CN1078292A - A kind of downhole separation system - Google Patents
A kind of downhole separation system Download PDFInfo
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- CN1078292A CN1078292A CN 92103065 CN92103065A CN1078292A CN 1078292 A CN1078292 A CN 1078292A CN 92103065 CN92103065 CN 92103065 CN 92103065 A CN92103065 A CN 92103065A CN 1078292 A CN1078292 A CN 1078292A
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- annular chamber
- oil
- housing
- rotor
- mixed liquor
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Abstract
A kind of downhole separation system is particularly suitable for using in high-water-cut oil-producing well.It has housing etc., it is characterized in that: the annular chamber rotor is arranged in housing, and its inner surface has sieve aperture, and outer rim has and the obturaging of housing seal at an upper portion thereof, be connected to submersible motor in the lower end, have outside housing and between the borehole wall and isolate stifled ring, the vane sheet has been arranged on annular chamber top.Use annular chamber to drive the method for mixed liquor rotation in it, under action of centrifugal force, accelerate the sedimentation separation of oil, water in the mixed liquor.Oil after the separation is taken away the sieve aperture in annular chamber.Make oil pumping machinery only need to extract oil, save a large amount of extracting energy, improve capacity usage ratio.
Description
A kind of downhole separation system, it belongs to oil exploration equipment, can be used for being specially adapted to high-water-cut oil-producing well in the various oil pumping oil wells.
In present oil well, major part be can not blowing oil well.For these can not blowing oil well, must use the method that extracts that oil is extracted up.Because the oil well that has belongs to high-water-cut oil-producing well, in the mixed liquor that extracts from well, contains a large amount of moisture content, the water content that has can be up to 80%～90%.For such oil mining, all be to adopt to be drawn into abovegroundly contain water mixed liquid now, use special-purpose oil water separator that oil is separated with moisture content then.Owing in the mixed liquor that extracts, contain certain moisture content, thereby the energy that extraction is consumed not is to be used to extract oil fully.Particularly when the water content in the mixed liquor was very high, institute's consumed power major part all was used to extract useless moisture content.When moisture content surpasses certain value, extract the energy that mixed liquor consumed, will be above isolated oil contained energy, thus be to lose more than gain from energy point of view.
The objective of the invention is to invent a kind of can be at the oil water separator of underground work.It carries out water-oil separating to the oil-water mixture of output on the spot in the down-hole, and the oil composition that oil pumper is only extracted separated reaches the raising capacity usage ratio, the purpose that cuts down the consumption of energy.
Structure of the present invention as shown in Figure 1.It has housing 1, inlet 2, delivery port 3, oil-out 4, it is characterized in that: rotatable annular chamber rotor 5 is arranged in housing 1, on annular chamber rotor 5 inner cylinder, have sieve aperture and have drainage openings in annular chamber rotor 5 outer cylinder bottoms, annular chamber rotor 5 top outer rims have with housing 1 rotatory sealing obturage 6, delivery port is in annular chamber rotor 5 bottoms, be connected to submersible motor 7 in annular chamber rotor 5 lower ends, between housing 1 outside and the borehole wall, have and isolate stifled ring 8, vane sheet 9 has been arranged on the annular chamber top of annular chamber rotor 5.
Accompanying drawing 1 is a structure cross-sectional schematic of the present invention.
Operating principle of the present invention is as follows:
In use, producing horizon bottom under the producing well is put in invention, make the stifled ring 8 of isolation between the hull outside and the borehole wall in the borehole wall the oil reservoir section of oozing out and below the separation of water filling section.After submersible motor 7 energisings, 5 rotations of annular chamber rotor.The oil that oozes out from oil reservoir and the mixed liquor of water enter housing 1 internal upper part by inlet 2, and enter the annular chamber top of annular chamber rotor 5.Rotate for 9 times playing the vane sheet.Like this, the mixed liquor that enters into annular chamber all with the 5 the same rotations of annular chamber rotor.Because oil is different with the proportion of water in the oil-water mixture, according to stoke mixed liquor separate and subside formula, moisture content and oil will separate in radially (centrifugal force direction) under action of centrifugal force, and centrifugal force is big more, and the required separation time of staying is just short more.Owing to have sieve aperture on annular chamber rotor 5 inner cylinder, the oil after the separation is extracted from the inner cylinder sieve aperture.And isolated moisture content flows out from the basifacial hole of column jacket and be input in the aquifer under the oil reservoir by delivery port 3.
The present invention uses the inner cylinder in the rotation of oil well bottom to have the annular chamber rotor of sieve aperture to drive the mixed liquor rotation, under action of centrifugal force, the mixed liquor of different oil of proportion and water is separated, the oil that proportion is little is gone out to get by oil-out, heavy moisture content is re-entered in the aquifer under the oil reservoir, has realized the purpose that separate the mixed liquor down-hole.Oil rig only need extract the oil that has separated, thereby can reduce and extract oil energy consumption, particularly for high-water-cut oil-producing well, because moisture content accounts for the overwhelming majority of mixed liquor, thereby can cut down the consumption of energy greatly, improves capacity usage ratio.
In the present invention, submersible motor 7 can use the motor that uses in the electric submersible pump, and electric submersible pump uses in the exploitation of oil well a lot, as the ASK series of electrical machinery general factory, Tianjin.For adapting to the job requirement of different oil well different moisture contents, also can use the total control electric drive system that can regulate its work operating mode, as number of patent application CN92100001 " a kind of fully numerical-controlled electric towing ".
In the present invention, vane sheet 9 has been arranged at the annular chamber top of annular chamber rotor 5.Playing vane sheet 9 is to make the mixed liquor rotation that enters annular chamber, with the rotor basic synchronization.Rotor had only the axial flow and the radial separation motion of low speed in the blended liquid phase of annular chamber inside.Its blade face shape can be used the design of centrifugal pump impeller.
In the present invention, the supporting construction of rotor can use the bearing of water lubrication with reference to the design of electric submersible pump, also can use sliding bearing, can also use existing electric submersible pump repacking.When using existing electric submersible pump to reequip, remove the wormwheel blade in the electric submersible pump, change the annular chamber rotor of band sieve aperture into, and use housing, motor and the supporting system of former electric submersible pump.Obturaging between rotor 5 and the housing 6 can be to obturage in many gaps, utilizes clearance seal, prevents to import mixing again of mixed liquor and isolated moisture.The stifled ring 8 of isolation between housing 1 outside and the borehole wall also plays same purpose.But when work, do not have relative motion owing to isolate stifled ring 8, thereby can use contact seal, as elastic ring, rubber ring etc.
Claims (1)
1, a kind of downhole separation system, it has housing 1, inlet 2, delivery port 3, oil-out 4, it is characterized in that: rotatable annular chamber rotor 5 is arranged in housing 1, on annular chamber rotor 5 inner cylinder, have sieve aperture and have drainage openings in annular chamber rotor 5 outer cylinder bottoms, annular chamber rotor 5 top outer rims have with housing 1 rotatory sealing obturage 6, delivery port is in annular chamber rotor 5 bottoms, be connected to submersible motor 7 in annular chamber rotor 5 lower ends, between housing 1 outside and the borehole wall, have and isolate stifled ring 8, vane sheet 9 has been arranged on the annular chamber top of annular chamber rotor 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92103065 CN1036482C (en) | 1992-04-29 | 1992-04-29 | Equipment for separating oil from water in the well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92103065 CN1036482C (en) | 1992-04-29 | 1992-04-29 | Equipment for separating oil from water in the well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1078292A true CN1078292A (en) | 1993-11-10 |
| CN1036482C CN1036482C (en) | 1997-11-19 |
Family
ID=4940010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92103065 Expired - Fee Related CN1036482C (en) | 1992-04-29 | 1992-04-29 | Equipment for separating oil from water in the well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1036482C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121371A (en) * | 2010-12-26 | 2011-07-13 | 于华飞 | Underground solid-liquid and oil-water separating device for reciprocating producing well |
| WO2013016952A1 (en) * | 2011-08-02 | 2013-02-07 | 中国科学院力学研究所 | Tubular oil-water separator and spiral flow generator therefor |
| CN103052854A (en) * | 2010-09-30 | 2013-04-17 | 三菱重工业株式会社 | Oil separation means and freezer equipped therewith |
| CN110173254A (en) * | 2019-05-14 | 2019-08-27 | 中国海洋石油集团有限公司 | A kind of underground bitubular single-stage adjustable type gas-liquid separator |
| CN110939426A (en) * | 2019-11-19 | 2020-03-31 | 东北石油大学 | Centrifugal separation mechanism and co-well injection and production device using same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4241787A (en) * | 1979-07-06 | 1980-12-30 | Price Ernest H | Downhole separator for wells |
| US4296810A (en) * | 1980-08-01 | 1981-10-27 | Price Ernest H | Method of producing oil from a formation fluid containing both oil and water |
-
1992
- 1992-04-29 CN CN 92103065 patent/CN1036482C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103052854A (en) * | 2010-09-30 | 2013-04-17 | 三菱重工业株式会社 | Oil separation means and freezer equipped therewith |
| US9022230B2 (en) | 2010-09-30 | 2015-05-05 | Mitsubishi Heavy Industries, Ltd. | Oil separation means and refrigeration device equipped with the same |
| CN103052854B (en) * | 2010-09-30 | 2016-01-20 | 三菱重工业株式会社 | Oil content separating mechanism and possess the refrigerating plant of this oil content separating mechanism |
| CN102121371A (en) * | 2010-12-26 | 2011-07-13 | 于华飞 | Underground solid-liquid and oil-water separating device for reciprocating producing well |
| WO2013016952A1 (en) * | 2011-08-02 | 2013-02-07 | 中国科学院力学研究所 | Tubular oil-water separator and spiral flow generator therefor |
| US9901936B2 (en) | 2011-08-02 | 2018-02-27 | Institute Of Mechanics, Chinese Academy Of Sciences | Pipeline type oil-water separator and cyclone generator for the same |
| CN110173254A (en) * | 2019-05-14 | 2019-08-27 | 中国海洋石油集团有限公司 | A kind of underground bitubular single-stage adjustable type gas-liquid separator |
| CN110173254B (en) * | 2019-05-14 | 2021-07-27 | 中国海洋石油集团有限公司 | Underground double-cylinder single-stage adjustable gas-liquid separator |
| CN110939426A (en) * | 2019-11-19 | 2020-03-31 | 东北石油大学 | Centrifugal separation mechanism and co-well injection and production device using same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1036482C (en) | 1997-11-19 |
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| CF01 | Termination of patent right due to non-payment of annual fee |