Sewage filter cleaning agent and preparation thereof

A sewage filter and cleaning agent technology, which is applied in the field of oil field chemistry, can solve the problems of low filtration efficiency, sewage water quality that cannot meet the requirements of water injection standards, and unsatisfactory backwashing effect, etc., and achieve the effect of improving filtration efficiency

Active Publication Date: 2008-12-24
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, sewage is still used for backwashing filters, and the backwashing effect is not ideal.
A large amount of crude oil still adheres to the

Method used

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  • Sewage filter cleaning agent and preparation thereof

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Experimental program
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Effect test

Embodiment 1

[0035] The weight ratio of each component of sewage filter cleaning agent is:

[0036] 1. Citric acid (industrial product): 7%

[0037] 2. Hydrochloric acid (industrial product) (industrial product); 4.5%

[0038] 3. Alias ​​of hydroxy-1,1-ethylenediphosphonic acid sulfonic acid (industrial product), GY-9200: 0.15%

[0039] 4. Alkylphenol polyoxyethylene (14) ether (industrial product): 5.5%

[0040] 5. The rest is water, and the sum of the weight percentages of each component is 100%.

[0041] Preparation Process:

[0042] First, five raw materials including citric acid, hydrochloric acid, hydroxy-1,1-ethylenediphosphonic acid sulfonic acid, hydroxy-1,1-ethylenediphosphonic acid sulfonic acid, and water are added in proportion to the normal pressure enamel reaction kettle . Stir continuously for 30 minutes.

[0043] Finally, add alkylphenol polyoxyethylene (14) ether in proportion, stir while adding, and discharge after stirring for 20 minutes to obtain a sewage filter ...

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PUM

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Abstract

The invention provides a sewage filter cleaning agent. The cleaning agent is used in oil fields to remove crude oil and impurities deposited on filter screens. The cleaning agent consisting of the following components in weight percentage: a. 5 to 10 percent of citric acid; b. 3 to 5 percent of hydrochloric acid; c. 0.05 to 0.2 percent of hydroxide radical-1, 1-ethidene diphosphonic acid sulfonic acid; d. 4 to 6 percent of alkyl phenol polyoxyethylene(14) ether; and d. the remaining being water. The cleaning agent has the advantages that, the cleaning agent can remove the majority of crude oil and impurities deposited on filter materials, and the filtering efficiency of the sewage filter which is cleaned is improved by 20 percent, the oil content of the sewage which is filtered is less than 4mg/l, and the oil content of the mechanical impurity is less than 10mg/l.

Description

technical field [0001] The invention relates to the technical field of oil field chemistry, in particular to a sewage filter cleaning agent, which is used for backwashing the filter, removing crude oil and impurities deposited on the filter screen, cleaning the filter screen, and making the filtered sewage water quality up to standard. detergent. Background technique [0002] Oilfield development is in the middle and later stages, and a large amount of sewage is separated from crude oil. After the sewage needs to be treated to meet the reinjection standard, it is injected back into the formation to supplement the energy of the formation. In the process of sewage treatment in the oil field, in order to improve the filtration efficiency, it is necessary to backwash the filter regularly. However, at present, sewage is still used for backwashing filters, and the backwashing effect is not ideal. A large amount of crude oil still adheres to the cleaned filter, resulting in low f...

Claims

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Application Information

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IPC IPC(8): C11D1/83C11D3/20B01D33/60
Inventor 付亚荣周晓俊田炜蔡远红刘宏伟吴泽美李冬青郭小玉孙学峰常洪付丽霞李光蓉郑征黎运强
Owner PETROCHINA CO LTD
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