Lightweight dry oil-well mixes with retarders for deep boreholes cementing
Investigation of influence of retarder nitriletrimethylphosphonic acid (NTFA) on rheological properties of fresh mixture and physical and mechanical properties of mortar was made. It was defined, that optimal content of admixture is in limits of 0,02-0,08 mass %, depending on geological and industrial conditions of a borehole. With the help of program ORIGIN, dependence of jelling time and bending tensile strength of mortar from the content of NTFA was build.