CN107120105A - A kind of downhole rotational-flow desander - Google Patents
A kind of downhole rotational-flow desander Download PDFInfo
- Publication number
- CN107120105A CN107120105A CN201710513754.0A CN201710513754A CN107120105A CN 107120105 A CN107120105 A CN 107120105A CN 201710513754 A CN201710513754 A CN 201710513754A CN 107120105 A CN107120105 A CN 107120105A
- Authority
- CN
- China
- Prior art keywords
- inner tube
- silt
- screen pack
- tube
- net
- 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.)
- Pending
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
- E21B43/38—Arrangements for separating materials produced by the well in the well
Abstract
The present invention discloses a kind of its structure of downhole rotational-flow desander and is divided into inside and outside two pipes, the outer tube is provided with fuel feed hole, said inner tube outer wall carries helical-blade, inner tube bottom necking is inlet port, screen pack is provided between said inner tube and outer tube, the larger silt of particle is in outside during due to eddy flow, therefore the outer ring of screen pack is gross porosity footpath net, and screen pack inner ring is fine pore net.The beneficial effects of the invention are as follows：Silt and oil can be efficiently separated, filter screen is set between inner and outer pipes, prevented from sucking silt during oil pumping and cause holddown phenomenon.
Description
Technical field
The invention belongs to oil-well drilling equipment field, and in particular to a kind of downhole rotational-flow desander.
Background technology
During oil exploitation, formation sand production is to cause the one of the main reasons of holddown, solves the main of problems
Method is typically that hydrocyclone is installed on oil well pipe, and centrifugal force heavier mud is produced when the cardinal principle of the device is eddy flow
Sand is thrown to outer layer, and lighter oil slurry stays in internal layer, so that silt and oil slurry be separated.Common downhole rotational-flow is removed
The silt of outer layer can cause in oil pumping because neutrality slides into desander bottom but is not separated with oil slurry during sand device eddy flow,
The suction of some silts is still had, holddown phenomenon is caused.
The content of the invention
In order to solve the problem of prior art is present, the present invention provides a kind of downhole rotational-flow desander, and its structure is divided into interior
Outer two pipe, the outer tube is provided with fuel feed hole, and said inner tube outer wall carries helical-blade, and inner tube bottom necking is inlet port, institute
State and screen pack is provided between inner and outer tubes, the larger silt of particle is in outside, therefore the outer ring of screen pack during due to eddy flow
Gross porosity footpath net, screen pack inner ring is fine pore net.
The beneficial effects of the invention are as follows：Silt and oil can be efficiently separated, filter screen is set between inner and outer pipes, prevent from taking out
Silt suction is caused into holddown phenomenon when oily.
Brief description of the drawings
A kind of downhole rotational-flow desander structural representations of Fig. 1；
Fig. 2 filter screen schematic diagrames.
Embodiment
For the ease of it will be appreciated by those skilled in the art that being elaborated below in conjunction with the accompanying drawings to the present invention.
A kind of downhole rotational-flow desander as shown in Figure 1 specifically includes outer tube 1, inner tube 2, filter screen 3.The outer tube be provided with into
Oilhole 1-1, said inner tube outer wall is provided with helical-blade 2-1, and inner tube bottom is undergauge inlet port 2-2, as shown in Fig. 2 the filter screen
Outer ring for gross porosity footpath net 3-1, screen pack inner ring be fine pore net 3-2.During eddy flow, the larger silt of particle is attached to outer in outer layer
On inside pipe wall, the less silt of particle is in centre, and oil is then attached to outer wall of inner tube rotation, and screen pack different pore size can be obstructed not
With the silt of particle diameter, preferable sand liquid separating effect is reached.
Claims (1)
1. a kind of downhole rotational-flow desander, it is characterised in that specifically include outer tube, inner tube, filter screen；The outer tube is provided with oil-feed
Hole, said inner tube outer wall is provided with helical-blade, and inner tube bottom is undergauge inlet port, and the outer ring of the filter screen is gross porosity footpath net, filtering
Net inner ring is fine pore net.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710513754.0A CN107120105A (en) | 2017-06-29 | 2017-06-29 | A kind of downhole rotational-flow desander |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710513754.0A CN107120105A (en) | 2017-06-29 | 2017-06-29 | A kind of downhole rotational-flow desander |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107120105A true CN107120105A (en) | 2017-09-01 |
Family
ID=59719131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710513754.0A Pending CN107120105A (en) | 2017-06-29 | 2017-06-29 | A kind of downhole rotational-flow desander |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107120105A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826613A (en) * | 2019-04-09 | 2019-05-31 | 河南省科学院高新技术研究中心 | A kind of oil extraction in oil field filter device |
| CN111927426A (en) * | 2020-09-04 | 2020-11-13 | 北京化工大学 | Sand removal process for underground local reverse circulation and multistage sand setting |
| WO2022222333A1 (en) * | 2021-04-19 | 2022-10-27 | 华东理工大学 | Sorting and separating device and method for natural gas hydrate underground cyclone |
| CN115370345A (en) * | 2022-10-25 | 2022-11-22 | 四川凌耘建科技有限公司 | Automatic shale gas sand discharging device and method |
-
2017
- 2017-06-29 CN CN201710513754.0A patent/CN107120105A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826613A (en) * | 2019-04-09 | 2019-05-31 | 河南省科学院高新技术研究中心 | A kind of oil extraction in oil field filter device |
| CN111927426A (en) * | 2020-09-04 | 2020-11-13 | 北京化工大学 | Sand removal process for underground local reverse circulation and multistage sand setting |
| WO2022222333A1 (en) * | 2021-04-19 | 2022-10-27 | 华东理工大学 | Sorting and separating device and method for natural gas hydrate underground cyclone |
| CN115370345A (en) * | 2022-10-25 | 2022-11-22 | 四川凌耘建科技有限公司 | Automatic shale gas sand discharging device and method |
| CN115370345B (en) * | 2022-10-25 | 2023-01-10 | 四川凌耘建科技有限公司 | Automatic shale gas sand discharging device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170901 |
|
| WD01 | Invention patent application deemed withdrawn after publication |