A kind of preparation method of high temperature resistant composite crosslinking agent

Abstract

The invention belongs to the technical field of crosslinking agent preparation, and in particular relates to a preparation method of a high temperature resistant composite crosslinking agent, comprising the following raw materials in parts by weight: 20-40 parts of zirconium oxychloride octahydrate solution, 10 parts of sodium lauryl sulfate solution ‑12 parts, 20‑60 parts of cyclohexane, 15‑25 parts of glycerin, 1.5‑2.5 parts of borax and 3‑4 parts of auxiliary additives; the high temperature resistant composite crosslinking agent is prepared through the following steps: the first step, preparation The first mixture; the second step, preparing the second mixture; the third step, adding auxiliary additives to the obtained second mixture, and reacting for 5-7h at a temperature of 65°C and a rotating speed of 400r / min to obtain a resistant High temperature composite crosslinking agent. The imide ring structure in component A has good high temperature resistance, and the auxiliary additive endows the high temperature resistant composite cross-linking agent with certain antibacterial properties, which can effectively inhibit the growth of bacteria in the vegetable gum, prevent the viscosity from decreasing, and improve the cross-linking performance. Thereby improving the stability of the prepared fracturing fluid.

Description

technical field [0001] The invention belongs to the technical field of crosslinking agent preparation, and in particular relates to a preparation method of a high temperature resistant composite crosslinking agent. Background technique [0002] A cross-linking agent is a substance that bonds multiple linear molecules into a cross-linked network structure. The cross-linking agent is mainly used in polymer materials, because most of the molecular structures of polymer materials are linear long-chain or short-branched. When it is not cross-linked, it usually has low strength, is easy to break, and has poor comprehensive mechanical properties. The function of the cross-linking agent is to generate chemical bonds between the linear molecules, so that the linear molecules are connected to each other to form a cross-linked network structure. [0003] Thickener, also known as thickener, is the most important additive in water-based fracturing fluid. The main function is to increase ...

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Problems solved by technology

[0005] The boron cross-linking agent has poor temperature resistance and the cross-linking speed is too fast; the titanium and zirconium cross-linking agents are organic titanium cross-linking agents and organic zirconium cross-linking agents, which have problems such as damage to the reservoir; the aluminum and antimony cross-linking agents are aluminum Cross-linking agent and antimony cross-linking agent are too harsh for the use environment, need to be cross-linked under acidic conditions, and the applicable temperature is too low

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