CN105505346A - Water-based drilling fluid for low-temperature formation drilling - Google Patents
Water-based drilling fluid for low-temperature formation drilling Download PDFInfo
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- CN105505346A CN105505346A CN201510906128.9A CN201510906128A CN105505346A CN 105505346 A CN105505346 A CN 105505346A CN 201510906128 A CN201510906128 A CN 201510906128A CN 105505346 A CN105505346 A CN 105505346A
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- 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
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- 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
- C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
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- 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
- C09K2208/22—Hydrates inhibition by using well treatment fluids containing inhibitors of hydrate formers
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- 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
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- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention relates to a water-based drilling fluid for low-temperature formation drilling. The technical solution of the invention is that the water-based drilling fluid is prepared with the following components in parts by weight: 100 parts of water, 0 to 4 parts of mixing soil, 0.1 to 5 parts of flow pattern regulator, 1 to 8 parts of shale inhibitor, 0.05 to 0.5 parts of encapsulating and inhibiting agent, 3 to 10 parts of filtrate reducer, 10 to 40 parts of hydrate inhibitor, 1 to 2 parts of lubricant and 0 to 100 parts of barite. The water-based drilling fluid has the following advantages: (1) the drilling fluid disclosed by the invention has good fluidity under the low temperature of negative 5DEG C, the plastic viscosity is less than or equal to 40mPa.s, and the yield point is less than or equal to 25Pa; (2) the drilling fluid disclosed by the invention has good borehole wall stability and filtration and wall-building properties, the swelling rate of clay can be deceased by about 70 to 90 percent, and the highest shale recovery ratio reaches 88.2 percent (21.1 percent for clean water); the API filtration loss is less than or equal to 5mL; (3) the drilling fluid disclosed by the invention has good hydrate inhibition property, and no hydrate is produced after the drilling fluid is mixed for 16 hours under the conditions of negative 5DEG C and 15MPa; (4) the lubricating coefficient of the drilling fluid disclosed by the invention is less than 0.1, which can meet the requirement of drilling operation.
Description
Technical field
The present invention relates to a kind of oil and gas exploitation drilling fluid, particularly a kind of low temperature formation drilling water base drilling fluid, is applied to the water-base drilling fluid of ocean deepwater and tundra low temperature formation.
Background technology
Ocean deepwater oil gas and natural gas hydrate resources enrich, and have a high potential; Tundra is richly stored with natural gas hydrate resources equally.Compared with land or well drilling of shallow sea, ocean deepwater and tundra very low temperature strata drilling are faced with many special technical problems, require that drilling fluid must have following characteristics: the low temperature rheological behaviour that (1) is good.Along with the increase of the depth of water, seawater temperature is more and more lower, and the Gulfian, China South Sea and marine site, West Africa bottom-water temperature are minimum is 2 ~ 4 DEG C.Low temperature causes drilling fluid viscosity, shear force significantly rises, and significant gelling phenomenon even appears in oil base drilling fluid, causes too high equivalent circulating density, causes the problems such as leakage.And Beihai area minimum temperature reaches-5 DEG C, tundra formation temperature also can be low to moderate about-5 DEG C.Ultra-low temperature surroundings proposes huge challenge to drilling fluid rheology.(2) generation of gas hydrate is effectively suppressed.Very easily cause forming gas hydrate in drilling fluid, obstruction conduit and preventer etc. in deep-water subsea or tundra cryogenic high pressure environment, cause serious security incident.(3) effectively deep water superficial part unconsolidated formation or stratum, tundra borehole well instability is suppressed.(4) good leak-off building capacity and oilness.
Oil base/synthetic base drilling fluid has excellent inhibition and stability, be the first-selection of troublesome zone drilling, but it gelling can occur under low temperature drilling condition, cannot normal circulation.Therefore, low temperature formation drilling well needs to use water-base drilling fluid.But the water-base drilling fluid of routine is difficult to the borehole well instability problem solving deep water superficial part unconsolidated formation, and under cryogenic high pressure condition, gas hydrate inhibition is poor, is difficult to meet deep water and tundra low temperature formation drilling engineering technical requirements.
Research report both at home and abroad for drilling fluid low temperature rheological characteristics is more, but only has 1 to the patent of invention of deep water and tundra low temperature formation (-5 DEG C even lower) drilling fluid system development aspect.
Chinese patent literature publication number is 103834371A, patent name is " a kind of frozen soil layer or the severe cold area probing calcium of resistance to very low temperature base low solids fluid ", is made up of 100 parts, water, 10 ~ 30 parts, calcium chloride, multi-functional recombiner 1 ~ 10 part, viscosity-depression agent 0.5 ~ 2.0 part, fluid loss agent 0.1 ~ 10 part, lubricant 1 ~ 5 part, defoamer 1 ~ 3 part.This drilling fluid plastic viscosity at-5 DEG C is 15mPas, and API filtration is 5.0mL, at-35 DEG C, still have mobility.But this drilling fluid is only evaluated rheological and is optimized, and does not consider the over-all propertieies such as borehole wall stability, hydrate inhibition and filtration property.Realize rig-site utilization, drilling fluid must have good rheological, leak-off, borehole wall stability, hydrate inhibition etc.
Summary of the invention
Object of the present invention is exactly in view of the foregoing defects the prior art has, provides a kind of low temperature formation drilling water base drilling fluid, has good rheological and hydrate inhibition under cryogenic; Filter loss is low; Can effective stabilizing borehole; There is good lubricity.
Its technical scheme is that the component comprising following weight part is made:
100 parts, water, native 0 ~ 4 part with slurry, flow pattern regulator 0.1 ~ 5 part, shale control agent 1 ~ 8 part, wraps suppressed dose 0.05 ~ 0.5 part, fluid loss agent 3 ~ 10 parts, hydrate inhibitor 10 ~ 40 parts, lubricant 1 ~ 2 part, 0 ~ 100 part, barite;
Wherein, soil with slurry adopts at least one in sodium bentonite and calcium-base bentonite;
Flow pattern regulator adopts at least one in drilling fluid xanthan gum, viscoelastic surfactant and tannin viscosity-depression agent;
Wrap suppressed dose and adopt at least one in partially hydrolyzed polyacrylamide, cationic polyacrylamide;
Shale control agent is at least one in polyoxyethylene glycol, ethylene glycol and glycerol multipolymer and Repone K;
Fluid loss agent is in Polyanionic Cellulose, sulfonated lignite, starch and sulfonated phenol formaldehyde resin at least two kinds;
Hydrate inhibitor is at least one in sodium-chlor and ethylene glycol;
Lubricant is at least one in vegetable oil esters series lubricant agent, tensio-active agent series lubricant agent and mineral oil.
Preferably, above-mentioned viscoelastic surfactant is at least one in cetyl trimethylammonium bromide and palmityl trimethyl ammonium chloride.
The present invention compared with prior art has following beneficial effect:
1, drilling fluid of the present invention has good mobility under-5 DEG C of low temperature, plastic viscosity≤40mPas, yield value≤25Pa;
2, drilling fluid of the present invention has good borehole wall stability and leak-off building capacity, and clay swell rate can be reduced about 70 ~ 90%, it is 21.1% that shale recovery ratio is up to 88.2%(clear water); API filtration≤5mL;
3, drilling fluid of the present invention has good hydrate inhibition ,-5 DEG C, can ensure that drilling fluid stirs 16h anhydrate and generates under 15MPa condition;
4, drilling fluid lubricating coefficient < 0.1 of the present invention, can meet drilling operation requirement.
Embodiment
Embodiment 1: preparation seawater base deepwater drilling liquid system, the component comprising following weight part is made:
Soil with slurry adopts sodium bentonite 3kg; Shale control agent adopts polyoxyethylene glycol 3kg and KCl5kg; Flow pattern regulator adopts xanthan gum 0.2kg and viscoelastic surfactant palmityl trimethyl ammonium chloride 0.5kg; Wrap suppressed dose and adopt cationic polyacrylamide 0.1kg; Fluid loss agent adopts Polyanionic Cellulose and starch, wherein: Polyanionic Cellulose 0.5kg; Starch 2.5kg; Lubricant adopts vegetable oil esters series lubricant agent SD-505:1kg; Hydrate inhibitor adopts NaCl:10kg; Seawater is designated as 100kg.
Embodiment 2:
Preparation free clay phase seawater base deepwater drilling liquid system, comprises the component of following weight percent:
Soil with slurry adopts sodium bentonite 0kg; Shale control agent adopts polyoxyethylene glycol 3kg; Wrap suppressed dose and adopt partially hydrolyzed polyacrylamide 0.2kg; Flow pattern regulator adopts xanthan gum 0.4kg; Fluid loss agent adopts Polyanionic Cellulose 0.5kg; Starch 1.5kg; Sulfonated phenol formaldehyde resin 4kg; Hydrate inhibitor adopts NaCl:20kg; Mineral oil 2kg; Barite 20kg; Seawater is designated as 100kg.
Embodiment 3: preparation seawater base deepwater drilling liquid system, the component comprising following weight part is made:
Soil with slurry adopts calcium-base bentonite 4kg; Shale control agent adopts polyoxyethylene glycol 0.3kg and Repone K 0.7kg; Flow pattern regulator adopts xanthan gum 2kg and viscoelastic surfactant palmityl trimethyl ammonium chloride 3kg; Wrap suppressed dose and adopt cationic polyacrylamide 0.5kg; Fluid loss agent adopts Polyanionic Cellulose and starch, wherein: Polyanionic Cellulose 3kg; Starch 7kg; Lubricant adopts vegetable oil esters series lubricant agent SD-505:1kg; Hydrate inhibitor adopts NaCl:40kg; Seawater is designated as 100kg.
Embodiment 4: preparation seawater base deepwater drilling liquid system, the component comprising following weight part is made:
Soil with slurry adopts sodium bentonite 2kg; Shale control agent adopts ethylene glycol 1kg and glycerol multipolymer 2kg; Flow pattern regulator adopts tannin viscosity-depression agent 0.1kg; Wrap suppressed dose and adopt cationic polyacrylamide 0.05kg; Fluid loss agent adopts Polyanionic Cellulose and starch, wherein: Polyanionic Cellulose 3kg; Starch 7kg; Lubricant adopts tensio-active agent series lubricant agent 2kg; Hydrate inhibitor adopts ethylene glycol 10kg; Seawater is designated as 100kg.
Embodiment 5: preparation seawater base deepwater drilling liquid system, the component comprising following weight part is made:
Soil with slurry adopts calcium-base bentonite 4kg; Shale control agent adopts polyoxyethylene glycol 0.3kg and Repone K 1.7kg; Flow pattern regulator adopts xanthan gum 2kg and viscoelastic surfactant cetyl trimethylammonium bromide 3kg; Wrap suppressed dose and adopt cationic polyacrylamide 0.1kg; Fluid loss agent adopts sulfonated lignite 3kg; Lubricant adopts vegetable oil esters series lubricant agent SD-505:2kg; Hydrate inhibitor adopts ethylene glycol: 30kg; Seawater is designated as 100kg.
Below the effect of drilling fluid prepared by embodiment 1-5 is tested.
1, drilling fluid low temperature rheological behaviour and leak-off
Test under-5 DEG C and 10 DEG C of conditions drilling fluid 120 DEG C/16h heat roll after rheological and leak-off, in table 1.Result shows, drilling fluid of the present invention has good rheological at-5 DEG C and 10 DEG C, the serious thickening of low temperature even gelling does not occur, can meet deepwater drilling technical requirements.API filtration < 5mL, has good leak-off building capacity.
Table 1 drilling fluid rheology index
2, shale inhibition
Tested by shale expansion and rolled dispersion experiment, test drilling fluid suppresses that shale hydration expands, dispersive ability, in table 2.Result shows, drilling fluid of the present invention has good suppression Shale Hydration expansion, dispersion effect.
Table 2 drilling fluid shale inhibition test result
Note: the rate of recovery of rock sample in clear water is 21.1%
3, gas hydrate inhibition
By gas hydrate inhibition valuator device, simulate deep-water subsea cryogenic high pressure environment (-5 DEG C, 15MPa), test the gas hydrate inhibition of drilling fluid of the present invention.Result shows, drilling fluid of the present invention still finds no gas hydrate and generates after stirring 16h, show that it has excellent gas hydrate inhibition.
The above, be only part preferred embodiment of the present invention, any those of ordinary skill in the art all may utilize the technical scheme correct of above-mentioned elaboration or are revised as equivalent technical scheme.Therefore, any simple modification of carrying out according to technical scheme of the present invention or substitute equivalents, belong to the scope of protection of present invention to the greatest extent.
Claims (2)
1. a low temperature formation drilling water base drilling fluid, is characterized in that: the component comprising following weight part is made:
100 parts, water, native 0 ~ 4 part with slurry, flow pattern regulator 0.1 ~ 5 part, shale control agent 1 ~ 8 part, wraps suppressed dose 0.05 ~ 0.5 part, fluid loss agent 3 ~ 10 parts, hydrate inhibitor 10 ~ 40 parts, lubricant 1 ~ 2 part, 0 ~ 100 part, barite;
Wherein, soil with slurry adopts at least one in sodium bentonite and calcium-base bentonite;
Flow pattern regulator adopts at least one in drilling fluid xanthan gum, viscoelastic surfactant and tannin viscosity-depression agent;
Wrap suppressed dose and adopt at least one in partially hydrolyzed polyacrylamide, cationic polyacrylamide;
Shale control agent is at least one in polyoxyethylene glycol, ethylene glycol and glycerol multipolymer and Repone K;
Fluid loss agent is in Polyanionic Cellulose, sulfonated lignite, starch and sulfonated phenol formaldehyde resin at least two kinds;
Hydrate inhibitor is at least one in sodium-chlor and ethylene glycol;
Lubricant is at least one in vegetable oil esters series lubricant agent, tensio-active agent series lubricant agent and mineral oil.
2. low temperature formation drilling water base drilling fluid according to claim 1, is characterized in that: described viscoelastic surfactant is at least one in cetyl trimethylammonium bromide and palmityl trimethyl ammonium chloride.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510906128.9A CN105505346A (en) | 2015-12-09 | 2015-12-09 | Water-based drilling fluid for low-temperature formation drilling |
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| CN201510906128.9A CN105505346A (en) | 2015-12-09 | 2015-12-09 | Water-based drilling fluid for low-temperature formation drilling |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106010483A (en) * | 2016-06-08 | 2016-10-12 | 中国海洋石油总公司 | Water-based drilling fluid system and preparation method and application thereof |
| CN106190066A (en) * | 2016-07-07 | 2016-12-07 | 中国石油集团川庆钻探工程有限公司 | Water-based drilling fluid suitable for low well temperature and high formation pressure coefficient |
| CN106753287A (en) * | 2016-11-24 | 2017-05-31 | 中国石油大学(华东) | Ultralow temperature drilling fluid is used in a kind of deep-sea and permafrost region probing |
| CN107663450A (en) * | 2016-07-28 | 2018-02-06 | 安庆五宁精细化工有限责任公司 | A kind of efficient expansion-resisting agent of nonionic |
| CN109233763A (en) * | 2018-10-26 | 2019-01-18 | 中国地质大学（武汉） | A kind of drilling fluid and preparation method thereof for mini pile pore-forming |
| CN109356567A (en) * | 2018-05-04 | 2019-02-19 | 中国石油集团海洋工程有限公司 | Deep water shallow stratum borehole wall stability prediction method |
| CN110105930A (en) * | 2019-04-23 | 2019-08-09 | 上海勃利燃气设备有限公司 | A kind of bentonite drilling fluid and preparation method thereof |
| WO2019153239A1 (en) * | 2018-02-07 | 2019-08-15 | 西南石油大学 | Drilling fluid for inhibiting clay surface hydration and preparation method therefor |
| CN112218932A (en) * | 2018-05-21 | 2021-01-12 | 米尼克斯Crc有限公司 | Drilling fluid and application thereof |
| CN112480881A (en) * | 2020-11-16 | 2021-03-12 | 天津中油渤星工程科技有限公司 | Sea area natural gas hydrate horizontal well drilling fluid and preparation method and application thereof |
| CN114426814A (en) * | 2020-10-12 | 2022-05-03 | 中国石油化工股份有限公司 | Water-based drilling fluid and application thereof |
| CN114437677A (en) * | 2020-10-30 | 2022-05-06 | 中国石油化工股份有限公司 | Drilling fluid and preparation method and application thereof |
| CN116355598A (en) * | 2023-03-30 | 2023-06-30 | 甘肃省水利水电勘测设计研究院有限责任公司 | Low-dosage viscoelastic solid-free water-based drilling fluid and application thereof |
| CN116445139A (en) * | 2022-01-07 | 2023-07-18 | 中国石油天然气集团有限公司 | Low-temperature drilling fluid and preparation method thereof |
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| CN104046337A (en) * | 2014-06-18 | 2014-09-17 | 中国石油集团渤海钻探工程有限公司 | Clean drilling fluid used for coal bed gas multi-branch horizontal well storage layer and preparation method of clean drilling fluid |
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| US20070078061A1 (en) * | 2000-12-29 | 2007-04-05 | Jeff Kirsner | Invert drilling fluids and methods of drilling boreholes |
| CN103146364A (en) * | 2013-02-28 | 2013-06-12 | 中国海洋石油总公司 | Strong-inhibition water-base drilling fluid |
| CN104046337A (en) * | 2014-06-18 | 2014-09-17 | 中国石油集团渤海钻探工程有限公司 | Clean drilling fluid used for coal bed gas multi-branch horizontal well storage layer and preparation method of clean drilling fluid |
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Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106010483A (en) * | 2016-06-08 | 2016-10-12 | 中国海洋石油总公司 | Water-based drilling fluid system and preparation method and application thereof |
| CN106190066A (en) * | 2016-07-07 | 2016-12-07 | 中国石油集团川庆钻探工程有限公司 | Water-based drilling fluid suitable for low well temperature and high formation pressure coefficient |
| CN107663450A (en) * | 2016-07-28 | 2018-02-06 | 安庆五宁精细化工有限责任公司 | A kind of efficient expansion-resisting agent of nonionic |
| CN106753287A (en) * | 2016-11-24 | 2017-05-31 | 中国石油大学(华东) | Ultralow temperature drilling fluid is used in a kind of deep-sea and permafrost region probing |
| CN106753287B (en) * | 2016-11-24 | 2019-04-09 | 中国石油大学(华东) | A kind of deep-sea and permafrost region probing ultralow temperature drilling fluid |
| WO2019153239A1 (en) * | 2018-02-07 | 2019-08-15 | 西南石油大学 | Drilling fluid for inhibiting clay surface hydration and preparation method therefor |
| CN109356567B (en) * | 2018-05-04 | 2022-04-08 | 中国石油集团海洋工程有限公司 | Method for predicting stability of deep water shallow stratum well wall |
| CN109356567A (en) * | 2018-05-04 | 2019-02-19 | 中国石油集团海洋工程有限公司 | Deep water shallow stratum borehole wall stability prediction method |
| CN112218932A (en) * | 2018-05-21 | 2021-01-12 | 米尼克斯Crc有限公司 | Drilling fluid and application thereof |
| CN112218932B (en) * | 2018-05-21 | 2023-08-22 | 米尼克斯Crc有限公司 | Drilling fluid and application thereof |
| CN109233763B (en) * | 2018-10-26 | 2020-01-17 | 中国地质大学（武汉） | Drilling fluid for forming hole in micro pile and preparation method thereof |
| CN109233763A (en) * | 2018-10-26 | 2019-01-18 | 中国地质大学（武汉） | A kind of drilling fluid and preparation method thereof for mini pile pore-forming |
| CN110105930A (en) * | 2019-04-23 | 2019-08-09 | 上海勃利燃气设备有限公司 | A kind of bentonite drilling fluid and preparation method thereof |
| CN110105930B (en) * | 2019-04-23 | 2021-05-07 | 上海勃利燃气设备有限公司 | Bentonite drilling fluid and preparation method thereof |
| CN114426814A (en) * | 2020-10-12 | 2022-05-03 | 中国石油化工股份有限公司 | Water-based drilling fluid and application thereof |
| CN114437677A (en) * | 2020-10-30 | 2022-05-06 | 中国石油化工股份有限公司 | Drilling fluid and preparation method and application thereof |
| CN114437677B (en) * | 2020-10-30 | 2023-03-14 | 中国石油化工股份有限公司 | Drilling fluid and preparation method and application thereof |
| CN112480881B (en) * | 2020-11-16 | 2023-03-07 | 天津中油渤星工程科技有限公司 | Sea area natural gas hydrate horizontal well drilling fluid and preparation method and application thereof |
| CN112480881A (en) * | 2020-11-16 | 2021-03-12 | 天津中油渤星工程科技有限公司 | Sea area natural gas hydrate horizontal well drilling fluid and preparation method and application thereof |
| CN116445139A (en) * | 2022-01-07 | 2023-07-18 | 中国石油天然气集团有限公司 | Low-temperature drilling fluid and preparation method thereof |
| CN116355598A (en) * | 2023-03-30 | 2023-06-30 | 甘肃省水利水电勘测设计研究院有限责任公司 | Low-dosage viscoelastic solid-free water-based drilling fluid and application thereof |
| CN116355598B (en) * | 2023-03-30 | 2024-04-26 | 甘肃省水利水电勘测设计研究院有限责任公司 | Low-dosage viscoelastic solid-free water-based drilling fluid and application thereof |
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Effective date of registration: 20160706 Address after: 100101 Beijing, Beichen West Road, No. 8 Beichen world center, block A, No. 703, No. Applicant after: Chen Erding 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: SINOPEC SHENGLI PETROLEUM ENGINEERING CO., LTD. Applicant before: Drilling Engineering Technology Co., Ltd., Sinopec Victory Petroleum Engineering Co., Ltd. |
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Effective date of registration: 20160729 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: SINOPEC SHENGLI PETROLEUM ENGINEERING CO., LTD. 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: Chen Erding |
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