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A surface coating agent and process for treating drilling solidified waste

A technology of surface coating and coating process, which is applied in the direction of pretreatment surface, device for coating liquid on the surface, special surface, etc., can solve the problems of poor environmental adaptability, achieve enhanced curing bonding strength, improve hydrophobicity, and ensure The effect of intensity

Active Publication Date: 2021-03-26
CHINA UNIV OF PETROLEUM (EAST CHINA) +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The surface coating agent and process can be applied to drilling waste solidified with different cementing materials, can overcome the defects of secondary leaching pollution and poor environmental adaptability of solidified drilling waste formed by solidification technology, and improve the environmental adaptability of solidified drilling waste Non-toxic and environmentally friendly, it helps to realize the reuse and recycling of drilling waste in various environments

Method used

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  • A surface coating agent and process for treating drilling solidified waste
  • A surface coating agent and process for treating drilling solidified waste
  • A surface coating agent and process for treating drilling solidified waste

Examples

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Effect test

Embodiment 1

[0040] A surface coating agent for treating drilling solidified waste, comprising the following components in mass fraction: 30wt% acrylate polyether resin, 10wt% sodium silicate, 2wt% acetic acid, 25wt% vinyltrimethoxysilane , and the balance is water. The particle size of the coating agent is 120nm, and the viscosity at room temperature is 30mPa·s. Described acrylate polyether type resin contains the structural unit shown in formula (1)-formula (3), wherein, the mass ratio of the structural unit shown in formula (1), formula (2) and formula (3) is 3 :2:1, its weight average molecular weight is 40,000.

[0041]

[0042]

[0043] Among them, n=3.

[0044] Take 100g of drilling waste, solidify it with a curing agent containing cement-based cementitious material, and cure it under natural conditions for 14 days. After pre-treating the cured waste, brush one layer of coating agent, and after the coating agent dries to form a film, brush another layer in the same way. Af...

Embodiment 2

[0046] A surface coating agent for treating drilling solidified waste, comprising the following components in mass fraction: 30wt% acrylamide polyether type resin, 10wt% potassium silicate, 2wt% formic acid, 25wt% 3-glycidyl ether oxygen propyltriethoxysilane, and the balance is water. The particle size of the coating agent is 120nm, and the viscosity at room temperature is 30mPa·s. Described acrylamide polyether type resin contains the structural unit shown in formula (2), formula (3) and formula (4), wherein, the structural unit shown in formula (2) formula (3) and formula (4) The mass ratio is 3:2:5, and its weight average molecular weight is 50,000.

[0047]

[0048] Among them, n=2.

[0049] Take 100g of drilling waste, solidify it with a curing agent containing cement-based cementitious material, and cure it under natural conditions for 21 days. After pretreating and solidifying the waste, dip-coat one layer of coating agent, and after the coating agent dries to fo...

Embodiment 3

[0051] A kind of surface coating agent that is used for processing drilling solidification waste, comprises the component of following mass fraction: 30wt% terephthalate polyether type resin, 10wt% potassium silicate, 2wt% formic acid, 25wt% 3- Glycidyl etheroxypropyl triethoxysilane, the balance is water. The particle size of the coating agent is 120nm, and the viscosity at room temperature is 30mPa·s. The terephthalate polyether resin contains structural units represented by formula (5), and its weight average molecular weight is 80,000.

[0052]

[0053] Among them, m=15.

[0054] Take 100g of drilling waste, solidify it with a curing agent containing cement-based cementitious material, and cure it under natural conditions for 28 days. After the pretreatment of solidified waste, spray one layer of coating agent, and after the coating agent dries to form a film, spray another layer in the same way. After curing at a temperature of 40°C for 2 days, a surface-coated cure...

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Abstract

The invention discloses a surface coating agent for treating drilling solidified waste. The surface coating agent is prepared from the following components by weight: 20-40% of polyether ester resin, 5-20% of inorganic filler, 0.5-5% of organic carboxylic acid, 10-35% of silane coupling agent and the balance of water; the sum of the mass percentages of the components is 100%. The invention also discloses a coating process, comprising solidified waste conserving, surface pretreatment, surface coating, and conserving of a coated solidified material. The surface coating agent and the coating process disclosed by the invention have the advantages of low cost, simple method, short processing time and little influence on the environment, and can alleviate compressive strength loss caused by water invasion and acid-base corrosion, and the immersion strength loss rate is reduced from the lowest 59% to 14%; the acid and alkali resistance of the solidified waste is enhanced, secondary pollution caused by leaching of internal organic pollutants and heavy metal ions can be prevented, and the environmental adaptability and environmental protection of the drilling solidified waste are improved, thus helping to achieve reuse and resource utilization of the drilling waste in various environments.

Description

technical field [0001] The invention relates to the technical field of advanced treatment of drilling waste, in particular to a surface coating agent and a process for treating solidified drilling waste. Background technique [0002] Drilling waste mainly refers to the mixed product of waste drilling fluid, cuttings and waste generated from drilling equipment maintenance after drilling and completion in the oil field, usually with high color, high turbidity, high chemical oxygen demand (COD), high The environmental impact characteristics of inorganic salt content and heavy metal ion content will form a hidden danger of environmental pollution if no harmless treatment is carried out. At present, the solidification method is a common treatment method for drilling waste, and it is often used as the last step of treatment. The curing technology is based on the solid phase in the waste drilling mud, adding a series of chemical curing agents (mainly cement, lime, magnesium oxychl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/02C09D133/26C09D167/02C09D5/08C09D7/61C09D7/63B05D3/00B05D3/10B05D3/12B05D5/08B05D7/00
CPCB05D3/007B05D3/104B05D3/12B05D5/08B05D7/54B05D2301/00B05D2320/00B05D2518/00C09D5/08C09D133/02C09D133/26C09D167/02C09D7/61C09D7/63B05D2420/01B05D2420/02C08K3/34C08K5/5425C08K5/5435C08K5/544
Inventor 黄维安雷明王晓强李公让邱正松钟汉毅王婧雯王永超
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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