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Method for harmless treatment of drilling well waste mud

A technology of harmless treatment and waste mud, applied in chemical instruments and methods, water/sludge/sewage treatment, water/sewage multi-stage treatment, etc. Less material, anti-seepage, good water stability

Active Publication Date: 2012-03-21
BEIJING ENRUIDA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the invention of this application is to solve the problem that the existing waste drilling mud cannot be solidified well, and to provide a method for the harmless treatment of waste drilling mud

Method used

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Examples

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Embodiment Construction

[0018] A method for harmless treatment of drilling waste mud of the present invention is characterized in that it comprises the following steps:

[0019] (1) Add 150-250mg / l sodium hydroxide to the waste mud, and after fully stirring for 1-2 hours, add 90-300mg / l polyaluminum ferric chloride to the waste mud, stir for 1-3 hours, then put 1-3mg / l polyacrylamide, stirring for 1-3 hours and then standing for 1-2 days;

[0020] (2) add and account for waste mud gross weight 10-40% solidifying agent in drilling waste mud then, this solidifying agent is made of 50-70% sulphoaluminate cement clinker fine powder, 10-25% gypsum powder and 15-35% calcium oxide is made by grinding and mixing;

[0021] (3) After adding the curing agent, let it stand for 10-20 days, and the drilling waste mud will solidify into a solidified object. Its compressive strength is greater than 1.5MPa, and the softening coefficient is greater than 0.85; the leachate is less than or equal to 150mg / l; the petrole...

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Abstract

The invention relates to a method for harmless treatment of drilling well waste mud. The method comprises the following steps of: firstly adding 150-250 mg / l of colloid destabilizing agent to the waste mud; fully stirring for 1-2 h; then adding 90-300 mg / l of ion settling agent to the waste mud; stirring for 1-3 h and adding 1-3 mg / l of adsorption flocculant; stirring for 1-3 h and standing for 1-2 d; then adding a solidifying agent accounting for 10-40% of total weight of the waste mud to the drilling well waste mud, wherein the solidifying agent is prepared by grinding, stirring and mixing 50-70% of coagulator, 10-25% of adsorbent and 15-35% of calcium oxide; standing for 10-20 d after the solidifying agent is added; and solidifying the drilling well waste mud to form a condensate. The method can solidify the drilling well waste mud with high water content, high organic matter and many harmful substances and has the characteristics of low treatment cost, convenience for use, long stabilization period, no secondary pollution or no damage to soil and meets the environmental protection requirement and the like.

Description

technical field [0001] The invention relates to a method for treating waste drilling mud, in particular to a method for harmless treatment of waste drilling mud. Background technique [0002] Drilling waste mud needs solidification treatment. If it is not treated properly, harmful substances will seep out and pollute the soil and groundwater resources in the surrounding environment. The land occupied and polluted by oil drilling waste mud for a long time cannot be environmentally friendly and reused, which increases the cost of oil extraction and reduces the benefits of oil fields. Contents of the invention [0003] The purpose of the invention of this application is to solve the problem that the existing waste drilling mud cannot be solidified well, and to provide a method for harmless treatment of the waste drilling mud. [0004] In order to accomplish the purpose of the invention of the application, the present invention adopts the following technical solutions: [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/52
Inventor 张晓瑞段维庆候德霞
Owner BEIJING ENRUIDA TECH
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