... Jobs in an effort to fillan uncemented annulus, isolate zones, and protect casing. This added expensehas led operators to try various low density cementing systems. A system thathas proven to be effective where others often fail is foam cement. Not onlydoes this low density, high strength cement solve...

... Abstract The use of a new ultra low density admixture has been developed which, when used in blends of Portland, Pozzalanic and Gypsumcements, produces cementing slurries with properties of low density and high compressive strength. This material also results in cements having unusually low...