The abnormal phenomenon of class G oil well cement endangering the cementing security in the presence of retarder

详细信息    查看全文

• 作者：Shenglai Guo ; ^{laishengguo@163.com" class="auth_mail} ; ^{guoshenglaiupc@163.com" class="auth_mail} ; Yuhuan Bu ; Huajie Liu ; Xinyang Guo
• 关键词：Oil well cement ; Calcium aluminoferrite ; Retarder ; CaO
• 刊名：Construction and Building Materials
• 出版年：15 March, 2014
• 年：2014
• 卷：54
• 期：Complete
• 页码：118-122
• 全文大小：665 K

文摘

Aiming at the abnormal phenomenon of the setting time of the cement slurry with retarder at around 85 掳C surpassing the low temperature, the effect of retarder dosage, the dosage of extra lime (CaO), the mixing mode of the extra lime (CaO), and the precuring of the cement slurry at high temperature on the setting time of cement slurry were studied. The setting time of the cement slurry without the retarder changed a little as the increase of the dosage of the extra lime while the setting time of cement slurry with the retarder shortened obviously. The free lime contained in the cement itself had a great influence on the setting time of the cement slurry with the retarder. The content drop of the Ca(OH)₂ in the cement slurry induced by the reaction acceleration between C₄AF and Ca(OH)₂ was responsible for the abnormal phenomenon.