CN103014716A - Corrosion inhibitor composition for preventing hydrogen sulfide and carbon dioxide corrosion - Google Patents
Corrosion inhibitor composition for preventing hydrogen sulfide and carbon dioxide corrosion Download PDFInfo
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- CN103014716A CN103014716A CN2012102816369A CN201210281636A CN103014716A CN 103014716 A CN103014716 A CN 103014716A CN 2012102816369 A CN2012102816369 A CN 2012102816369A CN 201210281636 A CN201210281636 A CN 201210281636A CN 103014716 A CN103014716 A CN 103014716A
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- corrosion inhibitor
- carbon dioxide
- hydrogen sulfide
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Abstract
The invention discloses a corrosion inhibitor composition for preventing hydrogen sulfide and carbon dioxide corrosion, which is characterized by comprising the following components in mass ratio: 1-5 parts of tween, 15-30 parts of ethanol, 20-40 parts of imidazoline derivative, 5-30 parts of alkynol derivative, 1-5 parts of octanol, 2-25 parts of sodium tungstate, and 2-33 parts of water. The corrosion inhibitor composition has the property of preventing hydrogen sulfide and carbon dioxide corrosion suitable for deep oil wells at high temperature, and the corrosion inhibition efficiency on N80 steel is more than 90%.
Description
Technical field
The invention belongs to the inhibiter field, relate to the composite corrosion inhibitor of a kind of anti-H 2 S and carbon dioxide corrosion.
Background technology
Along with going deep into of oil-field development, the metallic corrosion that hydrogen sulfide corrosion and carbonic acid gas form the hybrid corrosion medium increases the weight of gradually, has directly threatened the safety and stability production in oil field.Simultaneously, the hydrogen sulfide that discharges is again highly toxic substance, directly threatens people's healthy and life security.At H
2In S and the simultaneous situation of CO2 corrosive medium, H2S, the CO2 relative content has complicated impact to corrosion.Generally acknowledge that relatively rule is that: H2S is relevant with ratio and the corrosion condition of CO2 content, generally represents its ratio with its dividing potential drop.Ratio PCO when its dividing potential drop
2/ PH
2S＜20, corrosion is take H2S as main; 20≤PCO
2/ PH
2S＜500, this corrodes with CO
2And H
2The S acting in conjunction is main; PCO
2/ PH
2S 〉=500, in time, corrode take CO2 as main.Simultaneously, the Cl in the water quality
-Ion plays catalyzer in the corrosion process of oil pipe, hinder the iron sulfide film of protectiveness in the formation of steel surface, and Cl
-Can also cross pore or the defective of metal surface sulfurizing iron protective membrane and infiltrate film, make protective membrane that micro-cracking occur, cause pitting.Cl
-In case contact with gold surface, can accelerate the iron ion dissolving, generate the FeCl of facile hydrolysis
3Thereby, accelerated corrosion.
In all multi-control corrosion measures, inhibiter is most economical effective means, selects rational inhibiter.The application specific aim of inhibiter is stronger, and for different corrosive mediums and environment, the inhibiter of use is different, even same medium, when the operating parts such as temperature, pressure, concentration and flow velocity changed, the inhibiter of employing also needed to change.Therefore, should first by indoor compatibleness test, test to select inhibiter in conjunction with field evaluation.Concrete situation for its corrosion, therefore, developing a kind of composite corrosion inhibitor that can effectively control hydrogen sulfide and carbon dioxide mix corrosion or weakening hydrogen sulfide corrosion and carbon dioxide mix corrosion, is very necessary, significant to the healthy of oilfield safety, stably manufactured and people.Inhibiter is a kind of easy of control hydrogen sulfide and carbon dioxide corrosion, economy, effectively one of important substance and method.The inhibition efficiency of inhibiter and steel kind, corrosive environment, the temperature on stratum has close relationship, and the general oil well of western oil field turns well depth and has all surpassed 5000m, and underground environment is complicated, and temperature is higher, and all adopts height to contain Cr, Ni, Mo steel.Employed inhibiter so far can not adapt to the situation in oil field, is difficult to obtain satisfied effect.Therefore, the task of top priority need to be developed a kind of composite inhibiter composition with several functions is controlled hydrogen sulfide corrosion with realization purpose.
Summary of the invention
The objective of the invention is to solve western oil field hydrogen sulfide and carbon dioxide corrosion problem in order to overcome the deficiency of existing inhibiter the work-ing life of Yanchang Oilfield equipment, safety, the stably manufactured in assurance oil field.A kind of anti-H 2 S of suitable oil field deep well and the composite corrosion inhibitor of carbon dioxide corrosion are provided.
To achieve these goals, the present invention's technical scheme of taking of dealing with problems is:
Consider that corrosive environment is the hybrid corrosion environment of hydrogen sulfide and carbonic acid gas, simultaneously, also have chlorion to exist in the corrosive environment, so by adopting tetrahydroglyoxaline to control carbon dioxide corrosion, control hydrogen sulfide corrosion with alkynol, use the sodium wolframate passivating metallic surfaces, raising is to the erosion-resistant effect of chlorion, its concrete scheme is by tween, ethanol, imidazolidine derivatives, propargyl alcohol derivative, octanol, sodium wolframate and water form, and each components in mass portion content range is:
1～5 part of tween,
15～30 parts of ethanol,
20～40 parts of imdazole derivatives,
5～30 parts of propargyl alcohol derivatives,
1～5 part of octanol,
Sodium wolframate 2-25 part,
Water 2-33 part.
The molecular structure of imidazolidine derivatives described above is:
Wherein: R1 and R2 can be identical, also can not be all the alkyl of 1-6 atom, and it derives from the by product of pharmaceutical industry;
The molecular structure of described propargyl alcohol derivative is:
Wherein: R is the alkyl of 1-8 carbon atom, and it derives from following reaction:
Preparation method of the present invention is: after according to proportioning each component directly being joined in the reactor dissolving, stirs, and packing.
During use, be 100mg/L according to concentration, directly join in the environment that uses hardware and get final product.
The present invention compares with existing inhibiter, and the advantage and the beneficial effect that have mainly are:
Have anti-H 2 S in the suitable oil field deep well high temperature and the performance of carbon dioxide corrosion; To N80 steel inhibition efficiency more than 90%.
Embodiment
Embodiment 1
One, the composition of this composite corrosion inhibitor is in mass ratio:
5 parts of tweens,
15 parts of ethanol,
20 parts of imdazole derivatives,
5 parts of propargyl alcohol derivatives,
1 part of octanol,
25 parts of sodium wolframates,
29 parts in water.
Two, the preparation method of this composite corrosion inhibitor is: after each component is directly joined in the reactor dissolving, stirs, and packing.
Three, embodiment effect: N80 steel inhibition efficiency is 90%.
Embodiment 2
One, the composition of this composite corrosion inhibitor is in mass ratio:
1 part of tween,
15 parts of ethanol,
20 parts of imdazole derivatives,
10 parts of propargyl alcohol derivatives,
1 part of octanol,
25 parts of sodium wolframates,
33 parts in water.
Two, the preparation method of this composite corrosion inhibitor is with embodiment 1.
Three, embodiment effect: N80 steel inhibition efficiency is 91%.
Embodiment 3
The mass ratio of its component is:
5 parts of tweens,
25 parts of ethanol,
25 parts of imdazole derivatives,
15 parts of propargyl alcohol derivatives,
3 parts of octanols,
15 parts of sodium wolframates,
12 parts in water.
Two, the preparation method of this composite corrosion inhibitor is with embodiment 1.
Three, embodiment effect: N80 steel inhibition efficiency is 95%.
Embodiment 4
One, the composition of this composite corrosion inhibitor is in mass ratio:
3 parts of tweens,
20 parts of ethanol,
38 parts of imdazole derivatives,
30 parts of propargyl alcohol derivatives,
5 parts of octanols,
2 parts of sodium wolframates,
2 parts in water.
Two, the preparation method of this composite corrosion inhibitor is with embodiment 1.
Three, embodiment effect: N80 steel inhibition efficiency is 92%.
Embodiment 5
One, the composition of this composite corrosion inhibitor is in mass ratio:
4 parts of tweens,
15 parts of ethanol,
30 parts of imdazole derivatives,
30 parts of propargyl alcohol derivatives,
4 parts of octanols,
10 parts of sodium wolframates,
7 parts in water.
Two, the preparation method of this composite corrosion inhibitor is with embodiment 1.
Three, embodiment effect: N80 steel inhibition efficiency is 89%.
Embodiment 6
One, the composition of this composite corrosion inhibitor is in mass ratio:
2 parts of tweens,
24 parts of ethanol,
25 parts of imdazole derivatives,
25 parts of propargyl alcohol derivatives,
3 parts of octanols,
20 parts of sodium wolframates,
26 parts in water.
Two, the preparation method of this composite corrosion inhibitor is with embodiment 1.
Three, embodiment effect: N80 steel inhibition efficiency is 96%.
Embodiment 7
One, the composition of this composite corrosion inhibitor is in mass ratio:
3 parts of tweens,
18 parts of ethanol,
40 parts of imdazole derivatives,
5 parts of propargyl alcohol derivatives,
3 parts of octanols,
25 parts of sodium wolframates,
6 parts in water.
Two, the preparation method of this composite corrosion inhibitor is with embodiment 1.
Three, embodiment effect: N80 steel inhibition efficiency is 97%.
Embodiment 8
One, the composition of this composite corrosion inhibitor is in mass ratio:
2 parts of tweens,
27 parts of ethanol,
35 parts of imdazole derivatives,
28 parts of propargyl alcohol derivatives,
3 parts of octanols,
3 parts of sodium wolframates,
2 parts in water.
Two, the preparation method of this composite corrosion inhibitor is with embodiment 1.
Three, embodiment effect: N80 steel inhibition efficiency is 96%.
Embodiment of the present invention only is used for the explanation technical solution of the present invention, is not limited to the present invention.
Claims (1)
1. the composite corrosion inhibitor of an anti-H 2 S and carbonic acid gas is characterized in that by tween, ethanol, and imidazolidine derivatives, propargyl alcohol derivative, octanol, sodium wolframate and water form, and each components in mass portion content range is:
1～5 part of tween,
15～30 parts of ethanol,
20～40 parts of imdazole derivatives,
5～30 parts of propargyl alcohol derivatives,
1～5 part of octanol,
Sodium wolframate 2-25 part,
Water 2-33 part;
The molecular structure of imidazolidine derivatives described above is:
Wherein: R1 and R2 can be identical, also can not be all the alkyl of 1-6 atom, and it derives from the by product of pharmaceutical industry;
The molecular structure of described propargyl alcohol derivative is:
Wherein: R is the alkyl of 1-8 carbon atom, and it derives from following reaction:
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| CN201210281636.9A CN103014716B (en) | 2012-08-09 | 2012-08-09 | Corrosion inhibitor composition for preventing hydrogen sulfide and carbon dioxide corrosion |
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| CN201210281636.9A CN103014716B (en) | 2012-08-09 | 2012-08-09 | Corrosion inhibitor composition for preventing hydrogen sulfide and carbon dioxide corrosion |
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| CN103014716B CN103014716B (en) | 2014-09-10 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110318059A (en) * | 2019-08-09 | 2019-10-11 | 中北大学 | A kind of Compositional type carbon steel pickling corrosion inhibitor and its application |
| CN110698956A (en) * | 2019-10-17 | 2020-01-17 | 江苏科技大学 | Carbon dioxide corrosion resistant water-based coating composition and preparation method and application thereof |
Citations (4)
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| US4389371A (en) * | 1979-09-14 | 1983-06-21 | Basf Wyandotte Corporation | Process for inhibiting the corrosion of aluminum |
| CN101565241A (en) * | 2009-06-04 | 2009-10-28 | 李秀宁 | Non-phosphorus scale and corrosion inhibitor |
| CN102061157A (en) * | 2011-01-12 | 2011-05-18 | 中国石油集团川庆钻探工程有限公司 | Gas-liquid double-phase corrosion inhibitor for gas well and preparation method thereof |
| WO2011143358A2 (en) * | 2010-05-12 | 2011-11-17 | Jsk Capital Llc | Method for lowering ph using urea sulfate in the presence of corrosion inhibitor |
-
2012
- 2012-08-09 CN CN201210281636.9A patent/CN103014716B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4389371A (en) * | 1979-09-14 | 1983-06-21 | Basf Wyandotte Corporation | Process for inhibiting the corrosion of aluminum |
| CN101565241A (en) * | 2009-06-04 | 2009-10-28 | 李秀宁 | Non-phosphorus scale and corrosion inhibitor |
| WO2011143358A2 (en) * | 2010-05-12 | 2011-11-17 | Jsk Capital Llc | Method for lowering ph using urea sulfate in the presence of corrosion inhibitor |
| CN102061157A (en) * | 2011-01-12 | 2011-05-18 | 中国石油集团川庆钻探工程有限公司 | Gas-liquid double-phase corrosion inhibitor for gas well and preparation method thereof |
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| 王建华 等: ""咪唑啉衍生物缓蚀剂的研制及其性能评价"", 《精细石油化工进展》 * |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110318059A (en) * | 2019-08-09 | 2019-10-11 | 中北大学 | A kind of Compositional type carbon steel pickling corrosion inhibitor and its application |
| CN110318059B (en) * | 2019-08-09 | 2021-03-16 | 中北大学 | Compound carbon steel pickling corrosion inhibitor and application thereof |
| CN110698956A (en) * | 2019-10-17 | 2020-01-17 | 江苏科技大学 | Carbon dioxide corrosion resistant water-based coating composition and preparation method and application thereof |
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|---|---|
| CN103014716B (en) | 2014-09-10 |
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