Preparing method of silicon viscosity reducer for drilling fluid

Abstract

The invention discloses a preparing method of a silicon viscosity reducer for the drilling fluid, comprising steps: step one, adding proper water in a reactor, then feeding methyl chlorosilane, stirring and reacting for generating mixed solution, cooling the mixed solution; step two, adding aqueous alkali into the cooled reaction solution for complete reaction, feeding aluminium sulphate solution, stirring and reacting for a period, forming the silicon viscosity reducer for the drilling fluid. The prepared viscosity reducer has strong high-temperature (more than 240 DEG C) resistance and high compatibility with the other substances, good mud stream rheological property, dilution, viscosity reduction property and lubricating property. The working substance content is higher or equal to 16%; the chloride content is lower or equal to 10% and the viscosity reduction ratio is higher or equal to 80% at the room temperature and the viscosity reduction ratio at 220 DEG C for 16 hours is higher than or equal to 70%.

Description

Technical field [0001] The invention relates to a preparation method of a silicon viscosity reducer for drilling fluid. Background technique [0002] The current silicon viscosity reducers have relatively weak resistance to high temperature and have poor compatibility with other products. Summary of the invention [0003] The invention provides a method for preparing a silicon viscosity reducer for drilling fluids. The prepared viscosity reducer not only has strong resistance to high temperature, but also has good viscosity reduction performance. [0004] The present invention adopts the following technical scheme: a method for preparing a silicon viscosity reducer for drilling fluid, which includes the following steps: step one, adding an appropriate amount of water to the reactor, then adding methylchlorosilane, and then performing a stirring reaction After the mixed solution is formed, the mixed solution is cooled after the reaction is completed; step two; after cooling, an a...

AI Technical Summary

Problems solved by technology

[0002] The current silicon viscosity reducer has relatively weak high temperature resistance and poor compatibility with other products