材料科学
纳米复合材料
钻井液
热稳定性
热重分析
傅里叶变换红外光谱
复合材料
纳米-
流变学
化学工程
钻探
工程类
冶金
作者
Hao Wang,Ming Li,Gang Liu,Jie Wu,Kun Sun,Qiwei Mou,Chunhua Zhang
标识
DOI:10.1007/s10965-022-03070-x
摘要
In the paper, nano-silica (nano-SiO2)/Welan gum (RSWG) nanocomposite was synthesized as thickener to improve the sedimentation stability of high-temperature drilling fluid. Experimentally, Fourier transform infrared spectrum (FTIR) analysis, X-ray photoelectron spectrum (XPS) analysis, and thermogravimetric analysis (TGA) were conducted for chemical structure analysis of the synthesized product. As a result, test results showed that nano SiO2 was successfully grafted onto Welan gum through the silanization coupling technique. Also, by using nano-silica (nano-SiO2)/Welan gum nanocomposite (RSWG) thickener, water-based drilling fluid was found the excellent resistance to rheological sedimentation via the testing of 16-h thermal aging. The temperature resistance of water-based drilling fluid was up to 220 ℃. And when 1.5 wt.% nano-silica (nano-SiO2)/Welan gum (RSWG) nanocomposite thickener was used, the density deviation of the high-density drilling fluid (2.30 g/cm3) at 220 ℃ was kept at 0.02 g/cm3. Also, no free water was precipitated out. It is found that Welan gum can avoid being damaged by drilling environment caused by high temperature and high-shearing effect. As a reconstructed nanocomposite structure, nano SiO2 and coupling agent have constructed the outer covalent-bonded protection shell, and they show excellent thermal insulation effect and better resistance to mechanical shear for protecting the flexible and polymeric structure of Welan gum. Thus, the use of nano-silica (nano-SiO2)/Welan gum (RSWG) nanocomposite offers us a better understanding and potential opportunity for using polymer component to develop new types of clayless or clay-free water-based drilling fluid systems for the high-temperature drilling industry.
科研通智能强力驱动
Strongly Powered by AbleSci AI