CN203547694U - Steam generator for thickened oil recovery of petroleum - Google Patents
Steam generator for thickened oil recovery of petroleum Download PDFInfo
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- CN203547694U CN203547694U CN201320582605.7U CN201320582605U CN203547694U CN 203547694 U CN203547694 U CN 203547694U CN 201320582605 U CN201320582605 U CN 201320582605U CN 203547694 U CN203547694 U CN 203547694U
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Abstract
The utility model discloses a steam generator for thickened oil recovery of petroleum. The steam generator structurally comprises a cylinder, a dual-ring cyclone, a flame tube, a water film generator and an evaporation converter. The dual-ring cyclone, the flame tube, the water film generator and the evaporation converter are sequentially and coaxially arranged in the cylinder along the gas flowing direction. An end cap provided with a fuel-gas inlet connecting pipe and a pressure-air inlet connecting pipe is fixed at the air inlet end of the cylinder. Pressure air is divided into an internal vortex and an external vortex by the double-ring cyclone fixedly arranged at the flamed tube, the internal vortex and the external vortex enter internal and external space of the flame tube respectively, the pressure air entering the flame tube is mixed and combusted with fuel gas to form a flame flow, a part of the pressure air entering an annular runner between the flame tube and the cylinder flows into the flame flow through a through-flow hole in the wall surface of the flame tube, and most of the pressure air entering the annular runner flows out from an outlet. The water film generator is composed of at least one circle of pressure water nozzles arranged on the inner wall of the cylinder. The evaporation converter is a section of runner, and an inner cavity of the runner firstly shrinks gradually and then expands gradually. The steam generator has the advantages of reasonable structure, high reliability, long service life, energy conservation and high efficiency.
Description
Technical field
The utility model relates to the Technology of Heavy Oil Recovery in oil exploitation, more specifically, relates to a kind of steam generator for heavy crude petroleum exploitation.
Background technology
Thickened oil recovery in oil exploitation, is mainly heat exploitation at present, and the mode of heat exploitation mainly contains steam soak and two kinds of methods of steam drive.These two kinds of methods all need be at surface construction steam station boiler, by pipeline by under high temperature and high pressure steam input well, by underground full-bodied oil extraction.The major defect of these two kinds of methods has:
1. thermal losses is large.Its thermal losses mainly contains: the heat waste that steam station boiler and smoke stack emission produce accounts for 20%, steam station to the heat waste that well head produces accounts for 3%-20%(average 13%), the heat waste that well head produces to oil reservoir accounts for and is greater than 20% (2000 feet/609 meters of well depths).In order to reduce the thermal losses to oil reservoir of environment pollution and well head, when american petroleum industry is defined in well depth and exceedes 2500 feet (762 meters), just do not allow and use with upper type.But, all underground below 2500 feet of the whole world 95% viscous crude storage.Therefore traditional steam soak and steam drive method have significant limitation to the exploitation of viscous crude.
2. the exploitation cycle is long.A vexed well cycle of steam soak method, the whole exploitation cycle, about 15 days, and can not produce continuously, needs the vexed well of steam injection repeatedly conventionally about 2～7 days, and production efficiency is not high; Although steam drive can be exploited continuously, the cycle of steam injection is still longer.
3. the mobility of whole equipment is poor.The installation of steam station boiler, need build basis is installed on the ground large, once steam station boiler is set up, is irremovable, is therefore difficult to adapt to the requirement of oil well working in dispersion.
4. environment pollution is serious.The flue gas of steam station boiler emission, contains the pollutants such as a large amount of sulfide, nitrogen oxide, particle, not only can bring a large amount of heat waste, and environmental pollution is larger.
In order to overcome above deficiency, developed in recent years a lot of new thermal recovery technology, as gaseous mixture thermal recovery technology: directly by the flue gas of burning together with water vapour under Injection Well, the heat can maximized utilization burning generating, and environment is not almost polluted.In addition, (HASD) driven in the heating steam of horizontal well circuit, SAGD (SAGD), drive and let out mixing (SD+SAGD), handle up+gas drive of horizontal well of many ends (HP+SD), polynary compound send in and out HDCS(horizontal well Horizontal well, oil-soluble visbreaking agent Dissolver, carbon dioxide Carbon dioxide and steam Steam) etc. the thermal recovery technology based on new withdrawal mechanism, also can effectively reduce thickened oil recovery difficulty, improve thickened oil recovery effect, but low existence is as complex operation in various degree, heat exchange loss and steam are carried the deficiencies such as heat waste, thickened oil recovery ability (recovery ratio is lower than 40%) and inefficiency have directly been caused.
In the last few years, the scientific worker of this area is except from thermal recovery systems technology direction is developed new thermal recovery technology, also very focus on implementing the device research and development of these thermal recovery systems technologies, and obtained some steam raising plant technological achievements for heavy crude petroleum thermal recovery.
Publication number is that the patent documentation of CH101067372A discloses a kind of high pressure mixing gas generating means for petroleum thermal recovery gas injection machine, and the combustion chamber of this device is insulation bushing water-cooling structure.Because insulation bushing is directly subject to washing away of thermal-flame, material property needs very high, guarantee carries out normal combustion under the temperature levels of 2000 ℃ of left and right, and lining has cooling water outward, make thermal stress level very high, there is to larger impact in the life-span of equipment, cooling water is also easy fouling at high temperature, the passage that stops up water, easily causes equipment failure.The range of atomization of this equipment adopts small structure, and flow field resistance is large, and flow losses are higher.
Publication number is the atomising device that the patent documentation of CH102268984A discloses a kind of composite heat carrier generator, the combustion chamber of this device is in fact still boiler combustion mode, its head of combustion chamber adopt insulation bushing and between lining the mode of logical cooling water carry out cooling, during equipment work, thermal stress is large, affects service life of equipment.In addition, its type of cooling has determined that flame temperature can not be too high, and combustion velocity is also restricted, and its thermal efficiency can be too not high.This device improves fuel atomizer, but structure is too complicated.
Utility model content
The deficiency existing for the heavy crude petroleum steam for thermal recovery generating means of prior art, the purpose of this utility model aim to provide a kind of rational in infrastructure, reliability is strong, the life-span is long, the steam generator for heavy crude petroleum exploitation of efficient energy-saving, to realize the recovery ratio that improves heavy crude petroleum in current heavy crude heat extraction technical foundation, energy conservation.
Above-mentioned purpose of the present utility model, can realize by the steam generator for heavy crude petroleum exploitation with following technical proposals.
The steam generator for heavy crude petroleum exploitation that the utility model provides, comprise a cylindrical tube as steam generator shell, the end cap that is designed with gas inlet adapter and pressure air air inlet tube is installed with at cylindrical shell inlet end, in cylindrical shell, along gas flow direction, be coaxially arranged with successively dicyclo cyclone, burner inner liner, moisture film maker and evaporation converter, the inward eddy device of described dicyclo cyclone and outer cyclone are separately positioned on inside and outside the burner inner liner import being suspended in cylindrical shell, the gas inlet adapter outlet being arranged on end cap is connected with burner inner liner inner chamber, the pressure air air inlet tube outlet being arranged on end cap is connected with the pressure air distributor chamber between end cap and dicyclo cyclone, pressure air enters respectively burner inner liner interior or exterior space through inside and outside cyclone, on flame tube wall, be designed with for entering the pressure air in annular channel between burner inner liner and cylindrical shell and enter into the through flow hole in burner inner liner, the described moisture film maker that is positioned at burner inner liner downstream forms by being arranged on the pressure water nozzle of at least one circle on cylinder inboard wall, and pressure water nozzle forms protection moisture film with water outlet direction at cylinder inboard wall and arranges, be positioned at the evaporation converter in moisture film maker downstream, for inner chamber is one section of runner of flaring after first convergent, by fluid contraction, expand and realize water liquid vapour phase and transform.
In technique scheme of the present utility model, described gas inlet is taken over to pay the utmost attention to and is arranged on end cap central authorities, and its outlet is connected with burner inner liner inner chamber by volute in inward eddy device; Described pressure air air inlet tube is at least two, is preferably evenly arranged on the circumference of taking over around gas inlet.
In technique scheme of the present utility model, described burner inner liner is paid the utmost attention to and is designed to save barrel structure, can be formed by least three shell rings, can be by the shell ring as burner inner liner head, as burner inner liner stem portion, be no less than the shell ring of 1 and form as the shell ring of flame drum tail, posterior shell ring by its containing interface containing being connected in previous shell ring outside wall surface.Burner inner liner head is an infundibulate shell ring, and small end connects gas inlet and takes over outlet and the interior whirlpool of inward eddy device wall, and large end connects with back segment shell ring; The region that burner inner liner head surrounds is primary zone, and combustion gas mixes with the internal layer eddy current air rotation that enters primary zone through inward eddy device in this region, lights and produce continuous flame.As the shell ring of burner inner liner stem portion for being designed with containing interface cone shell ring, as the shell ring of flame drum tail for being designed with containing interface direct shell ring.The waveform cavity that burner inner liner head shell ring several sections of shell ring inwalls below surround is burning dilution zone, enter internal layer eddy current air in burner inner liner and constantly participate in burning to maintain combustion intensity, and the effect by air-flow vortex is by metastable flame this regional center that maintains; On each shell ring wall of burner inner liner, be designed with the through flow hole of at least one ring, outer eddy current enters supplementary air in burner inner liner by these through flow holes, the air entering through through flow hole is distributed with guiding and is formed cooling fluid layer by the special Cylinder wall structure of burner inner liner, and flame tube wall is carried out cooling and adds burning.
In technique scheme of the present utility model, described moisture film maker is paid the utmost attention to and is designed to by toroidal membrane, by toroidal membrane, is arranged on jacket casing in cylindrical shell and two circle pressure water nozzles form, and two circle pressure water nozzles lay respectively in two cannelures that the opening that consists of cylindrical shell, jacket casing and toroidal membrane is contrary.The best vertical welding of described toroidal membrane is in jacket casing stage casing, to form two cannelures that opening inverse structure is identical.Be positioned at the pressure water nozzle of identical two cannelures of opening inverse structure, preferably tangentially to spray press water setting.Nozzle direction tangentially, after can being conducive to make High-Pressure Water to enter cannelure, be close to cylinder inboard wall face High Rotation Speed, the High Rotation Speed forming in annular groove and there is certain thickness rotary water film, by two cannelure openings respectively forwards, backwards eddy flow go out, along cylinder inboard wall face, form continuous rotary water film.Rotary water film wraps the flame combustion mixed flow of burner inner liner ejection in whole moisture film protection burning zone region, and isolated axle center high-temperature area directly contacts with cylindrical shell wall.The rotary water film that eddy flow goes out forward attaches cylinder inboard wall and extends to forward burner inner liner exit position, because moisture film velocity component forward reduces rapidly, under gravity and air-flow percussion, drop, part water is sneaked into along in the thermal-flame mixed flow in axle center with steam form, another part water covers with looser water layer on the moisture film of precession forward, with axle center air-flow, constantly through central passage, flow down, below central passage, continue to cover on moisture film backward, finally enter evaporator section.Rotary water film backward extends to the evaporation converter converging transition entrance that forms evaporator section, finally be close to evaporation converter converging transition internal face and rotating the central passage convergence to evaporation converter throat, by evaporation converter divergent segment deceleration diffusion, transform and be evaporated to steam.
In technique scheme of the present utility model, described evaporation converter is paid the utmost attention to cylindrical tube and is become global design, as one section of steam generator shell.After the divergent segment of evaporation converter, connect one section of direct tube section, to stablize vapor stream.The runner that first contracts and expand afterwards that evaporation converter inwall surrounds, the evaporator section of cylindrical shell direct tube section runner composition the utility model steam generator latter linked with it.At evaporator section, the moisture film that moisture film maker generates draws in and assembles in reducing place of evaporation converter converging transition, mixes and accelerates to enter evaporation converter throat, then sprayed by divergent segment horn mouth deceleration diffusion with the high-speed and high-temperature air-flow at center.Moisture film is broken atomization in this process, and the heat that absorbs high-temperature flue gas evaporates rapidly, forms high temperature and high pressure flue gas vapor mixing stream, by the cylindrical tube outlet ejection of steam generator.
Steam generator of the present utility model, on the whole along airflow direction can divide for by dicyclo cyclone and burner inner liner form combustion gas mixing burning zone, the moisture film that formed by moisture film maker protection burning zone and the evaporator section that formed by evaporation converter.Wherein the operating principle of combustion gas mixing burning zone is: combustion gas is taken over and directly entered burner inner liner head by the gas inlet that is positioned at end cap central authorities, pressure air enters the pressure air distributor chamber between end cap and dicyclo cyclone by being arranged on the gas inlet pipe pressure air air inlet tube of at least two around, by the inside and outside cyclone of dicyclo cyclone, be divided into internal layer eddy current and outer eddy current, internal layer eddy current is entered by burner inner liner head, with the gas-flow rotation mixed combustion of being taken over nozzle ejection by gas inlet, form continuous flame combustion gas mixing stream; Outer eddy current enters the toroidal cavity between burner inner liner and cylindrical shell, in the process flowing out in rotation, fraction is entered in flame and is strengthened burning by the through flow hole on flame tube wall, major part formation eddy current air film outside burner inner liner outlet surrounds the flame combustion gas mixing being sprayed by burner inner liner and flows, burner inner liner is being cooled, reduction is heated through the cylindrical shell heat waste time by burner inner liner wall, is beneficial to add combustion-supporting.
The steam generator that the utility model provides does not pollute atmospheric environment, technical concept is very advanced, the pressurization works very well of heating to oil reservoir in heavy crude petroleum oil recovery process, not only eliminated the deficiency of congenerous product in the past, the more important thing is and can be placed in down-hole, steam heat pressure directly acts on oil reservoir, has thoroughly eliminated the thermal losses of steam course of conveying, has greatly promoted the progress of heavy crude petroleum thermal recovery technology.The advantages such as equipment is high with its overall thermal efficiency, the steam injection time is short, reach that viscous crude produced quantity is high, the effect of quality better.
Compared with the steam generator of the steam generator of exploiting for heavy crude petroleum of the present utility model and prior art, sum up and there is following very outstanding advantages and technique effect.
1. the burner inner liner structure that has adopted similar aero-engine due to combustion chamber, combustion intensity is large, and combustion velocity is fast, and efficiency of combustion is high, thereby has dwindled the equipment volume under Same Efficieney, and this device is efficiently moved.Burner inner liner has adopted air film cooling technology simultaneously, can protect reliably combustion chamber flame drum, improves the bulk life time of equipment.
2. inhalant region adopts the adherent mode of moisture film to intake, and can effectively prevent that incrustation scale occluding device from affecting the normal work of equipment and even scrapping, and can carry out cooling protection to urceolus on the one hand, and moisture film absorbs heat for generation of steam on the other hand.
3. shrinkage expansion structure design is adopted in range of atomization, when not stopping up gas channel, makes moisture film fully be broken into little water droplet, can form good atomization condition, and convenient and combustion gas heat exchange generates water vapour.
4. device structure is simple, and volume compact can facilitate the demand of underground work.
Accompanying drawing explanation
Fig. 1 is the structural representation of steam generator of the present utility model.
Shown by reference numeral sign object in accompanying drawing is respectively: 1-gas inlet is taken over; 2-pressure air air inlet tube; 3-end cap; 4-cylindrical tube; 5-dicyclo cyclone; 6-burner inner liner; 7-pressure water nozzle; 8-sleeve; 9-evaporates converter.
The specific embodiment
Below in conjunction with accompanying drawing, provide an embodiment of the present utility model, and the utility model will be further described by embodiment, so that people are to understanding of the present utility model.Specific constructive form of the present utility model is not limited to the described form of structure of following embodiment; the thought that those skilled in the art can disclose according to the utility model is not being paid under the condition of creatively work; also can design other the specific embodiment, but these specific embodiment that go out according to the utility model content design should still belong to protection domain of the present utility model.
Embodiment 1
The structure of the steam generator that the present embodiment is exploited for heavy crude petroleum as shown in Figure 1, comprise a cylindrical tube 4 as steam generator shell, the end cap 3 that is designed with gas inlet adapter 1 and pressure air air inlet tube 2 is installed with at cylindrical tube 4 inlet ends, in cylindrical shell, along gas flow direction, is coaxially arranged with successively dicyclo cyclone 5, burner inner liner 6, moisture film maker and evaporation converter 9.Described gas inlet is taken over 1 and is arranged on end cap 3 central authorities, and described pressure air air inlet tube 2 is designed with 4, is evenly distributed on the circumference of taking over around gas inlet.Described cyclone is the dicyclo cyclone consisting of inward eddy device and outer cyclone.Described burner inner liner 6 is by the infundibulate shell ring as burner inner liner head, be designed with containing 3 taper shell rings of interface and be designed with containing the straight tube shape shell ring of interface and form as flame drum tail as burner inner liner stem portion, and posterior shell ring is nested with and is welded in previous shell ring outside wall surface containing interface by it.Burner inner liner is suspended in cylindrical shell.The inward eddy device of dicyclo cyclone and outer cyclone are separately positioned on inside and outside the import of burner inner liner head shell ring, gas inlet adapter 1 outlet being arranged on end cap is connected with burner inner liner head cavity, pressure air air inlet tube 2 outlets that are arranged on end cap are connected with the pressure air distributor chamber between end cap and dicyclo cyclone, pressure air enters respectively burner inner liner interior or exterior space through inside and outside cyclone, enters the pressure air fraction in annular channel between burner inner liner and cylindrical shell and is entered in burner inner liner by the through flow hole on flame tube wall; The described moisture film maker that is positioned at burner inner liner downstream consists of with the two circle pressure water nozzles 7 that lay respectively at identical two cannelures of opening inverse structure that consist of cylindrical shell, jacket casing and toroidal membrane toroidal membrane, the jacket casing 8 that is arranged on cylindrical shell by toroidal membrane, two circle pressure water nozzles so that ejection press water tangentially arrange.Be positioned at the evaporation converter in moisture film maker downstream, for inner chamber is one section of runner 9 of flaring after first convergent, and the converging transition length of evaporation converter is less than divergent segment length, evaporation converter becomes global design with cylindrical tube, for one section of steam generator shell, after the divergent segment of evaporation converter, connect one section of direct tube section.
Steam generator work running of the present utility model: first pressure air is filled with in the pressure air distributor chamber between end cap 3 and dicyclo cyclone 5 by pressure air air inlet tube 2, is divided into inside and outside two-layer eddy current through dicyclo cyclone 5.Internal layer vortex straight taps into into burner inner liner 6 head primary zones, and takes over the 1 pressure natural gas entering mixing ignition in burner inner liner head through gas inlet.The most of air of outer eddy current enters moisture film protection burning zone through burner inner liner outside, fraction enters burner inner liner inside through the through flow hole of burner inner liner wall.When pressure air enters, pressure water nozzle 7 is opened in cannelure and is injected high-velocity flow, between the flame of centre mixed airflow of moisture film protection burning zone and cylindrical shell 4, forms rotary water film.The flame of burner inner liner ejection and high-temperature gas are at the downward evaporator section entrance that reaches of parcel of rotary water film.Rotary water film arrives reducing place of evaporation converter 9, toward central passage, assemble, then with the central gas stream of high-speed and high-temperature, pour the throat of evaporation converter, further promote speed and the pressure of fluid-mixing, finally, from the ejection of divergent segment horn mouth, water is by complete atomization and absorb heat of vaporization.
Claims (10)
1. the steam generator for heavy crude petroleum exploitation, comprise a cylindrical tube as steam generator shell (4), the end cap (3) that is designed with gas inlet adapter and pressure air air inlet tube is installed with at cylindrical shell inlet end, it is characterized in that, in cylindrical shell, along gas flow direction, be coaxially arranged with successively dicyclo cyclone (5), burner inner liner (6), moisture film maker and evaporation converter, the inward eddy device of described dicyclo cyclone and outer cyclone are separately positioned on inside and outside the burner inner liner import being suspended in cylindrical shell, gas inlet adapter (1) outlet being arranged on end cap is connected with burner inner liner inner chamber, the pressure air air inlet tube outlet being arranged on end cap is connected with the pressure air distributor chamber between end cap and dicyclo cyclone, pressure air enters respectively burner inner liner interior or exterior space through inside and outside cyclone, on flame tube wall, be designed with for entering the pressure air in annular channel between burner inner liner and cylindrical shell and enter into the through flow hole in burner inner liner, the described moisture film maker that is positioned at burner inner liner downstream forms by being arranged at least one circle pressure water nozzle on cylinder inboard wall, and pressure water nozzle forms the setting of protection moisture film with water outlet direction at cylinder inboard wall, be positioned at the evaporation converter in moisture film maker downstream, for inner chamber is one section of runner (9) of flaring after first convergent.
2. the steam generator for heavy crude petroleum exploitation according to claim 1, is characterized in that, described gas inlet is taken over (1) and is arranged on end cap (3) central authorities, and its outlet is connected with burner inner liner inner chamber by volute in inward eddy device.
3. the steam generator for heavy crude petroleum exploitation according to claim 2, is characterized in that, described pressure air air inlet tube is at least two, is distributed on the circumference of taking over around gas inlet.
4. the steam generator for heavy crude petroleum exploitation according to claim 1, is characterized in that, described burner inner liner, for joint barrel structure, consists of at least three shell rings, and posterior shell ring is contained and is connected in previous shell ring outside wall surface containing interface by it.
5. the steam generator for heavy crude petroleum exploitation according to claim 4, is characterized in that, on the shell ring wall of formation burner inner liner, is designed with the through flow hole that is no less than a ring.
6. according to the steam generator for heavy crude petroleum exploitation one of claim 1 to 5 Suo Shu, it is characterized in that, described moisture film maker comprises toroidal membrane, by toroidal membrane, is arranged on jacket casing (8) and the two circle pressure water nozzles in cylindrical shell, and two circle pressure water nozzles lay respectively in contrary two cannelures of the opening consisting of cylindrical shell, jacket casing and toroidal membrane.
7. the steam generator for heavy crude petroleum exploitation according to claim 6, is characterized in that, described toroidal membrane is vertically connected to jacket casing stage casing and forms two identical cannelures of opening inverse structure.
8. the steam generator for heavy crude petroleum exploitation according to claim 7, is characterized in that, is positioned at the pressure water nozzle of cannelure tangentially to spray press water setting.
9. according to the steam generator for heavy crude petroleum exploitation one of claim 1 to 5 Suo Shu, it is characterized in that, described evaporation converter (9) becomes global design with cylindrical tube, is one section of steam generator shell.
10. the steam generator for heavy crude petroleum exploitation according to claim 9, is characterized in that, after the divergent segment of evaporation converter (9), connects one section of direct tube section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320582605.7U CN203547694U (en) | 2013-09-18 | 2013-09-18 | Steam generator for thickened oil recovery of petroleum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320582605.7U CN203547694U (en) | 2013-09-18 | 2013-09-18 | Steam generator for thickened oil recovery of petroleum |
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| CN203547694U true CN203547694U (en) | 2014-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320582605.7U Withdrawn - After Issue CN203547694U (en) | 2013-09-18 | 2013-09-18 | Steam generator for thickened oil recovery of petroleum |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527162A (en) * | 2013-09-18 | 2014-01-22 | 成都发动机（集团）有限公司 | Steam generator used for thickened oil exploitation |
| CN106223910A (en) * | 2016-08-01 | 2016-12-14 | 中嵘能源科技集团有限公司 | Add electromagnetic wave heat air-injection displacement method to oil reservoir injection air, oxygen-enriched oil-breaking |
| CN111810098A (en) * | 2020-07-02 | 2020-10-23 | 重庆科技学院 | Oil pipe suitable for foam drainage gas production of highly deviated well |
-
2013
- 2013-09-18 CN CN201320582605.7U patent/CN203547694U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527162A (en) * | 2013-09-18 | 2014-01-22 | 成都发动机（集团）有限公司 | Steam generator used for thickened oil exploitation |
| CN103527162B (en) * | 2013-09-18 | 2016-10-05 | 成都发动机（集团）有限公司 | Steam generator for heavy crude petroleum exploitation |
| CN106223910A (en) * | 2016-08-01 | 2016-12-14 | 中嵘能源科技集团有限公司 | Add electromagnetic wave heat air-injection displacement method to oil reservoir injection air, oxygen-enriched oil-breaking |
| CN106223910B (en) * | 2016-08-01 | 2018-11-27 | 中嵘能源科技集团有限公司 | Air-injection displacement method is heated to oil reservoir air injection, oxygen-enriched oil-breaking power-up magnetic wave |
| CN111810098A (en) * | 2020-07-02 | 2020-10-23 | 重庆科技学院 | Oil pipe suitable for foam drainage gas production of highly deviated well |
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| C14 | Grant of patent or utility model | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20140416 Effective date of abandoning: 20161005 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |