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Method for preparing plugging agents

A leak-stopping agent and the technology of preparation steps, which are applied in the field of preparation of leak-stopping agents, can solve the problems of poor water absorption and swelling capacity, poor tolerance of chemical leak-stopping agents, etc., and achieve the effect of improving thermal stability

Inactive Publication Date: 2017-08-11
石磊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a preparation method of the chemical plugging agent for the disadvantages of the chemical plugging agent’s poor bearing capacity and poor water absorption and swelling capacity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0023] In terms of parts by weight, weigh 50 parts of diatomite, 20 parts of bentonite, 30 parts of sepiolite, 50 parts of walnut shells, 80 parts of blast furnace slag and 10 parts of gypsum, stir and mix them and add them to a pulverizer for pulverization. Mesh sieve, mixed powder is obtained, mixed powder is added in water by mass ratio 1:20, uses mixer to stir and mix 30min with 600r / min rotating speed, obtains suspension; Collect 300g milky liquid from Hevea brasiliensis, be latex liquid, to latex 5% ground calcium carbonate by mass of latex, 4% carboxymethyl cellulose by mass of latex and 10% polyamide fiber by mass of latex were added to the liquid in sequence, heated to 60°C after mixing, and stirred for 1 hour to obtain latex mixture; Add 1% silane coupling agent KH-550 to the latex mixture, and ultrasonically treat it at 80KHz power for 20 minutes, and perform vacuum degassing for 10 minutes after ultrasonic treatment, and obtain modified latex after vacuum degassing;...

example 2

[0026]In terms of parts by weight, weigh 70 parts of diatomite, 40 parts of bentonite, 50 parts of sepiolite, 100 parts of walnut shells, 100 parts of blast furnace slag and 20 parts of gypsum, stir and mix them and add them to a pulverizer for pulverization. Mesh sieve to get mixed powder, mixed powder is added in water by mass ratio 1:20, use mixer to stir and mix 50min with 800r / min rotating speed, get suspension; Collect 500g milky liquid from Hevea brasiliensis, be latex liquid, to latex Add 10% ground calcium carbonate by mass of latex, 6% carboxymethyl cellulose by mass of latex and polyamide fiber 15% by mass of latex to the liquid in turn, heat to 80°C after mixing, keep stirring for 2 hours to obtain the latex mixture; Add the latex mixture 3% silane coupling agent KH-550 to the latex mixture, and ultrasonically treat it at 120KHz power for 30min, and perform vacuum degassing for 15min after the ultrasonic treatment, and obtain a modified latex after vacuum degassing;...

example 3

[0029] In terms of parts by weight, weigh 60 parts of diatomite, 30 parts of bentonite, 40 parts of sepiolite, 75 parts of walnut shells, 90 parts of blast furnace slag and 15 parts of gypsum, stir and mix them and add them to a pulverizer for pulverization. Mesh sieve, get mixed powder, mixed powder is added in water by mass ratio 1:20, use agitator to stir and mix 40min with 700r / min rotating speed, get suspension; Collect 400g milky liquid from Hevea brasiliensis, be latex liquid, to latex Add 8% ground calcium carbonate by mass of latex, carboxymethyl cellulose 5% by mass of latex and polyamide fiber 13% by mass of latex to the liquid in sequence, heat to 70°C after mixing, keep stirring for 1.5h to obtain latex mixture; Add 2% silane coupling agent KH-550 of the latex mixture into the latex mixture, and ultrasonically treat it for 25 minutes at a power of 100KHz. After the ultrasonic treatment, vacuum defoaming is carried out for 12 minutes, and the modified latex is obtai...

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Abstract

The invention belongs to the technical field of a sealing-up and plugging materials, and particularly relates to a method for preparing plugging agents. The method includes smashing diatomaceous earth, bentonite, sepiolite and the like and mixing and stirring the diatomaceous earth, the bentonite, the sepiolite and water to obtain suspension; collecting emulsion from rubber trees, mixing and heating the emulsion, heavy calcium carbonate, carboxymethyl celluloses and polyamide fibers to obtain first mixtures; adding silane coupling agents into the first mixtures and carrying out ultrasonic treatment to obtain modified natural emulsion; mixing, heating and stirring the modified natural emulsion and lauroyl diethanolamine solution to obtain second mixtures, adding initiators, the suspension and cross-linking agents into the second mixtures, stirring the second mixtures, the initiators, the suspension and the cross-linking agents to obtain third mixtures and adding acrylamide solution into the third mixtures; carrying out reaction and then discharging and drying reaction products to obtain the plugging agents. The method has the advantages that the plugging agents prepared by the aid of the method are high in blocking speed and plugging success rate, formed plugging layers are high in loading capacity, good plug forming effects can be realized, repeated leakage can be prevented, and the plugging agents are little in environmental influence and free of pollution, are non-toxic and can be constructed safely and quickly.

Description

technical field [0001] The invention belongs to the technical field of water-stopping and leak-stopping materials, and in particular relates to a preparation method of a leak-stopping agent. Background technique [0002] Currently commonly used plugging materials are mainly divided into physical plugging materials and chemical plugging materials: physical plugging materials mainly include bridging plugging materials and high water loss plugging materials. The bridging plugging material is mainly based on the principle of particle gradation, using walnut shells, mica flakes, rice husks, cottonseed husks, sawdust, etc. of different particle sizes for different crack sizes, so as to seal the leaky layer. Its main disadvantage is that when it is difficult to judge the opening size of underground fractures or the open hole leakage section is long, and there are various types of fractures or holes, it is difficult to reasonably match the particle size of the leakage plugging agent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/467C08F253/00C08F222/38C08F220/56
CPCC09K8/467C08F253/00C09K8/426C09K2208/08C08F222/385C08F220/56
Inventor 石磊葛明月李雪晴
Owner 石磊
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