PROCESS OF CASING STRING CEMENTING

摘要

FIELD: well drilling. SUBSTANCE: minimal value of volumetric discharge of pumped cement slurry is calculated by analytical expression. Intensity of crossflow is also computed by analytical expression. Volumetric discharge of cement slurry pumped into casing string is chosen to be above value of intensity of crossflow. Cement slurry is pumped into casing string. Separation cementer is removed. Cement slurry is forced into well clearance. EFFECT: increased cementing quality and prevention of down-hole failures. 3 dwg