CN104033139A - Corrosion and leakage preventing production pipe column of CO2 oil displacement injection well - Google Patents
Corrosion and leakage preventing production pipe column of CO2 oil displacement injection well Download PDFInfo
- Publication number
- CN104033139A CN104033139A CN201410277757.5A CN201410277757A CN104033139A CN 104033139 A CN104033139 A CN 104033139A CN 201410277757 A CN201410277757 A CN 201410277757A CN 104033139 A CN104033139 A CN 104033139A
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- Prior art keywords
- corrosion
- packer
- oil pipe
- sliding sleeve
- oil
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- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses a corrosion and leakage preventing production pipe column of a CO2 oil displacement injection well. The corrosion and leakage preventing production pipe column comprises a bell mouth, a corrosion monitoring ring, a packer and a sliding sleeve switch, wherein the upper end of the bell mouth is connected with the lower end of the corrosion monitoring ring through an oil pipe; the upper end of the corrosion monitoring ring is connected with the lower end of the packer through the oil pipe; the upper end of the packer is connected with the lower end of the sliding sleeve switch; the upper end of the sliding sleeve switch is connected with the oil pipe; the bell mouth, the corrosion monitoring ring, the packer, the sliding sleeve switch and the oil pipe are all inserted in an inner cavity of a bushing; and protecting liquid is filled in annular spaces of the oil pipe and the bushing. The corrosion and leakage preventing production pipe column has a simple structure, is tight and reliable, and can act effects of corrosion prevention and leakage prevention.
Description
Technical field
The present invention relates to a kind of anti-corrosion leak-proof and leak flow string, particularly a kind of CO
2displacement of reservoir oil Injection Well anti-corrosion leak-proof leaks flow string.
Background technology
At present, CO
2the displacement of reservoir oil is the effective technology means that improve LOW PERMEABILITY RESERVOIR recovery ratio, and at home and abroad all there is application in oil field.Due to CO
2after meeting water, can cause heavy corrosion to carbon steel; therefore require injection string to there is certain antiseptic property; also need Injection Well production casing that effective protection is provided simultaneously; insert the on-the-spot application of sealing tubing string comparatively extensive; dependable performance, but its cost is higher, and it is more to enter well tool; complicated construction technique, is therefore not suitable at CO
2generally apply at oil displacement test scene.
Summary of the invention
The object of the invention is adopting CO in order to solve
2the displacement of reservoir oil is carried out in oil extraction process, the serious and existing sealing tubing string cost complicated problem of high construction of casing corrosion and a kind of CO of providing
2displacement of reservoir oil Injection Well anti-corrosion leak-proof leaks flow string.
CO of the present invention
2displacement of reservoir oil Injection Well anti-corrosion leak-proof leaks flow string and includes horn mouth, corrosion monitoring ring, packer and sliding sleeve switch; wherein bell-mouthed upper end is connected with the lower end of corrosion monitoring ring by oil pipe; the upper end of corrosion monitoring ring is connected with packer lower end by oil pipe; the upper end of packer is connected with the lower end of sliding sleeve switch; the upper end connected pipes of sliding sleeve switch; horn mouth, corrosion monitoring ring, packer, sliding sleeve switch and oil pipe are all plugged in the inner chamber of sleeve pipe, are filled with protection liquid in the annular space of oil pipe and sleeve pipe.
The model of packer is Y521-115 type, is positioned at 20-30m on gas injection layer.
Oil pipe is hermetic seal oil pipe.
Protection liquid is-20
#diesel oil.
Use principle of the present invention:
When being full of in the annular space between oil pipe and sleeve pipe after protection liquid, above carry oil pipe, after the 5-10 that turns clockwise circle, transfer, make Y521 packer setting, thereby make the annular space sealing between oil pipe and sleeve pipe.
Beneficial effect of the present invention:
Start to note CO
2after, the hydraulic anchor anchor fluke on packer is protruding clamping internal surface of sleeve pipe under hydraulic action, prevents string creep; Hermetic seal oil pipe can prevent that gas permeation to tubing and casing annular space from causing corrosion; Y521 packer and annular protective liquid can effectively protect annular space not to be subject to CO
2the impact of corrosion; Sliding sleeve switch be opened or be closed to later stage can by steel wire operation, changes protection liquid and well-flushing, kill job thereby realize.The present invention is simple in structure, and sealing is reliable, can play anticorrosion and effect antiseep.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
1, horn mouth 2, corrosion monitoring ring 3, packer 4, sliding sleeve switch
5, oil pipe 6, sleeve pipe 7, protection liquid.
Detailed description of the invention
Refer to shown in Fig. 1:
CO of the present invention
2displacement of reservoir oil Injection Well anti-corrosion leak-proof leaks flow string and includes horn mouth 1, corrosion monitoring ring 2, packer 3 and sliding sleeve switch 4; wherein the upper end of horn mouth 1 is connected with the lower end of corrosion monitoring ring 2 by oil pipe; the upper end of corrosion monitoring ring 1 is connected with packer 3 lower ends by oil pipe; the upper end of packer 3 is connected with the lower end of sliding sleeve switch 4; the upper end connected pipes 5 of sliding sleeve switch 4; horn mouth 1, corrosion monitoring ring 2, packer 3, sliding sleeve switch 4 and oil pipe 5 are all plugged in the inner chamber of sleeve pipe 6, are filled with protection liquid 7 in the annular space of oil pipe 5 and sleeve pipe 6.
The model of packer 3 is Y521-115 type, is positioned at 20-30m on gas injection layer.
Oil pipe 5 is hermetic seal oil pipe.
Protection liquid 7 is-20
#diesel oil.
Use principle of the present invention:
When being full of in the annular space between oil pipe 5 and sleeve pipe 6 after protection liquid, above carry oil pipe 5, after the 5-10 that turns clockwise circle, transfer, Y521 type packer 3 is set, thereby make the annular space sealing between oil pipe 5 and sleeve pipe 6.
Claims (4)
1. a CO
2displacement of reservoir oil Injection Well anti-corrosion leak-proof leaks flow string; it is characterized in that: include horn mouth, corrosion monitoring ring, packer and sliding sleeve switch; wherein bell-mouthed upper end is connected with the lower end of corrosion monitoring ring by oil pipe; the upper end of corrosion monitoring ring is connected with packer lower end by oil pipe; the upper end of packer is connected with the lower end of sliding sleeve switch; the upper end connected pipes of sliding sleeve switch; horn mouth, corrosion monitoring ring, packer, sliding sleeve switch and oil pipe are all plugged in the inner chamber of sleeve pipe, are filled with protection liquid in the annular space of oil pipe and sleeve pipe.
2. a kind of CO according to claim 1
2displacement of reservoir oil Injection Well anti-corrosion leak-proof leaks flow string, it is characterized in that: the model of described packer is Y521-115 type, is positioned at 20-30m on gas injection layer.
3. a kind of CO according to claim 1
2displacement of reservoir oil Injection Well anti-corrosion leak-proof leaks flow string, it is characterized in that: described oil pipe is hermetic seal oil pipe.
4. a kind of CO according to claim 1
2displacement of reservoir oil Injection Well anti-corrosion leak-proof leaks flow string, it is characterized in that: described protection liquid is-20
#diesel oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410277757.5A CN104033139A (en) | 2014-06-20 | 2014-06-20 | Corrosion and leakage preventing production pipe column of CO2 oil displacement injection well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410277757.5A CN104033139A (en) | 2014-06-20 | 2014-06-20 | Corrosion and leakage preventing production pipe column of CO2 oil displacement injection well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104033139A true CN104033139A (en) | 2014-09-10 |
Family
ID=51464106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410277757.5A Pending CN104033139A (en) | 2014-06-20 | 2014-06-20 | Corrosion and leakage preventing production pipe column of CO2 oil displacement injection well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104033139A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2903367Y (en) * | 2005-12-01 | 2007-05-23 | 大庆油田有限责任公司 | Movable multifunctional under well corrosion monitoring apparatus |
| US20080264644A1 (en) * | 2007-04-27 | 2008-10-30 | Ralph Sawtell | Method and apparatus for connecting drilling riser strings and compositions thereof |
| CN203081411U (en) * | 2012-12-10 | 2013-07-24 | 中国石油天然气股份有限公司 | Antiseptic, anti-scale and gas-lift integral completion pipe string |
| CN203175532U (en) * | 2012-12-28 | 2013-09-04 | 中国石油天然气股份有限公司 | Movable type acidic gas well underground corrosion monitoring device |
| CN203626623U (en) * | 2013-11-08 | 2014-06-04 | 中国石油天然气股份有限公司 | Natural gas well annulus protection oil casing with self-sealing capacity |
| CN203879474U (en) * | 2014-06-20 | 2014-10-15 | 中国石油化工股份有限公司 | CO2 oil displacement injection well anticorrosion anti-seepage production tubular column |
-
2014
- 2014-06-20 CN CN201410277757.5A patent/CN104033139A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2903367Y (en) * | 2005-12-01 | 2007-05-23 | 大庆油田有限责任公司 | Movable multifunctional under well corrosion monitoring apparatus |
| US20080264644A1 (en) * | 2007-04-27 | 2008-10-30 | Ralph Sawtell | Method and apparatus for connecting drilling riser strings and compositions thereof |
| CN203081411U (en) * | 2012-12-10 | 2013-07-24 | 中国石油天然气股份有限公司 | Antiseptic, anti-scale and gas-lift integral completion pipe string |
| CN203175532U (en) * | 2012-12-28 | 2013-09-04 | 中国石油天然气股份有限公司 | Movable type acidic gas well underground corrosion monitoring device |
| CN203626623U (en) * | 2013-11-08 | 2014-06-04 | 中国石油天然气股份有限公司 | Natural gas well annulus protection oil casing with self-sealing capacity |
| CN203879474U (en) * | 2014-06-20 | 2014-10-15 | 中国石油化工股份有限公司 | CO2 oil displacement injection well anticorrosion anti-seepage production tubular column |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140910 |
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| RJ01 | Rejection of invention patent application after publication |