Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effects of chitosan treatment on strength and thickening properties of oil well cement
Highlights We study the influence of chitosan on cement under downhole temperature condition. Chitosan has negative effects on oil well cement due to active group. Chelating pretreatment will weaken the retarding effect of chitosan. Effects of LMW chitosan on cement are more acute than that of HMW chitosan. HMW chitosan is fit for using as coating material in oil well cement.
Abstract The research objectives were to investigate the influence of chitosan on strength and thickening properties of oil well cement under the downhole temperature condition. The results showed that the chitosan has the ability to increase the thickening time, but due to chelating Ca2+ ion, it may cause consistency wave at initial stage, and shorten thickening time at higher dosage and higher temperature. Chelating pretreatment will weaken the retarding effect of chitosan. Effects of LMW chitosan on strength and thickening properties are more acute than that of HMW chitosan. Because of increasing induction period, the pre-chelating LMW chitosan extends thickening time.
Effects of chitosan treatment on strength and thickening properties of oil well cement
Highlights We study the influence of chitosan on cement under downhole temperature condition. Chitosan has negative effects on oil well cement due to active group. Chelating pretreatment will weaken the retarding effect of chitosan. Effects of LMW chitosan on cement are more acute than that of HMW chitosan. HMW chitosan is fit for using as coating material in oil well cement.
Abstract The research objectives were to investigate the influence of chitosan on strength and thickening properties of oil well cement under the downhole temperature condition. The results showed that the chitosan has the ability to increase the thickening time, but due to chelating Ca2+ ion, it may cause consistency wave at initial stage, and shorten thickening time at higher dosage and higher temperature. Chelating pretreatment will weaken the retarding effect of chitosan. Effects of LMW chitosan on strength and thickening properties are more acute than that of HMW chitosan. Because of increasing induction period, the pre-chelating LMW chitosan extends thickening time.
Effects of chitosan treatment on strength and thickening properties of oil well cement
Liu, Huajie (Autor:in) / Bu, Yuhuan (Autor:in) / Sanjayan, Jay (Autor:in) / Shen, Zhonghou (Autor:in)
Construction and Building Materials ; 75 ; 404-414
21.11.2014
11 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Effects of chitosan treatment on strength and thickening properties of oil well cement
| Online Contents | 2015