As a method concerning both cost and time effective,inner string cementing technique has been popularly used for large-size casing and upper casing cementing operations.

• 内管注水泥技术是针对大尺寸套管和表层套管固井的特点及特殊要求而采用的一种固井技术,具有省时、替量少等特点,在现场得到大量推广应用。