CN106733243B - Multi-cavity cyclone type crude separation device for underground oil production - Google Patents
Multi-cavity cyclone type crude separation device for underground oil production Download PDFInfo
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- CN106733243B CN106733243B CN201710049547.4A CN201710049547A CN106733243B CN 106733243 B CN106733243 B CN 106733243B CN 201710049547 A CN201710049547 A CN 201710049547A CN 106733243 B CN106733243 B CN 106733243B
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- 238000000926 separation method Methods 0.000 title claims abstract description 63
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 77
- 239000007788 liquid Substances 0.000 claims abstract description 36
- 238000002347 injection Methods 0.000 claims abstract description 18
- 239000007924 injection Substances 0.000 claims abstract description 18
- 239000003129 oil well Substances 0.000 claims description 4
- 238000011084 recovery Methods 0.000 claims description 4
- 238000005192 partition Methods 0.000 claims description 2
- 239000003921 oil Substances 0.000 abstract description 69
- 239000010779 crude oil Substances 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 11
- 239000002699 waste material Substances 0.000 abstract description 3
- 230000000903 blocking effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000005086 pumping Methods 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000003809 water extraction Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/02—Construction of inlets by which the vortex flow is generated, e.g. tangential admission, the fluid flow being forced to follow a downward path by spirally wound bulkheads, or with slightly downwardly-directed tangential admission
- B04C5/04—Tangential inlets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/08—Vortex chamber constructions
- B04C5/081—Shapes or dimensions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/08—Vortex chamber constructions
- B04C5/103—Bodies or members, e.g. bulkheads, guides, in the vortex chamber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/12—Construction of the overflow ducting, e.g. diffusing or spiral exits
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B43/385—Arrangements for separating materials produced by the well in the well by reinjecting the separated materials into an earth formation in the same well
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- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geometry (AREA)
- Cyclones (AREA)
Abstract
The invention discloses a multi-cavity cyclone type rough separation device for underground oil production, which can be used as a part of an underground unit of an electric submersible pump oil production device and solves the problems of poor separation effect and energy and fund waste of the existing separation device. The device can effectively strengthen the separation effect, reduce the water content and improve the volume ratio of crude oil in the lifting liquid. Including a housin, the casing has interior cavity, outer cavity, and interior cavity has last separator, separator down, and the lower separator of interior cavity, outer cavity all are cone type under the circle, and the circle section of outer cavity sets up tangential feed liquor pipe, sets up the tangential outlet pipe between the circle section of separator under the cone section of outer cavity and the interior cavity, and the next door inboard between the separator on outer cavity, the interior cavity sets up tangential oil pipe, the bottom of interior cavity sets up the water injection pipe that is used for the water injection stratum that separates, be equipped with the check valve on tangential outlet pipe, tangential oil pipe, the water injection pipe respectively.
Description
Technical Field
The invention relates to oil exploitation equipment, in particular to an underground oil production multi-cavity cyclone type coarse separation device.
Background
In the process of oil exploitation, the stratum has sufficient energy and can be sprayed by natural energy. As the formation energy is consumed, the formation pressure drops and the period of spontaneous flow ends, requiring the development technician to select additional driving energy. The artificial lifting technology is indispensable in modern oil exploitation and is widely applied. In China, the mode of displacing crude oil in the stratum is mainly water flooding, and most oil fields adopt a water injection mode to extract crude oil. The water injection exploitation cost is low, the oil displacement effect is good, and the comprehensive economic benefit is high. However, as the formation's crude oil is continuously produced, less drive energy is required for the crude oil in the large pores of the formation. For the tiny pores, the pore canal is smaller, the capillary pressure is higher, and the oil displacement resistance is higher, so that a large amount of residual oil in the stratum is difficult to recover.
In many domestic oil fields, the water is injected to displace crude oil into a well hole and then artificial lifting oil extraction is adopted, and the lifting liquid contains a large amount of water, so that the water content is very high, and the condition that the water content is as high as 90% is also very common. The only thing that is needed is that portion of the lower-fraction crude oil that is lifted out of the liquid at the wellhead. Large amounts of water are produced, which results in large electrical energy and capital investments being expended. The cost of water treatment at a later stage is also a major expense for oil production. The water extraction and reinjection process causes a great deal of energy waste and increases the cost. Therefore, it is very important to carry out crude separation of oil and water in the well. The partial function of current oil water separator, for example the utility model patent of patent application number 00213389.X, its separator is comparatively simple, and the crude oil moisture content of separating is higher, and separation efficiency is low.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a multi-cavity cyclone type rough separation device for underground oil production, which can be used as a part of an underground unit of an electric submersible pump oil production device and solves the problems of poor separation effect and waste of energy and funds of the conventional separation device. The device can effectively strengthen the separation effect, reduce the water content and improve the volume ratio of the crude oil in the lifting liquid.
The purpose of the invention is realized as follows:
the utility model provides a thick separator of oil recovery multicavity room spiral-flow type in pit, the casing has interior cavity and encircles and be annular outer cavity outside the cavity, interior cavity has last separation part, lower separation part, outer cavity is located the last separation part of interior cavity, the lower separation part of interior cavity, outer cavity all are cone type under the circle, the top of interior cavity sets up takes out oil pipe and is used for being connected with oil-well pump, the circle section of outer cavity sets up tangential feed liquor pipe and is used for being connected with the inner chamber of booster pump, set up the tangential outlet pipe between the circle section of the cone section of outer cavity and interior cavity lower separation part, the next door inboard between the separation part sets up tangential outlet pipe on outer cavity, the interior cavity, tangential outlet pipe is located the top of tangential outlet pipe, the bottom of interior cavity sets up the water injection pipe that is used for pouring into the stratum with the water that separates, be equipped with the check valve on tangential outlet pipe, the water injection pipe respectively.
In order to form the rotational flow, preferably, the upper end of the tangential liquid inlet pipe is tangent to the outer surface of the booster pump, the lower end of the tangential liquid inlet pipe is tangent to the outer surface of the outer chamber, the upper end of the tangential water outlet pipe is tangent to the outer surface of the outer chamber, and the lower end of the tangential water outlet pipe is tangent to the outer surface of the inner chamber.
In order to improve the separation effect, preferably, the number of the tangential liquid inlet pipes is two, the two tangential liquid inlet pipes are symmetrically arranged on the outer side of the outer cavity along the horizontal direction, and the rotation directions of the two tangential liquid inlet pipes are the same; the number of the tangential water outlet pipes is two, the two tangential water outlet pipes are symmetrically arranged on the outer side of the inner cavity along the horizontal direction, and the rotating directions of the two tangential water outlet pipes are the same; the quantity of tangential oil outlet pipe is two, and two tangential oil outlet pipes set up the inboard at the next door along the horizontal direction symmetry, and the direction of rotation of two tangential oil outlet pipes is the same.
In order to ensure that the oil-water mixed liquid enters the outer cavity chamber along the tangential lines through the tangential liquid inlet pipes at the two sides to perform downward spiral motion and prevent liquid molecules entering the two liquid inlets from colliding to influence the separation effect, preferably, the two tangential liquid inlet pipes are arranged in a staggered manner along the vertical direction; the two tangential water outlet pipes are arranged along the vertical direction in a staggered manner; the two tangential oil outlet pipes are arranged along the vertical direction in a staggered manner.
Preferably, the diameter of the lower separation part of the inner chamber is larger than that of the upper separation part, so that a step is formed between the upper separation part and the lower separation part.
Preferably, an annular baffle is arranged on the inner side of a partition wall between the upper separation parts of the outer chamber and the inner chamber and is positioned above the tangential oil outlet pipe.
Preferably, the tangential oil outlet pipe is positioned below the tangential liquid inlet pipe.
Preferably, the tangential outlet pipe is located at the upper part of the conical section of the outer chamber.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
1. the device is a part of an underground unit of an electric submersible pump oil extraction device, underground oil and water are effectively separated, which is particularly important for oil extraction. The water treatment cost can be obviously reduced, and the method has considerable economic benefit and can play an important role in the lifting technology of non-flowing wells or high-water-content wells.
2. The separation is gradually realized by adopting a multi-cavity top-down combined structure, so that the separation efficiency is obviously improved.
3. Under the action of centrifugal force, when the lower part of the coarse separation device discharges water at a low speed and the tangential liquid inlet pipe feeds liquid at a high speed, the thickness of water along the wall surface of the inner chamber is increased, and the pressure of a water outlet of the lower water injection pipe is increased. The water is blocked by two layers at the upper part, wherein one layer is the blocking of the step between the upper separation part and the lower separation part of the inner chamber, and the other layer is the blocking of the annular baffle of the upper separation part of the inner chamber. Due to the blocking effect, in the cyclone process, the pressure of a water outlet of the lower water injection pipe is further increased, the liquid discharge speed is increased, and the separation efficiency is improved. The oil-water mixing can be effectively prevented, the volume of water pumped out of the separator through the oil pumping communicating pipe on the upper part of the inner cavity is reduced, and the influence of the water channeling effect on the water content of the extracted crude oil is prevented.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the separator;
FIG. 3 isbase:Sub>A schematic sectional view A-A of FIG. 2;
FIG. 4 is a schematic diagram of cyclonic separation.
Reference numerals
In the attached drawing, 1, an oil-submersible cable, 2, an oil inlet pipe, 3, an oil pump, 4, an oil pump inlet, 5, an upper coupling, 6, an oil pumping motor, 7, a lower coupling, 8, a suction valve, 9, a booster pump, 10, an oil pumping pipe, 11, 23, a tangential liquid inlet pipe, 12, 21, a tangential oil outlet pipe, 13, 20, a tangential water outlet pipe, 14, 15, 18, 19, a one-way valve, 16, a water injection pipe, 17, a stratum, 22, an annular baffle, 24, an oil-containing layer, 25, a sleeve, 26, an oil pipe, 27, an upper packer, 28, an inner chamber and 29, are outer chambers.
Detailed Description
Referring to fig. 1-4, a preferred embodiment of the present invention is shown
The traditional electric submersible pump oil production device consists of an underground unit part, an electric power transmission part and a ground control part. The oil-submersible cable transmits the ground electric energy to the oil pumping motor, and the oil pumping motor is respectively connected with the oil well pump and the booster pump through an upper coupler and a lower coupler. The bottom of the booster pump is provided with the underground oil production multi-cavity spiral-flow type coarse separation device, so that oil and water are further effectively separated.
Oil recovery multicavity room spiral-flow type coarse separator in pit, which comprises a housin, the casing has interior cavity and surrounds and be annular outer cavity outside the cavity, and the external diameter of outer cavity equals the external diameter of booster pump, and interior cavity space is great, interior cavity has last separation portion, lower separation portion, the lower separation portion diameter of interior cavity is greater than the separation portion diameter, forms the step between separation portion, the lower separation portion. Outer cavity is located the last separator of inner chamber, the lower separator of inner chamber, outer cavity all are circle down cone type, and the height ratio of circle section, conic section is 1:3, the top of inner chamber sets up takes out oil pipe and is used for being connected with the oil-well pump, the circle section of outer cavity sets up tangential feed liquor pipe and is used for being connected with the inner chamber of booster pump, set up the tangential outlet pipe between the circle section of the separator under the conic section of outer cavity and the inner chamber, the next door inboard between the separator on outer cavity, the inner chamber sets up tangential oil pipe, ring baffle, the tangential outlet pipe is located the top of tangential outlet pipe, in this embodiment, the tangential outlet pipe is located the below of tangential feed liquor pipe and is located the upper portion of outer cavity conic section. The annular baffle is located the top of tangential play oil pipe, the bottom of inner chamber sets up the water injection pipe that is used for the water injection stratum of separating, be equipped with the check valve on tangential outlet pipe, tangential play oil pipe, the water injection pipe respectively.
The upper end of tangential feed liquor pipe is tangent with the surface of booster pump, and the lower extreme of tangential feed liquor pipe is tangent with outer cavity surface, the upper end of tangential outlet pipe is tangent with outer cavity surface, the lower extreme of tangential outlet pipe is tangent with interior cavity surface. The tangential liquid inlet pipes are arranged in a staggered manner along the vertical direction, the two tangential liquid inlet pipes are symmetrically arranged on the outer side of the outer cavity along the horizontal direction, and the rotating directions of the two tangential liquid inlet pipes are the same; the number of the tangential water outlet pipes is two, the two tangential water outlet pipes are arranged in a staggered mode along the vertical direction, the two tangential water outlet pipes are symmetrically arranged on the outer side of the inner cavity along the horizontal direction, and the rotation directions of the two tangential water outlet pipes are the same; the quantity of tangential oil outlet pipe is two, and two tangential oil outlet pipes are along vertical direction dislocation set, and two tangential oil outlet pipes set up in the inboard on next door along the horizontal direction symmetry, and the rotation of two tangential oil outlet pipes is the same.
In the cyclone process, oil and water enter the outer cavity chamber from the tangential liquid inlet pipe from top to bottom along the tangent line, so that the cyclone separation time of the liquid inlet is prolonged. After oil and water pass through the separation of outer cavity, get into the inner chamber, in oil at first got into the last separation portion of inner chamber, separation portion under the water entering, because the effect of centrifugal force, water flows down along inner chamber wall face, and oil can flow down along the central axis because the effect of gravity and centrifugal force. Finally, the water is discharged through a water injection pipe with a one-way valve and further injected into the stratum. After flowing downwards for a certain distance, the oil in the upper separation part is mixed with the crude oil separated from the inner chamber from bottom to top, and then continuously flows upwards for cyclone separation. Oil can be along the central axis upward return at whirl in-process, can receive the blockking of step between last separator, the lower separator, secondly upward return and can receive the blockking of ring baffle in getting into the upper separator of inner chamber. The thickness of the oil returning upwards can be reduced through blocking, and the part of the oil with better separation effect along the central axis can be sucked. When the lower part of the coarse separation device discharges water slowly and the tangential water inlet pipe enters the liquid quickly, the thickness of water along the wall surface of the inner chamber is increased, the pressure of a water outlet of the lower water injection pipe is increased, and the upward discharge speed of collected oil on the central axis is accelerated. The water is blocked by two layers at the upper part, wherein one layer is the blocking of the step between the upper separation part and the lower separation part, and the other layer is the blocking of the annular baffle of the upper separation part of the inner chamber. Due to the blocking effect, the pressure of a water outlet of the lower water injection pipe is further increased in the rotational flow process, the water discharging speed is increased, and the separation efficiency is improved. The oil-water mixing can be effectively prevented, the volume of water pumped out of the separator through the oil pumping communicating pipe on the upper part of the inner cavity is reduced, and the influence of the upward movement of the water on the water content of the extracted crude oil is prevented. Finally, the oil is extracted to an oil pump by an oil pumping pipe on the central axis of the upper part of the main inner chamber, finally enters an oil pipe, and then is lifted to the ground.
When the outer chamber and the inner chamber are designed, the small diameter of the cylinder and the long conical part are ensured as far as possible. The small diameter cylinder is beneficial to increasing the centrifugal force so as to improve the sedimentation speed; at the same time, the lengthening of the conical portion increases the liquid flow path, thereby increasing the separation time of the mixed liquid or the residence time of the mixed liquid in the chamber.
The invention is not limited to the above embodiment, if enough underground space exists, the lower part of the inner chamber can be added with the primary chamber to form a multi-chamber top-down combined structure, and the underground oil production multi-chamber cyclone crude separation device is designed to further increase the retention time of the separation liquid on the inner wall surface of the cyclone and enhance the separation effect.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (6)
1. The utility model provides a thick separator of oil recovery multicavity room spiral-flow type in pit, includes the casing, its characterized in that, the casing has interior cavity and encircles and be annular outer cavity outside the cavity, interior cavity has last separator, lower separator, outer cavity is located the last separator of interior cavity, the lower separator of interior cavity, outer cavity all are round cone type down, the top of interior cavity sets up takes out oil pipe and is used for being connected with the oil-well pump, the circle segment of outer cavity sets up tangential feed liquor pipe and is used for being connected with the inner chamber of booster pump, set up the tangential outlet pipe between the cone segment of outer cavity and the circle segment of interior cavity lower separator, the next door inboard between outer cavity, the interior cavity goes up the separator sets up tangential outlet pipe, tangential outlet pipe is located the top of tangential outlet pipe, the bottom of interior cavity sets up the water injection pipe that is used for pouring into the stratum with the water that separates, be equipped with the check valve on tangential outlet pipe, the water injection pipe respectively;
the diameter of the lower separating part of the inner chamber is larger than that of the upper separating part, and a step is formed between the upper separating part and the lower separating part;
the inner side of a partition wall between the upper separation parts of the outer chamber and the inner chamber is provided with an annular baffle plate which is positioned above the tangential oil outlet pipe.
2. The downhole oil production multi-chamber cyclone-type coarse separation device according to claim 1, wherein the upper end of the tangential liquid inlet pipe is tangent to the outer surface of the booster pump, the lower end of the tangential liquid inlet pipe is tangent to the outer surface of the outer chamber, the upper end of the tangential water outlet pipe is tangent to the outer surface of the outer chamber, and the lower end of the tangential water outlet pipe is tangent to the inner surface of the inner chamber.
3. The downhole oil production multi-cavity cyclone type coarse separation device according to claim 1 or 2, wherein the number of the tangential liquid inlet pipes is two, the two tangential liquid inlet pipes are symmetrically arranged on the outer side of the outer cavity along the horizontal direction, and the rotation directions of the two tangential liquid inlet pipes are the same; the number of the tangential water outlet pipes is two, the two tangential water outlet pipes are symmetrically arranged on the outer side of the inner cavity along the horizontal direction, and the rotating directions of the two tangential water outlet pipes are the same; the quantity of tangential oil outlet pipe is two, and two tangential oil outlet pipes set up the inboard at the next door along the horizontal direction symmetry, and the direction of rotation of two tangential oil outlet pipes is the same.
4. The downhole oil recovery multi-chamber cyclone type coarse separation device according to claim 3, wherein the two tangential liquid inlet pipes are arranged in a staggered manner in the vertical direction; the two tangential water outlet pipes are arranged along the vertical direction in a staggered manner; the two tangential oil outlet pipes are arranged along the vertical direction in a staggered manner.
5. The downhole production multi-chamber cyclonic rough separation device of claim 1, wherein the tangential oil outlet pipe is located below the tangential liquid inlet pipe.
6. The downhole production multi-chamber cyclonic rough separation device of claim 5, wherein the tangential flowlines are located at an upper portion of the outer chamber cone section.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710049547.4A CN106733243B (en) | 2017-01-23 | 2017-01-23 | Multi-cavity cyclone type crude separation device for underground oil production |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710049547.4A CN106733243B (en) | 2017-01-23 | 2017-01-23 | Multi-cavity cyclone type crude separation device for underground oil production |
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| CN106733243B true CN106733243B (en) | 2023-02-24 |
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| CN108176524A (en) * | 2017-12-27 | 2018-06-19 | 重庆市桑麻环保科技有限公司 | A kind of stainless steel centrum of industrial production cyclone separator |
| CN108590622B (en) * | 2018-05-04 | 2023-05-26 | 西南石油大学 | Natural gas hydrate underground separation device with vortex generator |
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