A fibre-reinforced, low density cement system for the control of lost circulation during the drilling of subterranean wells, generally comprising a cement particle mixture having a specific granulometric characterization and alkaline resistant fibres, such as fibres composed of glass having a high zirconia concentration or organic fibres composed of a phenolic polymer or other polymeric system.

 
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> Low-density cement compositions, density-reducing additives, and methods of use

> Low-density cement compositions, density-reducing additives, and methods of use
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