CN204252932U - Double acting inflatable packer - Google Patents
Double acting inflatable packer Download PDFInfo
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- CN204252932U CN204252932U CN201420728103.5U CN201420728103U CN204252932U CN 204252932 U CN204252932 U CN 204252932U CN 201420728103 U CN201420728103 U CN 201420728103U CN 204252932 U CN204252932 U CN 204252932U
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- packing element
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- lower contact
- central tube
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Abstract
Double acting inflatable packer, relates to the underground fracture acid stimulation field of operation of petroleum gas.Comprise top connection, lower contact, the packing element seat of honour, seat under packing element, central tube and packing element, the lower thread of top connection is connected to the upper end of central tube, the top of lower contact is threaded in the lower end of central tube, the described packing element seat of honour, packing element, under packing element, seat is sulfided into outside the central tube that sleeve integrating is contained between top connection and lower contact, the top at the packing element seat of honour is threaded with top connection, under described packing element, seat lower slide is sealedly connected on the top of lower contact, the top loop week of lower contact is evenly equipped with shaft orientation liquid feeding hole, lower contact inwall is provided with the radial inlet opening of connection shaft to inlet opening.Under packing element of the present utility model, seat changed rigid connection structure that is original and lower contact, and to adopt under packing element seat can centrally pipe axis slide construction, thus made packing element can centrally pipe axial stretching, packing element reasonable stress.
Description
Technical field
The utility model relates to the underground fracture acid stimulation field of operation of petroleum gas, is specially a kind of double acting inflatable packer.
Background technology
Hydraulic expanding packer with throttling sandblaster with the use of, during fracture acidizing, the oil pressure in oil pipe is relied on to make liquid enter packing element inner chamber in the oil pressure throttling that sandblaster produces, envelope that packing element is swollen, reach fracture acidizing or separate stratum fracfturing acidifying object, stop construction, earth pressure release, packing element is regained voluntarily (removing seal for packer).
At present, it is by the sand in strainer filtering fracturing fluid that oil field well fracturing work commonly uses force inflatable packer inlet, because filter screen easily damages, fracturing sand effectively can not being stoped to enter Inflatable type packer rubber sleeve inside by considering net, stopping construction, earth pressure release, packing element has sand not regain voluntarily due to inside, during lift pipe string, there is card tubing string event, cause very large loss to field produces.And tool construction is complicated, and cost is high.
In addition, the glue tube base up and down of traditional force inflatable packer and upper lower contact are rigidly connected with screw thread, can only carry out expanded radially and can not realize axial stretching after packing element is connected with upper and lower glue tube base.But because packing element internal pressure is comparatively large in fracturing process, the shoulder after packing element expands gives prominence to that must to get into packing element stuck in the annular space of well inner sleeve, thus the underground work accident that after causing pressure break, tubing string cannot trip out.
Utility model content
The purpose of this utility model is to provide a kind of double acting inflatable packer, avoids fracturing sand and enters Inflatable type packer rubber sleeve inside, solves packing element simultaneously and can only carry out the problem that expanded radially can not realize axial stretching.
The technical scheme realizing above-mentioned purpose is: double acting inflatable packer, comprise top connection, lower contact, the packing element seat of honour, seat under packing element, central tube and packing element, the lower thread of top connection is connected to the upper end of central tube, the top of lower contact is threaded in the lower end of central tube, the described packing element seat of honour, packing element, under packing element, seat is sulfided into outside the central tube that sleeve integrating is contained between top connection and lower contact, the top at the packing element seat of honour is threaded with top connection, it is characterized in that: under described packing element, seat lower slide is sealedly connected on the top of lower contact, the top loop week of lower contact is evenly equipped with shaft orientation liquid feeding hole, lower contact inwall is provided with the radial inlet opening of connection shaft to inlet opening.
Sealing ring is provided with between seat and lower contact under above-mentioned packing element.
Above-mentioned inlet opening be seam wide be the short seam of 0.1-1.2mm, this short seam had both ensured the intensity of central tube, and fracturing sand can be stoped again to enter Inflatable type packer rubber sleeve inside.
Under packing element of the present utility model, seat changes rigid connection structure that is original and lower contact, and to adopt under packing element seat can the centrally axial slide construction of pipe, thus make packing element can centrally pipe axial stretching, packing element reasonable stress, like this, when the complete lift pipe string of pressure break, if packing element shrinks bad, under the pulling force of tubing string, packing element can be forced to extend vertically, force packing element radial contraction, thus solve a sand card difficult problem, trip out fracturing string smoothly.
Liquid of the present utility model enters Inflatable type packer rubber sleeve inside through radial inlet opening and shaft orientation liquid feeding hole and causes packing element to expand, and under liquid-driving packing element, seat moves ahead simultaneously, and packing element is more easily expanded, and sealing effectiveness is better.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is that the A-A of Fig. 1 is to sectional view.
Detailed description of the invention
As shown in Figure 1, comprise seat 4, central tube 5 and packing element 6 under top connection 1, lower contact 2, the packing element seat of honour 3, packing element, the lower thread of top connection 1 is connected to the upper end of central tube 5, the top of lower contact 2 is threaded in the lower end of central tube 5, under the packing element seat of honour 3, packing element 6, packing element, seat 4 is sulfided into outside the central tube 5 that sleeve integrating is contained between top connection 1 and lower contact 2, the top at the packing element seat of honour 3 is threaded with top connection 1, under packing element, seat 4 lower slide is sealedly connected on the top of lower contact 2, is provided with sealing ring 7 under packing element between seat 4 and lower contact 2.
Lower contact 2 be evenly equipped with four shaft orientation liquid feeding holes 8 top loop week, a radial direction through hole 9 is respectively arranged with the correspondence position in four shaft orientation liquid feeding holes 8 in the middle part of lower contact 2, the sheath 12 of enclosed radical through hole 9 is equipped with outside lower contact 2, plunger 10 is respectively arranged with in radial direction through hole 9, each plunger 10 inside wall is provided with and is communicated with respective shaft to the radial inlet opening 11 of inlet opening 8, and radial inlet opening 11 be that stitching wide is the short seam of 0.1-1.2mm.
Claims (3)
1. double acting inflatable packer, comprise top connection, lower contact, the packing element seat of honour, seat under packing element, central tube and packing element, the lower thread of top connection is connected to the upper end of central tube, the top of lower contact is threaded in the lower end of central tube, the described packing element seat of honour, packing element, under packing element, seat is sulfided into outside the central tube that sleeve integrating is contained between top connection and lower contact, the top at the packing element seat of honour is threaded with top connection, it is characterized in that: under described packing element, seat lower slide is sealedly connected on the top of lower contact, the top loop week of lower contact is evenly equipped with shaft orientation liquid feeding hole, lower contact inwall is provided with the radial inlet opening of connection shaft to inlet opening.
2. double acting inflatable packer according to claim 1, is characterized in that: be provided with sealing ring between seat and lower contact under packing element.
3. double acting inflatable packer according to claim 1 and 2, is characterized in that: described radial inlet opening be seam wide be the short seam of 0.1-1.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420728103.5U CN204252932U (en) | 2014-11-28 | 2014-11-28 | Double acting inflatable packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420728103.5U CN204252932U (en) | 2014-11-28 | 2014-11-28 | Double acting inflatable packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204252932U true CN204252932U (en) | 2015-04-08 |
Family
ID=52957252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420728103.5U Active CN204252932U (en) | 2014-11-28 | 2014-11-28 | Double acting inflatable packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204252932U (en) |
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2014
- 2014-11-28 CN CN201420728103.5U patent/CN204252932U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180725 Address after: 225009 No. 188, Weiyang Road, Yangzhou, Jiangsu Co-patentee after: China Petroleum & Chemical Corporation Jiangsu Oilfield Branch Patentee after: Sinopec Corp. Co-patentee after: Jiangsu oil field Mining Development Co., Ltd. Address before: 225009 No. 188, Weiyang Road, Yangzhou, Jiangsu Co-patentee before: China Petroleum & Chemical Corporation Jiangsu Oilfield Branch Patentee before: Sinopec Corp. |
|
| TR01 | Transfer of patent right |