CN103912235A - Underground sealing structure suitable for thermal production well - Google Patents
Underground sealing structure suitable for thermal production well Download PDFInfo
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- CN103912235A CN103912235A CN201410145570.XA CN201410145570A CN103912235A CN 103912235 A CN103912235 A CN 103912235A CN 201410145570 A CN201410145570 A CN 201410145570A CN 103912235 A CN103912235 A CN 103912235A
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Abstract
The invention discloses an underground sealing structure suitable for a thermal production well. The underground sealing structure comprises a metal packer, an oil extraction pipe and a metal sand barrier; the metal packer comprises an upper cone body, a metal sealing anchor and a lower cone body, the lower end of the upper cone body is inserted in the upper part of the metal sealing anchor, the lower end of the upper cone body is a cone body which is shrank gradually from top to bottom, the metal sealing anchor is made of elastic alloy, the upper end of the lower cone body is inserted in the lower part of the metal sealing anchor, and the upper end of the lower cone body is a cone body which is shrank gradually from bottom to top; the metal sand barrier is fixed at the lower end of the oil extraction pipe and is inserted in a top sand-proof packer, and the upper end of the oil extraction pipe is in thread connection with the lower end of the lower cone body. By means of the all-metal sealing structure, the underground sealing structure is capable of satisfying the steam injection requirement of a thermal production steam injection well, guarantees that the steam injection sealing is effective in long time, has strong sealing ability, is capable of effectively preventing a steam huff and puff well producing sand, enables the huff and puff turns to be prolonged, and enables the recovery efficiency to be improved.
Description
Technical field
The present invention relates to the down-hole hermetically-sealed construction of a kind of hermetically-sealed construction, particularly a kind of applicable thermal production well.
Background technology
Steam soak and steam flooding are the effective technology methods of thickened oil recovery.Viscous crude payzone is poor because compacting diagenesis acts on, reservoir loose cementation, in exploitation via steam injection process, because the strong souring of high speed steam injection is in rock stratum particle, change after rock particles surface wettability at high temperature and high pressure steam, rock stratum particle is peeled off out from the cementing aggregate of crude oil asphalitine, forms the potential hazard shaking out.The phenomenon of shaking out in heating exploitation process is very general and serious, bring harm to production, adopt after various anti-sand process technologies, although can receive certain sand controlling result, but because of the pit shaft of heat injection exploitation at present sand control installation heatproof index used can not reach the temperature requirement of steam injection, there is the potential danger of shaking out in pit shaft.Once pit shaft shakes out, will cause oil well production normally not carry out, well phenomenon even occurs lying.
Summary of the invention
The present invention provides a kind of down-hole hermetically-sealed construction of applicable thermal production well for solving the technical problem existing in known technology.
The technical scheme that the present invention takes for the technical problem existing in solution known technology is: a kind of down-hole hermetically-sealed construction of applicable thermal production well, comprises metal packer, oil recovery oil pipe and metal resistance sand device; Described metal packer comprises upper cone, metal sealing anchor and lower cone, the bottom of described upper cone is inserted into the top of described metal sealing anchor, the bottom of described upper cone is the cone of shrinking gradually from top to bottom, described metal sealing anchor is made up of elastic alloy, the upper end of described lower cone is inserted into the bottom of described metal sealing anchor, and the upper end of described lower cone is the cone of shrinking gradually from bottom to up; Described metal resistance sand device is fixed on the lower end of described oil recovery oil pipe, and is inserted in sand control top packer, and the upper end of described oil recovery oil pipe is threaded with the bottom of described lower cone.
The cone angle of the bottom cone of described upper cone is 7～10 °; The cone angle of the upper end cone of described lower cone is 7～10 °.
Advantage and good effect that the present invention has are: adopt all-metal sealing structure, can meet the steam injection requirement of thermal recovery steam injection well, guarantee that long-time steam injection sealing do not lose efficacy, sealability is strong, can effectively stop steam-stimulated well to shake out, extend the oil well round of handling up, improve recovery ratio.The invention solves in thermal production of heavy oil wells manufacturing process and can not normally carry out because formation sand production causes oil well production, even occur lying well state and the workover treatment of having to frequently carry out, the difficult problem that thickened oil recovery operating cost is raise.In viscous crude heating exploitation process, can prevent that oil well from seriously shaking out, by shaking out, the impact of oil well be dropped to minimumly, in long-time steam injection process, there will not be the phenomenon of sand control seal failure.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is metal packer structural representation of the present invention.
In figure: 1, metal packer; 2, oil recovery oil pipe; 3, metal resistance sand device; 4, sand control top packer; 1-1, upper cone; 1-2, metal sealing anchor; 1-3, lower cone.
Detailed description of the invention
For further understanding summary of the invention of the present invention, Characteristic, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Refer to Fig. 1 and Fig. 2, a kind of down-hole hermetically-sealed construction of applicable thermal production well, comprises metal packer 1, oil recovery oil pipe 2 and metal resistance sand device 3; Described metal packer 1 comprises upper cone 1-1, metal sealing anchor 1-2 and lower cone 1-3, the bottom of described upper cone 1-1 is inserted into the top of described metal sealing anchor 1-2, the bottom of described upper cone 1-1 is the cone of shrinking gradually from top to bottom, described metal sealing anchor 1-2 is made up of elastic alloy, the upper end of described lower cone 1-3 is inserted into the bottom of described metal sealing anchor 1-2, and the upper end of described lower cone 1-3 is the cone of shrinking gradually from bottom to up; Described metal resistance sand device 3 is fixed on the lower end of described oil recovery oil pipe 2, and is inserted in sand control top packer 4, and the upper end of described oil recovery oil pipe 2 is threaded with the bottom of described lower cone 1-3.
In the present embodiment, the cone angle of the bottom cone of described upper cone 1-1 is 7-10 °; The cone angle of the upper end cone of described lower cone 1-3 is 7-10 °.
When installation, adopt the lower end of oil recovery oil pipe 2 to carry metal resistance sand device 3, the screen casing that metal resistance sand device 3 inserts sealing by peripheral hardware metal forms; The upper end of oil recovery oil pipe 2 is connected with metal packer 1, by setting tubing string, the setting tool of metal packer and metal packer are lowered into precalculated position, and metal is hindered to sand device be inserted in sand control top packer, make the sealing light cylinder of metal resistance sand device and sand control top packer form metal sealing, as effectively supplementing sand control pipe in oil well.Adopt power setting tool to upper cone 1-1 and the lower cone 1-3 application of force, they are moved to the inside of metal sealing anchor, and then radially strut the two ends up and down of metal sealing anchor, metal sealing anchor is set in sleeve pipe.So far the installation of completed well lower seal structure.Because this down-hole hermetically-sealed construction is all metal construction, can meet the temperature requirement of 350 DEG C, realize down-hole sealing effect of steamed well.
The installation steps of above-mentioned hermetically-sealed construction are:
1) first, the assembling of completed well lower seal structure, is then connected to by the down-hole hermetically-sealed construction after assembling the bottom that sets tubing string;
2) down-hole hermetically-sealed construction is lowered into design attitude in well, and metal is hindered to sand device is inserted in sand control top packer; Then implement the operation that sets of metal packer, complete after the setting of metal packer, trip out and set tubing string;
3) be lowered to again steam injection string, with metal packer Butt sealing;
4) carry out steam injection operation, complete the heating exploitation in oil field.
Although by reference to the accompanying drawings the preferred embodiments of the present invention are described above; but the present invention is not limited to above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not departing from the scope situation that aim of the present invention and claim protect, can also make a lot of forms, within these all belong to protection scope of the present invention.
Claims (2)
1. a down-hole hermetically-sealed construction for applicable thermal production well, is characterized in that, comprises metal packer, oil recovery oil pipe and metal resistance sand device; Described metal packer comprises upper cone, metal sealing anchor and lower cone, the bottom of described upper cone is inserted into the top of described metal sealing anchor, the bottom of described upper cone is the cone of shrinking gradually from top to bottom, described metal sealing anchor is made up of elastic alloy, the upper end of described lower cone is inserted into the bottom of described metal sealing anchor, and the upper end of described lower cone is the cone of shrinking gradually from bottom to up; Described metal resistance sand device is fixed on the lower end of described oil recovery oil pipe, and is inserted in sand control top packer, and the upper end of described oil recovery oil pipe is threaded with the bottom of described lower cone.
2. the down-hole hermetically-sealed construction of applicable thermal production well according to claim 1, is characterized in that, the cone angle of the bottom cone of described upper cone is 7～10 °; The cone angle of the upper end cone of described lower cone is 7～10 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410145570.XA CN103912235A (en) | 2014-04-11 | 2014-04-11 | Underground sealing structure suitable for thermal production well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410145570.XA CN103912235A (en) | 2014-04-11 | 2014-04-11 | Underground sealing structure suitable for thermal production well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103912235A true CN103912235A (en) | 2014-07-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410145570.XA Pending CN103912235A (en) | 2014-04-11 | 2014-04-11 | Underground sealing structure suitable for thermal production well |
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| CN (1) | CN103912235A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2428264A (en) * | 2004-03-12 | 2007-01-24 | Schlumberger Holdings | Sealing system with swellable material |
| CN2903354Y (en) * | 2005-12-01 | 2007-05-23 | 大庆油田有限责任公司 | Pressing crack saling working drum |
| CN201705218U (en) * | 2010-06-13 | 2011-01-12 | 中国石油化工股份有限公司 | Tubing string with thick oil underground returning thermal production blockage technique |
| CN202788645U (en) * | 2012-09-21 | 2013-03-13 | 刘攀 | Novel oil extraction tubular column of oil field |
| WO2013062566A1 (en) * | 2011-10-28 | 2013-05-02 | Halliburton Energy Services, Inc. | Downhole packer assembly having a selective fluid bypass and method for use thereof |
| CN203239308U (en) * | 2013-03-05 | 2013-10-16 | 中国石油天然气股份有限公司 | Seepage type steam flow control device and thermal recovery steam injection pipe column |
| CN203362104U (en) * | 2013-07-17 | 2013-12-25 | 延长油田股份有限公司川口采油厂 | Sand-up prevention packer |
-
2014
- 2014-04-11 CN CN201410145570.XA patent/CN103912235A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2428264A (en) * | 2004-03-12 | 2007-01-24 | Schlumberger Holdings | Sealing system with swellable material |
| CN2903354Y (en) * | 2005-12-01 | 2007-05-23 | 大庆油田有限责任公司 | Pressing crack saling working drum |
| CN201705218U (en) * | 2010-06-13 | 2011-01-12 | 中国石油化工股份有限公司 | Tubing string with thick oil underground returning thermal production blockage technique |
| WO2013062566A1 (en) * | 2011-10-28 | 2013-05-02 | Halliburton Energy Services, Inc. | Downhole packer assembly having a selective fluid bypass and method for use thereof |
| CN202788645U (en) * | 2012-09-21 | 2013-03-13 | 刘攀 | Novel oil extraction tubular column of oil field |
| CN203239308U (en) * | 2013-03-05 | 2013-10-16 | 中国石油天然气股份有限公司 | Seepage type steam flow control device and thermal recovery steam injection pipe column |
| CN203362104U (en) * | 2013-07-17 | 2013-12-25 | 延长油田股份有限公司川口采油厂 | Sand-up prevention packer |
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Application publication date: 20140709 |