CN2091349U - Expansion glue tube - Google Patents
Expansion glue tube Download PDFInfo
- Publication number
- CN2091349U CN2091349U CN 91210466 CN91210466U CN2091349U CN 2091349 U CN2091349 U CN 2091349U CN 91210466 CN91210466 CN 91210466 CN 91210466 U CN91210466 U CN 91210466U CN 2091349 U CN2091349 U CN 2091349U
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- CN
- China
- Prior art keywords
- layer
- packing element
- winding
- glue tube
- steel
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Abstract
The utility model provides an expansion glue tube for sealing oil wells in oil field. The structure of the expansion glue tube is that the outer layer of the steel wire vane layer of an existing glue tube is provided with 2-4 winding layers of steel ropes, the winding directions of adjacent winding layers are opposite to each other, and a thin glue sheet layer is arranged between adjacent winding layers. The steel rope winding structure forms the compound skeleton structure of the glue tube with the steel wire vane layer, so that the wound steel ropes follow the change of bearing load to generate different network structures, which not only overcomes the defects of displacement and free movement produced by a steel wire vane framework under uneven bearing load, but also prevents the rupture of the glue tube due to local over expansion.
Description
The utility model relates to a kind of packing element, is a kind of field exploratory well carries out the layering packing under the bore hole state packing element that is used for.
The cage construction of expansion type packing element has following three kinds substantially both at home and abroad at present:
1, is arranged as the packing element of cage construction with the fan-shaped lapping of steel wire pigtail of bar shaped, can be divided into two kinds of structures of individual layer pigtail and double-deck pigtail.This kind expansion type packing element mainly reaches the expansion purpose by steel wire pigtail transversion malposition.Be applicable to the bore hole borehole wall of cased well and rule.But bore hole and the open hole well that big longitudinal crack and borehole wall local dent are arranged for deflection, cause promptly that the packing element differential expansion is excessive to make it that displacement exceeds lap width between the steel wire pigtail, and cause slit between the steel wire pigtail, in well, make the deliquescing of pure glue capsula interna again under the high temperature, thereby cause capsula interna under the state of pressure-bearing, from the slit, to extrude and be damaged.This kind packing element bearing capacity and heat resistance are all poor, thereby use also is restricted.
2, arrange the cage construction that a week constitutes with the fan-shaped lapping of bar-spring stainless steel band.This kind structure bearing capacity is higher than steel wire pigtail structure.But the borehole wall condition bad adaptability for the complexity of open hole well has same defective with steel wire pigtail packing element, and its maximum weakness is to hold high pressure distortion back to be difficult to recover, and trips out difficulty from the down-hole.
3,, adopt the packing element of the net structure of 13 ° of angle braidings as casing play with φ 4.2m/m wire rope.This kind packing element skeleton is thin, and pressure-bearing difference ability is low, and is prone to the slit between the wire rope when expanding, thereby cause capsula interna under the high temperature from the slit, to extrude and be damaged, the place's swelliong power that interweaves that adds netting is poor, and discontinuity influences the temperature tolerance and the bearing capacity of packing element.
The utility model is on the basis of existing packing element and overcomes the cage construction defective of existing packing element, and a kind of compound skeleton structure is provided, so that the expansion type packing element reaches strong and withstand voltage, the durable purpose of compliance.
The purpose of this utility model is achieved in that this expansion type packing element still utilizes joint design and capsula interna, liner capsule, outer glue-line and the steel wire pigtail structure of existing packing element.Its feature is: be provided with the winding layer of layer 2-4 wire rope at the skin of packing element steel braid layer, and the winding direction of adjacent winding layer is opposite, is provided with thin film layers between the adjacent winding layer.
Narrate embodiment according to accompanying drawing below.
Fig. 1 is the structural representation of expansion type packing element.
Fig. 2 is the step profile schematic diagram of expansion type packing element.
As shown in Figure 1: this expansion type packing element is the chief component of oil field packer.The two ends of packing element are present general union, and it comprises metallic steel bowl 1, lock ring 2, capsula interna pressure cap 3 and retaining ring 4.Between two unions is packing element, and this packing element is to be formed by MULTILAYER COMPOSITE, the innermost layer be pure capsula interna 5, the two ends of capsula interna 5 are clipped between lock ring 2 and the capsula interna pressure cap 3.Skin at capsula interna 5 is a liner capsule 6.With reference to Fig. 2, be steel braid layer 7 at liner capsule skin, steel braid layer 7 forms the fan-shaped lapping layer of 4-6 layer along liner capsule 6 cylindricals.Skin at steel braid layer 7 is provided with one deck mesoglea 8, and the skin of mesoglea 8 is wire rope winding layers 9 of the invention.Wire rope winding layer 9 is that its winding angle becomes 5 °-30 ° angle with the packing element axial line, through being entwined by the compact arranged wire rope of circumference and by above-mentioned angle one by one with the wire rope of 0.9-1.5 millimeter.This winding layer can be established two layers, three layers or four layers, but the winding direction of adjacent winding layer is opposite.For prevent to expand at packing element, changing of the relative positions position between the wire rope when shrinking, between adjacent winding layer, be provided with thin film layers 10.Like this, just formed the composite bed skeleton that constitutes jointly by wire rope winding layer and steel braid layer, again these composite bed skeleton two ends have been locked in the steel bowl and lock ring of union, and glue-line 11 has just formed complete packing element outside in winding layer outer bonding.But confirm that in test the winding layer of this packing element is two-layer or winding angle is for best between 9 °-17 °.
Wire rope winding structure of the present utility model is owing to formed the compound skeleton structure of expansion type packing element with steel braid layer, the wire rope that makes winding produces different net structures with the variation of pressure-bearing, this has not only overcome the displacement and the defective of freely going here and there that steel wire pigtail skeleton is produced when pressurized is uneven, but also limited packing element because of part excessive expansion cause breaking possible.Therefore, it has not only improved the bearing capacity and the adaptive capacity of packing element, the application life of also improving packing element.It also has the advantage that nerve is good and make packing element be easy to take out from well simultaneously.
Claims (3)
1, a kind of expansion type packing element, it comprises steel bowl, lock ring, capsula interna pressure cap and the retaining ring of union part, capsula interna, liner capsule, steel braid layer and outer glue-line with the packing element part, it is characterized in that: the winding layer that is provided with the layer 2-4 wire rope at the skin of packing element steel braid layer, and the winding direction of adjacent winding layer is opposite, is provided with thin film layers between the adjacent winding layer.
2, expansion type packing element according to claim 1 is characterized in that: the angle that twines of wire rope winding layer becomes 5 °-30 ° with the packing element axial line.
3, expansion type packing element according to claim 1 and 2 is characterized in that: the winding layer of this packing element is two-layer or winding angle is 9 °-17 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91210466 CN2091349U (en) | 1991-04-19 | 1991-04-19 | Expansion glue tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91210466 CN2091349U (en) | 1991-04-19 | 1991-04-19 | Expansion glue tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2091349U true CN2091349U (en) | 1991-12-25 |
Family
ID=4919261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91210466 Withdrawn CN2091349U (en) | 1991-04-19 | 1991-04-19 | Expansion glue tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2091349U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220034187A1 (en) * | 2020-07-30 | 2022-02-03 | Saudi Arabian Oil Company | Methods for deployment of expandable packers through slim production tubing |
| CN114482909A (en) * | 2022-01-07 | 2022-05-13 | 中铁第一勘察设计院集团有限公司 | Ground stress test packer |
-
1991
- 1991-04-19 CN CN 91210466 patent/CN2091349U/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220034187A1 (en) * | 2020-07-30 | 2022-02-03 | Saudi Arabian Oil Company | Methods for deployment of expandable packers through slim production tubing |
| US11591880B2 (en) * | 2020-07-30 | 2023-02-28 | Saudi Arabian Oil Company | Methods for deployment of expandable packers through slim production tubing |
| CN114482909A (en) * | 2022-01-07 | 2022-05-13 | 中铁第一勘察设计院集团有限公司 | Ground stress test packer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |