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Mining environment-friendly degradable gel drilling sealing material and preparation method thereof

A sealing material and an environmentally friendly technology, which is applied in the field of mine-used environmentally friendly degradable gel drilling sealing material and its preparation, can solve the problems affecting the on-site use effect and experience of the material, the increase of the molecular weight and volume of the hydrogel, and the performance of the product. Reduce the problems such as prolonging the volume filling capacity, lowering the acquisition threshold, and increasing the water retention performance

Pending Publication Date: 2022-08-05
CCTEG CHINA COAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) The phase-change gel drilling sealing material is a granular water-soluble polymer material, which forms a uniform gel system after the swelling reaction, but because the material uses a cross-linked network structure to achieve swelling and retain a large amount of water, resulting in hydraulic coagulation The molecular mass and volume of the glue increase, and the phenomenon of water and glue layering is easily affected by gravity during use, causing the upper part of the gel to analyze water, which eventually leads to a decrease in the overall performance;
[0005] (2) The phase-change gel drilling sealing material is mainly cellulose ether, which has strong surface activity and is prone to foam during use, which affects the on-site use effect and experience of the material

Method used

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  • Mining environment-friendly degradable gel drilling sealing material and preparation method thereof
  • Mining environment-friendly degradable gel drilling sealing material and preparation method thereof
  • Mining environment-friendly degradable gel drilling sealing material and preparation method thereof

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preparation example Construction

[0053] Another aspect of the embodiments of the present invention also provides a method for preparing the above-mentioned environmentally friendly degradable gel drilling sealing material for mining, which includes the following steps: fully stirring and mixing the modified cellulose ether and the additive according to the ratio, and then mixing with water After mixing and stirring for 3 to 5 minutes, an environmentally friendly degradable gel hole sealing material for mining is prepared, and the hole can be directly grouted and sealed.

[0054] On the other hand, the embodiment of the present invention also provides a decomposer used in conjunction with the mine-used degradable gel drilling and sealing material. The components of the decomposer are: α-amylase, β-glucanase, β-glucose glycosidase and xylanase; the mass ratio is: (2-5):(4-10):(20-30):(50-60).

[0055] The implementation method of the decomposer of the present invention is an external injection type, and the spe...

Embodiment 1

[0059] (1) Preparation of dry material: take 2500 parts of modified cellulose ether, 350 parts of suspending agent, NaHCO 3 20 parts of sodium citrate, 30 parts of sodium citrate, 50 parts of potassium trichlorate, 40 parts of sodium hydroxymethyl glycinate, 50 parts of hydroxyethyl urea powder, 60 parts of anti-foaming agent, mixed evenly to prepare dry material;

[0060] (2) Mix the dry material and water in step (1) according to the ratio of material to water ratio of 1:50, and fully stir for 3 to 5 minutes.

[0061] (3) When the dry material in step (1) is fully dispersed in water and the initial viscosity (40-50 mPa.s) is released, grouting starts.

[0062] (4) The total grouting time shall not exceed 1h.

[0063] In this example, the modified cellulose ether is a non-ionic cellulose ether (HEC) surface-treated with glyoxal; the suspending agent is prepared by granulating a 60% ethanol solution and cellulose ether (HEC), with a particle size of 50 ~60 mesh.

[0064] T...

Embodiment 2

[0067] (1) Preparation of dry material: take 2300 parts of modified cellulose ether, 350 parts of suspending agent, NaHCO 3 50 parts of citric acid, 10 parts of citric acid, 50 parts of preservatives, 40 parts of sodium hydroxymethyl glycinate, 50 parts of hydroxyethyl urea powder, 50 parts of anti-foaming agent, mixed evenly to prepare dry material;

[0068] (2) Mix the dry material and water in step (1) according to the ratio of material to water ratio of 1:40, and fully stir for 3 to 5 minutes.

[0069] (3) When the dry material in step (1) is fully dispersed in water and the initial viscosity (40-50 mPa.s) is released, grouting starts.

[0070] (4) The total grouting time shall not exceed 1h.

[0071] In this embodiment, the modified cellulose ether is a non-ionic cellulose ether (HPMC) surface-treated with glyoxal; the suspending agent is prepared by granulating 50% ethanol solution and cellulose ether (HPMC), with a particle size of 50 ~60 mesh.

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Abstract

The invention relates to a mining environment-friendly degradable gel drilling sealing material and a preparation method thereof, the mining environment-friendly degradable gel drilling sealing material comprises water, modified cellulose ether and an additive according to a mass ratio of 100: (2-3): (0.5-0.6); the modified cellulose ether is non-ionic cellulose ether subjected to glyoxal surface treatment, the additive comprises a suspending agent, the suspending agent is prepared by granulating a 40-80% ethanol solution and cellulose ether, and the particle size is 40-100 meshes. The mining environment-friendly degradable gel drilling sealing material disclosed by the invention has the following beneficial effects that sedimentation and water separation of slurry of an existing environment-friendly phase change gel drilling sealing material along with time are eliminated, and uniformity and stability of the gel material are ensured.

Description

technical field [0001] The invention belongs to the technical field of borehole sealing, and in particular relates to a mining environment-friendly degradable gel borehole sealing material and a preparation method thereof. Background technique [0002] Drilling hole sealing is the core basis of underground coal mine gas extraction, which directly determines the concentration, cost, efficiency and utilization rate of gas extraction. Sealing parameters, sealing materials and supporting equipment are the three elements of drilling hole sealing. Among them, sealing material is the most important material guarantee for the quality of drilling hole sealing. At present, the widely used drilling sealing materials in coal mines in my country mainly include two types: cement-based inorganic and chemically reactive urethane, and they are all non-degradable materials of reaction consolidation type. With the increase of coal mining depth, high-stress, tectonic and low-permeability coal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/28C08L61/32C08L83/12C08L91/00C12N9/24C12N9/26C12N9/42
CPCC08L1/284C12N9/2414C12N9/2448C12N9/2445C12N9/248C12Y302/01021C12Y302/01073C12Y302/01001C08L2201/06C08L61/32C08L83/12C08L91/00
Inventor 郝晋伟舒龙勇杨伟东霍中刚李阳凡永鹏
Owner CCTEG CHINA COAL RES INST
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