CN113338840B - Oil field downhole packer with strong bearing capacity - Google Patents
Oil field downhole packer with strong bearing capacity Download PDFInfo
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- CN113338840B CN113338840B CN202110727132.4A CN202110727132A CN113338840B CN 113338840 B CN113338840 B CN 113338840B CN 202110727132 A CN202110727132 A CN 202110727132A CN 113338840 B CN113338840 B CN 113338840B
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- 230000007704 transition Effects 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims description 24
- 238000012856 packing Methods 0.000 claims description 20
- 230000009471 action Effects 0.000 claims description 12
- 239000003921 oil Substances 0.000 claims description 9
- 239000010720 hydraulic oil Substances 0.000 claims description 6
- -1 polytetrafluoroethylene Polymers 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 230000002708 enhancing effect Effects 0.000 abstract description 2
- 239000003129 oil well Substances 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 239000000463 material Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 230000001965 increasing effect Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000010030 laminating Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
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- Life Sciences & Earth Sciences (AREA)
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- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Gasket Seals (AREA)
Abstract
An oil field downhole packer with high bearing capacity relates to the technical field of oil well completion and comprises an upper joint, an upper sheath, a lower joint, a lower sheath, a central tube and a rubber cylinder, wherein the upper joint and the lower joint are respectively connected to the upper end and the lower end of the central tube through threads; a necking section with a smaller diameter is arranged in the middle of the central tube; on the necking section, the slot is positioned in the middle of the necking section, the upper side and the lower side of the slot are respectively provided with a support ring, and the inner side of each support ring is provided with a conical surface matched with the conical transition section; the support ring is made of rubber. The invention can support the rubber cylinder from the inner side of the rubber cylinder before the packer is installed, and can effectively enhance the capability of the packer for bearing the pressure difference between layers by enhancing the support at the end part of the rubber cylinder.
Description
Technical Field
The invention belongs to the technical field of oil well completion, and particularly relates to an oil field downhole packer with high bearing capacity.
Background
The packer is a well tool commonly used in the oil field production, and can divide an annular space between an oil pipe and a casing into two independent parts to prevent gas or liquid from flowing. There are various types of common packers, one of which is an expandable packer.
The structure of expanding packer includes center tube and packing element, and the packing element cover is in the outside of center tube, corresponds with the packing element inboard on the center tube and is provided with the slot, during the use, connects expanding packer at the lower extreme of oil pipe tubular column and transfers to the sleeve pipe in, then, injects the water under high pressure into the oil pipe tubular column, the water under high pressure via annular space between packing element and the center tube is got into to the slot, makes the packing element outwards inflation then, and the packing element laminating after the inflation is on the intraductal wall of casing to separate the space of both sides about with the packing element.
Compared with other types of packers, the expandable packer has the advantages of simple structure, reliable action and the like, and has the disadvantages that the rubber sleeve has poor capability of bearing the pressure difference between the upper part and the lower part, so that the application range of the expandable packer is seriously limited. Therefore, there is a need to develop a new type of expandable packer to solve the above problems.
Disclosure of Invention
In order to solve the technical problems in the background art, the invention provides the oil field downhole packer with strong pressure bearing capacity.
The technical problem solved by the invention is realized by adopting the following technical scheme: the invention provides an oil field downhole packer with strong bearing capacity, which comprises an upper joint, an upper sheath, a lower joint, a lower sheath, a central tube and a rubber tube, wherein the upper joint and the lower joint are respectively connected to the upper end and the lower end of the central tube through threads;
the middle part of the central tube is provided with a necking section with a smaller diameter, and the upper end and the lower end of the necking section are respectively connected with other sections on the central tube through a conical transition section;
on the necking section, the slot is positioned in the middle of the necking section, the upper side and the lower side of the slot are respectively provided with a support ring, and the inner side of each support ring is provided with a conical surface matched with the conical transition section;
the support ring is made of rubber;
the inner sides of the upper end and the lower end of the rubber cylinder are respectively provided with a fixed sleeve, the fixed sleeves are inserted into the inner sides of the rubber cylinder and are vulcanized and bonded with the rubber cylinder, the outer sides of the exposed ends of the two fixed sleeves are both provided with threads, and the upper sheath and the lower sheath are respectively connected on the two fixed sleeves through the threads;
a gap is reserved between the two fixing sleeves and the central pipe, and a gap is also reserved between the two ends of the rubber cylinder and the central pipe;
the upper end of the upper sheath is connected to the upper joint through threads, and the lower end of the lower sheath is in sliding sealing fit with the lower joint;
and a spring is arranged at the matching part of the lower sheath and the lower joint, and the lower sheath always keeps the movement trend of approaching the lower joint under the elastic force action of the spring.
As a preferred scheme, two sliding sleeves are arranged on the necking section and between the two support rings, the two sliding sleeves are respectively called a sliding sleeve a and a sliding sleeve B, the upper end face of the sliding sleeve a and the lower end face of the sliding sleeve B are respectively abutted against the two support rings, the sliding sleeve a and the sliding sleeve B are in sliding sealing fit with the outer surface of the necking section, two sealing points between the two sliding sleeves and the necking section are respectively positioned on the upper side and the lower side of the cut, and the sliding sleeve a and the sliding sleeve B are in sliding sealing fit.
Preferably, the support ring is an assembly comprising an outer hoop made of rubber and an inner support member arranged on the inner side of the outer hoop, the inner support member is integrally in a circular structure, and a plurality of radial slits are uniformly processed on the outer circumference of the circular structure.
Preferably, the inner supporting member is made of rubber.
Preferably, the inner supporting member is made of polytetrafluoroethylene.
As a preferred scheme, a hydraulic cavity is arranged in the support ring, and hydraulic oil is filled in the hydraulic cavity;
in the support ring, the hydraulic cavity is positioned at one side of the sliding sleeve A or the sliding sleeve B;
a narrow part is arranged in the hydraulic cavity, and the narrow part extends in the support ring in the direction away from the sliding sleeve A or the sliding sleeve B.
As a preferred scheme, in all the side walls which enclose the hydraulic cavity, the side walls which are parallel to the inner wall of the rubber sleeve, the outer wall of the central tube and the end face of the sliding sleeve are all thin-wall structures with equal wall thickness, and the wall thickness of the thin-wall structures is not more than 3 mm.
As a preferred scheme, short pipes are arranged on the outer sides of the support ring, the sliding sleeve A and the sliding sleeve B, and the sliding sleeve A and the sliding sleeve B are in sliding sealing fit with the inner surfaces of the short pipes;
a hydraulic cavity is clamped between the support ring positioned above and the sliding sleeve A, another hydraulic cavity is clamped between the support ring positioned below and the sliding sleeve B, and the two hydraulic cavities are filled with hydraulic oil;
a narrow part is arranged in the hydraulic cavity, and the narrow part extends towards the interior of the support ring in the support ring.
The invention has the beneficial effects that:
1. according to the invention, the necking section is arranged on the central pipe, and the support ring is arranged on the outer side of the necking section, so that the rubber sleeve can be supported from the inner side of the rubber sleeve before the packer is installed, and the capability of the packer for bearing the interlayer pressure difference can be effectively enhanced by enhancing the support of the end part of the rubber sleeve.
2. According to the invention, the two sliding sleeves capable of sliding in a sealing manner relatively are arranged between the two support rings, and the structure can divide the expansion sealing process of the rubber sleeve into two independent action processes, so that the support rings can be ensured to move in place, and the functions of the support rings can be fully exerted.
Particularly, when pouring into the water under high pressure in the center tube, water pressure can't be acted on the packing element immediately after passing the slot on the center tube, but acts on sliding sleeve A and sliding sleeve B earlier, makes sliding sleeve A and sliding sleeve B keep away from each other and promote two support rings respectively, and two support rings move to the both ends of packing element under the thrust effect, make the outside expansion of packing element tip through wedging effect. Meanwhile, after the sliding sleeve A and the sliding sleeve B are far away from each other to a certain degree, the sliding seal between the sliding sleeve A and the sliding sleeve B is invalid, so that the water pressure directly acts on the inner side of the rubber cylinder, and the rubber cylinder is integrally expanded.
3. In the invention, the support ring is composed of the outer hoop sleeve made of rubber and the inner support piece arranged at the inner side of the outer hoop sleeve, and the following effects are achieved: the outer hoop sleeve is made of rubber materials with lower hardness, so that sealing among the support ring, the inner wall of the rubber cylinder and the outer wall of the central pipe is guaranteed, the support ring always bears pressure applied by high-pressure water, and the stability of the support ring for the rubber cylinder is further guaranteed; the inner supporting piece is made of rubber materials or polytetrafluoroethylene with higher hardness, so that the supporting force of the supporting ring is increased; the radial cutting seam is processed at the outer edge of the inner supporting piece, so that the inner supporting piece can be uniformly broken in the diameter increasing process, and the inner wall of the rubber cylinder is indirectly and uniformly supported.
4. According to the invention, the hydraulic cavity with the narrow part is designed in the support ring, so that rubber solids on two sides of the narrow part are tightly attached to the central tube and the rubber cylinder under the action of hydraulic pressure, and the higher the hydraulic pressure is, the more tightly the rubber solids are attached. Thereby being beneficial to ensuring the sealing of the inner side and the outer side of the support ring.
In addition, set up hydraulic pressure chamber in the support ring and can make one side that the support ring is close to sliding sleeve A or sliding sleeve B possess easier deformation to improve the laminating nature of support ring and center tube outer wall and packing element inner wall. Simultaneously, after the laminating nature is guaranteed through the hydraulic pressure chamber, the solid part alright adopt the rubber material that hardness is higher relatively of support ring to also do benefit to the support dynamics that improves the support ring to the packing element.
5. According to the invention, by additionally arranging the short pipe and additionally arranging the sealing element between the short pipe and the two sliding sleeves, the hydraulic cavity in the support ring can be transferred to the outside of the support ring, and the action is more reliable while the same effect is achieved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of a second embodiment of an internal support structure for a packing element;
FIG. 3 is a schematic structural view of a third embodiment of an internal support structure for a packing element;
FIG. 4 is a cross-sectional view at A in FIG. 3;
FIG. 5 is a schematic structural view of a fourth embodiment of an internal support structure for a packing element;
FIG. 6 is a schematic structural view of a fifth embodiment of an internal support structure for a packing element;
fig. 7 is a structural schematic diagram of a sixth embodiment of the internal support structure of the rubber cylinder.
In the figure: 1. the device comprises an upper joint, 2, an upper sheath, 3, a fixing sleeve, 4, a rubber cylinder, 5, a central pipe, 6, a support ring, 7, a slot, 8, a necking section, 9, a lower sheath, 10, a spring, 11, a sliding sleeve A, 12, a sliding sleeve B, 13, an O-shaped sealing ring, 14, an outer hoop sleeve, 15, an inner supporting piece, 16, a radial cutting seam, 17, a hydraulic cavity, 18, a narrow part, 19, a short pipe, 20 and a lower joint.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
the first embodiment is as follows:
as shown in figure 1, the rubber tube sealing device comprises an upper joint 1, an upper sheath 2, a lower joint 20, a lower sheath 9, a central tube 5 and a rubber tube 4, wherein the upper joint 1 and the lower joint 20 are respectively connected to the upper end and the lower end of the central tube 5 through threads, the lower end of the upper sheath 2 and the upper end of the lower sheath 9 are respectively bound to the outer sides of the upper end and the lower end of the rubber tube 4, and a cutting seam 7 is arranged on the central tube 5 corresponding to the section of the rubber tube 4. The above is a common structure in the prior art, and is not described herein again.
As an important innovation point, the invention is provided with a necking section 8 in the middle of the central tube 5, the diameter of the necking section 8 is smaller than that of other sections of the central tube 5, and the upper end and the lower end of the necking section 8 are respectively connected with other sections on the central tube 5 through a conical transition section. On the necking section 8, the slot 7 is located in the middle of the necking section 8, the upper side and the lower side of the slot 7 are respectively provided with a support ring 6, and the inner side of the support ring 6 is provided with a conical surface matched with the conical transition section. The support ring 6 is made of rubber. After being pressed into the central tube 5, the pressure reaches the annular space between the necking section 8 and the rubber tube 4 through the slots 7, and pushes the two support rings 6 towards the upper side and the lower side respectively. The support rings 6 are made of rubber materials and can slide and seal with the outer wall of the central tube 5 and the inner wall of the rubber sleeve 4 at the same time, and under the action of water pressure, the two support rings 6 can slide between the central tube 5 and the rubber sleeve 4 and finally slide to two ends of the rubber sleeve 4. Under the effect of the cone transition section, the diameter of the support ring 6 is continuously increased while sliding, so that the two ends of the rubber cylinder 4 are supported from the inner side, the diameter of the two ends of the rubber cylinder 4 is increased after the two ends of the rubber cylinder are supported, and the two ends of the rubber cylinder are attached to the inner wall of the sleeve. The two ends of the rubber sleeve 4 are pre-supported, so that the capability of the packer for bearing the interlayer pressure difference can be effectively improved.
It should be noted that, in the above structure, the material of the support ring 6 needs to adopt rubber with higher hardness to achieve a relatively ideal support effect, and as a preferable scheme, the shore hardness value of the rubber should not be less than 80.
As shown in fig. 1, the inner sides of the upper and lower ends of the rubber cylinder 4 are respectively provided with a fixing sleeve 3, the fixing sleeves 3 are inserted into the inner sides of the rubber cylinder 4 and are vulcanized and bonded with the rubber cylinder 4, the outer sides of the exposed ends of the two fixing sleeves 3 are both provided with threads, and the upper sheath 2 and the lower sheath 9 are respectively connected to the two fixing sleeves 3 through the threads; the upper end of the upper sheath 2 is connected to the upper joint 1 through threads, and the lower end of the lower sheath 9 is in sliding sealing fit with the lower joint 20. The structure enables one end of the rubber cylinder 4 to be fixed, the other end of the rubber cylinder can freely slide along with expansion of the rubber cylinder 4, and compared with a traditional structure that two ends of the rubber cylinder 4 are fixed, the structure is beneficial to increasing the contact area between the rubber cylinder 4 and the inner wall of the sleeve, so that the pressure bearing capacity of the rubber cylinder 4 is further improved.
As shown in fig. 1, a spring 10 is arranged at the matching position of the lower sheath 9 and the lower joint 20, and the lower sheath 9 always keeps the moving trend of approaching the lower joint 20 under the elastic force of the spring 10. The spring 10 provides resistance to expansion of the glue cartridge 4, thereby urging the inner wall of the glue cartridge 4 into close contact with the outer surface of the support ring 6.
It should be noted that, in the above structure, a gap is left between the two fixing sleeves 3 and the central pipe 5, a gap is also left between the two ends of the rubber cylinder 4 and the central pipe 5, and in the downward movement process of the support ring 6 located below, the space below the support ring 6 is communicated with the space above the lower joint 20 through the gap. After the rubber sleeve 4 is expanded, the rubber sleeve 4 drives the lower sheath 9 to move upwards, so that negative pressure is generated in the communication space, and the negative pressure generates 'suction force' to further promote the support ring 6 positioned below to move towards the two ends of the rubber sleeve 4, or enhance the downward movement tendency of the support ring 6, or enhance the position stability of the support ring 6 at the end part of the rubber sleeve 4.
Example two:
the difference between the embodiment and the embodiment I is that a sliding sleeve A11 and a sliding sleeve B12 are additionally arranged.
As shown in fig. 2, in the present embodiment, two sliding sleeves, namely, a sliding sleeve a11 and a sliding sleeve B12, are disposed on the necking section 8 between the two support rings 6, an upper end face of the sliding sleeve a11 and a lower end face of the sliding sleeve B12 abut against the two support rings 6, the sliding sleeve a11 and the sliding sleeve B12 are both in sliding sealing fit with an outer surface of the necking section 8, two sealing points between the two sliding sleeves and the necking section 8 are located on upper and lower sides of the cut 7, and a sliding sleeve a11 and a sliding sleeve B12 are in sliding sealing fit. Through setting up sliding sleeve A11 and sliding sleeve B12, can divide into two independent action processes with the bloated seal process of packing element 4, be favorable to guaranteeing that support ring 6 moves in place, make the effect full play of support ring 6. Specifically, when high-pressure water is injected into the central pipe 5, the water pressure passes through the slot 7 on the central pipe 5 and then cannot act on the rubber sleeve 4 immediately, but acts on the sliding sleeve a11 and the sliding sleeve B12 firstly, so that the sliding sleeve a11 and the sliding sleeve B12 are far away from each other and respectively push the two support rings 6, the two support rings 6 move towards the two ends of the rubber sleeve 4 under the action of thrust, and the end part of the rubber sleeve 4 is expanded outwards through wedging action. Meanwhile, after the sliding sleeve A11 and the sliding sleeve B12 are far away from each other to a certain degree, the sliding seal between the sliding sleeve A11 and the sliding sleeve B12 is invalid, so that the water pressure directly acts on the inner side of the rubber cylinder 4, and the whole rubber cylinder 4 is expanded.
Example three:
the difference between this embodiment and the second embodiment is the structure of the support ring 6.
As shown in fig. 3 and 4, in this embodiment, the support ring 6 is an assembly including an outer ferrule 14 made of rubber and an inner support member 15 disposed inside the outer ferrule 14, the inner support member 15 is integrally formed in a circular ring structure, and a plurality of radial slits 16 are uniformly formed on an outer circumference of the circular ring structure. The above structure has the following effects: the outer hoop sleeve 14 is made of rubber materials with lower hardness, so that sealing between the support ring 6 and the inner wall of the rubber cylinder 4 and the outer wall of the central pipe 5 is guaranteed, the support ring 6 always bears pressure applied by high-pressure water, and the stability of the support ring 6 for the rubber cylinder 4 is guaranteed; the inner supporting piece 15 is made of rubber material or polytetrafluoroethylene with higher hardness, so that the supporting force of the supporting ring 6 is increased; the radial slits 16 are formed on the outer edge of the inner supporting member 15, so that the inner supporting member 15 can be uniformly broken in the diameter increasing process, and the inner wall of the rubber cylinder 4 can be indirectly and uniformly supported.
The inner supporting member 15 is made of rubber, and the rubber needs to have a high hardness, and as a preferable scheme, the shore hardness value of the rubber material should not be less than 100.
Preferably, the inner support member 15 is made of teflon, which has a higher hardness than rubber to generate a more reliable supporting force, and generates an excellent sealing performance with the rubber material.
Example four:
the difference between this embodiment and the second embodiment is the structure of the support ring 6.
As shown in fig. 5, in this embodiment, a hydraulic chamber 17 is disposed in the support ring 6, and the hydraulic chamber 17 is filled with hydraulic oil; in the support ring 6, the hydraulic cavity 17 is positioned at one side of the sliding sleeve A11 or the sliding sleeve B12; a narrowing 18 is provided in the hydraulic chamber 17, which narrowing 18 extends in the support ring 6 in a direction away from the sliding sleeve a11 or the sliding sleeve B12. In the present invention, by designing the hydraulic chamber 17 with the narrow part 18 inside the support ring 6, the rubber bodies on both sides of the narrow part 18 will be tightly attached to the central tube 5 and the rubber cylinder 4 under the action of hydraulic pressure, and the higher the hydraulic pressure is, the more tightly the rubber bodies are attached. Thereby being beneficial to ensuring the sealing of the inner side and the outer side of the support ring 6.
In addition, the hydraulic cavity 17 arranged in the support ring 6 can make one side of the support ring 6 close to the sliding sleeve A11 or the sliding sleeve B12 have easier deformation, thereby improving the adhesion between the support ring 6 and the outer wall of the central tube 5 and the inner wall of the rubber sleeve 4. Meanwhile, after the fitting performance is ensured through the hydraulic cavity 17, the solid part of the support ring 6 can be made of a rubber material with relatively higher hardness, so that the support force of the support ring 6 on the rubber barrel 4 is improved.
Preferably, in the side walls enclosing the hydraulic cavity 17, the side walls parallel to the inner wall of the rubber sleeve 4, the outer wall of the central tube 5 and the end face of the sliding sleeve are all thin-walled structures with equal wall thickness, and the wall thickness is not more than 3 mm. The thin-walled structure can ensure the flexibility of the outer wall of the hydraulic cavity 17. It should be noted that, in order to ensure the structural strength of the thin wall under the condition of a small wall thickness, a fiber framework made of glass fiber, aramid fiber and the like needs to be arranged in the thin wall, which is the prior art and is not described herein again.
Example five:
the difference between this embodiment and the second embodiment is the structure of the support ring 6 and the addition of the short tube 19.
In the present embodiment, as shown in fig. 6, the short tube 19 is arranged outside the support ring 6, the sliding sleeve a11 and the sliding sleeve B12, and the sliding sleeve a11 and the sliding sleeve B12 are in sliding sealing fit with the inner surface of the short tube 19;
a hydraulic cavity 17 is clamped between the supporting ring 6 positioned above and the sliding sleeve A11, another hydraulic cavity 17 is clamped between the supporting ring 6 positioned below and the sliding sleeve B12, and the two hydraulic cavities 17 are filled with hydraulic oil;
a narrowing 18 is arranged in said hydraulic chamber 17, which narrowing 18 extends inside the support ring 6 towards the inside of the support ring 6. In the invention, the short pipe 19 is additionally arranged, and the sealing element is additionally arranged between the short pipe 19 and the two sliding sleeves, so that the hydraulic cavity 17 in the support ring 6 can be transferred to the outside of the support ring 6, and the action is more reliable while the same effect is achieved.
Example six:
the difference between this embodiment and the first embodiment is the structure of the inner wall of the rubber cylinder 4.
As shown in fig. 7, in this embodiment, a conical surface matched with the support ring 6 is added to the inner wall of the rubber cylinder 4, so that the diameter of the rubber cylinder 4 after being supported is increased, and the outer wall of the rubber cylinder 4 can be attached to the inner wall of the sleeve more favorably.
Claims (8)
1. The utility model provides an oil field packer in pit that bearing capacity is strong, includes top connection (1), upper shield (2), lower clutch (20), lower sheath (9), center tube (5) and packing element (4), and top connection (1) and lower clutch (20) are respectively through threaded connection at the upper and lower both ends of center tube (5), and the outside at both ends about packing element (4) is retrained respectively to the lower extreme of upper shield (2) and the upper end of lower sheath (9), correspond with packing element (4) place district on center tube (5) and be provided with slot (7), its characterized in that:
the middle part of the central tube (5) is provided with a necking section (8) with a smaller diameter, and the upper end and the lower end of the necking section (8) are respectively connected with other sections on the central tube (5) through a conical transition section;
on the necking section (8), the slot (7) is positioned in the middle of the necking section (8), the upper side and the lower side of the slot (7) are respectively provided with a support ring (6), and the inner side of the support ring (6) is provided with a conical surface matched with the conical transition section;
the support ring (6) is made of rubber;
the inner sides of the upper end and the lower end of the rubber cylinder (4) are respectively provided with a fixed sleeve (3), the fixed sleeves (3) are inserted into the inner sides of the rubber cylinder (4) and are vulcanized and bonded with the rubber cylinder (4), the outer sides of the exposed ends of the two fixed sleeves (3) are both provided with threads, and the upper sheath (2) and the lower sheath (9) are respectively connected onto the two fixed sleeves (3) through the threads;
a gap is reserved between the two fixing sleeves (3) and the central pipe (5), and a gap is also reserved between the two ends of the rubber cylinder (4) and the central pipe (5);
the upper end of the upper sheath (2) is connected to the upper joint (1) through threads, and the lower end of the lower sheath (9) is in sliding sealing fit with the lower joint (20);
and a spring (10) is arranged at the matching part of the lower sheath (9) and the lower joint (20), and the lower sheath (9) always keeps the moving trend of approaching the lower joint (20) under the elastic force action of the spring (10).
2. The oilfield downhole packer with high pressure bearing capacity according to claim 1, characterized in that: on necking down section (8), be provided with two sliding sleeves between two support rings (6), be called sliding sleeve A (11) and sliding sleeve B (12) respectively, the up end of sliding sleeve A (11) and the lower terminal surface of sliding sleeve B (12) support respectively two support rings (6) on, sliding sleeve A (11) and sliding sleeve B (12) all with the surface sliding seal cooperation of necking down section (8) to two sealing points between two sliding sleeves and necking down section (8) are located respectively the upper and lower both sides of slot (7), are sliding seal cooperation between sliding sleeve A (11) and the sliding sleeve B (12).
3. The oilfield downhole packer with high pressure bearing capacity according to claim 2, wherein: the supporting ring (6) is a component and comprises an outer hoop sleeve (14) made of rubber and an inner supporting piece (15) arranged on the inner side of the outer hoop sleeve (14), the inner supporting piece (15) is integrally of a circular ring-shaped structure, and a plurality of radial cutting seams (16) are uniformly processed on the outer circumference of the circular ring-shaped structure.
4. The oilfield downhole packer with high pressure bearing capacity according to claim 3, wherein the packer comprises: the inner support piece (15) is made of rubber.
5. The oilfield downhole packer with high pressure bearing capacity according to claim 3, wherein the packer comprises: the inner support piece (15) is made of polytetrafluoroethylene.
6. The oilfield downhole packer with high pressure bearing capacity according to claim 2, wherein: a hydraulic cavity (17) is arranged in the support ring (6), and the hydraulic cavity (17) is filled with hydraulic oil;
in the support ring (6), the hydraulic cavity (17) is positioned at one side of the sliding sleeve A (11) or the sliding sleeve B (12);
a constriction (18) is arranged in the hydraulic chamber (17), the constriction (18) extending in the support ring (6) in a direction away from the sliding sleeve A (11) or the sliding sleeve B (12).
7. The oilfield downhole packer with high pressure bearing capacity according to claim 6, wherein the packer comprises: in each side wall enclosing the hydraulic cavity (17), side walls parallel to the inner wall of the rubber sleeve (4), the outer wall of the central pipe (5) and the end face of the sliding sleeve are all thin-walled structures with equal wall thickness, and the wall thickness of each thin-walled structure is not more than 3 mm.
8. The oilfield downhole packer with high pressure bearing capacity according to claim 2, wherein: short pipes (19) are arranged on the outer sides of the support ring (6), the sliding sleeve A (11) and the sliding sleeve B (12), and the sliding sleeve A (11) and the sliding sleeve B (12) are in sliding sealing fit with the inner surfaces of the short pipes (19);
a hydraulic cavity (17) is clamped between the support ring (6) positioned above and the sliding sleeve A (11), another hydraulic cavity (17) is clamped between the support ring (6) positioned below and the sliding sleeve B (12), and the two hydraulic cavities (17) are filled with hydraulic oil;
a narrowing (18) is arranged in the hydraulic chamber (17), the narrowing (18) extending in the support ring (6) towards the interior of the support ring (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110727132.4A CN113338840B (en) | 2021-06-29 | 2021-06-29 | Oil field downhole packer with strong bearing capacity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110727132.4A CN113338840B (en) | 2021-06-29 | 2021-06-29 | Oil field downhole packer with strong bearing capacity |
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| Publication Number | Publication Date |
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| CN113338840A CN113338840A (en) | 2021-09-03 |
| CN113338840B true CN113338840B (en) | 2021-12-17 |
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| CN113847018A (en) * | 2021-09-30 | 2021-12-28 | 于婷婷 | General pilot production tool for packing off earth formation |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6431274B1 (en) * | 2000-06-23 | 2002-08-13 | Baker Hughes Incorporated | Well packer |
| CA2365218A1 (en) * | 2001-12-14 | 2003-06-14 | Vitold P. Serafin | Open hole straddle tool |
| CN100390371C (en) * | 2006-03-01 | 2008-05-28 | 潘昌德 | Compressed high-temperature packer with gas propelling |
| CN102011560B (en) * | 2010-11-04 | 2013-04-24 | 中国石油天然气股份有限公司 | Bidirectional pressure-bearing packer |
| CN102121367A (en) * | 2011-01-30 | 2011-07-13 | 蒯泽明 | Underground steam injection sealing, heat insulation and compensation integrated device |
| US9127539B2 (en) * | 2011-10-28 | 2015-09-08 | Halliburton Energy Services, Inc. | Downhole packer assembly having a selective fluid bypass and method for use thereof |
| CN103184850B (en) * | 2011-12-29 | 2015-12-02 | 安东石油技术（集团）有限公司 | Two-way setting hanging packer and preparation method thereof and pit shaft hoop packing method |
| CN104790902A (en) * | 2015-04-08 | 2015-07-22 | 阜新市石油工具厂 | Protection mechanism of rubber sleeve of expansion type packer, rubber sleeve with protection mechanism and packer |
| CN105089544B (en) * | 2015-08-31 | 2017-08-04 | 中国石油天然气股份有限公司 | A kind of pressure-bearing casing protective packer |
| CN205089277U (en) * | 2015-11-13 | 2016-03-16 | 成都托克密封件有限责任公司 | A high -temperature glue section of thick bamboo |
| CN105696966B (en) * | 2016-04-27 | 2017-12-19 | 东营市福利德石油科技开发有限责任公司 | Antiscour packer |
| CN107882532B (en) * | 2017-12-26 | 2023-12-05 | 大庆市天德忠石油科技有限公司 | Packer with high compression resistance |
| CN209855745U (en) * | 2019-04-04 | 2019-12-27 | 上海优强石油科技有限公司 | Rubber sleeve supporting device of large-diameter-expansion open hole packer |
| CN111255410A (en) * | 2020-03-13 | 2020-06-09 | 陈艳艳 | Packer |
| CN111927380B (en) * | 2020-08-13 | 2020-12-22 | 东营凯博石油科技有限责任公司 | Long-acting double-rubber-barrel double-deblocking expansion packer |
| CN111791457B (en) * | 2020-09-09 | 2020-11-20 | 东营鑫华莲石油机械有限公司 | External packer for casing |
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