CN201196080Y - Three-phase flow meter - Google Patents
Three-phase flow meter Download PDFInfo
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- CN201196080Y CN201196080Y CNU2008201081434U CN200820108143U CN201196080Y CN 201196080 Y CN201196080 Y CN 201196080Y CN U2008201081434 U CNU2008201081434 U CN U2008201081434U CN 200820108143 U CN200820108143 U CN 200820108143U CN 201196080 Y CN201196080 Y CN 201196080Y
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000000203 mixture Substances 0.000 claims abstract description 29
- 238000005259 measurement Methods 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims description 13
- FVAUCKIRQBBSSJ-UHFFFAOYSA-M sodium iodide Chemical compound [Na+].[I-] FVAUCKIRQBBSSJ-UHFFFAOYSA-M 0.000 claims description 9
- 230000005284 excitation Effects 0.000 claims description 7
- 239000013078 crystal Substances 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 5
- 230000002285 radioactive effect Effects 0.000 claims description 4
- 238000005260 corrosion Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 235000009518 sodium iodide Nutrition 0.000 claims description 3
- BKVIYDNLLOSFOA-UHFFFAOYSA-N thallium Chemical compound [Tl] BKVIYDNLLOSFOA-UHFFFAOYSA-N 0.000 claims description 3
- 229910052716 thallium Inorganic materials 0.000 claims description 3
- 239000012530 fluid Substances 0.000 abstract description 19
- 239000003990 capacitor Substances 0.000 abstract 1
- 238000001514 detection method Methods 0.000 abstract 1
- 239000012071 phase Substances 0.000 description 79
- 230000000694 effects Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000036962 time dependent Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005251 gamma ray Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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Abstract
The utility model relates to a three-phase flow metering device, comprising a main pipe for transmitting an object oil-gas-fluid mixture, a venturi device provided on the main pipe for measuring the fluid flow on the main pipe for measuring fluid flow in the main pipe, an electrical conductivity measurement sensor provided in the main pipe for measuring gas phase score ratio of small bubbles, oil phase score ratio, gas phase score ratio and fluid phase score ratio, gas flow speed and fluid flow speed, a capacitor measurement sensor provided in the main pipe for measuring gas phase score ratio of large and small bubbles, oil phase score ratio, gas phase score ratio, fluid phase score ratio, gas flow speed and fluid flow speed, and a gamma density meter provided in the main pipe for measuring the density of the mixture. The three-phase flow metering device can accurately measure the water content of condensate oil of a high pressure condensate gas well and realize gas well online detection, thus is practical.
Description
Technical field
The utility model relates to a kind of flow measurement device of field of petroleum exploitation, particularly relates to a kind of oil gas water and does not separate three-phase flow measuring device.
Background technology
At present, in the development process of high pressure gas condensate field, the problem that always exists the water content in the condensate accurately to measure.The condensate gas central treating station adopts the mode of gas-liquid separator, flow meter and analytical test to carry out oil-gas-water metering usually.Big (the 2000m of Tarim Basin high pressure condensate gas well gas-oil ratio
3More than/the t), big (the nearly 0.4t/m of profit density contrast
3) etc. characteristics, existing technological process is difficult to get representational profit aggregate sample, can not grasp individual well moisture content and variation tendency, can't correctly carry out oil reservoir development dynamic analysis and development plan and adjust in good time, have a strong impact on the in time supporting of effect of reservoir development and oil gas treatment system.Simultaneously, because measurement of water-content coefficient is inaccurate, can't effectively take anticorrosive measure.
This shows that above-mentioned existing oil gas water flow measurement system obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.The design people is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, actively studied innovation, in the hope of founding a kind of three-phase flow measuring device of new structure, can improve general existing oil gas water flow measurement system, make it have more practicality.
The utility model content
Main purpose of the present utility model is, overcome the defective that existing oil-gas-water three phase flow quantity measuring system exists, and provide a kind of new three-phase flow measuring device, technical problem to be solved is to make it can accurately measure high pressure condensate gas well condensate water content, realize oil gas well on-line monitoring, thereby be suitable for practicality more, and have the value on the industry.
The purpose of this utility model and solve its technical problem and realize by the following technical solutions.According to a kind of three-phase flow measuring device that the utility model proposes, be used to measure the flow of oil gas water, it comprises: trunk line is used to carry measured oil gas aqueous mixtures; Venturi is arranged on the trunk line, is used to measure the flow of trunk line inner fluid; Conductivity measurement sensors is arranged in the trunk line, is used to measure gas phase fraction, each phase phase fraction of oil gas water, gas and the flow rate of liquid of minute bubbles; Capacitance measuring sensor is arranged in the trunk line, is used to measure gas phase fraction, each phase phase fraction of oil gas water, gas and the flow rate of liquid of large and small bubble; And the gamma densometer, be arranged in the trunk line, be used to measure the density of mixture.
The purpose of this utility model and solve its technical problem and also can be applied to the following technical measures to achieve further.
Aforesaid three-phase flow measuring device, wherein said conductivity measurement sensors comprise and setting gradually along the mixture flow direction: emission electrode, the backup electrode group that is made of two small electrodes, the working electrode group and the exploring electrode that are made of two small electrodes.
Aforesaid three-phase flow measuring device, the spacing of two small electrodes of wherein said working electrode group is 65mm; The spacing of two small electrodes of described backup electrode group is 65mm.
Aforesaid three-phase flow measuring device, wherein said capacitance measuring sensor comprise and setting gradually along the mixture flow direction: first electrode, first small electrode, excitation variable winding, second small electrode and second largest electrode; Wherein, first electrode and second largest electrode constitute the large electrode group, and first small electrode and second small electrode constitute the 3rd small electrode group.
Aforesaid three-phase flow measuring device, the spacing of two large electrodes of wherein said large electrode group is 165mm, two small electrode spacings of described the 3rd small electrode group are 65mm, and the 3rd small electrode group is arranged between two large electrodes of this large electrode group.
Aforesaid three-phase flow measuring device, wherein said gamma densometer is made of emitter and receiving system two parts; This emitter is made of radioactive source, plumbous box, mechanical shutter and corrosion resistant plate; This receiving system is made of receiving crystal, photomultiplier and electronics amplifier unit.
Aforesaid three-phase flow measuring device, wherein said receiving crystal are that sodium iodide adds thallium.
By technique scheme, the utility model three-phase flow measuring device has following advantage at least:
The three-phase flow measuring device that the utility model proposes, can online in real time measure oil gas aquatic products amount, can accurately measure individual well moisture content and variation tendency, help monitoring the oil gas well condition of production, for the diagnosis of ill production status provides accurate data information, avoid the generation of abnormal conditions such as water breakthrough, has channeling and serious obstruction, meet the become more meticulous requirement of operation of oil field.
In sum, the three-phase flow measuring device of the utility model special construction, it has above-mentioned many advantages and practical value, and in like product, do not see have similar structure design to publish or use and really genus innovation, no matter it structurally or bigger improvement all arranged on the function, have large improvement technically, and produced handy and practical effect, and more existing oil gas water flow measurement system has the multinomial effect of enhancement, thereby be suitable for practicality more, and have the extensive value of industry, really be a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solutions of the utility model, for can clearer understanding technological means of the present utility model, and can be implemented according to the content of manual, below with preferred embodiment of the present utility model and conjunction with figs. describe in detail as after.
Description of drawings
Fig. 1 is the structural representation of the utility model three-phase flow measuring device embodiment.
Fig. 2 is the structural representation of the capacitance measuring sensor of three-phase flow measuring device.
Fig. 3 is the structural representation of the conductivity measurement sensors of three-phase flow measuring device.
The specific embodiment
For further setting forth the utility model is to reach technological means and the effect that predetermined utility model purpose is taked, below in conjunction with accompanying drawing and preferred embodiment, to according to its specific embodiment of three-phase flow measuring device, structure, feature and the effect thereof that the utility model proposes, describe in detail as after.
Seeing also shown in Figure 1ly, is the structural representation of three-phase flow measuring device embodiment of the present utility model.This three-phase flow measuring device, be used to measure the flow of individual well oil gas water, this three-phase flow measuring device 100 comprises: the trunk line 110 that fuel feeding gas-vapor mix material flow is moving, and be arranged on gamma density meter 120, capacitance measuring sensor 130, conductivity measurement sensors 140 and Venturi 150 on the trunk line 110.The principle of the measurement mixture of oil, water and gas of this three-phase flow measuring device is that individual well comes the oil gas aqueous mixtures to be assumed to be four phase fluids, i.e. oil, water, discrete gas and free gas.Air pocket flow velocity identical with gas flow rate (air pocket is discrete gas), minute bubbles flow velocity identical with flow rate of liquid (minute bubbles are free gas), it is identical with aqueous phase flow rate vertically to measure the interior oil phase flow velocity of pipeline section.
If: Q: volume flow dose rate, A: volume phase fraction, v: flow velocity
Q＝A×V (1)
The volume phase fraction equals the product of phase fraction and measuring tube cross-sectional area, because the measuring tube cross-sectional area is known, the calculating of each phase flow rate rate of oil gas water can be exchanged into phase fraction and each calculating of flow velocity mutually.
Described gamma densometer 120 is used to calculate the density of oil gas aqueous mixtures, it is made of emitter and receiving system two parts, emitter mainly is made of parts such as radioactive source, plumbous box, mechanical shutter and corrosion resistant plates, and receiving system mainly contains receiving crystal (sodium iodide adds thallium), photomultiplier and electronics amplifier unit and constitutes.The gamma-rays bump receiving crystal that radioactive source produces, can produce 1 electronics after each gamma-rays particle hits, electronics obtains energy through the high voltage electric field of photomultiplier, accelerated motion, finally caught by the electronics amplifier unit, and with the electron amount of electric impulse signal by receiving under the counter records.During operate as normal, gamma-rays enters in the pipeline by shutter, owing to have fluid to flow in the pipeline, oil gas water can the absorption portion gamma-rays, but the degree that absorbs has nothing in common with each other, and receiving system can be measured and receive gamma-ray quantity in the unit interval this moment.Utilize empirical formula, calculate the hybrid density of fluid.
Seeing also shown in Figure 2ly, is the structural representation of the capacitance measuring sensor 130 of described three-phase flow measuring device.This capacitance measuring sensor 130 is used to measure gas phase fraction, each phase phase fraction of oil gas water, gas and the flow rate of liquid of the large and small bubble that hangs down aqueous fluid.This capacitance measuring sensor 130 comprises and setting gradually along the mixture flow direction: first electrode, first small electrode, excitation variable winding 131, second small electrode and second largest electrode; Wherein, first electrode and second largest electrode formation large electrode group 132, the first small electrodes and second small electrode constitute the 3rd small electrode group 133.The spacing of two large electrodes of this large electrode group 132 is 165mm, two small electrode spacings of described the 3rd small electrode group 133 are 65mm, and the 3rd small electrode group 133 is arranged between two large electrodes of this large electrode group, and excitation variable winding 131 is between first small electrode and second small electrode.These excitation variable winding 131 excitation voltage signals, signal is successively by the 3rd small electrode group 133 and large electrode group 132, the signal of telecommunication that the 3rd small electrode group 133 record minute bubbles cause, the signal of telecommunication that large electrode group 132 record air pockets cause, voltage signal be measured and record in addition during through each electrode.According to the functional relation of voltage and dielectric constant, can draw out the time dependent curve of dielectric constant, this curve of integration can be calculated the average phase fraction of size bubble preset time.
Calculate each phase phase fraction of oil gas water
Capacitivity equation: ε
Mixture=f (α ε
Gas, β ε
Water, γ ε
Oil) (2-1)
Density equation: ρ
Mixture=f (α ρ
Gas, β ρ
Water, γ ρ
Oil) (3)
Normalizing equation: alpha+beta+γ=1 (4)
In the formula:
ε
Mixture: mixture capacitivity (can calculate) by magnitude of voltage
ε
Gas: gas phase capacitivity (known)
ε
Water: water capacitivity (known)
ε
Oil: oil phase capacitivity (known)
ρ
Mixture: mixture density (gamma densimeter measurement value can be calculated)
ρ
Gas: density of gas phase (known)
ρ
Water: water density (known)
ρ
Oil: oil phase density (known)
α: gas phase phase fraction (the unknown)
β: water phase fraction (the unknown)
γ: oil phase phase fraction (the unknown)
Three unknown numbers of three equations, simultaneous solution can obtain gas phase phase fraction, water phase fraction and oil phase phase fraction.
Calculate gas and flow rate of liquid
Seeing also shown in Figure 3ly, is the structural representation of the conductivity measurement sensors of the utility model three-phase flow measuring device.This conductivity measurement sensors 140 is arranged in the trunk line 110, is used to calculate gas phase fraction, each phase phase fraction of oil gas water, gas and the flow rate of liquid of minute bubbles.This conductivity measurement sensors 140 comprises and setting gradually along the mixture flow direction: emission electrode 141, the backup electrode group 142 that is made of two small electrodes, the working electrode group 143 and the exploring electrode 144 that are made of two small electrodes.The spacing of two small electrodes of described working electrode group 143 is 65mm; The spacing of two small electrodes of described backup electrode group 142 is 65mm.Emission electrode 141 emission voltage signals, signal moves from bottom to up with fluid, passes through backup electrode group 142, working electrode group 143 and exploring electrode 144 successively.Measured and the record in addition of voltage signal during through two electrode groups.According to the functional relation of voltage and dielectric constant, can draw out the time dependent curve of dielectric constant, this curve of integration can be calculated the average phase fraction of minute bubbles preset time.
Calculate each phase phase fraction of oil gas water
Electrical conductivity equation: σ
Mixture=f (α σ
Gas, β σ
Water, γ σ
Oil) (2-2)
Density equation: ρ
Mixture=f (α ρ
Gas, β ρ
Water, γ ρ
Oil) (3)
Normalizing equation: alpha+beta+γ=1 (4)
In the formula:
σ
Mixture: conductivity of mixture (can calculate) by magnitude of voltage
σ
Gas: gas phase electrical conductivity (known)
σ
Water: water electrical conductivity (known)
σ
Oil: oil phase electrical conductivity (known)
ρ
Mixture: mixture density (gamma densimeter measurement value can be calculated)
ρ
Gas: density of gas phase (known)
ρ
Water: water density (known)
ρ
Oil: oil phase density (known)
α: gas phase phase fraction (the unknown)
β: water phase fraction (the unknown)
γ: oil phase phase fraction (the unknown)
Three unknown numbers of three equations, simultaneous solution can obtain gas phase phase fraction, water phase fraction and oil phase phase fraction.
Calculate gas and flow rate of liquid
Emission electrode emission voltage signal, the measured and record in addition of voltage signal during through small electrode.After a period of time, two time dependent curves of some voltages of each self-forming of small electrode of working electrode group are done computing cross-correlation to these curves, if when drawing maximum, what can think that two small electrodes measure is same fluid.This time corresponding T of maximum occurs and think that promptly same logistics moves to the back required time of one electrode from last electrode, at this moment V
Gas(V
Liquid)=d/T=0.065/T.(d is the distance between the small electrode, known d=0.065m).
The conversion of capacitance measuring sensor and conductance measurement sensor
Conductivity measurement sensors has an exploring electrode, the signal of telecommunication that the continual measurement of this electrode receives, and it is converted into electrical conductivity, (electrical conductivity of vacant duct is 1 when electrical conductivity reaches 30 left and right sides, oil-overflow pipeline electrical conductivity is 2～2.3, and water-filled pipeline electrical conductivity is saturation value 〉=35), (moisture is 65%～75%), capacitance measuring sensor quits work, and conductivity measurement sensors is started working.
Described Venturi 150 is used to measure liquid phase flow rate.This Venturi becomes the fluid pressure difference of certain relation to measure fluid flow by measuring with flow, utilizes the pressure that produces before and after the fluid throttling to change and measures.
In the formula:
M: liquid quality flow
E: penalty coefficient
C: discharge coefficient (c=f (Re
D, β)
Re
D: the Reynolds coefficient
β: Venturi tube trunnion internal diameter/Venturi tube internal diameter
γ: level pressure thermal capacitance/constant volume thermal capacitance
ε: sampling factor (ε=f (dP/P, beta, gamma)
ρ: fluid density
A: Wen's trunnion passes through area
DP: fluid is by differential pressure before and after the Venturi tube
When capacitance measuring sensor or conductivity measurement sensors cross-correlation calculation flow velocity, when the cross-correlation success rate is on the low side (being that the cross-correlation calculation success rate is lower than minimum permissible value), the liquid phase flow rate that the Venturi of winning the confidence measures.
The technology contents that the application does not describe in detail all can find corresponding scheme in the prior art, so do not repeat them here.
The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, though the utility model discloses as above with preferred embodiment, yet be not in order to limit the utility model, any those skilled in the art, in not breaking away from the technical solutions of the utility model scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solutions of the utility model, according to technical spirit of the present utility model to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solutions of the utility model.
Claims (7)
1. three-phase flow measuring device is characterized in that comprising:
Trunk line is used to carry measured oil gas aqueous mixtures;
Venturi is arranged on the trunk line, is used to measure the flow of mixture in the trunk line;
Conductivity measurement sensors is arranged in the trunk line, is used to measure gas phase fraction, each phase phase fraction of oil gas water, gas and the flow rate of liquid of minute bubbles;
Capacitance measuring sensor is arranged in the trunk line, is used to measure gas phase fraction, each phase phase fraction of oil gas water, gas and the flow rate of liquid of large and small bubble; And
The gamma densometer is arranged in the trunk line, is used to measure the density of mixture.
2. three-phase flow measuring device according to claim 1 is characterized in that wherein said conductivity measurement sensors comprises to set gradually along the mixture flow direction: emission electrode, the backup electrode group that is made of two small electrodes, the working electrode group and the exploring electrode that are made of two small electrodes.
3. three-phase flow measuring device according to claim 2, the spacing that it is characterized in that two small electrodes of wherein said working electrode group is 65mm; The spacing of two small electrodes of described backup electrode group is 65mm.
4. three-phase flow measuring device according to claim 1 is characterized in that wherein said capacitance measuring sensor comprises to set gradually along the mixture flow direction: first electrode, first small electrode, excitation variable winding, second small electrode and second largest electrode; Wherein, first electrode and second largest electrode constitute the large electrode group, and first small electrode and second small electrode constitute the 3rd small electrode group.
5. three-phase flow measuring device according to claim 4, the spacing that it is characterized in that two large electrodes of wherein said large electrode group is 165mm, two small electrode spacings of described the 3rd small electrode group are 65mm, and the 3rd small electrode group is arranged between two large electrodes of this large electrode group.
6. three-phase flow measuring device according to claim 1 is characterized in that wherein said gamma densometer is made of emitter and receiving system two parts; This emitter is made of radioactive source, plumbous box, mechanical shutter and corrosion resistant plate; This receiving system is made of receiving crystal, photomultiplier and electronics amplifier unit.
7. three-phase flow measuring device according to claim 6 is characterized in that wherein said receiving crystal is that sodium iodide adds thallium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201081434U CN201196080Y (en) | 2008-05-23 | 2008-05-23 | Three-phase flow meter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201081434U CN201196080Y (en) | 2008-05-23 | 2008-05-23 | Three-phase flow meter |
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|---|---|
| CN201196080Y true CN201196080Y (en) | 2009-02-18 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101280680B (en) * | 2008-05-23 | 2012-06-27 | 安东石油技术（集团）有限公司 | Three-phase flow measuring device |
| US9188471B2 (en) | 2014-04-22 | 2015-11-17 | King Fahd University Of Petroleum And Minerals | Two-phase flow sensor using cross-flow-induced vibrations |
| CN105866182A (en) * | 2016-04-11 | 2016-08-17 | 中国石油天然气股份有限公司 | On-line observation and measurement device based on pumping well |
| CN108252706A (en) * | 2018-02-08 | 2018-07-06 | 天津大学 | A kind of oil well low yield liquid highly aqueous water two-phase flow measurement method |
| CN110058046A (en) * | 2019-04-23 | 2019-07-26 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | A kind of fluid flow rate measurement method and device based on convective heat transfer |
| CN115290504A (en) * | 2022-08-01 | 2022-11-04 | 中国石油大学(华东) | Hybrid oil-water mixture detection sensor |
-
2008
- 2008-05-23 CN CNU2008201081434U patent/CN201196080Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101280680B (en) * | 2008-05-23 | 2012-06-27 | 安东石油技术（集团）有限公司 | Three-phase flow measuring device |
| US9188471B2 (en) | 2014-04-22 | 2015-11-17 | King Fahd University Of Petroleum And Minerals | Two-phase flow sensor using cross-flow-induced vibrations |
| CN105866182A (en) * | 2016-04-11 | 2016-08-17 | 中国石油天然气股份有限公司 | On-line observation and measurement device based on pumping well |
| CN108252706A (en) * | 2018-02-08 | 2018-07-06 | 天津大学 | A kind of oil well low yield liquid highly aqueous water two-phase flow measurement method |
| CN110058046A (en) * | 2019-04-23 | 2019-07-26 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | A kind of fluid flow rate measurement method and device based on convective heat transfer |
| CN110058046B (en) * | 2019-04-23 | 2021-02-12 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | A method and device for measuring fluid flow rate based on convection heat transfer |
| CN115290504A (en) * | 2022-08-01 | 2022-11-04 | 中国石油大学(华东) | Hybrid oil-water mixture detection sensor |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Tian Gang Inventor after: Bu Zhihu Inventor after: Wu Zongyi Inventor after: Ji WC Inventor before: Tian Gang Inventor before: Bu Zhihu Inventor before: Wu Zongyi |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: TIAN GANG; BU ZHIHU; WU ZONGYI TO: TIAN GANG; BU ZHIHU; WU ZONGYI; JI WANCHENG |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090218 Termination date: 20160523 |