Cylindrical slip type high-temperature and high-pressure permanent packer

Abstract

The utility model belongs to the technical field of packers, and particularly relates to a cylindrical slip type high-temperature and high-pressure permanent packer which comprises an upper connector and a mandrel, the inner surface of the mandrel is in threaded connection with the surface of the upper connector, and the surface of the upper connector is in threaded connection with an upper slip supporting sleeve. The surface of the upper connector is sleeved with a lower slip supporting cylinder, the surface of the upper connector is sleeved with a first inner locking slip and a second inner locking slip, the surface of the upper connector is sleeved with an upper cone and a lower cone, the surface of the mandrel is in threaded connection with a lower connector, the surface of the upper connector is sleeved with a sealing supporting sleeve, and the surface of the lower cone is sleeved with the sealing supporting sleeve. The first internal locking slip is meshed in an annular space between the lower slip supporting cylinder and the upper joint; by arranging a novel high-temperature and high-pressure sealing structure after the whole device is optimized and adding the supporting ring between the rubber barrels with inclination, the novel multi-stage barrel-shaped slip structure design can be used for coping with higher-temperature well conditions, so that the bearing strength of the packer is effectively improved, and the damage of the slip to a casing pipe is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of packer technology, specifically a cylindrical slip-type high-temperature and high-pressure permanent packer. Background Technology

[0002] A packer is an important downhole tool. A packer is a downhole tool that is connected to the downhole tubing string and used to seal the annular space between the tubing and the oil and gas well casing or open hole. Its main functions are to isolate the annular space above and below the packer, prevent the mixing of media, protect the safe operation of the pipeline system, and regulate fluid pressure.

[0003] Regarding the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: Packers are commonly used downhole equipment. Due to their structure, traditional packers can only be used in relatively common environments. When dealing with deep, high-temperature, and high-pressure oil and gas wells, traditional packers are prone to problems in sealing against high-temperature and high-pressure environments. Traditional permanent packer slips are prone to damaging the inner wall of the casing under high-temperature and high-pressure environments. Therefore, a cylindrical slip-type high-temperature and high-pressure permanent packer is proposed to address the above problems. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: A cylindrical slip-type high-temperature and high-pressure permanent packer of this utility model includes an upper connector and a mandrel. The inner surface of the mandrel and the surface of the upper connector are threadedly connected. A lower connector is threadedly connected to the surface of the upper connector. An upper slip support sleeve is threadedly connected to the surface of the upper connector. A first inner locking slip and a second inner locking slip are fitted onto the surface of the upper connector. An upper cone and a lower cone are fitted onto the surface of the upper connector. The lower connector is threadedly connected to the surface of the mandrel. A sealing support sleeve is fitted onto the surface of the upper connector. The sealing support sleeve is threadedly connected to the lower cone. The second inner locking slip is inserted into the surface of the sealing support sleeve, the upper connector, and the lower cone. The inner surface of the sealing support sleeve, the surface of the upper connector, and the second inner locking slip mesh with each other. The surface of the upper connector is fitted with a lower locking slip support cylinder. The first inner locking slip is inserted into the surface of the lower locking slip support cylinder and the upper connector. The inner surface of the lower locking slip support cylinder, the surface of the upper connector, and the surface of the first inner locking slip mesh with each other. The surface of the upper cone is provided with a slip assembly, which includes a cylindrical slip. The cylindrical slip is fitted onto the surface of the upper cone. A fixing bolt is inserted into the inner surface of the cylindrical slip. The fixing bolt and the inner wall of the cylindrical slip are threadedly connected by two screws.

[0006] Preferably, the inner walls of the lower cone and the upper connector are threaded with fixing pins, and the inner walls of the upper connector and the upper slip support sleeve are threaded with multiple anti-rotation pins.

[0007] Preferably, the surface of the upper connector is provided with a sealing assembly, the sealing assembly including two first sealing support rings, the two first sealing support rings being sleeved on the surface of the upper connector, and the two first sealing support rings being located on the side walls of the upper cone and the sealing support sleeve, respectively. A second sealing support ring is sleeved on the surface of the upper connector near the first sealing support ring, a first sealing ring is sleeved on the surface of the upper connector near the second sealing support ring, a fourth sealing ring is sleeved on the surface of the upper connector, two third sealing support rings are sleeved on both sides of the surface of the upper connector near the fourth sealing ring, a third sealing ring is sleeved on the surface of the upper connector near the third sealing support ring, and a second sealing ring is sleeved on the surface of the upper connector near the second sealing support ring and the third sealing ring, the second sealing ring being located on the side wall of the first sealing ring.

[0008] Preferably, the upper connector is fitted with a setting push sleeve, the setting push sleeve and the inner wall of the lower slip support cylinder are threadedly connected by a first pin, and the inner wall of the lower slip support cylinder is threadedly connected by a setting connecting sleeve.

[0009] Preferably, the upper connector is fitted with a protective sleeve, the surface of the protective sleeve is threadedly connected to the inner surface of the seat seal connecting sleeve, the piston is fitted on the surface of the mandrel, the surface of the piston is threadedly connected to the inner surface of the protective sleeve, the piston is inserted into the inner surface of the lower connector, the lower connector and the inner wall of the piston are threadedly connected with a plurality of second pins, and the surface of the mandrel is threadedly connected to the inner surface of the lower connector.

[0010] Preferably, the surface of the upper connector is provided with a sealing component, the sealing component including a first sealing ring, the first sealing ring being sleeved on the surface of the upper connector and inserted into the inner surface of the upper cone, a first retaining ring being sleeved on both sides of the surface of the upper connector near the first sealing ring, a second sealing ring being sleeved on the surface of the upper connector and inserted into the inner surface of the protective sleeve, and a second retaining ring being sleeved on both sides of the surface of the upper connector near the second sealing ring.

[0011] Preferably, a third sealing ring is fitted on the surface of the mandrel, the third sealing ring is inserted into the inner surface of the protective sleeve, and a third retaining ring is fitted on both sides of the mandrel surface near the third sealing ring. A fourth sealing ring is fitted on the surface of the mandrel, the fourth sealing ring is inserted into the inner surface of the piston, and a fourth retaining ring is fitted on both sides of the mandrel surface near the fourth sealing ring.

[0012] Preferably, a fifth sealing ring is fitted on the surface of the piston, the fifth sealing ring is inserted into the inner surface of the lower connector, and a fifth retaining ring is fitted on both sides of the piston surface near the fifth sealing ring.

[0013] The advantages of this utility model are:

[0014] When a packer is required, the upper slip support sleeve is connected to the external thread of the upper connector body. Then, the anti-rotation pin is rotated to the upper slip support sleeve and the outer wall of the upper connector. The slip assembly is installed in the groove of the upper slip support sleeve and is fixed by the upper slip support sleeve and the upper cone to prevent opening. The upper cone is installed on the outside of the upper connector and cooperates with the slip assembly. After the cylindrical slip is fitted on the surface of the upper connector, the fixing bolt is inserted into the inner wall of the cylindrical slip, and then the screw is rotated to the fixing bolt and the inner surface of the cylindrical slip. The sealing assembly is installed on the outside of the upper connector and is fixed in the designated position by the upper cone, the sealing support sleeve, the second inner locking slip, and the lower cone. The inner walls of the first sealing support ring, the second sealing support ring, the first sealing ring, the second sealing ring, the third sealing ring, the third sealing support ring, and the fourth sealing ring contact the smooth sealing surface of the outer wall of the upper connector to achieve sliding sealing.

[0015] The second inner locking slip combines with both the upper connector through its meshing structure and the inclined surface that contacts the sealing support sleeve.

[0016] The lower cone is installed on the outside of the upper connector and mates with the slip assembly; the slip assembly is installed in the groove of the lower slip support cylinder body and is tensioned and fixed to the lower cone through the lower slip support cylinder; the lower slip support cylinder is sleeved on the outside of the upper connector; the setting seal push sleeve is installed in the annular gap between the lower slip support cylinder and the upper connector and is connected and fixed to the lower slip support cylinder through the first pin; the lower internal thread of the lower slip support cylinder is connected to the upper external thread of the setting seal connecting sleeve;

[0017] The first internal locking slip engages with both the lower slip support cylinder and the upper connector through a meshing structure that mates with both.

[0018] The sleeve is installed outside the upper connector. The internal thread at the top of the sleeve is connected to the external thread at the bottom of the setting seal connecting sleeve. The internal thread at the bottom of the sleeve is connected to the external thread at the top of the piston. The piston is installed inside the lower connector and fixed by the second pin. The spindle is connected to the internal thread inside the lower connector through the lower external thread. The internal thread at the top of the spindle is connected to the external thread at the upper connector.

[0019] The first sealing ring and the first retaining ring are installed in the sealing ring groove on the inner surface of the upper cone, and contact the outer surface of the upper connector to form a seal;

[0020] The second sealing ring and the second retaining ring are installed in the sealing ring groove on the inner surface of the casing, and contact the outer surface of the upper connector to form a seal;

[0021] The third sealing ring and the third retaining ring are installed in the sealing ring groove on the outer surface of the mandrel, and contact the inner surface of the protective sleeve to form a seal;

[0022] The fourth sealing ring and the fourth retaining ring are installed in the sealing ring groove on the inner surface of the piston, and contact the outer surface of the spindle to form a seal;

[0023] The fifth sealing ring and the fifth retaining ring are installed in the sealing ring groove on the outer surface of the piston, and contact the inner surface of the lower connector to form a seal;

[0024] After assembly, the packer reaches the set-and-activated state. The upper connector and its pressure transmission hole, the second sealing ring and the second retaining ring installed in the sealing ring groove inside the casing, the third sealing ring and the third retaining ring installed in the sealing ring groove on the outer surface of the mandrel, the casing, and the mandrel form a seal and the first-stage set-and-activated piston area. The mandrel and its pressure transmission hole, the piston, the fourth sealing ring and the fourth retaining ring installed in the sealing ring groove on the inner surface of the piston, the fifth sealing ring and the fifth retaining ring installed in the sealing ring groove on the outer surface of the piston, and the lower connector form the second-stage set-and-activated piston area. The two-stage set-and-activated areas are connected to the internal area of ​​the packer through the pressure transmission hole. Only by applying hydraulic pressure to the inside of the packer can the set-and-activated process of the packer be activated. When installing the upper cone, the first sealing ring and the first retaining ring are fitted onto the surface of the upper connector and the sealing ring groove of the upper cone.

[0025] Liquid pressure is applied inside the upper connector and mandrel. Hydraulic pressure is transmitted to the piston chamber through the pressure transmission holes on the upper connector and mandrel. When the pressure reaches the breaking pressure of the second pin, the sleeve and piston push the setting seal connecting sleeve, lower slip support sleeve, first inner locking slip, setting seal push sleeve, and cylindrical slip to the left. When the setting seal push sleeve contacts the lower cone and the pressure exceeds the breaking value of the fixed pin, the lower cone of the slip will push the first inner locking slip, sealing support sleeve, and sealing assembly to the left and compress them. When the pressure exceeds the breaking value of the fixed pin on the upper cone, the upper cone will squeeze the cylinder. The cylindrical slip will open outward along the inclined conical surface of the upper cone and the conical surface at the contact position with the upper slip support sleeve until it contacts the inner wall of the sleeve; when the sealing assembly is completely sealed and fills the annular space of the sleeve, and the pressure reaches the breaking value of the first pin, the cylindrical slip will also open along the inclined conical surface of the lower cone until it contacts the sleeve. During this process, the anti-reverse function of the second inner locking slip can effectively prevent the rebound of the sealing assembly; continue to increase the liquid pressure inside the upper connector and mandrel until the sealing assembly is completely compressed and the cylindrical slip is fully opened and the setting seal is completed;

[0026] Finally, the cylindrical slips, supported by the upper cone, the inclined conical surface of the upper slip support sleeve, and the lower cone and the inclined conical surface of the lower slip support sleeve, tightly grip the casing, while maintaining the sealing assembly in a fully compressed state. On the other hand, the first and second internal locking slips play a real-time anti-backward role, preventing the lower slip support sleeve and the sealing support sleeve from backing up, while also maintaining the sealing assembly in a fully compressed state. By setting up a new type of high-temperature and high-pressure sealing structure with optimized design and adding a support ring between the inclined rubber sleeves, the system can cope with higher temperature well conditions. The innovative multi-stage cylindrical slip structure design effectively improves the pressure resistance of the packer and significantly reduces the damage of the slips to the casing. The double internal slip anti-backward design provides multiple guarantees for maintaining the setting state of the packer rubber sleeve. The optimized setting structure of the packer makes the setting principle of the packer more scientific and reasonable, further enhancing the stability of the packer and making it more adaptable to high-temperature and high-pressure environments. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a three-dimensional structural diagram of the upper connector in a cylindrical slip-type high-temperature and high-pressure permanent packer.

[0029] Figure 2 This is a cross-sectional schematic diagram of the upper connector in a cylindrical slip-type high-temperature and high-pressure permanent packer.

[0030] Figure 3 This is a cross-sectional schematic diagram of the slip assembly in a cylindrical slip-type high-temperature and high-pressure permanent packer.

[0031] Figure 4 This is a cross-sectional structural diagram of the sealing assembly in a cylindrical slip-type high-temperature and high-pressure permanent packer;

[0032] Figure 5 This is a cross-sectional schematic diagram of the lower slip support cylinder in a cylindrical slip-type high-temperature and high-pressure permanent packer.

[0033] Figure 6 This is a cross-sectional schematic diagram of the piston in a cylindrical slip-type high-temperature and high-pressure permanent packer.

[0034] Figure 7 This is a cross-sectional schematic diagram of the lower connector in a cylindrical slip-type high-temperature and high-pressure permanent packer.

[0035] Figure 8 This is a three-dimensional structural diagram of a cylindrical slip in a cylindrical slip-type high-temperature and high-pressure permanent packer.

[0036] In the diagram: 1. Upper connector; 2. Upper slip support sleeve; 3. Slip assembly; 31. Cylindrical slip; 32. Fixing bolt; 33. Screw; 4. Sealing assembly; 41. First sealing ring; 42. Second sealing ring; 43. First support ring; 44. Second support ring; 45. Third support ring; 46. Third sealing ring; 47. Fourth sealing ring; 5. Upper cone; 6. Sealing push sleeve; 7. First inner locking slip; 8. Lower slip support cylinder; 9. Mandrel; 10. Lower connector; 11. Piston; 12. Protective sleeve ; 13. Lower cone; 14. Second inner locking slip; 15. Sealing support sleeve; 16. Setting seal connecting sleeve; 17. First pin; 18. Second pin; 19. Fixing pin; 20. Anti-rotation pin; 21. Sealing assembly; 210. First retaining ring; 211. First sealing ring; 212. Second retaining ring; 213. Second sealing ring; 214. Third retaining ring; 215. Third sealing ring; 216. Fourth retaining ring; 217. Fourth sealing ring; 218. Fifth retaining ring; 219. Fifth sealing ring. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0038] Please see Figure 1-8As shown, a cylindrical slip-type high-temperature and high-pressure permanent packer includes an upper connector 1 and a mandrel 9. The inner surface of the mandrel 9 is threadedly connected to the surface of the upper connector 1. A lower connector 10 is threadedly connected to the surface of the mandrel 9. An upper slip support sleeve 2 is threadedly connected to the surface of the upper connector 1. A first inner locking slip 7 and a second inner locking slip 14 are fitted onto the surface of the upper connector 1. An upper cone 5 and a lower cone 13 are fitted onto the surface of the upper connector 1. The lower connector 10 is threadedly connected to the surface of the mandrel 9. A sealing support sleeve 15 is fitted onto the surface of the upper connector 1. The sealing support sleeve 15 is threadedly connected to the lower cone 13. The second inner locking slip 14 is inserted into the sealing support sleeve 15 and the upper connector 10. The gap between the head 1 and the lower cone 13, the inner surface of the sealing support sleeve 15, the surface of the upper connector 1, and the second inner locking slip 14 mesh with each other, the surface of the upper connector 1 is fitted with the lower slip support cylinder 8, the first inner locking slip 7 is inserted into the surface of the lower slip support cylinder 8 and the upper connector 1, the inner surface of the lower slip support cylinder 8, the surface of the upper connector 1, and the surface of the first inner locking slip 7 mesh with each other, the surface of the upper cone 5 is provided with a slip assembly 3, the slip assembly 3 includes a cylindrical slip 31, the cylindrical slip 31 is fitted onto the surface of the upper cone 5, the inner surface of the cylindrical slip 31 is fitted with a fixing bolt 32, and the fixing bolt 32 and the inner wall of the cylindrical slip 31 are threadedly connected with two screws 33.

[0039] The upper connector 1 and the lower cone 13 are threadedly connected to the inner walls of a fixing pin 19, and the upper connector 1 and the upper slip support sleeve 2 are threadedly connected to the inner walls of a plurality of anti-rotation pins 20.

[0040] The surface of the upper connector 1 is provided with a sealing assembly 4, which includes two first sealing support rings 41. The two first sealing support rings 41 are sleeved on the surface of the upper connector 1, and the two first sealing support rings 41 are respectively located on the side walls of the upper cone 5 and the sealing support sleeve 15. A second sealing support ring 42 is sleeved on the surface of the upper connector 1 near the first sealing support rings 41. A first sealing ring 43 is sleeved on the surface of the upper connector 1 near the second sealing support rings 42. A fourth sealing ring 47 is sleeved on the surface of the upper connector 1. Two third sealing support rings 46 are sleeved on both sides of the surface of the upper connector 1 near the fourth sealing ring 47. A third sealing ring 45 is sleeved on the surface of the upper connector 1 near the third sealing support rings 46. A second sealing ring 44 is sleeved on the surface of the upper connector 1 near the second sealing support rings 42 and the third sealing rings 45. The second sealing ring 44 is located on the side wall of the first sealing ring 43.

[0041] The upper connector 1 is fitted with a setting push sleeve 6, and the setting push sleeve 6 and the inner wall of the lower slip support cylinder 8 are threadedly connected by a first pin 17. The inner wall of the lower slip support cylinder 8 is threadedly connected by a setting connecting sleeve 16.

[0042] The upper connector 1 is fitted with a protective sleeve 12, and the surface of the protective sleeve 12 is threadedly connected to the inner surface of the seat seal connecting sleeve 16. The piston 11 is fitted on the surface of the upper connector 1, and the surface of the piston 11 is threadedly connected to the inner surface of the protective sleeve 12. The piston 11 is inserted into the inner surface of the lower connector 10, and the piston 11 and the inner wall of the lower connector 10 are threadedly connected by a plurality of second pins 18. The surface of the mandrel 9 is threadedly connected to the inner surface of the lower connector 10.

[0043] The surface of the upper connector 1 is provided with a sealing component 21. The sealing component 21 includes a first sealing ring 211, which is sleeved on the surface of the upper connector 1 and inserted into the inner surface of the upper cone 5. A first retaining ring 210 is sleeved on both sides of the surface of the upper connector 1 near the first sealing ring 211. A second sealing ring 213 is sleeved on the surface of the upper connector 1 and inserted into the inner surface of the protective sleeve 12. A second retaining ring 212 is sleeved on both sides of the surface of the upper connector 1 near the second sealing ring 213.

[0044] The surface of the mandrel 9 is fitted with a third sealing ring 215, which is inserted into the inner surface of the sleeve 12. The mandrel 9 is fitted with third retaining rings 214 on both sides near the third sealing ring 215. The mandrel 9 is fitted with a fourth sealing ring 217, which is inserted into the inner surface of the piston 11. The mandrel 9 is fitted with fourth retaining rings 216 on both sides near the fourth sealing ring 217.

[0045] The piston 11 is fitted with a fifth sealing ring 219, which is inserted into the inner surface of the lower connector 10. The piston 11 is fitted with a fifth retaining ring 218 on both sides near the fifth sealing ring 219.

[0046] Working principle: When the packer is needed, the upper slip support sleeve 2 is connected to the external thread of the upper connector 1. Then, the anti-rotation pin 20 is rotated to the outer wall of the upper slip support sleeve 2 and the upper connector 1. The slip assembly 3 is installed in the groove of the upper slip support sleeve 2 and is tensioned and fixed to the upper cone 5 by the upper slip support sleeve 2 to prevent opening. The upper cone 5 is installed on the outside of the upper connector 1 and cooperates with the slip assembly 3. After the cylindrical slip 31 is fitted onto the surface of the upper connector 1, the fixing bolt 32 is inserted into the inner wall of the cylindrical slip 31. Then, rotate screw 33 to the inner surface of fixing bolt 32 and cylindrical slip 31. The sealing assembly 4 is installed on the outside of upper connector 1 and fixed in the designated position by upper cone 5, sealing support sleeve 15, second inner locking slip 14 and lower cone 13. The inner walls of the first sealing support ring 41, second sealing support ring 42, first sealing ring 43, second sealing ring 44, third sealing ring 45, third sealing support ring 46 and fourth sealing ring 47 contact the smooth sealing surface of the outer wall of upper connector 1 to achieve sliding sealing.

[0047] The second inner locking slip 14 is combined with the upper connector 1 through its meshing structure and the inclined surface that contacts the sealing support sleeve 15.

[0048] The lower cone 13 is installed on the outside of the upper connector 1 and mates with the slip assembly 3; the slip assembly 3 is installed in the groove of the lower slip support cylinder 8 and is tensioned and fixed to the lower cone 13 by the lower slip support cylinder 8; the lower slip support cylinder 8 is sleeved on the outside of the upper connector 1; the setting seal push sleeve 6 is installed in the annular gap between the lower slip support cylinder 8 and the upper connector 1, and is connected and fixed to the lower slip support cylinder 8 by the first pin 17; the lower internal thread of the lower slip support cylinder 8 is connected to the upper external thread of the setting seal connecting sleeve 16;

[0049] The first inner locking slip 7 engages with both the lower slip support cylinder 8 and the upper connector 1 through a meshing structure that cooperates with both.

[0050] The sleeve 12 is installed outside the upper connector 1. The internal thread of the upper part of the sleeve 12 is connected to the lower external thread of the seat seal connecting sleeve 16, and the internal thread of the lower part of the sleeve 12 is connected to the upper external thread of the piston 11. The piston 11 is installed inside the lower connector 10 and fixed by the second pin 18. The spindle 9 is connected to the internal thread inside the lower connector 10 through the lower external thread. The internal thread of the upper part of the spindle 9 is connected to the external thread of the upper connector 1.

[0051] The first sealing ring 211 and the first retaining ring 210 are installed in the sealing ring groove on the inner surface of the upper cone 5, and contact the outer surface of the upper connector 1 to form a seal;

[0052] The second sealing ring 213 and the second retaining ring 212 are installed in the sealing ring groove on the inner surface of the casing 12, and contact the outer surface of the upper connector 1 to form a seal;

[0053] The third sealing ring 215 and the third retaining ring 214 are installed in the sealing ring groove on the outer surface of the spindle 9, and contact the inner surface of the sleeve 12 to form a seal;

[0054] The fourth sealing ring 217 and the fourth retaining ring 216 are installed in the sealing ring groove on the inner surface of the piston 11, and contact the outer surface of the spindle 9 to form a seal;

[0055] The fifth sealing ring 219 and the fifth retaining ring 218 are installed in the sealing ring groove on the outer surface of the piston 11, and contact the inner surface of the lower connector 10 to form a seal;

[0056] After assembly, the packer reaches the set-and-activated state. The upper connector 1 and its pressure transmission hole, the second sealing ring 213 and the second retaining ring 212 installed in the sealing ring groove inside the casing 12, the third sealing ring 215 and the third retaining ring 214 installed in the sealing ring groove on the outer surface of the spindle 9, the casing 12, and the spindle 9 form a sealing and first-stage set-and-activated piston 11 area. The spindle 9 and its pressure transmission hole, the piston 11, the fourth sealing ring 217 and the fourth retaining ring 216 installed in the sealing ring groove on the inner surface of the piston 11, the fifth sealing ring 219 and the fifth retaining ring 218 installed in the sealing ring groove on the outer surface of the piston 11, and the lower connector 10 form a second-stage set-and-activated piston 11 area. The two-stage set-and-activated areas are connected to the internal area of ​​the packer through the pressure transmission hole. Only by applying hydraulic pressure to the inside of the packer can the set-and-activated process of the packer be activated. When installing the upper cone, the first sealing ring 211 and the first retaining ring 210 are fitted onto the surface of the upper connector 1 and the sealing ring groove of the upper cone.

[0057] Liquid pressure is applied inside the upper connector 1 and the mandrel 9. The hydraulic pressure is transmitted to the piston 11 cavity through the pressure transmission holes on the upper connector 1 and the mandrel 9. When the pressure reaches the breaking pressure of the second pin 18, the sleeve 12 and the piston 11 push the setting seal connecting sleeve 16, the lower slip support sleeve 8, the first inner locking slip 7, the setting seal push sleeve 6, and the cylindrical slip 31 to the left. When the setting seal push sleeve 6 contacts the lower cone 13 and the pressure is greater than the breaking value of the fixed pin 19, the lower cone 13 of the slip will push the first inner locking slip 7, the sealing support sleeve 15, and the sealing assembly 4 to the left and compress them. When the pressure is greater than the breaking value of the fixed pin 19 on the upper cone 5, the upper... Cone 5 will squeeze cylindrical slip 31, which will open outward along the inclined conical surface of upper cone 5 and the position of contact with upper slip support sleeve 2 until it contacts the inner wall of the sleeve; when the sealing assembly 4 is completely sealed and fills the annular space of the sleeve, and the pressure reaches the breaking value of the first pin 17, cylindrical slip 31 will also open along the inclined conical surface of lower cone 13 until it contacts the sleeve. During this process, the anti-retraction function of the second inner locking slip 14 can effectively prevent the rebound of the sealing assembly 4; continue to increase the internal liquid pressure of upper connector 1 and mandrel 9 until the sealing assembly 4 is completely compressed and cylindrical slip 31 is fully opened and the setting seal is completed;

[0058] Finally, the cylindrical slips, supported by the upper cone 5, the inclined conical surface of the upper slip support sleeve 2, the lower cone 13, and the inclined conical surface of the lower slip support cylinder 8, tightly grip the sleeve, while maintaining the sealing assembly 4 in a fully compressed state. On the other hand, the first inner locking slip 7 and the second inner locking slip 14 play a real-time anti-backward role, preventing the lower slip support cylinder 8 and the sealing support sleeve 15 from backing backward, while also maintaining the sealing assembly 4 in a fully compressed state.

[0059] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0060] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A cylindrical slip-type high-temperature and high-pressure permanent packer, comprising an upper connector (1) and a mandrel (9), characterized in that: The inner surface of the mandrel (9) and the surface of the upper connector (1) are threaded together. The surface of the upper connector (1) is threadedly connected to an upper slip support sleeve (2). The surface of the upper connector (1) is engaged with the upper slip support sleeve (2). The surface of the upper connector (1) is fitted with a first inner locking slip (7) and a second inner locking slip (14). The surface of the upper connector (1) is fitted with an upper cone (5) and a lower cone (13). The surface of the mandrel (9) is threadedly connected to a lower connector (10). The surface of the upper connector (1) is fitted with a sealing support sleeve (15). The sealing support sleeve (15) and the lower cone (13) are threaded together. The second inner locking slip (14) is inserted into the surfaces of the sealing support sleeve (15), the upper connector (1), and the lower cone (13). The inner surface of the sealing support sleeve (15), the surface of the upper connector (1), and the second inner locking slip (14) mesh with each other. The surface of the upper connector (1) is fitted with a lower slip support cylinder (8). The first inner locking slip (7) is inserted into the surface of the lower slip support cylinder (8) and the upper connector (1). The inner surface of the lower slip support cylinder (8), the surface of the upper connector (1), and the surface of the first inner locking slip (7) mesh with each other. The surface of the upper cone (5) is provided with a slip assembly (3). The slip assembly (3) includes a cylindrical slip (31). The cylindrical slip (31) is fitted onto the surface of the upper cone (5). A fixing bolt (32) is inserted into the inner surface of the cylindrical slip (31). The fixing bolt (32) and the inner wall of the cylindrical slip (31) are connected by two screws (33).

2. The cylindrical slip-type high-temperature and high-pressure permanent packer according to claim 1, characterized in that: The inner walls of the lower cone (13) and the upper connector (1) are threaded with fixing pins (19), and the inner walls of the upper connector (1) and the upper slip support sleeve (2) are threaded with multiple anti-rotation pins (20).

3. A cylindrical slip-type high-temperature and high-pressure permanent packer according to claim 2, characterized in that: The upper connector (1) has a sealing assembly (4) on its surface. The sealing assembly (4) includes two first sealing support rings (41). The two first sealing support rings (41) are fitted onto the surface of the upper connector (1), and the two first sealing support rings (41) are respectively located on the side walls of the upper cone (5) and the sealing support sleeve (15). A second sealing support ring (42) is fitted onto the surface of the upper connector (1) near the first sealing support rings (41), and a first sealing support ring (42) is fitted onto the surface of the upper connector (1) near the second sealing support ring (42). The upper connector (1) is fitted with a fourth sealing ring (47), and two third sealing support rings (46) are fitted on both sides of the upper connector (1) near the fourth sealing ring (47). A third sealing ring (45) is fitted on the upper connector (1) near the third sealing support ring (46). A second sealing ring (44) is fitted on the upper connector (1) near the second sealing support ring (42) and the third sealing ring (45). The second sealing ring (44) is located on the side wall of the first sealing ring (43).

4. The cylindrical slip-type high-temperature and high-pressure permanent packer according to claim 1, characterized in that: The upper connector (1) is fitted with a setting push sleeve (6), which is installed in the annular gap between the upper connector (1) and the lower slip support cylinder (8). The setting push sleeve (6) and the lower slip support cylinder (8) are fixed together by a first pin (17). The inner wall of the lower slip support cylinder (8) is threaded with a setting connecting sleeve (16).

5. A cylindrical slip-type high-temperature and high-pressure permanent packer according to claim 1, characterized in that: The upper connector (1) is fitted with a protective sleeve (12), the surface of the protective sleeve (12) is threadedly connected to the inner surface of the seated connecting sleeve (16), the piston (11) is fitted on the surface of the mandrel (9), the surface of the piston (11) is threadedly connected to the inner surface of the protective sleeve (12), the piston (11) is inserted into the inner surface of the lower connector (10), the piston (11) and the inner wall of the lower connector (10) are threadedly connected with a plurality of second pins (18), and the surface of the mandrel (9) is threadedly connected to the inner surface of the lower connector (10).

6. A cylindrical slip-type high-temperature and high-pressure permanent packer according to claim 1, characterized in that: The upper connector (1) is provided with a sealing component (21) on its surface. The sealing component (21) includes a first sealing ring (211), which is fitted on the surface of the upper connector (1) and inserted into the inner surface of the upper cone (5). A first retaining ring (210) is fitted on both sides of the upper connector (1) near the first sealing ring (211). A second sealing ring (213) is fitted on the surface of the upper connector (1) and inserted into the inner surface of the protective sleeve (12). A second retaining ring (212) is fitted on both sides of the upper connector (1) near the second sealing ring (213).

7. A cylindrical slip-type high-temperature and high-pressure permanent packer according to claim 1, characterized in that: The surface of the mandrel (9) is fitted with a third sealing ring (215), which is inserted into the inner surface of the sleeve (12). The mandrel (9) is fitted with third retaining rings (214) on both sides of the mandrel (9) near the third sealing ring (215). The surface of the mandrel (9) is fitted with a fourth sealing ring (217), which is inserted into the inner surface of the piston (11). The mandrel (9) is fitted with fourth retaining rings (216) on both sides of the mandrel (9) near the fourth sealing ring (217).

8. A cylindrical slip-type high-temperature and high-pressure permanent packer according to claim 5, characterized in that: The piston (11) is fitted with a fifth sealing ring (219), which is inserted into the inner surface of the lower connector (10). The piston (11) is fitted with a fifth retaining ring (218) on both sides of the piston (11) near the fifth sealing ring (219).

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