CN104225996A - Filtering device at wellhead of water injection well in exploitation of low-permeability oil field - Google Patents
Filtering device at wellhead of water injection well in exploitation of low-permeability oil field Download PDFInfo
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- CN104225996A CN104225996A CN201310254860.3A CN201310254860A CN104225996A CN 104225996 A CN104225996 A CN 104225996A CN 201310254860 A CN201310254860 A CN 201310254860A CN 104225996 A CN104225996 A CN 104225996A
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- pipe
- wellhead
- oil field
- injection well
- water injection
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Abstract
The invention discloses a filtering device at a wellhead of a water injection well in exploitation of a low-permeability oil field. The filtering device comprises a filter pipe body, wherein the upper end of the pipe body is closed by an upper cap of the pipe body; a central pipe penetrates through the central axis of the pipe body from top to bottom; the outer side of the central pipe is provided with a main filtering pipe; the inner side of the pipe body is provided with four groups of auxiliary filtering pipes; a liquid inlet is formed in the side wall of the middle part of the pipe body; an oil-pipe water filling port is formed in the side wall of the upper part of the pipe body; and a sleeve water filling port and a sewage discharging port are formed in the side wall of the bottom part of the pipe body. The filtering device disclosed by the invention has the beneficial effects that due to the application of trapezoidal or wedge-shaped wire winding of the filtering pipes, a V-shaped opening is formed by the gaps among sieving pipes. Compared with other forms, the filtering device adopting the design form has the advantages that the operation efficiency of products is higher, and the smoothness of filtering of water sources is guaranteed; simultaneously, the opening area percentage and the non-blocking type of the sieving pipes are guaranteed, and the blocking caused by high-density stacking of precipitates is avoided, so that guarantee is provided for improving the production efficiency or prolonging the service life of the water well; and due to the addition of electro-chemical anti-corrosion cathode bars, the reduction of the corrosion and the oxidation by the quality of filled water to the filtering pipes is guaranteed.
Description
Technical field
The invention discloses a kind of filter, be specially wellhead of water injection well filter in the exploitation of a kind of low permeability oil field.
Background technology
Low permeability oil field refers to Oil Layer Reservoir permeability ground, the oil field that abundance is low, single well productivity is low.In the exploitation of low permeability oil field, water flooding recovery remains main oil production method.Low permeability oil field is very high to the requirement of injection water quality, must carry out processing just can using.In addition, inject water and through long-distance transportation through pipeline, will will cause secondary pollution like this from sewage disposal to water injection well.The filter of prior art remains in following problem: screen casing many employings pipe of the screen pipe 1, used at present cuts open seam and fish scale cellular type structure, and the circulation area that pipe cuts open seam is about 10%, and the grains of sand are easily stuck in gap, affect filter effect; The circulation area of fish scale cellular type structure is 30%, and the grains of sand are equally easily stuck in gap.2, screen pipe bearing capacity is limited, and the wrapping wire of screen pack easily damages, and changes frequent; 3, in course of conveying, screen pack is easily corroded oxidation; 4, screen pack cleaning is inconvenient.
Summary of the invention
The object of the invention is to provide wellhead of water injection well filter in the exploitation of a kind of low permeability oil field, to solve the problems referred to above of prior art.
The object of the invention is to be achieved through the following technical solutions.
Wellhead of water injection well filter in a kind of low permeability oil field exploitation, comprise filter body, body upper end is with cap closure on body, and body axis is run through up and down central tube, and the arranged outside of central tube has main screen pipe, is provided with four groups of secondary screen pipes inside body; In the middle part of body, sidewall is provided with inlet, body upper portion side wall is provided with oil pipe water filling port, and its bottom sidewall arranges sleeve pipe water filling port and sewage draining exit.
Between described main screen pipe and secondary screen pipe, be provided with some cathode bars, be oxidized by corrosion in water to prevent main screen pipe and secondary screen pipe.
Described main screen pipe and secondary screen pipe are trapezoidal or the continuous winding of wedge shape wrapping wire is formed on the support bar that circumferentially shape vertically arranges.The gap of screen pipe pipe network forms v-shaped openings.
It is 0.3mm that described main screen pipe and secondary screen pipe pipe network stitch wide.
All be connected by electric welding between described wrapping wire with all vertical supporting bars.
Described central tube lower end is provided with central tube and regulates
Technical solution of the present invention has following beneficial effect:
1, the application of the trapezoidal or wedge shape wrapping wire of screen pipe, forms v-shaped openings between formula screen pipe opening.This design form is more efficient than the running of other formal products, ensure that the smoothness that the source of water is filtered; Ensure that the percentage of open area of screen casing and without hindrance plunger type simultaneously, avoid sedimentary high density and pile up the obstruction caused, thus for providing guarantee the service life of enhancing productivity or extend well.
2, the wrapping wire of screen pipe is connected with the electric welding between all vertical supporting bars, and durable, the working life cycle is more permanent.Meanwhile, the design of vertical supporting bar and screen pipe continuity slit design, make product possess higher compressive property.
3, add electrochemical anti-corrosive cathode bar, ensure to decrease the corrosion oxidation of injection water quality to screen pipe.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
In figure: 1, cap 2, oil pipe water main 3, cathode bar 4, secondary screen pipe 5, inlet 6, main screen pipe 7, body 8, sewage draining exit 9, sleeve pipe water filling port 10, central tube adjustment cap on body.
Detailed description of the invention
Design feature of the present invention is set forth further below in conjunction with accompanying drawing and specific embodiment.
As shown in Figure 1, wellhead of water injection well filter in a kind of low permeability oil field exploitation, comprises filter body 7, body 7 upper end is closed with cap on body 1, body 7 axis is run through up and down central tube, and the arranged outside of central tube has main screen pipe 6, is provided with four groups of secondary screen pipes 4 inside body 7; In the middle part of body 7, sidewall is provided with inlet 5, body 7 upper portion side wall is provided with oil pipe water filling port 2, and bottom body 7, sidewall arranges sleeve pipe water filling port 9 and sewage draining exit 8; Described oil pipe water filling port 2 is communicated with central tube with sleeve pipe water filling port 9; Sewage draining exit 8 is arranged at outside main screen pipe 6.
Between described main screen pipe 6 and secondary screen pipe 4, be provided with some cathode bars 3, be oxidized by corrosion in water to prevent main screen pipe 6 and secondary screen pipe 4.
Described main screen pipe 6 and secondary screen pipe 4 are trapezoidal or the continuous winding of wedge shape wrapping wire is formed on the support bar that circumferentially shape vertically arranges.The pipe network gap of screen pipe forms v-shaped openings.
The pipe network seam of described main screen pipe 6 and secondary screen pipe 4 is wide is 0.3mm.
All be connected by electric welding between described wrapping wire with all vertical supporting bars.
Described central tube lower end is provided with central tube adjustment cap 10.
Filtered mechanical admixture is deposited in screen pipe, and use a period of time, can open tubing valve, utilize borehole pressure to carry out backwash, in body, impurity is discharged by sewage draining exit.
When filter effect is bad, first when determining not have pressure in body, taking off cap on body, taking out filter core group, carry out labor cleaning or more renew cartridge.If cathode bar corrodes, also need to change.
Water injection well inlet filter be exactly for water injection in low-permeability oilfield water quality requirement a kind of fine filtration device.Thus guarantee well head water quality reaching standard, meet the water filling needs of low permeability oil field.
Claims (7)
1. wellhead of water injection well filter in a low permeability oil field exploitation, comprise filter body, it is characterized in that: body upper end is with cap closure on body, and body axis is run through up and down central tube, the arranged outside of central tube has main screen pipe, is provided with four groups of secondary screen pipes inside body; In the middle part of body, sidewall is provided with inlet, body upper portion side wall is provided with oil pipe water filling port, and its bottom sidewall arranges sleeve pipe water filling port and sewage draining exit.
2. wellhead of water injection well filter in a kind of low permeability oil field exploitation according to claim 1, is characterized in that: between described main screen pipe and secondary screen pipe, be provided with some cathode bars.
3. wellhead of water injection well filter in a kind of low permeability oil field exploitation according to claim 1, is characterized in that: described main screen pipe and secondary screen pipe are trapezoidal or the continuous winding of wedge shape wrapping wire is formed on the support bar that circumferentially shape vertically arranges.
4. wellhead of water injection well filter in a kind of low permeability oil field exploitation according to claim 3, be is characterized in that: be all connected by electric welding between described wrapping wire with all vertical supporting bars.
5. wellhead of water injection well filter in a kind of low permeability oil field exploitation according to claim 3, is characterized in that: it is 0.3mm that described main screen pipe and secondary screen pipe pipe network stitch wide.
6. wellhead of water injection well filter in a kind of low permeability oil field exploitation according to claim 3, is characterized in that: the pipe network gap of screen pipe forms v-shaped openings.
7. wellhead of water injection well filter in a kind of low permeability oil field exploitation according to claim 3, is characterized in that: described central tube lower end is provided with central tube and regulates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310254860.3A CN104225996A (en) | 2013-06-24 | 2013-06-24 | Filtering device at wellhead of water injection well in exploitation of low-permeability oil field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310254860.3A CN104225996A (en) | 2013-06-24 | 2013-06-24 | Filtering device at wellhead of water injection well in exploitation of low-permeability oil field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104225996A true CN104225996A (en) | 2014-12-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310254860.3A Pending CN104225996A (en) | 2013-06-24 | 2013-06-24 | Filtering device at wellhead of water injection well in exploitation of low-permeability oil field |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107973350A (en) * | 2016-10-25 | 2018-05-01 | 中国石油化工股份有限公司 | Wellhead of water injection well water treatment method |
| CN111729383A (en) * | 2020-06-19 | 2020-10-02 | 肖云东 | Water injection automatic filtration backwash device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2203405C1 (en) * | 2002-07-29 | 2003-04-27 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | Method of development of oil field |
| CN201137463Y (en) * | 2007-12-12 | 2008-10-22 | 崔富国 | Multiple co-seepage corrosion resistant oil extraction water injection oil conduit |
| CN201443381U (en) * | 2009-06-01 | 2010-04-28 | 中国石油化工股份有限公司胜利油田分公司桩西采油厂 | Water injection well filter |
| CN202250004U (en) * | 2011-10-21 | 2012-05-30 | 中国石油化工股份有限公司 | Closed layered water injection process pipe column |
| CN202876495U (en) * | 2012-09-25 | 2013-04-17 | 上海竞腾科技有限公司 | Wellhead filtration device of water injection well during low-permeability oilfield exploitation |
-
2013
- 2013-06-24 CN CN201310254860.3A patent/CN104225996A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2203405C1 (en) * | 2002-07-29 | 2003-04-27 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | Method of development of oil field |
| CN201137463Y (en) * | 2007-12-12 | 2008-10-22 | 崔富国 | Multiple co-seepage corrosion resistant oil extraction water injection oil conduit |
| CN201443381U (en) * | 2009-06-01 | 2010-04-28 | 中国石油化工股份有限公司胜利油田分公司桩西采油厂 | Water injection well filter |
| CN202250004U (en) * | 2011-10-21 | 2012-05-30 | 中国石油化工股份有限公司 | Closed layered water injection process pipe column |
| CN202876495U (en) * | 2012-09-25 | 2013-04-17 | 上海竞腾科技有限公司 | Wellhead filtration device of water injection well during low-permeability oilfield exploitation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107973350A (en) * | 2016-10-25 | 2018-05-01 | 中国石油化工股份有限公司 | Wellhead of water injection well water treatment method |
| CN111729383A (en) * | 2020-06-19 | 2020-10-02 | 肖云东 | Water injection automatic filtration backwash device |
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Application publication date: 20141224 |