Hanging packer

Abstract

The utility model discloses a suspension packer, which relates to the technical field of packers, and is characterized in that the suspension packer comprises a central pipe, a rubber sleeve, two hard outburst prevention rings, a fixed pressure applying component, a sliding pressure applying component and a hydraulic cylinder component, and the two hard outburst prevention rings are respectively fixed on two sides of the rubber sleeve; two end surfaces of the rubber sleeve are symmetrically arranged conical surfaces, and one sides, deviating from the central pipe, of the two conical surfaces are inclined towards a direction close to each other; the two sides, deviating from each other, of the two hard outburst prevention rings are symmetrical conical surfaces, and the sides, deviating from the central pipe, of the two conical surfaces incline towards the direction close to each other; the two end faces, close to each other, of the fixed pressing assembly and the sliding pressing assembly are perpendicular to the axis of the center pipe. Through the hard outburst prevention ring, the extruded rubber sleeve is supported in an auxiliary manner, and the conical surface design of the rubber sleeve is matched, so that the deformation of the two ends of the rubber sleeve is reduced, the pressure distribution at the contact part of the rubber sleeve and the well wall is more uniform, the setting stability of the packer is favorably improved, and the service life of the packer is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of packers, and more specifically, to a suspension packer. Background Art

[0002] Open hole staged fracturing and acidizing is a method of increasing the production of oil or gas wells, mainly suitable for situations where the oil or gas layer has poor permeability and low production capacity. In the case of deep wells and complex geological conditions, it is generally necessary to use a packer to seal each open hole section before fracturing and acidizing to prevent fracturing fluid or acid from flowing from one section to another, reduce the waste of fracturing fluid or acid, and improve operation efficiency and construction quality.

[0003] Chinese patent CN113250647A discloses a suspension completion integrated packer, which includes a coaxially connected setting mechanism, a tie-back tube, a release mechanism and a setting mechanism, the setting mechanism includes a setting center pipe, a setting assembly, a first setting cylinder sleeve and a first annular setting piston, the setting mechanism includes a setting center pipe, a thrust sleeve, a start shear fixture and a setting seal assembly, and the release mechanism includes a release spring lock tube, a release lock head, a release shear fixture and a release assembly. The setting mechanism is located at the upper part of the suspension packer, has independence, and can realize independent setting in the open hole segmented tubing string, so that the functions of other tools in the open hole segmented completion tubing string are not affected, and the setting pressure will not act on the differential pressure sleeve, avoiding the differential pressure sleeve from opening in advance.

[0004] This patent applies pressure to the two ends of the rubber cylinder through two planes perpendicular to the axis of the rubber cylinder. During the deformation of the rubber cylinder, the parts of the two ends of the rubber cylinder that extend outside the two planes tend to bulge in the direction parallel to the axis of the rubber cylinder, resulting in reduced sealing stability and the rubber cylinder is more susceptible to collision damage.

[0005] Based on the above reasons, the utility model hopes to provide a suspension packer with higher rubber tube setting stability and reliability starting from the stability of the rubber tube. Utility Model Content

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hanging packer, including a center tube, a rubber tube, a hard anti-burst ring, a fixed pressure assembly, a sliding pressure assembly and a hydraulic cylinder assembly, wherein the rubber tube, the hard anti-burst ring, the fixed pressure assembly, the sliding pressure assembly and the hydraulic cylinder assembly are all sleeved on the center tube. The rubber tube can slide on the center tube, two hard anti-burst rings are fixed on both sides of the rubber tube, the fixed pressure assembly and the sliding pressure assembly are respectively located on the two sides of the two hard anti-burst rings that are away from each other, the fixed pressure assembly is fixed on the axis of the center tube, and the hydraulic cylinder assembly is used to push the sliding pressure assembly toward the fixed pressure assembly.

[0007] The inner and outer sides of the rubber cylinder are both cylindrical surfaces that are colinear with the axis of the central tube. The two end surfaces of the rubber cylinder are symmetrically arranged conical surfaces, and the two conical surfaces are inclined in the direction of approaching each other on the side away from the central tube. Each hard anti-burst ring is attached to the end of the outer side of the rubber cylinder and the conical surface of the rubber cylinder corresponding to it. The two sides of the two hard anti-burst rings that are away from each other are symmetrical conical surfaces, and the two conical surfaces are inclined in the direction of approaching each other on the side away from the central tube. The two end surfaces of the fixed pressure component and the sliding pressure component that are close to each other are perpendicular to the axis of the central tube.

[0008] The utility model is further configured to include a stop-recession assembly, which includes a stop-recession piece and a stop-recession seat. The stop-recession piece is connected to the output end of the hydraulic cylinder assembly, and the stop-recession seat is fixed on the outside of the central tube. The stop-recession piece and the stop-recession seat cooperate with each other, and the stop-recession piece can only move on the stop-recession seat in the direction close to the fixed pressure assembly.

[0009] The utility model is further configured as follows: the anti-retraction seat is an elastic anti-retraction seat, which is tightly matched with the anti-retraction piece.

[0010] The utility model is further configured as follows: the rubber cylinder is composed of a first cylinder and two second cylinders, the first cylinder is located between the two second cylinders and fits tightly with the two second cylinders, and the two conical surfaces of the rubber cylinder are two end surfaces of the two second cylinders that are away from each other.

[0011] The utility model is further configured as follows: both end surfaces of the first cylinder are symmetrically arranged conical surfaces, and the two conical surfaces are inclined in a direction of approaching each other on one side away from the central tube.

[0012] The utility model is further configured such that: the angle between the conical surface of the hard anti-burst ring away from the rubber tube and the axis of the central tube is greater than the angle between the conical surface of the rubber tube and the axis of the central tube.

[0013] The utility model is further configured as follows: the sliding pressure assembly includes a first cone ring, a first slip, a support ring and a protective sleeve. The support ring is sleeved on the central tube and can slide linearly on the central tube, and the first slip is sleeved and fixed on the support ring. The first cone ring is located between the rubber tube and the support ring, and the end of the first cone ring away from the rubber tube is a cone surface, and the end of the cone surface away from the rubber tube shrinks inward. The protective sleeve is located between the central tube and the first slip, and between the first cone ring and the support ring; after the rubber tube is sealed, the protective sleeve is deformed or cracked, and then the first cone ring is wedged into the first slip.

[0014] The utility model is further configured as follows: the fixed pressure assembly includes a second cone ring and a second slip. The second slip is sleeved on the central tube, and its position on the axis of the central tube is fixed. The second cone ring is located between the second slip and the rubber tube, and the end of the second cone ring away from the rubber tube is a cone surface, and the cone surface is inwardly contracted away from the end of the rubber tube. The second cone ring is used to wedge the second slip.

[0015] The utility model is further configured to include: a first protection pin, which passes through the first cone ring and is inserted into the central tube wall, and the shear fracture of the first protection pin occurs before the protection sleeve is deformed or cracked.

[0016] The utility model is further configured to include: a second protection pin, which passes through the second cone ring and is inserted into the central tube wall. The shear fracture of the first protection pin occurs at the shear strength of the second protection pin, and the shear fracture of the second protection pin occurs before the protection sleeve is deformed or cracked.

[0017] The utility model is further configured as follows: the second slip is fixed relative to the central tube.

[0018] The utility model is further configured as follows: the hydraulic cylinder assembly includes a lower joint, an isolating sleeve and a first cylinder body, the lower joint is sleeved and fixed on the central tube, the isolating sleeve is sleeved and slidably sealed on the lower joint, the first cylinder body is sleeved on the central tube and linearly slides on the central tube, and the end thereof away from the sliding pressure assembly is between the isolating sleeve and the central tube. A first hydraulic chamber is formed between the lower joint, the isolating sleeve, the first cylinder body and the central tube, and a first injection hole connected to the first hydraulic chamber is provided on the central tube. One end of the first cylinder body close to the sliding pressure assembly is used to push the sliding pressure assembly toward the fixed pressure assembly.

[0019] The utility model is further configured as follows: the hydraulic cylinder assembly also includes a starting pin, the starting pin passes through the isolation sleeve and connects to the lower joint, and after the pressure in the first hydraulic chamber meets the shearing requirement of the starting pin, the isolation sleeve slides.

[0020] The utility model is further configured as follows: the hydraulic cylinder assembly also includes a fixed sleeve and a second cylinder body, the fixed sleeve is sleeved and fixed on the central tube, is located in the first cylinder body and is slidably sealed with the first cylinder body. The second cylinder body is sleeved on the central tube, and one end of the second cylinder body close to the fixed sleeve is between the first cylinder body and the central tube, and a second hydraulic chamber is formed between the fixed sleeve, the first cylinder body, the second cylinder body, and the central tube, and a second injection hole connected to the second hydraulic chamber is opened on the central tube. One end of the second cylinder body close to the sliding pressure assembly is used to push the sliding pressure assembly toward the fixed pressure assembly.

[0021] The utility model is further configured as follows: the liquid cylinder assembly further comprises a protection ring, the protection ring is sleeved and fixed on the lower joint, and the protection ring is located on a side of the isolation sleeve away from the rubber cylinder.

[0022] To sum up, compared with the prior art, the utility model has the following beneficial effects: the utility model provides auxiliary support for the squeezed rubber sleeve through the hard anti-burst ring, and cooperates with the conical surface design of the rubber sleeve to reduce the deformation of the two ends of the rubber sleeve, so that the pressure distribution at the contact point between the rubber sleeve and the well wall is more uniform, which helps to improve the sealing stability of the packer and extend the service life of the packer. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the embodiment;

[0024] Figure 2 It is a partial schematic diagram showing the structure of the rubber cartridge;

[0025] Figure 3 It is a schematic diagram of the local structure of the hydraulic cylinder assembly.

[0026] In the figure: 1, center tube; 21, first cylinder; 22, second cylinder; 3, hard anti-burst ring; 41, second slip; 42, second cone ring; 43, anti-rotation ring; 44, second protection pin; 51, protection sleeve; 52, first cone ring; 53, first protection pin; 54, first slip; 55, support ring; 611, lower joint; 612, first cylinder; 613, isolation sleeve; 621, second cylinder; 622, fixing sleeve; 63, starting pin; 64, protection ring; 71, backstop seat; 72, backstop piece; 73, locking sleeve. DETAILED DESCRIPTION

[0027] The technical solution of the utility model will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0028] It should be noted that the terms "center", "up", "down", "horizontal", "left", "right", "front", "back", "lateral", "longitudinal", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0029] Example

[0030] like Figure 1-3 As shown, the utility model provides a suspension packer, which includes a center pipe 1, a rubber cylinder, a hard anti-burst ring 3, a fixed pressure assembly, a sliding pressure assembly and a hydraulic cylinder assembly, wherein the rubber cylinder, the hard anti-burst ring 3, the fixed pressure assembly, the sliding pressure assembly and the hydraulic cylinder assembly are all sleeved on the center pipe 1. The rubber cylinder can slide on the center pipe 1, two hard anti-burst rings 3 are fixed on both sides of the rubber cylinder, the fixed pressure assembly and the sliding pressure assembly are respectively located on two sides of the two hard anti-burst rings 3 that are away from each other, the fixed pressure assembly is fixed on the axis of the center pipe 1, and the hydraulic cylinder assembly is used to push the sliding pressure assembly toward the fixed pressure assembly.

[0031] The inner and outer side surfaces of the rubber sleeve are both cylindrical surfaces that are colinear with the axis of the center tube 1, and the two end surfaces of the rubber sleeve are symmetrically arranged conical surfaces, and the two conical surfaces are inclined in the direction of approaching each other on the side away from the center tube 1. Each hard anti-burst ring 3 is in contact with the corresponding outer side end of the rubber sleeve and the conical surface of the rubber sleeve. The two sides of the two hard anti-burst rings 3 that are away from each other are symmetrical conical surfaces, and the two conical surfaces are inclined in the direction of approaching each other on the side away from the center tube 1. The two end surfaces of the fixed pressure component and the sliding pressure component that are close to each other are perpendicular to the axis of the center tube 1. The hard anti-burst ring 3 is used to provide auxiliary support for the squeezed rubber sleeve, and the conical surface design of the rubber sleeve is combined with the rubber sleeve to reduce the deformation of the two ends of the rubber sleeve, so that the pressure distribution at the contact between the rubber sleeve and the well wall is more uniform, which helps to improve the sealing stability of the packer and extend the service life of the packer.

[0032] Specifically, the rubber cylinder is composed of a first cylinder 21 and two second cylinders 22. The first cylinder 21 is located between the two second cylinders 22 and fits tightly with the two second cylinders 22 to improve the bearing capacity of the rubber cylinder and further improve the stability of the packer. The two conical surfaces of the rubber cylinder are the two end surfaces of the two second cylinders 22 that are opposite to each other.

[0033] Specifically, both end surfaces of the first cylinder 21 are also symmetrically arranged conical surfaces, and the two conical surfaces are inclined toward each other on the side away from the central pipe 1, so that the pressure distribution at the contact point between the first cylinder 21 and the well wall is more uniform.

[0034] Specifically, the angle between the conical surface of the hard anti-burst ring 3 away from the rubber tube and the axis of the central tube 1 is greater than the angle between the conical surface of the rubber tube and the axis of the central tube 1. Along the radial direction of the hard anti-burst ring 3, the farther the distance from the central tube 1 is, the greater the support force provided by the hard anti-burst ring 3 to the rubber tube, thereby improving the support effect of the hard anti-burst ring 3 on the rubber tube.

[0035] Specifically, the hydraulic cylinder assembly includes a lower joint 611, an isolation sleeve 613 and a first cylinder body 612. The lower joint 611 is sleeved and fixed on the central tube 1. The isolation sleeve 613 is sleeved and slidably sealed on the lower joint 611. The first cylinder body 612 is sleeved on the central tube 1 and slides linearly on the central tube 1. The end of the first cylinder body 612 away from the sliding pressure assembly is between the isolation sleeve 613 and the central tube 1. A first hydraulic chamber is formed between the lower joint 611, the isolation sleeve 613, the first cylinder body 612 and the central tube 1. A first injection hole connected to the first hydraulic chamber is provided on the central tube 1. The first cylinder body 612 is close to one end of the sliding pressure assembly and is used to push the sliding pressure assembly toward the fixed pressure assembly.

[0036] Specifically, the cylinder assembly further includes a starting pin 63, which passes through the isolation sleeve 613 and connects to the lower joint 611. The starting pressure of the first cylinder body 612 of the cylinder is limited by the shear strength of the starting pin 63 to avoid the misstart of the first cylinder body 612. In this embodiment, a plurality of starting pins 63 are provided, and all starting pins 63 are distributed circumferentially around the axis of the central tube 1.

[0037] Specifically, the hydraulic cylinder assembly also includes a fixed sleeve 622 and a second cylinder body 621. The fixed sleeve 622 is sleeved and fixed on the central tube 1, and is located in the first cylinder body 612 and is slidably sealed with the first cylinder body 612. The second cylinder body 621 is sleeved on the central tube 1, and one end of the second cylinder body 621 close to the fixed sleeve 622 is between the first cylinder body 612 and the central tube 1. The fixed sleeve 622, the first cylinder body 612, the second cylinder body 621, and the central tube 1 form a second hydraulic chamber, and the central tube 1 is provided with a second injection hole connected to the second hydraulic chamber. The second cylinder body 621 is close to one end of the sliding pressure assembly, and is used to push the sliding pressure assembly toward the fixed pressure assembly. With the help of the segmented pressure of the first hydraulic chamber and the second hydraulic chamber, the stability of the hydraulic drive is improved.

[0038] Specifically, the hydraulic cylinder assembly also includes a protective ring 64, which is sleeved and fixed on the lower joint 611. The protective ring 64 is located on the side of the isolation sleeve 613 away from the rubber cylinder, and is used to limit the position of the isolation sleeve 613, so that there is a gap between the first cylinder body 612 and the lower joint 611, and there is a gap between the second cylinder body 621 and the fixed sleeve 622, so as to facilitate the injection of fluid into the first hydraulic chamber and the second hydraulic chamber for pressurization.

[0039] The present embodiment also includes a backstop assembly, which includes a backstop piece 72 and a backstop seat 71. The backstop piece 72 is relatively fixed to the second cylinder body 621, and the backstop seat 71 is fixed to the outside of the central tube 1. The backstop piece 72 and the backstop seat 71 cooperate with each other. The backstop seat 71 is provided with a ratchet that cooperates with the backstop piece 72. Under the limitation of the ratchet, the backstop piece 72 can only move on the backstop seat 71 in the direction close to the fixed pressure assembly, thereby effectively preventing the second cylinder body 621 from retreating.

[0040] Specifically, the anti-retraction assembly also includes a locking sleeve 73 sleeved on the central tube 1 , the locking sleeve 73 is inserted between the second cylinder body 621 and the central tube 1 and fixedly connected to the second cylinder body 621 , and the anti-retraction member 72 is fixedly connected to the locking sleeve 73 .

[0041] Specifically, the anti-recoil seat 71 is an elastic anti-recoil seat, which includes a ratchet and a spring. The spring is located between the ratchet and the center tube 1, so that the ratchet and the anti-recoil member 72 fit tightly, which not only has the effect of preventing retreat, but also is not easy to cause the wall of the second cylinder body 621 to jump, which helps to protect the second cylinder body 621.

[0042] Specifically, the sliding pressure assembly includes a first cone ring 52, a first slip 54, a support ring 55 and a protective sleeve 51. The support ring 55 is sleeved on the central tube 1, and the end of the support ring 55 away from the rubber tube is inserted between the locking sleeve 73 and the central tube 1, and is fixedly connected to the locking sleeve 73. The first slip 54 is sleeved and fixed on the support ring 55. The first cone ring 52 is located between the rubber tube and the support ring 55, and the end of the first cone ring 52 away from the rubber tube is a cone surface, and the end of the cone surface away from the rubber tube shrinks inward. The protective sleeve 51 is located between the central tube 1 and the first slip 54, and between the first cone ring 52 and the support ring 55. As the distance between the fixed pressure assembly and the first cone ring 52 is shortened, the force on the protective sleeve 51 increases, and the rubber tube is deformed and pressed against the well wall. After the force on the protective sleeve 51 meets the requirements, the protective sleeve 51 is deformed or cracked, and then the first cone ring 52 is wedged into the first slip 54, and the position of the first cone ring 52 on the central tube 1 is locked by friction.

[0043] Specifically, the fixed pressure assembly includes a second conical ring 42 and a second slip 41. The second slip 41 is sleeved on the central tube 1, and its position on the axis of the central tube 1 is fixed. The second conical ring 42 is located between the second slip 41 and the rubber tube, and the end of the second conical ring 42 away from the rubber tube is a conical surface, and the conical surface is inwardly contracted away from the end of the rubber tube. The second conical ring 42 is used to wedge into the second slip 41, and the position of the second conical ring 42 on the central tube 1 is locked by friction.

[0044] This embodiment further includes a first protection pin 53, which passes through the first cone ring 52 and is inserted into the wall of the central tube 1. The starting pressure of the first cone ring 52 is limited by the shear strength of the first protection pin 53 to avoid misstarting of the first cone. In this embodiment, a plurality of first protection pins 53 are provided, and all first protection pins 53 are distributed circumferentially around the axis of the central tube 1.

[0045] This embodiment further includes a second protection pin 44, which passes through the second cone ring 42 and is inserted into the wall of the central tube 1. The shear strength of the second protection pin 44 limits the start-up pressure of the second cone ring 42 to avoid misstarting of the second cone ring 42. In this embodiment, a plurality of the second protection pins 44 are provided, and all the second protection pins 44 are distributed circumferentially around the axis of the central tube 1.

[0046] Specifically, the second slip 41 is fixed relative to the central tube 1, so that the rubber cylinder is relatively fixed to the central tube 1 after setting, thereby improving the stability of setting. In this embodiment, the fixed pressure assembly also includes an anti-rotation ring 43, which is sleeved and fixed on the central tube 1, and the second slip 41 is fixedly connected to the anti-rotation ring 43.

[0047] When this embodiment is used, the "drill pipe + matching delivery tool + the above-mentioned suspension packer + lower acid fracturing pipe string + sealing ball seat" is assembled and sent to the bottom of the well. The ball is thrown to press and seal the above-mentioned suspension packer: the fluid first enters the first hydraulic chamber, pushing the first cylinder 612 to move left, the first cylinder 612 moves left with the isolation sleeve 613, and presses and cuts the start pin 63. The fluid enters the second hydraulic chamber, pushing the second cylinder 621 to move left, the second cylinder 621 pushes the locking sleeve 73 to move left, the stop member 72 and the stop seat 71 cooperate with each other to prevent the locking sleeve 73 and the second cylinder 621 from moving back to the right. Continue to increase the pressure in the first hydraulic chamber and the second hydraulic chamber, the locking sleeve 73 moves to the left to cut off the first protection pin 53, the first cone ring 52 moves to the left to squeeze the rubber cylinder, the rubber cylinder moves to squeeze the second cone ring 42, and when the second cone ring 42 is squeezed to meet the shear strength of the second protection pin 44, the second protection pin 44 is cut off, and the second slip 41 is completely seated. Continue to increase the pressure in the first hydraulic chamber and the second hydraulic chamber to make the rubber cylinder completely seated, then the protection sleeve 51 is deformed or cracked, and the second slip 41 crawls and sits along the conical surface of the second cone ring 42.

[0048] In summary, this embodiment uses the hard anti-burst ring 3 to provide auxiliary support for the squeezed rubber sleeve, and cooperates with the conical surface design of the rubber sleeve to reduce the deformation of the two ends of the rubber sleeve, so that the pressure distribution at the contact between the rubber sleeve and the well wall is more uniform, which helps to improve the sealing stability of the packer and extend the service life of the packer.

[0049] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A suspension packer, characterized in that: It comprises a central tube (1), a rubber cylinder, a hard anti-burst ring (3), a fixed pressure component, a sliding pressure component and a hydraulic cylinder component. The rubber cylinder, the hard anti-burst ring (3), the fixed pressure component, the sliding pressure component and the hydraulic cylinder component are all sleeved on the central tube (1); the rubber cylinder can slide on the central tube (1), two hard anti-burst rings (3) are respectively fixed on both sides of the rubber cylinder, the fixed pressure component and the sliding pressure component are respectively located on two sides of the two hard anti-burst rings (3) that are away from each other, the fixed pressure component is fixed on the axis of the central tube (1), and the hydraulic cylinder component is used to push the sliding pressure component toward the fixed pressure component; The inner and outer side surfaces of the rubber cylinder are both cylindrical surfaces colinear with the axis of the central tube (1); the two end surfaces of the rubber cylinder are symmetrically arranged conical surfaces, and the two conical surfaces are inclined in a direction approaching each other on the side away from the central tube (1); each hard anti-burst ring (3) is in contact with the corresponding end of the outer side surface of the rubber cylinder and the conical surface of the rubber cylinder; the two sides of the two hard anti-burst rings (3) that are away from each other are symmetrical conical surfaces, and the two conical surfaces are inclined in a direction approaching each other on the side away from the central tube (1); the two end surfaces of the fixed pressure component and the sliding pressure component that are close to each other are both perpendicular to the axis of the central tube (1); The invention also comprises a stop-retraction assembly, wherein the stop-retraction assembly comprises a stop-retraction member (72) and a stop-retraction seat (71), wherein the stop-retraction member (72) is connected to the output end of the hydraulic cylinder assembly, and the stop-retraction seat (71) is fixed on the outer side of the central tube (1), and the stop-retraction member (72) and the stop-retraction seat (71) cooperate with each other, and the stop-retraction member (72) can only move on the stop-retraction seat (71) in a direction close to the fixed pressure assembly.

2. A suspension packer according to claim 1, characterized in that: The stop seat (71) is an elastic stop seat, which is tightly matched with the stop piece (72).

3. A suspension packer according to claim 1, characterized in that: The rubber cylinder is composed of a first cylinder (21) and two second cylinders (22); the first cylinder (21) is located between the two second cylinders (22) and fits tightly with the two second cylinders (22); the two conical surfaces of the rubber cylinder are respectively the two end surfaces of the two second cylinders (22) which are away from each other.

4. A suspension packer according to claim 3, characterized in that: The two end surfaces of the first cylinder (21) are symmetrically arranged conical surfaces, and the two conical surfaces are inclined in a direction approaching each other on the side away from the central tube (1).

5. A suspension packer according to claim 3, characterized in that: The angle between the conical surface of the hard anti-burst ring (3) away from the rubber cylinder and the axis of the central tube (1) is greater than the angle between the conical surface of the rubber cylinder and the axis of the central tube (1).

6. A suspension packer according to claim 1, characterized in that: The sliding pressure-applying assembly comprises a first cone ring (52), a first slip (54), a support ring (55) and a protective sleeve (51); the support ring (55) is sleeved on the center tube (1) and can slide linearly on the center tube (1), and the first slip (54) is sleeved on and fixed on the support ring (55); the first cone ring (52) is located between the rubber tube and the support ring (55), and the end of the first cone ring (52) away from the rubber tube is a cone surface, and the end of the cone surface away from the rubber tube shrinks inwardly; the protective sleeve (51) is located between the center tube (1) and the first slip (54), and between the first cone ring (52) and the support ring (55); after the rubber tube is sealed, the protective sleeve (51) is deformed or cracked, and then the first cone ring (52) is wedged into the first slip (54).

7. A suspension packer according to claim 6, characterized in that: The fixed pressure-applying assembly comprises a second conical ring (42) and a second slip (41); the second slip (41) is sleeved on the central tube (1) and its position on the axis of the central tube (1) is fixed; the second conical ring (42) is located between the second slip (41) and the rubber tube, and the end of the second conical ring (42) away from the rubber tube is a conical surface, and the conical surface is inwardly contracted away from the end of the rubber tube; the second conical ring (42) is used to wedge into the second slip (41).

8. A suspension packer according to claim 6 or 7, characterized in that: It also comprises a first protective pin (53), which passes through the first cone ring (52) and is inserted into the wall of the central tube (1), and the shear fracture of the first protective pin (53) occurs before the protective sleeve (51) is deformed or cracked.

9. A suspension packer according to claim 7, characterized in that: It also includes a second protective pin (44) and a first protective pin (53), wherein the second protective pin (44) passes through the second cone ring (42) and is inserted into the wall of the central tube (1), and the first protective pin (53) passes through the first cone ring (52) and is inserted into the wall of the central tube (1); the shear fracture of the first protective pin (53) occurs before the shear fracture of the second protective pin (44), and the shear fracture of the second protective pin (44) occurs before the protective sleeve (51) is deformed or cracked.

10. A suspension packer according to claim 7, characterized in that: The second slip (41) is fixed relative to the central pipe (1).

11. A suspension packer according to claim 1, characterized in that: The hydraulic cylinder assembly comprises a lower joint (611), an isolating sleeve (613) and a first cylinder body (612); the lower joint (611) is sleeved and fixed on the central tube (1); the isolating sleeve (613) is sleeved and slidably sealed on the lower joint (611); the first cylinder body (612) is sleeved on the central tube (1) and linearly slides on the central tube (1); one end of the first cylinder body away from the sliding pressure assembly is between the isolating sleeve (613) and the central tube (1); a first hydraulic chamber is formed between the lower joint (611), the isolating sleeve (613), the first cylinder body (612) and the central tube (1); a first injection hole connected to the first hydraulic chamber is provided on the central tube (1); one end of the first cylinder body (612) close to the sliding pressure assembly is used to push the sliding pressure assembly toward the fixed pressure assembly.

12. A suspension packer according to claim 11, characterized in that: The hydraulic cylinder assembly also includes a starting pin (63), which passes through the isolation sleeve (613) and connects to the lower joint (611). After the pressure in the first hydraulic chamber meets the shearing requirement of the starting pin (63), the isolation sleeve (613) slides.

13. A suspension packer according to claim 11, characterized in that: The hydraulic cylinder assembly further comprises a fixed sleeve (622) and a second cylinder body (621); the fixed sleeve (622) is sleeved and fixed on the central tube (1), and is located in the first cylinder body (612) and is slidably sealed with the first cylinder body (612); the second cylinder body (621) is sleeved on the central tube (1), and one end of the second cylinder body (621) close to the fixed sleeve (622) is between the first cylinder body (612) and the central tube (1); a second hydraulic chamber is formed between the fixed sleeve (622), the first cylinder body (612), the second cylinder body (621) and the central tube (1); a second injection hole connected to the second hydraulic chamber is provided on the central tube (1); one end of the second cylinder body (621) close to the sliding pressure assembly is used to push the sliding pressure assembly toward the fixed pressure assembly.

14. A suspension packer according to any one of claims 11 to 13, characterized in that: The cylinder assembly further comprises a protective ring (64), which is sleeved and fixed on the lower joint (611), and the protective ring (64) is located on a side of the isolation sleeve (613) facing away from the rubber cylinder.

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