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Method for solidifying harmful metal ions with hydrogel, cement slurry and cementing cement

A technology of metal ions and cementing cement, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of environmental secondary pollution and other issues

Active Publication Date: 2022-07-22
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cement stone formed after solidifying harmful metal ions with cement is useless and will cause secondary pollution to the environment

Method used

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  • Method for solidifying harmful metal ions with hydrogel, cement slurry and cementing cement
  • Method for solidifying harmful metal ions with hydrogel, cement slurry and cementing cement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1 A kind of method of cementing cement solidifying harmful metal ions

[0031] Prepare 200g of 10000mg / L copper sulfate solution, then add AMPS 40g, MBA 0.4g, ammonium persulfate 0.8g, stir to dissolve evenly, and polymerize at 75°C for 4h to form a hydrogel. Add 90g of water gel to the slurry water, and prepare cement slurry according to the following formula: G-grade oil well cement 600g+ sulfonic acid group and carboxylic acid group copolymerized fluid loss agent 15g+ sulfonated aldehyde and ketone type dispersant 3g+90g hydrogel +150g water. The mass ratio of hydrogel and water to cement mass was 0.4. The cement slurry is denoted as C1.

Embodiment 2

[0032] Embodiment 2 A kind of method of cementing cement solidifying harmful metal ions

[0033] Prepare 200g of 10000mg / L copper sulfate solution, then add AMPS 80g, MBA 0.4g, ammonium persulfate 0.8g, stir to dissolve evenly, and polymerize at 75°C for 4h to form a hydrogel. Add 120g of water gel to the slurry water, and prepare cement slurry according to the following formula: G-grade oil well cement 600g + sulfonic acid group and carboxylic acid group copolymerized fluid loss agent 15g + sulfonated aldehyde and ketone type dispersant 3g + 120g hydrogel +120g water. The mass ratio of hydrogel and water to cement mass was 0.4. Cement slurry is denoted as C2.

Embodiment 3

[0034] Embodiment 3 A kind of method of cementing cement solidification harmful metal ion

[0035] Prepare 200g of 10000mg / L zinc sulfate solution, then add AA40g, MBA0.4g, ammonium persulfate 0.8g, stir to dissolve evenly, and polymerize at 70°C for 5h to form a hydrogel. Add 90g of water gel to the slurry water, and prepare cement slurry according to the following formula: G-grade oil well cement 600g+ sulfonic acid group and carboxylic acid group copolymerized fluid loss agent 15g+ sulfonated aldehyde and ketone type dispersant 3g+90g hydrogel +150g water. The mass ratio of hydrogel and water to cement mass was 0.4. Cement slurry is denoted as C3.

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Abstract

The invention discloses a method for solidifying harmful metal ions with hydrogel, cement slurry and cementing cement. The water containing harmful metal ions is made into hydrogel, and the hydrogel is mixed with oil well cement to prepare cementing cement slurry. . The invention provides a method for cementing cement to solidify harmful metal ions. On the premise that the performance of the cement slurry meets the requirements of cementing, as many harmful metal ions as possible can be added to the cementing cement slurry, so as to meet the requirements of both cementing and cementing. Well engineering needs, but also the purpose of dealing with harmful metal ion pollution.

Description

technical field [0001] The invention relates to the fields of environmental protection and oil and gas well cementing materials, and implements the solidification of harmful metal ions while cementing oil and gas wells, in particular to a method for solidifying harmful metal ions with hydrogel, cement slurry and cementing cement. Background technique [0002] At present, my country is facing severe environmental protection pressure. Many industries will produce waste water, which contains metal ions that are harmful to animals and plants. Therefore, how to efficiently deal with harmful metal ion pollution is the focus of environmental protection. Cement curing is currently the main method to deal with harmful metal ion pollution. The cement curing process means that after a series of treatments, industrial wastewater is uniformly mixed and stirred with the curing base (cement) and other framework materials (such as vermiculite, sand), and then placed in a special mold for cu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/58C08F222/38C08F220/06C08J3/075C09K8/467C04B24/26C04B24/16C04B28/00C08L33/24C08L33/02
CPCC08F220/585C08F220/06C08J3/075C09K8/467C04B40/0039C04B28/00C08J2333/24C08J2333/02C04B2201/20C04B2201/50C08F222/385C04B24/2641C04B24/16
Inventor 柳华杰殷慧步玉环徐铭欣
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)