CN219241880U - Small diameter expansion packer - Google Patents
Small diameter expansion packer Download PDFInfo
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- CN219241880U CN219241880U CN202320210445.7U CN202320210445U CN219241880U CN 219241880 U CN219241880 U CN 219241880U CN 202320210445 U CN202320210445 U CN 202320210445U CN 219241880 U CN219241880 U CN 219241880U
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- 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
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Abstract
The utility model relates to a small-diameter expansion packer, wherein an upper water through hole communicated with a central hole is formed in the upper end part of a central pipe, a lower water through hole communicated with the central hole is formed in the lower end part of the central pipe, and an annulus is arranged between a rubber cylinder and the central pipe. The small-diameter expansion packer provided by the utility model is characterized in that the upper water through hole and the lower water through hole as well as the annular space, the upper joint of the rubber sleeve and the lower joint of the rubber sleeve are arranged on the central tube, and the upper water through hole and the lower water through hole can be used for injecting water into the annular space or discharging water outwards, so that the expansion packer can expand more quickly when in setting, and can also drain water at two ends when in flushing, and can be set when in water injection and can be automatically unsealed when flushing, so that a flushing channel is not required to be arranged on the central tube, the outer diameter size of the packer can be reduced, and construction processes such as separate water injection, separate acidizing, channeling finding and the like can be realized when the inner diameter of the packer is phi 86-phi 88mm, and the problem of separate injection of small casing wells in oil fields can be solved.
Description
Technical Field
The utility model relates to an oilfield injection and production matching tool, in particular to a small-diameter expansion packer.
Background
As the oil field enters the later development stage, the casing damage condition of the water injection well is more and more serious, and the number of casing damage wells is increased year by year. The 4-in casing re-cementing process has short construction period, less investment and great development prospect, and can achieve the same effect of drilling and updating the well. Therefore, after the casing of the water injection well is damaged, a small casing is adopted to carry out secondary well cementation, the problem of casing damage and casing leakage is solved, and meanwhile, the development cost is reduced.
However, the conventional matched-expanded packer for the layered process, such as the multifunctional expanded packer disclosed in the patent document with the authority publication number of CN201738870U, is provided with a well flushing channel in order to realize well flushing after setting, and has a larger tool outer diameter, so that the expanded packer cannot be applied to a cased well with a small casing inner diameter of phi 86-phi 88mm, not only affects the split injection rate and the qualified rate of layered water injection of a water injection well, but also causes imbalance of block injection and production and has certain difficulty in stabilizing oil and water in an oil field. Due to the lack of matched underground tools and technologies, layered injection and production measures cannot be developed after production, and the potential of the layered injection and production measures is difficult to develop, so that the large-area implementation of a 4-in casing process is restricted. In order to further improve the water injection development effect, meet the fine water injection requirement of an oil field, fully utilize the well pattern of an old well, solve the new interlayer contradiction which is gradually outstanding due to the deformation of the casing, reduce the later development cost, and urgently develop the research of the secondary well cementation small casing split injection and testing and adjustment integrated process technology so as to adapt to the production requirement of the casing deformation well in the later development stage of the oil field.
Disclosure of Invention
The utility model aims to provide a small-diameter expansion packer, which solves the problem that the existing expansion packer cannot be suitable for oilfield small casing well injection.
The utility model discloses a small-diameter expansion packer, which comprises an oil pipe upper joint, a central pipe, an oil pipe lower joint and a rubber cylinder, wherein the central pipe is provided with a central hole, the rubber cylinder is sleeved on the central pipe, the oil pipe upper joint and the oil pipe lower joint are respectively and fixedly connected with the upper end and the lower end of the central pipe, the upper end and the lower end of the rubber cylinder are respectively and fixedly connected with the rubber cylinder upper joint and the lower end of the rubber cylinder lower joint to form a rubber cylinder assembly, the rubber cylinder assembly is sleeved on the central pipe, the rubber cylinder upper joint and the rubber cylinder lower joint are respectively sleeved on the upper end and the lower end of the central pipe, a pin is fixedly arranged between the oil pipe lower joint and the rubber cylinder lower joint, the upper end of the central pipe is provided with an upper water through hole communicated with the central hole, an annular space is arranged between the rubber cylinder and the central pipe, the upper end and the lower end of the annular space are respectively communicated with the upper water through hole and the lower water through hole, and the upper water through hole are filled with liquid, so that the pin is sheared and the rubber cylinder is expanded to realize sitting and sealing; the rubber cylinder can stop water injection through the central hole and elastically shrink and reset, and liquid in the ring is discharged into the central pipe from the upper water through hole and the lower water through hole, so that unsealing is realized.
The small-diameter expansion packer provided by the utility model is characterized in that the upper water through hole and the lower water through hole as well as the annular space, the rubber upper joint and the rubber lower joint which are matched are arranged on the central pipe, and the upper water through hole and the lower water through hole can be used for injecting water into the annular space or discharging water outwards, so that the expansion packer can expand more quickly when in setting, and can be used for draining water at two ends when in flushing, and can be used for setting when in flushing, and can be automatically unsealed when in flushing, so that a flushing channel is not required to be arranged on the central pipe, the outer diameter size of the packer can be reduced, and the construction processes of separate injection, separate acidification, channeling and the like can be realized for a sleeve damaged well with the inner diameter of phi 86-phi 88mm, so that the problem of separate injection of a small sleeve well in an oil field can be solved, the packer is reasonable in structural design, the sealing performance is reliable, and the water injection, separate acidification and channeling operation requirements of the sleeve-changing well can be met.
Further, the upper oil pipe joint and the lower oil pipe joint are respectively and fixedly connected with the upper end and the lower end of the central pipe through screw threads.
Further, the lower end part of the rubber barrel lower joint is fixedly provided with a limiting ring, the lower part of the central tube is provided with a limiting structure, and the limiting structure is used for limiting the upper and lower movable range of the limiting ring.
Further, limit structure includes spacing step, fender ring, and spacing step an organic whole sets up on the center tube and be in the top of spacing ring, keeps off the fixed suit of ring on the center tube and be in the below of spacing ring, leaves the movable space that supplies the spacing ring to reciprocate in upper and lower direction between spacing step and the fender ring, and spacing step, fender ring are used for blockking the upper and lower removal of spacing ring, limit the upper and lower movable range of spacing ring in the movable space to with the upper and lower movable range control of rubber cylinder subassembly lower extreme in the settlement scope.
Further, be provided with first upper seal circle between the upper joint of packing element and the oil pipe upper joint, be provided with the second upper seal circle between packing element upper joint and the packing element, upper and lower both sides of upper water hole are gone up in first upper seal circle, the upper and lower distribution of second upper seal circle, and first upper seal circle, second upper seal circle are used for preventing to go up water hole and the liquid in the ring outside leakage to the packing element.
Further, be provided with first lower sealing washer between packing element lower clutch and the oil pipe lower clutch, be provided with the second lower sealing washer between packing element lower clutch and the packing element, first lower sealing washer, second lower sealing washer are last to distribute in the upper and lower both sides of lower limbers down, and first lower sealing washer, second lower sealing washer are used for preventing down limbers and the liquid in the ring to the outside leakage of packing element.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present utility model;
in the figure:
1. an oil pipe upper joint; 2. a rubber cylinder upper joint; 3. a central tube; 31. a water through hole is formed on the upper part; 32. a lower water through hole; 4. a rubber cylinder; 5. a rubber cylinder lower joint; 6. a lower joint of the oil pipe; 7. a pin; 8. a limiting ring; 9. a baffle ring; 21. a first upper seal ring; 22. a second upper seal ring; 51. a first lower seal ring; 52. and a second lower sealing ring.
Detailed Description
As shown in fig. 1, an embodiment of the small-diameter expansion packer of the utility model comprises an oil pipe upper joint 1, a rubber cylinder upper joint 2, a central pipe 3, a rubber cylinder 4, a rubber cylinder lower joint 5, an oil pipe lower joint 6, a pin 7, a limiting ring 8 and a baffle ring 9. The central tube 3 has a central hole, which can be used for water injection.
The upper joint 1 of the oil pipe and the lower joint 6 of the oil pipe are respectively fixedly connected with the upper end and the lower end of the central pipe 3 through screw threads, the central pipe 3 between the upper joint 1 of the oil pipe and the lower joint 6 of the oil pipe is sequentially sleeved with the upper joint 2 of the rubber cylinder, the rubber cylinder 4 and the lower joint 5 of the rubber cylinder from top to bottom, the upper joint 2 of the rubber cylinder is fixedly connected with the upper end part of the rubber cylinder 4, the lower joint 5 of the rubber cylinder is fixedly connected with the lower end part of the rubber cylinder 4, and the upper joint 2 of the rubber cylinder, the rubber cylinder 4 and the lower joint 5 of the rubber cylinder form a rubber cylinder assembly.
The upper joint 2 of the rubber tube, rubber tube lower joint 5 are respectively sleeved at the upper and lower two ends of the central tube 3, the upper joint 2 of the rubber tube is fixed with the upper joint 1 of the oil tube (screw thread fixed connection), a pin 7 is fixedly arranged between the lower joint 6 of the oil tube and the lower joint 5 of the rubber tube, an upper water through hole 31 is formed in the upper end of the central tube 3, a lower water through hole 32 is formed in the lower end of the central tube 3, an annular space (annular gap) is formed between the rubber tube 4 and the central tube 3, and the upper and lower two ends of the annular space are respectively communicated with the upper water through hole 31 and the lower water through hole 32. A first upper sealing ring 21 is arranged between the upper joint 2 of the rubber cylinder and the upper joint 1 of the oil pipe, a second upper sealing ring 22 is arranged between the upper joint 2 of the rubber cylinder and the rubber cylinder 4, the first upper sealing ring 21 and the second upper sealing ring 22 are vertically distributed on the upper side and the lower side of the upper water through hole 31, and the first upper sealing ring 21 and the second upper sealing ring 22 are used for preventing the upper water through hole 31 and liquid in the annular space from leaking to the outside of the rubber cylinder. A first lower sealing ring 51 is arranged between the lower rubber tube joint 5 and the lower oil tube joint 6, a second lower sealing ring 52 is arranged between the lower rubber tube joint 5 and the rubber tube 4, the first lower sealing ring 51 and the second lower sealing ring 52 are vertically distributed on the upper side and the lower side of the lower water through hole 32, and the first lower sealing ring 51 and the second lower sealing ring 52 are used for preventing the lower water through hole 32 and liquid in the annular space from leaking to the outside of the rubber tube.
The lower end part of the rubber tube lower joint 5 is fixedly provided with a limiting ring 8, the lower part of the central tube 3 is integrally provided with a limiting step above the limiting ring 8 on the rubber tube lower joint 5, the lower part of the central tube 3 is fixedly sleeved with a baffle ring 9 below the limiting ring 8 on the rubber tube lower joint 5, a movable space for the limiting ring 8 to move up and down is reserved between the limiting step and the baffle ring 9 in the up-down direction, the limiting step and the baffle ring 9 are used for blocking the up-down movement of the limiting ring 8, the up-down movement range of the limiting ring 8 is limited in the movable space, and therefore the up-down movement range of the lower end part of the rubber tube assembly is controlled in a set range.
When the embodiment of the utility model is used, when in setting, the central pipe 3 is pressed, liquid enters the annular space between the rubber cylinder 4 and the central pipe 3 from the upper water through hole 31 and the lower water through hole 32 of the central pipe 3 respectively, the whole rubber cylinder assembly is subjected to expansion force of outward expansion, the pin 7 on the lower joint 5 of the rubber cylinder is sheared, and the rubber cylinder 4 is elastically expanded to realize setting. When the oil well is unsealed, the central tube 3 stops injecting liquid, the expansion acting force disappears, the rubber cylinder is reset and contracted by virtue of elastic force, the liquid in the annular space is discharged into the central hole of the central tube 3 from the upper water through hole 31 and the lower water through hole 32 of the central tube 3, the unsealing is realized, and after the unsealing, the oil well is washed by injecting liquid from the annular space between the outer side of the oil tube and the shaft, so that the problem of oil field small casing well split injection can be solved.
From the above, the packer of the utility model can be repeatedly set, water is injected after the setting, and the well is washed after the annotation sealing is stopped, and a well washing channel is not required to be arranged, so that the outer diameter is smaller. Meanwhile, water is injected from the upper water through hole and the lower water through hole to the upper side and the lower side of the annular space during seat sealing, the water injection speed is high, and the rubber cylinder starts to expand from the two ends, so that the upper stress and the lower stress of the rubber cylinder are balanced, and the success rate of seat sealing is improved; correspondingly, when in deblocking, water is drained from the upper water through hole and the lower water through hole, the drainage speed is high, and the upper stress and the lower stress are balanced, so that the resetting is facilitated; and the upper sealing ring and the lower sealing ring prevent water leakage, so that the sealing effect is good.
Claims (6)
1. The small-diameter expansion packer comprises an oil pipe upper joint (1), a central pipe (3), an oil pipe lower joint (6) and a rubber cylinder (4), wherein the central pipe (3) is provided with a central hole, the rubber cylinder (4) is sleeved on the central pipe (3), the oil pipe upper joint (1) and the oil pipe lower joint (6) are respectively and fixedly connected at the upper end and the lower end of the central pipe (3), the small-diameter expansion packer is characterized in that the upper end and the lower end of the rubber cylinder (4) are respectively and fixedly connected with the rubber cylinder upper joint (2) and the rubber cylinder lower joint (5) to form a rubber cylinder assembly, the rubber cylinder assembly is sleeved on the central pipe (3), the rubber cylinder upper joint (2) and the rubber cylinder lower joint (5) are respectively sleeved at the upper end and the lower end of the central pipe (3), a pin (7) is fixedly installed between the oil pipe lower joint (6) and the rubber cylinder lower joint (5), an upper water through hole (31) communicated with the central hole is formed at the upper end of the central pipe (3), a lower water through hole (32) communicated with the central hole is formed at the lower end of the central pipe (3), a lower water through hole (32) communicated with the upper end of the central pipe (3), and the upper end and lower water through hole (31) is formed between the upper end and lower end of the water through hole and lower water through hole (32 The rubber cylinder (4) is expanded to realize setting; the rubber cylinder (4) can stop water injection through the central hole and elastically shrink and reset, and liquid in the ring is discharged into the central tube (3) from the upper water through hole (31) and the lower water through hole (32) to realize unsealing.
2. The small-diameter expanding packer according to claim 1, wherein the upper oil pipe joint (1) and the lower oil pipe joint (6) are fixedly connected with the upper end and the lower end of the central pipe (3) through threads respectively.
3. The small-diameter expanding packer according to claim 1, wherein a limiting ring (8) is fixed at the lower end part of the rubber barrel lower joint (5), a limiting structure is arranged at the lower part of the central tube (3), and the limiting structure is used for limiting the upper and lower movable ranges of the limiting ring (8).
4. The small-diameter expanding packer according to claim 3, wherein the limiting structure comprises a limiting step and a baffle ring (9), the limiting step is integrally arranged on the central pipe (3) and is located above the limiting ring (8), the baffle ring (9) is fixedly sleeved on the central pipe (3) and is located below the limiting ring (8), a movable space for the limiting ring (8) to move up and down is reserved between the limiting step and the baffle ring (9) in the up-down direction, the limiting step and the baffle ring (9) are used for blocking the up-down movement of the limiting ring (8), the up-down movement range of the limiting ring (8) is limited in the movable space, and accordingly the up-down movement range of the lower end part of the rubber cylinder assembly is controlled in a set range.
5. The small-diameter expansion packer according to any one of claims 1-4, wherein a first upper sealing ring (21) is arranged between the upper joint (2) of the rubber cylinder and the upper joint (1) of the oil pipe, a second upper sealing ring (22) is arranged between the upper joint (2) of the rubber cylinder and the rubber cylinder (4), the first upper sealing ring (21) and the second upper sealing ring (22) are vertically distributed on the upper side and the lower side of the upper water through hole (31), and the first upper sealing ring (21) and the second upper sealing ring (22) are used for preventing the upper water through hole (31) and liquid in the annular space from leaking to the outside of the rubber cylinder.
6. The small-diameter expansion packer according to any one of claims 1-4, wherein a first lower sealing ring (51) is arranged between the lower rubber sleeve joint (5) and the lower oil pipe joint (6), a second lower sealing ring (52) is arranged between the lower rubber sleeve joint (5) and the rubber sleeve (4), the first lower sealing ring (51) and the second lower sealing ring (52) are vertically distributed on the upper side and the lower side of the lower water through hole (32), and the first lower sealing ring (51) and the second lower sealing ring (52) are used for preventing the lower water through hole (32) and liquid in the annular space from leaking to the outside of the rubber sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320210445.7U CN219241880U (en) | 2023-02-14 | 2023-02-14 | Small diameter expansion packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320210445.7U CN219241880U (en) | 2023-02-14 | 2023-02-14 | Small diameter expansion packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219241880U true CN219241880U (en) | 2023-06-23 |
Family
ID=86805807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320210445.7U Active CN219241880U (en) | 2023-02-14 | 2023-02-14 | Small diameter expansion packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219241880U (en) |
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2023
- 2023-02-14 CN CN202320210445.7U patent/CN219241880U/en active Active
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