CN117489293B - Packer with double sealing structures - Google Patents
Packer with double sealing structures Download PDFInfo
- Publication number
- CN117489293B CN117489293B CN202311847077.8A CN202311847077A CN117489293B CN 117489293 B CN117489293 B CN 117489293B CN 202311847077 A CN202311847077 A CN 202311847077A CN 117489293 B CN117489293 B CN 117489293B
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- assembly
- expansion
- cone
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- 238000007789 sealing Methods 0.000 title claims abstract description 88
- 229920001971 elastomer Polymers 0.000 claims abstract description 40
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- 230000004044 response Effects 0.000 claims abstract description 7
- 238000004873 anchoring Methods 0.000 claims description 22
- 210000000078 claw Anatomy 0.000 claims description 14
- 230000009977 dual effect Effects 0.000 claims description 11
- 238000012856 packing Methods 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 4
- 230000000712 assembly Effects 0.000 claims 2
- 238000000429 assembly Methods 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000002347 injection Methods 0.000 abstract description 6
- 239000007924 injection Substances 0.000 abstract description 6
- 230000007774 longterm Effects 0.000 abstract description 3
- 230000035882 stress Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 229910001039 duplex stainless steel Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920006168 hydrated nitrile rubber Polymers 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002572 peristaltic effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000246 remedial effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/122—Multiple string packers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
The invention discloses a packer with a double sealing structure, which comprises a core pipe; the rubber sleeve is sleeved on the peripheral wall of the core tube, the pressurizing piston assembly is arranged on the outer surface of the core tube, and the pressurizing uplink assembly and the pressurizing downlink assembly are arranged at two ends of the pressurizing piston assembly; the pressurized uplink assembly is configured to move towards the rubber cylinder in response to an external force so as to cause the rubber cylinder to be stressed to radially expand; further comprises: the second sealing component is sleeved on the peripheral wall of the core tube and positioned at the downstream of the pressure increasing descending component; the second sealing component comprises an expansion cone, an expansion sealing ring and a thrust ring from top to bottom along the stress direction; the expansion cone responds to the thrust of the pressurizing descending assembly and moves towards the thrust ring, so that the sealing ring is radially expanded, and primary sealing is achieved. The packer adopts a double-sealing structure, ensures the sealing reliability, and the sealing units distributed up and down can balance the stress of internal components of the packer during gas injection and gas production, thereby improving the long-term sealing reliability of the packer.
Description
Technical Field
The invention relates to the technical field of underground packers for gas storage wells, in particular to a packer with a double-sealing structure.
Background
A packer is a downhole tool used to separate different oil and water layers in a wellbore and is required to withstand a certain pressure differential. The packer needs to meet the requirements of the oil recovery process. The well casing can be put down to a preset position of the well casing, is tightly sealed, has durability when being needed underground, and can be smoothly lifted out when needed.
Based on the requirements of the packer construction environment and technical parameters, the packer in the prior art has the following difficulties:
1. the large-size packer is needed, no mature product with corresponding size exists at home and abroad, and the processing difficulty is high;
2. the sealing space is large, when the bottom pressure of an injection and production gas well is 7-9MPa, the packer bears an upward load of about 46-59t, the dead weight of the 13 inch sleeve is comprehensively considered to be 48.8t, and the downward pressure of the sleeve protection liquid is 500m to be 32.5t. Long-term exposure to alternating loads presents a significant challenge to the reliability of the anchoring of the slips;
3. the change of the injection and production air pressure easily causes slight peristaltic movement of the packer, and the sealing component is easy to fail; 4. the existing equipment for lifting the tubular column under pressure cannot meet the large-size requirement of the equipment, and a large-span reducing plugging tool (13-3/8 'is arranged in the tubular column to plug 18-5/8' well bore) is not used for temporarily plugging the well bore.
Therefore, how to solve the above-mentioned problems is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the foregoing, it is an object of the present invention to provide a packer with a dual seal structure, which comprises:
a core tube; the rubber sleeve is sleeved on the peripheral wall of the core tube, the pressurizing piston assembly is arranged on the outer surface of the core tube, and the pressurizing uplink assembly and the pressurizing downlink assembly are arranged at two ends of the pressurizing piston assembly; the booster up-going assembly is configured to move towards the packing element in response to an external force so as to cause radial expansion of the packing element under force; wherein, still include: a second sealing member sleeved on the outer peripheral wall of the core tube and positioned downstream of the pressurizing downlink assembly; the second sealing component comprises an expansion cone, an expansion sealing ring and a thrust ring from top to bottom along the stress direction; the expansion cone is sleeved on the core pipe, and the expansion sealing ring is sleeved on the downstream end of the expansion cone; the thrust ring abuts a downstream end of the expansion seal ring; and the expansion cone responds to the thrust of the pressure increasing descending assembly and moves towards the thrust ring, so that the sealing ring is radially expanded, and primary sealing is realized.
In certain embodiments, the dual seal packer further comprises: an anchoring slip assembly disposed between the packing element and the second sealing member.
In certain embodiments, the dual seal packer comprises: a claw pushing cylinder and a first locking ring; the claw pushing barrel is sleeved on the outer surface of the core tube; one end is abutted against the expansion cone, and the other end is stressed by the thrust output by the pressurizing piston assembly to move towards the expansion cone; the first lock ring is of a ladder-shaped structure and is arranged between the core tube and the expansion cone to prevent the expansion cone from moving away from the expansion seal ring.
In some embodiments, the packer with the double sealing structure further comprises an outer cylinder sleeved on the outer surface of the claw pushing cylinder and connected with the claw pushing cylinder part through a first shear pin; the first shear pin is sheared when reaching a first pressure threshold, the claw pushing cylinder is released to push the expansion cone to move towards the expansion sealing ring, and the expansion sealing ring radially expands to be attached to the inner wall of the sleeve.
In certain embodiments, in the dual seal packer, the second seal member further comprises: a support ring disposed between the thrust ring and the core tube for supporting the thrust ring; and one end of the centralizer is connected with the thrust ring through bolts, and the other end of the centralizer is connected with the supporting ring through bolts.
In some embodiments, in the packer with the double sealing structure, the expansion cone is a cone member, and the inner surface of the tip part of the expansion cone is in sealing connection with the core pipe through an O-shaped sealing ring; the outer surface of the tip part of the expansion cone is in sliding fit with the expansion sealing ring; the expansion sealing ring is a metal and rubber composite sealing ring.
In some embodiments, the packer with the double sealing structure further comprises an upper joint arranged at one end of the rubber cylinder, the rubber cylinder is connected with the upper joint in a sealing manner through a first locking cap, and the upper joint is fixed on the core pipe.
In certain embodiments, the dual seal packer comprises: the lower joint, the upper cone, the lower cone, the joint, the second locking ring and the second locking cap; the lower joint is arranged at the other end of the rubber cylinder; the rubber cylinder is connected with the lower joint in a sealing way through a second locking cap; the lower cone configured to urge the anchoring slip assembly radially outwardly, the lower cone being threadably connected to the joint; the upper vertebral body is arranged between the lower joint and the lower vertebral body; the upper cone responds to the thrust transmitted by the lower cone to push the lower joint to move towards the rubber cylinder, and the rubber cylinder is extruded by the upper joint and the lower joint to radially expand and is attached to the inner wall of the sleeve to realize secondary sealing; the second locking ring is of a ladder-shaped structure and is arranged between the lower cone and the core tube and used for preventing the lower cone from moving reversely.
In some embodiments, the anchoring slip assembly in the dual seal packer is a cage slip assembly that is secured to the inferior vertebral body by a second shear pin that is sheared to a second pressure threshold, releasing the anchoring slip assembly.
In certain embodiments, in the dual seal packer, the booster piston assembly further comprises: an input pipe for injecting a pressurizing liquid or gas; the input pipe is used for communicating the piston cavity of the booster piston assembly, and the pressure of the piston cavity is increased, so that the booster upper assembly and the booster lower assembly can be driven to move in opposite directions.
The beneficial effects of the invention are as follows:
the invention discloses a packer with a double-sealing structure, wherein the packer adopts a primary seal and a secondary seal, so that the sealing reliability is ensured, and the primary seal adopts a composite sealing ring structure consisting of an expandable cone and a rubber sealing ring; the secondary seal adopts a combined compression rubber cylinder structure, so that the overall sealing performance of the packer can be further enhanced; the primary seal and the secondary seal pack the slip assembly in the middle, can completely block the corrosive environment from contacting the slip assembly, effectively protect the slip assembly, increase the anchoring reliability of the packer, and the sealing units distributed up and down can balance the stress of the internal components of the packer during gas injection and gas production, thereby improving the long-term sealing reliability of the packer.
Drawings
FIG. 1 is a schematic view of a first construction of a packer with a dual seal configuration in accordance with the present invention;
FIG. 2 is a schematic illustration of the structure of an input pipe in a packer with dual seal configuration in accordance with the present invention;
FIG. 3 is a schematic view of a second construction of a dual seal packer according to the invention.
In the figure: the hydraulic pressure type hydraulic pressure generating device comprises a core tube, a 2-pressurizing piston assembly, a 3-expansion cone, a 4-expansion sealing ring, a 5-thrust ring, a 6-rubber cylinder, a 7-input tube, an 8-input hole, a 9-outer cylinder, a 10-claw pushing cylinder, an 11-first shear pin, a 12-first locking ring, a 13-upper joint, a 14-lower joint, a 15-upper cone, a 16-lower cone, a 17-joint, a 18-second locking ring, a 19-anchoring slip assembly, a 20-second shear pin, a 21-first locking cap, a 22-second locking cap, a 23-centralizer and a 24-supporting ring.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some of the embodiments of the present invention.
As shown in fig. 1 to 3, a packer with a double seal structure, comprising: a core tube 1; the rubber sleeve 6 is sleeved on the peripheral wall of the core tube 1, the pressurizing piston assembly 2 is arranged on the outer surface of the core tube 1, and the pressurizing uplink assembly and the pressurizing downlink assembly are arranged at two ends of the pressurizing piston assembly 2; the booster up-going assembly is configured to move towards the packing element 6 in response to an external force, such that radial expansion of the packing element 6 is forced; the packer comprises: a second sealing member sleeved on the peripheral wall of the core tube 1 and positioned downstream of the pressurizing downlink assembly; the second sealing component comprises an expansion cone 3, an expansion sealing ring 4 and a thrust ring 5 from top to bottom along the stress direction; the expansion cone 3 is sleeved on the core tube 1, and the expansion sealing ring 4 is sleeved on the downstream end of the expansion cone 3; the thrust ring 5 abuts the downstream end of the expansion seal ring 4; the expansion cone 3 moves towards the thrust ring 5 in response to the thrust of the pressure increasing descending assembly, so that the expansion sealing ring 4 radially expands to realize primary sealing. The expansion cone 3 is of a cone structure with a thick upper part and a thin lower part, and when the expansion cone 3 moves towards the thrust ring 5 in response to the thrust of the pressure increasing descending assembly, the sealing ring 4 is extruded to be larger so as to realize radial expansion, thereby realizing primary sealing.
The core tube 1 is put into a preset position in the well, the pressurizing descending assembly moves towards the second sealing member in response to the pushing force of the pressurizing piston assembly 2, and the expansion cone 3 enables the expansion sealing ring 4 to radially expand, so that primary sealing is achieved.
In one embodiment, the core tube 1 is comprised of 2507 duplex stainless steel with good corrosion resistance and mechanical properties.
In another embodiment, the packer includes an anchoring slip assembly 19 disposed between the packing element 6 and the second sealing member.
In one embodiment, the anchoring slip assembly 19 adopts a barrel-shaped bidirectional slip structure, the contact area of the anchor teeth and the sleeve is large and uniform, the anchoring force is high, the anchoring is reliable, the bearing load is large, the damage to the sleeve is small, the top and bottom bouncing can be prevented at the same time, and the carburization quenching heat treatment is adopted, so that the hardness, the wear resistance and the corrosion resistance of the metal surface are improved.
In one embodiment, the rubber cylinder 6 adopts (hydrogenated nitrile rubber) HNBR and PTFE compression type combined protection rubber cylinder 6, and the end face bevel angle, the anti-protruding structure and the gasket (PTFE) are designed to prevent the rubber cylinder 6 from expanding towards two sides of a gap in the expansion process, so that the rubber cylinder 6 is extruded towards the center as much as possible, the sealing effect is better, the compression distance is increased, and the contact stress of a sleeve is improved and maintained, so that good sealing performance is obtained.
In one embodiment, the booster downstream component comprises: a jaw push cylinder 10 and a first locking ring 12; the claw pushing cylinder 10 is sleeved on the outer surface of the core tube 1; one end is abutted against the expansion cone 3, and the other end is forced to move towards the expansion cone 3 by the thrust output by the booster piston assembly 2; the first locking ring 12 is in a stepped structure and is arranged between the core pipe 1 and the expansion cone 3, so that the expansion cone 3 is prevented from moving away from the expansion sealing ring 4.
In one embodiment, the booster upstream assembly includes: an outer cylinder 9 which is sleeved on the outer surface of the claw pushing cylinder 10 and is connected with the claw pushing cylinder 10 through a first shear pin 11; the first shear pin 11 is sheared when reaching a first pressure threshold, the claw pushing cylinder 10 is released to push the expansion cone 3 to move towards the expansion sealing ring 4, and the expansion sealing ring 4 radially expands to be attached to the inner wall of the sleeve.
In one embodiment, the first pressure threshold is 7mpa to 8mpa, and when the first pressure threshold is reached, the primary seal starts to be started until the primary seal is completely realized.
In another embodiment, the second sealing member further comprises: a support ring 24 disposed between the thrust ring 5 and the core tube 1 for supporting the thrust ring 5; and a centralizer 23 having one end bolted to the thrust ring 5 and the other end bolted to the support ring 24.
In one or more embodiments of the present disclosure, the expansion cone 3 is a cone member, and the inner surface of the tip portion of the expansion cone 3 is hermetically connected to the core tube 1 through an O-ring; the outer surface of the tip portion of the expansion cone 3 slidingly engages the expansion seal ring 4.
In one or more embodiments of the present disclosure, the expansion seal ring is a metal and rubber composite seal ring.
In one or more embodiments of the present disclosure, the upper connector 13 is disposed at one end of the rubber 6, the rubber 6 is sealingly connected to the upper connector 13 through a first locking cap 21, and the upper connector 13 is fixed to the core tube 1.
In one or more embodiments of the present disclosure, the booster upstream assembly further includes: lower hub 14, upper cone 15, lower cone 16, hub 17, second locking ring 18 and second locking cap 22; the lower joint 14 is arranged at the other end of the rubber cylinder 6; the rubber cylinder 6 is in sealing connection with the lower joint 14 through a second locking cap 22; the lower cone 16 configured to urge the anchoring slip assembly 19 radially outwardly, the lower cone 16 being threadably connected to the fitting 17; the upper vertebral body 15 is arranged between the lower joint 14 and the lower vertebral body 16; the upper cone 15 responds to the thrust transmitted by the lower cone 16 to push the lower joint 14 to move towards the rubber cylinder 6, the rubber cylinder 6 is extruded by the upper joint 13 and the lower joint 14 to radially expand and is attached to the inner wall of the sleeve, so that secondary sealing is realized; the second locking ring 18, which is a stepped structure, is disposed between the lower cone 16 and the core tube 1, for preventing the lower cone 16 from moving in the opposite direction.
The primary seal is positioned at the lower part of the anchoring slip component 19, a composite sealing ring structure of the expansion cone 3 and the expansion sealing ring 4 is adopted, the rubber part of the expansion sealing ring 4 is expanded radially and is permanently attached, and the expansion cone 3 and the sleeve are locked, so that the situation of gummosis and ageing sealing loss after long-time pressure bearing of the rubber is effectively avoided, and a long-acting and reliable sealing environment can be established. A secondary seal is located on the upper portion of the anchoring slip assembly 19 to further enhance the overall sealing performance of the packer.
In one or more embodiments of the present disclosure, the rubber 6 is sealingly connected to the upper joint 13 by a first locking cap 21 and is sealingly connected to the lower joint 14 by a second locking cap 22.
In one or more embodiments of the present disclosure, the anchoring slip assembly 19 is a cage slip assembly that is secured to the inferior vertebral body 16 by a second shear pin 20, the second shear pin 20 being sheared when a second pressure threshold is reached, releasing the anchoring slip assembly 19.
In one embodiment, the second pressure threshold is 128MPa and when the second pressure threshold is reached, the secondary seal starts to activate until the secondary seal is fully achieved.
In one or more embodiments of the present disclosure, the booster piston assembly 2 further includes: an input pipe 7 for injecting a pressurizing liquid or gas; the input pipe 7 is used for communicating the piston cavity of the pressurizing piston assembly, and the pressure of the piston cavity is increased so as to drive the pressurizing upward assembly and the pressurizing downward assembly to move in opposite directions. As shown in fig. 2, the input pipe 7 is provided with a plurality of input holes 8, when pressurized liquid or gas is injected into the core pipe 1, the pressurized liquid or gas enters the input pipe 7 through the input holes 8, and enters the piston cavity of the pressurizing piston assembly from the input pipe 7, so that the pressurizing upward assembly and the pressurizing downward assembly are driven to move in opposite directions.
As shown in fig. 3, the present invention provides a large-sized packer with a double sealing structure, which is specifically as follows, the length of the core pipe 1 is 5220mm, the outer diameter thereof is 340mm, and the drift diameter thereof is 312mm; the outer diameter of the upper joint 13 is 433mm, and the inner diameter thereof is 340mm; the first locking cap 21 has an outer diameter of 403mm and an inner diameter of 363mm; the length of the rubber cylinder 6 is 429.25mm, the maximum outer diameter is 430mm, the minimum outer diameter is 403mm, and the inner diameter is 363mm; the length of the lower joint 14 is 292mm, the outer diameter thereof is 433mm, the maximum inner diameter thereof is 405mm, and the minimum inner diameter thereof is 367mm; the maximum outer diameter of the upper cone 15 is 433mm, the minimum outer diameter is 405mm, and the inner diameter is 370mm; the anchoring slip assembly 19 has a length of 420mm, an outer diameter of 429mm and a minimum inner diameter of 370mm; the length of the lower cone 16 is 684mm, the maximum outer diameter is 433mm, and the minimum inner diameter is 343mm; the outer diameter of the joint 17 is 433mm, the maximum inner diameter thereof is 371mm, and the minimum inner diameter thereof is 343mm; the length of the pressurizing piston assembly 2 is 290mm, and the outer diameter of the pressurizing piston assembly is 371mm; the length of the outer cylinder 9 is 1016mm, the inner diameter of the outer cylinder 9 is 398mm, and the outer diameter of the outer cylinder 9 is 433mm; the expansion cone 3 has a length of 709mm and an inner diameter of 372mm.
Late packer seal failure remedial action
1. A bridge plug is put into the lower part of the packer by a cable or a continuous oil pipe, and a cable punching tool is put into the upper part of the packer for punching;
2. injecting cement or chemical plugging agent into the upper section of the packer from the 13-3/8 sleeve to seal the section of annulus at the upper part of the packer instead of the packer;
3. drilling out the cement and bridge plug left by the 13-3/8 sleeve by using a continuous oil pipe, opening an injection and production channel, and continuing production;
4. when well repair conditions are met, the upper pipe column of the packer can be cut, the packer pipe column is put in the upper part again, and sealing is reestablished.
In this embodiment, for convenience of use and manufacture, the first locking cap 21 and the second locking cap 22 are vertically symmetrical, and the upper cone 15 and the lower cone 16 are vertically symmetrical.
The primary seal, the secondary seal and the anchoring slip component 19 mechanisms of the packer are all designed with special locking mechanisms for locking, so that the locking is convenient and reliable, the structure is simple and efficient, the locking is not interfered with each other, the packer can be effectively permanently locked in a working state, and the packer can not be influenced by alternating load during later injection and production.
Finally, it is noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present invention, and that other modifications and equivalents thereof by those skilled in the art should be included in the scope of the claims of the present invention without departing from the spirit and scope of the technical solution of the present invention.
Claims (6)
1. A packer with a dual seal configuration, comprising:
a core tube (1); the device comprises a rubber cylinder (6) sleeved on the peripheral wall of a core tube (1), an upper joint (13) arranged at one end of the rubber cylinder (6), a pressurizing piston assembly (2) arranged on the outer surface of the core tube (1), and pressurizing upward assemblies and pressurizing downward assemblies arranged at two ends of the pressurizing piston assembly (2); the booster up-going assembly is configured to move towards the rubber cylinder (6) in response to an external force, so that the rubber cylinder (6) is stressed to radially expand; the rubber cylinder (6) is connected with the upper joint (13) in a sealing way through a first locking cap (21), and the upper joint (13) is fixed on the core tube (1);
wherein, still include: a second sealing member which is sleeved on the peripheral wall of the core tube (1) and is positioned at the downstream of the pressurizing downlink component; the second sealing component comprises an expansion cone (3), an expansion sealing ring (4) and a thrust ring (5) from top to bottom along the stress direction; the expansion cone (3) is sleeved on the core tube (1), and the expansion sealing ring (4) is sleeved on the downstream end of the expansion cone (3); the thrust ring (5) abuts the downstream end of the expansion seal ring (4); the expansion cone (3) responds to the thrust of the pressure increasing descending assembly to move towards the thrust ring (5), so that the sealing ring (4) is radially expanded, and primary sealing is achieved; an anchoring slip assembly (19) disposed between the packing element (6) and the second sealing member;
the booster downstream assembly includes: a claw push cylinder (10) and a first locking ring (12); the claw pushing cylinder (10) is sleeved on the outer surface of the core tube (1); one end is abutted against the expansion cone (3), and the other end is stressed by the thrust output by the pressurizing piston assembly (2) to move towards the expansion cone (3); the first lock ring (12) is of a ladder-shaped structure and is arranged between the core tube (1) and the expansion cone (3) to prevent the expansion cone (3) from moving away from the expansion seal ring (4);
the supercharging uplink assembly comprises: a lower joint (14), an upper cone (15), a lower cone (16), a joint (17), a second locking ring (18) and a second locking cap (22); the lower joint (14) is arranged at the other end of the rubber cylinder (6); the rubber cylinder (6) is connected with the lower joint (14) in a sealing way through a second locking cap (22); -the lower cone (16) configured to urge the anchoring slip assembly (19) radially outwardly, the lower cone (16) being threadedly connected with the joint (17); the upper vertebral body (15) is arranged between the lower joint (14) and the lower vertebral body (16); the upper cone (15) responds to the thrust transmitted by the lower cone (16) to push the lower joint (14) to move towards the rubber cylinder (6), and the rubber cylinder (6) is extruded by the upper joint (13) and the lower joint (14) to be radially expanded and attached to the inner wall of the sleeve so as to realize secondary sealing; the second locking ring (18) is of a ladder-shaped structure and is arranged between the lower cone (16) and the core tube (1) and used for preventing the lower cone (16) from moving reversely.
2. The packer with the double sealing structure according to claim 1, further comprising an outer cylinder (9) sleeved on the outer surface of the claw pushing cylinder (10) and connected with the claw pushing cylinder (10) through a first shear pin (11);
the first shear pin (11) is sheared when reaching a first pressure threshold, the claw pushing cylinder (10) is released to push the expansion cone (3) to move towards the expansion sealing ring (4), and the expansion sealing ring (4) radially expands to be attached to the inner wall of the casing.
3. The packer with double seal structure of claim 1, wherein the second seal member further comprises: a support ring (24) disposed between the thrust ring (5) and the core tube (1) for supporting the thrust ring (5);
and a centralizer (23) having one end bolted to the thrust ring (5) and the other end bolted to the support ring (24).
4. The packer with the double sealing structure according to claim 1, characterized in that the expansion cone (3) is a cone member, and the inner surface of the tip portion of the expansion cone (3) is sealingly connected with the core tube (1) by an O-ring; the outer surface of the tip part of the expansion cone (3) is in sliding fit with the expansion sealing ring (4); the expansion sealing ring (4) is a metal and rubber composite sealing ring.
5. The packer with double seal structure of claim 1, wherein the anchoring slip assembly (19) is a cage slip assembly that is secured to the lower vertebral body (16) by a second shear pin (20), the second shear pin (20) being sheared when a second pressure threshold is reached, releasing the anchoring slip assembly (19).
6. The packer with double seal structure of claim 1, wherein the booster piston assembly (2) further comprises: an input pipe (7) for injecting a pressurized liquid or gas; the input pipe (7) is used for being communicated with a piston cavity of the pressurizing piston assembly, and the pressure of the piston cavity is increased, so that the pressurizing uplink assembly and the pressurizing downlink assembly can be driven to move in opposite directions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311847077.8A CN117489293B (en) | 2023-12-29 | 2023-12-29 | Packer with double sealing structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311847077.8A CN117489293B (en) | 2023-12-29 | 2023-12-29 | Packer with double sealing structures |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117489293A CN117489293A (en) | 2024-02-02 |
| CN117489293B true CN117489293B (en) | 2024-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311847077.8A Active CN117489293B (en) | 2023-12-29 | 2023-12-29 | Packer with double sealing structures |
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| CN (1) | CN117489293B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4018272A (en) * | 1975-04-07 | 1977-04-19 | Brown Oil Tools, Inc. | Well packer apparatus |
| CN102337860A (en) * | 2010-09-03 | 2012-02-01 | 中国石油大学(北京) | Packer |
| CN104963652A (en) * | 2015-06-30 | 2015-10-07 | 中国石油集团渤海钻探工程有限公司 | Self-sealing compressed packer |
| CN108661569A (en) * | 2018-07-06 | 2018-10-16 | 陕西双威石油机械有限公司 | A kind of environment protection multifunctional oil extraction process tubular column |
| CN114575773A (en) * | 2020-12-01 | 2022-06-03 | 中国石油化工股份有限公司 | Tail pipe suspension device with top packer and tail pipe suspension assembly |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2815848A1 (en) * | 2013-02-25 | 2014-08-25 | Resource Well Completion Technologies Inc. | Wellbore packer and method |
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2023
- 2023-12-29 CN CN202311847077.8A patent/CN117489293B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4018272A (en) * | 1975-04-07 | 1977-04-19 | Brown Oil Tools, Inc. | Well packer apparatus |
| CN102337860A (en) * | 2010-09-03 | 2012-02-01 | 中国石油大学(北京) | Packer |
| CN104963652A (en) * | 2015-06-30 | 2015-10-07 | 中国石油集团渤海钻探工程有限公司 | Self-sealing compressed packer |
| CN108661569A (en) * | 2018-07-06 | 2018-10-16 | 陕西双威石油机械有限公司 | A kind of environment protection multifunctional oil extraction process tubular column |
| CN114575773A (en) * | 2020-12-01 | 2022-06-03 | 中国石油化工股份有限公司 | Tail pipe suspension device with top packer and tail pipe suspension assembly |
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|---|---|
| CN117489293A (en) | 2024-02-02 |
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