CN110984935B - Intelligent regulation and control device for steam of ground steam injection pipe network of oil field - Google Patents
Intelligent regulation and control device for steam of ground steam injection pipe network of oil field Download PDFInfo
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- CN110984935B CN110984935B CN201911273698.3A CN201911273698A CN110984935B CN 110984935 B CN110984935 B CN 110984935B CN 201911273698 A CN201911273698 A CN 201911273698A CN 110984935 B CN110984935 B CN 110984935B
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- 238000010793 Steam injection (oil industry) Methods 0.000 title claims abstract description 61
- 238000000926 separation method Methods 0.000 claims abstract description 13
- 238000005192 partition Methods 0.000 claims description 40
- 238000007789 sealing Methods 0.000 claims description 19
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 230000001276 controlling effect Effects 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 238000011084 recovery Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 14
- 239000012071 phase Substances 0.000 description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000005191 phase separation Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000007726 management method Methods 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 230000005514 two-phase flow Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000013523 data management Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004401 flow injection analysis Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000012384 transportation and delivery Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Pipeline Systems (AREA)
Abstract
The invention provides an intelligent regulation and control device for steam in a ground steam injection pipe network of an oil field, wherein a rectifier is embedded in a steam injection pipeline, and a separation regulator is welded on the steam injection pipeline; the inner wall of the body A is welded with a fixed baffle, a connecting shaft is connected with a movable baffle, the movable baffle is welded on a movable rod, a main branch outlet is communicated with a steam injection pipeline, one end of a branch cavity is blocked, a side branch outlet is communicated with a branch pipeline, and a flow regulator is welded on the branch pipeline; the bottom of the body B is provided with a gear sliding strip which is connected with a stepping motor, a supporting rod is arranged in the body B, a fixed float is arranged on the supporting rod, and a nozzle is welded in the body B; the advantages are that: the invention improves the distribution capacity of the steam enthalpy value of the ground steam injection pipe network, combines the critical flow principle of the nozzles, realizes equal dryness constant flow steam distribution of different pressures, creates favorable conditions for optimizing the thick oil steam injection and thermal recovery process, effectively utilizing energy and evaluating the steam injection effect, and provides a new technical support for the development of thick oil thermal recovery steam injection.
Description
Technical Field
The invention relates to the field of thickened oil thermal recovery in the development process of petroleum industry, in particular to an intelligent regulation and control device for steam in a ground steam injection pipe network of an oil field.
Background
The world thick oil reserves are rich, steam injection exploitation is an important method for thick oil development, different flow patterns can be formed in a pipeline by steam in the process of conveying the steam to a steam injection well in an oil field, and the different flow patterns have phase separation phenomenon in the flowing process of a steam injection pipe network, so that a plurality of problems are brought to the distribution of the dryness and the flow of the steam injection.
The steam injection wells of the thickened oil fields are usually supplied with steam by a main line through branch lines, and the connection points of the main line and the branch lines adopt straight-through tee joints, and the tee joints cause serious non-uniformity of dryness before and after steam distribution due to structural asymmetry of two outlets relative to an inlet, so that the overall effect of block steam injection is affected.
Tee is a common pipe network component and is involved in almost all pipe network delivery systems. When the vapor-water two-phase flow passes through the T-shaped tee joint, the liquid and the gas can select respective preferential paths, and obvious difference occurs in dryness of the 2 branch pipes (the side branch pipe and the straight branch pipe), and the phenomenon is called drift phenomenon or phase separation. Research on phase separation of steam-water two-phase flow at T-shape begins in the fields of oil exploitation and nuclear power generation. When thick oil is extracted, high-temperature and high-pressure water vapor in the main pipeline is conveyed to each oil well through a pipeline network for vapor injection. In practice, it is often found that some steam injection well heads have high steam quality, while other steam injection well heads are almost entirely hot water at high temperature, and the energy reaching each well is very different. And finally, the steam injection efficiency and the crude oil production amount of the whole oil well production zone are greatly reduced.
The three-way pipe is the simplest distributing element applied to the fluid conveying pipeline, the three-way pipe can be arranged to be horizontal or vertical to the main pipe according to the requirement, and the side branch pipes can also be arranged at various angles. Because the two-phase fluid is very complex to distribute through the tee pipe, not only the flow distribution problem is related, but also the two-phase distribution problem is related, the prediction result error of the method is very large, the phase distribution of the T-shaped tee two-phase flow is always inconsistent, and obvious difference exists between the steam water proportion of the outlets of the two branch pipes, and the phenomenon is called the tee pipe phase separation phenomenon.
The outlet of the steam injection boiler is wet steam with dryness x less than or equal to 80%, and the steam injection boiler is a two-phase mixture of saturated water and saturated steam, and the steam flow in the steam transmission pipeline belongs to a steam-liquid two-phase pipe flow. The two-phase pipe flow has the same point as the single-phase pipe flow (pure gas phase or pure liquid phase flow), and the pressure change is caused by friction, gravity and flow velocity change; the difference is that the calculation methods of the pressure changes are different, and the single-phase pipe flow only distinguishes laminar flow, turbulent flow and transitional flow; and is independent of the orientation and flow direction in which the tube is placed; the flow patterns of two-phase tube flows are relatively complex and dependent on tube orientation, flow direction.
The ground steam transmission pipeline does not change greatly in height from the boiler outlet to the steam injection well mouth, so that a heavy pressure difference is not generated; the flow rate is unchanged, the density is not changed greatly, so that the acceleration is changed slightly, and no obvious acceleration pressure difference exists; thus, when the energy flow parameters of the ground steam pipeline are calculated according to different operating conditions, only the pressure difference caused by friction resistance can be calculated, and the pressure is smaller and smaller from the boiler outlet to the steam injection well inlet. This is an analysis made from a quantitative perspective. From the analysis of energy, the heat-insulating layer is arranged outside the ground steam-conveying pipeline, but still has certain heat loss, and the heat loss is not negligible, and the dryness of steam can be changed, so that the proportion of gas phase and liquid phase is influenced, and the friction pressure difference is changed.
In summary, the oilfield pipe network itself is composed of many complicated straight pipes and three-way distributors, and under the existing pipe network structure, how to upgrade and reform the original steam injection pipe network, reduce phase separation, and ensure that the steam injection flows of all branches are distributed according to the design while ensuring that the steam injection dryness of all branches is the same.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides an intelligent regulation and control device for steam in a ground steam injection pipe network of an oil field.
The novel technical scheme of the invention is as follows: the intelligent regulation and control device for the steam of the ground steam injection pipe network of the oil field comprises a wireless receiving and sending system, a flow regulator, a steam injection pipeline, a rectifier, a separation regulator, a regulation and control system, a flow sensing system and a branch pipeline, wherein the intelligent regulation and control device is T-shaped, the rectifier is embedded in the steam injection pipeline, and the separation regulator is welded on the rear steam injection pipeline of the rectifier; the separation regulator comprises a fixed partition plate, a movable partition plate, a side branch outlet, a movable rod, a sealing gasket, a sealing cavity, a connecting shaft, a main branch outlet and a body A, wherein the sealing cavity is arranged at the upper part in the body A, the sealing gasket is arranged in the sealing cavity, the inner wall of the body A is welded on one side of the fixed partition plate, the other side of the fixed partition plate is welded on the connecting shaft, the connecting shaft is connected on one side of the movable partition plate, the other side of the movable partition plate is welded on one end of the movable rod, the movable rod extends out of the body A, the other end of the movable rod is connected with a stepping motor, the stepping motor is controlled by a regulating and controlling system, a large sector surrounded by the fixed partition plate and the movable partition plate is a main branch outlet, the main branch outlet is communicated with a steam injection pipeline, a small sector surrounded by the fixed partition plate and the movable partition plate is a branch cavity, one end of the branch cavity is provided with the side branch outlet corresponding to the body A wall, the side branch outlet is communicated with the branch pipeline, and a flow regulator is welded on the branch pipeline; the flow regulator comprises a body B, a stepping motor, a gear sliding strip, a supporting rod, a fixed floater and a nozzle, wherein the gear sliding strip is arranged at the bottom of the body B, the gear sliding strip is connected with the stepping motor, the stepping motor is controlled by a regulating and controlling system, the supporting rod is arranged in the middle of the body B, the fixed floater is arranged on the supporting rod, and the nozzle is welded in the body B; and the branch pipeline is provided with a wireless receiving and transmitting system and a flow sensing system.
The rectifier is a rotational flow split phase.
The sealing gasket in the separation regulator is a graphite gasket.
The nozzle is a venturi nozzle.
The nozzle is horn-shaped.
The beneficial effects of the invention are as follows: the invention improves the distribution capacity of the steam enthalpy value of the ground steam injection pipe network, combines the critical flow principle of the nozzles, realizes equal dryness constant flow steam distribution of different pressures, creates favorable conditions for optimizing the thick oil steam injection and thermal recovery process, effectively utilizing energy and evaluating the steam injection effect, and provides a new technical support for the development of thick oil thermal recovery steam injection.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of the separation adjuster.
Fig. 3 is a schematic structural view of the flow regulator.
Fig. 4 is a schematic structural diagram of a rectifier.
Wherein: the wireless receiving and transmitting system comprises a wireless receiving and transmitting system 1, a flow regulator 2, a body B201, a stepping motor 202, a gear sliding bar 203, a supporting rod 204, a fixed floater 205, a nozzle 206, a steam injection pipeline 3, a rectifier 4, a separation regulator 5, a fixed partition plate 501, a movable partition plate 502, a side branch outlet 503, a movable rod 504, a sealing gasket 505, a sealing cavity 506, a connecting shaft 507, a main branch outlet 508, a body A509, a regulating and controlling system 6, a flow sensing system 7 and a branch pipeline 8.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The intelligent regulation and control device for the steam of the ground steam injection pipe network of the oil field comprises a wireless receiving and sending system 1, a flow regulator 2, a steam injection pipeline 3, a rectifier 4, a separation regulator 5, a regulation and control system 6, a flow sensing system 7 and a branch pipeline 8, wherein the intelligent regulation and control device is of a T type, the rectifier 4 is embedded in the steam injection pipeline 3, and the separation regulator 5 is welded on the steam injection pipeline 3 behind the rectifier 4; the partition regulator 5 comprises a fixed partition plate 501, a movable partition plate 502, a side branch outlet 503, a movable rod 504, a sealing gasket 505, a sealing cavity 506, a connecting shaft 507, a main branch outlet 508 and a body A509, wherein the sealing cavity 506 is arranged at the upper part in the body A509, the sealing gasket 505 is arranged in the sealing cavity 506, the inner wall of the body A509 is welded at one side of the fixed partition plate 501, the other side of the fixed partition plate 501 is welded on the connecting shaft 507, the connecting shaft 507 is connected at one side of the movable partition plate 502, the other side of the movable partition plate 502 is welded at one end of the movable rod 504, the movable rod 504 extends out of the body A509, the other end of the movable rod 504 is connected with a stepping motor, the stepping motor is controlled by a regulating and controlling system 6, a large fan formed by enclosing the fixed partition plate 501 and the movable partition plate 502 is a main branch outlet 508, the main branch outlet 508 is communicated with a gas injection pipeline 3, a small fan formed by enclosing the fixed partition plate 501 and the movable partition plate 502 is a branch cavity, one end of the branch cavity is blocked, the corresponding body A wall 509 is provided with a side outlet 503, the side outlet 503 is communicated with a regulating and controlling pipeline 8 is communicated with a branch pipeline 8; the flow regulator 2 comprises a body B201, a stepping motor 202, a gear sliding bar 203, a supporting rod 204, a fixed floater 205 and a nozzle 206, wherein the gear sliding bar 203 is arranged at the bottom of the body B201, the gear sliding bar 203 is connected with the stepping motor 202, the stepping motor 202 is controlled by a regulating and controlling system 6, the supporting rod 204 is arranged in the middle part of the body B201, the fixed floater 205 is arranged on the supporting rod 204, and the nozzle 206 is welded in the body B201; the branch pipeline 8 is provided with a wireless receiving and transmitting system 1 and a flow sensing system 7.
The rectifier 4 is a rotational flow split phase.
The seal 505 in the separation adjuster 5 is a graphite pad.
The nozzle 206 is a venturi nozzle.
The nozzle 206 is horn-shaped.
Wet saturated steam (with the dryness of 70-99%) generated by the steam injection boiler enters the rectifier 4 through the steam injection pipeline 3, the rectifier 4 sorts the steam flow pattern, the water with high density in the steam is pushed to the inner wall of the pipeline by utilizing the centrifugal force principle, and dry steam with low density is gathered in the center of the pipeline to form standard annular flow. The uniform annular flow after the arrangement of the rectifier 4 is sealed and distributed in the pipe, the fluid after the rectification enters the fixed partition plate 501 and the movable partition plate 502, wherein the fixed partition plate 501 and the movable partition plate 502 are connected through the connecting shaft 507, the fixed area formed by the movable partition plate 502 and the fixed partition plate 501 is distributed according to the design flow, the fluid enters the side branch outlet 503, the rest part enters the main branch outlet 508, and the steam entering the main branch outlet 508 enters the downstream. If the flow of each branch is changed, dragging the movable partition 502 to re-divide the area by the stepping motor when the adjustment is needed, so as to meet the designed steam injection flow; the flow pattern arranged by the rectifier 4 is a steam flow pattern based on the axial symmetry of the pipe, and the steam can be isolated and distributed by adopting the principle of area segmentation, so that the steam flow can be distributed according to the steam entering the isolation regulator 5 of each branch steam injection well, and the steam dryness in the outlet of the steam injection pipeline 3 and the branch pipeline 8 is equal because the steam is in an axial symmetry structure in the isolating process. Meanwhile, in order to overcome the influence of pressure difference of each branch steam injection well on steam flow distribution, a flow regulating device is adopted to control the pressure difference of the branch well, and a critical flow principle is adopted to realize constant flow injection; steam entering the side branch outlet 503 enters the flow regulator 2, the fixed floater 205 is supported by the supporting rod 204, the flow area is controlled according to the designed flow, the flow area of the venturi nozzle 206 meets the critical flow principle, if the flow rate of each branch steam injection well changes, the flow area of the venturi nozzle 206 is adjusted through the gear sliding strip 203 and the stepping motor 202, the influence of the pressure difference of each downstream steam injection well on the upstream flow rate and flow pattern is isolated, and the steam enters the branch pipe 8 through the venturi nozzle 206 and then enters the steam injection well.
In order to reasonably regulate the flow of each branch steam injection well according to the flow of the steam injection boiler, the intelligent regulation device for the dryness constant flow of steam and the like is provided with a flow sensing system 7, a regulation system 6 and a wireless receiving and transmitting system 1, and the wireless receiving and transmitting system 1 receives and transmits the flow data acquired by the flow sensing system 7 and controls and regulates the flow of each branch steam injection well through the regulation system 6. The collected signals are communicated with a wireless main network through a wireless receiving and transmitting system 1, the signals transmitted in two directions are input into a data management system for classification management, the signals are transmitted into a steam injection flow dryness management system through a data transmission line for centralized management and regulation, and a transmitting instruction is reversely transmitted to the wireless receiving and transmitting system 1 for intelligent regulation.
Claims (3)
1. The utility model provides an oil field ground steam injection pipe network steam intelligent regulation and control device, includes wireless receiving and dispatching system (1), flow regulator (2), steam injection pipeline (3), rectifier (4), separates regulator (5), regulation and control system (6), flow sensing system (7) and lateral conduit (8), its characterized in that: the intelligent regulation and control device is T-shaped, a rectifier (4) is embedded in the steam injection pipeline (3), and a separation regulator (5) is welded on the steam injection pipeline (3) behind the rectifier (4); the separation regulator (5) comprises a fixed partition plate (501), a movable partition plate (502), a side branch outlet (503), a movable rod (504), a sealing gasket (505), a sealing cavity (506), a connecting shaft (507), a main branch outlet (508) and a body A (509), wherein the sealing cavity (506) is arranged at the inner upper part of the body A (509), the sealing gasket (505) is arranged in the sealing cavity (506), the inner wall of the body A (509) is welded at one side of the fixed partition plate (501), the other side of the fixed partition plate (501) is welded on the connecting shaft (507), the connecting shaft (507) is connected at one side of the movable partition plate (502), the other side of the movable partition plate (502) is welded at one end of the movable rod (504), the movable rod (504) extends to the outer side of the body A (509), the other end of the movable rod (504) is connected with a stepping motor, the stepping motor is controlled by a regulating system (6), a large fan formed by the fixed partition plate (501) and the movable partition plate (502) is a main branch outlet (508), the main branch outlet (508) is communicated with a small fan-shaped partition plate (501) and a small cavity (502) is enclosed by the movable partition plate (502), a side branch outlet (503) is arranged on the wall of the body A (509) corresponding to the branch cavity, the side branch outlet (503) is communicated with a branch pipeline (8), and a flow regulator (2) is welded on the branch pipeline (8); the flow regulator (2) comprises a body B (201), a stepping motor (202), a gear sliding strip (203), a supporting rod (204), a fixed floater (205) and a nozzle (206), wherein the gear sliding strip (203) is arranged at the bottom of the body B (201), the gear sliding strip (203) is connected with the stepping motor (202), the stepping motor (202) is controlled by a regulating and controlling system (6), the supporting rod (204) is arranged in the middle part of the body B (201), the fixed floater (205) is arranged on the supporting rod (204), and the nozzle (206) is welded in the body B (201); the branch pipeline (8) is provided with a wireless receiving and transmitting system (1) and a flow sensing system (7);
the rectifier (4) is a rotational flow split phase;
The inner sealing gasket (505) of the separation regulator (5) is a graphite gasket.
2. The intelligent regulation and control device for steam in a steam injection pipe network of the ground of an oil field according to claim 1, wherein: the nozzle (206) is a venturi nozzle.
3. The intelligent regulation and control device for steam in a steam injection pipe network of the ground of an oil field according to claim 1 or 2, wherein: the nozzle (206) is horn-shaped.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911273698.3A CN110984935B (en) | 2019-12-12 | 2019-12-12 | Intelligent regulation and control device for steam of ground steam injection pipe network of oil field |
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| CN201911273698.3A CN110984935B (en) | 2019-12-12 | 2019-12-12 | Intelligent regulation and control device for steam of ground steam injection pipe network of oil field |
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| CN110984935A CN110984935A (en) | 2020-04-10 |
| CN110984935B true CN110984935B (en) | 2024-06-18 |
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| CN118065821B (en) * | 2024-04-25 | 2024-07-09 | 克拉玛依三盛有限责任公司 | Stress deformation prevention repairing mechanism for multi-wheel steam injection of thickened oil well |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN211524790U (en) * | 2019-12-12 | 2020-09-18 | 中国石油化工股份有限公司 | Intelligent steam regulation and control device for oil field ground steam injection pipe network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CH358096A (en) * | 1958-03-12 | 1961-11-15 | Sulzer Ag | Process for regulating the output temperatures at superheaters in a steam generator system and equipment for carrying out the process |
| US9200799B2 (en) * | 2013-01-07 | 2015-12-01 | Glasspoint Solar, Inc. | Systems and methods for selectively producing steam from solar collectors and heaters for processes including enhanced oil recovery |
| CN203214031U (en) * | 2013-04-23 | 2013-09-25 | 中国石油化工股份有限公司 | Device for distributing, regulating and controlling and metering flow and dryness of wet steam on ground surface of oil field |
| CN203214028U (en) * | 2013-04-23 | 2013-09-25 | 中国石油化工股份有限公司 | Device for regulating and controlling flow of wet steam on ground surface of oil field |
| CN105626020B (en) * | 2014-11-07 | 2018-08-14 | 中国石油化工股份有限公司 | Adjustable steam volume control device |
| CN105569625B (en) * | 2014-11-10 | 2018-03-16 | 中国石油化工股份有限公司 | Underground steam flow mass dryness fraction distributes regulation device |
| CN104535121B (en) * | 2014-12-31 | 2017-09-12 | 西安交通大学 | A kind of adjustable critical flow venturi nozzle of throat area with aditus laryngis runner |
| CN106481323B (en) * | 2015-09-02 | 2023-10-20 | 中国石油化工股份有限公司 | Wet steam flow dryness distribution regulation and control device and method |
| CN106437652B (en) * | 2016-08-26 | 2019-03-08 | 新疆华隆油田科技股份有限公司 | Steam allocation metering regulating device and its application method are injected in viscous crude production |
| RU2661952C1 (en) * | 2017-08-30 | 2018-07-23 | Андрей Владиславович Ковалев | Method of thermal-mining development of deposits of high-viscosity oil mine workings and device for implementation the same |
| CN207499859U (en) * | 2017-11-10 | 2018-06-15 | 中国石油集团渤海石油装备制造有限公司 | A kind of mass dryness fractions distributors such as uphole steam generator steam multistage mixed phase |
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| CN211524790U (en) * | 2019-12-12 | 2020-09-18 | 中国石油化工股份有限公司 | Intelligent steam regulation and control device for oil field ground steam injection pipe network |
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