Two-stage sealing injection-production packer

Abstract

The invention relates to the technical field of in-well injection and production equipment, in particular to a two-stage sealing injection and production packer which comprises an injection and production part, and a first sealing part, an anchoring part, a second sealing part and a blocking part which are sequentially arranged on the periphery of the injection and production part in a sliding and sleeving mode. The first sealing part can slidably extrude the upper sealing rubber barrel; the second sealing part can slidably extrude the lower sealing rubber barrel; one end of the anchoring part is connected with the first sealing part; one side of the blocking part is clamped with the injection-production part through a first locking ring; an unlocking bulge is arranged on the first lock ring; an unlocking groove is formed in the lock cylinder; when the unlocking protrusion is right opposite to the unlocking groove, the unlocking protrusion is embedded in the unlocking groove. Two-stage sealing arrangement is formed through the first sealing part and the second sealing part, the sealing effect is improved, the probability of sealing problems is reduced, clamping of the lock ring can be relieved by moving the lock cylinder, and therefore extrusion force is released for unsealing, the unsealing efficiency is improved, replacement and maintenance are convenient, and normal operation of the air energy storage system is prevented from being affected.

Description

Technical Field

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

[0002] Compressed air energy storage is a direct application of large-scale energy storage and power generation technology. In the air energy storage system, the injection and production packer is mainly used to store compressed air in the ground or underground gas storage reservoir, and to control and adjust it when the air energy 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, so the existing injection and production packers also need to be maintained in use for a long time, and during this period, they need to be rotated every day according to the peak and low power levels to achieve energy storage and release. However, the existing injection and production packers generally have a single sealing structure. As time goes by, 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, under normal circumstances, there will still be a partial sealing effect. Because there is no special unsealing mechanism on the injection and production packer, the injection and production packer with sealing problems is difficult to quickly remove and replace and repair, which affects the normal operation of the air energy storage system.

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

[0005] In view of the above problems, the present invention proposes a dual-stage sealing injection-production packer, comprising:

[0006] The injection and extraction part is arranged along the axial direction of the casing, and an injection and extraction channel is opened therein. A first sealing part, an anchoring part, a second sealing part and a blocking part are slidably sleeved on the outer circumference of the injection and extraction part in sequence;

[0007] One end of the first sealing part is abutted against an upper sealing rubber cylinder, and one side is communicated with the injection and extraction channel, and 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 abutted against a lower sealing rubber cylinder, and one side is communicated with the injection and extraction channel, and the second sealing part is driven by hydraulic pressure to slide and squeeze the lower sealing rubber cylinder;

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

[0010] A blocking cavity is provided between one side of the blocking portion and the injection and extraction portion;

[0011] A first locking ring is arranged in the blocking cavity, one side of the first locking ring is clamped with the injection and extraction part, and the other side of the first locking ring is provided with a plurality of unlocking protrusions;

[0012] A lock cylinder is also slidably arranged in the blocking cavity, and 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 protrusion and the unlocking groove are arranged opposite to each other, the first locking ring drives the unlocking protrusion to be embedded in the unlocking groove.

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

[0015] An upper tube body, wherein the first sealing portion is slidably sleeved on the outer circumference of the upper tube body;

[0016] A first protrusion is arranged on the outer periphery of the upper tube body, and one end of the first protrusion abuts against one end of the upper sealing rubber tube away from the first sealing portion;

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

[0018] A second protrusion is arranged on the outer periphery of the lower tube body, and one end of the second protrusion abuts against one end of the lower sealing rubber tube away from the second sealing portion.

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

[0020] A first cylinder sleeve, which is slidably sleeved on the outer circumference of the upper tube body and one end of which is connected to one end of the anchoring portion;

[0021] An upper rubber cylinder seat is slidably sleeved on the outer circumference of the upper tube body, one end of which is connected to an end of the first cylinder sleeve away from the anchoring portion, and the other end of which is abutted against an end of the upper sealing rubber cylinder away from the first protrusion;

[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 tube body together form an upper piston chamber, and the upper piston chamber is communicated with the injection and production channel;

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

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

[0025] A first push ring is slidably sleeved on the outer circumference of the upper tube body, and one end of the first push ring is connected to the first sealing portion away from the upper sealing rubber cylinder;

[0026] A second push ring is slidably sleeved on the outer circumference of the upper tube body opposite to the first push ring;

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

[0028] In some specific embodiments, one end of the second protrusion extends along the axial direction of the upper tube toward the second push ring and is connected to an end of the second push ring away from the slip.

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

[0030] The inner side of one end of the slip close to the first push ring is provided with a first auxiliary upper conical surface, a second auxiliary upper conical surface and a third auxiliary upper conical surface in sequence from top to bottom;

[0031] The first upper conical surface, the second upper conical surface and the third upper conical surface are inlaid with the first auxiliary upper conical surface, the second auxiliary upper conical surface and the third auxiliary upper conical surface in a one-to-one correspondence;

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

[0033] The inner side of one end of the slip close to the second push ring is provided with a first auxiliary lower conical surface, a second auxiliary lower conical surface and a third auxiliary lower conical surface in sequence from bottom to top;

[0034] The first lower conical surface, the second lower conical surface and the third lower conical surface are engaged with the first auxiliary lower conical surface, the second auxiliary lower conical surface and the third auxiliary lower conical surface in a one-to-one correspondence.

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

[0036] A second cylinder sleeve, which is slidably sleeved on the outer circumference of the lower tube body and one end of which is connected to one end of the blocking portion;

[0037] A lower rubber cylinder seat is slidably sleeved on the outer periphery of the lower tube body, one end of which is connected to an end of the second cylinder sleeve away from the blocking portion, and the other end of which is abutted against an end of the upper sealing rubber cylinder away from the second protrusion;

[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 tube body together form a lower piston chamber, and the lower piston chamber is communicated with the injection and production channel;

[0039] The 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 sleeve, which is slidably sleeved on the outer circumference of the lower tube body, and one end of which is connected to an end of the second sealing portion away from the lower sealing rubber cylinder;

[0042] The inner wall of one end of the third cylinder sleeve close to the second sealing portion and the outer wall of the bottom end of the lower tube body together form the blocking chamber;

[0043] The lock cylinder is slidably inserted in the blocking cavity, and one end of the lock cylinder away from the blocking cavity is exposed in the injection and extraction channel;

[0044] A plurality of unlocking grooves are evenly arranged on the inner wall of one end of the lock 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] The outer wall of one end of the second sealing part inserted in the blocking cavity is provided with a back-stopping step, and the inner wall of one end of the lock cylinder inserted in the blocking cavity is provided with a hook claw, and the back-stopping step and the hook claw are adapted to each other.

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

[0048] One end of the connecting ring extends along the axial direction of the lock cylinder toward the lock cylinder and abuts against one end of the lock cylinder away from the blocking cavity.

[0049] The double-stage sealing injection and production packer of the present invention, through the anchoring part connected to the first sealing part, can, under the action of the liquid pressure in the injection and production channel, make the slip expand in the direction away from the injection and production part and contact with the inner wall of the casing, thereby achieving sealing. At the same time, through the first sealing part and the second sealing part slidably sleeved on the injection and production part, the upper sealing rubber cylinder and the lower sealing rubber cylinder can be squeezed respectively under the action of the liquid pressure in the injection and production channel, so that the upper sealing rubber cylinder and the lower sealing rubber cylinder expand in the direction away from the injection and production part and abut against the inner wall of the casing, thereby performing a double-stage sealing setting, improving the sealing effect, and reducing the probability of sealing problems. When the lock cylinder in the blocking cavity is driven to slide until the unlocking protrusion of the first locking ring is opposite to the unlocking groove of the lock cylinder, the first locking ring can drive the unlocking protrusion to be embedded in the unlocking groove under its own elastic action, so that the first locking ring can be expanded, and then the clamping connection between the first locking ring and the injection and extraction part is released, so that the injection and extraction part can slide relative to the first sealing part, the second sealing part and the anchoring part, thereby relieving the squeezing force on the upper sealing rubber cylinder, the lower sealing rubber cylinder and the slip, realizing the unsealing operation, improving the unsealing efficiency, being able to complete the unsealing quickly, facilitating replacement and maintenance, 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, and partly become obvious from the description, or be understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0052] Figure 1 A schematic diagram of a double-stage sealing injection-production packer in an embodiment of the present invention is shown;

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

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

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

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

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

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

[0059] Figure 8 A schematic diagram of a slip in an embodiment of the present invention is shown;

[0060] Fig. 9 for Figure 2 A schematic cross-sectional view of AA in FIG.

[0061] Fig.10 for Figure 3 A schematic cross-sectional view of BB in FIG.

[0062] Fig.11 for Figure 5 Schematic cross-sectional view of CC in FIG.

[0063] In the figure, 100, injection and extraction part; 110, upper tube body; 111, first protrusion; 120, lower tube 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, slip; 3 31. first auxiliary lower cone; 332. second auxiliary lower cone; 333. third auxiliary lower cone; 340. third locking ring; 350. long key; 400. second sealing portion; 410. second cylinder sleeve; 411. stop step; 412. guide column; 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 portion; 510. third cylinder sleeve; 520. first locking ring; 521. unlocking protrusion; 530. locking cylinder; 531. unlocking groove; 532. hook; 540. connecting ring; 600. coupling; 700. lower joint; 800. upper sealing rubber cylinder; 900. lower sealing rubber cylinder. DETAILED DESCRIPTION

[0064] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

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

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

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

[0068] Again, one end of the anchoring part 300 away from the first sealing part 200 is connected to the injection and production part 100, and one end of the anchoring part 300 close to the first sealing part 200 is connected to one end away from the upper sealing rubber cylinder 800. Under the action of the liquid pressure in the injection and production channel, the first sealing part 200 can be driven by the liquid pressure in the injection and production channel to squeeze the anchoring part 300, thereby squeezing the cava 330 arranged on the anchoring part 300. Under the action of the squeezing, the entire cava 330 can expand in the direction away from the injection and production part 100 until the cava 330 abuts against the inner wall of the casing, thereby achieving sealing.

[0069] Fourth, the blocking cavity is coaxially sleeved on the outer periphery of the bottom of the injection and extraction part 100, and the side of the blocking part 500 close to the injection and extraction part 100 and the outer periphery of the injection and extraction part 100 are enclosed to form a blocking cavity. The first lock ring 520 and the lock cylinder 530 are both arranged in the blocking cavity, and the side of the first lock ring 520 away from the lock cylinder 530 is clamped with the outer peripheral surface of the injection and extraction part 100, and the other side of the first lock ring 520 is uniformly provided with a plurality of unlocking protrusions 521, and the side of the lock cylinder 530 close to the first lock ring 520 is uniformly provided with a plurality of unlocking grooves 531, and the plurality of unlocking protrusions 521 correspond to the plurality of unlocking grooves 531 one by one, and each corresponding group of unlocking protrusions 521 and unlocking grooves 531 are staggered. In addition, the lock cylinder 530 is slidably arranged in the blocking cavity, so that the lock cylinder 530 can drive the unlocking groove 531 to move until the unlocking groove 531 is arranged directly opposite to the unlocking groove 531. When the lock cylinder 530 drives the unlocking grooves 531 to be staggered with each other, the unlocking protrusion 521 of the first lock ring 520 can abut against the inner wall of the lock cylinder 530, thereby limiting the first lock ring 520 and maintaining the clamping connection between the first lock ring 520 and the injection and extraction part 100.

[0070] Finally, when the lock cylinder 530 drives the unlocking groove 531 to move until the unlocking protrusion 521 is directly opposite to the unlocking groove 531, the unlocking groove 531 can accommodate the unlocking protrusion 521. Under the elastic force of the first lock ring 520, the first lock ring 520 can expand while driving the unlocking protrusion 521 to be embedded in the unlocking groove 531, so that the first lock ring 520 is away from the injection and extraction part 100, so that the injection and extraction part 100 is released from the clamping connection with the first lock ring 520, so that the relative positions between the injection and extraction part 100 and the blocking part 500 are no longer fixed to each other. That is, the relative positions between the injection and production part 100 and the first sealing part 200, the anchoring part 300, and the second sealing part 400 are no longer fixed to each other. At this time, the injection and production part 100 can slide relative to the first sealing part 200, the second sealing part 400 and the anchoring part 300 through pulling force, thereby releasing the extrusion force exerted by the original liquid pressure on the upper sealing rubber cylinder 800, the lower sealing rubber cylinder 900 and the slip 330, so as to facilitate the unsealing operation, improve the unsealing efficiency, quickly complete the unsealing, facilitate replacement and maintenance, and avoid 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 and extraction part 100 includes: an upper tube body 110 and a lower tube body 120. The first sealing part 200 is sleeved on the upper part of the outer periphery of the upper tube body 110. A first protrusion is provided on the upper part of the outer periphery of the upper tube body 110, and one end of the first protrusion abuts against one end of the upper sealing rubber tube 800 away from the first sealing part 200. The top of the lower tube body 120 is connected to the bottom of the upper tube body 110, and the second sealing part 400 is sleeved on the upper part of the outer periphery of the lower tube body 120. A second protrusion is provided on the upper part of the outer periphery of the lower tube body 120, and one end of the second protrusion abuts against one end of the lower sealing rubber tube 900 away from the second sealing part 400.

[0072] Specifically, refer to Figure 1 The top of the upper tube 110 is coaxially sleeved with a coupling 600 for connecting to ground equipment. Figure 4 , the top end of the lower tube 120 is coaxially sleeved on the bottom end of the upper tube 110. A first protrusion is coaxially sleeved on the outer periphery of the end of the upper tube 110 close to the coupling 600, and the end of the first protrusion close to the first sealing part 200 abuts against the end of the upper sealing rubber tube 800 away from the first sealing part 200, thereby ensuring that the first sealing part 200 can apply an extrusion force to the upper sealing rubber tube 800. A second protrusion is coaxially sleeved on the outer periphery of the end of the lower tube 120 close to the upper tube 110, and the end of the second protrusion close to the second sealing part 400 abuts against the end of the lower sealing rubber tube 900 away from the second sealing part 400, thereby ensuring that the second sealing part 400 can apply an extrusion force to the lower sealing rubber tube 900.

[0073] Furthermore, a bending structure is provided at the top end of the lower tube body 120, so that the bottom end of the upper tube body 110 can be covered by the bending structure, that is, the inner diameter of the position where the bending structure is provided on the lower tube body 120 is adapted to the outer diameter of the upper tube body 110, while the outer diameter of the position where the bending structure is not provided on the lower tube body 120 is still the same as the outer diameter of the upper tube body 110, thereby facilitating the mutual adaptation between the first sealing part 200 and the second sealing part 400, thereby ensuring that 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 part 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 part 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 one end of the first cylinder sleeve 210 away from the anchoring part 300, and the other end is abutted against one end of the upper sealing rubber cylinder 800 away from the first protrusion. 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 are surrounded by an upper piston cavity, and the upper piston cavity is connected to the injection and production channel. The upper piston cylinder 230 is arranged 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 sleeve 210 is coaxially slidably sleeved on the outer periphery of the upper tube body 110, and one end of the first cylinder sleeve 210 away from the upper sealing rubber cylinder 800 is connected to the anchoring portion 300. The upper rubber cylinder seat 220 is coaxially slidably sleeved on the outer periphery of the upper tube body 110, and 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, 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 protrusion. There is a gap between the inner wall of the end of the first cylinder sleeve 210 close to the upper sealing rubber cylinder 800, the inner wall of the end of the upper rubber cylinder seat 220 away from the upper sealing rubber cylinder 800, and the outer wall of the upper tube body 110, so that the upper piston chamber is surrounded by the inner wall of the end of the first cylinder sleeve 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 tube body 110. The upper piston cylinder 230 is slidably arranged in the upper piston chamber, and the outer wall of the end of the upper piston cylinder 230 close to the upper rubber cylinder seat 220 is threadedly connected with the inner wall of the upper rubber cylinder seat 220 away from the upper sealing rubber cylinder 800, so that the movement of the upper piston cylinder 230 can drive the upper rubber cylinder seat 220 to move together. Among them, a first through hole is opened on the upper tube body 110, and the injection and production channel is connected with the end of the upper piston chamber away from the upper sealing rubber cylinder 800 through the first through hole. When the compressed air in the injection and extraction channel enters the upper piston chamber, the hydraulic pressure of the compressed air can drive the upper piston cylinder 230 to move along the axial direction of the upper tube body 110 in the upper piston chamber toward the direction close to the upper sealing rubber cylinder 800, thereby driving the upper rubber cylinder seat 220 to push the upper sealing rubber cylinder 800 to apply a squeezing force to the upper sealing rubber cylinder 800 to achieve the expansion of the upper sealing rubber cylinder 800. At the same time, when the compressed air in the injection and extraction channel enters the upper piston chamber, the hydraulic pressure of the compressed air can also drive the first cylinder sleeve 210 to move along the axial direction of the upper tube body 110 toward the direction close to the anchoring part 300, thereby indirectly applying a squeezing force to the anchoring part 300 to achieve the expansion of the slip 330.

[0076] Further, the end of the upper rubber cylinder seat 220 away from the upper rubber cylinder 800 is connected to the end of the first cylinder sleeve 210 close to the upper rubber cylinder 800 through the first pin 211, and the end of the upper rubber cylinder seat 220 close to the upper rubber cylinder 800 is connected to the outer wall of the upper tube 110 through the second pin 221. When the compressed air enters the upper piston chamber, as the hydraulic pressure continues to increase, the first pin 211 will be sheared 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 tube 110 toward the direction close to the anchoring part 300 to achieve the expansion of the slip 330. As the hydraulic pressure further increases, the second pin 221 will be sheared 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 tube 110 toward the direction close to the upper rubber cylinder 800 in the upper piston chamber, so as to achieve the expansion of the upper rubber cylinder 800. With this structural arrangement, setting can be performed first and then sealing, thereby ensuring setting effect and sealing effect.

[0077] Furthermore, the inner wall of the upper piston cylinder 230 is slidably connected to the outer wall of the upper tube body 110 via an upper guide key 240, and both ends of the upper guide key 240 are arranged along the axial direction of the upper tube body 110, thereby limiting the moving direction of the upper piston cylinder 230 and ensuring 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 the first cylinder sleeve 210 near one end of the upper sealing rubber cylinder 800, and the upper locking ring assembly 250 includes: a second locking ring 251 and a first limit 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 that matches 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 with the outer wall of the upper piston cylinder 230, thereby achieving one-way locking. The inner wall of the first cylinder sleeve 210 is provided with a reverse one-way thread that matches 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 with the inner wall of the first cylinder sleeve 210, thereby achieving connection and fixing.

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

[0080] Specifically, the first push ring 310 is coaxially slidably sleeved on the outer periphery of the upper tube body 110, and one end of the first push ring 310 close to the upper sealing rubber cylinder 800 is fixedly connected to one end of the first cylinder sleeve 210 away from the upper sealing rubber cylinder 800, and the inner wall of the end of the first cylinder sleeve 210 away from the upper sealing rubber cylinder 800 is covered on the outer wall of the end of the first push ring 310 close to the upper sealing rubber cylinder 800. The second push ring 320 is symmetrically arranged with the first push ring 310, and the second push ring 320 is coaxially fixedly sleeved on the outer periphery of the upper tube body 110, and one end of the second push ring 320 close to the upper sealing rubber cylinder 800 is arranged opposite to the first push ring 310, and there is a gap between one end of the second push ring 320 close to the upper sealing rubber cylinder 800 and one end of the first push ring 310 away from the upper sealing rubber cylinder 800. The slips 330 are disposed between one end of the first push ring 310 away from the upper sealing rubber cylinder 800 and one end of the second push ring 320 close to the upper sealing rubber cylinder 800. When the first cylinder sleeve 210 moves along the axial direction of the upper tube 110 toward the anchoring portion 300, the first push ring 310 is driven to move along the axial direction of the upper tube 110 toward the second push ring 320, so that the slips 330 can be squeezed by the mutual cooperation of the first push ring 310 and the second push ring 320, thereby realizing the expansion and setting of the slips 330.

[0081] Furthermore, one end of the first push ring 310 close to the slip 330 is connected to one end of the slip 330 close to the first push ring 310 through the third pin 311, and one end of the second push ring 320 close to the slip 330 is connected to one end of the slip 330 close to the second push ring 320 through the fourth pin 321. When the first cylinder sleeve 210 pushes the first push ring 310 to move in the direction close to the slip 330, the fourth pin 321 is first sheared off, so that the second push ring 320 pushes the end of the slip 330 close to the second push ring 320 to expand, and if the pressure is continuously applied, the third pin 311 will be sheared off, so that the first push ring 310 pushes the end of the slip 330 close to the first push ring 310 to expand, thereby realizing the overall expansion of the slip 330 and achieving the setting in the casing.

[0082] Furthermore, a plurality of long keys 350 are arranged between the inner wall of the second push ring 320 and the outer wall of the upper tube body 110. The two ends of the long keys 350 are arranged along the axial direction of the upper tube body 110 and are respectively engaged with the inner wall of the second push ring 320 and the outer wall of the upper tube body 110. The long keys 350 can limit and prevent the second push ring 320 from rotating, and can also limit and prevent the cava 330 from rotating when it expands.

[0083] Further, an upper third locking ring 340 is provided between the outer wall of the upper tube body 110 and the inner wall of the first push ring 310 at one end 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 that matches 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 achieving one-way locking. The inner wall of the first push ring 310 is provided with a reverse one-way thread that matches 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 push ring 310, thereby achieving connection and fixing.

[0084] It should be noted that the slip 330 itself is an existing elastic component. Under the action of extrusion, the slip 330 can achieve elastic expansion of the diameter, and then gradually contact the inner wall of the casing, so that the slip 330 teeth 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 protrusion extends along the axial direction of the upper tube body 110 toward the second push ring 320 and is connected to an end of the second push ring 320 away from the slip 330.

[0086] Specifically, the second protrusion is also a bending structure as a whole, so that the end of the second protrusion close to the lower sealing rubber tube 900 can be sleeved on the outer periphery of the position of the lower tube body 120 where the bending structure is not set, so as to facilitate the abutment with the lower sealing rubber tube 900, and the end of the second protrusion away from the lower sealing rubber tube 900 can pass through the bending structure of the lower tube body 120 and extend along the axial direction of the upper tube body 110 toward the second push ring 320 until the end of the second protrusion away from the lower sealing rubber tube 900 is connected to the end of the second push ring 320 away from the cava 330, so that the second protrusion can be supported under the second push ring 320, so that the relative position of the second push ring 320 to the upper tube body 110 is fixed, which is convenient for cooperating with the first push ring 310 to extrude the cava 330.

[0087] In some specific embodiments of the present invention, referring to Figure 6 The first push ring 310 is provided with a first upper conical surface 312, a second upper conical surface 313 and a third upper conical surface 314 in sequence from top to bottom on the outer side of the end close to the slip 330. Figure 8 The inner side of the end of the slip 330 close to the first push ring 310 is provided with a first auxiliary upper conical surface, a second auxiliary upper conical surface and a third auxiliary upper conical surface in order from top to bottom. The first upper conical surface 312, the second upper conical surface 313 and the third upper conical surface 314 are correspondingly engaged with the first auxiliary upper conical surface, the second auxiliary upper conical surface and the third auxiliary upper conical surface. Figure 7The first lower conical surface 322, the second lower conical surface 323 and the third lower conical surface 324 are sequentially arranged from bottom to top on the outer side of the end of the second push ring 320 close to the slip 330. The first auxiliary lower conical surface 331, the second auxiliary lower conical surface 332 and the third auxiliary lower conical surface 333 are sequentially arranged from bottom to top on the inner side of the end of the slip 330 close to the second push ring 320. The first lower conical surface 322, the second lower conical surface 323 and the third lower conical surface 324 are correspondingly engaged 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 sleeve 210 pushes the first push ring 310 to move toward the direction close to the cava 330, the fourth pin 321 is sheared off first, and the first auxiliary lower cone surface 331, the second auxiliary lower cone surface 332 and the third auxiliary lower cone surface 333 of the cava 330 contact with the first lower cone surface 322, the second lower cone surface 323 and the third lower cone surface 324 of the second push ring 320 in sequence, thereby pushing the cava 330 to expand close to one end of the second push ring 320, and continue to apply pressure, the third pin 311 will be sheared off, and the first auxiliary upper cone surface, the second auxiliary upper cone surface and the third auxiliary upper cone surface of the cava 330 contact with the first upper cone surface 312, the second upper cone surface 313 and the third upper cone surface 314 of the first push ring 310 in sequence, thereby pushing the cava 330 to expand close to one end of the first push ring 310, thereby realizing the overall expansion of the cava 330 and realizing the sealing 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 push 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 push ring 320, and the first auxiliary upper conical surface, the second auxiliary upper conical surface and the third auxiliary upper conical surface of the cava 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, and 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 sleeve 410, a lower rubber cylinder seat 420 and a lower piston cylinder 430. The second cylinder sleeve 410 is slidably sleeved on the outer periphery of the lower tube body 120, and one end of the second cylinder sleeve 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 tube body 120, and one end of the lower rubber cylinder seat 420 is connected to one end of the second cylinder sleeve 410 away from the blocking part 500, and the other end is abutted against one end of the upper sealing rubber cylinder 800 away from the second protrusion. 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 tube body 120 are surrounded to form a lower piston cavity, and the lower piston cavity is connected to 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 sleeve 410 is coaxially slidably sleeved on the outer periphery of the lower tube body 120, and one end of the second cylinder sleeve 410 away from the lower sealing rubber cylinder 900 is connected to the blocking portion 500. The lower rubber cylinder seat 420 is coaxially slidably sleeved on the outer periphery of the lower tube 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 sleeve 410 close to the lower sealing rubber cylinder 900, and 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 protrusion. There is a gap between the inner wall of the end of the second cylinder sleeve 410 close to the lower sealing rubber cylinder 900 and the inner wall of the end of the lower rubber cylinder seat 420 away from the lower sealing rubber cylinder 900 and the outer wall of the lower tube body 120, so that the lower piston chamber is surrounded by the inner wall of the end of the second cylinder sleeve 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 tube body 120. The lower piston cylinder 430 is slidably arranged in the lower piston chamber, and the outer wall of the end of the lower piston cylinder 430 close to the lower rubber cylinder seat 420 is threadedly connected with the inner wall of the lower rubber cylinder seat 420 away from the lower sealing rubber cylinder 900, so that the movement of the lower piston cylinder 430 can drive the lower rubber cylinder seat 420 to move together. Among them, a second through hole is opened on the lower tube body 120, and the injection and production channel is connected with the end of the lower piston chamber away from the lower sealing rubber cylinder 900 through the second through hole. When the compressed air in the injection channel enters the lower piston chamber, the hydraulic pressure of the compressed air can drive the lower piston cylinder 430 to move in the lower piston chamber along the axial direction of the lower tube body 120 toward the lower sealing rubber cylinder 900, thereby driving the lower rubber cylinder seat 420 to move together. 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 achieve 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 tube body 120 through the fifth pin 421. When the compressed air enters the lower piston chamber, as the hydraulic pressure continues to increase, the fifth pin 421 will be sheared off, so that the hydraulic pressure of the compressed air can drive the lower piston cylinder 430 to move along the axial direction of the lower tube body 120 in the lower piston chamber toward the lower sealing rubber cylinder 900, thereby driving the lower rubber cylinder seat 420 to move together, so as to achieve the expansion of the lower sealing rubber cylinder 900.

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

[0094] Furthermore, the inner wall of the lower piston cylinder 430 is slidably connected to the outer wall of the lower tube body 120 via a lower guide key 440, and both ends of the lower guide key 440 are arranged along the axial direction of the lower tube body 120, thereby limiting the moving direction of the lower piston cylinder 430 and ensuring 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 the second cylinder sleeve 410 near one end of the lower sealing rubber cylinder 900, and the lower locking ring assembly 450 includes: a fourth locking ring 451 and a second limit 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 that matches 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 achieving one-way locking. The inner wall of the second cylinder sleeve 410 is provided with a reverse one-way thread that matches 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 achieving connection and fixing.

[0096] Furthermore, a guide post 412 is inserted into the second cylinder sleeve 410, one end of which extends in the radial direction of the lower tube body 120 toward the direction close to the lower tube body 120 and is slidably embedded in a guide groove provided on the outer wall of the lower tube body 120, and both ends of the guide groove extend in the axial direction of the lower tube body 120, so that the guide post 412 can slide in the guide groove along the axial direction of the lower tube body 120, thereby connecting the second cylinder sleeve 410 to the lower tube body 120. The mutual cooperation between the guide groove and the guide post 412 can limit the movable distance of the second cylinder sleeve 410 relative to the lower tube body 120. Before the unsealing is completed, the guide post 412 can It is engaged with one end of the guide groove close to the upper tube body 110, so as to maintain the extrusion state of the upper sealing rubber tube 800 and the lower sealing rubber tube 900. When the unsealing is completed, the upper tube body 110 and the lower tube body 120 are driven to move relative to the first sealing part 200, the anchoring part 300 and the second sealing part 400 until the guide column 412 is engaged with one end of the guide groove away from the upper tube body 110, so as to ensure that the extrusion state of the upper sealing rubber tube 800 and the lower sealing rubber tube 900 is released while avoiding the first sealing part 200, the anchoring part 300 and the second sealing part 400 from being completely separated from the upper tube body 110 and the lower tube body 120.

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

[0098] Specifically, the third cylinder sleeve 510 is coaxially slidably sleeved on the outer periphery of the lower tube body 120, and one end of the third cylinder sleeve 510 close to the second cylinder sleeve 410 is covered on one end of the second cylinder sleeve 410 close to the third cylinder sleeve 510 and fixedly connected to each other. There are gaps between the inner wall of the end of the third cylinder sleeve 510 close to the second cylinder sleeve 410, the outer wall of the end of the second cylinder sleeve 410 close to the third cylinder sleeve 510, and the outer wall of the bottom end of the lower tube 120, so that a blocking cavity is formed by the inner wall of the end of the third cylinder sleeve 510 close to the second cylinder sleeve 410, the outer wall of the end of the second cylinder sleeve 410 close to the third cylinder sleeve 510, and the outer wall of the bottom end of the lower tube 120. The first locking ring 520 is arranged in the blocking cavity and sleeved on the outer periphery of the lower tube 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 tube 120 is provided with a one-way thread that matches the one-way thread on the inner wall of the first locking ring 520. The inner wall of the first locking ring 520 is threadedly connected with the outer wall of the lower tube 120, thereby achieving one-way locking. The lock cylinder 530 is slidably inserted in the blocking cavity, and the inner wall of one end of the lock cylinder 530 inserted in the blocking cavity is covered on the outer wall of the first lock ring 520, and a plurality of unlocking protrusions 521 are evenly arranged on the outer wall of the first lock ring 520 along the axial direction of the lower tube body 120, and a plurality of unlocking grooves 531 are evenly arranged on the inner wall of one end of the lock cylinder 530 inserted in the blocking cavity along the axial direction of the lower tube body 120. The plurality of unlocking protrusions 521 correspond to the plurality of unlocking grooves 531 one by one, and each corresponding group of unlocking protrusions 521 and unlocking grooves 531 are staggered. When the multiple unlocking grooves 531 of the lock cylinder 530 and the multiple unlocking protrusions 521 of the first lock ring 520 are staggered, the inner wall of the lock cylinder 530 abuts against the multiple unlocking protrusions 521 of the first lock ring 520, thereby pressing the first lock ring 520 against the outer peripheral wall of the lower tube body 120, so that the first lock ring 520 is firmly clamped against the outer wall of the lower tube body 120. When the lock cylinder 530 is driven to move along the axial direction of the lower tube 120 until the multiple unlocking grooves 531 of the lock cylinder 530 are arranged one by one opposite to the multiple unlocking protrusions 521 of the first lock ring 520, the unlocking protrusion 521 can be driven to embed into the unlocking groove 531 under the elastic force of the first lock ring 520 until the unlocking groove 531 completely accommodates the unlocking protrusion 521, thereby realizing the expansion of the first lock ring 520, making the first lock ring 520 away from the lower tube 120, and the one-way thread on the inner wall of the first lock ring 520 will also be away from the one-way thread on the outer wall of the lower tube 120, thereby releasing the clamping. In order to facilitate the unsealing operation, improve the unsealing efficiency, quickly complete the unsealing, facilitate replacement and maintenance, and avoid affecting the normal operation of the air energy storage system.

[0099] Furthermore, when the inner wall of the first locking ring 520 is threadedly connected to the outer wall of the lower tube body 120 to achieve one-way locking, the end of the second cylinder sleeve 410 close to the third cylinder sleeve 510 abuts against the end of the first locking ring 520 close to the second cylinder sleeve 410. Therefore, when the first locking ring 520 is engaged with the lower tube body 120, the first locking ring 520 can be fixed in position and supported below the second cylinder sleeve 410, thereby ensuring that the multiple components of the first sealing part 200, the anchoring part 300 and the second sealing part 400 are firmly arranged.

[0100] Furthermore, the outer wall of the lock cylinder 530 and the inner wall of the third cylinder sleeve 510 are connected by a sixth pin, so as to avoid mis-sealing. When unsealing is required, the lock cylinder 530 is driven to move so as to cut the sixth pin.

[0101] In some specific embodiments of the present invention, referring to Figure 5 The end of the second sealing part 400 away from the lower sealing rubber cylinder 900 extends along the axial direction of the blocking cavity and is inserted into the blocking cavity. The outer wall of the end of the second sealing part 400 inserted into the blocking cavity is provided with a stop step 411, and the inner wall of the end of the lock cylinder 530 inserted into the blocking cavity is provided with a hook 532, and the stop step 411 and the hook 532 are adapted to each other. Specifically, a protruding structure is provided on the outer wall of one end of the second cylinder sleeve 410 close to the third cylinder sleeve 510, thereby forming a back-stop step 411 on the outer wall of one end of the second cylinder sleeve 410 close to the third cylinder sleeve 510, and a hook claw 532 is provided on the inner wall of one end of the lock cylinder 530 inserted in the blocking cavity. When the lock cylinder 530 is driven to move until the multiple unlocking grooves 531 of the lock cylinder 530 are arranged one by one opposite to the multiple unlocking protrusions 521 of the first locking ring 520, the hook claw 532 of the lock cylinder 530 can be engaged with the back-stop step 411 of the second cylinder sleeve 410, thereby ensuring the stability of maintaining the unlocked state.

[0102] In some specific embodiments of the present invention, referring to Figure 5 The end of the third cylinder sleeve 510 away from the second sealing portion 400 is provided with a connecting ring 540 for connecting the lower joint 700. The lower joint 700 can be fixedly sleeved through the bottom of the connecting ring 540, so as to facilitate the connection of underground equipment. In addition, the end of the connecting ring 540 close to the lock cylinder 530 extends along the axial direction of the lock cylinder 530 in the direction close to the lock cylinder 530 and abuts against the end of the lock cylinder 530 away from the blocking chamber, so that the connecting ring 540 can be supported below the lock cylinder 530 to ensure the stability of the lock cylinder 530.

[0103] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dual-stage sealing injection and production packer, characterized in that: include: The injection and extraction part (100) is arranged along the axial direction of the casing, and an injection and extraction channel is opened therein. A first sealing part (200), an anchoring part (300), a second sealing part (400) and a blocking part (500) are sequentially slidably sleeved on the outer circumference of the injection and extraction part (100); One end of the first sealing part (200) is abutted against an upper sealing rubber cylinder (800), and one side is communicated with the injection and extraction channel, and the first sealing part (200) is driven by hydraulic pressure to slide and squeeze the upper sealing rubber cylinder (800); One end of the second sealing part (400) is abutted against a lower sealing rubber cylinder (900), and one side is communicated with the injection and extraction channel, and the second sealing part (400) is driven by hydraulic pressure to slide and squeeze the lower sealing rubber cylinder (900); The anchoring portion (300) is provided with a slip (330), and one end of the slip (330) is connected to an end of the first sealing portion (200) away from the upper sealing rubber cylinder (800); A blocking cavity is provided between one side of the blocking portion (500) and the injection and extraction portion (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 and extraction part (100), and the other side of the first locking ring (520) is provided with a plurality of unlocking protrusions (521); A lock cylinder (530) is also slidably disposed in the blocking cavity, and a plurality of unlocking grooves (531) are disposed on one side of the lock cylinder (530), and the plurality of unlocking protrusions (521) correspond one to one with the plurality of unlocking grooves (531); When the unlocking protrusion (521) and the unlocking groove (531) are arranged opposite to each other, the first locking ring (520) drives the unlocking protrusion (521) to be embedded in the unlocking groove (531).

2. The dual-stage sealing injection-production packer according to claim 1, characterized in that: The injection and extraction part (100) comprises: An upper tube body (110), wherein the first sealing portion (200) is slidably sleeved on the outer periphery of the upper tube body (110); A first protrusion is provided on the outer periphery of the upper tube body (110), and one end of the first protrusion abuts against one end of the upper sealing rubber tube (800) away from the first sealing portion (200); A lower tube body (120), the top end of the lower tube body (120) is connected to the bottom end of the upper tube body (110), and the second sealing portion (400) is slidably sleeved on the outer periphery of the lower tube body (120); A second protrusion is provided on the outer periphery of the lower tube body (120), and one end of the second protrusion abuts against one end of the lower sealing rubber tube (900) away from the second sealing portion (400).

3. The dual-stage sealing injection and production packer according to claim 2, characterized in that: The first sealing portion (200) comprises: A first cylinder sleeve (210) is slidably sleeved on the outer circumference of the upper tube body (110), and one end of the first cylinder sleeve is connected to one end of the anchoring portion (300); An upper rubber cylinder seat (220) is slidably sleeved on the outer periphery of the upper tube body (110), one end of which is connected to an end of the first cylinder sleeve (210) away from the anchoring portion (300), and the other end of which is in contact with an end of the upper sealing rubber cylinder (800) away from the first protrusion; 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) together form an upper piston chamber, and the upper piston chamber is communicated with the injection and production channel; An upper piston cylinder (230) is disposed in the upper piston cavity and is clamped with the upper rubber cylinder seat (220).

4. The dual-stage sealing injection-production packer according to claim 2, characterized in that: The anchoring portion (300) comprises: A first pushing ring (310) is slidably sleeved on the outer circumference of the upper tube body (110), and one end of the first pushing ring (310) is connected to the first sealing portion (200) away from the upper sealing rubber cylinder (800); A second push ring (320) is slidably sleeved on the outer periphery of the upper tube body (110) opposite to the first push ring (310); The slip (330) is disposed between the first push ring (310) and the second push ring (310).

5. The dual-stage sealing injection and production packer according to claim 4, characterized in that: One end of the second protrusion extends along the axial direction of the upper tube body (110) in a direction close to the second push ring (320) and is connected to an end of the second push ring (320) away from the slip (330).

6. The dual-stage sealing injection-production packer according to claim 4, characterized in that: The outer side of one end of the first push ring (310) close to the slip (330) is provided with a first upper conical surface (312), a second upper conical surface (313) and a third upper conical surface (314) in sequence from top to bottom; The inner side of one end of the slip (330) close to the first push ring (310) is provided with a first auxiliary upper conical surface, a second auxiliary upper conical surface and a third auxiliary upper conical surface in sequence from top to bottom; The first upper conical surface (312), the second upper conical surface (313) and the third upper conical surface (314) are inlaid with the first auxiliary upper conical surface, the second auxiliary upper conical surface and the third auxiliary upper conical surface in a one-to-one correspondence; The outer side of one end of the second push ring (320) close to the slip (330) is provided with a first lower conical surface (322), a second lower conical surface (323) and a third lower conical surface (324) in sequence from bottom to top; The inner side of one end of the slip (330) close to the second push ring (320) is provided with a first auxiliary lower conical surface (331), a second auxiliary lower conical surface (332) and a third auxiliary lower conical surface (333) in sequence from bottom to top; The first lower conical surface (322), the second lower conical surface (323) and the third lower conical surface (324) are engaged with the first auxiliary lower conical surface (331), the second auxiliary lower conical surface (332) and the third auxiliary lower conical surface (333) in a one-to-one correspondence.

7. The dual-stage sealing injection-production packer according to claim 2, characterized in that: The second sealing portion (400) comprises: A second cylinder sleeve (410) is slidably sleeved on the outer circumference of the lower tube body (120), one end of which 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 tube body (120), one end of which is connected to an end of the second cylinder sleeve (410) away from the blocking portion (500), and the other end of which is in contact with an end of the upper sealing rubber cylinder (800) away from the second protrusion; 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 tube body (120) together form a lower piston chamber, and the lower piston chamber is communicated with the injection and production channel; The lower piston cylinder (430) is disposed in the lower piston cavity and is clamped with the lower rubber cylinder seat (420).

8. The dual-stage sealing injection-production packer according to claim 2, characterized in that: The blocking portion (500) comprises: A third cylinder sleeve (510) is slidably sleeved on the outer circumference of the lower tube body (120), one end of which is connected to an end of the second sealing portion (400) 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 portion (400) and the outer wall of the bottom end of the lower tube body (120) together enclose the blocking chamber; The lock cylinder (530) is slidably inserted in the blocking cavity, and one end of the lock cylinder (530) away from the blocking cavity is exposed in the injection and extraction channel; A plurality of unlocking grooves (531) are evenly arranged on the inner wall of one end of the lock cylinder (530) inserted into the blocking cavity.

9. The dual-stage sealing injection-production packer according to claim 8, characterized in that: One end of the second sealing portion (400) away from the lower sealing rubber cylinder (900) extends along the axial direction of the sealing cavity and is inserted into the sealing cavity; The outer wall of one end of the second sealing portion (400) inserted in the blocking cavity is provided with a back-stop step (411), and the inner wall of one end of the lock cylinder (530) inserted in the blocking cavity is provided with a hook claw (532), and the back-stop step (411) and the hook claw (532) are adapted to each other.

10. The dual-stage sealing injection-production packer according to claim 8, characterized in that: A connecting ring (540) is provided at one end of the third cylinder sleeve (510) away from the second sealing portion (400); One end of the connecting ring (540) extends along the axial direction of the lock cylinder (530) in a direction close to the lock cylinder (530) and abuts against one end of the lock cylinder (530) away from the blocking cavity.

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