APPARATUS AND METHOD FOR REVERSE CIRCULATION CEMENTING A CASING IN AN OPEN-HOLE WELLBORE

摘要

A system for cementing a casing (103) in an open wellbore having no surface casing, wherein an annulus (105) is defined between the casing and the wellbore, the system having: an annular plug (120) around the casing at the mouth of the wellbore; a cement composition pump fluidly connected to the annulus through the seal; and a coupling (102) connected to the exposed end of the casing for taking circulation fluid returns from the inner diameter of the casing.