CN103740351B - Low-density consolidation type sealing agent - Google Patents
Low-density consolidation type sealing agent Download PDFInfo
- Publication number
- CN103740351B CN103740351B CN201310748441.5A CN201310748441A CN103740351B CN 103740351 B CN103740351 B CN 103740351B CN 201310748441 A CN201310748441 A CN 201310748441A CN 103740351 B CN103740351 B CN 103740351B
- Authority
- CN
- China
- Prior art keywords
- low
- density
- content
- sealing agent
- leakage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007596 consolidation process Methods 0.000 title claims abstract description 15
- 238000007789 sealing Methods 0.000 title claims abstract description 12
- 238000005553 drilling Methods 0.000 claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 18
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 16
- 239000011521 glass Substances 0.000 claims abstract description 15
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 15
- 229920001222 biopolymer Polymers 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000011324 bead Substances 0.000 claims abstract description 8
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 8
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 8
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 8
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 8
- 238000007667 floating Methods 0.000 claims abstract description 8
- 239000010881 fly ash Substances 0.000 claims abstract description 8
- 235000012054 meals Nutrition 0.000 claims abstract description 8
- 238000002360 preparation method Methods 0.000 claims abstract description 8
- JHJUUEHSAZXEEO-UHFFFAOYSA-M sodium;4-dodecylbenzenesulfonate Chemical compound [Na+].CCCCCCCCCCCCC1=CC=C(S([O-])(=O)=O)C=C1 JHJUUEHSAZXEEO-UHFFFAOYSA-M 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 8
- 239000000126 substance Substances 0.000 claims abstract description 8
- 229920001285 xanthan gum Polymers 0.000 claims description 7
- 229940082509 xanthan gum Drugs 0.000 claims description 7
- 235000010493 xanthan gum Nutrition 0.000 claims description 7
- 239000000230 xanthan gum Substances 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 5
- 235000019994 cava Nutrition 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 16
- 239000002002 slurry Substances 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 101100084595 Caenorhabditis elegans pam-1 gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/426—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells for plugging
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
- C09K8/467—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement containing additives for specific purposes
- C09K8/473—Density reducing additives, e.g. for obtaining foamed cement compositions
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/04—Hulls, shells or bark containing well drilling or treatment fluids
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Sealing Material Composition (AREA)
Abstract
A kind of Low-density consolidation type sealing agent, its composition and content are weight portion: calcium carbonate 10 20；Conch meal 10 20；Flyash 20 30；Floating bead 10 20；Hollow glass ball 10 20；Dodecylbenzene sodium sulfonate 0.1 1；XC biopolymer 0.5 1；Polyacrylamide PAM 0.5 1；Calcium hydroxide 15.By above-mentioned substance by its component and content, add in reactor, mix 68 hours in normal pressure, 40 55 DEG C of condition stirrings, be subsequently adding in exsiccator, treat that it dry, pulverize into 0.01mm 0.3mm powdered preparations.The low adjustable extent of environmentally safe of the present invention, density is wide, shut-off capacity is strong, good flowing properties, and there is certain coagulability, high in low pressure and leakmess formation leak stopping success rate, craft science is simple, construction safety, extensively applies in oil, geological drilling technique, it is particularly suitable for application in low pressure leakage formation leakage leak stopping, broken formation and large fracture, Caves leakage stratum.
Description
Technical field
The present invention relates to drilling plugging agent, particularly to a kind of Low-density consolidation type sealing agent.
Background technology
In oil drilling, bore chance thief formation and add bridging material, clear water frequently with diesel oil bentonite slurry, common leak stopping slurry
Add the method leak stopping of bridging material, although these blocking methods solve temporarily leakage, but have the disadvantage that or not simultaneously
Foot: 1. leak stopping pulp density high density adjustable space is little, is difficult to solve a leakage difficult problem for low-pressure stratum；It is 2. low due to strata pressure,
Leak stopping pulp density is high-leveled and difficult to adjust, and causes blocking construction difficulty big, and plugging time is long, misses increasingly severe；The most above-mentioned leak stopping
Method to some mesolow power leakage stratum leak stopping have certain effect, when run into low-pressure stratum, long open hole low pressure leakage time without
Method solves；4. when adding inert material, can increase density, the leak stopping slurry adding bridging material is difficult to be trapped in leakage channel
In, have impact on plugging effect.5. plugging time is long, and density can be more and more higher, and leakage can be increasingly severe, causes being repeated several times leakage
Lose, cause great economic loss.
Summary of the invention
It is an object of the invention to provide a kind of Low-density consolidation type sealing agent, use leak stopping pulp density low, miss in low pressure
Being prone in passage be detained, have some strength and have the sealing agent of leakproof leakage function after condensation, density adjustable extent is wide, permissible
Different pressures according to leakage stratum adjusts the density of leak stopping slurry.Efficiently against or avoid lacking present in above-mentioned existing leak stopping
Point or not enough, is effectively improved plugging effect, shortens drilling period, improves rate of penetration.
Low-density consolidation type sealing agent of the present invention, its composition and content, content is weight portion: calcium carbonate 10-
20；Conch meal 10-20；Flyash 20-30；Floating bead 10-20；Hollow glass ball 10-20；Dodecylbenzene sodium sulfonate 0.1-
1；XC biopolymer 0.5-1；Polyacrylamide PAM 0.5-1；Calcium hydroxide 1-5.
Compound method: by above-mentioned substance by its component and content, adds in reactor, in normal pressure, 40-55 DEG C of condition stirring
Mix 6-8 hour, be subsequently adding in exsiccator, treat that it dry, pulverize into 0.01mm-0.3mm powdered preparations.
Wherein, the granularity of described hollow glass ball is 5-125 μm.Described raw XC thing polymer is drilling fluid xanthan gum.
The present invention has the advantage that or beneficial effect compared with existing bridging-off agent:
1, leak stopping pulp density adjusts space greatly, and retention performance is good, and shut-off capacity is strong, and leak stopping success rate is high；
2, the density of leak stopping slurry can be adjusted according to Different Strata pressure；
3, can accommodate a large amount of loss circulation material, density does not raises, and still has and is detained shut-off capacity very well；
4, when low pressure leakage stratum blocking construction, low-density leak stopping slurry is more easy to be trapped in leakage channel, can reduce leakage
Mistake degree, improves leak stopping success rate.
5, under low-density state, good with other sealing agent compatibility, enter in the leakage channel of leakage crack, improve closure
Bearing capacity.
6, range is wide, can be used for the blocking construction in low-pressure stratum and in stratum in debt, adapts to hard formation simultaneously
The blocking construction of large, medium and small crack Caves formation leakage.
7, nontoxic, environmentally safe, operates safety, does not results in down-hole complex accident.
Detailed description of the invention:
A kind of Low-density consolidation type sealing agent, its composition and content, content is weight portion: calcium carbonate 10-20；Conch meal
10-20；Flyash 20-30；Floating bead 10-20；Hollow glass ball 10-20；Dodecylbenzene sodium sulfonate 0.1-1；XC biology gathers
Compound 0.5-1；Polyacrylamide PAM 0.5-1；Calcium hydroxide 1-5.
Compound method: by above-mentioned substance by its component and content, adds in reactor, in normal pressure, 40-55 DEG C of condition stirring
Mix 6-8 hour, be subsequently adding in exsiccator, treat that it dry, pulverize into 0.01mm-0.3mm powdered preparations.Wherein, described
The granularity of hollow glass ball is 5-125 μm.XC biopolymer is drilling fluid xanthan gum.
During use, the Low-density consolidation type of the 2%-15% present invention adding plugging drilling fluid total amount in plugging drilling fluid is blocked up
Leakage agent.
Specific embodiment be given below:
1st example
Calcium carbonate 10；Conch meal 10；Flyash 20；Floating bead 10；Hollow glass ball 10；Dodecylbenzene sodium sulfonate
0.1；XC biopolymer 0.5；Polyacrylamide PAM 0.5；Calcium hydroxide 1.By above-mentioned substance by its component and content, add
Enter in reactor, mix 6 hours in normal pressure, 40 DEG C of condition stirrings, be subsequently adding in exsiccator, treat that it dry, pulverize into
0.01mm powdered preparations.
The granularity of hollow glass ball is 5 μm.Described XC biopolymer is drilling fluid xanthan gum.
During use, plugging drilling fluid adds the Low-density consolidation type leak stopping of the present invention of plugging drilling fluid total amount 2%
Agent.
2nd example
Calcium carbonate 14；Conch meal 14；Flyash 23；Floating bead 104；Hollow glass ball 14；Dodecylbenzene sodium sulfonate
0.5；XC biopolymer 0.7；Polyacrylamide PAM 0.7；Calcium hydroxide 3.By above-mentioned substance by its component and content, add
Enter in reactor, mix 7 hours in normal pressure, 45 DEG C of condition stirrings, be subsequently adding in exsiccator, treat that it dry, pulverize into
0.13mm powdered preparations.The granularity of hollow glass ball is 80 μm.Described XC biopolymer is drilling fluid xanthan gum
During use, plugging drilling fluid adds the Low-density consolidation type leak stopping of the present invention of plugging drilling fluid total amount 8%
Agent.
3rd example
Calcium carbonate 20；Conch meal 20；Flyash 30；Floating bead 20；Hollow glass ball 20；Dodecylbenzene sodium sulfonate 1；
XC biopolymer 1；Polyacrylamide PAM 1；Calcium hydroxide 5.Compound method: by above-mentioned substance by its component and content,
Add in reactor, mix 8 hours in normal pressure, 55 DEG C of condition stirrings, be subsequently adding in exsiccator, treat that it dry, pulverize into
0.3mm powdered preparations.The granularity of hollow glass ball is 125 μm.Described XC biopolymer is drilling fluid xanthan gum
During use, plugging drilling fluid adds the Low-density consolidation type leak stopping of the present invention of plugging drilling fluid total amount 15%
Agent.
4th example
Calcium carbonate 18；Conch meal 18；Flyash 26；Floating bead 18；Hollow glass ball 18；Dodecylbenzene sodium sulfonate
0.8；XC biopolymer 0.9；Polyacrylamide PAM 0.9；Calcium hydroxide 4.Compound method: by above-mentioned substance by its component
And content, add in reactor, mix 6 hours in normal pressure, 50 DEG C of condition stirrings, be subsequently adding in exsiccator, treat that it is dried, powder
It is broken into 0.1mm powdered preparations.The granularity of hollow glass ball is 90 μm.Described XC biopolymer is drilling fluid xanthan gum
During use, plugging drilling fluid adds the Low-density consolidation type leak stopping of the present invention of plugging drilling fluid total amount 12%
Agent.
1st example, the 2nd example, the 3rd example are embodiment, and the 4th example is comparative example, have plugging effect very in using at the scene.
Claims (3)
1. a Low-density consolidation type sealing agent, its composition and content, content is weight portion:
Calcium carbonate 10-20；
Conch meal 10-20；
Flyash 20-30；
Floating bead 10-20
Hollow glass ball 10-20
Dodecylbenzene sodium sulfonate 0.1-1
XC biopolymer 0.5-1；
Polyacrylamide PAM 0.5-1
Calcium hydroxide 1-5
Compound method: by above-mentioned substance by its component and content, adds in reactor, in normal pressure, 40-55 DEG C of condition stirring mixing
6-8 hour, it is subsequently adding in exsiccator, treats that it dry, pulverize into 0.01mm-0.3mm powdered preparations.
Low-density consolidation type sealing agent the most according to claim 1, it is characterised in that the granularity of described hollow glass ball is
5-125μm。
The most according to claim 1, Low-density consolidation type sealing agent, it is characterised in that described XC biopolymer is drilling well
Liquid xanthan gum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310748441.5A CN103740351B (en) | 2013-12-31 | 2013-12-31 | Low-density consolidation type sealing agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310748441.5A CN103740351B (en) | 2013-12-31 | 2013-12-31 | Low-density consolidation type sealing agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103740351A CN103740351A (en) | 2014-04-23 |
| CN103740351B true CN103740351B (en) | 2016-08-17 |
Family
ID=50497420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310748441.5A Active CN103740351B (en) | 2013-12-31 | 2013-12-31 | Low-density consolidation type sealing agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103740351B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104529339B (en) * | 2015-01-14 | 2016-09-14 | 重庆三峡学院 | A kind of polypropylene cross-linked copolymer fiber concrete leak stopping slurry |
| CN104946218A (en) * | 2015-06-09 | 2015-09-30 | 西南石油大学 | Water plugging technology for salt well |
| CN106047320B (en) * | 2016-06-08 | 2018-09-14 | 北京科麦仕油田化学剂技术有限公司 | A kind of high-strength tensile sealing agent |
| CN109796943A (en) * | 2019-02-28 | 2019-05-24 | 青岛海石元创石油技术有限公司 | Drilling fluid fractured reservoir high resiliency, Gao Kangwen sealing agent and preparation method thereof |
| CN110734750A (en) * | 2019-12-20 | 2020-01-31 | 山东华越天成石油技术有限责任公司 | leak-proof leak-stopping density regulator |
| CN110872500A (en) * | 2019-12-20 | 2020-03-10 | 山东华越天成石油技术有限责任公司 | Asphalt layer leakage plugging slurry |
| CN111040748B (en) * | 2019-12-20 | 2022-05-17 | 东营泰尔石油技术有限公司 | Low-density high-bridge plug plugging slurry |
| CN110903815A (en) * | 2019-12-20 | 2020-03-24 | 东营泰尔石油技术有限公司 | High-strength leakage-stopping slurry |
| CN110951471A (en) * | 2019-12-20 | 2020-04-03 | 山东华越天成石油技术有限责任公司 | Coagulation plugging slurry |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101649193A (en) * | 2009-06-18 | 2010-02-17 | 东营泰尔石油技术有限公司 | Compressible highly flexible plugging agent |
| CN101671551A (en) * | 2009-06-17 | 2010-03-17 | 东营泰尔石油技术有限公司 | Multifunctional connecting bridging agent |
| CN101671550A (en) * | 2009-06-17 | 2010-03-17 | 东营泰尔石油技术有限公司 | Hard compound reinforcing bridging agent |
| CN101693827A (en) * | 2009-06-17 | 2010-04-14 | 东营泰尔石油技术有限公司 | Coagulation composite sealing agent |
| CN102618234A (en) * | 2011-03-30 | 2012-08-01 | 中国石油化工集团公司 | High sulfur-containing gas well gas testing commissioning operation temporary plugging agent |
-
2013
- 2013-12-31 CN CN201310748441.5A patent/CN103740351B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101671551A (en) * | 2009-06-17 | 2010-03-17 | 东营泰尔石油技术有限公司 | Multifunctional connecting bridging agent |
| CN101671550A (en) * | 2009-06-17 | 2010-03-17 | 东营泰尔石油技术有限公司 | Hard compound reinforcing bridging agent |
| CN101693827A (en) * | 2009-06-17 | 2010-04-14 | 东营泰尔石油技术有限公司 | Coagulation composite sealing agent |
| CN101649193A (en) * | 2009-06-18 | 2010-02-17 | 东营泰尔石油技术有限公司 | Compressible highly flexible plugging agent |
| CN102618234A (en) * | 2011-03-30 | 2012-08-01 | 中国石油化工集团公司 | High sulfur-containing gas well gas testing commissioning operation temporary plugging agent |
Non-Patent Citations (3)
| Title |
|---|
| 惰性堵漏材料及其试验装置通过科研成果验收;刘家孝;《探矿工程(岩土钻掘工程)》;19820625(第06期);65 * |
| 胜利油田化学堵水技术及其分析;宁廷伟;《油田化学》;19880701(第02期);156-163 * |
| 贝壳渣――聚丙烯酰胺泥浆堵漏;胜利油田河口指挥部;《石油勘探与开发》;19770829(第04期);48-50 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103740351A (en) | 2014-04-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103740351B (en) | Low-density consolidation type sealing agent | |
| CN103740341B (en) | The agent of leak stopping pressure-bearing | |
| CN101649193B (en) | Compressible highly flexible plugging agent | |
| CN103773334B (en) | Leak stopping toughener | |
| CN109097011B (en) | Capsule type expansion body based on ground temperature heating and method for blocking formation leakage and improving formation bearing capacity of capsule type expansion body | |
| CN105298438B (en) | More fine profile control methods in round polymer gel deep | |
| CN103773335B (en) | Acidificable consolidation type plugging agent | |
| CN108587586B (en) | A kind of pressurization sealing drilling fluid | |
| CN103740340B (en) | Expansion consolidation type plugging agent | |
| CN105733533B (en) | The thin pons hematoma agent of the molten type mineral fibres of acid and leakage-stop liquid and preparation method thereof | |
| CN105733532B (en) | Thick pons hematoma agent and leakage-stop liquid and preparation method thereof in the molten type mineral fibres of acid | |
| CN103834375B (en) | A kind of Oil/gas Well temporary plugging agent based on magnetic flow liquid and preparation method thereof and application | |
| CA2713715A1 (en) | Lost circulation material formulation and method of use | |
| CA2696388A1 (en) | Compositions and methods for inhibiting lost circulation during well operations | |
| CN109705827A (en) | Oil drilling leak stopping pressure-bearing agent and preparation method thereof | |
| CN103937471A (en) | Temperature-resistance drilling fluid drill-feeding plugging agent and its preparation method | |
| CN105505352B (en) | Plugging agent for high-sulfur-content gas well | |
| CN101086210A (en) | Profile control and water plugging technology for coal bed gas | |
| CN103740348A (en) | Leaking stoppage reinforcing agent | |
| CN106479466A (en) | A kind of profile-controlling and plugging agent and its preparation method and application | |
| CN103773340B (en) | High strength consolidation type plugging agent | |
| CN107603574A (en) | A kind of drilling water base sealing agent and its application method | |
| CN102191025A (en) | Broad-spectrum deformable while-drilling leak-proof sealing agent | |
| CN103756656B (en) | Static gelling leakage-stopping liquid for stopping malignant leakage | |
| WO2021113056A1 (en) | Methods and materials for reducing lost circulation in a wellbore |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Sui Yuehua Inventor after: Zhang Zhenhong Inventor after: Guan Fang Inventor after: Gao Jinliang Inventor after: Liu Aiguo Inventor after: Zhu Yixin Inventor after: Tian Jun Inventor after: Kong Defeng Inventor after: Sui Yongquan Inventor after: Lu Kanghua Inventor before: Sui Yuehua Inventor before: Zhu Yixin Inventor before: Tian Jun Inventor before: Kong Defeng Inventor before: Sui Yongquan Inventor before: Lu Kanghua Inventor before: Zhang Zhenhong Inventor before: Fu Hong Inventor before: Guan Fang Inventor before: He Weiguo Inventor before: Li Ke Inventor before: Liu Xianghua Inventor before: Liu Kesheng Inventor before: Wang Baotian Inventor before: Gao Jinliang Inventor before: Liu Aiguo |