Preparation and Study of BCL-NS Early Strength Agent for Low Temperature Oil Well Cement
A low-temperature oil well cement early strength agent BCL-NS has been developed to address the challenges of slow early strength development,low strength,and long cementing waiting time of ordinary Portland cement slurry in low-temperature cementing operations such as deep water,deep sea,and polar regions.BCL-NS is made of 3%emulsifier SR-10 plus 1.6%water reducer J112 as primer,Na2 SiO3·5H2 O dissolved in water plus 0.2%water reducer J112 as silica material solution,Ca(NO3)2·4H2 O plus or minus 0.2%water reducer J112 as calcium material solution,3%PVA1788 as protective colloid after dropping at 20℃for 4 h,and 0.5%white carbon black as anti caking agent after spray drying.The indoor test evaluation shows that after adding 2%early strength agent BCL-NS to the oil well cement slurry,the 1-day compressive strength increases by 82%,the 1-day flexural strength increases by 15.2%,and the 3-day flexural and compressive strength also increases by more than 15%.
low temperature early strength agentoil well cementflexural and compressive strengthsiliceous material
万方数据
维普
