CN116771302A - Umbrella-shaped expansion type bridge plug with plugging structure - Google Patents
Umbrella-shaped expansion type bridge plug with plugging structure Download PDFInfo
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- CN116771302A CN116771302A CN202311034721.XA CN202311034721A CN116771302A CN 116771302 A CN116771302 A CN 116771302A CN 202311034721 A CN202311034721 A CN 202311034721A CN 116771302 A CN116771302 A CN 116771302A
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- slips
- expansion
- leaves
- umbrella
- bridge plug
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- 238000001125 extrusion Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 238000012856 packing Methods 0.000 description 8
- 238000007789 sealing Methods 0.000 description 7
- 239000004215 Carbon black (E152) Substances 0.000 description 5
- 229930195733 hydrocarbon Natural products 0.000 description 5
- 150000002430 hydrocarbons Chemical class 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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- Pressure Vessels And Lids Thereof (AREA)
Abstract
The invention discloses an umbrella-shaped expansion type plugging structure bridge plug, which belongs to the technical field of bridge plugs and comprises a mandrel, a pipe shaft, an upper slip assembly, a plugging mechanism and a lower slip assembly, wherein the plugging mechanism is arranged between the upper slip assembly and the lower slip assembly and comprises an upper sleeve ring, a plurality of upper expansion leaves, a plurality of lower expansion leaves, a plurality of rubber seals, a lower sleeve ring and a supporting body, the periphery of the bottom end of the upper sleeve ring is movably connected with the top ends of the upper expansion leaves, the periphery of the top end of the lower sleeve ring is movably connected with the bottom ends of the lower expansion leaves, the bottom ends of the upper expansion leaves which are arranged oppositely up and down are movably connected with the top ends of the lower expansion leaves, the rubber seals are arranged between the adjacent upper expansion leaves or lower expansion leaves, and the supporting body is arranged between the upper expansion leaves and the lower expansion leaves which are oppositely arranged up and down. The umbrella-shaped expansion type plugging structure bridge plug adopting the structure can form a double-layer plugging structure with less rubber material, so as to achieve the setting effect.
Description
Technical Field
The invention relates to the technical field of bridge plugs, in particular to an umbrella-shaped expansion type bridge plug with a plugging structure.
Background
In shale hydrocarbon exploitation, oil wells can pass through multiple hydrocarbon reservoir zones as hydrocarbon is distributed in different downhole zones. In the well completion process under the oil and gas well, perforation and fracturing operation are required to be carried out on the oil and gas layer areas one by one from the lowest layer of the oil and gas layer. Before perforation fracturing of each stage, plugging is required to be carried out on the hydrocarbon reservoir which is subjected to perforation fracturing of the previous stage, so that the flow and pressure of liquid required by fracturing of each layer are not divided and divided by the fractured hydrocarbon reservoir. The bridge plug provided by the prior art comprises: the central tube, the packing element and two slips, packing element and two slips cover are put in the central tube and the packing element is located between two slips. When in use, the slips are anchored with the casing, and the rubber cylinder is extruded to expand and seal the rubber cylinder, so that the bridge plug is fixed in the casing. And (5) putting a soluble sealing ball matched with the central pipe to seal the pipe orifice, thus completing the sealing. However, the technology uses more rubber materials, the length of the rubber cylinder is equal to that of the middle plugging structure, and a large amount of insoluble residues are left after the plugging operation is completed. Moreover, the simple rubber cylinder structure does not have an internal support, and the situation of insufficient sealing can occur.
Disclosure of Invention
The invention aims to provide an umbrella-shaped expansion type plugging structure bridge plug which can form a double-layer plugging structure by using fewer rubber materials so as to achieve a setting effect.
In order to achieve the above purpose, the invention provides an umbrella-shaped expansion type plugging structure bridge plug, which comprises a mandrel, a tubular shaft, an upper slip assembly, a plugging mechanism and a lower slip assembly, wherein the tubular shaft is sleeved outside the mandrel, the upper slip assembly, the plugging mechanism and the lower slip assembly are sleeved outside the tubular shaft, the upper slip assembly comprises an extrusion boss, an upper compression ring, an upper slip and an upper slip pressing table which are arranged from top to bottom, the lower slip assembly comprises a lower slip pressing table, a lower slip, a lower compression ring and a positioning push sleeve which are arranged from top to bottom, the plugging mechanism is arranged between the upper slip assembly and the lower slip assembly, the plugging mechanism comprises an upper sleeve ring, a plurality of upper expansion leaves, a plurality of lower expansion leaves, a plurality of rubber seals, a lower sleeve ring and a supporting body, the top end of the upper sleeve ring is fixedly connected with the upper slip pressing table, the periphery of the bottom end of the upper sleeve is movably connected with the top end of the lower slip pressing table, the periphery of the top end of the lower sleeve is movably connected with the bottom end of the lower expansion leaves, the bottom ends of the upper expansion leaves which are arranged opposite to each other, the upper expansion leaves and the top expansion leaves or the lower expansion leaves which are arranged between the adjacent upper expansion leaves or the lower expansion leaves, the upper expansion leaves and the lower expansion leaves are arranged between the upper rubber seals and the supporting body which are arranged opposite to each other.
Preferably, the extrusion boss, the upper pressing ring and the upper slips are sequentially and fixedly connected, the upper slip pressing table and the lower slip pressing table are conical, the conical surface of the upper slip pressing table faces upwards, the top end of the upper slip pressing table stretches into the space between the upper slips and the pipe shaft, the lower slips, the lower pressing ring and the positioning push sleeve are sequentially and fixedly connected, the bottom end of the pipe shaft is fixedly connected with the top end of the positioning push sleeve, the conical surface of the lower slip pressing table faces downwards, and the bottom end of the lower slip pressing table stretches into the space between the lower slip assembly and the pipe shaft.
Preferably, the sleeves are arranged around the bottom end of the upper sleeve ring, around the top end of the lower sleeve ring and at the bottom of the upper expansion blade, and the top end of the upper expansion blade, the top end of the lower expansion blade and the bottom end of the lower expansion blade are all provided with pin shafts which are inserted into the sleeves.
Preferably, the two side edges of the rubber packing are connected with the upper expansion blade or the lower expansion blade She Nianjie, the top ends of the upper expansion She Deduan and the lower expansion blade are also provided with rubber leakage-proof strips, and the included angle between the upper expansion blade and the lower expansion blade is an obtuse angle.
Preferably, the support is a metal rod or sheet.
Therefore, the umbrella-shaped expansion type plugging structure bridge plug adopts the structure, the plugging is carried out through the plugging mechanism arranged between the upper slip assembly and the lower slip assembly, the upper expansion blades and the lower expansion blades in the plugging mechanism are respectively opened under the pressing force exerted by the upper part and the lower part, and form a double-layer plugging surface together with rubber sealing, so that the setting function is carried out, and the plugging effect is achieved by using less rubber materials. Solves the technical problems of unstable plugging and residual particles remained after the bridge plug is dissolved in the prior art, and solves the cost and material consumption problems of the bridge plug.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
FIG. 1 is a schematic diagram of an embodiment of an umbrella-shaped expandable plugging structure bridge plug according to the present invention;
FIG. 2 is a top view of an upper expansion lobe and upper collar structure of an embodiment of the present invention.
Reference numerals
1. A mandrel; 2. a tube shaft; 3. extruding the boss; 4. a pressing ring is arranged; 5. an upper slip; 6. an upper slip pressing table; 7. an upper collar; 8. upper expansion leaves; 9. rubber packing; 10. a support body; 11. a lower expansion leaf; 12. a lower collar; 13. a lower slip pressing table; 14. a lower slip; 15. a lower pressing ring; 16. positioning the push sleeve; 17. a rubber leak-proof strip; 18. and a limiting ring plate.
Detailed Description
The technical scheme of the invention is further described below through the attached drawings and the embodiments.
Examples
As shown in fig. 1, the umbrella-shaped expansion type plugging structure bridge plug comprises a mandrel 1, a tube shaft 2, an upper slip assembly, a plugging mechanism and a lower slip assembly, wherein the tube shaft 2 is sleeved outside the mandrel 1, and the upper slip assembly, the plugging mechanism and the lower slip assembly are sleeved outside the tube shaft 2.
The upper slip assembly comprises an extrusion boss 3, an upper compression ring 4, an upper slip 5 and an upper slip pressing table 6 which are arranged from top to bottom, and the extrusion boss 3, the upper compression ring 4 and the upper slip 5 are fixedly connected in sequence. The lower slip assembly comprises a lower slip pressing table 13, a lower slip 14, a lower pressing ring 15 and a positioning pushing sleeve 16 which are arranged from top to bottom, wherein the lower slip 14 is fixedly connected with the lower pressing ring 15 and the positioning pushing sleeve 16 in sequence, and the bottom end of the pipe shaft 2 is fixedly connected with the top end of the positioning pushing sleeve 16. The upper slip pressing platform 6 and the lower slip pressing platform 13 are conical, the conical surface of the upper slip pressing platform 6 faces upwards, the top end of the upper slip pressing platform 6 stretches into the space between the upper slip 5 and the pipe shaft 2, the conical surface of the lower slip pressing platform 13 faces downwards, and the bottom end of the lower slip pressing platform 13 stretches into the space between the lower slip assembly and the pipe shaft 2. When the pressing boss 3 is pressed from above, the upper pressing ring 4 and the upper slips 5 press the upper slip pressing table 6 downward, thereby giving a downward force to the plugging mechanism.
The plugging mechanism is arranged between the upper slip assembly and the lower slip assembly and comprises an upper lantern ring 7, a plurality of upper expansion blades 8, a plurality of lower expansion blades 11, a plurality of rubber seals 9, a lower lantern ring 12 and a supporting body 10. The top of the upper lantern ring 7 is fixedly connected with the upper slip pressing table 6, the periphery of the bottom end of the upper lantern ring 7 is movably connected with the top ends of a plurality of upper expansion leaves 8, the bottom end of the lower lantern ring 12 is fixedly connected with the lower slip pressing table 13, the periphery of the top end of the lower lantern ring 12 is movably connected with the bottom ends of a plurality of lower expansion leaves 11, the bottom ends of the upper expansion leaves 8 which are arranged up and down oppositely are movably connected with the top ends of the lower expansion leaves 11, and an initial state included angle between the upper expansion leaves 8 and the lower expansion leaves 11 is an obtuse angle.
Sleeves are arranged around the bottom end of the upper lantern ring 7, around the top end of the lower lantern ring 12 and at the bottom of the upper expansion blade 8, pin shafts are arranged at the top end of the upper expansion blade 8, the top end and the bottom end of the lower expansion blade 11, and the pin shafts are inserted into the sleeves. The connection structure of the sleeve and the pin shaft enables the upper expansion blade 8 and the lower expansion blade 11 to have the freedom of rotation relative to the upper collar 7 and the lower collar 12. To avoid turning over due to excessive angles during rotation of the upper or lower expansion leaves 8, 11, a stop collar plate 18 may be provided around the bottom edge of the upper collar 7 and the top edge of the lower collar 12. The stop collar plate 18 may be slightly inclined in the direction of the expansion lobes.
Rubber seals 9 are arranged between the adjacent upper expansion leaves 8 or lower expansion leaves 11, two side edges of the rubber seals 9 are adhered to the upper expansion leaves 8 or the lower expansion leaves 11, and supporting bodies 10 are arranged between the upper expansion leaves 8 and the lower expansion leaves 11 which are arranged oppositely up and down. The support body 10 is a metal rod or sheet, and is required to be made of a degradable alloy with poor mechanical properties, and is crushed when being subjected to a certain degree of pressure.
When the sealing mechanism is in a non-setting state, the supporting body 10 is supported between the upper expansion blade 8 and the lower expansion blade 11, so that the sealing mechanism is kept in an initial state, a certain included angle is formed between the upper expansion blade 8 and the lower expansion blade 11, the rubber packing 9 is folded inwards, and the adjacent expansion blades are folded; when setting begins, the upper slip assembly and the lower slip assembly are pressed from the upper side and the lower side, the upper sleeve ring 7 descends along the pipe shaft 2 under pressure, the supporting body 10 is broken and crushed, the upper expansion blades 8 and the lower expansion blades 11 are close to each other and open to the periphery, and the rubber packing 9 is unfolded and fills the gap between the upper expansion blades 8 and the lower expansion blades 11, so that a two-layer sealing surface is formed, as shown in fig. 2. The bottom end of the upper expansion blade 8 and the top end of the lower expansion blade 11 are also provided with rubber leak-proof strips 17 for blocking gaps at the edge of the plugging surface.
Therefore, the umbrella-shaped expansion type plugging structure bridge plug adopting the structure is plugged through the plugging mechanism arranged between the upper slip assembly and the lower slip assembly, the upper expansion blades 8 and the lower expansion blades 11 in the plugging mechanism are respectively opened under the pressing force exerted up and down, and form a plugging surface together with the rubber packer 9, so that the setting function is implemented. Except the rubber packing 9 and the rubber leak-proof strip 17, the rest parts are made of degradable alloy materials, so that the plugging effect is achieved by using less rubber materials.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting it, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that: the technical scheme of the invention can be modified or replaced by the same, and the modified technical scheme cannot deviate from the spirit and scope of the technical scheme of the invention.
Claims (5)
1. An umbrella-shaped expansion type plugging structure bridge plug is characterized in that: including dabber, the tubular shaft, go up the slips subassembly, the shutoff mechanism, lower slips subassembly, the tubular shaft cover is located outside the dabber, go up slips subassembly, shutoff mechanism and lower slips subassembly cover are located outside the tubular shaft, go up slips subassembly including the extrusion boss that top-down set up, go up the clamping ring, go up slips pressing table, lower slips, lower clamping ring and location push away the cover, lower slips subassembly includes the lower slips pressing table that top-down set up, lower slips, the shutoff mechanism sets up between last slips subassembly and lower slips subassembly, the shutoff mechanism includes the lantern ring, a plurality of upper expansion leaves, a plurality of lower expansion leaves, a plurality of rubber seals, lower lantern ring, the supporter, the top and last slips pressing table fixed connection of lantern ring, the top swing joint with a plurality of upper expansion leaves around the bottom of lantern ring, the bottom swing joint with a plurality of lower expansion leaves around the top of lower lantern ring, be provided with the rubber seals between the upper expansion leaves that upper and lower relative sets up and the lower expansion leaves, be provided with the supporter between the upper expansion leaves that upper and lower relative expansion leaves.
2. An umbrella-type expanding plugging structure bridge plug as defined in claim 1, wherein: the extrusion boss, go up clamping ring and last slips fixed connection in proper order, go up the slips platform and lower slips platform is the cone, and the conical surface of going up slips platform is upwards, and the top of going up slips platform stretches into between slips and the tubular axle, and lower slips and lower clamping ring, location push away the cover fixed connection in proper order, the bottom of tubular axle and the top fixed connection of location push away the cover, the conical surface of slips platform down, and the bottom of slips platform stretches into between slips subassembly and the tubular axle down.
3. An umbrella-type expanding plugging structure bridge plug as defined in claim 1, wherein: the sleeves are arranged around the bottom end of the upper lantern ring, around the top end of the lower lantern ring and at the bottom of the upper expansion blade, and the pin shafts are arranged at the top end of the upper expansion blade, the top end of the lower expansion blade and the bottom end of the lower expansion blade and are spliced with the sleeves.
4. An umbrella-type expanding block structure bridge plug according to claim 3, wherein: the two side edges of the rubber seal and the upper expansion blade or the lower expansion blade She Nianjie, the top ends of the upper expansion She Deduan and the lower expansion blade are also provided with rubber leak-proof strips, and the included angle between the upper expansion blade and the lower expansion blade is an obtuse angle.
5. An umbrella-type expanding plugging structure bridge plug as defined in claim 1, wherein: the support body is a metal rod or a metal sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311034721.XA CN116771302B (en) | 2023-08-17 | 2023-08-17 | Umbrella-shaped expansion type bridge plug with plugging structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311034721.XA CN116771302B (en) | 2023-08-17 | 2023-08-17 | Umbrella-shaped expansion type bridge plug with plugging structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116771302A true CN116771302A (en) | 2023-09-19 |
| CN116771302B CN116771302B (en) | 2023-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311034721.XA Active CN116771302B (en) | 2023-08-17 | 2023-08-17 | Umbrella-shaped expansion type bridge plug with plugging structure |
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| Country | Link |
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| CN (1) | CN116771302B (en) |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2308138A (en) * | 1995-12-15 | 1997-06-18 | Tiw Corp | Through tubing bridge plug |
| JP2000324645A (en) * | 1999-05-06 | 2000-11-24 | Harness Syst Tech Res Ltd | Braided sheath inverting device of shield electric wire |
| CN202391379U (en) * | 2011-12-21 | 2012-08-22 | 吉林大学 | Umbrella-shaped thermosensitive packer for sublevel mining |
| CN103244074A (en) * | 2013-04-27 | 2013-08-14 | 河南理工大学 | Umbrella type hole packer |
| CN207064827U (en) * | 2017-08-15 | 2018-03-02 | 重庆平山矿山机电设备有限公司 | Gas tube fixer |
| US20180142529A1 (en) * | 2015-05-29 | 2018-05-24 | Halliburton Energy Services, Inc. | Packing element back-up system incorporating iris mechanism |
| CN109339732A (en) * | 2018-09-14 | 2019-02-15 | 宝鸡瑞林石油机电设备有限责任公司 | A kind of American football shape packing element sand control packer |
| CN211549644U (en) * | 2020-01-13 | 2020-09-22 | 中国煤炭地质总局水文地质局 | Gas drainage well drilling is with footpath sleeve pipe well cementation and is sealed stagnant water connecting device |
| US20210002973A1 (en) * | 2019-07-03 | 2021-01-07 | CNPC USA Corp. | Plug assembly |
| CN113266306A (en) * | 2021-06-25 | 2021-08-17 | 洲际海峡能源科技有限公司 | Automatic opening cement umbrella for well cementation and use method thereof |
| CN214464061U (en) * | 2021-03-30 | 2021-10-22 | 国能乌海能源黄白茨矿业有限责任公司 | Grouting hole packer |
| CN113550711A (en) * | 2021-09-22 | 2021-10-26 | 南通迪斯船舶科技有限公司 | Umbrella-shaped self-opening type ocean engineering pile pipe packer |
| CN115182702A (en) * | 2022-07-07 | 2022-10-14 | 太原科技大学 | Degradable bidirectional slip pressure abutment bridge plug |
| CN115949370A (en) * | 2023-03-10 | 2023-04-11 | 太原科技大学 | Light ring type dissolvable bridge plug |
| CN116146147A (en) * | 2023-04-17 | 2023-05-23 | 太原科技大学 | Bridge plug with bidirectional plugging structure |
-
2023
- 2023-08-17 CN CN202311034721.XA patent/CN116771302B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2308138A (en) * | 1995-12-15 | 1997-06-18 | Tiw Corp | Through tubing bridge plug |
| JP2000324645A (en) * | 1999-05-06 | 2000-11-24 | Harness Syst Tech Res Ltd | Braided sheath inverting device of shield electric wire |
| CN202391379U (en) * | 2011-12-21 | 2012-08-22 | 吉林大学 | Umbrella-shaped thermosensitive packer for sublevel mining |
| CN103244074A (en) * | 2013-04-27 | 2013-08-14 | 河南理工大学 | Umbrella type hole packer |
| US20180142529A1 (en) * | 2015-05-29 | 2018-05-24 | Halliburton Energy Services, Inc. | Packing element back-up system incorporating iris mechanism |
| CN207064827U (en) * | 2017-08-15 | 2018-03-02 | 重庆平山矿山机电设备有限公司 | Gas tube fixer |
| CN109339732A (en) * | 2018-09-14 | 2019-02-15 | 宝鸡瑞林石油机电设备有限责任公司 | A kind of American football shape packing element sand control packer |
| US20210002973A1 (en) * | 2019-07-03 | 2021-01-07 | CNPC USA Corp. | Plug assembly |
| CN211549644U (en) * | 2020-01-13 | 2020-09-22 | 中国煤炭地质总局水文地质局 | Gas drainage well drilling is with footpath sleeve pipe well cementation and is sealed stagnant water connecting device |
| CN214464061U (en) * | 2021-03-30 | 2021-10-22 | 国能乌海能源黄白茨矿业有限责任公司 | Grouting hole packer |
| CN113266306A (en) * | 2021-06-25 | 2021-08-17 | 洲际海峡能源科技有限公司 | Automatic opening cement umbrella for well cementation and use method thereof |
| CN113550711A (en) * | 2021-09-22 | 2021-10-26 | 南通迪斯船舶科技有限公司 | Umbrella-shaped self-opening type ocean engineering pile pipe packer |
| CN115182702A (en) * | 2022-07-07 | 2022-10-14 | 太原科技大学 | Degradable bidirectional slip pressure abutment bridge plug |
| CN115949370A (en) * | 2023-03-10 | 2023-04-11 | 太原科技大学 | Light ring type dissolvable bridge plug |
| CN116146147A (en) * | 2023-04-17 | 2023-05-23 | 太原科技大学 | Bridge plug with bidirectional plugging structure |
Non-Patent Citations (2)
| Title |
|---|
| 余铁静;张彪;杨玉山;苗玉礼;: "套损井保压式分注工艺开发及应用", 化学工程与装备, no. 09 * |
| 杨志鹏: "压缩式胶筒肩部突出变形试验研究", 《润滑与密封》, vol. 37, no. 2 * |
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| Publication number | Publication date |
|---|---|
| CN116771302B (en) | 2023-10-27 |
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