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Organic high-pressure-resistant borehole sealing resin and preparation method thereof

A sealing resin and anti-high pressure technology, which is used in the field of drilling sealing resin and preparation, can solve the problem of failure to meet the high pressure resistance requirements of hydraulic fracturing drilling, the limited sealing effect of rock mass cracks around the drilling, and the adhesion of the drilling wall. Weak ability and other problems, to save waiting time, improve the success rate of sealing holes, and improve the strength of high pressure

Active Publication Date: 2014-05-14
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Although various polyurethane drilling sealing materials currently used in coal mines have the advantages of fast sealing speed and short curing time, but because polyurethane is a viscous liquid, the penetration ability is weak, and the sealing effect on the cracks in the rock mass around the drilling hole is relatively limited. , which directly affects the sealing quality; in addition, the expansion ratio of the existing polyurethane material is too large, the material's own compression resistance is poor, and the bonding ability with the borehole wall after the reaction is weak, which cannot meet the requirements of hydraulic fracturing drilling. High pressure requirements required for sealing

Method used

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  • Organic high-pressure-resistant borehole sealing resin and preparation method thereof
  • Organic high-pressure-resistant borehole sealing resin and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1: the density of the material in the white material tank is 1.09 ± 0.01g / cm 3 , The viscosity of the material is 230~265cps (22°C).

[0051] Preparation method: Mix 100 parts of white material in the white material tank with 100 parts of black material in the black material tank, react by mechanical stirring, and the free foaming density is 523kg / m 3 , The starting time is 200-205 seconds, the drawing time is 484-502 seconds, and the non-stick time is 814-828 seconds; the finished product has no shrinkage deformation, the expansion ratio is 2.1 times, and the compressive strength is 14.1MPa.

Embodiment 2

[0052] Embodiment 2: the density of the material in the white material tank is 1.08 ± 0.01g / cm 3 , The viscosity of the material is 220~254cps (22°C).

[0053] Preparation method: Mix 100 parts of white material in the white material tank with 100 parts of black material in the black material tank, react by mechanical stirring, and the free foaming density is 423kg / m 3 , The starting time is 195-201 seconds, the drawing time is 478-494 seconds, and the non-stick time is 805-820 seconds; the finished product has no shrinkage deformation, the expansion ratio is 2.6 times, and the compressive strength is 12.6MPa.

Embodiment 3

[0054] Embodiment 3: the density of the material in the white material tank is 1.07 ± 0.01g / cm 3 , The viscosity of the material is 209~244cps (22°C).

[0055] Preparation method: Mix 100 parts of white material in the white material tank with 100 parts of black material in the black material tank, react by mechanical stirring, and the free foaming density is 334kg / m 3 , The starting time is 191-198 seconds, the drawing time is 470-487 seconds, and the non-stick time is 797-811 seconds; the finished product has no shrinkage deformation, the expansion ratio is 3.3 times, and the compressive strength is 11.3MPa.

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Abstract

The invention relates to organic high-pressure-resistant borehole sealing resin, which comprises polyurethane resin mixed components and polyaryl polymethylene isocyanate. The organic high-pressure-resistant borehole sealing resin is characterized in that the polyurethane resin mixed components comprise 100 parts of polyether system by weight, 3-4 parts of foaming stabilizer B8460 by weight, 1.2-2.1 parts of catalyst by weight and 4.8-6 parts of foaming agent by weight; the polyether system comprises 40-60 parts of polyether polyol YD-4110-4 by weight, 30-40 parts of polyether polyol YD-1050 by weight and 10-20 parts of polyether polyol YD-405 by weight; the catalyst comprises 0.4-0.7 part of PC-12 by weight, 0.4-0.7 part of PA-300 by weight and 0.4-0.7 part of PA-400 by weight; the foaming agent comprises 2.4-3 parts of HFC-245fa by weight and 2.4-3 parts of HFC-365mfc; and the ratio of the weight parts of polyurethane resin mixed components to the weight parts of polyaryl polymethylene isocyanate is 100: (100-105). The organic high-pressure-resistant borehole sealing resin has advantages that the permeability is very good, micro-fissures in a borehole can be well filled, the strength of final reaction products is high and the high-pressure resistance is obviously improved; and the bonding force with a coal wall is also enhanced, the resin can be well bonded with the surrounding part of a borehole wall and the requirement on high-pressure resistance required for hydraulically fractured borehole sealing can be satisfied.

Description

technical field [0001] The invention relates to a drilling sealing resin and a preparation method thereof, in particular to a sealing organic anti-high pressure drilling sealing resin suitable for coal mine hydraulic fracturing drilling and a preparation method thereof. Background technique [0002] Although various polyurethane drilling sealing materials currently used in coal mines have the advantages of fast sealing speed and short curing time, but because polyurethane is a viscous liquid, the penetration ability is weak, and the sealing effect on the cracks in the rock mass around the drilling hole is relatively limited. , which directly affects the sealing quality; in addition, the expansion ratio of the existing polyurethane material is too large, the material's own compression resistance is poor, and the bonding ability with the borehole wall after the reaction is weak, which cannot meet the requirements of hydraulic fracturing drilling. High pressure resistance requi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/48C08G18/08C08G101/00
Inventor 林柏泉郝志勇张连军李飞高亚斌
Owner CHINA UNIV OF MINING & TECH
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