In the process of well construction of extended reach wells, complex formations are usually encountered, with narrow pressure window, long open hole section, long cement slurry sealing section, etc. the ECD control requirements are high, which will bring many challenges to the cementing process, such as the difficulty of cleaning before cementing, high requirements for cement slurry system, and high requirements for measures to improve displacement efficiency.

ZORANOC has complete technology of large displacement casing running, well cleaning, casing centering and long-distance precise displacement, suitable for cement slurry system of large displacement wells, software support system for precise simulation of operation ECD, leakage prevention and plugging technology, and rich cementing experience of large displacement wells at sea and on land. In recent years, in the operation of large displacement wells in the South China Sea and the East China Sea, some wells encounter complex strata and faults. Through the implementation of a complete set of cementing technology for large displacement wells, the cementing quality is good.