工业技术创新Issue(3)：359-365,7.DOI:10.14103/j.issn.2095-8412.2015.03.018
水基钻井液用无铬降粘剂腐植酸接枝聚丙烯腈的制备及其降粘特性
Preparation and Properties of Humic Acid Grafted Polyacrylonitrile Copolymer as A New Chromium-Free Thinner for Water-Based Drilling Fluid
孟繁奇 1薛伟 1张志磊 1周风山1
作者信息
- 1. 中国地质大学 北京 材料科学与工程学院，北京，100083
- 折叠
摘要
Abstract
With the increase of the world's energy needs and the advanced drilling techniques, more and more deep even more ultra deep wells were developed. In drilling, the hole deeper, the higher the temperature within the wellbore, and the water based drilling fluids tend to thickening. Thinner (viscosity reducer) is the indispensable of drilling fluid additive in the drilling process. It plays a very important role in adjusting the rheological characteristics of drilling fluid. The most used commercial drilling fluid thinner is the ferric chomium lignin sulfonate (FCLS), it is a superior to resistance temperature and resistance to salt, but it contains environmentally hazardous chromium ions, so it has banned to use for so many years. Therefore, to develop a new non-toxic and harmless thinner is imperative. <br> A new chromium-free thinner for water based drilling fluid was produced through the grafted copolymerization used the humic acid and polyacrylonitrile as the main raw materials. By using a composite cross-linking agent composed by zinc acetate and urea greatly improved the temperature tolerance and salt resistance of the produced product. The paper investigated the effect of the compositions of humic acid, optimized hydrolysis and degradation conditions of polyacrylonitrile, analyzed the mechanism of the composite cross-linking agent, improved the sedimentation stability of the produced product slurry before spray drying, evaluated the performances of the new thinner in different based drilling fluid, and established an experimental method to evaluate a thinner's comprehensive properties. The new thinner would not only solve the chromium pollution compared with FCLS, but also reduce the thinner's production cost. The new thinner product has a higher market competition in future.关键词
钻井液降粘剂/接枝聚合物/腐植酸/聚丙烯腈/抗温性/抗盐性Key words
Drilling fluid thinner/Grafted copolymer/Humic acid/Polyacrylonitrile/Temperature tolerance/Salt resistance分类
能源科技引用本文复制引用
孟繁奇,薛伟,张志磊,周风山..水基钻井液用无铬降粘剂腐植酸接枝聚丙烯腈的制备及其降粘特性[J].工业技术创新,2015,(3):359-365,7.
