A specific specific gravity composite material slurry for filling and consolidating the annular space of a thousand-meter deep-frozen pipe

A technology of annular space and composite materials, which is applied in the field of freezing method construction in coal mine deep shaft construction, can solve the problems of difficult precise control of specific gravity, unsatisfactory setting time, poor water retention, etc., and achieve good fluidity, adjustable setting time, and good stability Effect

Inactive Publication Date: 2017-07-28
CHINA COAL SHAANXI YULIN ENERGY & CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the use of traditional cement slurry, there are many problems such as poor water retention, poor stability, difficult to accurately control the specific gravity, and the setting time cannot meet the requirements of filling and consolidating the annular space of a thousand-meter deep well and lowering the freezing pipe.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The specific specific gravity composite material slurry for filling and consolidating the annular space of the kilometer deep frozen pipe in this embodiment is composed of the following components: 350 kg of PC. Organic stabilizer 0.6kg, retarder 2.3kg.

[0019] The specific gravity adjustment material is a mixture of floating beads, limestone powder and barite powder, of which: 50kg of floating beads, 80kg of limestone powder, and 120kg of barite powder. The organic stabilizer is a mixture of polyvinyl alcohol, polyacrylamide, methyl hydroxyethyl cellulose ether and methyl hydroxypropyl cellulose ether, of which: 0.1kg of polyvinyl alcohol, 0.2kg of polyacrylamide, methyl hydroxy Ethyl cellulose ether 0.15kg and methyl hydroxypropyl cellulose ether 0.15kg. The structural reinforcing agent is silica fume. The setting retarder is a mixture of tartaric acid, citric acid, salicylic acid and sucrose, wherein: 0.5 kg of tartaric acid, 0.7 kg of citric acid, 0.4 kg of salic...

Embodiment 2

[0022] The specific specific gravity composite material slurry for filling and consolidating the annular space of the thousand-meter deep freezing pipe in this embodiment is composed of the following components: 350 kg of PC. Organic stabilizer 0.5kg, retarder 2.15kg.

[0023] The specific gravity adjustment material is a mixture of floating beads, limestone powder and barite powder, of which: 45kg of floating beads, 55kg of limestone powder, and 100kg of barite powder. The organic stabilizer is a mixture of carboxymethyl cellulose, hydroxypropyl cellulose, methyl hydroxyethyl cellulose ether and methyl hydroxypropyl cellulose ether, wherein: carboxymethyl cellulose is 0.05kg, hydroxypropyl Cellulose 0.25kg, methyl hydroxyethyl cellulose ether 0.15kg and methyl hydroxypropyl cellulose ether 0.05kg. The structural reinforcing agent is silica fume. The retarder is a mixture of cellulose, sodium phosphate, salicylic acid and sucrose, wherein: 0.15kg of cellulose, 0.5kg of sodiu...

Embodiment 3

[0026] The specific specific gravity composite material slurry for filling and consolidating the annular space of the thousand-meter deep freezing pipe in this embodiment is composed of the following components: 250 kg of PC. Organic stabilizer 0.41kg, retarder 1.65kg.

[0027] The specific gravity adjustment material is a mixture of floating beads, limestone powder and barite powder, of which: 58kg of floating beads, 60kg of limestone powder, and 82kg of barite powder. The organic stabilizer is a mixture of polyvinyl alcohol, polyacrylamide, carboxymethyl cellulose and hydroxypropyl cellulose, of which: polyvinyl alcohol 0.1kg and polyacrylamide 0.14kg, carboxymethyl cellulose 0.08kg, hydroxypropyl cellulose Propyl cellulose 0.09kg. The structural reinforcing agent is silica fume. The retarder is a mixture of cellulose, sodium phosphate, sodium gluconate, tartaric acid and citric acid, of which: cellulose is 0.1kg, sodium phosphate is 0.25kg, sodium gluconate is 0.4kg, tart...

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Abstract

The invention discloses specific gravity composite material slurry for filling and consolidating annular space of a kilometer-deep freezing pipe. The slurry comprises the following components in parts by weight: 20-50 parts of cementing material, 1-50 parts of specific gravity adjusting material, 0.1-20 parts of composite admixture and 30-50 parts of water. The slurry has the beneficial effects that the specific gravity of the slurry can be accurately adjusted and controlled via the specific gravity adjusting material; by utilizing the physical and chemical actions of the composite admixture, the slurry has the excellent characteristics of low viscosity, good fluidity, high stability, long setting time and adjustability and controllability.

Description

technical field [0001] The invention relates to the construction field of freezing method in coal mine deep well construction, in particular to a specific specific gravity composite material slurry suitable for filling and consolidating the annular space of thousand-meter-deep freezing hole annular space. Background technique [0002] In the field of coal mine construction, the freezing method is used to freeze the strata around the shaft into a closed ring-shaped frozen wall before the shaft is excavated by artificial refrigeration to resist ground pressure and isolate the connection between groundwater and the shaft. The shaft is excavated under the protection of the frozen wall. A special coal mine construction method for masonry work. Due to the safety and effectiveness of the freezing method construction, more and more wellbores are currently constructed using the freezing method. [0003] As the depth of the wellbore increases, in the construction of full-deep freezin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B28/06
Inventor 惠本利王建平杨伟光冯旭海赵房成郭垒刘书杰高晓耕高伟滕德强宋雪飞田乐姜国静徐润李宁
Owner CHINA COAL SHAANXI YULIN ENERGY & CHEM
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