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Process for two-step harmless recycling treatment of water-based drilling wastes

A technology for the harmless treatment of drilling waste, which is applied in earthwork drilling, wellbore flushing, wellbore/well parts, etc. It can solve the problems of large resource consumption, multiple processing steps, secondary pollution, etc., and achieve low cost , The treatment process is simple, the effect of improving the strength

Pending Publication Date: 2021-11-05
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this treatment method can make the mud harmless, it needs to be treated step by step. At the same time, secondary pollution will inevitably occur during the treatment process. Therefore, the existing technology has the disadvantages of many treatment steps, large resource consumption, and secondary pollution.

Method used

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  • Process for two-step harmless recycling treatment of water-based drilling wastes
  • Process for two-step harmless recycling treatment of water-based drilling wastes
  • Process for two-step harmless recycling treatment of water-based drilling wastes

Examples

Experimental program
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Effect test

Embodiment 1

[0036] S1: Harmless treatment of water-based drilling waste. Take 2000g of drilling waste, add aluminum sulfate 3%wt, Portland cement 10%wt, acrylic acid emulsion 1‰, sodium aluminate 3%wt, sodium persulfate 1%wt, stir well and pour out to dry naturally or in the sun Dry and crush to obtain about 1 kg of solid A.

[0037] S2: Stir 1kg of Portland cement, 0.5kg of sand and 1kg of solid A, add 1kg of water and 150g of sodium aluminate, mix well, add 2.5kg of stones, add 0.25kg of calcium oxide as a reinforcing agent, stir well, pour into the mold, Put it on a cement shaker and shake it for 10 minutes to form. After standing for 1 day, remove the mold for curing, and measure the compressive strength for 7 days, 14 days and 28 days.

Embodiment 2

[0039] S1: Harmless treatment of water-based drilling waste. Take 4000g of drilling waste, add aluminum sulfate 1.5%, ferrous chloride 0.5%, Portland cement 6%, lime 1%, gypsum 1%, acrylic acid emulsion 5‰, sodium aluminate 5%, stir well and pour out Naturally air-dried or sun-dried, crushed to obtain about 2kg of solid B.

[0040] S2: Stir 1.25kg of Portland cement and 1.5kg of solid B evenly, add 1.25kg of water and 100g of sodium aluminate, stir well, add 2.25kg of stones, 0.15kg of sodium hydroxide, stir well, pour into the mold, put Shake on a cement shaker for 10 minutes to form. After standing for 1 day, remove the mold for curing, and measure the compressive strength for 7 days, 14 days and 28 days.

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Abstract

The invention discloses a process for harmless recycling treatment of water-based drilling wastes. The water-based drilling wastes are applied to concrete products for the first time. According to the process, firstly, toxic and harmful substances in the water-based drilling wastes are degraded, chelated and cured by using a gel breaker, an oxidizing agent, a curing agent and a coagulation accelerator, and superfine soil particles are aggregated into particles with relatively large particle sizes; and the product is mixed with cement and gravel, and the activity of the superfine soil particles is further excited by utilizing the exciting effect of a reinforcing agent, so that the superfine soil particles can be matched with the cement and the gravel to prepare a concrete prefabricated part with good performance. According to the process, water-based drilling waste treatment and recycling are innovatively and uniformly combined, resources are saved, emission is reduced, and pollution is reduced. Therefore, the process has innovativeness and very high practical application value.

Description

technical field [0001] The invention belongs to the technical field of harmless resource treatment of water-based drilling waste, and in particular relates to the treatment of mud (wastewater and ultrafine particles) in water-based drilling waste and its application process in concrete. Background technique [0002] During the drilling process, a large amount of water-based drilling waste is produced, including cuttings and mud (waste water and ultrafine particles), and the amount of mud is about 3 times the drilling volume. In order to maintain the stability of the side of the drilling well, a large amount of chemicals will be added to the drilling mud. Therefore, the mud has a high colloidal rate, good stability, and is not easy to lose water and dry out. After the completion of the drilling project, a large amount of waste mud will be left behind, which will cause environmental pollution and need to be disposed of on site, which has become a major problem. At present, th...

Claims

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Application Information

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IPC IPC(8): E21B21/06E21B41/00
CPCE21B21/066E21B21/062E21B41/0057
Inventor 邓苗邓建雄刘朋谢宇风黎小海刘向彬
Owner CHENGDU UNIVERSITY OF TECHNOLOGY