Preparation of a novel amphiphilic comb-like terpolymer as viscosifying additive in low-solid drilling fluid

✍ Scribed by Yan, Lili; Wang, Chengbiao; Xu, Bo; Sun, Jinsheng; Yue, Wen; Yang, Zexing

• Book ID: 121997858
• Publisher: Elsevier Science
• Year: 2013
• Tongue: English
• Weight: 666 KB
• Volume: 105
• Category: Article
• ISSN: 0167-577X
• DOI: 10.1016/j.matlet.2013.04.025

✦ Synopsis

Comb-like polymers have attracted a strong research interest due to their many attractive properties. Novel amphiphilic comb-like terpolymer (PASA), as viscosifying additive for low-solid drilling fluid under high temperature and salinity, was prepared and characterized by FTIR, 1 H-NMR and TGA. PASA possessed excellent thermal stability. The rheological properties, filtration properties and negative Zeta potentials of both freshwater drilling fluid and saturated salt-water drilling fluid were greatly improved by adding PASA before and after thermal aging tests, due to comb-like conformation of PASA, strong electrical double layer force of bentonite particles and stable network structure formed by PASA and bentonite particles.