CN202876495U - Wellhead filtration device of water injection well during low-permeability oilfield exploitation - Google Patents
Wellhead filtration device of water injection well during low-permeability oilfield exploitation Download PDFInfo
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- CN202876495U CN202876495U CN201220494853.1U CN201220494853U CN202876495U CN 202876495 U CN202876495 U CN 202876495U CN 201220494853 U CN201220494853 U CN 201220494853U CN 202876495 U CN202876495 U CN 202876495U
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- pipe
- wellhead
- water injection
- injection well
- screen pipe
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Abstract
The utility model discloses a wellhead filtration device of a water injection well during low-permeability oilfield exploitation. The wellhead filtration device comprises a filter pipe body, wherein the upper end of the pipe body is sealed by a pipe body upper cover; the axis of the pipe body penetrates through a central pipe from top to bottom; a main filtration pipe is arranged outside the central pipe; four groups of filtration pipes are arranged on the inner side of the pipe body; a liquid inlet is formed in the middle side wall of the pipe body; an oil pipe water injection opening is formed in the upper side wall of the pipe body; and a sleeve water injection opening and a sewage discharging opening are formed in the bottom side wall of the pipe body. The wellhead filtration device has the advantages that the filtration pipe is trapezoid or wedge-shaped; and a V-shaped opening is formed between slits of a screening pipe. Compared with products based on other designs, the wellhead filtration device provided by the utility model has the advantages that the running is more efficient, and successfulness of filtration of a water source is guaranteed; furthermore, the opening area percentage of the screening pipe and the blocking prevention of the screening pipe are guaranteed; blockage caused by high-density stacking of sediments is avoided; and therefore, the production efficiency is improved, and the service life of a water well is prolonged. An electrochemical anti-corrosion negative electrode stick is added, so that corrosion and oxidization of the injected water to the filtration pipe are reduced.
Description
Technical field
The utility model discloses a kind of filter, be specially wellhead of water injection well filter in a kind of low permeability oil field exploitation.
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 process just and can use.In addition, injected water will pass through long-distance transportation through pipeline from the sewage disposal to the water injection well, will cause secondary pollution like this.The filter of prior art remains in following problem: the screen casing of the screen pipe that 1, uses at present adopts pipe to cut open seam and fish scale cellular type structure more, and pipe to cut open the circulation area of seam be about 10%, the grains of sand easily are stuck in the slit, affect filter effect; The circulation area of fish scale cellular type structure is 30%, and the grains of sand equally easily are stuck in the slit.2, the screen pipe bearing capacity is limited, and the wrapping wire of screen pack damages easily, changes frequent; 3, in course of conveying, the screen pack oxidation that is corroded easily; 4, screen pack cleans inconvenient.
The utility model content
The purpose of this utility model is for wellhead of water injection well filter in a kind of low permeability oil field exploitation is provided, to solve the problems referred to above of prior art.
The purpose of this utility model is achieved through the following technical solutions.
Wellhead of water injection well filter in a kind of low permeability oil field exploitation comprises the filter body, and the body upper end is with cap closure on the body, and the body axis is penetrated with up and down central tube, and the arranged outside of central tube has main screen pipe, and the body inboard is provided with four groups of secondary screen pipes; Be provided with inlet on the sidewall of body middle part, the body upper portion side wall is provided with the oil pipe water filling port, and body 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, to prevent that main screen pipe and secondary screen pipe are by the corrosion in water oxidation.
Described main screen pipe and secondary screen pipe are trapezoidal or the continuous winding of wedge shape wrapping wire forms at the support bar that is circle-shaped vertical arrangement.The slit of screen pipe pipe network forms v-shaped openings.
Described main screen pipe and secondary screen pipe pipe network seam are wide to be 0.3mm.
All be connected by electric welding between described wrapping wire and all vertical supporting bars.
Described central tube lower end is provided with central tube and regulates
Technical solutions of the utility model have following beneficial effect:
1, the application of the trapezoidal or wedge shape wrapping wire of screen pipe forms v-shaped openings between the formula screen pipe opening.This design form is more efficient than other formal product runnings, has guaranteed the smoothness of the source filtration of water; Guarantee simultaneously percentage of open area and the clog-free type of screen casing, avoided sedimentary high density to pile up the obstruction that causes, thereby for assurance is provided the service life of enhancing productivity or prolong well.
2, the wrapping wire of screen pipe is connected with electric welding between all vertical supporting bars, and durable, the working life cycle is more permanent.Simultaneously, the design of vertical supporting bar and screen pipe continuity slit design are so that product possesses higher compressive property.
3, increase the electrochemical anti-corrosive cathode bar, guaranteed to have reduced the corrosion oxidation of injection water quality to screen pipe.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Among the 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 are regulated cap on the body.
The specific embodiment
Further set forth design feature of the present utility model 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 ends are with 1 sealing of cap on the body, body 7 axis are penetrated with up and down central tube, and the arranged outside of central tube has main screen pipe 6, and body 7 inboards are provided with four groups of secondary screen pipes 4; Be provided with inlet 5 on the body 7 middle part sidewalls, body 7 upper portion side wall are provided with oil pipe water filling port 2, and body 7 bottom sidewalls arrange sleeve pipe water filling port 9 and sewage draining exit 8; Described oil pipe water filling port 2 and sleeve pipe water filling port 9 are communicated with central tube; Sewage draining exit 8 is arranged at main screen pipe 6 outsides.
Between described main screen pipe 6 and secondary screen pipe 4, be provided with some cathode bars 3, to prevent that main screen pipe 6 and secondary screen pipe 4 are by the corrosion in water oxidation.
Described main screen pipe 6 and secondary screen pipe 4 form at the support bar that is circle-shaped vertical arrangement for trapezoidal or the continuous winding of wedge shape wrapping wire.The pipe network slit of screen pipe forms v-shaped openings.
The pipe network seam of described main screen pipe 6 and secondary screen pipe 4 is wide to be 0.3mm.
All be connected by electric welding between described wrapping wire and all vertical supporting bars.
Described central tube lower end is provided with central tube and regulates cap 10.
Filtered mechanical admixture is deposited in the screen pipe, uses a period of time, can open tubing valve, utilizes borehole pressure to carry out backwash, and impurity is discharged by sewage draining exit in the body.
When filtering effect when bad, at first in determining body, do not have in the situation of pressure, take off cap on the body, take out the filter core group, carry out labor cleaning or renew cartridge more.If cathode bar corrodes, also need to change.
The water injection well inlet filter be exactly for the water injection in low-permeability oilfield water quality requirement a kind of fine filtration device.Thereby guarantee the well head water quality reaching standard, satisfy the water filling needs of low permeability oil field.
Claims (7)
1. wellhead of water injection well filter during a low permeability oil field is exploited, comprise the filter body, it is characterized in that: the body upper end is with cap closure on the body, and the body axis is penetrated with up and down central tube, the arranged outside of central tube has main screen pipe, and the body inboard is provided with four groups of secondary screen pipes; Be provided with inlet on the sidewall of body middle part, the body upper portion side wall is provided with the oil pipe water filling port, and body 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: be provided with some cathode bars between described main screen pipe and secondary screen pipe.
3. wellhead of water injection well filter during a kind of low permeability oil field according to claim 1 is exploited, it is characterized in that: described main screen pipe and secondary screen pipe are trapezoidal or the continuous winding of wedge shape wrapping wire forms at the support bar that is circle-shaped vertical arrangement.
4. wellhead of water injection well filter in a kind of low permeability oil field exploitation according to claim 3 is characterized in that: all be connected by electric welding between described wrapping wire and 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: the wide 0.3mm of being of described main screen pipe and secondary screen pipe pipe network seam.
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 slit formation v-shaped openings of screen pipe.
7. wellhead of water injection well filter during a kind of low permeability oil field according to claim 3 is exploited, it 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 |
|---|---|---|---|
| CN201220494853.1U CN202876495U (en) | 2012-09-25 | 2012-09-25 | Wellhead filtration device of water injection well during low-permeability oilfield exploitation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220494853.1U CN202876495U (en) | 2012-09-25 | 2012-09-25 | Wellhead filtration device of water injection well during low-permeability oilfield exploitation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202876495U true CN202876495U (en) | 2013-04-17 |
Family
ID=48067961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220494853.1U Expired - Lifetime CN202876495U (en) | 2012-09-25 | 2012-09-25 | Wellhead filtration device of water injection well during low-permeability oilfield exploitation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202876495U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104225996A (en) * | 2013-06-24 | 2014-12-24 | 上海竞腾科技有限公司 | Filtering device at wellhead of water injection well in exploitation of low-permeability oil field |
-
2012
- 2012-09-25 CN CN201220494853.1U patent/CN202876495U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104225996A (en) * | 2013-06-24 | 2014-12-24 | 上海竞腾科技有限公司 | Filtering device at wellhead of water injection well in exploitation of low-permeability oil field |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130417 |