A double-stage sealed injection-production packer

Abstract

The present invention relates to the technical field of in-well injection and production equipment, and specifically provides a double-stage sealed injection and production packer, which includes: an injection and production part, a first sealing part, an anchoring part, a second sealing part, and a blocking part that are sequentially sleeved and slid on the outer periphery of the injection and production part; the first sealing part can slide and extrude the upper sealing rubber cylinder; the second sealing part can slide and extrude the lower sealing rubber cylinder; one end of the anchoring part is connected to the first sealing part; one side of the blocking part is clamped with the injection and production part through a first locking ring; an unlocking protrusion is arranged on the first locking ring; an unlocking groove is arranged on the locking cylinder; when the unlocking protrusion is aligned with the unlocking groove, the unlocking protrusion is embedded in the unlocking groove. Through the double-stage sealing arrangement formed by the first sealing part and the second sealing part, the sealing effect is improved, and the probability of sealing problems is reduced. Moreover, by moving the locking cylinder, the clamping of the locking ring can be released, so as to release the extrusion force for unsealing, improve the unsealing efficiency, facilitate replacement and maintenance, and avoid affecting the normal operation of the air energy storage system.

Description

Technical Field

[0001] The present invention belongs to the technical field of in-well injection and production equipment, and particularly relates to a double-stage sealed injection and production packer. Background Art

[0002] Compressed air energy storage belongs to the direct application of large-scale energy storage power generation technology. In an air energy storage system, an injection and production packer is mainly used to store compressed air in the ground or an underground gas storage reservoir, and to control and regulate it when air energy storage needs to be released. It is one of the key components in the injection and production process of compressed air.

[0003] The air energy storage system needs to be maintained for a long time. Therefore, the existing injection and production packers also need to maintain their operating state for a long time, and during this period, injection and production need to be rotated daily according to the high and low peaks of electricity to achieve energy storage and release. However, the existing injection and production packers generally have a single-seal structure. Over time, it is difficult to effectively maintain the sealing effect of the injection and production packers for a long time, and it cannot match the maintenance time of the air energy storage system. At the same time, even if there is a problem with the sealing effect of the injection and production packer, generally, there will still be some sealing effect. Because there is no special unsealing mechanism on the injection and production packer, it is difficult to quickly remove and replace the injection and production packer with a problem in the sealing effect, which affects the normal operation of the air energy storage system.

[0004] Therefore, the sealing effect of the existing injection and production packers is prone to problems, and it is difficult to quickly unseal and complete replacement and repair. Summary of the Invention

[0005] In view of the above problems, the present invention provides a double-stage sealed injection and production packer, including:

[0006] An injection and production part, arranged along the axial direction of the casing, with an injection and production channel opened therein. A first sealing part, an anchoring part, a second sealing part, and a blocking part are sequentially sleeved on the outer periphery of the injection and production part in a sliding manner;

[0007] One end of the first sealing part is provided with an upper sealing rubber cylinder in a butt-jointed manner, and one side is communicated with the injection and production channel. The first sealing part is driven by hydraulic pressure to slide and squeeze the upper sealing rubber cylinder;

[0008] One end of the second sealing part is provided with a lower sealing rubber cylinder in a butt-jointed manner, and one side is communicated with the injection and production channel. The second sealing part is driven by hydraulic pressure to slide and squeeze the lower sealing rubber cylinder;

[0009] The anchoring part is provided with slips, and one end is connected to the end of the first sealing part away from the upper sealing rubber cylinder;

[0010] A blocking cavity is arranged between one side of the blocking part and the injection and production part;

[0011] A first locking ring is arranged in the blocking cavity. One side of the first locking ring is clamped with the injection and production part, and a plurality of unlocking protrusions are arranged on the other side of the first locking ring;

[0012] A lock cylinder is also slidably arranged in the blocking cavity. A plurality of unlocking grooves are arranged on one side of the lock cylinder, and the plurality of unlocking protrusions correspond to the plurality of unlocking grooves one by one;

[0013] When the unlocking protrusions and the unlocking grooves are arranged opposite to each other, the first locking ring drives the unlocking protrusions to be embedded in the unlocking grooves.

[0014] In some specific embodiments, the injection and production part includes:

[0015] An upper pipe body, and a first sealing part is slidably sleeved on the outer periphery of the upper pipe body;

[0016] A first convex block is arranged on the outer periphery of the upper pipe body, and one end of the first convex block abuts against one end of the upper sealing rubber cylinder away from the first sealing part;

[0017] A lower pipe body, the top end of the lower pipe body is connected to the bottom end of the upper pipe body, and a second sealing part is slidably sleeved on the outer periphery of the lower pipe body;

[0018] A second convex block is arranged on the outer periphery of the lower pipe body, and one end of the second convex block abuts against one end of the lower sealing rubber cylinder away from the second sealing part.

[0019] In some specific embodiments, the first sealing part includes:

[0020] A first cylinder sleeve, slidably sleeved on the outer periphery of the upper pipe body, and one end of it is connected to one end of the anchoring part;

[0021] An upper rubber cylinder seat, slidably sleeved on the outer periphery of the upper pipe body, one end of it is connected to the end of the first cylinder sleeve away from the anchoring part, and the other end abuts against one end of the upper sealing rubber cylinder away from the first convex block;

[0022] The inner wall of the first cylinder sleeve, the inner wall of the upper rubber cylinder seat and the outer wall of the upper pipe body enclose an upper piston cavity, and the upper piston cavity is communicated with the injection and production channel;

[0023] An upper piston cylinder, arranged in the upper piston cavity and clamped with the upper rubber cylinder seat.

[0024] In some specific embodiments, the anchoring part includes:

[0025] A first pushing ring, slidably sleeved on the outer periphery of the upper pipe body, and one end of it is connected to the first sealing part away from the upper sealing rubber cylinder connection;

[0026] The second pushing ring is slidably sleeved on the outer periphery of the upper pipe body opposite to the first pushing ring;

[0027] The slips are arranged between the first pushing ring and the first pushing ring.

[0028] In some specific embodiments, one end of the second bump extends along the axial direction of the upper pipe body towards the second pushing ring and is connected to the end of the second pushing ring away from the slips.

[0029] In some specific embodiments, the outer side of the end of the first pushing ring close to the slips is successively provided with a first upper conical surface, a second upper conical surface and a third upper conical surface from top to bottom;

[0030] The inner side of the end of the slips close to the first pushing ring is successively provided with a first auxiliary upper conical surface, a second auxiliary upper conical surface and a third auxiliary upper conical surface from top to bottom;

[0031] The first upper conical surface, the second upper conical surface and the third upper conical surface are respectively and correspondingly fitted with the first auxiliary upper conical surface, the second auxiliary upper conical surface and the third auxiliary upper conical surface;

[0032] The outer side of the end of the second pushing ring close to the slips is successively provided with a first lower conical surface, a second lower conical surface and a third lower conical surface from bottom to top;

[0033] The inner side of the end of the slips close to the second pushing ring is successively provided with a first auxiliary lower conical surface, a second auxiliary lower conical surface and a third auxiliary lower conical surface from bottom to top;

[0034] The first lower conical surface, the second lower conical surface and the third lower conical surface are respectively and correspondingly fitted with the first auxiliary lower conical surface, the second auxiliary lower conical surface and the third auxiliary lower conical surface.

[0035] In some specific embodiments, the second sealing part includes:

[0036] A second cylinder sleeve is slidably sleeved on the outer periphery of the lower pipe body, and one end thereof is connected to one end of the blocking part;

[0037] A lower rubber cylinder seat is slidably sleeved on the outer periphery of the lower pipe body, one end thereof is connected to the end of the second cylinder sleeve away from the blocking part, and the other end thereof abuts against the end of the upper sealing rubber cylinder away from the second bump;

[0038] The inner wall of the second cylinder sleeve, the inner wall of the lower rubber cylinder seat and the outer wall of the lower pipe body enclose a lower piston cavity, and the lower piston cavity is communicated with the injection-production channel;

[0039] A lower piston cylinder is arranged in the lower piston cavity and is clamped with the lower rubber cylinder seat.

[0040] In some specific embodiments, the blocking portion includes:

[0041] A third cylinder liner, which is slidably sleeved on the outer periphery of the lower pipe body, and one end thereof is connected to one end of the second sealing portion away from the lower sealing rubber cylinder;

[0042] The inner wall of one end of the third cylinder liner close to the second sealing portion and the outer wall of the bottom end of the lower pipe body enclose the blocking cavity;

[0043] The locking cylinder is slidably inserted into the blocking cavity, and one end of the locking cylinder away from the blocking cavity is exposed in the injection-production channel;

[0044] A plurality of unlocking grooves are uniformly arranged on the inner wall of one end of the locking cylinder inserted into the blocking cavity.

[0045] In some specific embodiments, one end of the second sealing portion away from the lower sealing rubber cylinder extends along the axial direction of the blocking cavity and is inserted into the blocking cavity;

[0046] A retaining step is arranged on the outer wall of the end of the second sealing portion inserted into the blocking cavity, and a hook claw is arranged on the inner wall of the end of the locking cylinder inserted into the blocking cavity, and the retaining step and the hook claw are mutually adapted.

[0047] In some specific embodiments, a connecting ring is arranged at one end of the third cylinder liner away from the second sealing portion;

[0048] One end of the connecting ring extends along the axial direction of the locking cylinder towards the direction close to the locking cylinder and abuts against one end of the locking cylinder away from the blocking cavity.

[0049] The double-stage sealing injection-production packer of the present invention can, through the anchoring part connected to the first sealing part, expand the slips away from the injection-production part and contact the inner wall of the casing under the action of the hydraulic pressure in the injection-production channel, thereby realizing setting. At the same time, through the first sealing part and the second sealing part sleeved on the injection-production part in a sliding manner, the upper sealing rubber cylinder and the lower sealing rubber cylinder can be respectively extruded under the action of the hydraulic pressure in the injection-production channel, so that the upper sealing rubber cylinder and the lower sealing rubber cylinder expand away from the injection-production part and abut against the inner wall of the casing, thereby performing double-stage sealing setting, improving the sealing effect and reducing the probability of sealing problems. Moreover, the blocking part is clamped with the injection-production part through the first locking ring in the blocking cavity. When the locking cylinder in the blocking cavity is driven to slide until the unlocking protrusion of the first locking ring is aligned with the unlocking groove of the locking cylinder, the first locking ring can drive the unlocking protrusion to be embedded in the unlocking groove under its own elastic action, causing the first locking ring to complete expansion, and then releasing the clamping connection between the first locking ring and the injection-production part, enabling the injection-production part to slide relative to the first sealing part, the second sealing part and the anchoring part, thereby releasing the extrusion forces on the upper sealing rubber cylinder, the lower sealing rubber cylinder and the slips, realizing the releasing operation, improving the releasing efficiency, being able to quickly complete the releasing, facilitating replacement and repair, and avoiding affecting the normal operation of the air energy storage system.

[0050] Other features and advantages of the present invention will be described in the following description of the specification, and in part, will be obvious from the description of the specification, or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures pointed out in the specification and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0052] Figure 1 It shows a schematic diagram of the double-stage sealing injection-production packer in the embodiment of the present invention;

[0053] Figure 2 It shows a partial upper-section schematic diagram of the double-stage sealing injection-production packer in the embodiment of the present invention;

[0054] Figure 3 It shows a partial middle-section schematic diagram of the double-stage sealing injection-production packer in the embodiment of the present invention;

[0055] Figure 4 It shows a partial lower-section schematic diagram of the double-stage sealing injection-production packer in the embodiment of the present invention;

[0056] Figure 5 The partial schematic diagram of the bottom end of the double-stage sealed injection-production packer in the embodiment of the present invention is shown;

[0057] Figure 6 The schematic diagram of the first push ring in the embodiment of the present invention is shown;

[0058] Figure 7 The schematic diagram of the second push ring in the embodiment of the present invention is shown;

[0059] Figure 8 The schematic diagram of the slips in the embodiment of the present invention is shown;

[0060] Figure 9 is Figure 2 the cross-sectional schematic diagram of A-A in

[0061] Figure 10 is Figure 3 the cross-sectional schematic diagram of B-B in

[0062] Figure 11 is Figure 5 the cross-sectional schematic diagram of C-C in

[0063] In the figure, 100, injection-production part; 110, upper pipe body; 111, first protrusion; 120, lower pipe body; 121, second protrusion; 200, first sealing part; 210, first cylinder sleeve; 211, first pin; 220, upper rubber cylinder seat; 221, second pin; 230, upper piston cylinder; 240, upper guide key; 250, upper locking ring assembly; 251, second locking ring; 252, first limit key; 300, anchoring part; 310, first push ring; 311, third pin; 312, first upper conical surface; 313, second upper conical surface; 314, third upper conical surface; 320, second push ring; 321, fourth pin; 322, first lower conical surface; 323, second lower conical surface; 324, third lower conical surface; 330, slips; 331, first auxiliary lower conical surface; 332, second auxiliary lower conical surface; 333, third auxiliary lower conical surface; 340, third locking ring; 350, long key; 400, second sealing part; 410, second cylinder sleeve; 411, anti-back step; 412, guide post; 420, lower rubber cylinder seat; 421, fifth pin; 430, lower piston cylinder; 440, lower guide key; 450, lower locking ring assembly; 451, fourth locking ring; 452, second limit key; 500, blocking part; 510, third cylinder sleeve; 520, first locking ring; 521, unlocking protrusion; 530, locking cylinder; 531, unlocking groove; 532, hook claw; 540, connecting ring; 600, collar; 700, lower joint; 800, upper sealing rubber cylinder; 900, lower sealing rubber cylinder. Detailed implementation manners

[0064] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0065] Referring to Figure 1 , the present invention provides a double-stage sealed injection-production packer, including: an injection-production part 100, a first sealing part 200, a second sealing part 400, an anchoring part 300, and a blocking part 500. The injection-production part 100 is arranged along the axial direction of the casing, and an injection-production channel is formed in the injection-production part 100. The first sealing part 200 is slidably sleeved on the upper part of the injection-production part 100. An upper sealing rubber cylinder 800 is arranged at one end of the first sealing part 200 in a butt-joint manner, and one side of the first sealing part 200 is communicated with the injection-production channel. The hydraulic pressure in the injection-production channel can drive the first sealing part 200 to squeeze the upper sealing rubber cylinder 800. The second sealing part 400 is slidably sleeved on the lower part of the injection-production part 100. A lower sealing rubber cylinder 900 is arranged at one end of the second sealing part 400 in a butt-joint manner, and one side of the second sealing part 400 is communicated with the injection-production channel. The hydraulic pressure in the injection-production channel can drive the second sealing part 400 to squeeze the lower sealing rubber cylinder 900. The anchoring part 300 is slidably sleeved on the middle part of the injection-production part 100. A slip 330 is arranged on the anchoring part 300, and one end of the anchoring part 300 is connected to the end of the first sealing part 200 far from the upper sealing rubber cylinder 800. The hydraulic pressure in the injection-production channel can also drive the first sealing part 200 to squeeze the slip 330 of the anchoring part 300. The blocking part 500 is sleeved on the bottom of the injection-production part 100, and a blocking cavity is arranged between one side of the blocking part 500 and the injection-production part 100. A first locking ring 520 is arranged in the blocking cavity. One side of the first locking ring 520 is clamped with the injection-production part 100, and a plurality of unlocking protrusions 521 are arranged on the other side of the first locking ring 520. A locking cylinder 530 is also slidably arranged in the blocking cavity. A plurality of unlocking grooves 531 are arranged on one side of the locking cylinder 530, and the plurality of unlocking protrusions 521 correspond to the plurality of unlocking grooves 531 one by one. When the unlocking protrusions 521 and the unlocking grooves 531 are arranged opposite to each other, the first locking ring 520 can expand in a direction away from the injection-production part 100, so that the first locking ring 520 drives the unlocking protrusions 521 to be embedded in the unlocking grooves 531.

[0066] Specifically, first, the first sealing portion 200, the anchoring portion 300, the second sealing portion 400, and the blocking portion 500 are coaxially sleeved on the outer periphery of the injection-production portion 100 in sequence from top to bottom along the axial direction of the injection-production portion 100. Among them, the first sealing portion 200, the second sealing portion 400, and the anchoring portion 300 are respectively slidably connected to the injection-production portion 100, while the blocking portion 500 is clamped to the injection-production portion 100 through the first locking ring 520, so that the relative positions between the blocking portion 500 and the injection-production portion 100 are fixed to each other, and the blocking portion 500 is supported below the first sealing portion 200, the anchoring portion 300, and the second sealing portion 400, so that the relative positions between the first sealing portion 200, the anchoring portion 300, the second sealing portion 400 and the injection-production portion 100 can also be fixed to each other.

[0067] Secondly, the upper sealing rubber cylinder 800 is coaxially and slidably sleeved on the outer periphery of the upper part of the injection-production portion 100 and is located between one end of the first sealing portion 200 away from the anchoring portion 300 and the injection-production portion 100. One side of the first sealing portion 200 close to the injection-production portion 100 is communicated with the injection-production channel of the injection-production portion 100, so that the hydraulic pressure input into the injection-production channel can enter the first sealing portion 200. The hydraulic pressure in the injection-production channel can drive one end of the first sealing portion 200 close to the upper sealing rubber cylinder 800 to abut against and squeeze the upper sealing rubber cylinder 800, thereby pushing the middle part of the upper sealing rubber cylinder 800 to expand and move in the direction away from the injection-production portion 100 until the middle part of the upper sealing rubber cylinder 800 abuts against the inner wall of the casing to achieve the first-stage sealing. The lower sealing rubber cylinder 900 is coaxially and slidably sleeved on the outer periphery of the lower part of the injection-production portion 100 and is located between one end of the second sealing portion 400 close to the anchoring portion 300 and the injection-production portion 100. One side of the second sealing portion 400 close to the injection-production portion 100 is communicated with the injection-production channel of the injection-production portion 100, so that the hydraulic pressure input into the injection-production channel can also enter the second sealing portion 400. The hydraulic pressure in the injection-production channel can drive one end of the second sealing portion 400 close to the anchoring portion 300 to abut against and squeeze the lower sealing rubber cylinder 900, thereby pushing the middle part of the lower sealing rubber cylinder 900 to expand and move in the direction away from the injection-production portion 100 until the middle part of the lower sealing rubber cylinder 900 abuts against the inner wall of the casing to achieve the second-stage sealing. Through the first sealing portion 200 and the second sealing portion 400 coaxially and slidably sleeved on the upper and lower parts of the injection-production portion 100, under the action of the hydraulic pressure in the injection-production channel, the upper sealing rubber cylinder 800 and the lower sealing rubber cylinder 900 can be respectively squeezed, so that the upper sealing rubber cylinder 800 and the lower sealing rubber cylinder 900 expand in the direction away from the injection-production portion 100 and abut against the inner wall of the casing, thereby performing a two-stage sealing setting, improving the sealing effect and reducing the probability of sealing problems.

[0068] Again, one end of the anchoring portion 300 away from the first sealing portion 200 is connected to the injection and production portion 100, and one end of the anchoring portion 300 close to the first sealing portion 200 is connected to the end away from the upper sealing rubber cylinder 800. Under the action of the hydraulic pressure in the injection and production channel, the hydraulic pressure in the injection and production channel can also drive the first sealing portion 200 to squeeze the anchoring portion 300, and then realize the extrusion of the slip 330 arranged on the anchoring portion 300. Under the action of the extrusion, the whole of the slip 330 can expand in the direction away from the injection and production portion 100 until the slip 330 abuts against the inner wall of the casing, so as to realize setting the packer.

[0069] Fourth, the blocking cavity is coaxially sleeved on the outer periphery of the bottom of the injection and production portion 100, and the side of the blocking portion 500 close to the injection and production portion 100 and the outer periphery of the injection and production portion 100 enclose the blocking cavity. The first locking ring 520 and the locking cylinder 530 are both arranged in the blocking cavity. The side of the first locking ring 520 away from the locking cylinder 530 is clamped with the outer peripheral surface of the injection and production portion 100. A plurality of unlocking protrusions 521 are uniformly arranged on the other side of the first locking ring 520, and a plurality of unlocking grooves 531 are uniformly arranged on the side of the locking cylinder 530 close to the first locking ring 520. The plurality of unlocking protrusions 521 correspond to the plurality of unlocking grooves 531 one by one, and the unlocking protrusions 521 and the unlocking grooves 531 of each corresponding group are arranged staggeredly. Moreover, the locking cylinder 530 is slidably arranged in the blocking cavity, so that the locking cylinder 530 can drive the unlocking grooves 531 to move until the unlocking grooves 531 are arranged opposite to each other. When the locking cylinder 530 drives the unlocking grooves 531 to be arranged staggeredly, the unlocking protrusions 521 of the first locking ring 520 can abut against the inner wall of the locking cylinder 530, so as to limit the first locking ring 520 and maintain the clamping connection between the first locking ring 520 and the injection and production portion 100.

[0070] Finally, when the lock cylinder 530 drives the unlocking groove 531 to move until the unlocking protrusion 521 and the unlocking groove 531 are oppositely arranged, the unlocking groove 531 can accommodate the unlocking protrusion 521. Under the action of the self-elastic force of the first locking ring 520, the first locking ring 520 can expand while driving the unlocking protrusion 521 to be embedded in the unlocking groove 531, so that the first locking ring 520 moves away from the injection-production part 100, the injection-production part 100 is disengaged from the clamping connection with the first locking ring 520, and the relative position between the injection-production part 100 and the blocking part 500 is no longer fixed to each other, that is, the relative positions among the injection-production part 100, the first sealing part 200, the anchoring part 300, and the second sealing part 400 can also be no longer fixed to each other. At this time, the injection-production part 100 can slide relative to the first sealing part 200, the second sealing part 400, and the anchoring part 300 by applying a pulling force, so as to relieve the extrusion force applied by the original hydraulic pressure on the upper sealing rubber cylinder 800, the lower sealing rubber cylinder 900, and the slip 330, facilitating the unsealing operation, improving the unsealing efficiency, enabling quick completion of unsealing, facilitating replacement and repair, and avoiding affecting the normal operation of the air energy storage system.

[0071] In some specific embodiments of the present invention, referring to Figure 2 , the injection-production part 100 includes: an upper pipe body 110 and a lower pipe body 120. The first sealing part 200 is sleeved on the upper part of the outer periphery of the upper pipe body 110. A first convex block is arranged on the upper part of the outer periphery of the upper pipe body 110, and one end of the first convex block abuts against one end of the upper sealing rubber cylinder 800 away from the first sealing part 200. The top of the lower pipe body 120 is connected to the bottom of the upper pipe body 110, and the second sealing part 400 is sleeved on the upper part of the outer periphery of the lower pipe body 120. A second convex block is arranged on the upper part of the outer periphery of the lower pipe body 120, and one end of the second convex block abuts against one end of the lower sealing rubber cylinder 900 away from the second sealing part 400.

[0072] Specifically, referring to Figure 1 , a coupling 600 is coaxially sleeved on the top end of the upper pipe body 110 for connecting to the ground equipment. Referring to Figure 4 , the top end of the lower pipe body 120 is coaxially sleeved on the bottom end of the upper pipe body 110. A first convex block is coaxially and fixedly sleeved on the outer periphery of the upper pipe body 110 near the coupling 600. One end of the first convex block near the first sealing part 200 abuts against one end of the upper sealing rubber cylinder 800 away from the first sealing part 200, so as to ensure that the first sealing part 200 can apply an extrusion force on the upper sealing rubber cylinder 800. A second convex block is coaxially and fixedly sleeved on the outer periphery of the lower pipe body 120 near the upper pipe body 110. One end of the second convex block near the second sealing part 400 abuts against one end of the lower sealing rubber cylinder 900 away from the second sealing part 400, so as to ensure that the second sealing part 400 can apply an extrusion force on the lower sealing rubber cylinder 900.

[0073] Further, a bending structure is provided at the top end of the lower tube body 120, so that the lower tube body 120 can be wrapped around the bottom end of the upper tube body 110 through this bending structure. That is, the inner diameter of the position of the lower tube body 120 where the bending structure is provided is adapted to the outer diameter of the upper tube body 110, and the outer diameter of the position of the lower tube body 120 where the bending structure is not provided is still the same as the outer diameter of the upper tube body 110, so as to facilitate the mutual adaptation between the first sealing portion 200 and the second sealing portion 400 and ensure effective sealing can be achieved through both the upper sealing rubber cylinder 800 and the lower sealing rubber cylinder 900.

[0074] In some specific embodiments of the present invention, referring to Figure 2 , the first sealing portion 200 includes: a first cylinder sleeve 210, an upper rubber cylinder seat 220, and an upper piston cylinder 230. The first cylinder sleeve 210 is slidably sleeved on the outer periphery of the upper tube body 110, and one end of the first cylinder sleeve 210 is connected to one end of the anchoring portion 300. The upper rubber cylinder seat 220 is slidably sleeved on the outer periphery of the upper tube body 110, and one end of the upper rubber cylinder seat 220 is connected to the end of the first cylinder sleeve 210 away from the anchoring portion 300, and the other end abuts against the end of the upper sealing rubber cylinder 800 away from the first convex block. The inner wall of the first cylinder sleeve 210, the inner wall of the upper rubber cylinder seat 220, and the outer wall of the upper tube body 110 enclose an upper piston cavity, and the upper piston cavity is communicated with the injection and production channel. The upper piston cylinder 230 is disposed in the upper piston cavity, and the upper piston cylinder 230 is clamped with the upper rubber cylinder seat 220.

[0075] Specifically, the first cylinder liner 210 is coaxially and slidably sleeved on the outer periphery of the upper pipe body 110, and one end of the first cylinder liner 210 away from the upper sealing rubber cylinder 800 is connected to the anchoring portion 300. The upper rubber cylinder seat 220 is coaxially and slidably sleeved on the outer periphery of the upper pipe body 110. One end of the upper rubber cylinder seat 220 away from the upper sealing rubber cylinder 800 is connected to one end of the first cylinder liner 210 close to the upper sealing rubber cylinder 800, and one end of the upper rubber cylinder seat 220 close to the upper sealing rubber cylinder 800 abuts against one end of the upper sealing rubber cylinder 800 away from the first bump. There is a gap between the inner wall of one end of the first cylinder liner 210 close to the upper sealing rubber cylinder 800 and the inner wall of one end of the upper rubber cylinder seat 220 away from the upper sealing rubber cylinder 800 and the outer wall of the upper pipe body 110. Thus, an upper piston cavity is formed by enclosing the inner wall of one end of the first cylinder liner 210 close to the upper sealing rubber cylinder 800, the inner wall of the upper rubber cylinder seat 220 away from the upper sealing rubber cylinder 800, and the outer wall of the upper pipe body 110. The upper piston cylinder 230 is slidably arranged in the upper piston cavity. Moreover, the outer wall of one end of the upper piston cylinder 230 close to the upper rubber cylinder seat 220 is threadedly connected to the inner wall of the upper rubber cylinder seat 220 away from the upper sealing rubber cylinder 800. Thus, the movement of the upper piston cylinder 230 can drive the upper rubber cylinder seat 220 to move together. Wherein, a first through hole is formed in the upper pipe body 110, and the injection-production channel is communicated with one end of the upper piston cavity away from the upper sealing rubber cylinder 800 through the first through hole. When the compressed air in the injection-production channel enters the upper piston cavity, the hydraulic pressure of the compressed air can drive the upper piston cylinder 230 to move along the axial direction of the upper pipe body 110 in the upper piston cavity towards the direction close to the upper sealing rubber cylinder 800, driving the upper rubber cylinder seat 220 to move together. Thus, the upper sealing rubber cylinder 800 can be pushed by the upper rubber cylinder seat 220 to apply an extrusion force to the upper sealing rubber cylinder 800, so as to realize the expansion of the upper sealing rubber cylinder 800. At the same time, when the compressed air in the injection-production channel enters the upper piston cavity, the hydraulic pressure of the compressed air can also drive the first cylinder liner 210 to move along the axial direction of the upper pipe body 110 towards the direction close to the anchoring portion 300, thus indirectly applying an extrusion force to the anchoring portion 300 to realize the expansion of the slip 330.

[0076] Further, one end of the upper rubber cylinder seat 220 away from the upper sealing rubber cylinder 800 is connected to one end of the first cylinder sleeve 210 close to the upper sealing rubber cylinder 800 through a first pin 211, and one end of the upper rubber cylinder seat 220 close to the upper sealing rubber cylinder 800 is connected to the outer wall of the upper pipe body 110 through a second pin 221. When compressed air enters the upper piston cavity, as the hydraulic pressure continuously increases, the first pin 211 will be cut off first, so that the hydraulic pressure of the compressed air can first drive the first cylinder sleeve 210 to move along the axial direction of the upper pipe body 110 towards the direction close to the anchoring part 300 to realize the expansion of the slip 330. As the hydraulic pressure further increases, the second pin 221 will be cut off, so that the hydraulic pressure of the compressed air can drive the upper piston cylinder 230 to move along the axial direction of the upper pipe body 110 in the upper piston cavity towards the direction close to the upper sealing rubber cylinder 800, driving the upper rubber cylinder seat 220 to move together to realize the expansion of the upper sealing rubber cylinder 800. Through this structural arrangement, setting can be carried out first and then sealing can be carried out, so that the setting effect and the sealing effect can be guaranteed.

[0077] Further, the inner wall of the upper piston cylinder 230 is slidably connected to the outer wall of the upper pipe body 110 through an upper guide key 240. The two ends of the upper guide key 240 are arranged along the axial direction of the upper pipe body 110, so as to limit the moving direction of the upper piston cylinder 230 and ensure the sealing effect of the upper sealing rubber cylinder 800.

[0078] Further, an upper locking ring assembly 250 is arranged between the outer wall of the upper piston cylinder 230 and the inner wall of one end of the first cylinder sleeve 210 close to the upper sealing rubber cylinder 800. The upper locking ring assembly 250 includes: a second locking ring 251 and a first limiting key 252. The inner wall of the second locking ring 251 is provided with a one-way thread, and the outer wall of the second locking ring 251 is provided with a reverse one-way thread. The outer wall of the upper piston cylinder 230 is provided with a one-way thread adapted to the one-way thread on the inner wall of the second locking ring 251, so that the inner wall of the second locking ring 251 is threadedly connected to the outer wall of the upper piston cylinder 230, thereby realizing one-way locking. The inner wall of the first cylinder sleeve 210 is provided with a reverse one-way thread adapted to the reverse one-way thread on the outer wall of the second locking ring 251, so that the outer wall of the second locking ring 251 is threadedly connected to the inner wall of the first cylinder sleeve 210, thereby realizing connection and fixation.

[0079] In some specific embodiments of the present invention, with reference to Figure 3 , the anchoring part 300 includes: a first pushing ring 310, a second pushing ring 320 and a slip 330. The first pushing ring 310 is slidably sleeved on the outer periphery of the upper pipe body 110, and one end of the first pushing ring 310 is connected to the first sealing part 200 away from the upper sealing rubber cylinder 800. The second pushing ring 320 is slidably sleeved on the outer periphery of the upper pipe body 110 opposite to the first pushing ring 310. The slip 330 is arranged between the first pushing ring 310 and the first pushing ring 310.

[0080] Specifically, the first pushing ring 310 is coaxially and slidably sleeved on the outer periphery of the upper pipe body 110. One end of the first pushing ring 310 close to the upper sealing rubber cylinder 800 is fixedly connected to one end of the first cylinder sleeve 210 far from the upper sealing rubber cylinder 800. The inner wall of one end of the first cylinder sleeve 210 far from the upper sealing rubber cylinder 800 is covered on the outer wall of one end of the first pushing ring 310 close to the upper sealing rubber cylinder 800. The second pushing ring 320 is symmetrically arranged with the first pushing ring 310. The second pushing ring 320 is coaxially and fixedly sleeved on the outer periphery of the upper pipe body 110. One end of the second pushing ring 320 close to the upper sealing rubber cylinder 800 is arranged opposite to the first pushing ring 310. And there is a gap between one end of the second pushing ring 320 close to the upper sealing rubber cylinder 800 and one end of the first pushing ring 310 far from the upper sealing rubber cylinder 800. The slip 330 is arranged between one end of the first pushing ring 310 far from the upper sealing rubber cylinder 800 and one end of the second pushing ring 320 close to the upper sealing rubber cylinder 800. When the first cylinder sleeve 210 moves along the axial direction of the upper pipe body 110 towards the direction close to the anchoring part 300, it will drive the first pushing ring 310 to move along the axial direction of the upper pipe body 110 towards the direction close to the second pushing ring 320. Thus, the slip 330 can be squeezed through the mutual cooperation of the first pushing ring 310 and the second pushing ring 320, and thus the expansion and setting of the slip 330 can be realized.

[0081] Further, one end of the first pushing ring 310 close to the slip 330 and one end of the slip 330 close to the first pushing ring 310 are connected by a third pin 311. One end of the second pushing ring 320 close to the slip 330 and one end of the slip 330 close to the second pushing ring 320 are connected by a fourth pin 321. When the first cylinder sleeve 210 pushes the first pushing ring 310 to move towards the direction close to the slip 330, the fourth pin 321 is first cut off, so that one end of the second pushing ring 320 pushing the slip 330 close to the second pushing ring 320 expands. Continuing to apply pressure, the third pin 311 will be cut off, so that one end of the first pushing ring 310 pushing the slip 330 close to the first pushing ring 310 expands, and then the overall expansion of the slip 330 is realized, and the setting in the casing is realized.

[0082] Further, a plurality of long keys 350 are arranged between the inner wall of the second pushing ring 320 and the outer wall of the upper pipe body 110. The two ends of the long key 350 are arranged along the axial direction of the upper pipe body 110 and are respectively fitted and connected with the inner wall of the second pushing ring 320 and the outer wall of the upper pipe body 110. The long key 350 can play a role in limiting and anti-rotation for the second pushing ring 320, and thus can also play a role in limiting and anti-rotation when the slip 330 expands.

[0083] Further, an upper third locking ring 340 is disposed between the outer wall of the upper tube body 110 and the inner wall of one end of the first pushing ring 310 close to the first cylinder sleeve 210. The inner wall of the third locking ring 340 is provided with a one-way thread, and the outer wall of the third locking ring 340 is provided with a reverse one-way thread. The outer wall of the upper tube body 110 is provided with a one-way thread adapted to the one-way thread on the inner wall of the third locking ring 340, so that the inner wall of the third locking ring 340 is threadedly connected to the outer wall of the upper tube body 110, thereby realizing one-way locking. The inner wall of the first pushing ring 310 is provided with a reverse one-way thread adapted to the reverse one-way thread on the outer wall of the third locking ring 340, so that the outer wall of the third locking ring 340 is threadedly connected to the inner wall of the first pushing ring 310, thereby realizing connection and fixation.

[0084] It should be noted that the slips 330 are existing elastic elements. Under the extrusion action, the slips 330 can realize elastic expansion in diameter, and then gradually contact with the inner wall of the casing, so that the teeth of the slips 330 are anchored on the inner wall of the casing.

[0085] In some specific embodiments of the present invention, referring to Figure 3 , one end of the second convex block extends along the axial direction of the upper tube body 110 towards the second pushing ring 320 and is connected to one end of the second pushing ring 320 away from the slips 330.

[0086] Specifically, the whole of the second convex block is also a bent structure, so that one end of the second convex block close to the lower sealing rubber cylinder 900 can be sleeved on the outer periphery of the position of the lower tube body 120 without the bent structure, so as to facilitate abutting against the lower sealing rubber cylinder 900, and one end of the second convex block away from the lower sealing rubber cylinder 900 can pass through the bent structure of the lower tube body 120 and extend along the axial direction of the upper tube body 110 towards the second pushing ring 320 until one end of the second convex block away from the lower sealing rubber cylinder 900 is connected to one end of the second pushing ring 320 away from the slips 330, so that the second convex block can support under the second pushing ring 320, and the relative position of the second pushing ring 320 with respect to the upper tube body 110 is fixed, which is convenient for cooperating with the first pushing ring 310 to squeeze the slips 330.

[0087] In some specific embodiments of the present invention, referring to Figure 6 , the outer side of one end of the first pushing ring 310 close to the slips 330 is sequentially provided with a first upper conical surface 312, a second upper conical surface 313 and a third upper conical surface 314 from top to bottom. Referring to Figure 8 , the inner side of one end of the slips 330 close to the first pushing ring 310 is sequentially provided with a first auxiliary upper conical surface, a second auxiliary upper conical surface and a third auxiliary upper conical surface from top to bottom. The first upper conical surface 312, the second upper conical surface 313 and the third upper conical surface 314 are in one-to-one correspondence and fit with the first auxiliary upper conical surface, the second auxiliary upper conical surface and the third auxiliary upper conical surface. Referring to Figure 7, on the outer side of one end of the second pushing ring 320 close to the slips 330, a first lower conical surface 322, a second lower conical surface 323 and a third lower conical surface 324 are sequentially arranged from bottom to top. On the inner side of one end of the slips 330 close to the second pushing ring 320, a first auxiliary lower conical surface 331, a second auxiliary lower conical surface 332 and a third auxiliary lower conical surface 333 are sequentially arranged from bottom to top. The first lower conical surface 322, the second lower conical surface 323 and the third lower conical surface 324 are in one-to-one correspondence and fit with the first auxiliary lower conical surface 331, the second auxiliary lower conical surface 332 and the third auxiliary lower conical surface 333.

[0088] Specifically, when the first cylinder liner 210 pushes the first pushing ring 310 to move towards the slips 330, the fourth pin 321 is first sheared off. The first auxiliary lower conical surface 331, the second auxiliary lower conical surface 332 and the third auxiliary lower conical surface 333 of the slips 330 are sequentially in contact with the first lower conical surface 322, the second lower conical surface 323 and the third lower conical surface 324 of the second pushing ring 320, thereby pushing one end of the slips 330 close to the second pushing ring 320 to expand. By continuously applying pressure, the third pin 311 will be sheared off. The first auxiliary upper conical surface, the second auxiliary upper conical surface and the third auxiliary upper conical surface of the slips 330 are sequentially in contact with the first upper conical surface 312, the second upper conical surface 313 and the third upper conical surface 314 of the first pushing ring 310, thereby pushing one end of the slips 330 close to the first pushing ring 310 to expand, and further realizing the overall expansion of the slips 330 and achieving setting in the casing.

[0089] It should be noted that the first upper conical surface 312, the second upper conical surface 313 and the third upper conical surface 314 of the first pushing ring 310 have the same structure as the first lower conical surface 322, the second lower conical surface 323 and the third lower conical surface 324 of the second pushing ring 320. The first auxiliary upper conical surface, the second auxiliary upper conical surface and the third auxiliary upper conical surface of the slips 330 have the same structure as the first auxiliary lower conical surface 331, the second auxiliary lower conical surface 332 and the third auxiliary lower conical surface 333, only the setting directions are opposite.

[0090] In some specific embodiments of the present invention, referring to Figure 4 , the second sealing part 400 includes: a second cylinder liner 410, a lower rubber cylinder seat 420 and a lower piston cylinder 430. The second cylinder liner 410 is slidably sleeved on the outer periphery of the lower pipe body 120, and one end of the second cylinder liner 410 is connected to one end of the blocking part 500. The lower rubber cylinder seat 420 is slidably sleeved on the outer periphery of the lower pipe body 120, and one end of the lower rubber cylinder seat 420 is connected to the end of the second cylinder liner 410 far from the blocking part 500, and the other end abuts against the end of the upper sealing rubber cylinder 800 far from the second convex block. The inner wall of the second cylinder liner 410, the inner wall of the lower rubber cylinder seat 420 and the outer wall of the lower pipe body 120 enclose a lower piston cavity, and the lower piston cavity is communicated with the injection and production channel. The lower piston cylinder 430 is arranged in the lower piston cavity, and the lower piston cylinder 430 is clamped with the lower rubber cylinder seat 420.

[0091] Specifically, the second cylinder liner 410 is coaxially and slidably sleeved on the outer periphery of the lower pipe body 120, and one end of the second cylinder liner 410 away from the lower sealing rubber cylinder 900 is connected to the blocking part 500. The lower rubber cylinder seat 420 is coaxially and slidably sleeved on the outer periphery of the lower pipe body 120, and one end of the lower rubber cylinder seat 420 away from the lower sealing rubber cylinder 900 is connected to one end of the second cylinder liner 410 close to the lower sealing rubber cylinder 900. One end of the lower rubber cylinder seat 420 close to the lower sealing rubber cylinder 900 abuts against one end of the lower sealing rubber cylinder 900 away from the second convex block. There is a gap between the inner wall of one end of the second cylinder liner 410 close to the lower sealing rubber cylinder 900 and the inner wall of one end of the lower rubber cylinder seat 420 away from the lower sealing rubber cylinder 900 and the outer wall of the lower pipe body 120. Thus, the lower piston cavity is enclosed by the inner wall of one end of the second cylinder liner 410 close to the lower sealing rubber cylinder 900, the inner wall of the lower rubber cylinder seat 420 away from the lower sealing rubber cylinder 900, and the outer wall of the lower pipe body 120. The lower piston cylinder 430 is slidably arranged in the lower piston cavity, and moreover, the outer wall of one end of the lower piston cylinder 430 close to the lower rubber cylinder seat 420 is threadedly connected to the inner wall of the lower rubber cylinder seat 420 away from the lower sealing rubber cylinder 900. Thus, the movement of the lower piston cylinder 430 can drive the lower rubber cylinder seat 420 to move together. Wherein, a second through hole is formed in the lower pipe body 120, and the injection and production channel is communicated with one end of the lower piston cavity away from the lower sealing rubber cylinder 900 through the second through hole. When the compressed air in the injection and production channel enters the lower piston cavity, the hydraulic pressure of the compressed air can drive the lower piston cylinder 430 to move along the axial direction of the lower pipe body 120 in the lower piston cavity towards the direction close to the lower sealing rubber cylinder 900, driving the lower rubber cylinder seat 420 to move together. Thus, the lower sealing rubber cylinder 900 can be pushed by the lower rubber cylinder seat 420 to apply an extrusion force to the lower sealing rubber cylinder 900, so as to realize the expansion of the lower sealing rubber cylinder 900.

[0092] Furthermore, one end of the lower rubber cylinder seat 420 close to the lower sealing rubber cylinder 900 is connected to the outer wall of the lower pipe body 120 through a fifth pin 421. When the compressed air enters the lower piston cavity, as the hydraulic pressure continuously increases, the fifth pin 421 will be cut off. Thus, the hydraulic pressure of the compressed air can drive the lower piston cylinder 430 to move along the axial direction of the lower pipe body 120 in the lower piston cavity towards the direction close to the lower sealing rubber cylinder 900, driving the lower rubber cylinder seat 420 to move together, so as to realize the expansion of the lower sealing rubber cylinder 900.

[0093] It should be noted that since the blocking part 500 and the lower pipe body 120 are clamped through the first lock ring 520, the relative positions of the blocking part 500 and the lower pipe body 120 are fixed, and the second cylinder liner 410 will not push the blocking part 500 to move along the axial direction of the lower pipe body 120 away from the lower sealing rubber cylinder 900.

[0094] Further, the inner wall of the lower piston cylinder 430 and the outer wall of the lower tube body 120 are slidably connected through a lower guiding key 440. The two ends of the lower guiding key 440 are arranged along the axial direction of the lower tube body 120, so as to be able to limit the moving direction of the lower piston cylinder 430 and ensure the sealing effect of the lower sealing rubber cylinder 900.

[0095] Further, a lower locking ring assembly 450 is arranged between the outer wall of the lower piston cylinder 430 and the inner wall of one end of the second cylinder sleeve 410 close to the lower sealing rubber cylinder 900. The lower locking ring assembly 450 includes: a fourth locking ring 451 and a second limiting key 452. The inner wall of the fourth locking ring 451 is provided with a one-way thread, and the outer wall of the fourth locking ring 451 is provided with a reverse one-way thread. The outer wall of the lower piston cylinder 430 is provided with a one-way thread adapted to the one-way thread on the inner wall of the fourth locking ring 451, so that the inner wall of the fourth locking ring 451 is threadedly connected to the outer wall of the lower piston cylinder 430, thereby realizing one-way locking. The inner wall of the second cylinder sleeve 410 is provided with a reverse one-way thread adapted to the reverse one-way thread on the outer wall of the fourth locking ring 451, so that the outer wall of the fourth locking ring 451 is threadedly connected to the inner wall of the second cylinder sleeve 410, thereby realizing connection and fixation.

[0096] Further, a guiding column 412 is inserted into the second cylinder sleeve 410. One end of the guiding column 412 extends in the radial direction of the lower tube body 120 towards the lower tube body 120 and is slidably embedded in a guiding groove opened on the outer wall of the lower tube body 120. The two ends of the guiding groove extend along the axial direction of the lower tube body 120, so that the guiding column 412 can slide in the guiding groove along the axial direction of the lower tube body 120, thereby connecting the second cylinder sleeve 410 to the lower tube body 120. Through the mutual cooperation of the guiding groove and the guiding column 412, the movable distance of the second cylinder sleeve 410 relative to the lower tube body 120 can be limited. Before unsealing is completed, the guiding column 412 can be clamped with one end of the guiding groove close to the upper tube body 110, so as to maintain the extrusion state of the upper sealing rubber cylinder 800 and the lower sealing rubber cylinder 900. After unsealing is completed, by driving the upper tube body 110 and the lower tube body 120 to move relative to the first sealing portion 200, the anchoring portion 300 and the second sealing portion 400 until the guiding column 412 is clamped with one end of the guiding groove far from the upper tube body 110, it is possible to avoid the first sealing portion 200, the anchoring portion 300 and the second sealing portion 400 from completely detaching from the upper tube body 110 and the lower tube body 120 while ensuring the release of the extrusion state of the upper sealing rubber cylinder 800 and the lower sealing rubber cylinder 900.

[0097] In some specific embodiments of the present invention, refer to Figure 5, the blocking part 500 includes: a third cylinder liner 510, a first locking ring 520, and a locking cylinder 530. The third cylinder liner 510 is slidably sleeved on the outer periphery of the lower pipe body 120, and one end of the third cylinder liner 510 is connected to one end of the second sealing part 400 away from the lower sealing rubber cylinder 900. The inner wall of one end of the third cylinder liner 510 close to the second sealing part 400 and the outer wall of the bottom of the lower pipe body 120 enclose a blocking cavity. The locking cylinder 530 is slidably inserted into the blocking cavity so that one end of the locking cylinder 530 away from the blocking cavity can be exposed in the injection-production channel. A plurality of unlocking grooves 531 are uniformly arranged on the inner wall of one end of the locking cylinder 530 inserted into the blocking cavity.

[0098] Specifically, the third cylinder liner 510 is coaxially and slidably sleeved on the outer periphery of the lower pipe body 120. One end of the third cylinder liner 510 close to the second cylinder liner 410 is wrapped around and fixedly connected to one end of the second cylinder liner 410 close to the third cylinder liner 510. Among them, there are intervals between the inner wall of one end of the third cylinder liner 510 close to the second cylinder liner 410 and the outer wall of one end of the second cylinder liner 410 close to the third cylinder liner 510 and the outer wall of the bottom end of the lower pipe body 120. Thus, a sealing cavity is enclosed by the inner wall of one end of the third cylinder liner 510 close to the second cylinder liner 410, the outer wall of one end of the second cylinder liner 410 close to the third cylinder liner 510, and the outer wall of the bottom end of the lower pipe body 120. The first locking ring 520 is arranged in the sealing cavity and sleeved on the outer periphery of the lower pipe body 120. The inner wall of the first locking ring 520 is provided with a one-way thread, and the outer wall of the bottom end of the lower pipe body 120 is provided with a one-way thread adapted to the one-way thread on the inner wall of the first locking ring 520. So that the inner wall of the first locking ring 520 is threadedly connected to the outer wall of the lower pipe body 120, thereby realizing one-way locking. The lock cylinder 530 is slidably inserted into the sealing cavity. And, one end of the lock cylinder 530 inserted into the sealing cavity has its inner wall wrapped around the outer wall of the first locking ring 520. A plurality of unlocking protrusions 521 are uniformly arranged on the outer wall of the first locking ring 520 along the axial direction of the lower pipe body 120. A plurality of unlocking grooves 531 are uniformly arranged on the inner wall of the end of the lock cylinder 530 inserted into the sealing cavity along the axial direction of the lower pipe body 120. The plurality of unlocking protrusions 521 correspond to the plurality of unlocking grooves 531 one by one, and the unlocking protrusions 521 and the unlocking grooves 531 in each corresponding group are staggered. When the plurality of unlocking grooves 531 of the lock cylinder 530 are misaligned with the plurality of unlocking protrusions 521 of the first locking ring 520, the inner wall of the lock cylinder 530 abuts against the plurality of unlocking protrusions 521 of the first locking ring 520, thereby pressing the first locking ring 520 tightly against the outer peripheral wall of the lower pipe body 120, making the first locking ring 520 firmly clamped to the outer wall of the lower pipe body 120. When the lock cylinder 530 is driven to move along the axial direction of the lower pipe body 120 until the plurality of unlocking grooves 531 of the lock cylinder 530 are exactly aligned with the plurality of unlocking protrusions 521 of the first locking ring 520, under the action of the self-elastic force of the first locking ring 520, it can drive the unlocking protrusions 521 to be embedded into the unlocking grooves 531 until the unlocking grooves 531 completely accommodate the unlocking protrusions 521, thereby realizing the expansion of the first locking ring 520, making the first locking ring 520 away from the lower pipe body 120, and the one-way thread on the inner wall of the first locking ring 520 will also be away from the one-way thread on the outer wall of the lower pipe body 120, thereby releasing the clamping. Facilitating the unsealing operation, improving the unsealing efficiency, being able to quickly complete the unsealing, facilitating replacement and repair, and avoiding affecting the normal operation of the air energy storage system.

[0099] Further, when the inner wall of the first locking ring 520 is threadedly connected to the outer wall of the lower pipe body 120 to achieve one-way locking, one end of the second cylinder sleeve 410 close to the third cylinder sleeve 510 abuts against one end of the first locking ring 520 close to the second cylinder sleeve 410. Thus, when the first locking ring 520 is clamped to the lower pipe body 120, the first locking ring 520 with a fixed position can support the second cylinder sleeve 410 from below, thereby ensuring the stable arrangement of multiple components of the first sealing portion 200, the anchoring portion 300, and the second sealing portion 400.

[0100] Further, the outer wall of the lock cylinder 530 and the inner wall of the third cylinder sleeve 510 are connected by a sixth pin to avoid missealing. When unsealing is required, the sixth pin can be cut by driving the lock cylinder 530 to move.

[0101] In some specific embodiments of the present invention, referring to Figure 5 , one end of the second sealing portion 400 away from the lower sealing rubber cylinder 900 extends axially along the blocking cavity and is inserted into the blocking cavity. A retaining step 411 is provided on the outer wall of the end of the second sealing portion 400 inserted into the blocking cavity, and a hook 532 is provided on the inner wall of the end of the lock cylinder 530 inserted into the blocking cavity. The retaining step 411 and the hook 532 are mutually adapted. Specifically, a convex structure is provided on the outer wall of one end of the second cylinder sleeve 410 close to the third cylinder sleeve 510, so as to form a retaining step 411 on the outer wall of one end of the second cylinder sleeve 410 close to the third cylinder sleeve 510. A hook 532 is provided on the inner wall of the end of the lock cylinder 530 inserted into the blocking cavity. When the lock cylinder 530 is driven to move until the multiple unlocking grooves 531 of the lock cylinder 530 are directly opposite to the multiple unlocking protrusions 521 of the first locking ring 520 one by one, the hook 532 of the lock cylinder 530 can be clamped with the retaining step 411 of the second cylinder sleeve 410, thereby ensuring the stability of maintaining the unlocking state.

[0102] In some specific embodiments of the present invention, referring to Figure 5 , a connecting ring 540 is provided at one end of the third cylinder sleeve 510 away from the second sealing portion 400 for connecting the lower joint 700. The lower joint 700 can be fixedly sleeved through the bottom of the connecting ring 540, thereby facilitating the connection of underground equipment. And, one end of the connecting ring 540 close to the lock cylinder 530 extends axially in the direction close to the lock cylinder 530 and abuts against the end of the lock cylinder 530 away from the blocking cavity. Thus, the lock cylinder 530 can be supported from below by the connecting ring 540 to ensure the stability of the arrangement of the lock cylinder 530.

[0103] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A double-stage sealed injection-production packer, characterized in that, Comprising: An injection-production part (100) which is arranged along the axial direction of the casing, and an injection-production channel is formed therein. A first sealing part (200), an anchoring part (300), a second sealing part (400) and a blocking part (500) are sequentially sleeved on the outer periphery of the injection-production part (100) in a sliding manner; One end of the first sealing part (200) is abutted with an upper sealing rubber cylinder (800), and one side is communicated with the injection-production channel. The first sealing part (200) is driven by hydraulic pressure to slide and extrude the upper sealing rubber cylinder (800); One end of the second sealing part (400) is abutted with a lower sealing rubber cylinder (900), and one side is communicated with the injection-production channel. The second sealing part (400) is driven by hydraulic pressure to slide and extrude the lower sealing rubber cylinder (900); A slip (330) is arranged on the anchoring part (300), and one end is connected with the end of the first sealing part (200) far away from the upper sealing rubber cylinder (800); A blocking cavity is arranged between one side of the blocking part (500) and the injection-production part (100); A first locking ring (520) is arranged in the blocking cavity. One side of the first locking ring (520) is clamped with the injection-production part (100), and a plurality of unlocking protrusions (521) are arranged on the other side of the first locking ring (520); A locking cylinder (530) is also slidably arranged in the blocking cavity. A plurality of unlocking grooves (531) are arranged on one side of the locking cylinder (530), and the plurality of unlocking protrusions (521) correspond to the plurality of unlocking grooves (531) one by one; When the unlocking protrusions (521) and the unlocking grooves (531) are arranged opposite to each other, the first locking ring (520) drives the unlocking protrusions (521) to be embedded in the unlocking grooves (531); The injection-production part (100) includes: An upper pipe body (110), and the first sealing part (200) is slidably sleeved on the outer periphery of the upper pipe body (110); A first convex block is arranged on the outer periphery of the upper pipe body (110), and one end of the first convex block abuts against the end of the upper sealing rubber cylinder (800) far away from the first sealing part (200); A lower pipe body (120), the top end of the lower pipe body (120) is connected with the bottom end of the upper pipe body (110), and the second sealing part (400) is slidably sleeved on the outer periphery of the lower pipe body (120); A second convex block is arranged on the outer periphery of the lower pipe body (120), and one end of the second convex block abuts against the end of the lower sealing rubber cylinder (900) far away from the second sealing part (400); The blocking part (500) includes: A third cylinder sleeve (510) which is slidably sleeved on the outer periphery of the lower pipe body (120), and one end is connected with the end of the second sealing part (400) far away from the lower sealing rubber cylinder (900); The inner wall of one end of the third cylinder sleeve (510) close to the second sealing part (400) and the outer wall of the bottom end of the lower pipe body (120) enclose the blocking cavity; The locking cylinder (530) is slidably inserted into the blocking cavity, and the end of the locking cylinder (530) far away from the blocking cavity is exposed in the injection-production channel; A plurality of the unlocking grooves (531) are uniformly arranged on the inner wall of one end of the lock cylinder (530) inserted into the blocking cavity; One end of the second sealing part (400) far from the lower sealing rubber cylinder (900) extends along the axial direction of the blocking cavity and is inserted into the blocking cavity; A retaining step (411) is arranged on the outer wall of one end of the second sealing part (400) inserted into the blocking cavity, and a hook claw (532) is arranged on the inner wall of one end of the lock cylinder (530) inserted into the blocking cavity. The retaining step (411) and the hook claw (532) are mutually adapted; A connecting ring (540) is arranged at one end of the third cylinder sleeve (510) far from the second sealing part (400); One end of the connecting ring (540) extends along the axial direction of the lock cylinder (530) towards the direction close to the lock cylinder (530) and abuts against one end of the lock cylinder (530) far from the blocking cavity.

2. The double-stage sealed injection-production packer according to claim 1, wherein, The first sealing part (200) includes: A first cylinder sleeve (210), which is slidably sleeved on the outer periphery of the upper pipe body (110), and one end of which is connected to one end of the anchoring part (300); An upper rubber cylinder seat (220), which is slidably sleeved on the outer periphery of the upper pipe body (110), one end of which is connected to the end of the first cylinder sleeve (210) far from the anchoring part (300), and the other end of which abuts against one end of the upper sealing rubber cylinder (800) far from the first bump; The inner wall of the first cylinder sleeve (210), the inner wall of the upper rubber cylinder seat (220) and the outer wall of the upper pipe body (110) enclose an upper piston cavity, and the upper piston cavity is communicated with the injection-production channel; An upper piston cylinder (230), which is arranged in the upper piston cavity and is clamped with the upper rubber cylinder seat (220).

3. The double-stage sealed injection-production packer according to claim 1, wherein, The anchoring part (300) includes: A first pushing ring (310), which is slidably sleeved on the outer periphery of the upper pipe body (110), and one end of which is connected to the first sealing part (200) far from the upper sealing rubber cylinder (800); A second pushing ring (320), which is slidably sleeved on the outer periphery of the upper pipe body (110) opposite to the first pushing ring (310); The slip joint (330) is arranged between the first pushing ring (310) and the first pushing ring (310).

4. The double-stage sealed injection-production packer according to claim 3, characterized in that, One end of the second bump extends along the axial direction of the upper pipe body (110) towards the direction close to the second pushing ring (320) and is connected to the end of the second pushing ring (320) far from the slip joint (330).

5. The double-stage sealed injection-production packer according to claim 3, wherein, On the outer side of one end of the first pushing ring (310) close to the slip joint (330), a first upper conical surface (312), a second upper conical surface (313) and a third upper conical surface (314) are sequentially arranged from top to bottom; On the inner side of one end of the slip joint (330) close to the first pushing ring (310), a first auxiliary upper conical surface, a second auxiliary upper conical surface and a third auxiliary upper conical surface are sequentially arranged from top to bottom; The first upper conical surface (312), the second upper conical surface (313), and the third upper conical surface (314) are respectively and correspondingly fitted with the first auxiliary upper conical surface, the second auxiliary upper conical surface, and the third auxiliary upper conical surface; On the outer side of one end of the second pushing ring (320) close to the slips (330), a first lower conical surface (322), a second lower conical surface (323), and a third lower conical surface (324) are sequentially arranged from bottom to top; On the inner side of one end of the slips (330) close to the second pushing ring (320), a first auxiliary lower conical surface (331), a second auxiliary lower conical surface (332), and a third auxiliary lower conical surface (333) are sequentially arranged from bottom to top; The first lower conical surface (322), the second lower conical surface (323), and the third lower conical surface (324) are respectively and correspondingly fitted with the first auxiliary lower conical surface (331), the second auxiliary lower conical surface (332), and the third auxiliary lower conical surface (333).

6. The double-stage sealed injection-production packer according to claim 1, wherein, The second sealing portion (400) includes: A second cylinder sleeve (410) is slidably sleeved on the outer periphery of the lower pipe body (120), and one end thereof is connected to one end of the blocking portion (500); A lower rubber cylinder seat (420) is slidably sleeved on the outer periphery of the lower pipe body (120), one end thereof is connected to the end of the second cylinder sleeve (410) away from the blocking portion (500), and the other end thereof abuts against the end of the upper sealing rubber cylinder (800) away from the second bump; The inner wall of the second cylinder sleeve (410), the inner wall of the lower rubber cylinder seat (420), and the outer wall of the lower pipe body (120) enclose a lower piston cavity, and the lower piston cavity is communicated with the injection-production channel; A lower piston cylinder (430) is arranged in the lower piston cavity and is clamped with the lower rubber cylinder seat (420).

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