within a controllable time under the conditions of the wellbore temperature and the alkaline salt solution of set concentration injected into the wellbore.

[0055] The construction process method of the above-mentioned flexible electric delivery type through-tubing soluble expansion packer comprises the following steps:

[0056] The isolation device is quickly lowered into the well section to be plugged through the armored cable, and the signal is sent through the signal cable to enable its own magnetic locator or gamma instrument to calibrate the depth and position, so that the rubber cylinder sealing part is accurately positioned in the relevant well section;

[0057] A starting current signal is input through the power cable of the armored cable, and electromagnetic induction occurs between the motor stator and the motor mover. The motor mover drives the linear motor plunger pump upward, and at this time the check valve opens, and the fluid in the wellbore enters the inner cavity of the filter nipple through the filter nipple, and enters the inner cavity of the plunger body through the check valve; with the multiple reciprocating motions of the linear motor plunger pump, the fluid in the wellbore is continuously squeezed into the inner cavity of the expansion rubber cylinder center tube of the rubber cylinder setting part, causing the first expansion rubber cylinder setting module and the second expansion rubber cylinder setting module to expand and deform laterally;

[0058] When the pumped-in formation fluid causes the first expansion rubber cartridge setting module and the second expansion rubber cartridge setting module to expand and reach the setting state, the elastic check valve is closed because the expansion rubber cartridge setting module cannot continue to expand with the fluid;

[0059] The filtered formation fluid is continuously pumped in by the linear motor plunger pump to increase the pumping fluid pressure in the center tube of the device. When the pressure reaches the set specification, the shear pin is cut off, and the upper righting part, the rubber cylinder sealing part, and the lower righting part are released, so that the wellbore below the device after the release can be sealed, laying the foundation for subsequent downhole construction operations;

[0060] When the underground construction is completed, an appropriate amount of Na(OH) aqueous solution is injected through the well pipe to dissolve the degradable expansion temporary plugging device in the well, thus completing the entire construction.

[0061] The above embodiments describe the present invention in detail, but the contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. Flexible electric delivery through-tubing soluble expansion packer, Features: It includes a signal transmission and positioning part, a pumping and pressing part, an upper straightening part, at least one rubber cartridge setting part, and a lower straightening part connected in sequence; The pumping and pressing part includes a filter nipple and a linear motor plunger pump, the filter nipple and the linear motor plunger pump are connected through a first connecting nipple, a plurality of liquid inlet holes are arranged on the side wall of the filter nipple, and a filter gasket is radially installed on the first connecting nipple; The upper righting part comprises a release upper joint, a second connecting short section, and a first righting module, the linear motor plunger pump is fixedly connected to the release upper joint, the other end of the release upper joint is connected to the second connecting short section through a shear pin, the other end of the second connecting short section is rotatably connected to the first righting module, and the connection angle between the second connecting short section and the first righting module is adjustable, and an elastic check valve is installed at the other end of the first righting module; The rubber cylinder setting part comprises at least two expansion rubber cylinder setting modules, the expansion rubber cylinder setting modules are rotatably connected via a third connecting short section, and the connection angle between adjacent expansion rubber cylinder setting modules is adjustable; The sealing device is lowered into the well section to be sealed, and the fluid in the wellbore enters the sealing device through the liquid inlet hole. The linear motor plunger pump works to make the fluid enter the rubber cartridge sealing part through the upper righting part, and causes the expansion rubber cartridge sealing module to expand and deform laterally to achieve sealing. After sealing, the expansion rubber cartridge sealing module can no longer take in liquid, so the elastic check valve is closed, and the linear motor plunger pump continues to work to cut the shear pin, thereby achieving the release of the upper righting part, the rubber cartridge sealing part and the lower righting part.

2. The flexible electric delivery through-tubing soluble swelling isolation device according to claim 1, Features: The upper righting part, the rubber cylinder sealing part and the lower righting part are made of degradable materials.

3. The flexible electric delivery through-tubing soluble expansion packing device according to claim 1, Features: The linear motor plunger pump comprises a plunger body and a plunger pump outer shell. A through cavity is axially arranged in the plunger body, a plunger body piston is fixedly arranged on the outer wall at one end thereof, and at least one plunger check valve is radially arranged in the cavity at the other end. A linear motor mover is fixedly installed on the outer wall of the plunger body, and a motor stator is fixedly installed on the inner wall of the plunger pump outer shell. A cylinder body sealing ring is also installed between the plunger body and the plunger pump outer shell, so that the linear motor mover and the motor stator between the cylinder body sealing ring and the plunger body piston are in a sealed state; the plunger body drives the plunger body piston to reciprocate with the linear motor mover, thereby realizing the suction and pumping out of the liquid.

4. The flexible electric delivery through-tubing soluble swelling isolation device according to claim 1, Features: The signal transmission and positioning part comprises a positioning module and a weighting rod, wherein the positioning module is fixedly connected to one end of the weighting rod, and the other end of the weighting rod is fixedly connected to the filtering nipple.

5. The flexible electric delivery through-tubing soluble swelling isolation device according to claim 1, Features: The lower righting part comprises a second righting module, and a terminal end of the second righting module is fixedly connected to the guide cone.

6. The flexible electric delivery through-tubing soluble swelling isolation device according to claim 5, Features: The first righting module or the second righting module comprises a righting part body, which is an axially through-tubular structure, and a plurality of indented righting part body grooves are arranged on its outer wall, a righting part support block is installed in the righting part body groove, a righting part leaf spring is installed between the righting part support block and the righting part body groove, and a roller is installed on the outer wall of the righting part support block.

7. The flexible electric delivery type through-oil-pipe soluble swelling sealing device according to claim 4, Features: The elastic check valve comprises a conical plug, a rubber spring and a metal gasket screen; the conical plug is connected to the metal gasket screen through the rubber spring, and the metal gasket screen is provided with a flow hole. When the conical plug compresses the rubber spring under fluid pressure, the elastic check valve can be opened; When the expansion rubber cartridge setting module is set, the fluid pressure inside and outside the elastic check valve reaches equilibrium, and the conical plug blocks the first righting module, so that the fluid no longer flows through the elastic check valve to the rubber cartridge setting part.

8. The flexible electric delivery through-tubing soluble swelling isolation device according to claim 7, Features: The expansion rubber cylinder sealing module includes a central tube of the expansion rubber cylinder, an inner capsule of the expansion rubber cylinder, and an outer layer of the expansion rubber cylinder. The central tube of the expansion rubber cylinder is provided with a liquid outlet. The outer layer of the expansion rubber cylinder includes a rubber cylinder frame and an outer layer rubber cylinder. The rubber cylinder frame includes a plurality of support plates. The support plates are dispersed on the inner wall of the outer layer rubber cylinder, and both ends thereof are fixedly connected to both ends of the outer layer rubber cylinder. The inner capsule of the expansion rubber cylinder is sleeved on the central tube of the expansion rubber cylinder, and one end thereof is fixedly connected to one end of the central tube of the expansion rubber cylinder, and the other end can move in an axial sealing manner along the central tube of the expansion rubber cylinder. The outer layer of the expansion rubber cylinder is sleeved on the outside of the inner capsule of the expansion rubber cylinder, and one end thereof is fixedly connected to one end of the central tube of the expansion rubber cylinder, and the other end can move in an axial sealing manner along the central tube of the expansion rubber cylinder.

9. The flexible electric delivery through-tubing soluble swelling isolation device according to claim 1, Features: Both ends of the third connecting short section expand circumferentially to form a convex arc surface structure, an arc-shaped hole matching the arc surface structure is formed in the expansion rubber cartridge setting module, and a chamfer is formed at the outer edge of the connection between the expansion rubber cartridge setting module and the third connecting short section.

10. A construction process method based on the flexible electric delivery through-tubing soluble swelling packer device according to claim 8, It is characterized in that The steps include: The isolation device is lowered into the well, and the rubber cylinder sealing part is positioned to the well section to be blocked by the positioning module; The linear motor plunger pump works, and the fluid in the wellbore enters the inner cavity of the filter nipple through the filter nipple. With the multiple reciprocating motions of the linear motor plunger pump, the fluid in the wellbore that enters through the filter nipple presses open the tapered plug of the elastic check valve, and is continuously squeezed into the inner cavity of the central tube of the expansion rubber tube of the rubber tube sealing part, causing the inner capsule and the outer layer of the expansion rubber tube to expand and deform laterally; When the pumped fluid expands the expansion rubber cartridge sealing module and reaches the sealing state, the elastic check valve is closed because the expansion rubber cartridge sealing module cannot continue to expand and the internal and external fluid pressures reach equilibrium; the linear motor plunger pump continues to work, and the pumped fluid pressure gradually increases. When the pressure increases to the point where the shear pin is sheared off, the upper righting part, the rubber cartridge sealing part, and the lower righting part are released, and the wellbore below the device after the release can be closed; When the underground construction is completed, degradable liquid is injected through the well pipe to dissolve the equipment in the well and complete the construction.

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