CN202832384U - Single-flow sand-proof blanking plug for water injection well - Google Patents
Single-flow sand-proof blanking plug for water injection well Download PDFInfo
- Publication number
- CN202832384U CN202832384U CN 201220476833 CN201220476833U CN202832384U CN 202832384 U CN202832384 U CN 202832384U CN 201220476833 CN201220476833 CN 201220476833 CN 201220476833 U CN201220476833 U CN 201220476833U CN 202832384 U CN202832384 U CN 202832384U
- Authority
- CN
- China
- Prior art keywords
- blanking plug
- plug body
- water injection
- injection well
- filter mantle
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 238000002347 injection Methods 0.000 title claims abstract description 26
- 239000007924 injection Substances 0.000 title claims abstract description 26
- 239000004576 sand Substances 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000008398 formation water Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 230000005484 gravity Effects 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract 2
- 230000002265 prevention Effects 0.000 abstract 2
- 239000013049 sediment Substances 0.000 abstract 1
- 230000010355 oscillation Effects 0.000 description 3
- 238000002955 isolation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Abstract
A single-flow sand-prevention plugging device for a water injection well is applied to layered water injection of oil and gas fields. Is characterized in that: the upper end of the blanking plug body is provided with internal threads, the wall of the blanking plug body is provided with an axial rectangular hole, and the wall of the blanking plug body is provided with sealing rings respectively arranged at the upper part and the lower part of the axial rectangular hole. A sealing ball seat is arranged in a central hole of the blanking plug body, and the sealing ball seat is axially arranged at the lower part of the rectangular hole; a valve ball is arranged on the sealing ball seat; the lower end of the blanking plug body is provided with external threads, and the lower end of the blanking plug body is connected with a filter cover in a threaded manner; the filter mantle is cylindrical, the bottom of the filter mantle is closed, and the wall of the filter mantle is provided with a linear cutting elongated hole with the width of 0.1-2.5 mm. The effect is as follows: when the formation pressure is greater than the pressure in the oil pipe, the valve ball of the blanking plug is sealed on the sealing seat by gravity, so that the pressure of the formation system is isolated from the internal pressure of the oil pipe, the backflow of formation water and sediment is prevented, and the aims of sand prevention and blockage prevention are fulfilled.
Description
Technical field
The utility model relates to the oil-gas field development technical field, and particularly the down-hole special tool of oil well delamination water filling is a kind of water injection well single current sand control plugging device.
Background technology
At present, in the oil field well the injecting process, because pressure oscillation or stop water filling can causing the pressure drop in injection pipe network, the tubing string, the silt particle that the injected water that injects the stratum will carry the stratum returns to tell and is back to oil pipe inside.Will cause like this in some slits of injection well downhole flow regulator, blanking plug and oil pipe and deposit silt, the sand card of the device that results in blockage.Consequence is: affect the efficient of dropping-fishing test, the sand that can cause tubing string when serious buries and is forced to carry out the well workover construction.
The utility model content
The purpose of this utility model is: a kind of water injection well single current sand control plugging device is provided, and when the pressure in the tubing string during less than strata pressure, can autoshutdown, upper formation water returns tells the return flow line.
The technical solution adopted in the utility model is: water injection well single current sand control plugging device comprises pulling locking head, blanking plug body, all Lovell balls and filter mantle.The lower end of pulling locking head is threaded in the upper end of blanking plug body, it is characterized in that: described blanking plug body is tubular, there is internal thread upper end at the blanking plug body, axial slot is arranged on the wall of blanking plug body, have and in the axial upper and lower of slot sealing ring is arranged respectively at the wall of blanking plug body.The sealed ball seat of a taper seat shape is arranged in blanking plug body centre bore, and the position axis of sealed ball seat is to the bottom of slot; At sealed ball seat all Lovell ball is arranged; There is external screw thread the lower end of blanking plug body, and screw thread is connected with filter mantle in the lower end of blanking plug body; Filter mantle is cylindrical base sealing, and at the wall of filter mantle width being arranged is the line cutting strip hole of 0.1～2.5mm.
For reducing pressure by regulating flow, screw thread is fixed with a water injection well choke on the inwall of the lower end of blanking plug body, and the centre bore of water injection well choke is between 6～12mm.
The material of above-mentioned all Lovell balls 3 is a kind of in pottery or the carbide alloy.
The operating principle of summary water injection well single current sand control plugging device.During normal water filling work, the pressure in the oil pipe is greater than strata pressure, water filling in the stratum, and the water in the oil pipe is washed all Lovell balls open after through the water injection well choke throttling by filter mantle, and the delivery port between two sealing rings on the process blanking plug body wall enters the stratum.
In pressure oscillation or stop annotating when causing strata pressure greater than the pressure in the oil pipe, all Lovell balls of blanking plug gravity with return tell pressure reduction the effect lower seal on the conical sealing seat of blanking plug body endoporus lower end, stratum system pressure and the isolation of oil pipe internal pressure, stoped formation water and silt return and tell backflow, reached the purpose of sand control anti-sticking.
The beneficial effects of the utility model: the utility model water injection well single current sand control plugging device, in pressure oscillation or stop annotating when causing strata pressure greater than the pressure in the oil pipe, all Lovell balls of blanking plug gravity with return tell pressure reduction the effect lower seal on the conical sealing seat of blanking plug body endoporus lower end, stratum system pressure and the isolation of oil pipe internal pressure, stoped formation water and silt return and tell backflow, reached the purpose of sand control anti-sticking.
Description of drawings
Fig. 1 is the utility model water injection well single current sand control plugging device structural profile schematic diagram.
Among the figure, 1-pulling locking head, 2-blanking plug body, all Lovell balls of 3-, 4-water injection well choke, 5-filter mantle, 6-sealing ring.
The specific embodiment
Embodiment 1: take a water injection well single current sand control plugging device as example, the utility model is described in further detail.
Consult Fig. 1.The utility model water injection well single current sand control plugging device comprises pulling locking head 1, blanking plug body 2, all Lovell balls 3, water injection well choke 4 and filter mantle 5.The lower end of pulling locking head 1 is threaded in the upper end of blanking plug body 2.Described blanking plug body 2 is tubular, there is internal thread upper end at blanking plug body 2, axial slot is arranged on the wall of blanking plug body 2, have and be respectively arranged with twice O RunddichtringO 6 in the axial upper and lower of slot at the wall of blanking plug body 2.It is the taper seat shape sealed ball seat of 90 degree that a tapering is arranged in blanking plug body 2 centre bores, and the position axis of sealed ball seat is to the bottom of slot; At sealed ball seat a diameter being arranged is all Lovell balls 3 of 38mm, and the material of making all Lovell balls 3 is pottery.There is external screw thread the lower end of blanking plug body 2, and screw thread is connected with filter mantle 5 in the lower end of blanking plug body 2; Filter mantle 5 is the cylindrical base sealing, is evenly distributed with the line cutting strip hole that width is 0.15mm at the wall of filter mantle 5.
Screw thread is fixed with a water injection well choke 4 on the inwall of the lower end of blanking plug body 2, and the centre bore of water injection well choke 4 is 8mm.
Claims (3)
1. a water injection well single current sand control plugging device comprises pulling locking head (1), blanking plug body (2), all Lovell balls (3) and filter mantle (5); The lower end of pulling locking head (1) is threaded in the upper end of blanking plug body (2), it is characterized in that: described blanking plug body (2) is tubular, there is internal thread upper end at blanking plug body (2), on the wall of blanking plug body (2) axial slot is arranged, have and in the axial upper and lower of slot sealing ring (6) is arranged respectively at the wall of blanking plug body (2); The sealed ball seat of a taper seat shape is arranged in blanking plug body (2) centre bore, and the position axis of sealed ball seat is to the bottom of slot; At sealed ball seat all Lovell ball (3) is arranged; There is external screw thread the lower end of blanking plug body (2), is connected with filter mantle (5) at the lower end screw thread of blanking plug body (2); Filter mantle (5) is the cylindrical base sealing, and at the wall of filter mantle (5) width being arranged is the line cutting strip hole of 0.1～2.5mm.
2. water injection well single current sand control plugging device according to claim 1, it is characterized in that: screw thread is fixed with a water injection well choke (4) on the lower end inwall of blanking plug body (2), and the centre bore of water injection well choke (4) is between 6～12mm.
3. water injection well single current sand control plugging device according to claim 1 is characterized in that: the material of above-mentioned all Lovell balls (3) is a kind of in pottery or the carbide alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220476833 CN202832384U (en) | 2012-09-18 | 2012-09-18 | Single-flow sand-proof blanking plug for water injection well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220476833 CN202832384U (en) | 2012-09-18 | 2012-09-18 | Single-flow sand-proof blanking plug for water injection well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202832384U true CN202832384U (en) | 2013-03-27 |
Family
ID=47944116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220476833 Expired - Fee Related CN202832384U (en) | 2012-09-18 | 2012-09-18 | Single-flow sand-proof blanking plug for water injection well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202832384U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047572A (en) * | 2014-05-29 | 2014-09-17 | 克拉玛依胜利高原机械有限公司 | Oil pipe blockage control device |
| CN105443074A (en) * | 2014-08-29 | 2016-03-30 | 中国石油天然气股份有限公司 | Check valve |
-
2012
- 2012-09-18 CN CN 201220476833 patent/CN202832384U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047572A (en) * | 2014-05-29 | 2014-09-17 | 克拉玛依胜利高原机械有限公司 | Oil pipe blockage control device |
| CN105443074A (en) * | 2014-08-29 | 2016-03-30 | 中国石油天然气股份有限公司 | Check valve |
| CN105443074B (en) * | 2014-08-29 | 2018-04-03 | 中国石油天然气股份有限公司 | Check valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20210918 |