Multifunctional oligomeric lubricant for drilling fluid and preparation method thereof

Abstract

The invention relates to the technical field of a lubricant for drilling fluid and a preparation method thereof; the multifunctional oligomerized lubricant for drilling fluid is composed of raw materials in parts by weight 30 parts to 45 monomer A 、 15 parts to 20 monomer B 、 45 parts to 70 part solvent, 0.05 parts to 0.2 parts initiator. According to the invention, the multifunctional oligomeric lubricant for drilling fluid is obtained by targeted block copolymerization of corresponding unsaturated fatty acids. The invention of the multifunctional oligomeric lubricant for drilling fluid can form a layer of lipophilic and hydrophobic film on the surface of the mud cake formed by the drilling fluid, which has a good effect on protecting oil and gas layers, thereby achieving the purpose of one agent with multiple effects; at the same time, the invention When the drilling fluid is added with a multi-functional oligomeric lubricant, other additives will be added less or even not, thus reducing the drilling cost, reducing the loss of resources, and is also conducive to environmental protection.

Description

technical field [0001] The invention relates to the technical field of a drilling fluid lubricant and a preparation method thereof, and relates to a multifunctional oligomerized lubricant for drilling fluid and a preparation method thereof. Background technique [0002] In the past, the materials used in the lubricants used in major oil fields basically used relatively simple grease materials and various oil products. Due to the single structure and weak low temperature resistance, condensation will occur when the temperature difference between day and night is large in the north. Analysis, stratification or even freezing phenomenon, it is difficult for this type of product to play its due effect at this time. The current lubricant system for drilling fluid is basically a compound system, and its lubricating effect is maintained only by the existing length of the lipophilic chain of the grease and the corresponding addition amount, which is not conducive to operation and env...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a multifunctional oligomeric lubricant for drilling fluid and its preparation method, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the current Lubricants for drilling fluids need to be added with multi-functional drilling aids, but there are problems of high cost and limited application, which lead to resource loss and are not conducive to environmental protection.