Compound oil-soluble viscosity reducer for reducing viscosity of thickened oil and preparation method of compound oil-soluble viscosity reducer

An oil-soluble viscosity reducer and viscosity reduction technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as poor viscosity reduction effect of viscosity reducer, high amount of thin oil added, and practical application limitations , to achieve the effect of good viscosity reduction, low amount of thin oil, and less use
CN104232050AInactive Publication Date: 2014-12-24NABAI KECHUANG BEIJING TECH DEV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NABAI KECHUANG BEIJING TECH DEV
Publication Date
2014-12-24
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention relates to a compound oil-soluble viscosity reducer for reducing viscosity of thickened oil and a preparation method of the compound oil-soluble viscosity reducer. The compound oil-soluble viscosity reducer is compounded of a ternary oil-soluble copolymer and an oil-soluble fatty alcohol polyoxyethylene ether nonionic surfactant. The compound oil-soluble viscosity reducer is characterized by comprising the following contents: 1) preparing octadecyl methacrylate; 2) preparing SMA which is a maleic anhydride-styrene-octadecyl methacrylate copolymer; 3) preparing SMZA which is an ester copolymer of maleic anhydride-styrene-acrylamide and higher alcohols; and 4) compounding the SMA or SMZA copolymer with a surfactant, wherein the mass ratio of the surfactant to the terpolymer is (0.5-1) to (1-3), and adding a solvent and stirring for an hour at 60 DEG C. The compound oil-soluble viscosity reducer is wide in raw material source, low in price, free of pollution, and simple in synthetic process, and has a wide market prospect.
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Description

technical field

[0001] The invention relates to a compound oil-soluble viscosity reducer for heavy oil viscosity reduction and a preparation method thereof. Background technique

[0002] Due to the continuous demand for oil and the continuous decline in the recoverable volume and production of conventional crude oil, we must pay attention to the recovery of heavy oil and poor quality remaining oil. However, the high viscosity of heavy oil has brought difficulties to production, gathering, transportation and processing. The fundamental reason is that heavy oil has high colloid and asphaltene content and high molecular microscopic polymerization degree. In order to solve this problem, many scholars at home and abroad have studied the oil-soluble viscosity reducer for heavy oil.

[0003] The research and application of oil-soluble viscosity reducers for heavy oil abroad are mostly fluidity improvers mainly based on pour point depressants. This kind of improver can effectively...

Claims

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