Expanding composition of cement slurries for putting cement bridging of lost circulation control

Authors: K.E. Vasileva, A.A. Melekhin, N.I. Krysin (Perm National Research Polytechnical University, RF, Perm)

Key words: well, cement bridging, lost circulation, expanding composition of cement slurries.

Lost circulation during well construction leads to a significant increase in time and cost. The authors developed expanding composition of cement slurries based on portland cement with an expanding polymeric additive to install cement bridging in the zone of loss. The article presents results of the study of the linear expansion dynamics and a set of consistency cement compositions, as well the results of their evaluation of the plugging and storage capacity.

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