CN213743345U - Bridge plug assembly capable of synchronously feeding balls - Google Patents
Bridge plug assembly capable of synchronously feeding balls Download PDFInfo
- Publication number
- CN213743345U CN213743345U CN202022514625.3U CN202022514625U CN213743345U CN 213743345 U CN213743345 U CN 213743345U CN 202022514625 U CN202022514625 U CN 202022514625U CN 213743345 U CN213743345 U CN 213743345U
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- bridge plug
- adapter
- ball
- elastic claw
- mandrel
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- 210000000078 claw Anatomy 0.000 claims abstract description 77
- 239000012530 fluid Substances 0.000 claims description 23
- 239000011148 porous material Substances 0.000 claims description 9
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 230000008602 contraction Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 11
- 238000010008 shearing Methods 0.000 description 8
- 238000005553 drilling Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Abstract
The utility model relates to a technical field of oil gas well downhole tool especially relates to a bridging plug subassembly that can send ball in step. The bridge plug adapter comprises a bridge plug adapter and a bridge plug; one end of the bridge plug adapter is provided with an elastic claw; the middle part of the elastic claw is provided with a cavity which can contain a ball for bridge plug setting, and the periphery of the cavity is provided with a split claw which can elastically contract towards the radial direction of the elastic claw; the bridge plug comprises a bridge plug mandrel, and the size of an inlet of the bridge plug mandrel is matched with the inner diameter of the elastic claw; during assembly, the elastic claw with the ball arranged in the cavity is arranged in the bridge plug mandrel, and the split claw is extruded by the bridge plug mandrel to radially contract, so that the limit of the ball in the cavity to the direction of the bridge plug mandrel is realized. The utility model discloses a set up the elastic claw on the bridging plug adapter, the elastic claw can carry on spacingly to the ball after the assembly, makes the ball can not contact the ball seat face of bridging plug dabber, send the ball in step when realizing that the bridging plug goes into the well, realizes simple operation, reduces construction steps and time cost to appear the risk of cuting in advance when can effectively reducing the pump sending bridging plug goes into the well.
Description
Technical Field
The utility model relates to a technical field of oil gas well downhole tool especially relates to a bridging plug subassembly that can send ball in step.
Background
With the continuous deepening of oil exploration and development, the staged fracturing technology is widely introduced because of the advantages of one-time pipe column operation, no staged limitation, simple tool pipe column structure, smooth shaft and the like, and the application of the bridge plug is increasingly wide as one of important tools for staged fracturing.
At present, in the market, the bridge plug is sent to the setting mode in the pit and is divided into two kinds: the portable ball type bridge plug adapter comprises a non-portable ball type bridge plug adapter and a portable ball type bridge plug adapter. Although the risk of early shearing of the bridge plug can be eliminated by the aid of the non-portable ball type bridge plug adapter, fracturing construction cannot be carried out immediately after the bridge plug is set, and accordingly construction time is long. The current ball-carrying well descending technology can save the construction link of pumping balls, but in the well descending process, the risk of releasing a bridge plug in advance exists, and in the well descending process, if the bridge plug is clamped or an adapter is broken, a steel wire and a cable need to be lifted or a continuous oil pipe needs to be used for grinding and milling the bridge plug, so that the rising of the exploitation cost is finally caused, the steel wire and the cable are broken when lifted, even the whole pipe string can be damaged, the well completion time is greatly prolonged, and the extra drilling and exploitation cost is increased.
Disclosure of Invention
The utility model discloses a solve present bridging plug and do not take the ball then to bore to adopt for a long time in the pit, and take the ball then appear shearing in advance easily, bridging plug blocks with the sleeve pipe or the adapter fracture, leads to exploiting with high costs, the long technical problem of time, provides a bridging plug subassembly that can send the ball in step.
In order to solve the technical problem, the technical scheme of the utility model as follows:
a bridge plug assembly capable of synchronously sending balls comprises a bridge plug adapter and a bridge plug; one end of the bridge plug adapter connected with the bridge plug is provided with an elastic claw; the middle part of the elastic claw is provided with a cavity capable of accommodating a ball for bridge plug setting, and the periphery of the cavity is provided with a split claw capable of elastically contracting towards the radial direction of the elastic claw; the bridge plug comprises a bridge plug mandrel, and the size of an inlet of the bridge plug mandrel is matched with the inner diameter of the elastic claw; during assembly, the elastic claw with the ball arranged in the cavity is arranged in the bridge plug mandrel, the split claw is extruded by the bridge plug mandrel to radially contract, the limiting of the ball in the cavity towards the bridge plug mandrel is realized, and the limiting release of the ball is realized after the bridge plug adapter and the bridge plug are sheared and separated.
Furthermore, the bridge plug adapter is provided with a flow passage which is arranged between the inner diameter of the bridge plug mandrel and the upper end of the bridge plug adapter in a penetrating manner, so that the communication of the upper well fluid and the lower well fluid of the bridge plug assembly is realized.
Further, the bridge plug adapter comprises an adapter body, and the elastic claw is arranged at the lower end of the adapter body; the adapter is characterized in that a connecting rod is arranged at the upper end of the adapter body, and connecting threads are arranged on the connecting rod.
Furthermore, one end of the split claw of the elastic claw is fixedly connected with the adapter main body, the other end of the split claw is provided with a convex block inclined at a certain angle, the elastic claw is smoothly assembled into the bridge plug mandrel through the convex block, and radial contraction of the split claw is realized.
Furthermore, the split claws are provided with a plurality of split claws, and an overflowing gap is arranged between every two adjacent split claws.
Further, an inner cavity communicated with the middle cavity of the elastic claw is arranged in the adapter main body; and overflowing pore passages are obliquely arranged on the outer sides of the inner cavity and the adapter main body.
Furthermore, the overflowing pore channels are arranged in a plurality, and all the overflowing pore channels are uniformly arranged on the circumference of the adapter main body.
Furthermore, an overflowing hole is formed in the inlet of the bridge plug mandrel.
Furthermore, the bridge plug adapter and the bridge plug are correspondingly provided with shearing hand losing holes at the connecting part, and when the bridge plug adapter and the bridge plug are assembled, the shearing hand losing holes are arranged by shearing hands, so that the bridge plug adapter and the bridge plug can be separately connected.
Further, the shear release is a shear screw.
The utility model discloses a set up the elastic claw on the bridging plug adapter, the elastic claw can carry on spacingly to the ball after the assembly, makes the ball can not contact the ball seat face of bridging plug dabber, send the ball in step when realizing that the bridging plug goes into the well, realizes simple operation, reduces construction steps and time cost to appear the risk of cuting in advance when can effectively reducing the pump sending bridging plug goes into the well. Meanwhile, the bridge plug assembly is provided with the overflowing pore channel and the overflowing gap on the bridge plug adapter, so that well fluid can circulate on the well and under the well while the downhole resistance is reduced, the accumulation of sundries in the sleeve is reduced, and the acidic well fluid or high-chlorine well fluid can be dissolved through circulation when the bridge plug assembly is clamped, so that the problem of accidental clamping or accidental setting of the bridge plug is solved, and the drilling and production cost of a single well is effectively controlled.
Drawings
Fig. 1 is an assembly cross-sectional view of a bridge plug assembly capable of synchronously feeding balls according to an embodiment of the present invention.
Fig. 2 is a shear sectional view of a bridge plug assembly capable of synchronously feeding balls according to an embodiment of the present invention.
Fig. 3 is a partial cross-sectional structural view of a bridge plug adapter according to an embodiment of the present invention.
Wherein:
the bridge plug adapter is 10, the elastic claw is 11, the overflowing pore passage is 12, the adapter main body is 13, and the connecting rod is 14;
the bridge plug is 20, and the bridge plug mandrel is 21;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Examples
The embodiment provides a bridge plug assembly capable of synchronously sending balls, which is mainly applied to underground oil and gas wells and realizes setting underground to finally complete the staged fracturing of the oil and gas wells. Specifically, referring to fig. 1-3, the bridge plug assembly of the present embodiment generally includes a bridge plug adapter 10 and a bridge plug 20, wherein the bridge plug 20 is used for packing of a hydrocarbon well, and the bridge plug adapter 10 is used to assist in completing setting of the bridge plug 20 in the hydrocarbon well. In terms of structure, the end of the bridge plug adapter 10 connected with the bridge plug 20 is provided with an elastic claw 11, and the elastic claw 11 is used for ensuring that the bridge plug assembly realizes the separation between the ball 30 and the ball seat surface of the bridge plug 20 in the process of carrying the ball and descending the well, and sending the ball 30 into the ball seat surface when setting.
Specifically, referring to fig. 1-3, in terms of the elastic claw 11, a cavity capable of accommodating a ball 30 for setting the bridge plug 20 is disposed in the middle of the elastic claw 11, and split claws capable of elastically contracting in the radial direction of the elastic claw 11 are disposed at the periphery of the cavity, and the ball 30 can be placed in the cavity of the elastic claw 11, and the limit in the elastic claw 11 is completed by the radial contraction of the split claws. More specifically, elasticity claw 11 and bridge plug 20 are for mutually supporting, and bridge plug 20 is including bridge plug dabber 21, bridge plug dabber 21's entry size and the 11 internal diameter looks adaptations of elasticity claw, when the assembly, bridge plug dabber 21 is put into to the cavity built-in elasticity claw 11 that has ball 30, in the assembling process, split claw inwards compresses and puts into bridge plug dabber 21 entry, after the assembly, ball 30 receives split claw spacing, can't drop to the ball seat face in bridge plug dabber 21 in the cavity. In the setting process, after the bridge plug adapter 10 and the bridge plug 20 are cut and separated, the split claw leaves the inlet of the bridge plug mandrel 21, elastically expands to the original size, releases the limit on the ball 30, and the ball 30 falls to the ball seat surface in the bridge plug mandrel 21 under the influence of gravity, so that the sealing of the ball seat surface of the bridge plug 20 is realized.
In some embodiments, referring to fig. 1-3, the bridge plug adapter 10 is provided with a flow passage 12, and the flow passage 12 is disposed between the inner diameter of the bridge plug mandrel 21 and the upper end of the bridge plug adapter 10, although in some embodiments, an overflow hole is also disposed at the inlet of the bridge plug mandrel 21. The purpose of the overflowing hole channel 12 and the overflowing hole is to realize that when the bridge plug 20 is put into a casing and set, well fluid can circularly flow between an inner hole of the bridge plug 20 and the annular space of the casing, so that the downhole resistance of a bridge plug assembly is reduced, the strength of the shearing release 40 is favorably maintained, and the precise regulation and control of the shearing setting force during setting are ensured.
Meanwhile, the overflowing hole 12 has another function that when the bridge plug 20 is accidentally stuck in the process of going down the well, the overflowing gap between the overflowing hole 12 of the bridge plug adapter 10 and the split claw can realize the conduction with the inner hole of the bridge plug mandrel 21, and then the soluble bridge plug 20 is dissolved in a mode of circulating acid well fluid or high-chlorine well fluid, so that the effect of releasing the jam is finally achieved, and during the operation, the steel wire and the cable do not need to be forcibly lifted, so that the string of the pipe cannot be damaged. On the other hand, when the bridge plug 20 is set in a non-target well section due to accidental breakage of the adapter in the underground setting process, the soluble bridge plug 20 can be dissolved by circulating the acid well fluid or the high-chlorine root well fluid without drilling a drill bit to remove the soluble bridge plug 20, so that the well completion time can be effectively shortened, and the drilling and production cost can be controlled.
The advantage of this embodiment lies in, the bridge plug subassembly of this embodiment can carry out spacingly to ball 30 through setting up elastic claw 11 on bridge plug adapter 10 after elastic claw 11 assembles, makes ball 30 can not contact the ball seat face of bridge plug dabber 21, realizes sending the ball in step when the bridge plug 20 is gone into the well, realizes simple operation, reduces construction steps and time cost to the risk of shearing appears in advance when can effectively reducing pump sending bridge plug 20 is gone into the well. Meanwhile, the bridge plug assembly is provided with the overflowing pore passage 12 and the overflowing gap on the bridge plug adapter 10, so that well fluid can circulate on the well and under the well while the downhole resistance is reduced, the accumulation of impurities in a sleeve is reduced, and the well fluid can be dissolved by circulating acid well fluid or high-chlorine radical well fluid when the bridge plug assembly is clamped, so that the problem of accidental clamping or accidental setting of the bridge plug 20 is solved, and the drilling and production cost of a single well is effectively controlled.
In terms of the specific construction of the bridge plug adapter 10, in some embodiments, referring to fig. 3, the bridge plug adapter 10 includes an adapter body 13 with resilient fingers 11 disposed at a lower end of the adapter body 13; the connecting rod 14 is arranged at the upper end of the adapter main body 13, connecting threads are arranged on the connecting rod 14, the bridge plug adapter 10 can be connected with a setting tool through the connecting rod 14, and meanwhile, the connecting rod 14 is further provided with a locking torsion spring, so that the reliability of connection of the adapter can be guaranteed.
Preferably, referring to fig. 3, one end of the split claw of the elastic claw 11 is fixedly connected to the adaptor body 13, and the other end of the split claw is provided with a projection inclined at a certain angle, through which the elastic claw 11 is smoothly assembled into the bridge plug core shaft 21, and radial contraction of the split claw is realized, and more specifically, the split claw is uniformly distributed on the elastic claw 11 at 360 degrees. Preferably, the plurality of split claws are arranged, the overflowing gap is arranged between every two adjacent split claws, and in the aspect of circulation of well fluid, the well fluid at the lower end of the bridge plug 20 can be circularly communicated with the well fluid at the upper end of the bridge plug 20 through the bridge plug mandrel 21, the overflowing gap and the overflowing pore passage 12.
In terms of the specific arrangement of the flow passage 12, preferably, referring to fig. 1-3, an inner cavity communicated with the middle cavity of the elastic claw 11 is arranged in the adapter main body 13; the inner cavity and the outer side of the adapter body 13 are obliquely provided with a flow passage 12, and the flow passage 12 is used for realizing the conduction between the inner cavity and the upper end of the adapter body 13. More preferably, the plurality of the flow passage holes 12 are provided, and each flow passage hole 12 is uniformly arranged on the circumference of the adapter body 13.
In connection with the connection between the bridge plug adapter 10 and the bridge plug 20, in some embodiments, referring to fig. 1, the bridge plug adapter 10 and the bridge plug 20 are respectively provided with a shear drop hole at the connection position, and when the bridge plug adapter 10 and the bridge plug 20 are assembled, the shear drop hole is inserted by the shear drop 40, so that the bridge plug adapter 10 and the bridge plug 20 can be detachably connected. Preferably, in this embodiment, the shear release 40 is a shear screw.
For better operation experience, a specific structure and an assembly process of the bridge plug assembly of the present embodiment are provided, wherein, referring to fig. 1 to 3, during assembly, the ball 30 is placed into the cavity of the elastic claw 11, the bridge plug adapter 10 and the bridge plug 20 are butt-jointed and fastened, after the bridge plug adapter 10 and the bridge plug 20 are assembled, the elastic claw 11 and the bridge plug mandrel 21 are matched, so as to be compressed inward to form a conical inner cavity, and therefore the ball 30 is confined in the inner cavity of the bridge plug adapter 10 and cannot contact with the ball 30 seat sealing surface of the bridge plug mandrel 21, thereby achieving the function of synchronous ball feeding.
In the setting process of the bridge plug 20, the pushing cylinder can compress parts of the bridge plug 20 except for the bridge plug mandrel 21, so that a sealing element of the bridge plug 20 seals the sleeve, the shear screw is sheared off when reaching a rated setting force, the bridge plug adapter 10 is separated from the bridge plug 20 at the moment, the elastic claw 11 is separated from the bridge plug mandrel 21, the split claw is restored to a free state, at the moment, the ball 30 falls out of an inner cavity of the bridge plug adapter 10, the ground control chamber continues to pump well fluid, the ball 30 can be sent to a ball 30 seat sealing surface of the bridge plug mandrel 21 to play a role in sealing, and at the moment, the bridge plug 20 can bear pressure.
In the aspect of well fluid circulation, when the bridge plug adapter 10 is assembled with the bridge plug 20 and pumped into a well, well fluid can circulate through the overflowing pore canal 12, the overflowing hole of the bridge plug 20, the overflowing gap of the split claw and the inner hole of the bridge plug mandrel 21, so that the well entering resistance of the bridge plug 20 is effectively reduced, the accumulation of impurities at the lower end of the bridge plug 20 and the through groove of the pushing cylinder is reduced, and the soluble bridge plug 20 can be dissolved or unblocked in a way of providing a channel for circulating acidic well fluid or high-chlorine radical well fluid under the condition that the bridge plug 20 is accidentally blocked in a well descending process or the bridge plug 20 is accidentally broken due to the adapter in a well setting process.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A bridge plug assembly capable of synchronously sending balls is characterized by comprising a bridge plug adapter and a bridge plug; one end of the bridge plug adapter connected with the bridge plug is provided with an elastic claw; the middle part of the elastic claw is provided with a cavity capable of accommodating a ball for bridge plug setting, and the periphery of the cavity is provided with a split claw capable of elastically contracting towards the radial direction of the elastic claw; the bridge plug comprises a bridge plug mandrel, and the size of an inlet of the bridge plug mandrel is matched with the inner diameter of the elastic claw; during assembly, the elastic claw with the ball arranged in the cavity is arranged in the bridge plug mandrel, the split claw is extruded by the bridge plug mandrel to radially contract, the limiting of the ball in the cavity towards the bridge plug mandrel is realized, and the limiting release of the ball is realized after the bridge plug adapter and the bridge plug are sheared and separated.
2. The bridge plug assembly capable of synchronously sending balls according to claim 1, wherein a flow passage is arranged on the bridge plug adapter and is arranged between the inner diameter of a bridge plug mandrel and the upper end of the bridge plug adapter in a penetrating manner, so that the communication of well fluid up and down the bridge plug assembly is realized.
3. A synchronized ball feed bridge plug assembly as claimed in claim 1 or 2, wherein said bridge plug adaptor includes an adaptor body, said resilient fingers being disposed at a lower end of said adaptor body; the adapter is characterized in that a connecting rod is arranged at the upper end of the adapter body, and connecting threads are arranged on the connecting rod.
4. The bridge plug assembly capable of synchronously feeding balls according to claim 3, wherein one end of the split claw of the elastic claw is fixedly connected with the adapter main body, the other end of the split claw is provided with a projection inclined at a certain angle, and the elastic claw is smoothly assembled into the bridge plug mandrel through the projection and realizes radial contraction of the split claw.
5. The bridge plug assembly capable of synchronously sending balls according to claim 3, wherein the split claws are provided in plurality, and an overflowing gap is arranged between every two adjacent split claws.
6. The bridge plug assembly capable of synchronously sending balls according to claim 3, wherein an inner cavity communicated with the middle cavity of the elastic claw is formed in the adapter body; and overflowing pore passages are obliquely arranged on the outer sides of the inner cavity and the adapter main body.
7. A bridge plug assembly with synchronous ball feeding function as claimed in claim 6, wherein the through-flow hole is provided in plurality, and each through-flow hole is uniformly arranged on the circumference of the adapter main body.
8. A synchronized ball feed bridge plug assembly as claimed in claim 1 or claim 2, wherein the inlet of the bridge plug mandrel is also provided with an overflow aperture.
9. The bridge plug assembly capable of synchronously sending balls according to claim 1 or 2, wherein the bridge plug adapter and the bridge plug are respectively provided with a shear drop hole at the joint, and when the bridge plug adapter and the bridge plug are assembled, the shear drop hole is placed in the bridge plug adapter and the bridge plug through a shear drop, so that the bridge plug adapter and the bridge plug can be detachably connected.
10. A synchronized ball feed bridge plug assembly as set forth in claim 9, wherein said shear release is a shear screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022514625.3U CN213743345U (en) | 2020-11-03 | 2020-11-03 | Bridge plug assembly capable of synchronously feeding balls |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022514625.3U CN213743345U (en) | 2020-11-03 | 2020-11-03 | Bridge plug assembly capable of synchronously feeding balls |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213743345U true CN213743345U (en) | 2021-07-20 |
Family
ID=76819294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022514625.3U Active CN213743345U (en) | 2020-11-03 | 2020-11-03 | Bridge plug assembly capable of synchronously feeding balls |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213743345U (en) |
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2020
- 2020-11-03 CN CN202022514625.3U patent/CN213743345U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 516000 No.1 Factory building, No.10 Yuanhui Road, Chenjiang street, Zhongkai high tech Zone, Huizhou City, Guangdong Province Patentee after: Baiqin Energy Technology (Guangdong) Co.,Ltd. Country or region after: China Address before: 516000 No.1 Factory building, No.10 Yuanhui Road, Chenjiang street, Zhongkai high tech Zone, Huizhou City, Guangdong Province Patentee before: BAIQIN ENERGY TECHNOLOGY (HUIZHOU) CO.,LTD. Country or region before: China |