An electric packer and water blending integrated working barrel

Abstract

The present invention relates to the technical field of separate layer water injection, and discloses an electric packer and water distribution integrated working barrel, which is arranged inside the casing and includes a plugging device and a water distributor. The plugging device is connected to the water distributor through an intermediate connecting pipe. The plugging device includes a packer rubber cylinder and a hydraulic mechanism. The hydraulic mechanism is used to inject hydraulic oil into the inner cavity inside the packer rubber cylinder. An adjusting mechanism is also installed in the inner cavity. The adjusting mechanism drives the hydraulic mechanism to close when the packer rubber cylinder fits with the inner wall of the casing. During the use of the adjusting mechanism of the present invention, when wear occurs on the surface of the packer rubber cylinder, the deformation amount of the packer rubber cylinder also increases accordingly. Therefore, although wear occurs on the surface of the packer rubber cylinder, the problem of reduced contact pressure with the inner wall of the casing caused by wear can be compensated by increasing its deformation amount, that is, the radial stretching amount.

Description

Technical Field

[0001] The present invention relates to the technical field of stratified water injection, and specifically to an electric packer and water distribution integrated working barrel. Background Art

[0002] Stratified water injection refers to a water injection method in which packers are lowered into an injection well to separate oil layers with large differences, and then water distributors are used for stratified water distribution, so that the water injection volume of high-permeability layers is controlled, and the water injection of medium- and low-permeability oil layers is strengthened, enabling various oil layers to play their roles. In the exploitation of heterogeneous multi-layer oil reservoirs, in order to strengthen medium- and low-permeability layers and control the water injection of high-permeability layers, a water injection method that realizes stratified control injection in an injection well according to the injection allocation requirements has now become an important means to solve the interlayer contradiction in the process of oilfield development, maintain the long-term stable and high-yield production of the oilfield, and improve the recovery rate.

[0003] For example, the patent with the publication number CN119553987A and the publication date of March 4, 2025 discloses a water injection packer, which relates to the technical field of oilfield exploitation. It includes a central pipe, and an upper joint and a lower joint are respectively connected to the upper end and the lower end of the central pipe. The characteristics are as follows: a plugging mechanism is connected to the central pipe near the middle position. The plugging mechanism includes a rubber cylinder and a cylinder sleeve sleeved on the outer side wall of the central pipe. The cylinder sleeve is slidably connected to the central pipe up and down, and the rubber cylinder is arranged outside the cylinder sleeve; an extrusion and propulsion mechanism is arranged below the rubber cylinder on the outside of the central pipe. The extrusion and propulsion mechanism includes a cylinder sleeve, a piston plate, a backwashing sleeve, and a backwashing valve. The cylinder sleeve is sleeved on the outside of the lower joint and is fixedly connected to the lower joint. A piston plate is arranged above the lower joint between the cylinder sleeve and the central pipe. A backwashing valve is arranged above the piston plate. The backwashing sleeve is sleeved on the outside of the backwashing valve, and the backwashing sleeve is fixedly connected to the cylinder sleeve. The lower joint and the cylinder sleeve are connected by a control pin; a setting and locking mechanism is arranged above the rubber cylinder on the outside of the central pipe. A releasing mechanism is connected to the setting and locking mechanism. A backwashing channel is arranged between the cylinder sleeve and the central pipe. A backwashing hole C is arranged on the side surface of the locking sleeve, a backwashing hole B is arranged on the side surface of the cylinder sleeve, the backwashing hole C and the backwashing hole B are communicated with the backwashing channel, and a backwashing hole A is arranged on the side surface of the backwashing sleeve.

[0004] The packer rubber cylinder on the existing plugging device seals a specific section of the casing by its own expansion. The expansion methods include mechanical extrusion and hydraulic pressure, etc. When using the hydraulic method, the hydraulic mechanism injects hydraulic oil into the inner cavity of the rubber cylinder, and the rubber cylinder expands to seal the annulus between the tubing and the casing. Most of the existing ones inject hydraulic oil into the inner cavity and stop injecting hydraulic oil after the pressure in the inner cavity reaches the set value. However, in actual use, the rubber cylinder expands under the action of hydraulic pressure. When it contacts the casing wall, sliding friction occurs due to the difference in surface roughness, and the friction will cause wear on the surface of the rubber cylinder. Since the surface wear does not affect the pressure change in the inner cavity, when the hydraulic mechanism injects hydraulic oil according to the previously set pressure to make the worn rubber cylinder expand, the contact pressure between the worn rubber cylinder and the inner wall of the casing decreases, resulting in a reduction in the sealing effect, thus affecting the use of the plugging device in the casing. Summary of the Invention

[0005] The purpose of the present invention is to provide an electric packer and water distribution integrated working barrel to solve the above deficiencies in the prior art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An electric packer and water distribution integrated working barrel is arranged inside the casing and includes a plugging device and a water distributor. The plugging device is connected to the water distributor through an intermediate connecting pipe. The plugging device includes a packer rubber cylinder and a hydraulic mechanism. The hydraulic mechanism is used to inject hydraulic oil into the inner cavity inside the packer rubber cylinder. An adjusting mechanism is also installed in the inner cavity. The adjusting mechanism drives the hydraulic mechanism to close when the packer rubber cylinder fits with the inner wall of the casing.

[0007] Preferably, an upper joint is installed at one end of the plugging device away from the water distributor, and a lower joint is installed at one end of the water distributor away from the plugging device.

[0008] Preferably, the plugging device is electrically connected to the water distributor, and cable connectors are provided at both ends of the plugging device and the water distributor that are away from each other. The cable connectors are used to connect external wire bodies.

[0009] Preferably, rubber cylinder retaining rings are also provided at both ends of the packer rubber cylinder. A limiting groove is formed inside the rubber cylinder retaining ring. The limiting groove is in a ring structure, and both ends of the packer rubber cylinder are clamped and limited in the limiting groove.

[0010] Preferably, central flow-through pipes are installed at the central positions of the plugging device and the water distributor. Flow-through channels are formed inside both groups of central flow-through pipes. A butt flow-through pipe is installed inside the intermediate connecting pipe. The two groups of central flow-through pipes are connected to each other through the butt flow-through pipe.

[0011] Preferably, the space enclosed by the outer wall of the central flow-through pipe in the plugging device, the inner wall of the packer rubber cylinder, and the inner wall of the rubber cylinder retaining ring is the inner cavity.

[0012] Preferably, the adjusting mechanism includes a connecting ring and a piston plate. The connecting ring is sleeved on the central flow tube inside the plugger. A receiving groove is formed between the connecting ring and the central flow tube. The piston plate is installed inside the receiving groove and dynamically seals the inner wall of the connecting ring and the outer wall of the central flow tube. A spring and a trigger member are also installed inside the receiving groove. The trigger member is connected to the inner wall of the connecting ring. One end of the spring is connected to the connecting ring, and the other end is connected to the piston plate.

[0013] Preferably, a supporting mechanism is also installed in the inner cavity, the supporting mechanism is connected to the piston plate, and the supporting mechanism is used to squeeze the sealing rubber tube against the inner wall of the sleeve from the inside after the sealing rubber tube is radially stretched.

[0014] Preferably, the supporting mechanism includes a first connecting rod, a wedge block, a second connecting rod and a supporting block, one end of the first connecting rod is connected to the outer wall of the piston plate, and the other end is connected to the inner wall of the rubber cylinder pressure ring, the two ends of the second connecting rod are respectively connected to two groups of rubber cylinder pressure rings, the first connecting rod is located on the side of the second connecting rod close to the central axis of the sealing rubber cylinder, the wedge block is installed on the first connecting rod, and the second connecting rod is provided with a hole, the support block is located in the hole and forms a sliding guide fit with the hole, the lower end face of the support block is an inclined surface, the support block and the wedge block form a wedge-shaped fit, the wedge block has a right-angle trapezoidal structure, and a telescopic section is provided at the end of the first connecting rod facing away from the piston plate.

[0015] Preferably, a plurality of support mechanisms are provided, and all are connected to the piston plate, and the plurality of support mechanisms are equidistantly distributed in a circle around the central axis of the sealing rubber cylinder.

[0016] The beneficial effect of the present invention is that in the above technical scheme, when the adjusting mechanism of the present invention is in use, when the surface of the sealing rubber tube is worn, the adjusting mechanism causes the deformation of the sealing rubber tube to increase accordingly. Therefore, although the surface of the sealing rubber tube is worn, the problem of reduced contact pressure with the inner wall of the casing caused by wear can be compensated by increasing its deformation, that is, the radial stretching. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A schematic diagram of the structure provided by an embodiment of the present invention;

[0019] Figure 2 An internal cross-sectional view of a sealing rubber tube provided in an embodiment of the present invention;

[0020] Figure 3 The embodiment of the present invention provides Figure 2 A in the enlarged view;

[0021] Figure 4 For the embodiment of the present invention Figure 2 is an enlarged view at position B in

[0022] Explanation of reference numerals:

[0023] 1. Plugging device; 11. Packing rubber cylinder; 111. Inner cavity; 12. Adjusting mechanism; 121. Connecting ring; 122. Piston plate; 123. Spring; 124. Accommodating groove; 125. Triggering member; 13. Hydraulic mechanism; 14. Upper joint; 15. Cable joint; 16. Rubber cylinder pressing ring; 17. Central flow-through pipe; 18. Support mechanism; 181. First connecting rod; 182. Wedge block; 183. Telescopic section; 184. Second connecting rod; 185. Support block; 2. Water distributor; 21. Lower joint; 3. Intermediate connecting pipe; 4. Casing. Detailed implementation manners

[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further introduced in detail below with reference to the accompanying drawings.

[0025] In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0026] As Figures 1-4 shown, the embodiment of the present invention provides an electric packer and water distributor integrated working barrel, which is arranged inside the casing 4 and includes a plugging device 1 and a water distributor 2. The plugging device 1 is connected to the water distributor 2 through an intermediate connecting pipe 3. The plugging device 1 includes a packing rubber cylinder 11 and a hydraulic mechanism 13. The hydraulic mechanism 13 is used to inject hydraulic oil into the inner cavity 111 inside the packing rubber cylinder 11. An adjusting mechanism 12 is also installed in the inner cavity 111. When the packing rubber cylinder 11 fits with the inner wall of the casing 4, the adjusting mechanism 12 drives the hydraulic mechanism 13 to close.

[0027] Specifically, an upper joint 14 is installed at one end of the plugging device 1 away from the water distributor 2, and a lower joint 21 is installed at one end of the water distributor 2 away from the plugging device 1. The upper joint 14 and the lower joint 21 are respectively used for the connection between the plugging device 1 and the upper oil pipe, and between the water distributor 2 and the lower oil pipe. Moreover, the plugging device 1 and the water distributor 2 are electrically connected, and cable connectors 15 are provided at the ends of the plugging device 1 and the water distributor 2 that are far away from each other. The cable connectors 15 are used to connect external wire bodies for power supply and signal transmission. Rubber cylinder pressing rings 16 are also provided at both ends of the sealing rubber cylinder 11. A limiting groove is formed inside the rubber cylinder pressing ring 16, and the limiting groove is in a ring structure. Both ends of the sealing rubber cylinder 11 are clamped and limited in the limiting groove.

[0028] Central flow pipes 17 are installed at the central positions of both the plugging device 1 and the water distributor 2. Flow channels are formed inside the two groups of central flow pipes 17. A butt joint flow pipe (not shown) is installed inside the intermediate connecting pipe 3. The two groups of central flow pipes 17 are connected to each other through the butt joint flow pipe, that is, the flow channels in the two groups of central flow pipes 17 are interconnected through the butt joint flow pipe. A flow measurement pipe, a nozzle short section, a seal inspection short section, etc. are also installed inside the water distributor 2. These are all conventional structures inside the water distributor 2 and are all prior arts. Secondly, this embodiment does not improve the above parts, so they will not be elaborated. The space enclosed by the outer wall of the central flow pipe 17 inside the plugging device 1, the inner wall of the sealing rubber cylinder 11, and the inner wall of the rubber cylinder pressing ring 16 is the inner cavity 111, and the adjusting mechanism 12 is installed in the inner cavity 111.

[0029] During actual use, the plugging device 1 and the water distributor 2 are driven to extend into the casing 4. When the plugging device 1 extends to a specified position inside the casing 4, the hydraulic mechanism 13 injects hydraulic oil into the inner cavity 111. The pressure in the inner cavity 111 gradually increases with the injection of the hydraulic oil. As the pressure increases, the sealing rubber cylinder 11 begins to deform, that is, radially stretch. After deformation, the sealing rubber cylinder 11 gradually contacts the inner wall of the casing 4. With the continuous injection of the hydraulic oil, until the outer wall of the sealing rubber cylinder 11 closely fits on the inner wall of the casing 4, and blocked by the casing 4, the sealing rubber cylinder 11 cannot continue to radially stretch. Then, the adjusting mechanism 12 drives the hydraulic mechanism 13 to close the continuous delivery of the hydraulic oil. Although wear occurs on the surface of the sealing rubber cylinder 11, the appearance of the wear increases the deformable space between the sealing rubber cylinder 11 and the inner wall of the casing 4. And through the setting of the adjusting mechanism 12, the continuous delivery of the hydraulic oil is detected and the delivery of the hydraulic oil is closed after it is detected that the sealing rubber cylinder 11 cannot continue to stretch blocked by the casing 4. That is to say, after wear occurs, the deformation amount of the sealing rubber cylinder 11 also increases accordingly. Therefore, even though wear occurs on the surface of the sealing rubber cylinder 11, the problem of reduced contact pressure with the inner wall of the casing 4 caused by wear can be compensated by increasing its deformation amount, that is, the radial stretching amount.

[0030] In this embodiment, the connection between the plugging device 1 and the water distributor 2 enables the user to perform water injection operations during plugging, reducing the workload and difficulty in intelligent layered water injection construction operations and improving efficiency.

[0031] In an alternative embodiment, the adjusting mechanism 12 includes an adapter ring 121 and a piston plate 122. The adapter ring 121 is sleeved on the central flow-through pipe 17 inside the plugging device 1. An accommodation groove 124 is formed between the adapter ring 121 and the central flow-through pipe 17. The piston plate 122 is installed inside the accommodation groove 124 and is movably and sealingly connected to the inner wall of the adapter ring 121 and the outer wall of the central flow-through pipe 17. A spring 123 and a trigger member 125 are also installed inside the accommodation groove 124. The trigger member 125 is connected to the inner wall of the adapter ring 121. One end of the spring 123 is connected to the adapter ring 121, and the other end is connected to the piston plate 122.

[0032] Specifically, the packer rubber cylinder 11 is composed of clamping portions at both ends and a stretching portion in the middle. The clamping portions are located in the limiting grooves and are clamped and limited by the rubber cylinder pressing ring 16. The stretching portion in the middle is gradually radially stretched as the pressure in the inner cavity 111 increases. The stretching portion of the packer rubber cylinder 11, the central flow-through pipe 17, and the rubber cylinder pressing ring 16 enclose to form the inner cavity 111; the trigger member 125 can be a detection component such as a pressure sensor or a contact sensor, which is prior art and will not be elaborated here.

[0033] The accommodation groove 124 is in a ring structure, and the opening of the accommodation groove 124 faces the hydraulic mechanism 13. The piston plate 122 is initially located at the opening of the accommodation groove 124. At this time, the spring 123 is in a natural state. The trigger member 125 is installed in the middle of the adapter ring 121 and has a certain distance from the piston plate 122 in the initial state. The accommodation groove 124 and the inner cavity 111 are separated by the piston plate 122. During actual use, hydraulic oil of the hydraulic mechanism 13 is injected into the inner cavity 111. As the hydraulic oil continues to be injected, the pressure in the inner cavity 111 gradually increases. At this time, the packer rubber cylinder 11 gradually expands as the hydraulic oil is injected, that is, the stretching portion of the packer rubber cylinder 11 is radially stretched. During this process, since the spring 123 supports the piston plate 122 and the spring 123 has a certain stiffness, that is, the spring 123 is not easily contracted, so during the radial stretching of the packer rubber cylinder 11, the spring 123 will support the piston plate 122 to remain at the initial position, that is, the opening of the accommodation groove 124, or will move slightly into the accommodation groove 124, but will not contact the trigger member 125.

[0034] With the continuous injection of hydraulic oil, when the packing rubber cylinder 11 undergoes radial deformation and is in close contact with the inner wall of the casing 4, and the obstruction of the casing 4 causes the packing rubber cylinder 11 to be unable to continue radial deformation, since the packing rubber cylinder 11 cannot be stretched at this time, that is, the size of the space of the inner cavity 111 is fixed at this time, so the continuous injection of oil into the inner cavity 111 by the hydraulic mechanism 13 will force the piston plate 122 to slide in the receiving groove 124, that is, move towards the side away from the inner cavity 111. At this time, the spring 123 begins to be forced to contract, and part of the space at the opening of the receiving groove 124 communicates with the inner cavity 111 as the piston plate 122 moves, that is, indirectly enlarges the size of the space of the inner cavity 111. Until the piston plate 122 moves and contacts the trigger member 125, the trigger member 125 receives a trigger signal, the trigger member 125 sends a signal to the hydraulic mechanism 13, the hydraulic mechanism 13 stops delivering the hydraulic oil in the inner cavity 111, and at the same time closes the on-off valve on the hydraulic pipeline in the hydraulic mechanism 13. At this time, the pressure in the inner cavity 111 remains constant, and the packing rubber cylinder 11 fits tightly inside the casing 4, that is, the plugging device 1 and the water distributor 2 are limited and fixed inside the casing 4. When it is necessary to remove the plugging device 1 and the water distributor 2 from inside the casing 4, the hydraulic mechanism 13 reversely pumps out the hydraulic oil in the inner cavity 111, the packing rubber cylinder 11 starts to reset by its own elastic force, and then the injector and the water distributor 2 are driven by an external driving mechanism to move inside the casing 4;

[0035] Secondly, in the above process, after the hydraulic mechanism 13 stops injecting hydraulic oil into the inner cavity 111, the pressure in the inner cavity 111 remains constant. At this time, the size of the space of the inner cavity 111 includes the space of part of the receiving groove 124 vacated due to the movement of the piston plate 122. At this time, the spring 123 is in a contracted state. Therefore, at this time, the adjusting mechanism 12 is equivalent to a compensation mechanism. When the plugging device 1 undergoes a downward displacement under the action of the temperature, pressure and fluid impact inside the casing 4, when the packing rubber cylinder 11 on the plugging device 1 moves to the part of the casing 4 with a pit (the inner part of the casing 4 will have pits due to chemical corrosion, and the hard particles (such as quartz sand) in the high-speed flowing sand-carrying fluid or fracturing fluid inside it impact the inner wall of the casing 4, which will also cause "erosion pits"), it causes part of the packing rubber cylinder 11 at this time not to be in complete contact with the inner wall of the casing 4, that is, the packing rubber cylinder 11 at this time still has deformable space. Subsequently, the spring 123 will start to contract and push the piston plate 122 to move in the receiving groove 124, that is, push the hydraulic oil in the receiving groove 124 back into the inner cavity 111, increasing the pressure in the inner cavity 111 and driving the packing rubber cylinder 11 to deform again and fit on the inner wall of the moved casing 4, avoiding the decrease in the contact pressure between the moved packing rubber cylinder 11 and the inner wall of the casing 4.

[0036] Therefore, the adjusting mechanism 12 can not only make the worn sealing rubber cylinder 11 fit tightly against the inner wall of the casing 4. In this embodiment, the adjusting mechanism 12 also acts as a dynamic compensation mechanism. After the plug 1 is displaced, the adjusting mechanism 12 can supplement the pressure in the inner cavity 111 according to different environments, prompting the sealing rubber cylinder 11 to stretch further to adapt to different usage environments.

[0037] It should be added that in this embodiment, the reason why the sealing rubber cylinder 11 cannot be stretched further is not that it has reached its limit state by itself, but that it is blocked by the inner wall of the casing 4 and cannot be stretched radially any further. Therefore, after the sealing rubber cylinder 11 reaches this state, injecting hydraulic oil into the inner cavity 111 will not damage the sealing rubber cylinder 11, but only increase the contact pressure between the sealing rubber cylinder 11 and the inner wall of the casing 4.

[0038] In another embodiment of the present invention, a support mechanism 18 is also installed in the inner cavity 111. The support mechanism 18 is connected to the piston plate 122 and is used to extrude the sealing rubber cylinder 11 against the inner wall of the casing 4 from the inside after the sealing rubber cylinder 11 is radially stretched.

[0039] Specifically, the support mechanism 18 includes a first connecting rod 181, a wedge block 182, a second connecting rod 184, and a support block 185. One end of the first connecting rod 181 is connected to the outer wall of the piston plate 122, and the other end is connected to the inner wall of the rubber cylinder pressing ring 16. The two ends of the second connecting rod 184 are respectively connected to two groups of rubber cylinder pressing rings 16. The first connecting rod 181 is located on the side of the second connecting rod 184 closer to the central axis of the sealing rubber cylinder 11. The wedge block 182 is installed on the first connecting rod 181. A hole is provided on the second connecting rod 184, and the support block 185 is located in the hole and forms a sliding guiding fit with the hole. The length direction of the support block 185 is the same as the radial direction of the sealing rubber cylinder 11. The lower end surface of the support block 185 is an inclined surface, and the support block 185 forms a wedge-shaped fit with the wedge block 182. The wedge block 182 has a right trapezoidal structure. A convex block is provided on the outer wall of the lower end of the support block 185, and a spring 123 is also installed between the convex block and the second connecting rod 184. The stiffness of this spring 123 is relatively low and can be easily contracted and stretched. One end of the first connecting rod 181 away from the piston plate 122 is provided with a telescopic section 183. The telescopic section 183 divides the first connecting rod 181 into two sections. The telescopic section 183 is the sleeve rod between the two sections of the first connecting rod 181. One end of the sleeve rod is fixedly connected to one section of the first connecting rod 181 close to the piston plate 122, and the other end extends into the other section of the first connecting rod 181 and is slidably connected to this section of the first connecting rod 181. This socket-type telescopic section 183 is a prior art and will not be elaborated. In this embodiment, multiple groups of support mechanisms 18 are provided and are all connected to the piston plate 122. The multiple groups of support mechanisms 18 are evenly distributed at equal intervals in a circular shape around the central axis of the sealing rubber cylinder 11;

[0040] During actual use, after the packer rubber cylinder 11 cannot be radially stretched, the piston plate 122 moves towards the side away from the inner cavity 111 in the receiving groove 124. The movement of the piston plate 122 drives the first connecting rod 181 to be stretched synchronously, that is, the telescopic section 183 on the first connecting rod 181 starts to be stretched. At this time, during the movement of the wedge block 182 on the first connecting rod 181, the wedge block 182 contacts the bottom of the support block 185. Due to the wedge-shaped fit between the support block 185 and the wedge block 182, the wedge block 182 drives the support block 185 to move radially in the inner cavity 111 during movement. With the contact between the piston plate 122 and the trigger member 125, one end of the support block 185 away from the wedge block 182 abuts against the inner wall of the packer rubber cylinder 11, and the other end abuts against the side surface of the wedge block 182 close to the support block 185, and supports the support block 185 through this side surface. At the same time, the spring 123 between the support block 185 and the second connecting rod 184 starts to contract. Through the radial movement of the support block 185, the packer rubber cylinder 11 is supported from the inside, and the contact pressure between the packer rubber cylinder 11 and the inner wall of the casing 4 is increased. Finally, when the piston plate 122 resets, the packer rubber cylinder 11 resets and contracts, and at the same time, the wedge block 182 gradually disengages from the contact with the support block 185, and the spring 123 between the support block 185 and the second connecting rod 184 starts to reset and stretch, driving the support block 185 to reset synchronously;

[0041] In order to avoid the situation that the packer rubber cylinder 11 adheres to the inner wall of the casing 4 during stretching and is torn when the packer rubber cylinder 11 resets due to reasons such as heat generation caused by fluid friction, heat release from chemical reactions, and external injected heat flow, in this embodiment, furthermore, as Figure 2 shown, a plurality of wedge blocks 182 are provided on the first connecting rod 181, and the plurality of wedge blocks 182 are equidistantly distributed along the length direction of the first connecting rod 181. Each wedge block 182 corresponds to a support block 185, and the distances between the plurality of wedge blocks 182 and the corresponding support blocks 185 decrease in sequence along the length direction of the first connecting rod 181. For example Figure 2As shown in the figure, there are three wedge blocks 182. When the piston plate 122 is in the initial state, the distances between the wedge blocks 182 on the first connecting rod 181 and the corresponding support blocks 185 decrease sequentially from right to left. By setting the distances, when the piston plate 122 moves toward the side away from the inner cavity 111, the three wedge blocks 182 will sequentially drive the support blocks 185 to rise. Similarly, when the piston plate 122 moves back to its original position, the support blocks 185 will also return to their original positions sequentially. That is, in this embodiment, the leftmost wedge block 182 first drives the corresponding support block 185 to support against the inner wall of the packer rubber cylinder 11, and the rightmost wedge block 182 finally drives the corresponding support block 185 to support against the inner wall of the packer rubber cylinder 11. That is, when the piston plate 122 returns to its original position, the rightmost wedge block 182 will also first disengage from the corresponding support block 185, that is, the support block 185 first returns to its original position and disengages from the support of the packer rubber cylinder 11. At this time, the left inner wall of the packer rubber cylinder 11 is still supported by the support block 185, and the right end starts to return to its original position after losing the support of the corresponding support block 185. As the piston plate 122 gradually completes its return to its original position, the wedge blocks 182 on the second connecting rod 184 will also return to their original positions and disengage from the support of the packer rubber cylinder 11 sequentially from right to left, that is, the whole packer rubber cylinder 11 returns to its original position sequentially from right to left, indirectly realizing an action similar to slow peeling to reduce the situation where the whole packer rubber cylinder 11 is torn when it adheres to the inner wall of the casing 4 and returns to its original position.

[0042] Only some exemplary embodiments of the present invention have been described by way of illustration. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of the claims of the present invention.

Claims

1. An electric packer and water blending integrated working barrel is arranged inside a casing, and is characterized in that It includes a plugging device and a water distributor. The plugging device is connected to the water distributor through an intermediate connecting pipe. The plugging device includes a sealing rubber cylinder and a hydraulic mechanism. The hydraulic mechanism is used to inject hydraulic oil into the inner cavity inside the sealing rubber cylinder. An adjusting mechanism is also installed in the inner cavity. When the sealing rubber cylinder fits against the inner wall of the casing, the adjusting mechanism drives the hydraulic mechanism to close. Rubber cylinder pressing rings are provided at both ends of the sealing rubber cylinder. A limiting groove is formed inside the rubber cylinder pressing ring. The limiting groove is in a ring structure. Both ends of the sealing rubber cylinder are clamped and limited in the limiting groove. Central flow-through pipes are installed at the central positions of the plugging device and the water distributor. Flow-through channels are formed inside both groups of central flow-through pipes. A docking flow-through pipe is installed inside the intermediate connecting pipe. The two groups of central flow-through pipes are connected to each other through the docking flow-through pipe. The adjusting mechanism includes an engagement ring and a piston plate. The engagement ring is sleeved on the central flow-through pipe inside the plugging device. An accommodation groove is formed between the engagement ring and the central flow-through pipe. The piston plate is installed inside the accommodation groove and is movably sealed to connect the inner wall of the engagement ring and the outer wall of the central flow-through pipe. A spring and a trigger member are also installed inside the accommodation groove. The trigger member is connected to the inner wall of the engagement ring. One end of the spring is connected to the engagement ring, and the other end is connected to the piston plate.

2. The integrated working barrel for electric packer and water blending according to claim 1, characterized in that, An upper joint is installed at one end of the plugging device facing away from the water distributor, and a lower joint is installed at one end of the water distributor facing away from the plugging device.

3. The integrated working barrel for electric packer and water blending according to claim 1, characterized in that, The plugging device is electrically connected to the water distributor, and cable connectors are provided at the ends of the plugging device and the water distributor that are far away from each other. The cable connectors are used to connect external wire bodies.

4. The one-piece electric packer and water distribution working barrel according to claim 1, wherein, The space enclosed by the outer wall of the central flow-through pipe inside the plugging device, the inner wall of the sealing rubber cylinder, and the inner wall of the rubber cylinder pressing ring is the inner cavity.

5. An integrated electric packer and water dispensing working barrel according to claim 4, characterized in that, A support mechanism is also installed in the inner cavity. The support mechanism is connected to the piston plate and is used to squeeze the sealing rubber cylinder against the inner wall of the casing from the inside after the sealing rubber cylinder is radially stretched.

6. The integrated electric packer and water blending working barrel according to claim 5, characterized in that, The support mechanism includes a first connecting rod, a wedge block, a second connecting rod, and a support block. One end of the first connecting rod is connected to the outer wall of the piston plate, and the other end is connected to the inner wall of the rubber cylinder pressing ring. Both ends of the second connecting rod are respectively connected to the two groups of rubber cylinder pressing rings. The first connecting rod is located on the side of the second connecting rod close to the central axis of the sealing rubber cylinder. The wedge block is installed on the first connecting rod. A hole is formed in the second connecting rod. The support block is located inside the hole and forms a sliding guiding fit with the hole. The lower end surface of the support block is an inclined surface. The support block and the wedge block form a wedge fit. The wedge block is in a right trapezoidal structure. An expansion section is provided at the end of the first connecting rod facing away from the piston plate.

7. An integrated working barrel for electric packer and water blending, according to claim 5, characterized in that, Multiple groups of support mechanisms are provided and are all connected to the piston plate. The multiple groups of support mechanisms are evenly distributed at equal distances in a circle around the central axis of the sealing rubber cylinder.

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