Ultra-high-temperature and ultra-high-pressure gas seal well completion packer

Abstract

The invention relates to an ultra-high temperature and ultra-high pressure gas seal well completion packer which comprises an upper core shaft, a lower connector, a connecting sleeve, an upper piston, a lower core shaft and a lower piston, the lower end of the upper core shaft is arranged in the upper end of the lower core shaft, and the lower end of the lower core shaft is fixedly arranged in the upper end of the lower connector; a first shaft shoulder is arranged on the upper portion of the outer side wall of the upper mandrel, the upper portion of the outer side wall of the upper mandrel is sleeved with a slip supporting sleeve, the portion, located below the slip supporting sleeve, of the upper portion of the outer side wall of the upper mandrel is sleeved with a first cone, the outer side wall of the first cone is sleeved with a first slip, and the upper end of the first slip abuts against the lower end of the slip supporting sleeve. The upper portion of the outer side wall of the upper core shaft is sleeved with a sealing assembly below the first cone, the outer side wall of the upper core shaft is sleeved with a second cone below the sealing assembly, the outer side wall of the second cone is sleeved with a second slip, and the outer side wall of the upper core shaft is sleeved with a locking ring sleeve below the second slip. The cable has the characteristics of safety, reliability, stable performance and extra-high temperature and extra-high voltage resistance.

Description

Technical Field

[0001] The invention relates to an ultra-high temperature and ultra-high pressure gas-sealed well completion packer. Background Art

[0002] During the completion phase of oil and gas wells, the function of the packer is to seal the annular space above and below the casing at the packer to protect the upper casing. At present, there are many specifications of completion packers in China, but most of them have pressure levels within 105MPa and temperature levels within 204℃, which can meet the requirements for ordinary reservoirs in Sichuan, Chongqing and Xinjiang, but cannot meet the application requirements in ultra-high temperature and ultra-high pressure reservoirs (the tool pressure level is required to reach 140MPa and the temperature level is required to reach 232℃). Summary of the invention

[0003] In view of the above problems existing in the prior art, the main purpose of the present invention is to provide an ultra-high temperature and ultra-high pressure gas-tight completion packer.

[0004] The present invention provides the following technical solutions: An ultra-high temperature and ultra-high pressure gas-sealed completion packer comprises an upper mandrel, a lower joint, a connecting sleeve, an upper piston, a lower mandrel and a lower piston, wherein: The lower end of the upper mandrel is arranged inside the upper end of the lower mandrel, and the lower end of the lower mandrel is fixedly arranged inside the upper end of the lower joint; A first shaft shoulder is arranged on the upper part of the outer wall of the upper mandrel, a slip support sleeve is sleeved on the upper part of the outer wall of the upper mandrel, and the upper end of the slip support sleeve abuts against the lower end side wall of the first shaft shoulder, a first cone is sleeved on the upper part of the outer wall of the upper mandrel below the slip support sleeve, a first slip is sleeved on the outer wall of the first cone, the upper end of the first slip abuts against the lower end of the slip support sleeve, and the first slip is fixedly connected to the slip support sleeve by a fastener; The upper part of the outer wall of the upper mandrel is located below the first cone and is sleeved with a sealing assembly, the outer wall of the upper mandrel is located below the sealing assembly and is sleeved with a second cone, the outer wall of the second cone is sleeved with a second slip, the outer wall of the upper mandrel is located below the second slip and is sleeved with a locking ring, the upper end of the locking ring abuts against the lower end of the second slip; The connecting sleeve is sleeved on the lower part of the outer wall of the upper core shaft, and the end of the upper end of the connecting sleeve is fixedly arranged inside the lower end of the locking ring sleeve, the upper piston sealing sleeve is arranged on the lower end of the outer wall of the upper core shaft, the upper end of the upper piston is fixedly sleeved on the outer wall of the lower end of the connecting sleeve, and the upper end of the lower core shaft is sealed on the inner wall of the upper piston; The lower piston is sleeved on the outer side wall of the lower core shaft, and the upper end of the lower piston is fixedly arranged on the inner side wall of the lower end of the upper piston; The lower joint is fixedly sleeved on the lower end of the outer wall of the lower core shaft, the lower end sealing sleeve of the lower piston is arranged on the upper inner wall of the lower joint, and the lower end sealing sleeve of the lower piston is arranged on the lower outer wall of the lower core shaft.

[0005] The interior of the cava support sleeve has a cava support sleeve cavity, the outer diameter of the cava support sleeve is larger than the outer diameter of the first shaft shoulder, the lower portion of the outer side wall of the cava support sleeve is concave to form a positioning groove, the bottom of the positioning groove is provided with a first positioning through hole, and the first positioning through hole is connected to the cava support sleeve cavity.

[0006] The first slip has a first slip cavity inside, the outer diameter of the first slip is smaller than the outer diameter of the slip support sleeve, one end of the outer side wall of the first slip is inwardly concave to form a first clamping groove, and the first clamping groove is connected to the first slip cavity; The fastener includes a fixing key and a fastening screw, one end of the fixing key is located in the positioning groove, and the other end of the fixing key is located in the first clamping groove. The fastening screw passes through the fixing hole on the fixing key and is arranged in the first positioning through hole. The cava support sleeve and the first cava are fixedly connected to the upper core shaft through the cooperation of the fixing key and the fastening screw.

[0007] The sealing assembly comprises a first rubber cylinder support ring, a first end rubber cylinder, a middle rubber cylinder, a second end rubber cylinder and a second rubber cylinder support ring which are arranged in sequence from top to bottom, wherein: A first support ring and a first protective ring are sleeved on the upper part of the outer wall of the upper core shaft and located between the first cone and the first rubber cylinder support ring, the first protective ring is located below the first support ring, and the upper part of the first protective ring is located inside the first support ring; The lower end of the first rubber cylinder support ring is sleeved on the upper end of the first end rubber cylinder, the lower end of the first end rubber cylinder abuts against the lower end of the middle rubber cylinder, the lower end of the middle rubber cylinder abuts against the upper end of the second end rubber cylinder, and the lower end of the second end rubber cylinder is arranged inside the upper end of the second rubber cylinder support ring.

[0008] The upper and lower ends of the first cone are respectively a first end and a second end, the outer diameter of the first end is smaller than the outer diameter of the second end, the first end is located inside the first slip cavity on the first slip, and the second end is located outside the first slip; The first cone has a first cone cavity inside, the outer wall of the first cone is provided with a first fixing groove and a second fixing groove along the circumferential direction, and the first slip is sleeved on the first fixing groove and the second fixing groove; The outer wall of the second end is evenly provided with a plurality of first connecting through holes along the circumferential direction, and a first full-length tapered groove pin is provided in each of the first connecting through holes. The second end is fixedly connected to the upper core shaft through the cooperation of the first connecting through hole and the first full-length tapered groove pin.

[0009] A second cone is sleeved on the outer wall of the upper mandrel and located below the second rubber tube support ring, a second slip is sleeved on the outer wall of the second cone, and a second support ring and a second protection ring are sleeved on the outer wall of the upper mandrel and located between the second rubber tube support ring and the second cone, and the second support ring is located below the second protection ring; The lower end of the second protection ring is located inside the upper end of the second support ring, and the upper end of the second cone abuts against the outer side wall of the lower end of the second support ring; The upper and lower ends of the second cone are respectively the third end and the fourth end, the outer diameter of the third end is greater than the outer diameter of the fourth end, the third end is located above the upper end of the second cone, and the fourth end is located inside the second slip cavity in the second slip.

[0010] The lock ring sleeve has a lock ring sleeve cavity inside, the upper inner side wall of the lock ring sleeve is concave to form a first mounting groove, the lower inner side wall of the lock ring sleeve is concave to form a second mounting groove, the second mounting groove and the first mounting groove are respectively connected to the lock ring sleeve cavity, and the upper end of the connecting sleeve is located in the second mounting groove; The upper end of the locking ring sleeve abuts against the outer side wall of the lower end of the second slip, and a shear ring is sleeved on the outer side wall of the upper mandrel, and the upper end of the shear ring abuts against the side wall of the lower end of the second cone; A first installation cavity is formed between the lower end of the inner side wall of the second slip and the outer side wall of the upper mandrel, and the upper part of the shear ring is located in the first installation cavity; A second installation cavity is formed between the first installation groove of the locking ring sleeve and the outer side wall of the upper core shaft, and the lower part of the shear ring is located in the second installation cavity.

[0011] A plurality of first mounting through holes are evenly arranged on the upper portion of the outer wall of the locking ring sleeve along the circumferential direction, and the first mounting through holes are connected to the first mounting groove; Also included is a third full-length tapered groove pin, one end of which is mounted in the first mounting groove; The shear ring has a shear ring cavity inside, a second shaft shoulder is arranged at the lower end of the outer wall of the shear ring along the circumferential direction, a plurality of second mounting through holes are evenly arranged on the outer wall of the second shaft shoulder along the circumferential direction, the second mounting through holes are communicated with the shear ring cavity, and the other end of the third full-length tapered groove pin is installed in the second mounting through hole; The inner side wall of the cavity of the locking ring sleeve on the locking ring sleeve is provided with an internal thread, the outer side wall of the upper core shaft is sleeved with a locking ring, and the locking ring is threadedly connected to the inner side wall of the cavity of the locking ring sleeve; The outer side wall of the shear ring is provided with a plurality of countersunk holes along the circumferential direction, the countersunk holes are communicated with the shear ring cavity, a first set screw is provided in the countersunk holes, and an end of the first set screw is fixedly provided in the locking ring; A plurality of third mounting through holes are evenly arranged along the circumferential direction on the lower portion of the outer side wall of the shear ring, and the third mounting through holes are provided with second fixing screws, and the shear ring is fixedly connected to the upper end of the connecting sleeve via the second fixing screws.

[0012] A third shoulder is provided at the lower end of the outer wall of the connecting sleeve along the circumferential direction; The upper piston has an upper piston cavity inside, the upper end of the upper piston is concave to form a first upper piston cavity, the lower end of the upper piston is concave to form a second upper piston cavity, and the second upper piston cavity and the first upper piston cavity are respectively connected to the upper piston cavity; The upper piston is sleeved on the outer side wall of the lower end of the connecting sleeve through the first upper piston cavity, and the upper end of the upper piston abuts against the outer side wall of the lower end of the third shoulder; The upper piston is arranged at the lower end of the outer wall of the upper core shaft through the upper piston cavity sealing sleeve, the lower core shaft has a lower core shaft cavity inside, the upper part of the inner side wall of the lower core shaft cavity is concave to form a lower core shaft installation recess, and the upper end of the lower core shaft is sleeved on the outer wall of the lower end of the upper core shaft through the lower core shaft installation recess; A fourth shoulder is provided at the upper end of the outer wall of the lower core shaft along the circumferential direction. The fourth shoulder seal is provided at the upper end inside the second upper piston cavity. The lower end of the inner wall of the second upper piston cavity is concave to form an upper piston mounting recess.

[0013] The lower piston has a lower piston cavity inside, a fifth shoulder is arranged on the upper part of the outer wall of the lower piston along the circumferential direction, a sixth shoulder is arranged on the outer wall of the fifth shoulder along the circumferential direction, and fastening grooves are evenly arranged on the fifth shoulder below the sixth shoulder along the circumferential direction; The lower end of the inner wall of the lower piston cavity extends outward in the circumferential direction to form a mounting protrusion, the inner wall of the mounting protrusion is concave in the circumferential direction to form a third sealing groove, and the lower end of the outer wall of the lower piston is concave in the circumferential direction to form a fourth sealing groove.

[0014] The present invention has the following advantages and beneficial effects: the ultra-high temperature and ultra-high pressure air-tight completion packer provided in the embodiment of the present invention is put into the well together with the matching ball seat. After it is lowered to the designed position in the well, a matching sealing steel ball is put into the well. After the sealing steel ball reaches the position of the ball seat, a closed cavity is formed in the tubing string. The tubing string is pressurized in stages to the complete minimum sealing pressure of the packer. The packer is sealed under the action of pressure, and the upper and lower annular spaces at the packer are sealed, creating suitable wellbore conditions for the completion and production of oil and gas wells. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the three-dimensional structure of an ultra-high temperature and ultra-high pressure gas-tight completion packer provided in an embodiment of the present invention.

[0016] Figure 2 A schematic cross-sectional structure diagram of an ultra-high temperature and ultra-high pressure gas-tight completion packer provided in an embodiment of the present invention.

[0017] Figure 3 for Figure 2 Schematic diagram of the enlarged structure at position A in the middle.

[0018] Figure 4 An enlarged three-dimensional structural schematic diagram of a slip support sleeve provided in an embodiment of the present invention.

[0019] Figure 5 An enlarged cross-sectional structural schematic diagram of a slip support sleeve provided in an embodiment of the present invention.

[0020] Figure 6 This is a schematic diagram of an enlarged three-dimensional structure of a first slip provided in an embodiment of the present invention.

[0021] Figure 7 An enlarged side structural schematic diagram of the first slip provided in an embodiment of the present invention.

[0022] Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure in the BB direction.

[0023] Fig. 9 This is a schematic diagram of an enlarged three-dimensional structure of a first cone provided in an embodiment of the present invention.

[0024] Fig.10 This is a schematic diagram of an enlarged cross-sectional structure of a first cone provided in an embodiment of the present invention.

[0025] Fig.11 This is a schematic diagram of an enlarged three-dimensional structure of a second cone provided in an embodiment of the present invention.

[0026] Fig.12 This is a structural schematic diagram of an enlarged cross-section of a second cone provided in an embodiment of the present invention.

[0027] Fig.13 This is an enlarged three-dimensional structural schematic diagram of the first support ring provided in an embodiment of the present invention.

[0028] Fig.14 This is an enlarged three-dimensional structural schematic diagram of a first protection ring provided in an embodiment of the present invention.

[0029] Fig.15 An enlarged three-dimensional structural schematic diagram of a first limiting protection ring provided in an embodiment of the present invention.

[0030] Fig.16 This is an enlarged three-dimensional structural schematic diagram of the first rubber cylinder support ring provided in an embodiment of the present invention.

[0031] Fig.17 This is an enlarged three-dimensional structural schematic diagram of the first end rubber sleeve provided by an embodiment of the present invention.

[0032] Fig.18 This is an enlarged three-dimensional structural schematic diagram of the intermediate rubber cylinder provided in an embodiment of the present invention.

[0033] Fig.19 An enlarged three-dimensional structural schematic diagram of a locking ring sleeve provided in an embodiment of the present invention.

[0034] Fig. 20 An enlarged front structural schematic diagram of the locking ring sleeve provided in an embodiment of the present invention.

[0035] Fig.21 This is a schematic diagram of an enlarged cross-sectional structure of a locking ring sleeve provided in an embodiment of the present invention.

[0036] Fig. 22 An enlarged three-dimensional structural schematic diagram of a shear ring provided in an embodiment of the present invention.

[0037] Fig.23 This is a schematic diagram of an enlarged cross-sectional structure of a shear ring provided in an embodiment of the present invention.

[0038] Fig.24 An enlarged three-dimensional structural schematic diagram of a lock ring provided in an embodiment of the present invention.

[0039] Fig.25 An enlarged three-dimensional structural schematic diagram of the lower joint provided in an embodiment of the present invention.

[0040] Fig.26A schematic structural diagram of an enlarged cross-section of a lower joint provided in an embodiment of the present invention.

[0041] Fig. 27 This is an enlarged three-dimensional structural schematic diagram of the lower piston provided in an embodiment of the present invention.

[0042] Fig.28 This is a schematic diagram of an enlarged cross-sectional structure of a lower piston provided in an embodiment of the present invention.

[0043] Fig.29 This is an enlarged three-dimensional structural schematic diagram of the lower mandrel provided in an embodiment of the present invention.

[0044] Fig.30 This is a schematic diagram of an enlarged cross-sectional structure of a lower mandrel provided in an embodiment of the present invention.

[0045] Fig.31 This is an enlarged three-dimensional structural schematic diagram of the upper piston provided in an embodiment of the present invention.

[0046] Fig.32 This is a schematic diagram of an enlarged cross-sectional structure of an upper piston provided in an embodiment of the present invention.

[0047] Fig.33 This is an enlarged three-dimensional structural schematic diagram of a connecting sleeve provided in an embodiment of the present invention.

[0048] Fig.34 This is a schematic diagram of an enlarged cross-sectional structure of a connecting sleeve provided in an embodiment of the present invention.

[0049] Fig.35 This is an enlarged three-dimensional structural schematic diagram of the upper joint provided in an embodiment of the present invention.

[0050] Fig.36 This is a schematic diagram of an enlarged cross-sectional structure of an upper joint provided in an embodiment of the present invention.

[0051] Fig.37 An enlarged sectional structural schematic diagram of the first support ring, first protective ring, first limit protection ring, first rubber cylinder support ring, first end rubber cylinder, middle rubber cylinder and second end rubber cylinder, second rubber cylinder support ring, second limit protection ring, second protective ring and second support plate provided in an embodiment of the present invention.

[0052] Fig.38 An enlarged cross-sectional structural schematic diagram of the cooperation between the second slip, the second cone, the locking ring sleeve, the shear ring and the connecting sleeve provided in an embodiment of the present invention.

[0053] Fig.39 This is a schematic diagram of an enlarged cross-sectional structure of the upper mandrel, the connecting sleeve, the upper piston and the lower mandrel provided in an embodiment of the present invention.

[0054] Fig.40This is a schematic diagram of an enlarged cross-sectional structure of the upper piston, lower core shaft, lower piston and lower joint provided in an embodiment of the present invention.

[0055] Fig.41 This is a schematic diagram of an enlarged cross-sectional structure of a first end rubber sleeve provided in an embodiment of the present invention.

[0056] Fig.42 A schematic diagram of an air tightness test of an ultra-high temperature and ultra-high pressure air-tight completion packer provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0057] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0058] like Figures 1 to 42 As shown: An ultra-high temperature and ultra-high pressure gas-tight completion packer provided in an embodiment of the present invention comprises an upper mandrel 1, a lower joint 19, a connecting sleeve 27, an upper piston 26, a lower mandrel 25 and a lower piston 20, wherein: The lower end of the upper mandrel 1 is arranged inside the upper end of the lower mandrel 25, and the lower end of the lower mandrel 25 is fixedly arranged inside the upper end of the lower joint 19; A first shaft shoulder 101 is provided on the upper portion of the outer wall of the upper core shaft 1, a slip support sleeve 2 is sleeved on the upper portion of the outer wall of the upper core shaft 1, and the upper end of the slip support sleeve 2 abuts against the lower end side wall of the first shaft shoulder 101, a first cone 601 is sleeved on the upper portion of the outer wall of the upper core shaft 1 below the slip support sleeve 2, a first slip 501 is sleeved on the outer wall of the first cone 601, the upper end of the first slip 501 abuts against the lower end of the slip support sleeve 2, and the first slip 501 is fixedly connected to the slip support sleeve 2 by fasteners; The upper part of the outer wall of the upper mandrel 1 is located below the first cone 601 and is sleeved with a sealing assembly, the outer wall of the upper mandrel 1 is located below the sealing assembly and is sleeved with a second cone 602, the outer wall of the second cone 602 is sleeved with a second slip 502, the outer wall of the upper mandrel 1 is located below the second slip 502 and is sleeved with a locking ring 14, the upper end of the locking ring 14 abuts against the lower end of the second slip 502; The connecting sleeve 27 is sleeved on the lower part of the outer wall of the upper core shaft 1, and the upper end of the connecting sleeve 27 is fixedly arranged inside the lower end of the locking ring sleeve 14, the upper piston 26 is sealingly sleeved on the lower end of the outer wall of the upper core shaft 1, the upper end of the upper piston 26 is fixedly sleeved on the outer wall of the lower end of the connecting sleeve 27, and the upper end of the lower core shaft 25 is sealingly arranged on the inner wall of the upper piston 26; The lower piston 20 is sleeved on the outer side wall of the lower core shaft 25, and the upper end of the lower piston 20 is fixedly arranged on the inner side wall of the lower end of the upper piston 26; The lower joint 19 is fixedly sleeved on the lower end of the outer wall of the lower core shaft 25, the lower end of the lower piston 20 is sealed and arranged on the upper inner wall of the lower joint 19, and the lower end sealing sleeve of the lower piston 20 is arranged on the lower outer wall of the lower core shaft 25.

[0059] The interior of the cava support sleeve 2 has a cava support sleeve cavity 201, the outer diameter of the cava support sleeve 2 is larger than the outer diameter of the first shaft shoulder 101, and the lower part of the outer wall of the cava support sleeve 2 is concave to form a positioning groove 202, and the bottom of the positioning groove 202 is provided with a first positioning through hole 203, and the first positioning through hole 203 is connected to the cava support sleeve cavity 201.

[0060] The first slip 501 has a first slip cavity 511 therein, the outer diameter of the first slip 501 is smaller than the outer diameter of the slip support sleeve 2, one end of the outer side wall of the first slip 501 is concave to form a first clamping groove 512, and the first clamping groove 512 is connected to the first slip cavity 511; The fastener includes a fixing key 3 and a fastening screw 4, one end of the fixing key 3 is located in the positioning groove 202, and the other end of the fixing key 3 is located in the first clamping groove 512, and the fastening screw 4 passes through the fixing hole on the fixing key 3 and is set in the first positioning through hole 203, and the cava support sleeve 2 and the first cava 501 are fixedly connected to the upper core shaft 1 through the cooperation of the fixing key 3 and the fastening screw 4.

[0061] The sealing assembly includes a first rubber cylinder support ring 1110, a first end rubber cylinder 1201, a middle rubber cylinder 13, a second end rubber cylinder 1202 and a second rubber cylinder support ring 1120 arranged in sequence from top to bottom, wherein: A first support ring 701 and a first protective ring 801 are sleeved on the upper part of the outer wall of the upper core shaft 1 and located between the first cone 601 and the first rubber cylinder support ring 1110. The first protective ring 801 is located below the first support ring 701, and the upper part of the first protective ring 801 is located inside the first support ring 701. The lower end of the first rubber cylinder support ring 1110 is sleeved on the upper end of the first end rubber cylinder 1201, the lower end of the first end rubber cylinder 1201 abuts against the lower end of the middle rubber cylinder 13, the lower end of the middle rubber cylinder 13 abuts against the upper end of the second end rubber cylinder 1202, and the lower end of the second end rubber cylinder 1202 is arranged inside the upper end of the second rubber cylinder support ring 1120.

[0062] The upper and lower ends of the first cone 601 are respectively a first end 611 and a second end 612. The outer diameter of the first end 611 is smaller than the outer diameter of the second end 612. The first end 611 is located inside the first slip cavity 511 on the first slip 501, and the second end 612 is located outside the first slip 501. The first cone 601 has a first cone cavity 613 inside, and the outer wall of the first cone 601 is provided with a first fixing groove 614 and a second fixing groove 615 along the circumferential direction, and the first slip 501 is sleeved on the first fixing groove 614 and the second fixing groove 615; The outer wall of the second end portion 612 is evenly provided with a plurality of first connecting through holes 616 along the circumferential direction, and a first full-length tapered groove pin 301 is provided in each of the first connecting through holes 616. The second end portion 612 is fixedly connected to the upper core shaft 1 through the cooperation between the first connecting through hole 616 and the first full-length tapered groove pin 301.

[0063] A second cone 602 is sleeved on the outer wall of the upper mandrel 1 and located below the second rubber cylinder support ring 1120. A second slip 502 is sleeved on the outer wall of the second cone 602. A second support ring 702 and a second protective ring 802 are sleeved on the outer wall of the upper mandrel 1 and located between the second rubber cylinder support ring 1120 and the second cone 602. The second support ring 702 is located below the second protective ring 802. The lower end of the second protection ring 802 is located inside the upper end of the second support ring 702, and the upper end of the second cone 602 abuts against the outer side wall of the lower end of the second support ring 702; The upper and lower ends of the second cone 602 are respectively the third end 621 and the fourth end 622, the outer diameter of the third end 621 is greater than the outer diameter of the fourth end 622, the third end 621 is located above the upper end of the second cone 602, and the fourth end 622 is located inside the second slip cavity 521 in the second slip 502. At the same time, the second cone 602 has the same structure as the first cone 601, the second support ring 702 has the same structure as the first support ring 701, and the second protection ring 802 has the same structure as the first protection ring 801, so that the sealing assembly of the packer can fully play a sealing role when the packer is set.

[0064] It also includes a first limiting protection ring 901 and a second limiting protection ring 902, wherein: The first position-limiting protection ring 901 is sleeved on the outer side wall of the upper core shaft 1 and is located between the first protection ring 801 and the first rubber tube support ring 1110. The upper end of the first position-limiting protection ring 901 is located inside the lower end of the first protection ring 801, and the upper end of the first rubber tube support ring 1110 abuts against the lower end side wall of the first position-limiting protection ring 901. The second position limiting protection ring 902 is sleeved on the outer wall of the upper core shaft 1 and is located between the first rubber tube support ring 1210 and the second protection ring 802. The lower end of the second position limiting protection ring 902 abuts against the upper end side wall of the second rubber tube support ring 1120. The lower end of the second position limiting protection ring 902 is located inside the upper end of the second protection ring 802.

[0065] At the same time, one end of the inner wall of the first rubber cylinder support ring 1110 is concave inward along the circumferential direction to form a connecting groove 1111, and an anti-extrusion ring 10 is arranged in the connecting groove 1111. The anti-extrusion ring 10 is used to prevent the first rubber cylinder support ring 1110, the second rubber cylinder support ring 1120, the first limit protection ring 901 and the second limit protection ring 902 from being deformed and failing to perform a sealing function when the first rubber cylinder support ring 1110, the second rubber cylinder support ring 1120, the first limit protection ring 901 and the second limit protection ring 902 are squeezed. That is, the sealing performance of the sealing assembly and the outer wall of the upper core shaft 1 is improved by adopting the anti-extrusion ring 10. In addition, the structure of the second rubber cylinder support ring 1120 is the same as that of the first rubber cylinder support ring 1110, and the structure of the second end rubber cylinder 1202 is the same as that of the first end rubber cylinder 1201. When the packer is sealed, the structure of the two end rubber cylinders, i.e., the second end rubber cylinder 1202 and the first end rubber cylinder 1201 are the same, which is more conducive to the expansion of the rubber cylinder. After sealing, the packer can withstand the upper and lower pressure differences to meet the requirements.

[0066] The second cone 602 has a second cone cavity 620 inside, and the outer wall of the second cone 602 is provided with a third fixing groove 623 and a fourth fixing groove 624 along the circumferential direction, and the first slip 501 is sleeved on the outer wall of the second cone 602 through the first fixing groove 614 and the second fixing groove 615; The third end portion 621 is located above the upper end of the second cava 502, and the outer wall of the third end portion 621 is evenly provided with a plurality of second connecting through holes 625 along the circumferential direction, and each of the second connecting through holes 625 is provided with a second full-length tapered groove pin 302. The third end portion 621 is fixedly connected to the upper core shaft 1 through the cooperation of the second connecting through hole 625 and the second full-length tapered groove pin 302.

[0067] The lock ring sleeve 14 has a lock ring sleeve cavity 1401 inside, the upper inner side wall of the lock ring sleeve 14 is concave to form a first mounting groove 1411, and the lower inner side wall of the lock ring sleeve 14 is concave to form a second mounting groove 1412, the second mounting groove 1412 and the first mounting groove 1411 are respectively connected to the lock ring sleeve cavity 1401, and the upper end of the connecting sleeve 27 is located in the second mounting groove 1412; The upper end of the locking ring sleeve 14 abuts against the outer side wall of the lower end of the second slip 502, and a shear ring 15 is sleeved on the outer side wall of the upper mandrel 1, and the upper end of the shear ring 15 abuts against the lower side wall of the second cone 602; A first installation cavity is formed between the lower end of the inner wall of the second slip 502 and the outer wall of the upper mandrel 1, and the upper part of the shear ring 15 is located in the first installation cavity; A second installation cavity 1421 is formed between the first installation groove 1411 of the locking ring sleeve 14 and the outer side wall of the upper core shaft 1 , and the lower portion of the shear ring 15 is located in the second installation cavity 1421 .

[0068] A plurality of first mounting through holes 1402 are evenly arranged on the upper portion of the outer wall of the locking ring sleeve 14 along the circumferential direction, and the first mounting through holes 1402 are connected to the first mounting groove 1411; It also includes a third full-length tapered groove pin 303, one end of which is installed in the first installation groove 1411; The shear ring 15 has a shear ring cavity 1501 inside, and a second shoulder 1502 is arranged at the lower end of the outer wall of the shear ring 15 along the circumferential direction. A plurality of second mounting through holes 1512 are evenly arranged on the outer wall of the second shoulder 1502 along the circumferential direction, and the second mounting through holes 1512 are connected to the shear ring cavity 1501, and the other end of the third full-length tapered groove pin 303 is installed in the second mounting through hole 1512; The inner side wall of the locking ring sleeve cavity 1401 on the locking ring sleeve 14 is provided with an internal thread, and a locking ring 17 is sleeved on the outer side wall of the upper core shaft 1, and the locking ring 17 is threadedly connected to the inner side wall of the locking ring sleeve cavity 1401; The outer wall of the shear ring 15 is provided with a plurality of countersunk holes 1403 along the circumferential direction, the countersunk holes 1403 are communicated with the shear ring cavity 1501, a first set screw 18 is provided in the countersunk hole 1403, and the end of the first set screw 18 is fixedly provided in the locking ring 17, that is, the outer end of the first set screw 18 is provided in the locking ring sleeve 14, and the inner end of the first set screw 18 is provided in the locking ring 17, and at the same time, there is a certain gap between the inner end of the first set screw 18 and the outer wall of the upper core shaft 1; A plurality of third mounting through holes 1404 are evenly arranged along the circumferential direction on the lower portion of the outer wall of the shear ring 15 . The third mounting through holes 1404 are provided with second fixing screws 28 . The shear ring 15 is fixedly connected to the upper end of the connecting sleeve 27 via the second fixing screws 28 .

[0069] The lower end of the outer wall of the connecting sleeve 27 is provided with a third shoulder 271 along the circumferential direction; The upper piston 26 has an upper piston cavity 260 inside, the upper end of the upper piston 26 is concave to form a first upper piston cavity 261, and the lower end of the upper piston 26 is concave to form a second upper piston cavity 262, and the second upper piston cavity 262 and the first upper piston cavity 261 are respectively connected to the upper piston cavity 260; The upper piston 26 is sleeved on the outer side wall of the lower end of the connecting sleeve 27 through the first upper piston cavity 261, and the upper end of the upper piston 26 abuts against the outer side wall of the lower end of the third shaft shoulder 271; The upper piston 26 is sealed and sleeved on the lower end of the outer wall of the upper mandrel 1 through the upper piston cavity 260. The lower mandrel 25 has a lower mandrel cavity 250 inside. The upper part of the inner wall of the lower mandrel cavity 250 is concave to form a lower mandrel mounting recess 251. The upper end of the lower mandrel 25 is sleeved on the lower end outer wall of the upper mandrel 1 through the lower mandrel mounting recess 251. A fourth shoulder 252 is provided at the upper end of the outer wall of the lower core shaft 25 along the circumferential direction. The fourth shoulder 252 is sealed at the upper end inside the second upper piston cavity 262. The lower end of the inner wall of the second upper piston cavity 262 is concave to form an upper piston mounting recess 264.

[0070] A first sealing groove 263 is formed inwardly along the circumference of the inner wall of the upper piston cavity 260, and a first O-ring 241 and two first sealing back rings 231 are arranged in the first sealing groove 263, and the two first sealing back rings 231 are respectively located on both sides of the first O-ring 241. The upper piston cavity 260 is sealed and connected to the lower end of the outer wall of the upper core shaft 1 through the first O-ring 241 and the two first sealing back rings 231, so that the sealing performance of the lower end of the upper core shaft 1 combined with the upper piston 26 can be improved.

[0071] The outer wall of the fourth shaft shoulder 252 is concave inwardly along the circumferential direction to form a second sealing groove 253, in which a second O-ring 242 and two second sealing back rings 232 are arranged, and the two second sealing back rings 232 are respectively located on both sides of the second O-ring 242. The fourth shaft shoulder 252 is sealedly connected to the upper end of the inner wall of the second upper piston cavity 262 through the second O-ring 242 and the two second sealing back rings 232, thereby improving the sealing performance of the fourth shaft shoulder 252 combined with the upper piston 26, that is, improving the sealing performance of the upper end of the lower core shaft 25 combined with the upper piston 26.

[0072] The lower piston 20 has a lower piston cavity 2001 inside, a fifth shoulder 205 is provided on the upper part of the outer wall of the lower piston 20 along the circumferential direction, a sixth shoulder 206 is provided on the outer wall of the fifth shoulder 205 along the circumferential direction, and a fastening groove 2002 is uniformly provided on the fifth shoulder 205 below the sixth shoulder 206 along the circumferential direction; The lower end of the inner wall of the lower piston cavity 2001 extends outwardly in the circumferential direction to form a mounting protrusion 2003, and the inner wall of the mounting protrusion 2003 is concave in the circumferential direction to form a third sealing groove 204, and a third O-ring 243 and two third sealing back rings 233 are arranged in the third sealing groove 204, and the two third sealing back rings 233 are respectively located on both sides of the third O-ring 243, that is, the mounting protrusion 2003 is sealed and connected with the lower end of the outer wall of the lower core shaft 25 through the cooperation of the third O-ring 243 and the two third sealing back rings 233, that is, the lower inner wall of the lower end of the lower piston 20 is sealed and connected with the lower end of the outer wall of the lower core shaft 25, so that the connection between the lower inner wall of the lower end of the lower piston 20 and the lower end of the outer wall of the lower core shaft 25 can be made tighter, forming a sealed cavity so that the piston (that is, the upper piston 26 and the lower piston 20) moves and the packer is sealed; The lower end of the outer wall of the lower piston 20 is concave inwardly along the circumferential direction to form a fourth sealing groove 207, in which a fourth O-ring 244 and two fourth sealing back rings 234 are arranged, and the two fourth sealing back rings 234 are respectively located on both sides of the fourth O-ring 244, that is, the lower end of the outer wall of the lower piston 20 is sealed and connected with the lower end of the inner wall of the first lower joint installation groove 191 of the lower joint 19 through the cooperation of the fourth O-ring 244 and the two fourth sealing back rings 234, that is, the lower end of the lower piston 20 is sealed and connected with the upper end inner wall of the lower joint 19, so that the lower end of the lower piston 20 can be more closely connected with the upper end of the lower joint 19, forming a sealing cavity so that the piston (that is, the upper piston 26 and the lower piston 20) moves to seal the packer; The lower joint 19 has a lower joint cavity 190 inside, the upper end of the inner side wall of the lower joint cavity 190 is concave inward along the circumferential direction to form a first lower joint installation groove 191, the upper end of the inner side wall of the first lower joint installation groove 191 is concave inward along the circumferential direction to form a second lower joint installation groove 192, the inner side wall of the lower joint cavity 190 is located below the first lower joint installation groove 191 and is concave inward along the circumferential direction to form a third lower joint installation groove 193, the inner diameter of the third lower joint installation groove 193 is smaller than the inner diameter of the first lower joint installation groove 191; The lower joint 19 is sleeved on the lower end of the outer wall of the fifth shoulder 205 of the lower piston 20 through the second lower joint mounting groove 192, and a fastening through hole 194 is penetrated through the upper end of the outer wall of the lower joint 19, and the fastening through hole 194 corresponds to the fastening groove 2002; It also includes a set screw 29, one end of which is located in the fastening through hole 194, and the other end of which is located in the fastening groove 2002, that is, the upper end of the lower joint 19 is fixedly connected to the lower piston 20 through the set screw 29. Through the above design, that is, the upper end of the lower joint 19 is fixedly connected to the lower piston 20 through multiple set screws 29, when the packer is lowered to the required depth, the packer reaches the starting setting force after pressure, and the set screw 29 is cut off, thereby pushing the connecting sleeve 27, the locking ring sleeve 14, the first cone 601 and the second cone 602 to move, the first slip 501 and the second slip 502 are opened, the sealing assembly expands, and the packer is set.

[0073] An ultra-high temperature and ultra-high pressure gas-tight completion packer provided in an embodiment of the present invention is suitable for high temperature and high pressure wells or geothermal wells. When setting is required, the lower oil pipe of the packer is temporarily blocked and the setting can be achieved by directly pressurizing, and the setting can be completed in one trip of the tubing string. The specific process of achieving setting by pressurizing is as follows: During the pressure injection, the pressure enters the first piston chamber 1001 formed by the lower core shaft 25 and the upper piston 26 through the first pressure transmission hole 102 arranged on the outer wall of the lower end of the upper core shaft 1, and enters the second piston chamber 1002 formed by the lower core shaft 25 and the lower joint 19 through the second pressure transmission hole 255 set through the outer wall of the lower end of the lower core shaft 25, thereby pushing the upper piston 26 and the lower piston 20 to move upward, and the connecting sleeve 27 and the locking ring sleeve 14 push the locking ring 17 and then squeeze the sealing assembly. After the pressure reaches a certain value, the shear ring 15 shears the fourth full-length tapered groove pin 303 and cuts it off, and the second cava 502 and the first cava 501 are both in an open state, so that the sealing assembly is fully expanded to seal the annulus, that is, the space formed between the sealing casing and the oil pipe.

[0074] An ultra-high temperature and ultra-high pressure gas-sealed completion packer provided in an embodiment of the present invention is a high-performance permanent, millable production packer suitable for use under extreme working conditions through hydraulic setting.

[0075] An ultra-high temperature and ultra-high pressure gas-tight completion packer provided in an embodiment of the present invention was successfully tested for V0 (i.e., gas-tightness) at the Bazhou Tarim Testing Branch of Sinopec Jianghan Petroleum Engineering Co., Ltd. in December 2020. This is the first V0 test of a high-temperature and high-pressure packer with a pressure rating of 140 MPa and a temperature rating of 232°C in the domestic packer industry. For details, please refer to Fig.42 As shown, the red curve represents the temperature, the blue curve represents the annular pressure under the sealing assembly after the packer is set, and the purple curve represents the annular pressure on the sealing assembly after the packer is set. After the packer is set, the temperature is kept at 232°C, and the pressure is pressed from the center pipe, which is equivalent to a pressure of 140MPa under the annular space of the packer. The pressure is maintained for 15 minutes, and the upper pressure chamber is tested for no bubbles, and the test is qualified; the temperature is kept at 232°C, and the pressure is pressed from the upper pressure chamber of the packer at 140MPa. The pressure is maintained for 15 minutes, and the lower pressure chamber is tested for no bubbles, and the test is qualified; the temperature is kept at 232°C, and the pressure is pressed from the center pipe, which is equivalent to a pressure of 140MPa under the annular space of the packer. Compression and tensile loads are loaded respectively, and the pressure and load are maintained for 15 minutes. The upper pressure chamber is tested for no bubbles, and the test is qualified Pass; Keep warm at 232℃, load compression and tension respectively, keep load steady for 15min, and pass the test; Keep warm at 93℃, pressurize from the center pipe which is equivalent to the annulus pressure of 140MPa under the packer, load compression and tension respectively, keep pressure and load steady for 15min, detect no bubbles in the upper pressure chamber, and pass the test; Keep warm at 232℃, pressurize from the center pipe which is equivalent to the annulus pressure of 140MPa under the packer, load compression and tension respectively, keep pressure and load steady for 15min, detect no bubbles in the upper pressure chamber, and pass the test.

[0076] An embodiment of the present invention provides an ultra-high temperature and ultra-high pressure air-tight completion packer. The ultra-high temperature and ultra-high pressure air-tight completion packer is put into the well together with a matching ball seat. After being lowered to the designed position in the well, a matching sealing steel ball is put into the well. After the sealing steel ball reaches the position of the ball seat, a closed cavity is formed in the tubing string. The tubing string is pressurized in stages to the complete minimum sealing pressure of the packer. The packer is sealed under the action of pressure, and the upper and lower annular spaces at the packer are sealed, thereby creating suitable wellbore conditions for the completion and production of oil and gas wells.

[0077] An ultra-high temperature and ultra-high pressure gas-tight completion packer provided in an embodiment of the present invention has been successfully used in more than 30 wells in ultra-high temperature and ultra-high pressure blocks in the Sichuan and Chongqing regions, fully meeting the application needs of users and gaining unanimous recognition from users.

[0078] Finally, it should be noted that the above-described embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An ultra-high temperature and ultra-high pressure gas-sealed completion packer, characterized in that: It comprises an upper mandrel (1), a lower joint (19), a connecting sleeve (27), an upper piston (26), a lower mandrel (25) and a lower piston (20), wherein: The lower end of the upper mandrel (1) is arranged inside the upper end of the lower mandrel (25), and the lower end of the lower mandrel (25) is fixedly arranged inside the upper end of the lower joint (19); A first shaft shoulder (101) is provided on the upper portion of the outer wall of the upper core shaft (1), a slip support sleeve (2) is sleeved on the upper portion of the outer wall of the upper core shaft (1), and the upper end of the slip support sleeve (2) abuts against the lower end side wall of the first shaft shoulder (101), a first cone (601) is sleeved on the upper portion of the outer wall of the upper core shaft (1) below the slip support sleeve (2), a first slip (501) is sleeved on the outer wall of the first cone (601), the upper end of the first slip (501) abuts against the lower end of the slip support sleeve (2), and the first slip (501) is fixedly connected to the slip support sleeve (2) via a fastener; The upper part of the outer wall of the upper core shaft (1) is located below the first cone (601) and is sleeved with a sealing assembly, the outer wall of the upper core shaft (1) is located below the sealing assembly and is sleeved with a second cone (602), the outer wall of the second cone (602) is sleeved with a second cava (502), the outer wall of the upper core shaft (1) is located below the second cava (502) and is sleeved with a locking ring (14), the upper end of the locking ring (14) abuts against the lower end of the second cava (502); The connecting sleeve (27) is sleeved on the lower part of the outer wall of the upper core shaft (1), and the end of the upper end of the connecting sleeve (27) is fixedly arranged inside the lower end of the locking ring sleeve (14); the upper piston (26) is sealingly sleeved on the lower end of the outer wall of the upper core shaft (1); the upper end of the upper piston (26) is fixedly sleeved on the outer wall of the lower end of the connecting sleeve (27); and the upper end of the lower core shaft (25) is sealingly arranged on the inner wall of the upper piston (26); The lower piston (20) is sleeved on the outer side wall of the lower core shaft (25), and the upper end of the lower piston (20) is fixedly arranged on the inner side wall of the lower end of the upper piston (26); The lower joint (19) is fixedly sleeved on the lower end of the outer wall of the lower core shaft (25), the lower end of the lower piston (20) is sealingly arranged on the upper inner wall of the lower joint (19), and the lower end of the lower piston (20) is sealingly sleeved on the lower outer wall of the lower core shaft (25).

2. The ultra-high temperature and ultra-high pressure gas-tight completion packer according to claim 1, characterized in that: The slip support sleeve (2) has a slip support sleeve cavity (201) inside, the outer diameter of the slip support sleeve (2) is greater than the outer diameter of the first shaft shoulder (101), the lower part of the outer side wall of the slip support sleeve (2) is concave to form a positioning groove (202), the bottom of the positioning groove (202) is provided with a first positioning through hole (203), and the first positioning through hole (203) is connected to the slip support sleeve cavity (201).

3. The ultra-high temperature and ultra-high pressure gas-tight completion packer according to claim 2, characterized in that: The first slip (501) has a first slip cavity (511) inside, the outer diameter of the first slip (501) is smaller than the outer diameter of the slip support sleeve (2), one end of the outer side wall of the first slip (501) is concave to form a first clamping groove (512), and the first clamping groove (512) is connected to the first slip cavity (511); The fastener comprises a fixing key (3) and a fastening screw (4); one end of the fixing key (3) is located in the positioning groove (202), and the other end of the fixing key (3) is located in the first clamping groove (512); the fastening screw (4) passes through a fixing hole on the fixing key (3) and is then arranged in the first positioning through hole (203); the cava support sleeve (2) and the first cava (501) are fixedly connected to the upper core shaft (1) through the cooperation of the fixing key (3) and the fastening screw (4).

4. The ultra-high temperature and ultra-high pressure gas-tight completion packer according to any one of claims 1 to 3, characterized in that: The sealing assembly comprises a first rubber cylinder support ring (1110), a first end rubber cylinder (1201), an intermediate rubber cylinder (13), a second end rubber cylinder (1202) and a second rubber cylinder support ring (1120), which are arranged in sequence from top to bottom, wherein: A first support ring (701) and a first protective ring (801) are sleeved on the upper part of the outer wall of the upper core shaft (1) and located between the first cone (601) and the first rubber cylinder support ring (1110), wherein the first protective ring (801) is located below the first support ring (701), and the upper part of the first protective ring (801) is located inside the first support ring (701); The lower end of the first rubber cylinder support ring (1110) is sleeved on the upper end of the first end rubber cylinder (1201), the lower end of the first end rubber cylinder (1201) abuts against the lower end of the middle rubber cylinder (13), the lower end of the middle rubber cylinder (13) abuts against the upper end of the second end rubber cylinder (1202), and the lower end of the second end rubber cylinder (1202) is arranged inside the upper end of the second rubber cylinder support ring (1120).

5. The ultra-high temperature and ultra-high pressure gas-tight completion packer according to claim 3, characterized in that: The upper and lower ends of the first cone (601) are respectively a first end (611) and a second end (612); the outer diameter of the first end (611) is smaller than the outer diameter of the second end (612); the first end (611) is located inside a first slip cavity (511) on the first slip (501); and the second end (612) is located outside the first slip (501); The first cone (601) has a first cone cavity (613) inside, and the outer wall of the first cone (601) is provided with a first fixing groove (614) and a second fixing groove (615) along the circumferential direction, and the first slip (501) is sleeved on the first fixing groove (614) and the second fixing groove (615); The outer wall of the second end portion (612) is evenly provided with a plurality of first connecting through holes (616) along the circumferential direction, and a first full-length tapered groove pin (301) is provided in each of the first connecting through holes (616). The second end portion (612) is fixedly connected to the upper core shaft (1) through the cooperation between the first connecting through holes (616) and the first full-length tapered groove pin (301).

6. The ultra-high temperature and ultra-high pressure gas-tight completion packer according to claim 4, characterized in that: A second cone (602) is sleeved on the outer wall of the upper core shaft (1) below the second rubber tube support ring (1120), a second slip (502) is sleeved on the outer wall of the second cone (602), and a second support ring (702) and a second protective ring (802) are sleeved on the outer wall of the upper core shaft (1) between the second rubber tube support ring (1120) and the second cone (602), the second support ring (702) being located below the second protective ring (802); The lower end of the second protective ring (802) is located inside the upper end of the second support ring (702), and the upper end of the second cone (602) abuts against the outer side wall of the lower end of the second support ring (702); The upper and lower ends of the second cone (602) are respectively a third end (621) and a fourth end (622); the outer diameter of the third end (621) is greater than the outer diameter of the fourth end (622); the third end (621) is located above the upper end of the second cone (602); and the fourth end (622) is located inside the second cava cavity (521) in the second cava (502).

7. The ultra-high temperature and ultra-high pressure gas-tight completion packer according to claim 6, characterized in that: The locking ring sleeve (14) has a locking ring sleeve cavity (1401) inside, the upper inner side wall of the locking ring sleeve (14) is concave to form a first mounting groove (1411), the lower inner side wall of the locking ring sleeve (14) is concave to form a second mounting groove (1412), the second mounting groove (1412) and the first mounting groove (1411) are respectively connected to the locking ring sleeve cavity (1401), and the upper end of the connecting sleeve (27) is located in the second mounting groove (1412); The upper end of the locking ring sleeve (14) abuts against the outer side wall of the lower end of the second slip (502), a shear ring (15) is sleeved on the outer side wall of the upper core shaft (1), and the upper end of the shear ring (15) abuts against the side wall of the lower end of the second cone (602); A first installation cavity is formed between the lower end of the inner wall of the second slip (502) and the outer wall of the upper core shaft (1), and the upper part of the shear ring (15) is located in the first installation cavity; A second installation cavity (1421) is formed between the first installation groove (1411) of the locking ring sleeve (14) and the outer side wall of the upper core shaft (1), and the lower part of the shear ring (15) is located in the second installation cavity (1421).

8. The ultra-high temperature and ultra-high pressure gas-tight completion packer according to claim 7, characterized in that: A plurality of first mounting through holes (1402) are evenly arranged along the circumferential direction on the upper portion of the outer wall of the locking ring sleeve (14), and the first mounting through holes (1402) are connected to the first mounting groove (1411); It also includes a third full-length tapered groove pin (303), one end of the third full-length tapered groove pin (303) being installed in the first installation through hole (1402); The shear ring (15) has a shear ring cavity (1501) inside, a second shaft shoulder (1502) is arranged at the lower end of the outer wall of the shear ring (15) along the circumferential direction, a plurality of second mounting through holes (1512) are evenly arranged on the outer wall of the second shaft shoulder (1502) along the circumferential direction, the second mounting through holes (1512) are connected to the shear ring cavity (1501), and the other end of the third full-length tapered groove pin (303) is mounted in the second mounting through hole (1512); The inner side wall of the locking ring sleeve cavity (1401) on the locking ring sleeve (14) is provided with an internal thread, the outer side wall of the upper core shaft (1) is sleeved with a locking ring (17), and the locking ring (17) is threadedly connected to the inner side wall of the locking ring sleeve cavity (1401); The outer wall of the shear ring (15) is provided with a plurality of countersunk holes (1403) along the circumferential direction, the countersunk holes (1403) are in communication with the shear ring cavity (1501), a first set screw (18) is provided in the countersunk hole (1403), and an end of the first set screw (18) is fixedly disposed in the locking ring (17); A plurality of third mounting through holes (1404) are evenly arranged along the circumferential direction at the lower portion of the outer wall of the shear ring (15); the third mounting through holes (1404) are provided with second fixing screws (28); and the shear ring (15) is fixedly connected to the upper end of the connecting sleeve (27) via the second fixing screws (28).

9. The ultra-high temperature and ultra-high pressure gas-tight completion packer according to claim 8, characterized in that: A third shaft shoulder (271) is provided at the lower end of the outer side wall of the connecting sleeve (27) along the circumferential direction; The upper piston (26) has an upper piston cavity (260) inside, the upper end of the upper piston (26) is concave to form a first upper piston cavity (261), the lower end of the upper piston (26) is concave to form a second upper piston cavity (262), and the second upper piston cavity (262) and the first upper piston cavity (261) are respectively connected to the upper piston cavity (260); The upper piston (26) is sleeved on the outer wall of the lower end of the connecting sleeve (27) through the first upper piston cavity (261), and the upper end of the upper piston (26) abuts against the outer wall of the lower end of the third shaft shoulder (271); The upper piston (26) is sealed and sleeved on the lower end of the outer wall of the upper core shaft (1) through the upper piston cavity (260); the lower core shaft (25) has a lower core shaft cavity (250) inside; the upper part of the inner wall of the lower core shaft cavity (250) is concave to form a lower core shaft mounting recess (251); the upper end of the lower core shaft (25) is sleeved on the outer wall of the lower end of the upper core shaft (1) through the lower core shaft mounting recess (251); A fourth shoulder (252) is provided at the upper end of the outer wall of the lower core shaft (25) along the circumferential direction. The fourth shoulder (252) is sealingly arranged at the upper end inside the second upper piston cavity (262). The lower end of the inner wall of the second upper piston cavity (262) is concave to form an upper piston mounting recess (264).

10. The ultra-high temperature and ultra-high pressure gas-tight completion packer according to claim 1, characterized in that: The lower piston (20) has a lower piston cavity (2001) inside, a fifth shaft shoulder (205) is provided on the upper part of the outer wall of the lower piston (20) along the circumferential direction, a sixth shaft shoulder (206) is provided on the outer wall of the fifth shaft shoulder (205) along the circumferential direction, and fastening grooves (2002) are uniformly provided on the fifth shaft shoulder (205) below the sixth shaft shoulder (206) along the circumferential direction; The lower end of the inner wall of the lower piston cavity (2001) extends outwardly in the circumferential direction to form a mounting protrusion (2003), the inner wall of the mounting protrusion (2003) is concave inward in the circumferential direction to form a third sealing groove (204), and the lower end of the outer wall of the lower piston (20) is concave inward in the circumferential direction to form a fourth sealing groove (207).

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