CN218522647U - Integrated ball seat sliding sleeve structure - Google Patents
Integrated ball seat sliding sleeve structure Download PDFInfo
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- CN218522647U CN218522647U CN202123012284.0U CN202123012284U CN218522647U CN 218522647 U CN218522647 U CN 218522647U CN 202123012284 U CN202123012284 U CN 202123012284U CN 218522647 U CN218522647 U CN 218522647U
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- 230000004323 axial length Effects 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 21
- 230000007704 transition Effects 0.000 claims description 4
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
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Abstract
The utility model provides an integrated form ball seat sliding sleeve structure, its integrated level is high, simple structure, and a plurality of sliding sleeves can be opened in a bowling, has guaranteed the efficiency of fracturing operation and the stability of assembly. It includes: the valve sleeve assembly comprises a valve sleeve body and a plurality of rupture discs; an inner sleeve assembly including an inner sleeve body; an outer sleeve; the valve sleeve body and the outer sleeve are fixedly connected at opposite ends, and an inner sleeve body mounting cavity is formed in the middle section area of the connected inner cavity in the axial direction; the inner cavity of the middle part of the axial length of the inner sleeve body is provided with a limiting cavity, the diameter of the limiting cavity is equal to that of the fracturing ball, a plurality of radial moving structures are distributed on the periphery of the outer ring of the limiting cavity, and an inner annular wall of the axial middle section area of the cavity part of the outer sleeve is provided with a concave first annular groove.
Description
Technical Field
The utility model relates to a technical field of ball valve structure specifically is an integrated form ball seat sliding sleeve structure.
Background
With the gradual maturity of oil and gas development, increasing the permeability of oil and gas fields and realizing the maximization of the utilization of reservoir resources thereof have become the focus of the petroleum industry. Wherein, staged fracturing of the horizontal well is a key stimulation measure. The fracturing technology is to artificially form cracks in a reservoir and improve an oil and gas discharge channel. The development of the ball throwing type fracturing sliding sleeve in the staged fracturing process is mature. However, in the existing common sliding sleeve structure, the ball seat needs to be assembled with the inner sleeve separately, the process is complex, and the downhole use has failure risks. Therefore, a stable and reliable ball seat sliding sleeve structure is urgently needed.
Disclosure of Invention
To the above problem, the utility model provides an integrated form ball seat sliding sleeve structure, its integrated level is high, simple structure, and a plurality of sliding sleeves can be opened to a bowling, has guaranteed the efficiency of fracturing operation and the stability of assembly.
An integrated ball seat sliding sleeve structure, which is characterized by comprising:
a valve sleeve assembly including a valve sleeve body, a plurality of rupture discs;
an inner sleeve assembly including an inner sleeve body;
an outer sleeve;
the valve sleeve body and the outer sleeve are fixedly connected at opposite ends, and an inner sleeve body mounting cavity is formed in the middle section area of the connected inner cavity in the axial direction;
the inner cavity in the middle of the axial length of the inner sleeve body is provided with a limiting cavity, the diameter of the limiting cavity is equal to the diameter of a fracturing ball, a plurality of radial moving structures are distributed around the outer ring of the limiting cavity, an inner ring wall in the axial middle section area of the cavity part of the outer sleeve is provided with a concave first ring groove, and the radial outer end of the radial moving structure is tightly attached to the non-concave ring groove part of the cavity part of the outer sleeve and the radial inner end of the radial moving structure is inwards protruded on the inner wall of the limiting cavity to form an axial stopping for the fracturing ball under the condition that the starting pressure of the sliding sleeve is not reached;
at least one circle of fracturing holes are annularly distributed on the initial part of the outer circumference of the valve sleeve cavity part of the valve sleeve body, each fracturing hole is internally provided with a rupture disc in a plugging manner, and the inner sleeve body is inserted into the valve sleeve cavity part of the valve sleeve;
the valve sleeve body towards the one end outer lane circumference of outer sleeve still is provided with at least one first screw hole, a second screw hole, the outer wall position that the inner skleeve body corresponds to first screw hole is provided with the guide way, the guide way is arranged along the axial, the position that the inner skleeve body corresponds to the second screw hole is provided with the cartridge via hole, prevents that the turn-round screw passes in the guide way that first screw hole got into the axial setting, and the shear screw passes second screw hole and gets into the cartridge via hole.
It is further characterized in that:
the outer ring circumferences of the inner sleeve body, corresponding to the outer sides of the two axial ends of the guide groove in the length direction, are respectively provided with a first sealing ring and a second sealing ring, the first sealing ring and the second sealing ring ensure the pressure sealing of the working end of the sliding sleeve in an unopened state, and the outer ring surfaces of the first sealing ring and the second sealing ring are respectively clung to the corresponding inner ring wall of the valve sleeve body;
the radial moving structure is a stop screw, the sliding sleeve is not started, namely the shear screw is not sheared by pressure, the radial inner end of the stop screw protrudes out of the inner wall of the limiting cavity and abuts against the fracturing ball, the radial outer end of the stop screw is attached to the corresponding inner annular wall of the outer sleeve, and two ends of the limiting cavity are connected to the large-diameter conduction cavities at two ends through conical transition holes respectively;
the clamping ring is fixedly sleeved on the outer ring periphery of the limiting cavity, which is axially close to the outer sleeve, the first concave ring groove is provided with a shaft shoulder ring which is inwards convex in the radial direction, the surface of the shaft shoulder ring, which faces the valve sleeve body, is of a guide inclined surface structure, the surface of the shaft shoulder ring, which faces the outer sleeve, is of a vertical surface, the clamping ring is ensured to enter the area, which is close to the outer sleeve, of the first concave ring groove along the guide inclined surface structure, and the vertical surface ensures that the whole inner sleeve body is stopped by the clamping ring and cannot reversely move towards the valve sleeve body again;
the opposite ends of the valve sleeve body and the outer sleeve are connected into a whole through a thread structure.
After the structure of the utility model is adopted, during assembly, the inner sleeve body is plugged into the valve sleeve cavity part of the valve sleeve, then the anti-rotation screw passes through the first threaded hole and enters the guide groove which is axially arranged, the shear screw passes through the second threaded hole and enters the plug-in through hole, the outer sleeve is fixedly connected with the valve sleeve body in a plug-in manner in opposite direction, the rear end of the inner sleeve body is arranged at the outer sleeve cavity part of the outer sleeve, and the rear end of the inner sleeve body and the spigot end face of the outer sleeve cavity part leave an axial distance; at the moment, the pressure is lifted to a specified value, the shear screw is radially broken, and the fracturing ball drives the inner sleeve body to move towards the outer sleeve until the fracturing hole is exposed, so that the follow-up fracturing working condition is met; when the inner sleeve body continues to move backwards, the radial moving structure moves to the first annular groove area of indent, and the radial inner end of the radial moving structure is protruded outwards under the extrusion of the fracturing ball, and the fracturing ball is released to enter the next stage of movement, and the integrated level is high, the structure is simple, and a plurality of sliding sleeves can be opened by throwing the ball once, so that the efficiency of fracturing operation and the stability of assembly are ensured.
Drawings
Fig. 1 is a schematic cross-sectional front view of the present invention in an uncrushed state;
fig. 2 is a schematic sectional view of the front view in the fracturing state of the present invention;
FIG. 3 is a cross-sectional structural schematic view of the valve sleeve body;
FIG. 4 is a cross-sectional structural view of the inner sleeve body;
FIG. 5 is a cross-sectional structural view of the outer sleeve;
FIG. 6 is an enlarged view of a portion of FIG. 5 at A;
the names corresponding to the sequence numbers in the figure are as follows:
the valve sleeve comprises a valve sleeve body 10, a fracturing hole 11, a first threaded hole 12, a second threaded hole 13, a rupture disc 20, an inner sleeve body 30, a limiting cavity 31, a guide groove 32, an insertion through hole 33, a tapered transition hole 34, a large-diameter through cavity 35, an outer sleeve 40, a concave first annular groove 41, a shaft shoulder ring 42, a guide inclined surface structure 421, a vertical surface 422, an inner sleeve body installation cavity 50, a valve sleeve cavity part 51, an outer sleeve cavity part 52, a fracturing ball 60, a radial moving structure 70, an anti-rotation screw 80, a shear screw 90, a first sealing ring 100, a second sealing ring 110, a clamping ring 120, a valve sleeve assembly 200 and an inner sleeve assembly 300.
Detailed Description
An integrated ball seat sliding sleeve structure, see fig. 1-6, comprising:
a valve sleeve assembly 200 comprising a valve sleeve body 10, a plurality of rupture discs 20;
an inner sleeve assembly 300 including an inner sleeve body 30;
an outer sleeve 40;
opposite ends of the valve sleeve body 10 and the outer sleeve 40 are fixedly connected, and an inner sleeve body mounting cavity 50 is formed in the middle section area of the connected inner cavity in the axial direction, the length of the inner sleeve body 30 is smaller than that of the inner sleeve body mounting cavity 50, and the inner sleeve body mounting cavity 50 comprises a valve sleeve cavity part 51 and an outer sleeve cavity part 52;
a limiting cavity 31 is arranged in the middle inner cavity of the axial length of the inner sleeve body 30, the diameter of the limiting cavity 31 is equal to that of the fracturing ball 60, a plurality of radial moving structures 70 are annularly distributed on the outer ring circumference of the limiting cavity 31, an inner ring wall of the axial middle section area of the outer sleeve cavity part 52 is provided with a concave first ring groove 41, the radial outer end of the radial moving structure 70 clings to the non-concave ring groove part of the outer sleeve cavity part 52 under the state that the pressure of the sliding sleeve starting is not reached, and the radial inner end of the radial moving structure 70 is inwards protruded on the inner wall of the limiting cavity 31 to form an axial stop for the fracturing ball 60;
at least one circle of fracturing holes 11 are annularly distributed on the initial part of the outer circumference of the valve sleeve cavity part 51 of the valve sleeve body 10, a rupture disc 20 is plugged in each fracturing hole 11, and the inner sleeve body 30 is inserted into the valve sleeve cavity part 51 of the valve sleeve body 10;
the valve sleeve body 10 is further provided with at least one first threaded hole 12 and one second threaded hole 13 in the periphery of one end of the valve sleeve body 10 facing the outer sleeve 40, a guide groove 32 is formed in the outer wall of the inner sleeve body 30 corresponding to the first threaded hole 12, the guide groove 32 is arranged along the axial direction, an insertion through hole 33 is formed in the position of the inner sleeve body 30 corresponding to the second threaded hole 13, an anti-rotation screw 80 penetrates through the first threaded hole 12 to enter the guide groove 32 which is axially arranged, and a shearing screw 90 penetrates through the second threaded hole 13 to enter the insertion through hole 33.
In a specific embodiment, the outer circumferences of the two axial ends of the inner sleeve body 30 corresponding to the guide groove 32 in the length direction are respectively provided with a first sealing ring 100 and a second sealing ring 110, the first sealing ring 100 and the second sealing ring 110 are arranged at two ends of the circumference formed by the rupture disc 20 in an uncrushed state to ensure that the working end is pressure-sealed in an unopened state of the sliding sleeve, and the outer annular surfaces of the first sealing ring 100 and the second sealing ring 110 are respectively tightly attached to the corresponding inner annular walls of the valve sleeve body 10;
the radial moving structure 70 is specifically a stop screw, when the sliding sleeve is not started, that is, the shear screw 90 is not sheared by pressure, a radial inner end of the stop screw protrudes from an inner wall of the limit cavity 31 to abut against the fracturing ball 60, a radial outer end of the stop screw is attached to a corresponding inner annular wall of the outer sleeve 40, and two ends of the limit cavity 31 are connected to large-diameter conduction cavities 35 at two ends through tapered transition holes 34 respectively;
the clamping ring 120 is fixedly sleeved on the outer ring periphery of the limiting cavity 31, which is axially close to the outer sleeve 40, the concave first ring groove 41 is provided with a shaft shoulder ring 42 which is inwards convex in the radial direction, the surface of the shaft shoulder ring 42, which faces the valve sleeve body 10, is a guide inclined surface structure 421, the surface of the shaft shoulder ring 42, which faces the outer sleeve 40, is a vertical surface 422, so that the clamping ring 120 is ensured to enter the area, which is close to the outer sleeve 40, of the concave first ring groove 41 along the guide inclined surface structure 421, and the vertical surface 422 ensures that the whole inner sleeve body 30 is stopped by the clamping ring 120 and cannot reversely move towards the valve sleeve body 10 again;
the opposing ends of the valve sleeve body 10 and the outer sleeve 40 are connected as a single body by a screw structure.
In the specific implementation: the initial part of the outer circumference of the valve sleeve cavity 51 of the valve sleeve body 10 is annularly provided with a circle of fracturing holes 11, the outer circumference of one end of the valve sleeve body 10 facing the outer sleeve 40 is further provided with a first threaded hole 12 and a second threaded hole 13, and the first threaded hole 12 and the second threaded hole 13 are respectively arranged at two radial ends.
The outer circumference of the inner sleeve 30 is provided with positioning ring grooves corresponding to the positions of the first seal ring 100, the second seal ring 110 and the clamping ring 120, so as to ensure stable and reliable assembly.
The working principle is as follows, during assembly, an inner sleeve body is plugged into a valve sleeve cavity part of a valve sleeve, then an anti-rotation screw penetrates through a first threaded hole and enters a guide groove which is axially arranged, a shear screw penetrates through a second threaded hole and enters a plug-in through hole, an outer sleeve is fixedly connected with the opposite end of the valve sleeve body in an opposite plug-in mode, the rear end of the inner sleeve body is arranged at the outer sleeve cavity part of the outer sleeve, an axial distance is reserved between the rear end of the inner sleeve body and a spigot end face of the outer sleeve cavity part, when the valve sleeve is started, a corresponding fracturing ball is put in, and the fracturing ball blocks axial movement due to a radial movement structure, so that the fracturing ball blocks a limiting cavity; at the moment, the pressure is increased to a specified value, the shear screw is radially broken, and the fracturing ball drives the inner sleeve body to move towards the outer sleeve until the fracturing hole is exposed, so that the subsequent fracturing working condition is met; when the inner sleeve body continues to move backwards, the radial moving structure moves to the first annular groove area of indent, and the radial inner end of the radial moving structure is protruded outwards under the extrusion of the fracturing ball, and the fracturing ball is released to enter the next stage of movement, and the integrated level is high, the structure is simple, and a plurality of sliding sleeves can be opened by throwing the ball once, so that the efficiency of fracturing operation and the stability of assembly are ensured.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. An integrated ball seat sliding sleeve structure, comprising:
a valve sleeve assembly including a valve sleeve body, a plurality of rupture discs;
an inner sleeve assembly including an inner sleeve body;
an outer sleeve;
the valve sleeve body and the outer sleeve are fixedly connected at opposite ends, and an inner sleeve body mounting cavity is formed in the middle section area of the connected inner cavity in the axial direction;
a limiting cavity is arranged in the middle inner cavity of the axial length of the inner sleeve body, the diameter of the limiting cavity is equal to that of the fracturing ball, a plurality of radial moving structures are annularly distributed on the periphery of the outer ring of the limiting cavity, an inner ring wall of an axial middle section area of a cavity part of the outer sleeve is provided with a concave first ring groove, the radial outer end of each radial moving structure clings to a non-concave ring groove part of the cavity part of the outer sleeve under the condition that the starting pressure of the sliding sleeve is not reached, and the radial inner end of each radial moving structure is inwards protruded on the inner wall of the limiting cavity to form an axial stop for the fracturing ball;
at least one circle of fracturing holes are annularly distributed on the initial part of the outer circumference of the valve sleeve cavity part of the valve sleeve body, each fracturing hole is internally provided with a rupture disc in a plugging manner, and the inner sleeve body is inserted into the valve sleeve cavity part of the valve sleeve;
the valve sleeve body is provided with at least one first screw hole, one second screw hole towards the one end outer ring week of outer sleeve, the outer wall position that the inner skleeve body corresponds to first screw hole is provided with the guide way, the guide way is arranged along the axial, the position that the inner skleeve body corresponds to the second screw hole is provided with the cartridge via hole, prevents that the turn-round screw passes in the guide way that first screw hole got into the axial setting, and the shear screw passes second screw hole and gets into the cartridge via hole.
2. The integrated ball seat sliding sleeve structure as claimed in claim 1, wherein: the outer ring circumference of the inner sleeve body corresponding to the outer sides of the two axial ends of the guide groove in the length direction is respectively provided with a first sealing ring and a second sealing ring, the first sealing ring and the second sealing ring are arranged at two ends of the circumference formed by the rupture disc under the non-fractured state, and the outer ring surfaces of the first sealing ring and the second sealing ring are respectively tightly attached to the corresponding inner ring wall of the valve sleeve body.
3. An integrated ball seat sliding sleeve structure as claimed in claim 1, wherein: the radial movement structure is a stop screw, the radial inner end of the stop screw radially protrudes out of the inner wall of the limiting cavity, the radial outer end of the stop screw is attached to the corresponding inner annular wall of the outer sleeve, and two ends of the limiting cavity are connected to the large-diameter through cavities at two ends through conical transition holes respectively.
4. The integrated ball seat sliding sleeve structure as claimed in claim 1, wherein: the valve sleeve is characterized in that a clamping ring is fixedly sleeved on the outer ring of the limiting cavity, which is axially close to the outer sleeve, a radial inward convex shaft shoulder ring is arranged on the concave first ring groove, the surface of the shaft shoulder ring, which faces the valve sleeve body, is of a guide inclined surface structure, and the surface of the shaft shoulder ring, which faces the outer sleeve, is of a vertical surface.
5. The integrated ball seat sliding sleeve structure as claimed in claim 1, wherein: the opposite ends of the valve sleeve body and the outer sleeve are connected into a whole through a thread structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123012284.0U CN218522647U (en) | 2021-12-02 | 2021-12-02 | Integrated ball seat sliding sleeve structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123012284.0U CN218522647U (en) | 2021-12-02 | 2021-12-02 | Integrated ball seat sliding sleeve structure |
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| Publication Number | Publication Date |
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| CN218522647U true CN218522647U (en) | 2023-02-24 |
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| CN202123012284.0U Active CN218522647U (en) | 2021-12-02 | 2021-12-02 | Integrated ball seat sliding sleeve structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114016952A (en) * | 2021-12-02 | 2022-02-08 | 国仪石油技术(无锡)有限公司 | Integrated ball seat sliding sleeve structure |
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2021
- 2021-12-02 CN CN202123012284.0U patent/CN218522647U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114016952A (en) * | 2021-12-02 | 2022-02-08 | 国仪石油技术(无锡)有限公司 | Integrated ball seat sliding sleeve structure |
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