Solid Lubricant Polysaccharide Derivatives for Drilling Fluid

Abstract

The invention relates to a solid lubricant glycan derivative for a drilling fluid. Raw materials of the derivative comprise, 30-40 parts of hydroxypropyl guanidine gum, 3-4 parts of propylene epoxide,0.1-0.15 part of sodium hydroxide, 20-30 parts of dodecyl alcohol, 0.15-0.2 part of a catalyst, 10-20 parts of white oil, 2-5 parts of a surfactant, 0.1-2 parts of an antifoaming agent, 10-20 parts of mica powder, 1-3 parts of a bactericide, 6-10 parts of ethanol and 10-25 parts of water. A preparation method includes the steps that the hydroxypropyl guanidine gum, the sodium hydroxide and the water are added into a reaction still and stirred continuously, and the propylene epoxide is added for stirring, refluxing and a reaction; a reaction solution is heated, the catalyst is added, and a mixed solution of the ethanol and the dodecyl alcohol is added under stirring for a reaction; the reaction material solution is cooled to the room temperature, the white oil, the surfactant, the antifoaming agent, the mica powder and the bactericide are added, stirred uniformly, dried and ground into powder, and then the derivative is obtained. The lubricating coefficient reduction rate is higher than or equal to 90%, the derivative has good high-temperature drop reduction performance and salt resistance, the preparation conditions are easily achieved, and the derivative is environmentally friendly.

Description

technical field [0001] The invention relates to a petroleum drilling fluid additive, in particular to a solid lubricant polysaccharide derivative for drilling fluid. The invention also relates to a preparation method of the polysaccharide derivative of the solid lubricant for drilling fluid. Background technique [0002] Drilling fluid lubricant is one of the main treatment agents for drilling fluid. It is mainly used to reduce the friction between the drilling tool and the well wall, so as to effectively avoid the occurrence of downhole accidents such as pipe sticking. In recent years, with the emergence of complex well structures such as deep wells, ultra-deep wells, and extended-reach wells, the conditions of high friction, high torque, and high temperature in drilling have put forward higher requirements for the lubricating performance of lubricants used in drilling fluids. At the same time, as the world's environmental protection requirements become increasingly string...

AI Technical Summary

Problems solved by technology

This technology does not produce polysaccharide derivatives in the traditional sense, but only solid lubricants

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