CN203584385U - Double-helical-blade diversion underground cyclone desander - Google Patents
Double-helical-blade diversion underground cyclone desander Download PDFInfo
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- CN203584385U CN203584385U CN201320823091.XU CN201320823091U CN203584385U CN 203584385 U CN203584385 U CN 203584385U CN 201320823091 U CN201320823091 U CN 201320823091U CN 203584385 U CN203584385 U CN 203584385U
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Abstract
The utility model discloses a double-helical-blade diversion underground cyclone desander, mainly aiming to solve the problem that an oil extracting pump tends to be blocked and damaged easily by sand carried in oil well produced fluid before the fluid enters the pump. The double-helical-blade diversion underground cyclone desander is characterized in that a cyclone separating cylinder (2) and a sand setting cylinder (7) are connected in sequence below a pump cylinder joint (1), wherein a plurality of liquid inlet holes (3) are formed in the cylinder wall of the cyclone separating cylinder (2); an overflow pipe (5) is fixed in the cyclone separating cylinder (2); a double-helix liquid guide sheet (4) is fixed to the outer wall of the overflow pipe (5), and is positioned below the liquid inlet holes (3); the upper port of the overflow pipe (5) is hermetically fixed in the inlet cavity of the pump cylinder joint (1), and the lower port of the overflow pipe (5) is connected with an annular sand blocking net (6) in a threaded manner; bottom end of the sand setting cylinder (7) is enclosed through a screwed plug (8); the screwed plug (8) is a neodymium-iron-boron permanent magnet. The underground cyclone desander has a good sand prevention effect, and can be used for performing liquid-solid separation. Long-time use of the oil extracting pump is ensured.
Description
Technical field
The utility model relates to a kind of downhole tool being applied in petroleum gas engineering field.
Background technology
Oil field enters after middle high water-cut stage, and long-term waterflooding extraction causes formation cementation variation, and the application of the pressure break of back-up sand simultaneously, polymer displacement of reservoir oil and ternary composite driving wet goods new technology strengthens Produced Liquid prop-carrying capacity.Although production fluid amount continues to increase, also cause formation sand production amount to rise simultaneously.In oil extraction pump lifting process, due to erosion and the wearing and tearing of sand grains, pump efficiency reduces, and pump detection period shortens, and even often causes the accidents such as sand card and sand plug.In addition, in crude oil transmission process, often occur that pipeline amasss sand plug plug, oil transfer pump pump case is worn out, and valve damages, and the series of problems such as instrument malfunction, seriously affect the normal production of crude oil.For these problems, at present the conventional anti-sand method in oil field is to adopt the sand filtering pipe columns such as slotted liner, wire-wrapped screen are installed below oil extraction pump are stoped reservoir sand to enter pit shaft.Although this method is simple, construction cost is low, and period of validity is short, can only guard against larger sand grains, and easily stops up.
Summary of the invention
In order to solve the technical problem of mentioning in background technology, the utility model provides a kind of double helix sheet flow-guiding type downhole rotational-flow desander, this kind of downhole rotational-flow desander is simple in structure, be easy to be arranged on oil extraction pump lower end, can utilize the eddy flow principle of liquid and the ferromagnetic property of grit the production fluid of oil well to be carried out liquid-solid separation, sand controlling result is good, has guaranteed the long-time use of oil extraction pump.
The technical solution of the utility model is: this kind of double helix sheet flow-guiding type downhole rotational-flow desander, comprise a pump barrel connector being connected with the Pump Suction Nozzle of oil extraction pump, its unique distinction is: below pump barrel connector, be connected with rotational flow separation cylinder and sand-precipitating tube in turn.Wherein, have some inlet openings on the barrel of rotational flow separation cylinder, be fixed with a bleed off pipe in rotational flow separation cylinder, fix double helix drain sheet on the outer wall of bleed off pipe, double helix drain sheet is positioned at the below of inlet opening; In the entrance cavity that is sealingly fastened in pump barrel connector suitable for reading of bleed off pipe, the end opening of bleed off pipe has been threaded connection annular sand grid; The bottom of sand-precipitating tube is sealed by plug, and plug is Nd-Fe-B permanent magnet.
The utlity model has following beneficial effect: this kind of downhole rotational-flow desander is provided with rotational flow separation cylinder and sand-precipitating tube.The effect of rotational flow separation cylinder is: under the pump suction of oil extraction pump, oil well liquid-producing is sucked in cylinder by inlet opening, under the guide functions of double helix drain sheet, produce eddy flow, because solid-liquid two-phase exists density contrast, lighter oil-water mixture moves upward through bleed off pipe, by the center cavity of bleed off pipe, enter oil recovery pump intake, heavier sand facies move downward with outward turning stream, and movement is to sand-precipitating tube.Because most of gravel of down-hole all has ferromagnetism, so, can, adopting under the plug effect of Nd-Fe-B permanent magnet material, be attracted to gradually sand-precipitating tube bottom.This kind of downhole rotational-flow desander is simple in structure, be easy to be arranged on oil extraction pump lower end, can utilize ferromagnetic property that the eddy flow principle of liquid has with grit to carry out the production fluid of oil well liquid-solid separation, have the advantages that sand controlling result is good, can guarantee the long-play of oil extraction pump.
Accompanying drawing explanation:
Fig. 1 is structural representation of the present utility model.
1-pump barrel connector in figure, 2-rotational flow separation cylinder, 3-inlet opening, 4-double helix drain sheet, 5-bleed off pipe, 6-annular sand grid, 7-sand-precipitating tube, 8-plug.
The specific embodiment:
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, this kind of double helix sheet flow-guiding type downhole rotational-flow desander, comprises a pump barrel connector 1 being connected with the Pump Suction Nozzle of oil extraction pump, and its unique distinction is: below pump barrel connector 1, be connected with rotational flow separation cylinder 2 and sand-precipitating tube 7 in turn.Wherein, have some inlet openings 3 on the barrel of rotational flow separation cylinder 2, be fixed with a bleed off pipe 5 in rotational flow separation cylinder 2, fix double helix drain sheet 4 on the outer wall of bleed off pipe 5, double helix drain sheet 4 is positioned at the below of inlet opening 3; In the entrance cavity that is sealingly fastened in pump barrel connector 1 suitable for reading of bleed off pipe 5, the end opening of bleed off pipe 5 has been threaded connection annular sand grid 6; The bottom of sand-precipitating tube 7 is sealed by plug 8, and plug 8 is Nd-Fe-B permanent magnet.
During use, this kind of downhole rotational-flow desander is arranged on to the Pump Suction Nozzle lower end of oil extraction pump.Start after oil extraction pump, under pump suction, oil well liquid-producing is sucked by the inlet opening on rotational flow separation cylinder, under the guide functions of double helix drain sheet, produce eddy flow, because solid-liquid two-phase exists density contrast, lighter oil-water mixture moves upward through bleed off pipe, by the center cavity of bleed off pipe, enters oil recovery pump intake, heavier sand facies move downward with outward turning stream, and movement is to sand-precipitating tube.Because most of gravel of down-hole all has ferromagnetism, so, can, adopting under the plug effect of Nd-Fe-B permanent magnet material, be attracted to gradually sand-precipitating tube bottom.
Claims (1)
1. a double helix sheet flow-guiding type downhole rotational-flow desander, comprise a pump barrel connector (1) being connected with the Pump Suction Nozzle of oil extraction pump, it is characterized in that: in pump barrel connector (1) below, be connected with rotational flow separation cylinder (2) and sand-precipitating tube (7) in turn; Wherein, on the barrel of rotational flow separation cylinder (2), have some inlet openings (3), in rotational flow separation cylinder (2), be fixed with a bleed off pipe (5), on the outer wall of bleed off pipe (5), fix double helix drain sheet (4), double helix drain sheet (4) is positioned at the below of inlet opening (3); In the entrance cavity that is sealingly fastened in pump barrel connector (1) suitable for reading of bleed off pipe (5), the end opening of bleed off pipe (5) has been threaded connection annular sand grid (6); The bottom of sand-precipitating tube (7) is by plug (8) sealing, and plug (8) is Nd-Fe-B permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320823091.XU CN203584385U (en) | 2013-12-13 | 2013-12-13 | Double-helical-blade diversion underground cyclone desander |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320823091.XU CN203584385U (en) | 2013-12-13 | 2013-12-13 | Double-helical-blade diversion underground cyclone desander |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203584385U true CN203584385U (en) | 2014-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320823091.XU Expired - Fee Related CN203584385U (en) | 2013-12-13 | 2013-12-13 | Double-helical-blade diversion underground cyclone desander |
Country Status (1)
| Country | Link |
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| CN (1) | CN203584385U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108868696A (en) * | 2018-05-30 | 2018-11-23 | 中国石油天然气股份有限公司 | Oil production pipe |
| CN112047612A (en) * | 2020-09-30 | 2020-12-08 | 中国石油天然气股份有限公司 | Oil-containing sludge separation device |
| CN112047602A (en) * | 2020-09-30 | 2020-12-08 | 中国石油天然气股份有限公司 | Oily sludge cyclone sedimentation separation device |
-
2013
- 2013-12-13 CN CN201320823091.XU patent/CN203584385U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108868696A (en) * | 2018-05-30 | 2018-11-23 | 中国石油天然气股份有限公司 | Oil production pipe |
| CN112047612A (en) * | 2020-09-30 | 2020-12-08 | 中国石油天然气股份有限公司 | Oil-containing sludge separation device |
| CN112047602A (en) * | 2020-09-30 | 2020-12-08 | 中国石油天然气股份有限公司 | Oily sludge cyclone sedimentation separation device |
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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 |
Granted publication date: 20140507 Termination date: 20151213 |
|
| EXPY | Termination of patent right or utility model |