CN102784728A - Underground two-stage cyclone separator - Google Patents
Underground two-stage cyclone separator Download PDFInfo
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- CN102784728A CN102784728A CN2012102926388A CN201210292638A CN102784728A CN 102784728 A CN102784728 A CN 102784728A CN 2012102926388 A CN2012102926388 A CN 2012102926388A CN 201210292638 A CN201210292638 A CN 201210292638A CN 102784728 A CN102784728 A CN 102784728A
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Abstract
The invention provides an underground two-stage cyclone separator, which comprises an outer pipe, a first-stage cyclone separator, a second-stage cyclone separator and a rich oil flow channel, wherein the outer pipe is provided with a produced fluid inlet; the first-stage cyclone separator is arranged in the outer pipe, and comprises a first pipe wall and a first inner cavity in the first pipe wall; a first inlet, a first rich oil overflow channel and a first rich water drainage channel are formed in the first inner cavity; the second-stage cyclone separator is arranged in the outer pipe, and comprises a second pipe wall and a second inner cavity in the second pipe wall; a second inlet, a second rich oil overflow channel and a second rich water drainage channel are formed in the second inner cavity; the rich oil flow channel is arranged in the outer pipe, and is connected with the first rich oil overflow channel and the second rich oil overflow channel; the first-stage cyclone separator is connected in series with the second-stage cyclone separator; the first inlet is communicated with the produced fluid inlet; and the first rich water drainage channel is connected with the second inlet.
Description
Technical field
The present invention relates to petrochemical industry and environmental protection field, belong to liquid-liquid two treatment technology that is separated, the secondary cyclone separator in particular to a kind of down-hole is used for downhole oil-separated form water.
Background technology
At present, the fast separating process that is used for liquid liquid two phases (is that example describes with profit two mutually) mainly contains cyclonic separation, air supporting choosing, filtration to be separated with film etc.The scope that the air supporting choosing then adapts to the oil concentration variation is little; Filtration can realize the separation of profit two phases preferably, but needs frequent backwash to guarantee the long-term stability operation of equipment for high oil-polluted water; The membrane separation plant cost is higher, requires again comparatively strict to ambient condition.Cyclonic separation has that equipment volume is little, the separative efficiency advantages of higher, is used widely in a lot of industries, but only is used for surface separation.
The separation principle of hydrocyclone is to utilize the density contrast between medium and centrifugalize; Density contrast is big more; The particle diameter of decentralized photo is big more; Separating effect is relatively just good more, has also obtained certain application (Northeast Petroleum University has successively applied for multinomial correlation technique patent, like ZL 98211681.0, ZL 01279933.5 and ZL 01277425.1 etc.) in China as a kind of oily water separating equipment at present.
Oil field underground oil-water isolation technics at present because the separator separates effect, with the restriction of water filling matter quality etc., do not obtain excellent popularization and use.Along with going deep into of oilfield exploitation, the moisture content of extraction liquid progressively increases, and recovered water has not only increased lifting and operating cost greatly, and for bringing very big environmental protection pressure in ground, oil field.
Summary of the invention
The present invention aims to provide a kind of down-hole secondary cyclone separator, to solve the problem of prior art at weak effect aspect downhole oil-separated form water.
For this reason, the present invention proposes a kind of down-hole secondary cyclone separator, and said down-hole secondary cyclone separator comprises: outer tube, said outer tube are provided with the import of output liquid; Be arranged on the first order cyclone separator in the said outer tube; Said first order cyclone separator comprises: first inner chamber in first tube wall and said first tube wall is provided with first inlet, the first rich oil overflow ducts and the first rich water passing away in said first inner chamber; Be arranged on the second level cyclone separator in the said outer tube; Said second level cyclone separator comprises: second inner chamber in second tube wall and said second tube wall is provided with second inlet, the second rich oil overflow ducts and the second rich water passing away in said second inner chamber; The oil rich stream passage is arranged in the said outer tube and connects the said first rich oil overflow ducts and the said second rich oil overflow ducts; Wherein, said first order cyclone separator and said second level cyclone separator are connected in series, and said first inlet is communicated with the import of said output liquid, and the said first rich water passing away is connected with said second inlet.
Further, said outer tube is a straight tube, and said first order cyclone separator is connected with the coaxial head and the tail successively of said second level cyclone separator, and said oil rich stream passage is arranged on outside said first tube wall and said second tube wall.
Further; Be provided with the first spirality eddy flow chamber that is communicated with said first inlet in said first inner chamber; The end in the said first spirality eddy flow chamber is communicated with the said first rich water passing away, and said down-hole secondary cyclone separator also comprises: be connected the collection chamber of the head end of the said first rich oil overflow ducts, said collection chamber is arranged in the said outer tube; The end of the said first rich oil overflow ducts is positioned at the front end in the said first spirality eddy flow chamber, and is positioned at the place, axle center of front end.
Further; Said first order cyclone separator also comprises: be arranged on the guiding base cone in the said first rich water passing away; Said guiding base cone extend in the said first spirality eddy flow chamber; The said conical surface forms the awl point, and the said first rich oil overflow ducts is positioned at the central authorities of said first inner chamber, and said awl point is towards the said first rich oil overflow ducts and be positioned at the central authorities of said first inner chamber.
Further, the bottom of said guiding base cone is arranged on said second inlet, and said awl point is the diameter in 8 to 15 times the said first spirality eddy flow chamber with the spacing of the end of the said first rich oil overflow ducts.
Further, said guiding base cone comprises: the first awl section that is connected and the second awl section, said awl point are positioned on the said second awl section, and the tapering of the said first awl section is less than the tapering of the said second awl section.
Further, said second level cyclone separator is a circular curve transiens bipyramid hydrocyclone.
Further, also be provided with the oil well pump that is communicated with the first rich oil overflow ducts on the said outer tube, said oil well pump is positioned at the head end of the said first rich oil overflow ducts.
Further, also be provided with the collect cavity that is communicated with the second rich water passing away in the said outer tube, and the injection pump that is connected with said collect cavity.
Further, said oil rich stream passage is said passes through seal at interval with the import of output liquid.
Owing to adopted first order cyclone separator and second level cyclone separator two-stage cyclone separator altogether; Output liquid has passed through the two-stage separation energy and has accessed effective processing; Increased oil production; Guarantee that again the rich current in second-stage separator processing back reach the down-hole and annotate index together with well, reached the effect of environmental protection, underground oil-water is separated reaching with well is possible with forming.
And then, have guiding base cone and awl point (being also referred to as thimble) in the first order cyclone separator of the present invention, oil droplet is assembled near thimble, and, shortened oil phase from the distance that overfall flows out along upwards migration of thimble, be beneficial to the further separation of oil-polluted water.
Description of drawings
Fig. 1 is the structural representation according to the down-hole secondary cyclone separator of the embodiment of the invention;
Fig. 2 is the operation principle sketch map according to the first order cyclone separator of the embodiment of the invention.
The drawing reference numeral explanation:
1, outer tube 11, seal 13, output liquid import 15, collection chamber 17, oil rich stream passage
19, seal 2, first order cyclone separator 21, first tube wall 23, first inner chamber
25, guiding base cone 230, first inlet, 231, the first spirality eddy flow chamber 235, the first rich oil overflow ducts
237, the first rich water passing away 251, awl point 253, the conical surface 252, the first awl section, 254, the second awl section
3, the rich water passing away of second level cyclone separator 30, second tube wall 34, second 36, collect cavity
320, second inlet, 321, the second spirality eddy flow chamber 323, the second rich oil overflow ducts
100, down-hole secondary cyclone separator
The specific embodiment
To understand in order technical characterictic of the present invention, purpose and effect being had more clearly, to contrast the description of drawings specific embodiment of the present invention at present.
As shown in Figure 1, comprise according to the down-hole secondary cyclone separator 100 of the embodiment of the invention: outer tube 1, be arranged on the first order cyclone separator 2 in the said outer tube and be arranged on the second level cyclone separator 3 in the said outer tube.Said outer tube 1 is provided with output liquid and advances 13, so that obtain output liquid from the down-hole.Outer tube 1 can link to each other with oil pipe through connector or connecting portion, for example takes the linkage section of oblique thread forms to connect with the down-hole corollary apparatus.
The cyclonic separation principle is to utilize two kinds of immiscible liquid density of medium differences and centrifugalize.Under action of centrifugal force, density is than heavy phase---and water is got rid of to wall; Simultaneously, gently phase---oil is pushed to the center to density.Like this, oil is discharged from the overflow pipe at middle part, and water then to the underflow opening motion, is discharged by underflow opening, thereby realizes cyclonic separation.
Said first order cyclone separator 2 comprises: first inner chamber 23 in first tube wall 21 and said first tube wall is provided with first inlet 230, the first rich oil overflow ducts 235 and the first rich water passing away 237 in said first inner chamber 23.When the first rich oil overflow ducts 235 is first separation (promptly for the first time separate), the passing away of the liquid that oil-containing is many, for example, and can be for having the pipeline in hole, when the first rich water passing away 237 is first separation, the passing away of moisture many liquid.
Said second level cyclone separator 3 comprises: second inner chamber in second tube wall 30 and said second tube wall 30 (not indicating among the figure) is provided with second inlet 320, the second rich oil overflow ducts 323 and the second rich water passing away 34 in said second inner chamber.When the second rich oil overflow ducts 323 was secondary separation, when the passing away of the liquid that oil-containing is many, the second rich water passing away 34 were secondary separation (i.e. separation for the second time), the passing away of moisture liquid how also was through drainage channel final after twice separation.
Oil rich stream passage 17 is arranged in the said outer tube 1 and connects said first rich oil overflow ducts 235 and the said second rich oil overflow ducts 323.The oil that down-hole secondary cyclone separator is separated is the summation from the first rich oil overflow ducts 235 and the said second rich oil overflow ducts 323.Said first order cyclone separator 2 is connected in series with said second level cyclone separator 3; Like this; Can on the basis of first separation, carry out secondary separation, the high efficiency that assurance secondary cyclone separator is handled guarantees that the rich current in second-stage separator processing back reach the down-hole and annotate index together with well.Wherein, said first inlet 230 is communicated with said output liquid import 13, and the said first rich water passing away 237 and said second enters the mouth and 320 is connected.
The one-level cyclone adopts helical flow path formula entrance structure, compares conventional disc type entrance structure and reduces spatial volume, and can sufficient tangential velocity be provided for the cyclone flow that enters the mouth, and guarantees separative efficiency.
Primary cyclone underflow opening structure adopts the outlet of helical flow path formula; Reduce secondary cyclone separator inlet annular space structure when spiral liquid flow being provided for second cyclone; Directly link to each other with the secondary cyclone separator; Shorten the axial dimension of overall separation section, and guaranteed the axiality of down-hole secondary cyclone separator.
Secondary oil rich stream and one-level oil rich stream are all opened radial hole UNICOM oil rich stream passage through the entrance structure place, reduce the use of seal like this, save redundant space.
Further, as shown in Figure 1, said outer tube 1 is a straight tube; Said first order cyclone separator 2 is connected with said second level cyclone separator 3 coaxial head and the tail successively, and usually, said first order cyclone separator 2 is arranged on the upper end of said second level cyclone separator 3; Like this, can reduce the radial dimension of outer tube 1, adapt to the working environment that underground oil-water separates; Said oil rich stream passage 17 is arranged on outside said first tube wall 21 and said second tube wall 30; Be that oil rich stream passage 17 is arranged between said first tube wall 21 and the outer tube 1, and between said second tube wall 30 and the outer tube 1, can utilize the annular space of first tube wall 21, said second tube wall 30 and outer tube like this; Make size of outer tube little; Reduce the addition entry point structure of second cyclone, guaranteed the flow continuity of one-level and secondary, can offer the stable liquid phase of secondary cyclone separator.
Further, as depicted in figs. 1 and 2, be provided with the first spirality eddy flow chamber 231 that is communicated with said first inlet 230 in said first inner chamber 23, the end in the said first spirality eddy flow chamber 231 is communicated with the said first rich water passing away 237.The first spirality eddy flow chamber 231 is in first tube wall 21, helicla flute to be set, and the oil in feasible entering first tube wall 21 and the mixed liquor of water form eddy flow.Preliminary election and current stabilization effect are played in the first spirality eddy flow chamber 231.Because down-hole secondary cyclone separator is arranged on the down-hole, the oil that is used for underground mining separates with the mixed liquor of water, and the working depth of down-hole secondary cyclone separator is apart from ground hundreds of rice even go up km; Like this, the mixed liquor of oil and water that gets into the first spirality eddy flow chamber 231 produces rotation at a high speed under the effect of huge down-hole pressure; Thereby; The present invention need not independent drive unit, and for example motor drives oily mixed liquor with water and is rotated energy-conserving and environment-protective.
As shown in Figure 1; Said down-hole secondary cyclone separator 2 also comprises: the collection chamber 15 that is connected the head end of the said first rich oil overflow ducts; Said collection chamber 15 is arranged in said outer 1 pipe; The end of the said first rich oil overflow ducts 235 (being the lower end among Fig. 1) is positioned at the end in the said first spirality eddy flow chamber 231, for example is positioned at front end, and is positioned at the place, axle center of front end.Like this; The oil of separating the feasible first time (or liquid) is taken away from the upper end; Moisture many liquid of separating gets into the lower end and carries out the separation second time; Oil will pump up during the opposite trend of oil and water was produced with oil recovery in separating for the first time, and water will be annotated with underground purpose and match, and has practiced thrift the energy.
Further; As shown in Figure 1; Said first order cyclone separator 2 also comprises: be arranged on the guiding base cone 25 in the said first rich water passing away 237; Said guiding base cone 25 extend in the said first spirality eddy flow chamber 231; The said conical surface 253 forms awl point 251, and the said first rich oil overflow ducts 235 is positioned at central authorities' (promptly being positioned on the axis of first inner chamber 23) of said first inner chamber 23, and said awl point 251 is towards the said first rich oil overflow ducts 235 and be positioned at central authorities' (promptly being positioned on the axis of first inner chamber 23) of said first inner chamber 23.After the mixed liquor of oil and water got into the first spirality eddy flow chamber 231, all rotations at a high speed in whole first inner chamber 23 even leave other parts that the first spirality eddy flow chamber 231 gets into first inner chamber 23, also can be rotated at a high speed.The oil that a part is separated (or the many liquid of oil-containing) directly gets into the first rich oil overflow ducts 235, and the liquid that does not get into the first rich oil overflow ducts 235 then is advanced into down in the first rich water passing away 237, owing in this process, still continuing cyclonic separation; So also have oil or oil droplet to continue to separate; Through guiding base cone 2, can be so that this part oil or oil droplet move along the conical surface 253, behind the arrival awl point 251; Enter into the first rich oil overflow ducts 235 with the direction consistent with the axis of first inner chamber 23; Like this, can improve the efficient of separating for the first time, reduce the burden of separating for the second time.Therefore, guiding base cone 2 can remedy the deficiency of the first rich oil overflow ducts 235.
At present, existing cyclone inside does not have thimble (awl point), just a conical tube structure that closes up downwards.This structure underflow opening is a pipe, can not form tangential fluid form.The benefit of awl point of the present invention is organically to combine the inlet of bottom delivery port (the first rich water passing away 237) with conventional cyclone.Make two-stage form a unified organic whole.
Further, as shown in Figure 1, the bottom of said guiding base cone 25 is arranged on said second inlet 320, and said awl point 251 is the diameter in 8 to 15 times the said first spirality eddy flow chamber 231 with the spacing d of the end of the said first rich oil overflow ducts 235.Spacing d is too big, and guiding base cone 25 is difficult to oil or oil droplet are delivered in the first rich oil overflow ducts 235, and spacing d is too little, then is unfavorable for boring the oil of bottom branch or the conveying of oil droplet.
Further; As shown in Figure 2, said guiding base cone comprises: the first awl section, the 252 and second awl section 254 that is connected, and said awl point 251 is positioned on the said second awl section 254; The tapering E of the said first awl section is less than the tapering F of the said second awl section; Like this, play the effect of a gathering and break-in, so that oil or oil droplet move towards the first rich oil overflow ducts 235 as early as possible.
As shown in Figure 2; The operation principle of first order cyclone separator 2 is: the upper side of first order cyclone separator 2 is to having first inlet 230; Output liquid enters into first inner chamber 23 from first inlet, 230 side direction; The oil of separating or (liquid that oil-containing is many) flow out from the top of the first rich oil overflow ducts 235; Moisture many liquid first rich water passing aways 237 laterally disposed from the bottom flow out, and first inlet, the 230 and first rich water passing away 237 laterally disposed modes are convenient to form stable separated space in first inner chamber 23.
Further, said second level cyclone separator 3 is a circular curve transiens bipyramid hydrocyclone, and first order cyclone separator 2 is realized not having middle annular space with second level cyclone separator 3 and closely is connected, and has guaranteed very high axiality.Circular curve transiens bipyramid hydrocyclone is for example referring to the patent of ZL01279933.5, and the principle of this separator also is a cyclonic separation, plays the further effect of purification of rich current that the one-level eddy flow is obtained, to reach the discharge index on selected stratum, down-hole.Though the secondary cyclone separator all adopts the cyclonic separation principle, different because of its effect, adopted different structural forms.The internal cone type cyclone separator (first order cyclone separator 2) of branch effect has just been set up the thimble structure of two sections cone angles in inside; Oil droplet is assembled near thimble, and, be beneficial to the further separation of oil-polluted water along upwards migration of thimble; Through first branch, the separation of oil that output liquid is main is come out; Partial separator (second level cyclone separator 3) mainly plays the effect that rich current are further purified; Be that can post-treatment aqueous phase reach with the key of well with the notes index, the circular curve transiens bipyramid hydrocyclone of employing has oil removing separating effect efficiently.Therefore, this cascaded structure has guaranteed whole high efficiency separation effect at two ends.The combined efficiency of these two kinds of cyclone separators is high, and the separating effect of optimized Separation device can module combinations, can be optimized modification according to the middle and high specific well conditions that contains well, has widened its popularizing application prospect.
Further; Also be provided with the oil well pump (not shown) that is communicated with the first rich oil overflow ducts 235 on the said outer tube 1, said oil well pump is positioned at the head end of the said first rich oil overflow ducts 235, for example; Oil well pump is positioned at the top of collection chamber 15; To pump, oil well pump can be the ground driven screw pump, also can be submersible electric pump or submersible screw pump.
Further, also be provided with the collect cavity 36 that is communicated with the second rich water passing away 34 in the said outer tube 1, and the injection pump that is connected with said collect cavity 36, so that water is injected the down-hole.
Further, as shown in Figure 1, said oil rich stream passage 17 said with output liquid import 134 through seal at interval, on top, through seal 11 at interval,, spaced apart through seal 19 in the bottom.Seal 11 for example is a sealing ring with seal 19.
Among the present invention, down-hole secondary cyclone separator 100 forms two-stage tandem with the module combinations form and arranges, is arranged in the down-hole oil production section through sealing device.The underground oil-water mixed liquor flows into through the borehole wall, the circular curve transiens bipyramid hydrocyclone (being second level cyclone separator 3) of internal cone type cyclone separator of the one-level of successively flowing through (being first order cyclone separator 2) and secondary.The annular oil-collecting passage (oil rich stream passage) that oil rich stream (liquid that oil-containing is many) forms between the separator and the borehole wall is pumped to ground by oil extraction pump, and rich current (moisture many liquid) reach the discharge index of down-hole formation, directly with in the middle of well injection formation at target locations together.
With other water treatment technologies and apparatus in comparison; Down-hole secondary cyclone separator 100 structures are compact more, and two kinds of monomer cyclonic separation structures that the present invention relates to have realized the high efficiency separation effect under the minor diameter because of its spiral inlet form and circular curve transiens bipyramid hydrocyclone structure respectively; The no any driver part of equipment itself utilizes natural force fully, is beneficial in the down-hole and uses.
The above is merely the schematic specific embodiment of the present invention, is not in order to limit scope of the present invention.For each part of the present invention can make up under the condition of not conflicting each other, any those skilled in the art, equivalent variations of under the prerequisite that does not break away from design of the present invention and principle, having done and modification all should belong to the scope that the present invention protects.
Claims (10)
1. a down-hole secondary cyclone separator is characterized in that, said down-hole secondary cyclone separator comprises:
Outer tube, said outer tube are provided with the import of output liquid;
Be arranged on the first order cyclone separator in the said outer tube; Said first order cyclone separator comprises: first inner chamber in first tube wall and said first tube wall is provided with first inlet, the first rich oil overflow ducts and the first rich water passing away in said first inner chamber;
Be arranged on the second level cyclone separator in the said outer tube; Said second level cyclone separator comprises: second inner chamber in second tube wall and said second tube wall is provided with second inlet, the second rich oil overflow ducts and the second rich water passing away in said second inner chamber;
The oil rich stream passage is arranged in the said outer tube and connects the said first rich oil overflow ducts and the said second rich oil overflow ducts;
Wherein, said first order cyclone separator and said second level cyclone separator are connected in series, and said first inlet is communicated with the import of said output liquid, and the said first rich water passing away is connected with said second inlet.
2. down-hole as claimed in claim 1 secondary cyclone separator; It is characterized in that; Said outer tube is a straight tube, and said first order cyclone separator is connected with the coaxial head and the tail successively of said second level cyclone separator, and said oil rich stream passage is arranged on outside said first tube wall and said second tube wall.
3. down-hole as claimed in claim 1 secondary cyclone separator; It is characterized in that; Be provided with the first spirality eddy flow chamber that is communicated with said first inlet in said first inner chamber; The end in the said first spirality eddy flow chamber is communicated with the said first rich water passing away, and said down-hole secondary cyclone separator also comprises: be connected the collection chamber of the head end of the said first rich oil overflow ducts, said collection chamber is arranged in the said outer tube; The end of the said first rich oil overflow ducts is positioned at the front end in the said first spirality eddy flow chamber, and is positioned at the place, axle center of front end.
4. like each described down-hole secondary cyclone separator in the claim 1 to 3; It is characterized in that; Said first order cyclone separator also comprises: be arranged on the guiding base cone in the said first rich water passing away, said guiding base cone extend in the said first spirality eddy flow chamber, and the conical surface of said guiding base cone forms the awl point; The said first rich oil overflow ducts is positioned at the central authorities of said first inner chamber, and said awl point is towards the said first rich oil overflow ducts and be positioned at the central authorities of said first inner chamber.
5. down-hole as claimed in claim 4 secondary cyclone separator; It is characterized in that; The bottom of said guiding base cone is arranged on said second inlet, and said awl point is the diameter in 8 to 15 times the said first spirality eddy flow chamber with the spacing of the end of the said first rich oil overflow ducts.
6. down-hole as claimed in claim 4 secondary cyclone separator; It is characterized in that; Said guiding base cone comprises: the first awl section that is connected and the second awl section, said awl point are positioned on the said second awl section, and the tapering of the said first awl section is less than the tapering of the said second awl section.
7. down-hole as claimed in claim 1 secondary cyclone separator is characterized in that, said second level cyclone separator is a circular curve transiens bipyramid hydrocyclone.
8. down-hole as claimed in claim 1 secondary cyclone separator is characterized in that, also is provided with the oil well pump that is communicated with the first rich oil overflow ducts on the said outer tube, and said oil well pump is positioned at the head end of the said first rich oil overflow ducts.
9. down-hole as claimed in claim 1 secondary cyclone separator is characterized in that, also is provided with the collect cavity that is communicated with the second rich water passing away in the said outer tube, and the injection pump that is connected with said collect cavity.
10. down-hole as claimed in claim 1 secondary cyclone separator is characterized in that, said oil rich stream passage is said to pass through seal at interval with the import of output liquid.
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