CN110643338A - Corrosion inhibitor with oil displacement effect - Google Patents
Corrosion inhibitor with oil displacement effect Download PDFInfo
- Publication number
- CN110643338A CN110643338A CN201910989554.1A CN201910989554A CN110643338A CN 110643338 A CN110643338 A CN 110643338A CN 201910989554 A CN201910989554 A CN 201910989554A CN 110643338 A CN110643338 A CN 110643338A
- Authority
- CN
- China
- Prior art keywords
- corrosion inhibitor
- oil
- oil displacement
- water
- parts
- 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.)
- Pending
Links
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
- C09K8/54—Compositions for in situ inhibition of corrosion in boreholes or wells
-
- 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
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/584—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific surfactants
-
- 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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/602—Compositions for stimulating production by acting on the underground formation containing surfactants
Abstract
The invention relates to a corrosion inhibitor with an oil displacement effect, which comprises the following components in parts by mass: 1 part of alkyl phosphonate corrosion inhibitor, 1-2 parts of alkanolamide surfactant, 1-3 parts of carboxyl betaine surfactant and 1-2 parts of tap water. The corrosion inhibitor of the invention enhances the slow release capability and the capability of reducing the oil-water interfacial tension of the existing corrosion inhibitor, can slow down the corrosion of oil field reinjection sewage on metal pipelines and underground pipe columns, has the oil displacement effect, can improve the crude oil recovery ratio of a water injection development oil layer, and avoids ineffective waste caused by the fact that the traditional corrosion inhibitor is injected into the oil layer through pipelines.
Description
Technical Field
The invention relates to the field of corrosion of oil-water gathering and transportation pipelines in oil exploitation, in particular to a corrosion inhibitor with an oil displacement effect.
Background
The corrosion phenomena of the water conveying pipeline on the ground of the oil field and the water injection pipeline of the water injection well are common, and the main reason is that most of sewage comes from the produced water of the stratum of the oil field, the water temperature is high, the mineralization degree is high, and the sewage is rich in various corrosion and scaling type ions and gases. The seriously corroded pipelines and equipment can change in physics, mechanics and performance, the problems of thinning, perforation, puncture and the like of the pipe wall cause the disorder of the whole water injection system, and even the problems of sewage leakage and environmental protection potential safety hazard can occur, so that the harm is great.
As the water conveying pipeline and the water injection pipeline are basically made of metal materials, the metal corrosion inhibitor is added into the reinjection sewage, and the method for avoiding or retarding the corrosion of the reinjection sewage on the pipelines is one of simple, economic and feasible technical means. The metal corrosion inhibitors commonly used at present can be classified into inorganic corrosion inhibitors, organic corrosion inhibitors and polymer corrosion inhibitors according to their chemical components. Wherein the inorganic corrosion inhibitor mainly comprises an oxidative corrosion inhibitor such as chromate, silicate, polyphosphonate and the like, and the corrosion inhibitor forms an insoluble compound on the surface of the metal to passivate the metal. The organic corrosion inhibitor and the polymer corrosion inhibitor achieve the corrosion inhibition effect through the adsorption between metals. Commonly used organic corrosion inhibitors include phosphonic acids (salts), phosphonic carboxylic acids, sulfonated lignins, and some heterocyclic compounds containing nitrogen-oxygen compounds.
The corrosion inhibitor is expensive, and the commonly used corrosion inhibitors such as HEDP hydroxyethylidene diphosphate, ATMP amino trimethylene phosphate, EDTMP ethylene diamine tetramethylene phosphate, DTPMP diethylene triamine pentamethylene phosphate, polyphosphate and the like have no surface activity because the carbon chain is too short. The phosphate slow release agent with the long alkyl chain has slight surface activity, but far reaches the ultralow interfacial tension required by oil displacement, and the slow release performance of the phosphate slow release agent with the long alkyl chain is inferior to that of the conventional slow release agent. After the corrosion inhibitor enters an oil layer, the oil displacement effect cannot be realized in the oil layer, so that waste is caused, namely, the utilization rate in the application process is low, and the economic benefit is poor. The corrosion inhibitor flows through the water conveying and injecting pipeline along with the reinjection water to play a role in protecting the pipeline from corrosion, and finally is injected into the oil layer along with the reinjection sewage, so that the corrosion inhibitor cannot be recycled.
Disclosure of Invention
The invention provides a corrosion inhibitor with an oil displacement function aiming at the related problems in the background technology.
The invention relates to a corrosion inhibitor with an oil displacement effect, which comprises the following components in parts by weight:
1 part of alkyl phosphonate corrosion inhibitor, 1 part of,
1-2 parts of alkanolamide surfactant,
1-3 parts of carboxyl betaine surfactant,
1-2 parts of tap water.
The alkyl phosphonate corrosion inhibitor has certain surface activity, but cannot reach the ultralow interfacial tension required by oil displacement, and can form the ultralow interfacial tension only by being compounded with other surfactants, and the ultralow interfacial tension is obtained by compounding the alkanolamide surfactant, the carboxyl betaine surfactant and the alkyl phosphonate corrosion inhibitor.
The preparation method of the corrosion inhibitor comprises the steps of weighing the required raw material components according to the raw material proportion, and uniformly mixing and stirring tap water, the alkyl phosphate corrosion inhibitor, the alkanolamide surfactant and the carboxyl betaine surfactant in a proper container to obtain the corrosion inhibitor.
Further, the alkyl phosphonate corrosion inhibitor is 1-R-1-methyl ethyl phosphonate or 1-R-1-methyl propyl phosphonate;
wherein R is dodecanamido or C8-C18One of the alkyl groups.
Still further, the 1-R-1-methyl ethyl phosphonate is sodium salt or potassium salt.
Still further, the 1-R-1-methylpropylphosphonate is a sodium salt or a potassium salt.
Further, the alkanolamide surfactant can be one or a combination of lauric acid diethanolamide, palmitic acid diethanolamide, oleic acid diethanolamide, stearic acid diethanolamide and coconut oil diethanolamide.
Further, the carboxyl betaine surfactant can be one or a combination of more of oleic acid amide propyl betaine, lauric acid amide propyl betaine and cocamide propyl betaine.
Furthermore, the use method of the corrosion inhibitor is to use oilfield reinjection water to prepare the corrosion inhibitor, wherein the preparation concentration is 0.1-0.3 per mill; the prepared solution is injected into an oil layer from the water injection pump station, so that a ground pipeline, an underground pipe column and tools behind the water injection pump station can be protected from being corroded by injected water, the water injection and oil displacement effects can be improved after the solution is injected into the oil layer, and the yield of an oil well is increased.
The invention has the beneficial effects that:
compared with the traditional corrosion inhibitor, the corrosion inhibitor with the oil displacement effect has the advantages that the corrosion inhibition effect is enhanced, the oil displacement effect is realized, the crude oil recovery rate of a water-injection oil development layer is improved, and compared with the ineffective waste of the existing corrosion inhibitor injected into the oil layer through a pipeline, the corrosion inhibitor has obvious advantages of utilization rate and economic benefit.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The raw materials used in the invention are all commercial products.
Example 1:
(1) raw materials: sodium 1-dodecanoamide-1-methyl ethyl phosphonate, diethanolamide palmitate and lauric acid amide propyl betaine surfactants are all commercially available industrial products; the experimental water is: on-site water, which is taken from reinjection sewage of a small oil collecting field of a large port oil field, the total mineralization degree of the sewage is 18341mg/L, and the main ion detection result is shown in a table 1; the experimental oil was: crude oil obtained after dehydration and degassing treatment of a certain oil well of a small oil collecting field of a large port oil field.
TABLE 1 Main ion detection results (unit, mg/L) of Small oil field wastewater
(2) Preparation of the corrosion inhibitor: 20g of tap water, 10g of 1-dodecanoamide-1-methyl ethyl phosphonic acid sodium, 10g of palmitic acid diethanolamide and 20g of lauric acid amidopropyl betaine surfactant; the components are mixed and stirred uniformly (without specific adding sequence) in a proper container to obtain a mixed solution, namely the corrosion inhibitor with the oil displacement function.
(3) Evaluating the corrosion rate of the metal hanging piece: the experimental evaluation method is strictly executed according to the oil and gas industry standard SY/T0026-. The experimental temperature is 40 ℃, and the experimental period is 120 h. By adopting a dynamic exposure method, two groups of dynamic water test media are respectively original field water and the field water added with the corrosion inhibitor of the invention with the mass concentration of 0.5 per thousand, and the interval between the field water sampling time and the test time is less than 24 hours. And (3) test results: the corrosion rate of original field water to the metal hanging piece is 0.1526 mm/a; the corrosion rate of the on-site water added with 1 thousandth mass concentration of the corrosion inhibitor disclosed by the invention to the metal hanging piece is 0.0039mm/a, and the requirement of the standard SY/T0026-.
(4) Evaluating the oil displacement capacity: the field water solution of the corrosion inhibitor of the invention with 3 per mill mass concentration is prepared by field water, and the oil-water interfacial tension value is 0.002mN/m by a Texas-500TM rotating drop ultra-low interfacial tension tester (Kenuo, USA), thus the ultra-low interfacial tension required by oil displacement can be achieved.
Example 2:
(1) raw materials: 1-lauroyl-1-methyl sodium propionate, lauric acid diethanolamide and cocamidopropyl betaine surfactants are all commercially available industrial products; the experimental water is: the indexes of field water and water quality are the same as those of the example 1; the experimental oil was: crude oil obtained after dehydration and degassing treatment of a certain oil well of a small oil collecting field of a large port oil field.
(2) Preparation of the corrosion inhibitor: 10g of 1-dodecanamido-1-methyl sodium propionate, 20g of lauric acid diethanolamide, 30g of cocamidopropyl betaine surfactant and 20g of tap water; the components are mixed and stirred uniformly (without specific adding sequence) in a proper container to obtain a mixed solution, namely the corrosion inhibitor with the oil displacement function.
(3) Evaluating the corrosion rate of the metal hanging piece: the experimental evaluation method is strictly executed according to the oil and gas industry standard SY/T0026-. The experimental temperature is 50 ℃, and the experimental period is 120 h. By adopting a dynamic exposure method, two groups of dynamic water test media are respectively original field water and the field water added with the corrosion inhibitor of the invention with the mass concentration of 0.3 per thousand, and the interval between the field water sampling time and the test time is less than 24 hours. And (3) test results: the corrosion rate of original field water to the metal hanging piece is 0.158 mm/a; the corrosion rate of the on-site water added with 1 thousandth mass concentration of the corrosion inhibitor to the metal hanging piece is 0.0054mm/a, and the requirements of standard SY/T0026-;
(4) evaluating the oil displacement capacity: the on-site water solution of the corrosion inhibitor of the invention with 3 per mill mass concentration is prepared by on-site water, and the oil-water interfacial tension value is 0.0005mN/m by using a Texas-500TM rotating drop ultra-low interfacial tension tester (Kenuo, USA), thus the ultra-low interfacial tension required by oil displacement can be achieved.
Example 3:
(1) raw materials: 1-lauroyl-1-methyl sodium propionate, lauric acid diethanolamide and cocamidopropyl betaine surfactants are all commercially available industrial products; the experimental water is: the indexes of field water and water quality are the same as those of the example 1; the experimental oil was: crude oil obtained after dehydration and degassing treatment of a certain oil well of a small oil collecting field of a large port oil field.
(2) Preparation of the corrosion inhibitor: 10g of 1-dodecanamido-1-sodium methyl ethyl phosphonate, 10g of lauric acid diethanolamide, 10g of cocamidopropyl betaine surfactant and 10g of tap water; the components are mixed and stirred uniformly (without specific adding sequence) in a proper container to obtain a mixed solution, namely the corrosion inhibitor with the oil displacement function.
(3) Evaluating the corrosion rate of the metal hanging piece: the experimental evaluation method is strictly executed according to the oil and gas industry standard SY/T0026-. The experimental temperature is 50 ℃, and the experimental period is 120 h. By adopting a dynamic exposure method, two groups of dynamic water test media are respectively original field water and the field water added with the corrosion inhibitor of the invention with the mass concentration of 0.3 per thousand, and the interval between the field water sampling time and the test time is less than 24 hours. And (3) test results: the corrosion rate of original field water to the metal hanging piece is 0.158 mm/a; the corrosion rate of the on-site water added with 1 thousandth mass concentration of the corrosion inhibitor to the metal hanging piece is 0.0054mm/a, and the requirements of standard SY/T0026-;
(4) evaluating the oil displacement capacity: the on-site water solution of the corrosion inhibitor of the invention with 3 per mill mass concentration is prepared by on-site water, and the oil-water interfacial tension value is 0.0005mN/m by using a Texas-500TM rotating drop ultra-low interfacial tension tester (Kenuo, USA), thus the ultra-low interfacial tension required by oil displacement can be achieved.
Comparative example
In the prior art, a common corrosion inhibitor is an organophosphate corrosion inhibitor, specifically tetrasodium hydroxyethylidene diphosphonate (hedp. na 4). Evaluating the corrosion rate of the metal hanging piece: the experimental evaluation method is strictly executed according to the oil and gas industry standard SY/T0026-. The experimental temperature is 50 ℃, and the experimental period is 120 h. By adopting a dynamic exposure method, two groups of dynamic water test media are respectively original field water and the field water added with HEDP. Na4 corrosion inhibitor with the mass concentration of 0.3 per thousand, and the interval between the field water sampling time and the test time is less than 24 hours. And (3) test results: the corrosion rate of original field water to the metal hanging piece is 0.158 mm/a; the corrosion rate of the field water added with the HEDP. Na4 corrosion inhibitor with the mass concentration of 0.3 per thousand to the metal hanging piece is 0.0105mm/a, the requirement of the standard SY/T0026-one 2006 is met, but the corrosion rate is higher than that of the product of the invention, and the slow release effect is not as good as that of the product of the invention; evaluating the oil displacement capacity: preparing a field aqueous solution added with HEDP. Na4 corrosion inhibitor with 0.3 per mill mass concentration, testing the oil-water interfacial tension value to be 26mN/m by using a Texas-500TM rotating drop ultra-low interfacial tensiometer, wherein the oil-water interfacial tension value is far greater than the interfacial tension of the solution, and the oil displacement effect is avoided.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (7)
1. The corrosion inhibitor with the oil displacement effect is characterized by comprising the following components in parts by mass:
1 part of alkyl phosphonate corrosion inhibitor, 1 part of,
1-2 parts of alkanolamide surfactant,
1-3 parts of carboxyl betaine surfactant,
1-2 parts of tap water.
2. The corrosion inhibitor with the oil displacement function of claim 1, wherein the alkyl phosphonate corrosion inhibitor is 1-R-1-methyl ethyl phosphonate or 1-R-1-methyl propyl phosphonate;
wherein R is dodecanamido or C8-C18One of the alkyl groups.
3. The corrosion inhibitor with oil displacement function of claim 1, wherein the 1-R-1-methyl ethyl phosphonate is sodium salt or potassium salt.
4. The corrosion inhibitor with oil displacement function of claim 1, wherein the 1-R-1-methyl propyl phosphonate is sodium salt or potassium salt.
5. The corrosion inhibitor with oil displacement function according to claim 1, wherein the alkanolamide surfactant can be one or more of lauric acid diethanolamide, palmitic acid diethanolamide, oleic acid diethanolamide, stearic acid diethanolamide and coconut oil diethanolamide.
6. The corrosion inhibitor with oil displacement function according to claim 1, wherein the carboxybetaine surfactant can be one or a combination of oleic acid amide propyl betaine, lauric acid amide propyl betaine and cocamide propyl betaine.
7. The corrosion inhibitor with the oil displacement effect according to claim 1, characterized in that the corrosion inhibitor is prepared by oil layer reinjection water with the preparation concentration of 0.1-0.3 ‰.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910989554.1A CN110643338A (en) | 2019-10-17 | 2019-10-17 | Corrosion inhibitor with oil displacement effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910989554.1A CN110643338A (en) | 2019-10-17 | 2019-10-17 | Corrosion inhibitor with oil displacement effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110643338A true CN110643338A (en) | 2020-01-03 |
Family
ID=68994321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910989554.1A Pending CN110643338A (en) | 2019-10-17 | 2019-10-17 | Corrosion inhibitor with oil displacement effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110643338A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112266774A (en) * | 2020-10-20 | 2021-01-26 | 中国石油天然气股份有限公司 | Anti-freezing type corrosion-inhibition bubble-exclusion scale inhibitor and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103254884A (en) * | 2013-05-27 | 2013-08-21 | 上海大学 | High-efficient foam compound flooding agent for tertiary oil recovery and preparation method thereof |
| CN104357039A (en) * | 2014-10-31 | 2015-02-18 | 中国石油化工股份有限公司 | Polymeric microsphere emulsion oil-displacing agent and preparation method thereof |
| CN104449629A (en) * | 2014-10-31 | 2015-03-25 | 中国石油化工股份有限公司 | Emulsion mobility control agent and preparation method thereof |
| CN108018034A (en) * | 2017-12-01 | 2018-05-11 | 北京恒聚化工集团有限责任公司 | A kind of alkali-free binary combination flooding oil systems and preparation method thereof |
| CN109337661A (en) * | 2018-11-19 | 2019-02-15 | 安东石油技术（集团）有限公司 | Low bubble displacement of reservoir oil type irrigation of one kind and its preparation method and application |
| CN109652047A (en) * | 2017-10-12 | 2019-04-19 | 沈阳慧超科技有限公司 | A kind of glucose high-efficient oil-displacing agent and flooding method |
-
2019
- 2019-10-17 CN CN201910989554.1A patent/CN110643338A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103254884A (en) * | 2013-05-27 | 2013-08-21 | 上海大学 | High-efficient foam compound flooding agent for tertiary oil recovery and preparation method thereof |
| CN104357039A (en) * | 2014-10-31 | 2015-02-18 | 中国石油化工股份有限公司 | Polymeric microsphere emulsion oil-displacing agent and preparation method thereof |
| CN104449629A (en) * | 2014-10-31 | 2015-03-25 | 中国石油化工股份有限公司 | Emulsion mobility control agent and preparation method thereof |
| CN109652047A (en) * | 2017-10-12 | 2019-04-19 | 沈阳慧超科技有限公司 | A kind of glucose high-efficient oil-displacing agent and flooding method |
| CN108018034A (en) * | 2017-12-01 | 2018-05-11 | 北京恒聚化工集团有限责任公司 | A kind of alkali-free binary combination flooding oil systems and preparation method thereof |
| CN109337661A (en) * | 2018-11-19 | 2019-02-15 | 安东石油技术（集团）有限公司 | Low bubble displacement of reservoir oil type irrigation of one kind and its preparation method and application |
Non-Patent Citations (1)
| Title |
|---|
| 朱红军，等: "1-十二酸胺基-1-甲基乙膦酸钠及其微乳液的缓蚀作用", 《南京化工学院学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112266774A (en) * | 2020-10-20 | 2021-01-26 | 中国石油天然气股份有限公司 | Anti-freezing type corrosion-inhibition bubble-exclusion scale inhibitor and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103459548A (en) | Delayed release well treatment composites for use in well treatment fluids | |
| CN107973424B (en) | Composite corrosion and scale inhibitor, corrosion and scale inhibition method for oil field water and oil extraction method | |
| CN104233310A (en) | Compound type imidazoline-quaternary ammonium salt corrosion inhibitor and preparation method thereof | |
| CN107973417B (en) | Composite corrosion and scale inhibitor, corrosion and scale inhibition method for oil field water and oil extraction method | |
| MX2012014187A (en) | Foaming composition with wettability modifying and corrosion inhibitory properties for high temperature and ultra-high salinity. | |
| US11542427B2 (en) | Corrosion inhibitor compositions and methods of use in acid stimulation operations | |
| CN102965090A (en) | Corrosion inhibitor composition | |
| CN107973422B (en) | Composite corrosion and scale inhibitor, corrosion and scale inhibition method for oil field water and oil extraction method | |
| CN102899013A (en) | Clastic sandstone gas reservoir acidizing fluid | |
| CN102911651A (en) | Oil field compound type anti-scale corrosion inhibitor and preparation method thereof | |
| CN110776892A (en) | Microemulsion neutral blocking remover | |
| CN107652959A (en) | A kind of oilfield transportation system and the neutral scale remover of flood pattern | |
| CA3122304A1 (en) | Methods of inhibiting scale with alkyl diphenyloxide sulfonates | |
| CN103880316A (en) | Doped organic indican concrete reinforcement corrosion inhibitor and application | |
| CN107973418B (en) | Composite corrosion and scale inhibitor, corrosion and scale inhibition method for oil field water and oil extraction method | |
| CN110643338A (en) | Corrosion inhibitor with oil displacement effect | |
| CN104357034A (en) | Environmental-friendly efficient natural gas hydrate inhibitor | |
| CN112592705A (en) | Ecological safety type scale and corrosion inhibitor and preparation method thereof | |
| CN105238379B (en) | A kind of long-acting corrosion inhibiter of acidification of gas well and its preparation method and application method | |
| EP2553058A1 (en) | Systems and methods for processing glycerol | |
| CN109868477B (en) | Vapor phase corrosion inhibitor and preparation method thereof | |
| CN114106804B (en) | High-temperature-resistant esterification type composite scale inhibitor and preparation method thereof | |
| CN107973423B (en) | Composite corrosion and scale inhibitor, corrosion and scale inhibition method for oil field water and oil extraction method | |
| CN106145397A (en) | A kind of oilfield injection water neutral corrosion inhibiting and descaling agent and preparation and application thereof | |
| CN104119850A (en) | Corrosion inhibitor used in saline medium, and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20201105 Address after: 300000 No. three, Dagang Oilfield, Binhai New Area, Tianjin Applicant after: DAGANG OILFIELD GROUP Co.,Ltd. Applicant after: China National Petroleum Corporation Pipe Research Institute Applicant after: CHINA NATIONAL PETROLEUM Corp. Address before: 300280 No. three, Dagang Oilfield, Binhai New Area, Tianjin Applicant before: DAGANG OILFIELD GROUP Co.,Ltd. Applicant before: China National Petroleum Corporation Pipe Research Institute |
|
| TA01 | Transfer of patent application right | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200103 |
|
| WD01 | Invention patent application deemed withdrawn after publication |