A preparation method of instant guar gum suitable for continuous mixing under low temperature conditions

Abstract

The invention relates to a method for preparing instant guar gum applicable to continuous blending under a low temperature condition. The method comprises the following steps: performing chemical modification and neutral reaction on guar gum pieces in a kneading machine so as to prepare hydroxypropyl guar gum pieces, adding a nano material and a surfactant to perform surface modification so as to obtain a surface modification material, subsequently performing a grinding technique based on a four-roller machine, a succeeding stretch and tackifying technique, a turbulent flow drying technique and an airflow vortex micro powder crushing and separation technique on the surface modification material so as to obtain the instant guar gum applicable to continuous blending under the low temperature condition. By adopting the method, the difficult problem of construction in winter and autumn in northern areas can be solved, the complex separation and purification processes of washing in alcohol and water are omitted, and the method has the characteristics of freedom of wastewater and waste gas discharge in the reaction process, safety, environment friendliness, simple process, low cost, high reaction efficiency and good guar gum instant solubility.

Description

technical field

[0001] The invention belongs to the field of natural polymer chemistry, and relates to the preparation of guar gum fracturing fluid under the condition of minus 20°C to 30°C in winter in the north, especially a kind of guar gum sheet or guar gum powder as raw material which is suitable for low temperature conditions The preparation method of the instant guar gum of down continuous mixing. Background technique

[0002] Hydraulic fracturing is the main technique for increasing oil and gas production in tight oil and gas reservoirs, and fracturing fluid is the key factor for the success of fracturing. At present, water-based fracturing fluid is mainly used, and its thickening agent is mainly guar gum and its derivatives. things. Most of PetroChina's oilfields are located in the northern region, and the construction time in spring and winter accounts for 1 / 3 of the whole year. Due to the fact that the existing guar gum thickener has poor solubility or basically ...

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