CN201254980Y - Sand cleaning device for injection well - Google Patents
Sand cleaning device for injection well Download PDFInfo
- Publication number
- CN201254980Y CN201254980Y CNU2008201717524U CN200820171752U CN201254980Y CN 201254980 Y CN201254980 Y CN 201254980Y CN U2008201717524 U CNU2008201717524 U CN U2008201717524U CN 200820171752 U CN200820171752 U CN 200820171752U CN 201254980 Y CN201254980 Y CN 201254980Y
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- CN
- China
- Prior art keywords
- inner tube
- joint
- water injection
- sand
- well
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a sand cleaning device of a water injection well, which consists of an upper joint, an outer cylinder, a suspension joint, an inner tube and a blocking joint. The lower part of the upper joint is linked with the upper part of the outer cylinder; the suspension joint is linked with the upper part of the inner tube; the suspension joint and the inner tube are arranged in the outer cylinder; the blocking joint is arranged at the lower part of the outer cylinder; the inner tube penetrates through the blocking joint; the lower part of the outer cylinder is linked with a through hole; and a seal ring is arranged on the outer cylindrical surface of the suspension joint. After the inner tube is buried in sand at the lower starting point, the well is flushed reversely; the water flushing pressure can be transmitted into the annular space between the outer cylinder and the inner tube through the through hole; then the inner tube moves upwards; the lower part of the inner tube is exposed out of the sand surface; and the well flushing water flows in through the lower part of the inner tube and flows out through the water injection pipe, and carries away the sand in the out-flowing process through the water injection pipe. Therefore, the sand can be eliminated; the water injected can be resumed in the water injection well; the repair for the water injection well is avoided; the well repair cost is saved; the environmental pollution is prevented; and the utility model can lead to significant economic benefits and social benefits.
Description
One, technical field
The utility model is the downhole tool of used for water injection wells in oil fields, particularly a kind of water injection well fettling installation.
Two, background technology
In the oilfield development process, to the stratum water filling is the effective way of keeping reservoir pressure and energy, because the formation cementation of water injection well is loose, in pit shaft, tell sand easily, cause sand to bury water injection string and water filling layer, after water injection string or water filling layer are buried by sand, just can not water filling, water injection well stops production, and reservoir pressure descends, and causes the oil well underproduction.In order to make the normal water filling of water injection well, must carry out workover treatment removing sand and bury, water filling again, workover treatment will drop into the operation workover cost to water injection well, also can increase environment pollution.
Three, summary of the invention
The purpose of this utility model is a kind of water injection well fettling installation of design, and it is removed the pit shaft sand by anti-flushing well, reduces workover treatment.
The purpose of this utility model is achieved in that by top connection, urceolus, suspension joint, interior pipe, retaining joint to be formed, the top connection bottom connects with urceolus top, pipe top in suspension joint is connected in, suspension joint, interior pipe are in the urceolus, the retaining joint is installed in the urceolus bottom, interior pipe passes the retaining joint, and linked hole is arranged at the urceolus bottom.
The suspension joint external cylindrical surface is installed sealing ring.
The beneficial effects of the utility model are: after initial point was buried by sand under interior pipe was in, anti-flushing well, well-flushing pressure enters annular space between urceolus and the interior pipe through linked hole, pipe is up in making, the sand face is exposed in interior pipe bottom, well-flushing water can enter through interior pipe bottom, go out from the water injection pipe internal return, well-flushing water carries away sand returning out in the process to water injection pipe, thereby removes sand, makes water injection well recover water filling, avoid the water injection well workover treatment, save workover cost, avoid environment pollution, have remarkable economic efficiency and social benefit.
Four, description of drawings
Accompanying drawing is the assembling drawing of the utility model embodiment.
Five, the specific embodiment
Below in conjunction with accompanying drawing the utility model embodiment is described.
Embodiment of the present utility model is made up of top connection 1, urceolus 2, sealing ring 3, suspension joint 4, interior pipe 5, retaining joint 6, top connection 1 bottom connects with urceolus 2 tops, pipe 5 tops in suspension joint 4 is connected in, suspension joint 4, interior pipe 5 are in the urceolus 2, retaining joint 6 is installed in urceolus 2 bottoms, interior pipe 5 passes retaining joint 6, and linked hole 7 is arranged at urceolus 2 bottoms.Suspension joint 4 external cylindrical surfaces are installed sealing ring 3.Interior pipe 5 bottoms are pointed, are convenient to sand washing, improve the sand washing effect.
When the utility model is gone into the well water filling, interior pipe 5 is in initial point down, after shaking out, water injection well will bury interior pipe (5) bottom, water injection rate descends or does not have water injection rate, this moment anti-flushing well, well-flushing pressure enters annular space between urceolus 2 and the interior pipe 5 through linked hole 7, and pipe 5 is up in making, and the sand face is exposed in interior pipe 5 bottoms, well-flushing water can enter through interior pipe 5 bottoms, go out from the water injection pipe internal return, well-flushing water carries away sand returning out in the process to water injection pipe, after the sand face descends, urceolus 2, annular space between the interior pipe 5 is identical with the pressure in the interior pipe, in pipe 5 descending in the deadweight effect, the sand face is constantly descended, thereby removes sand.Make water injection well recover water filling.
Claims (3)
1, a kind of water injection well fettling installation, it is characterized in that: form by top connection (1), urceolus (2), suspension joint (4), interior pipe (5), retaining joint (6), top connection (1) bottom connects with urceolus (2) top, suspension joint (4) is connected in interior pipe (5) top, suspension joint (4), interior pipe (5) are in the urceolus (2), retaining joint (6) is installed in urceolus (2) bottom, and interior pipe (5) passes retaining joint (6), and linked hole (7) is arranged at urceolus (2) bottom.
2, water injection well fettling installation according to claim 1 is characterized in that: suspension joint (4) external cylindrical surface is installed sealing ring (3).
3, water injection well fettling installation according to claim 1 is characterized in that: interior pipe (5) bottom is pointed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201717524U CN201254980Y (en) | 2008-09-18 | 2008-09-18 | Sand cleaning device for injection well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201717524U CN201254980Y (en) | 2008-09-18 | 2008-09-18 | Sand cleaning device for injection well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201254980Y true CN201254980Y (en) | 2009-06-10 |
Family
ID=40738297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201717524U Expired - Fee Related CN201254980Y (en) | 2008-09-18 | 2008-09-18 | Sand cleaning device for injection well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201254980Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105569589A (en) * | 2016-03-10 | 2016-05-11 | 东营市海天石油科技有限责任公司 | Follow-up sand-pump device |
-
2008
- 2008-09-18 CN CNU2008201717524U patent/CN201254980Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105569589A (en) * | 2016-03-10 | 2016-05-11 | 东营市海天石油科技有限责任公司 | Follow-up sand-pump device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090610 Termination date: 20091019 |