CN2723674Y - Anti-sand blocking sand pipe string for water injection well - Google Patents
Anti-sand blocking sand pipe string for water injection well Download PDFInfo
- Publication number
- CN2723674Y CN2723674Y CN 200420053617 CN200420053617U CN2723674Y CN 2723674 Y CN2723674 Y CN 2723674Y CN 200420053617 CN200420053617 CN 200420053617 CN 200420053617 U CN200420053617 U CN 200420053617U CN 2723674 Y CN2723674 Y CN 2723674Y
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- China
- Prior art keywords
- sand
- water injection
- injection well
- bowl
- block
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- Expired - Fee Related
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Abstract
The utility model discloses a sand proof tubular pole for water injection wells, which is used in petroleum industry and is applicable to the mechanical sand proof technology for various water injection wells. The utility model is provided with a water distributor, sand proof pipes and flushing packers. The flushing packers are arranged in an oil sleeve ring among water injection layers and between an oil pipe and a sleeve, the water injection layers are correspondingly provided with the sand proof pipes to form the sand proof tubular pole for water injection under well, and a sand fender apparatus is installed on the sand proof tubular pole for water injection under well. The utility model has the advantages of reasonable structure and obvious effect of fending sand, and can solve the problem of easy plugging of washing well passages existing in the existing sand proof tubular pole for water injection wells to make the washing well passages be expediting and guarantee the normal proceeding of production.
Description
Technical field
The utility model relates to the underground water-injection tubing string of petroleum industry, and water injection well sand control sand block tubing string particularly is applicable to the mechanical sand control technology of various water injection wells.
Technical background
Domestic each elephant has all entered development late stage at present, and loose sand oil accumulation drops into waterflooding extraction in succession, and the problem of shaking out becomes the key factor of this type of effect of reservoir development of restriction.The sand production petroleum reservoir water injection well mainly adopts chemical sand control and mechanical sand control at present.The water injection well mechanical sand control since the sand control life long, less investment and more and more cause on-the-spot attention.Mechanical sand control mode commonly used at present adopts the anti-sandpipe of metal felt to carry out mostly, because this technology can prevent effectively that formation sand production from entering tubing string, thereby has obtained bigger application at the scene.Because injection water quality, domestic water injection well will carry out clean-out service usually with the removing formation blockage, so the general design of the compression packer of The field has the well-flushing passage.When the anti-sandpipe of applied metal felt carries out sand control in tubing string, occur formation sand production sand easily and bury the packer well-washing passage, cause normally well-flushing; Simultaneously, this mode of merely using anti-sandpipe to carry out sand control also easily makes sand sink in the shaft bottom, causes sand pipe laying post, can cause water injection string backwash passage to stop up equally.
Summary of the invention
The purpose of this utility model provides water injection well sand control sand block tubing string, solves present water injection well tubing string sand control and has the susceptible to plugging problem of well-flushing passage, makes the well-flushing passage unimpeded, guarantees normally carrying out of production.
Use the present technique solution can reach above-mentioned purpose: water injection well sand control sand block tubing string has injection well downhole flow regulator, anti-sandpipe and washing well packer.In the oil jacket annular space between the water filling layer, between oil pipe and sleeve pipe the washing well packer is set, corresponding water filling layer is provided with anti-sandpipe and constitutes the underground water-injection sand control pipe, on the underground water-injection sand control pipe sand-baffling device is installed.
The utility model compared with prior art has the following advantages and effect:
1, anti-sandpipe of the present utility model adopts double wall annular space structure, can satisfy the requirement of technologies such as water injection well water filling and well-flushing;
2, anti-sandpipe two ends connect upper and lower sand device, form the sand block space of a sealing with it, formation sand production can be blocked in outside the anti-sandpipe in oil reservoir position, and the phenomenon of obstruction of packer well-washing passage and sand pipe laying post can not take place;
3, sand device has designed sand block bowl relieving mechanism, and the sand block bowl is in contraction state when tubing string is gone into the well, and when packer setting, the sand block bowl discharges under hydraulic action, and operation is finished synchronously with packer setting.
4, the utility model is rational in infrastructure, and sand control, sand block effect are remarkable.
Description of drawings
Accompanying drawing is a underground structure schematic diagram of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is done further detailed description: referring to accompanying drawing, water injection well sand control sand block tubing string, comprise injection well downhole flow regulator 1, anti-sandpipe 4 and washing well packer 7, in the oil jacket annular space between the water filling layer, between oil pipe 8 and sleeve pipe 9, washing well packer 7 is set, corresponding water filling layer is provided with anti-sandpipe 4, constitute the underground water-injection sand control pipe, on the underground water-injection sand control pipe, sand-baffling device is installed.Sand-baffling device is made up of last sand device 2 and following sand device 5, and last sand device 2 and following sand device 5 are installed in the two ends of preventing sandpipe 4, and injection well downhole flow regulator 1 links to each other with oil pipe 8 and is arranged on the top of sand device 2.Last sand device 2 and following sand device 5 are provided with sand block bowl 3 and sand block bowl 6, and sand block bowl 3 is relative with the rim of a bowl of 6, and the annular space between sandpipe 4 and the sleeve pipe 9 is prevented in sealing.On the sand block body inner periphery direction of last sand device 2 and following sand device 5, be provided with the water hole; Anti-sandpipe 4, oil pipe 8 form the double wall annular space with upper and lower sand device 2 and 5.Flushing fluid flows to washing well packer 7 by the water hole on the sand block body through this double wall annular space.Last sand device 2 and following sand device 5 are respectively equipped with upper and lower joint and sand block bowl relieving mechanism, and sand block bowl relieving mechanism is connected with 6 with sand block bowl 3.Sand block bowl relieving mechanism has piston and shear pin.For last sand device 2, sand block bowl 3 is contained between the top connection and piston of sand device 2, and shear pin is housed on the piston.When set packer, hydraulic action is cut off shear pin during piston motion on piston, discharges sand block bowl 3; In like manner, the sand block bowl 6 of following sand device 5 is contained in down between the lower contact and piston of sand device 5, and shear pin is housed on the piston.When set packer, hydraulic action is cut off shear pin during piston motion on piston, discharges sand block bowl 6.
When tubing string was gone into the well, the sand block bowl 3 and 6 in the upper and lower sand device 2 and 5 was in contraction state.When setting washing well packer 7, upper and lower sand device 2 and 5 sand block bowl 3 and 6 discharge under the effect of hydraulic coupling, are supported on the tube wall of sleeve pipe 9 on the upper and lower border of oil reservoir.When water filling, inject water and enter from oil pipe 8, after injection well downhole flow regulator 1 enters the oil jacket annular space, enter the double wall annular space of preventing sandpipe 4 by the water hole on the last sand device 2, enter implanted layer through anti-sandpipe 4 then; When oil reservoir is anti-when spuing sand, because the effect of anti-sandpipe 4, sand can not enter water injection string, simultaneously upper and lower sand device 2 and 5 and anti-sandpipe 4 with the sand retaining at the oil reservoir position, prevent that sand from entering in the pit shaft, avoid stopping up the well-flushing passage of washing well packer 7 or cause sand pipe laying post.When needs carry out anti-flushing well, inject flushing fluid from the oil jacket annular space, flushing fluid is entered by the water hole on the last sand device 2, enters the well-flushing passage of washing well packer 7 through the double wall annular space and the water hole on the following sand device 5 of anti-sandpipe 4, return out from oil pipe 8 through the bottom ball seat, reach the purpose of well-flushing.
Claims (6)
1, water injection well sand control sand block tubing string, comprise injection well downhole flow regulator (1), anti-sandpipe (4) and washing well packer (7), in the oil jacket annular space between the water filling layer, between oil pipe (8) and sleeve pipe (9), washing well packer (7) is set, corresponding water filling layer is provided with anti-sandpipe (4) and constitutes the underground water-injection sand control pipe, it is characterized in that on the underground water-injection sand control pipe sand-baffling device being installed.
2, water injection well sand control sand block tubing string according to claim 1 is characterized in that sand-baffling device is made up of last sand device (2) and following sand device (5), is installed in the two ends of anti-sandpipe (4), injection well downhole flow regulator (1) is arranged on the top of lug-latch (2).
3, water injection well sand control sand block tubing string according to claim 2, it is characterized in that sand device (2) and following sand device (5) are provided with sand block bowl (3) and (6), sand block bowl (3) is relative with the rim of a bowl of (6), the annular space between anti-sandpipe (4) of sealing and the sleeve pipe (9).
4, according to claim 2 or 3 described water injection well sand control sand block tubing strings, it is characterized in that on the sand block body of last sand device (2) and following sand device (5), being provided with the water hole; Anti-sandpipe (4), oil pipe (8) form the double wall annular space with upper and lower sand device (2) and (5).
5, according to claim 2 or 3 described water injection well sand control sand block tubing strings, it is characterized in that sand device (2) and following sand device (5) are respectively equipped with upper and lower joint and sand block bowl relieving mechanism, sand block bowl relieving mechanism is connected with (6) with sand block bowl (3).
6, water injection well sand control sand block tubing string according to claim 5 is characterized in that sand block bowl relieving mechanism has piston and shear pin, and shear pin is contained on the piston, and sand block bowl (3) is installed between the top connection and piston of sand device (2); Sand block bowl (6) is installed in down between the lower contact and piston of sand device (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420053617 CN2723674Y (en) | 2004-09-07 | 2004-09-07 | Anti-sand blocking sand pipe string for water injection well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420053617 CN2723674Y (en) | 2004-09-07 | 2004-09-07 | Anti-sand blocking sand pipe string for water injection well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2723674Y true CN2723674Y (en) | 2005-09-07 |
Family
ID=35037303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420053617 Expired - Fee Related CN2723674Y (en) | 2004-09-07 | 2004-09-07 | Anti-sand blocking sand pipe string for water injection well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2723674Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108397166A (en) * | 2018-02-22 | 2018-08-14 | 中国石油天然气股份有限公司 | Sand block umbrella, fracturing string and sand-flushing method |
| CN109184629A (en) * | 2018-08-30 | 2019-01-11 | 中国海洋石油集团有限公司 | A kind of selective sand control seperated layer water injection integral tubular column and its tripping in method |
-
2004
- 2004-09-07 CN CN 200420053617 patent/CN2723674Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108397166A (en) * | 2018-02-22 | 2018-08-14 | 中国石油天然气股份有限公司 | Sand block umbrella, fracturing string and sand-flushing method |
| CN109184629A (en) * | 2018-08-30 | 2019-01-11 | 中国海洋石油集团有限公司 | A kind of selective sand control seperated layer water injection integral tubular column and its tripping in method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |