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Novel high-temperature resistant acidification corrosion inhibitor

An acidification corrosion inhibitor and high temperature resistant technology, applied in chemical instruments and methods, wellbore/well components, drilling compositions, etc., can solve problems such as harsh reaction conditions and difficult process conditions, and achieve long-term stability , low cost, easy preparation effect

Inactive Publication Date: 2014-03-19
钱程
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, they all need to add other substances, that is, corrosion inhibitor synergists, and the reaction components are a single component of alkylpyridine quaternary ammonium salt and ketoaldehyde amine condensate, and the reaction conditions are relatively harsh, and the general process conditions are difficult to achieve.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Preparation of ketoaldeamine condensate (weight percent, the same below):

[0049] Acetophenone: 52%

[0050] Paraformaldehyde: 36%

[0051] Cyclohexylamine: 8%

[0052] Hydrochloric acid: 3.2%

[0053] Oleic acid: 0.8%

[0054] Add the above components into the reaction kettle one by one, and react at 90-96°C for 9 hours to obtain the condensate of ketone aldehyde and amine.

[0055] Ketoaldeamine Condensate: 50%

[0056] Nonylphenol ethoxylate (TX-10) 12%

[0057] Methanol: 30%

[0058] Propylene Glycol: 4.5%

[0059] Potassium iodide: 0.5%

[0060] Thiourea: 3%.

Embodiment 2

[0062] Preparation of ketoaldeamine condensate (weight percent, the same below):

[0063] Acetophenone: 52%

[0064] Paraformaldehyde: 36%

[0065] Cyclohexylamine: 8%

[0066] Hydrochloric acid: 3.2%

[0067] Oleic Acid: 0.8%.

[0068] The above components were added to the reactor in turn, reacted at 90-95°C for 7 hours, left to age overnight, and then heated to 98°C for 2 hours.

[0069] Ketoaldeamine Condensate: 55%

[0070] Nonylphenol ethoxylates (TX-10): 10%

[0071] Ethanol: 26%

[0072] Propylene Glycol: 4.5%

[0073] Thiourea: 4%

[0074] Potassium iodide: 0.5%.

Embodiment 3

[0076] Preparation of ketoaldeamine condensate (weight percent, the same below):

[0077] Acetophenone: 45%

[0078] Paraformaldehyde: 40%

[0079] Cyclohexylamine: 11.7%

[0080] Hydrochloric acid: 3%

[0081] Oleic acid: 0.3%.

[0082] Add the above components into the reactor one by one, react at 80-88°C for 13 hours, and place it for aging overnight.

[0083] Ketoaldeamine Condensate: 45%

[0084] Nonylphenol ethoxylates (TX-10): 15%

[0085] Ethanol: 39.1%

[0086] Propylene Glycol: 0.5%

[0087] Thiourea: 0.3%

[0088] Potassium iodide: 0.1%.

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Abstract

Belonging to the technical field of oilfield chemical products, the invention in particular relates to a novel high-temperature resistant acidification corrosion inhibitor. The corrosion inhibitor is prepared by: reacting acetophenone, trioxymethylene, cyclohexylamine, hydrochloric acid with oleic acid to generate a ketone aldehyde amine condensate, and then compounding the condensate with nonylphenol polyoxyethylene ether, ethanol (methanol), thiourea, propargyl alcohol and potassium iodide. The high-temperature resistant acidification corrosion inhibitor has the advantages of no pollution of three wastes, low cost, easily available raw materials, simple process, convenient use and the like, and can effectively resist high temperature (204DEG C).

Description

technical field [0001] The invention belongs to the technical field of oil field chemical products, and in particular relates to a novel high temperature resistant acidification corrosion inhibitor. Background technique [0002] With the development of oil exploration and development, a large number of deep low-permeability reservoirs have been discovered and developed, which makes the number of acidizing wells, especially the number of acidizing wells with large doses, high concentrations, and different types of acids, increase year by year. As the newly drilled oil and gas wells are getting deeper and the bottom temperature is getting higher and higher, the acidizing construction requires the use of hydrochloric acid corrosion inhibitors up to 200 °C. Moreover, the current domestically produced corrosion inhibitors are generally only suitable for temperatures below 120°C (28% HCL). Even if the combination of expensive and rare iodide is used, only 20% HCL can be used to de...

Claims

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Application Information

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IPC IPC(8): C09K8/54
CPCC09K8/54
Inventor 钱程钱桥胜张秀霞谢名璐
Owner 钱程
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