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Hydrogel, cement paste and method for curing harmful metal ions by using well cementation cement

A technology for metal ions and cementing slurry, which is applied in the field of cement slurry and cementing cement to solidify harmful metal ions and hydrogels, can solve problems such as secondary environmental pollution, reduce leaching, avoid adverse effects, and ensure basic performance. effect of demand

Active Publication Date: 2020-10-27
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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  • Hydrogel, cement paste and method for curing harmful metal ions by using well cementation cement
  • Hydrogel, cement paste and method for curing harmful metal ions by using well cementation cement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1 A method for solidifying harmful metal ions with cement

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

Embodiment 2

[0032] Embodiment 2 A method for solidifying harmful metal ions with cement

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

Embodiment 3

[0034] Embodiment 3 A method for solidifying harmful metal ions with cement

[0035] Prepare 200g of 10000mg / L zinc sulfate solution, then add 40g of AA, 0.4g of MBA, 0.8g of ammonium persulfate, stir and dissolve evenly, and polymerize at 70°C for 5h to form a hydrogel. Take 90g of hydrogel and add it to the slurry mixing water, and prepare cement slurry according to the following formula: G grade oil well cement 600g + sulfonic acid group and carboxylic acid group copolymerization type fluid loss reducer 15g + sulfonated aldehyde and ketone type dispersant 3g + 90g hydrogel +150g water. The mass ratio of hydrogel and water to cement mass is 0.4. The cement slurry is recorded as C3.

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Abstract

The invention discloses hydrogel, cement paste and a method for curing harmful metal ions by using well cementation cement. The method comprises the following steps: preparing hydrogel from water containing harmful metal ions, and mixing the hydrogel with oil well cement to prepare the well cementation cement paste. According to the method for curing the harmful metal ions by using the well cementation cement, on the premise that the performance of the cement paste meets the well cementation requirement, the harmful metal ions can be added into the well cementation cement paste as many as possible, and therefore the purposes of meeting the requirement of well cementation engineering and treating pollution of the harmful metal ions are achieved.

Description

technical field [0001] The invention relates to the fields of environmental protection and oil and gas well cementing materials, and solidifies 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 harmful to animals and plants. Therefore, how to efficiently deal with harmful metal ion pollution is the focus of environmental protection. The use of cement solidification is currently the main method to deal with harmful metal ion pollution. The cement curing process refers to the process of uniformly mixing and stirring the industrial wastewater with the curing base material (cement) and other structural materials (such as vermiculite, sand) after a series of treatments, and then putting it into a...

Claims

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Application Information

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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)
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