CN201095969Y - Fracturing packer - Google Patents
Fracturing packer Download PDFInfo
- Publication number
- CN201095969Y CN201095969Y CNU2007200139753U CN200720013975U CN201095969Y CN 201095969 Y CN201095969 Y CN 201095969Y CN U2007200139753 U CNU2007200139753 U CN U2007200139753U CN 200720013975 U CN200720013975 U CN 200720013975U CN 201095969 Y CN201095969 Y CN 201095969Y
- Authority
- CN
- China
- Prior art keywords
- packing element
- packer
- compression
- glue tube
- gland
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model belongs to a petroleum downhole tool, in particular to a pressure crack packer that consists of an upper contact (1), a lower contact (8) and a central pipe (2); wherein, an upper limited circular bead (9) and a lower limited circular bead (10) are arranged in the middle of the central pipe (2), and the periphery of the central pipe (2) is provided with an upper pressing sleeve (4) and a lower pressing sleeve (6); an expanding type glue tube (5) is arranged in the middle of the central pipe, an upper group compression glue tube (3) is positioned between the upper contact (1) and the upper pressing sleeve (4), and a lower group compression glue tube (2) is arranged between the lower pressing sleeve (6) and the lower contact (8); firstly, the pressure crack packer adopts two glue tubes which are expanding type and compression type for sealing, so as to be high in working pressure and reliable in pressure crack; secondly, the packer is internally provided with the limited circular bead to limit the swollen sealing travel route of the compression glue tube, so as to avoid the whole of the compression glue tube sliding to the outer side of the tool to result in tool failures when the compression glue tube is compressed.
Description
Technical field
The utility model belongs to the oil downhole tool, particularly a kind of pressure break packer.
Background technology
At present, the pressure break packer that use the home and abroad, a kind of is inflatable packer, adopts the sealing of expanding packing element, after this packer pressure break is finished, the automatic deblocking of packer when playing pipe, need not to carry out unsealing operation, but the expanding packing element is when fracturing work, two kinds of power effects of axial shearing that living radial drawing and the frac pressure of cutting down output in being subjected to produces, operating pressure is low, and the formation breakdown that fracture pressure is high can cause the pressure break failure.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned technical deficiency, and a kind of operating pressure height is provided, the reliable pressure break packer of pressure break.
The technical scheme that the utility model technical solution problem adopts is: the pressure break packer is made up of top connection, lower contact, central tube, be characterized in being provided with upper limit shoulder and lower limit shoulder in the centre of central tube, outside central tube, place gland, following gland are housed, the expanding packing element is equipped with in the centre, group compression packing element is housed between top connection and the last gland, group compression packing element is housed down between following gland and the lower contact.
The beneficial effects of the utility model are: one, pressure break packer adopt expanding and two kinds of packing element sealings of compression, the operating pressure height, and pressure break is reliable; Base two, there is spacing shoulder packer inside, and limit compression formula packing element expands and seals stroke, and integral body slides into the instrument outside and causes tool failures when avoiding the compression packing element infinitely to compress.
Description of drawings
Specify with embodiment below in conjunction with accompanying drawing.
Fig. 1 shows pressure break packer construction figure.
Among the figure, the 1-top connection; The 2-central tube; Last group of compression packing element of 3-; The last gland of 4-; 5-expanding packing element; Gland under the 6-; 7-is group compression packing element down; The 8-lower contact; 9-upper limit shoulder; 10-lower limit shoulder;
The specific embodiment
Embodiment, with reference to accompanying drawing 1, the top connection 1 that is threaded of central tube 2 upper ends, the lower end lower contact 8 that is threaded, the outside between top connection 1 and the lower contact 8 articulate successively group compression packing element 3, on gland 4, down gland 6, organize compression packing element 7 down, central tube 2 is provided with upper limit shoulder 9 and lower limit shoulder 10 in the outside of last gland 4 lower ends and following gland 6 upper end positions, in the groove between upper limit shoulder 9 and lower limit shoulder 10 outsides, upper limit cover 4 and lower limit cover 6 expanding packing element 5 is housed.
When pressure break lower floor, pressurization in the oil pipe, expanding packing element 5 expands and seals, last gland 4, expanding packing element 5, gland 6 is up down, group compression packing element 3 envelope that expands promotions in, and following gland 6 is gone up the group compression packing element 3 bloated strokes that seal with lower limit shoulder 10 restrictions on the central tube 2, after lower floor's pressure break is finished, put pressure in the oil pipe, expanding packing element 5, on organize compression packing element 3 and reclaim the instrument deblocking.When the pressure break upper strata, pressurization in the oil pipe, expanding packing element 5 expands and seals, last gland 4, expanding packing element 5, gland 6 is descending down, promotes down group compression packing element 7 envelope that expands, and upper limit shoulder 9 restrictions on last gland 6 and the central tube 2 group compression packing element 7 are down expanded and sealed strokes, after the upper strata pressure break is finished, put pressure in the oil pipe, expanding packing element 5, organize compression packing element 7 down and reclaim the instrument deblocking.
Claims (1)
1, a kind of pressure break packer, form by top connection (1), lower contact (8), central tube (2), it is characterized in that being provided with upper limit shoulder (9) and lower limit shoulder (10) in the centre of central tube (2), outside central tube (2), place gland (4), following gland (6) are housed, expanding packing element (5) is equipped with in the centre, group compression packing element (3) is housed between top connection (1) and the last gland (4), group compression packing element (2) is housed down between following gland (6) and the lower contact (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200139753U CN201095969Y (en) | 2007-08-24 | 2007-08-24 | Fracturing packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200139753U CN201095969Y (en) | 2007-08-24 | 2007-08-24 | Fracturing packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201095969Y true CN201095969Y (en) | 2008-08-06 |
Family
ID=39923020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200139753U Expired - Lifetime CN201095969Y (en) | 2007-08-24 | 2007-08-24 | Fracturing packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201095969Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102650202A (en) * | 2012-05-04 | 2012-08-29 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Expansion compression type packer |
| CN103256019A (en) * | 2013-05-08 | 2013-08-21 | 阜新驰宇石油机械有限公司 | Horizontal well dragging crushing high-pressure packer |
-
2007
- 2007-08-24 CN CNU2007200139753U patent/CN201095969Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102650202A (en) * | 2012-05-04 | 2012-08-29 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Expansion compression type packer |
| CN102650202B (en) * | 2012-05-04 | 2015-04-08 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Expansion compression type packer |
| CN103256019A (en) * | 2013-05-08 | 2013-08-21 | 阜新驰宇石油机械有限公司 | Horizontal well dragging crushing high-pressure packer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Fuxin City Petroleum Tool Factory Assignor: Fuxin Chiyu Petroleum Machinery Co., Ltd. Contract record no.: 2010210000155 Denomination of utility model: Fracturing packer for barefoot well Granted publication date: 20080806 License type: Exclusive License Record date: 20100929 |
|
| CX01 | Expiry of patent term |
Granted publication date: 20080806 |
|
| CX01 | Expiry of patent term |