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Borehole stabilizer for drilling fluid, preparation method and applications thereof

A wellbore stabilizer and drilling fluid technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor temperature resistance, high cost, limited use, etc., to achieve good temperature resistance, low cost, The effect of improving quality

Inactive Publication Date: 2015-08-12
北京中科日升科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, asphalt products usually have fluorescence, which affects geological logging, so their use is limited; polymer treatment agents mainly inhibit clay hydration and dispersion and prevent mud shale from collapsing through adsorption and coating, but polymer treatment agents Usually poor temperature resistance and high cost

Method used

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  • Borehole stabilizer for drilling fluid, preparation method and applications thereof
  • Borehole stabilizer for drilling fluid, preparation method and applications thereof
  • Borehole stabilizer for drilling fluid, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Weigh 36.0Kg of deionized water into the reactor, turn on the stirring device, add 1.0Kg of sodium hydroxide into the reactor, stir fully to dissolve the alkali completely; weigh 5.0Kg of sodium humate and 25.0Kg of phenolic resin Add in the reaction kettle one by one, stir to make it mix evenly, and control the temperature between 30~40°C at the same time; prepare 0.1Kg of tartaric acid into an aqueous solution with a mass fraction of 56%, add the aqueous solution of tartaric acid into the reaction kettle, and fully stir for 10 Minutes, keep the reaction temperature between 30-40°C; then weigh 5.0Kg of aluminum sulfate and slowly add it into the reaction kettle, stir rapidly, control the temperature at 60-70°C, and react at constant temperature for 2.0 hours. After the reaction is complete, the product is dried and pulverized at 100°C to obtain the product.

Embodiment 2

[0034] Weigh 59.0Kg of deionized water into the reactor, turn on the stirring device, add 3.0Kg of potassium hydroxide into the reactor, stir fully to dissolve the alkali completely; weigh 25.0Kg of potassium humate and 5.0Kg of sulfonated Add the sulfonated phenolic resin from the tannin extract to the reaction kettle in turn, stir to make it evenly mixed, and at the same time control the temperature between 40 and 50°C; prepare 0.5Kg of sodium pyrosulfite into an aqueous solution with a mass fraction of 54% and add it to the reaction kettle. Fully stir for 20 minutes, keep the reaction temperature between 40-50°C; then weigh 15.0Kg of aluminum sulfate and slowly add it into the reaction kettle, stir rapidly, control the temperature at 60-70°C, and react at constant temperature for 3.0 hours. After the reaction is complete, the product is dried and pulverized at 100°C to obtain the product.

Embodiment 3

[0036] Weigh 42.0Kg of deionized water into the reaction kettle, turn on the stirring device, add 2.0Kg of potassium hydroxide into the reaction kettle, stir fully to dissolve the alkali completely; weigh 15.0Kg of ammonium humate and 15.0Kg of sulfonated Add lignin sulfonated phenolic resin into the reaction kettle in turn, stir to make it evenly mixed, and control the temperature between 40 and 50°C at the same time; prepare 0.3Kg sodium citrate into an aqueous solution with a mass fraction of 59% and add it to the reaction kettle , fully stirred for 30 minutes, and kept the reaction temperature between 40-50°C; then weighed 15.0Kg of aluminum chloride and slowly added it to the reaction kettle, stirred rapidly, controlled the temperature at 70-80°C, and reacted at constant temperature for 2.0 hours. After the reaction is complete, the product is dried and pulverized at 100°C to obtain the product.

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Abstract

The invention relates to a borehole stabilizer for drilling fluid, a preparation method and applications thereof. The borehole stabilizer is prepared by reacting humic acid substances (5 to 25 parts by weight) and resin derivatives (5 to 25 parts by weight) with aluminum salts (5 to 20 parts by weight) in the presence of alkali (1 to 5 parts by weight) and catalyst (0.1 to 0.5 parts by weight). The borehole stabilizer has a good temperature resistant performance, can improve the mud cake quality at a high temperature, reduces the filter loss, and inhibits the clay hydration. Moreover, the borehole stabilizer can generate aluminum compound precipitate through physical and chemical reactions to seal the cracks in stratum during the drilling process so as to stabilize the borehole, the preparation method is simple, the conditions are mild, the conversion rate is high, the cost is low, no post-treatment is required, no waste gas, waste water or waste solid is generated, and the borehole stabilizer is green and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of additives for oilfield drilling fluids, and in particular relates to a well wall stabilizer for drilling fluids and a preparation method and application thereof. Background technique [0002] Borehole wall instability is one of the downhole complex situations often encountered in drilling engineering, which seriously affects the acquisition of geological data, drilling speed, drilling quality and cost. For some new exploration areas, the target layer cannot be drilled due to the instability of the well wall, which will delay the exploration and development speed and affect the economic benefits. The essence of borehole wall instability is mechanical instability. Wellbore instability occurs when the stress on the wellbore rock exceeds its strength. The causes of wellbore instability are complex, which can be summarized into three aspects: mechanical factors, physical and chemical factors, and engineering...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/03C09K8/514
Inventor 孙保明王会
Owner 北京中科日升科技有限公司
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