CN112253063A - Annular flow generator - Google Patents
Annular flow generator Download PDFInfo
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- CN112253063A CN112253063A CN202010970492.2A CN202010970492A CN112253063A CN 112253063 A CN112253063 A CN 112253063A CN 202010970492 A CN202010970492 A CN 202010970492A CN 112253063 A CN112253063 A CN 112253063A
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- pipeline
- oil
- inlet
- circular
- water inlet
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 73
- 238000005266 casting Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 107
- 238000000034 method Methods 0.000 description 13
- 238000005086 pumping Methods 0.000 description 9
- 230000009471 action Effects 0.000 description 7
- 230000009467 reduction Effects 0.000 description 7
- 230000002349 favourable effect Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Images
Classifications
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- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
-
- 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/02—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
- F04F5/10—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing liquids, e.g. containing solids, or liquids and elastic fluids
Abstract
The invention discloses an annular flow generator, which comprises an oil inlet pipeline, an oil outlet pipeline and a water inlet assembly, wherein the oil outlet pipeline is communicated with the outlet end of the oil inlet pipeline and is coaxially arranged, and the water inlet assembly is arranged between the oil inlet pipeline and the oil outlet pipeline; the water inlet assembly comprises a circular pipeline sleeved on the oil inlet pipeline and a plurality of water inlet pipelines arranged around the circular pipeline; the circular pipeline comprises a horizontal circular pipeline and a conical circular pipeline; the pipe diameter of the conical circular ring pipeline is gradually reduced along the conveying direction of the oil inlet pipeline, one end of the conical circular ring pipeline is communicated with the horizontal circular ring pipeline, and the other end of the conical circular ring pipeline is communicated with the inlet end of the oil outlet pipeline; the water inlet pipeline is communicated with the horizontal circular pipeline; the outlet end of the oil inlet pipeline is provided with a reducing section which is communicated with the inlet end of the oil outlet pipeline and the conical ring pipeline. The generator has a simple structure, reduces the conveying resistance of the thickened oil by utilizing the annular flow conveying mode, thereby improving the conveying efficiency of the thickened oil.
Description
Technical Field
The invention relates to the technical field of thick oil conveying, in particular to an annular flow generator.
Background
In recent years, unconventional oil is more and more mined, and according to survey, the geological reserves of thick oil in China are quite rich, but because the thick oil has high content of colloid and asphaltene, high density, high viscosity and poor fluidity, and is extremely easy to adhere to the pipe wall, enough energy needs to be provided in the process of production and transportation to overcome flow resistance; in addition, the heavy oil with high wax content has higher freezing point, wax crystals are easy to precipitate and block pipelines in the flowing process, and the wax crystals and the pipelines all bring great challenges to the exploitation and the transportation of the heavy oil; therefore, the production scale of thick oil is not very large.
At present, the pipeline conveying method of the thickened oil mainly comprises a heating method, a diluting method, an emulsifying viscosity-reducing method, a modifying conveying method, a microbial decomposition method and the like. However, these methods have certain limitations; for example, the heating method has high energy consumption and is easy to have the risk of tube condensation; the thin oil blending method requires stable and reliable supply of thin oil resources; the later stage of the emulsification viscosity-reducing method needs demulsification treatment. However, the oil-water annular flow transports the thick oil through the flow shape of wrapping the oil phase by the water phase, and the thick oil is not contacted with the pipe wall under the wrapping of the low-viscosity liquid water, so that the frictional resistance between the pipe wall and the thick oil is effectively avoided, and the power and the cost of the pump are effectively reduced. In recent years, under the study of the oil-water annular flow, a mechanism device for generating the oil-water annular flow has also been studied. For example, utility model publication No. CN205628330U discloses an annular flow nozzle; the utility model with the publication number of CN206753550U discloses a water ring generator device for oil field production; the annular flow equipment of profit disclosed in foretell patent all can form the annular flow of profit at viscous crude delivery entrance and flow the shape, and the oil inlet pipe way enlarges gradually and makes the water ring that flows around the wall narrow gradually, and this kind of structure plays the effect of drag reduction step-down, can reduce the interference of admitting air simultaneously. However, the above solutions all have the following disadvantages: the oil inlet pipe is sleeved in the outer pipeline in a suspended mode, when thick oil is pumped into the device, certain impact can be caused to the pipeline, and the impact directly influences the stability of an oil-water annular flow pattern. In addition, the two patents need to use two devices respectively to pump thick oil and water into the pipeline during working, the pumping mode increases the investment of economic cost, and the inflow of water can cause certain impact on an oil inlet pipe. Therefore, there is a need for a device with simple structure and capable of reducing the contact between the thick oil and the inner wall of the pipeline so as to reduce the friction between the thick oil and the inner wall of the pipeline.
Disclosure of Invention
The present invention has been made to overcome the above problems, and an object of the present invention is to provide an annular flow generator, which has a simple structure, reduces the resistance to thick oil transportation by using an annular flow transportation method, and reduces the impact of thick oil and water on a pipeline before the thick oil and water form an annular flow, thereby improving the efficiency of thick oil transportation.
The purpose of the invention is realized by the following technical scheme:
an annular flow generator comprises an oil inlet pipeline, an oil outlet pipeline which is communicated with the outlet end of the oil inlet pipeline and is coaxially arranged, and a water inlet assembly which is arranged between the oil inlet pipeline and the oil outlet pipeline; wherein the content of the first and second substances,
the water inlet assembly comprises a circular pipeline sleeved on the oil inlet pipeline and a plurality of water inlet pipelines arranged around the circular pipeline; the circular pipeline comprises a horizontal circular pipeline and a conical circular pipeline; the pipe diameter of the conical circular ring pipeline is gradually reduced along the conveying direction of the oil inlet pipeline, one end of the conical circular ring pipeline is communicated with the horizontal circular ring pipeline, and the other end of the conical circular ring pipeline is communicated with the inlet end of the oil outlet pipeline; the water inlet pipeline is communicated with the horizontal circular pipeline;
the outlet end of the oil inlet pipeline is provided with a reducing section which is communicated with the inlet end of the oil outlet pipeline and the conical ring pipeline.
The working principle of the annular flow generator is as follows:
when thick oil pumping is started, firstly, pumping sufficient low-viscosity liquid (such as water) from the water inlet pipeline to the circular pipeline and the oil outlet pipeline through an external device (a water pump), and preliminarily wetting the circular flow generator; then the external equipment is closed, and the water pumping is stopped; then opening an external device for pumping thick oil, conveying the thick oil from an oil inlet pipeline to an oil outlet pipeline, increasing the flow speed and reducing the pressure intensity when the thick oil passes through a reducing section, so as to generate negative pressure, wherein water enters a horizontal circular pipeline from an water inlet pipeline under the action of the negative pressure and the atmospheric pressure intensity, then enters a conical circular pipeline and finally enters the oil outlet pipeline, and the water forms annular water flow taking the thick oil as a core in the oil outlet pipeline under the action of the conical circular pipeline; the viscous oil with high viscosity is wrapped by the water with low viscosity, so that the viscous oil with high viscosity is prevented from directly contacting the inner wall of the pipeline, and the frictional resistance between the viscous oil and the pipeline is reduced, so that the purpose of pressure reduction and drag reduction in conveying is achieved.
In a preferred embodiment of the present invention, the angle of the tapered section is 40 ° to 90 °. Its benefit lies in, because the pipe diameter of convergent section reduces along the direction of delivery of advancing oil pipe way gradually, when viscous crude through the convergent section, the velocity of flow increases, and pressure reduces to produce the negative pressure.
Preferably, still include the flange, the flange is including setting up the first flange at the oil inlet pipeline entry end, setting up the second flange at the oil outlet pipeline exit end and setting up the third flange at the inlet channel entry end. Through setting up the flange, can make things convenient for installation and dismantlement between the pipeline.
Preferably, the length of the oil inlet pipeline is longer than that of the annular pipeline; the oil inlet pipeline structure has the advantages that on one hand, the first flange on the oil inlet pipeline is conveniently connected with external equipment, and the phenomenon that the annular pipeline is interfered with the external equipment due to the fact that the oil inlet pipeline is too short is avoided; on the other hand, when the thickened oil flows through the tapered section, the thickened oil has a long enough distance to buffer the flow speed, so that the phenomenon that the oil outlet pipeline is impacted excessively is avoided, and the formation of annular water flow is not facilitated.
Preferably, the number of the water inlet pipes is 4, and the 4 water inlet pipes are uniformly distributed along the circumferential direction of the circular ring pipe. Through setting up above-mentioned structure, 4 inlet channels make can keep the supply of sufficient water in the ring pipeline, 4 inlet channels are the water uniform flow in the favourable and ring pipeline of circumference distribution to be favorable to forming annular rivers in the oil pipeline.
Further, the water inlet pipeline is vertically arranged on the horizontal circular pipeline. The vertical arrangement on the horizontal circular pipeline is favorable for the water inlet pipeline to be connected with external equipment.
Preferably, the oil inlet pipeline, the water inlet pipeline and the circular pipeline are all produced through a casting process.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the annular pipeline is arranged to convey the thick oil from the oil inlet pipeline to the oil outlet pipeline, when the thick oil passes through the tapered section, the flow rate is increased, the pressure intensity is reduced, so that negative pressure is generated, under the action of the negative pressure and the atmospheric pressure intensity, water can enter the horizontal annular pipeline from the water inlet pipeline, then enter the conical annular pipeline and finally enter the oil outlet pipeline, and due to the action of the conical annular pipeline, the water forms annular water flow taking the thick oil as a core in the oil outlet pipeline; the viscous oil with high viscosity is wrapped by the water with low viscosity, so that the viscous oil with high viscosity is prevented from directly contacting the inner wall of the pipeline, and the frictional resistance between the viscous oil and the pipeline is reduced, so that the purpose of pressure reduction and drag reduction in conveying is achieved; thereby improving the conveying efficiency of the thick oil.
2. The circular pipeline in the invention is composed of a horizontal circular pipeline and a conical circular pipeline, and compared with the annular flow generating equipment in the prior art, the circular pipeline has the characteristics of simple structural design and low production cost.
3. According to the invention, the outlet end of the oil inlet pipeline is provided with the tapered section which is in a conical geometric structure, so that negative pressure is formed in the pipeline, and water is sucked into the device under the action of atmospheric pressure, thereby reducing the economic cost of pumping.
Drawings
Fig. 1-2 are schematic structural views of a first embodiment of a toroidal flow generator according to the present invention, wherein fig. 1 is a perspective view and fig. 2 is a front view.
Fig. 3 is a sectional view taken along a-a in fig. 2.
Fig. 4 is a schematic structural view of another embodiment of a toroidal flow generator according to the present invention.
Detailed Description
In order to make those skilled in the art understand the technical solutions of the present invention well, the following description of the present invention is provided with reference to the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
Example 1
Referring to fig. 1-3, the embodiment discloses an annular flow generator, which includes an oil inlet pipe 1, an oil outlet pipe 2 coaxially disposed and communicated with an outlet end of the oil inlet pipe 1, an inlet assembly disposed between the oil inlet pipe 1 and the oil outlet pipe 2, and a flange.
Referring to fig. 1-3, the water inlet assembly comprises a circular pipeline sleeved on the oil inlet pipeline 1 and 4 water inlet pipelines 3 arranged around the circular pipeline; the circular pipeline comprises a horizontal circular pipeline 4 and a conical circular pipeline 5; the pipe diameter of the conical circular pipeline 5 is gradually reduced along the conveying direction of the oil inlet pipeline 1, one end of the conical circular pipeline 5 is communicated with the horizontal circular pipeline 4, and the other end of the conical circular pipeline is communicated with the inlet end of the oil outlet pipeline 2; the 4 water inlet pipelines 3 are uniformly distributed along the circumferential direction of the horizontal circular pipeline 4, and each water inlet pipeline 3 is communicated with the horizontal circular pipeline 4; through setting up above-mentioned structure, 4 inlet channels 3 make can keep the supply of sufficient water in the ring pipeline, 4 inlet channels 3 are the water uniform flow in the favourable and ring pipeline of circumference distribution to be favorable to forming annular rivers in oil pipeline 2.
Referring to fig. 3, a tapered section 1-1 is arranged at the outlet end of the oil inlet pipeline 1, the tapered section 1-1 is communicated with the inlet end of the oil outlet pipeline 2 and the conical ring pipeline 5, and the included angle of the tapered section 1-1 is 40-90 degrees. The beneficial effect is that as the pipe diameter of the reducing section 1-1 is gradually reduced along the conveying direction of the oil inlet pipeline 1, when thick oil passes through the reducing section 1-1, the flow speed is increased, the pressure intensity is reduced, and thus negative pressure is generated.
Referring to fig. 1-3, the flanges include a first flange 6 disposed at an inlet end of the oil inlet pipe 1, a second flange 7 disposed at an outlet end of the oil outlet pipe 2, and a third flange 8 disposed at an inlet end of the water inlet pipe 3. Through setting up the flange, can make things convenient for installation and dismantlement between the pipeline.
Referring to fig. 1-3, the length of the oil inlet pipe 1 is longer than that of the circular ring pipe; the oil inlet pipeline has the advantages that on one hand, the first flange 6 on the oil inlet pipeline 1 is convenient to be connected with external equipment, and the phenomenon that the annular pipeline is interfered with the external equipment due to the fact that the oil inlet pipeline 1 is too short is avoided; on the other hand, when the thickened oil flows through the reducing section 1-1, the thickened oil has a long enough distance to buffer the flow speed, so that the oil outlet pipeline 2 is prevented from being impacted excessively, and the formation of annular water flow is not facilitated.
Referring to fig. 1-3, the water inlet pipe 3 is vertically arranged on the horizontal ring pipe 4. The vertical arrangement of the water inlet pipe 3 on the horizontal ring pipe 4 is beneficial to the connection of the water inlet pipe and external equipment.
Specifically, the oil inlet pipeline 1, the water inlet pipeline 3 and the circular pipeline are all produced through a casting process.
Referring to fig. 1-3, the operation principle of the above-mentioned annular flow generator is as follows:
when thick oil pumping starts, firstly, sufficient low-viscosity liquid (such as water) is pumped from the water inlet pipeline 3 to the circular pipeline and the oil outlet pipeline 2 through an external device (a water pump), and the circular flow generator is preliminarily wetted; then the external equipment is closed, and the water pumping is stopped; then, opening external equipment for pumping thick oil, conveying the thick oil from the oil inlet pipeline 1 to the oil outlet pipeline 2, increasing the flow speed and reducing the pressure intensity when the thick oil passes through the reducing section 1-1 so as to generate negative pressure, wherein water enters the horizontal circular pipeline 4 from the water inlet pipeline 3 under the action of the negative pressure and the atmospheric pressure intensity, then enters the conical circular pipeline 5 and finally enters the oil outlet pipeline 2, and annular water flow taking the thick oil as a core is formed in the oil outlet pipeline 2 due to the action of the conical circular pipeline 5; the viscous oil with high viscosity is wrapped by the water with low viscosity, so that the viscous oil with high viscosity is prevented from directly contacting the inner wall of the pipeline, and the frictional resistance between the viscous oil and the pipeline is reduced, so that the purpose of pressure reduction and drag reduction in conveying is achieved.
Example 2
Referring to fig. 4, the other structure of the present embodiment is the same as that of embodiment 1, except that the water inlet pipe 3 is disposed in parallel with the horizontal circular pipe 4. The advantage of adopting above-mentioned structure lies in, can guarantee that the rivers in horizontal ring pipeline 4 are more steady.
The present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.
Claims (7)
1. The annular flow generator is characterized by comprising an oil inlet pipeline, an oil outlet pipeline which is communicated with the outlet end of the oil inlet pipeline and is coaxially arranged, and a water inlet assembly which is arranged between the oil inlet pipeline and the oil outlet pipeline; wherein the content of the first and second substances,
the water inlet assembly comprises a circular pipeline sleeved on the oil inlet pipeline and a plurality of water inlet pipelines arranged around the circular pipeline; the circular pipeline comprises a horizontal circular pipeline and a conical circular pipeline; the pipe diameter of the conical circular ring pipeline is gradually reduced along the conveying direction of the oil inlet pipeline, one end of the conical circular ring pipeline is communicated with the horizontal circular ring pipeline, and the other end of the conical circular ring pipeline is communicated with the inlet end of the oil outlet pipeline; the water inlet pipeline is communicated with the horizontal circular pipeline;
the outlet end of the oil inlet pipeline is provided with a reducing section which is communicated with the inlet end of the oil outlet pipeline and the conical ring pipeline.
2. The annular flow generator of claim 1 wherein the angle of the tapered section is 40 ° -90 °.
3. The annular flow generator of claim 1 or 2, further comprising flanges including a first flange disposed at an inlet end of the oil inlet pipe, a second flange disposed at an outlet end of the oil outlet pipe, and a third flange disposed at an inlet end of the water inlet pipe.
4. A toroidal flow generator as claimed in claim 1 or 2 wherein said oil inlet conduit is longer than the length of the toroidal tube.
5. The annular flow generator according to claim 1 or 2, wherein the number of the water inlet pipes is 4, and the 4 water inlet pipes are evenly distributed along the circumferential direction of the annular pipe.
6. The annular flow generator of claim 5 wherein the inlet conduit is vertically disposed on the horizontal annular conduit.
7. The annular flow generator of claim 1, 2 or 6, wherein the oil inlet pipe, the water inlet pipe and the annular pipe are all produced by a casting process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010970492.2A CN112253063A (en) | 2020-09-15 | 2020-09-15 | Annular flow generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010970492.2A CN112253063A (en) | 2020-09-15 | 2020-09-15 | Annular flow generator |
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| Publication Number | Publication Date |
|---|---|
| CN112253063A true CN112253063A (en) | 2021-01-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010970492.2A Pending CN112253063A (en) | 2020-09-15 | 2020-09-15 | Annular flow generator |
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| Country | Link |
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| CN (1) | CN112253063A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113175577A (en) * | 2021-05-17 | 2021-07-27 | 广州大学 | Three-way pipe capable of forming annular flow of oil and water |
| CN114427549A (en) * | 2022-01-27 | 2022-05-03 | 广州大学 | Wedge wave annular flow generator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4745937A (en) * | 1987-11-02 | 1988-05-24 | Intevep, S.A. | Process for restarting core flow with very viscous oils after a long standstill period |
| CN202850958U (en) * | 2012-08-30 | 2013-04-03 | 中国海洋石油总公司 | Jet flow pressure regulating device of injection well |
| CN203281236U (en) * | 2013-04-27 | 2013-11-13 | 中国石油天然气股份有限公司 | Oil delivery centrifugal pump watering device for thick oil delivery |
| CN207438003U (en) * | 2017-11-20 | 2018-06-01 | 西南石油大学 | One kind is for the dilute drag reduction layering conveying device of lifting thickened oil |
| CN209470032U (en) * | 2019-01-08 | 2019-10-08 | 西南石油大学 | A kind of adjustable water ring generating device of water ring thickness |
| CN210637321U (en) * | 2019-07-29 | 2020-05-29 | 西南石油大学 | Oil-water annular flow stabilizing device |
-
2020
- 2020-09-15 CN CN202010970492.2A patent/CN112253063A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4745937A (en) * | 1987-11-02 | 1988-05-24 | Intevep, S.A. | Process for restarting core flow with very viscous oils after a long standstill period |
| CN202850958U (en) * | 2012-08-30 | 2013-04-03 | 中国海洋石油总公司 | Jet flow pressure regulating device of injection well |
| CN203281236U (en) * | 2013-04-27 | 2013-11-13 | 中国石油天然气股份有限公司 | Oil delivery centrifugal pump watering device for thick oil delivery |
| CN207438003U (en) * | 2017-11-20 | 2018-06-01 | 西南石油大学 | One kind is for the dilute drag reduction layering conveying device of lifting thickened oil |
| CN209470032U (en) * | 2019-01-08 | 2019-10-08 | 西南石油大学 | A kind of adjustable water ring generating device of water ring thickness |
| CN210637321U (en) * | 2019-07-29 | 2020-05-29 | 西南石油大学 | Oil-water annular flow stabilizing device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113175577A (en) * | 2021-05-17 | 2021-07-27 | 广州大学 | Three-way pipe capable of forming annular flow of oil and water |
| CN113175577B (en) * | 2021-05-17 | 2022-07-05 | 广州大学 | Three-way pipe capable of forming annular flow of oil and water |
| CN114427549A (en) * | 2022-01-27 | 2022-05-03 | 广州大学 | Wedge wave annular flow generator |
| CN114427549B (en) * | 2022-01-27 | 2023-11-14 | 广州大学 | Wedge wave annular flow generator |
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Application publication date: 20210122 |
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