CN105112026B - 一种钻井液用超高密度微粉体加重剂的制备方法和用途 - Google Patents
一种钻井液用超高密度微粉体加重剂的制备方法和用途 Download PDFInfo
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- CN105112026B CN105112026B CN201510099639.4A CN201510099639A CN105112026B CN 105112026 B CN105112026 B CN 105112026B CN 201510099639 A CN201510099639 A CN 201510099639A CN 105112026 B CN105112026 B CN 105112026B
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- heavy weight
- weight additive
- drilling fluid
- high density
- ultra high
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- 239000000654 additive Substances 0.000 title claims abstract description 99
- 230000000996 additive effect Effects 0.000 title claims abstract description 99
- 238000005553 drilling Methods 0.000 title claims abstract description 80
- 239000012530 fluid Substances 0.000 title claims abstract description 70
- 239000000843 powder Substances 0.000 title claims abstract description 61
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000004094 surface-active agent Substances 0.000 claims abstract description 13
- 239000003960 organic solvent Substances 0.000 claims abstract description 7
- 239000004064 cosurfactant Substances 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims description 19
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 16
- 239000000314 lubricant Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 13
- 229910052708 sodium Inorganic materials 0.000 claims description 13
- 239000011734 sodium Substances 0.000 claims description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- 239000003921 oil Substances 0.000 claims description 11
- 239000013505 freshwater Substances 0.000 claims description 10
- 229920002401 polyacrylamide Polymers 0.000 claims description 9
- 239000003112 inhibitor Substances 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 8
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 8
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical group C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 claims description 5
- 239000004411 aluminium Substances 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 125000003368 amide group Chemical group 0.000 claims description 5
- 229920005601 base polymer Polymers 0.000 claims description 5
- 229920001577 copolymer Polymers 0.000 claims description 5
- 239000004021 humic acid Substances 0.000 claims description 5
- 239000003077 lignite Substances 0.000 claims description 5
- 229920000768 polyamine Polymers 0.000 claims description 5
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 5
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 4
- 150000001412 amines Chemical class 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 3
- 229920001222 biopolymer Polymers 0.000 claims description 3
- 229930195733 hydrocarbon Natural products 0.000 claims description 3
- 150000002430 hydrocarbons Chemical class 0.000 claims description 3
- 239000001103 potassium chloride Substances 0.000 claims description 3
- 235000011164 potassium chloride Nutrition 0.000 claims description 3
- 150000005846 sugar alcohols Polymers 0.000 claims description 3
- 239000001993 wax Substances 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- RCEAADKTGXTDOA-UHFFFAOYSA-N OS(O)(=O)=O.CCCCCCCCCCCC[Na] Chemical compound OS(O)(=O)=O.CCCCCCCCCCCC[Na] RCEAADKTGXTDOA-UHFFFAOYSA-N 0.000 claims description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 2
- NWGKJDSIEKMTRX-AAZCQSIUSA-N Sorbitan monooleate Chemical group CCCCCCCC\C=C/CCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O NWGKJDSIEKMTRX-AAZCQSIUSA-N 0.000 claims description 2
- -1 amido silanol Chemical compound 0.000 claims description 2
- 239000010426 asphalt Substances 0.000 claims description 2
- 239000000440 bentonite Substances 0.000 claims description 2
- 229910000278 bentonite Inorganic materials 0.000 claims description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 2
- 210000000481 breast Anatomy 0.000 claims description 2
- 150000001924 cycloalkanes Chemical class 0.000 claims description 2
- JMGZBMRVDHKMKB-UHFFFAOYSA-L disodium;2-sulfobutanedioate Chemical compound [Na+].[Na+].OS(=O)(=O)C(C([O-])=O)CC([O-])=O JMGZBMRVDHKMKB-UHFFFAOYSA-L 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims description 2
- 238000000053 physical method Methods 0.000 claims description 2
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 claims description 2
- 229920000053 polysorbate 80 Polymers 0.000 claims description 2
- 229910052700 potassium Inorganic materials 0.000 claims description 2
- 239000011591 potassium Substances 0.000 claims description 2
- 238000000746 purification Methods 0.000 claims description 2
- 239000000376 reactant Substances 0.000 claims description 2
- 239000004215 Carbon black (E152) Substances 0.000 claims 1
- 125000000373 fatty alcohol group Chemical group 0.000 claims 1
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 abstract description 9
- 150000001875 compounds Chemical class 0.000 abstract description 5
- 229910052742 iron Inorganic materials 0.000 abstract description 5
- 239000000725 suspension Substances 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract 2
- 239000007864 aqueous solution Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 238000011156 evaluation Methods 0.000 description 12
- 230000020477 pH reduction Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 239000002689 soil Substances 0.000 description 6
- 239000010428 baryte Substances 0.000 description 5
- 229910052601 baryte Inorganic materials 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- LQKOJSSIKZIEJC-UHFFFAOYSA-N manganese(2+) oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[Mn+2].[Mn+2].[Mn+2].[Mn+2] LQKOJSSIKZIEJC-UHFFFAOYSA-N 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 238000004062 sedimentation Methods 0.000 description 5
- 230000005713 exacerbation Effects 0.000 description 4
- 150000002191 fatty alcohols Chemical class 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000010410 dusting Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004945 emulsification Methods 0.000 description 3
- 239000011859 microparticle Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 229920002472 Starch Polymers 0.000 description 2
- ULUAUXLGCMPNKK-UHFFFAOYSA-N Sulfobutanedioic acid Chemical class OC(=O)CC(C(O)=O)S(O)(=O)=O ULUAUXLGCMPNKK-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- SLGWESQGEUXWJQ-UHFFFAOYSA-N formaldehyde;phenol Chemical class O=C.OC1=CC=CC=C1 SLGWESQGEUXWJQ-UHFFFAOYSA-N 0.000 description 2
- 229920001568 phenolic resin Polymers 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 235000007686 potassium Nutrition 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- SCPYDCQAZCOKTP-UHFFFAOYSA-N silanol Chemical compound [SiH3]O SCPYDCQAZCOKTP-UHFFFAOYSA-N 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- RZYKUPXRYIOEME-UHFFFAOYSA-N CCCCCCCCCCCC[S] Chemical compound CCCCCCCCCCCC[S] RZYKUPXRYIOEME-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 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
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling 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
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
- C09K8/18—Clay-containing compositions characterised by the organic compounds
- C09K8/22—Synthetic organic compounds
- C09K8/24—Polymers
-
- 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
- C09K2208/34—Lubricant additives
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)
- Dispersion Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Lubricants (AREA)
Abstract
Description
项目 | 密度/(g/cm3) | 粒径D90/μm | 粒径D50/μm | 酸化率/% |
性能指标 | 6.60 | 28.37 | 13.83 | 94.5 |
项目 | 密度/(g/cm3) | 粒径D90/μm | 粒径D50/μm | 酸化率/% |
性能指标 | 6.60 | 28.37 | 13.83 | 94.5 |
Claims (10)
Priority Applications (1)
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CN201510099639.4A CN105112026B (zh) | 2015-03-07 | 2015-03-07 | 一种钻井液用超高密度微粉体加重剂的制备方法和用途 |
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CN201510099639.4A CN105112026B (zh) | 2015-03-07 | 2015-03-07 | 一种钻井液用超高密度微粉体加重剂的制备方法和用途 |
Publications (2)
Publication Number | Publication Date |
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CN105112026A CN105112026A (zh) | 2015-12-02 |
CN105112026B true CN105112026B (zh) | 2018-07-17 |
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CN201510099639.4A Active CN105112026B (zh) | 2015-03-07 | 2015-03-07 | 一种钻井液用超高密度微粉体加重剂的制备方法和用途 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108774502A (zh) * | 2018-05-17 | 2018-11-09 | 中国海洋石油集团有限公司 | 一种加重体系及其应用、制备方法 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105733527A (zh) * | 2016-04-20 | 2016-07-06 | 西南石油大学 | 一种黑锰矿粉加重高密度钻井液 |
CN109652036A (zh) * | 2019-01-19 | 2019-04-19 | 西南石油大学 | 一种高温高密度高矿化度水基钻井液 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1471388A (zh) * | 2000-08-31 | 2004-01-28 | ˹����ҩƷ���ô�˾ | 磨制颗粒 |
CN101230777A (zh) * | 2007-01-12 | 2008-07-30 | M-I有限公司 | 用于套管钻井的井筒流体 |
CA2694951A1 (en) * | 2007-07-30 | 2009-02-19 | M-I Llc | Insulating annular fluid |
CN101511968A (zh) * | 2006-09-11 | 2009-08-19 | M-I有限公司 | 分散剂包覆的增重剂 |
WO2010126925A2 (en) * | 2009-04-29 | 2010-11-04 | M-I L.L.C. | Wellbore fluids employing sacrificial viscosifiers |
CN102119204A (zh) * | 2008-08-13 | 2011-07-06 | M-I钻井液英国有限公司 | 用微粉化的加重材料降低磨蚀性 |
CN102197107A (zh) * | 2008-08-22 | 2011-09-21 | M-I施沃克诺尔热股份有限公司 | 高性能水基流体 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090258799A1 (en) * | 2008-04-09 | 2009-10-15 | M-I Llc | Wellbore fluids possessing improved rheological and anti-sag properties |
-
2015
- 2015-03-07 CN CN201510099639.4A patent/CN105112026B/zh active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1471388A (zh) * | 2000-08-31 | 2004-01-28 | ˹����ҩƷ���ô�˾ | 磨制颗粒 |
CN101511968A (zh) * | 2006-09-11 | 2009-08-19 | M-I有限公司 | 分散剂包覆的增重剂 |
CN101230777A (zh) * | 2007-01-12 | 2008-07-30 | M-I有限公司 | 用于套管钻井的井筒流体 |
CA2694951A1 (en) * | 2007-07-30 | 2009-02-19 | M-I Llc | Insulating annular fluid |
CN102119204A (zh) * | 2008-08-13 | 2011-07-06 | M-I钻井液英国有限公司 | 用微粉化的加重材料降低磨蚀性 |
CN102197107A (zh) * | 2008-08-22 | 2011-09-21 | M-I施沃克诺尔热股份有限公司 | 高性能水基流体 |
WO2010126925A2 (en) * | 2009-04-29 | 2010-11-04 | M-I L.L.C. | Wellbore fluids employing sacrificial viscosifiers |
Non-Patent Citations (3)
Title |
---|
A New, Alternative Weight Material for Drilling Fluids;Mohamed Al-Bagoury等;《Drilling Conference and Exhibition》;20120308;1-10 * |
超细还原铁粉的生产技术;王运峰;《河南科技》;19940710;17、23 * |
还原废粉作为加重剂的特性研究;吴卫国等;《矿冶工程》;20020831;79-80 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108774502A (zh) * | 2018-05-17 | 2018-11-09 | 中国海洋石油集团有限公司 | 一种加重体系及其应用、制备方法 |
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Effective date of registration: 20160307 Address after: 100101 Beijing, Beichen West Road, No. 8 Beichen world center, block A, No. 703, No. Applicant after: Zhao Guoshan Address before: 100101 Beijing, Beichen West Road, No. 8 Beichen world center, block A, No. 703, No. Applicant before: SINOPEC OILFIELD SERVICE CORPORATION Applicant before: Drilling Engineering Technology Co., Ltd., Sinopec Victory Petroleum Engineering Co., Ltd. |
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Effective date of registration: 20160517 Address after: 100101 Beijing, Beichen West Road, No. 8 Beichen world center, block A, No. 703, No. Applicant after: SINOPEC OILFIELD SERVICE CORPORATION Applicant after: Drilling Engineering Technology Co., Ltd., Sinopec Victory Petroleum Engineering Co., Ltd. Address before: 100101 Beijing, Beichen West Road, No. 8 Beichen world center, block A, No. 703, No. Applicant before: Zhao Guoshan |
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Inventor after: Guo Baoyu Inventor after: Yan Bo Inventor after: Zhang Haiqing Inventor after: Wang Jinli Inventor after: Li Xiuling Inventor after: Cai Yong Inventor after: Wang Qunli Inventor after: Qiu Weiqing Inventor after: Chen Erding Inventor after: Du Zhenchuan Inventor after: Guo Xiangjuan Inventor after: Xu Xiaoshun Inventor after: Yuan Li Inventor before: Guo Baoyu Inventor before: Qiu Weiqing Inventor before: He Xinghua Inventor before: Zhang Nana Inventor before: Du Zhenchuan Inventor before: Sun Dejun Inventor before: Xu Xiaoshun Inventor before: Zhang Li Inventor before: Zhong Chun |
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Effective date of registration: 20180605 Address after: 100101 Beichen West Road, Chaoyang District, Beijing 8 Beichen world center, block A 703. Applicant after: SINOPEC OILFIELD SERVICE CORPORATION Applicant after: SINOPEC SHENGLI PETROLEUM ENGINEERING CO., LTD. Applicant after: Drilling Engineering Technology Co., Ltd., Sinopec Victory Petroleum Engineering Co., Ltd. Address before: 100101 Beichen West Road, Chaoyang District, Beijing 8 Beichen world center, block A 703. Applicant before: SINOPEC OILFIELD SERVICE CORPORATION Applicant before: Drilling Engineering Technology Co., Ltd., Sinopec Victory Petroleum Engineering Co., Ltd. |
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Effective date of registration: 20220222 Address after: 100101 Beichen West Road, Chaoyang District, Beijing 8 Beichen world center, block A 703. Patentee after: SINOPEC OILFIELD SERVICE Corp. Patentee after: SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. Patentee after: SINOPEC SHENGLI PETROLEUM ENGINEERING CO., LTD. DRILLING TECHNOLOGY Research Institute Address before: 100101 Beichen West Road, Chaoyang District, Beijing 8 Beichen world center, block A 703. Patentee before: SINOPEC OILFIELD SERVICE Corp. Patentee before: SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. Patentee before: DRILLING WELL ENGINEERING TECHNOLOGY COMPANY OF SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. |