Converting drilling fluids to cementitious compositions

Wells – Processes – Cementing – plugging or consolidating

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Details

175 65, 106708, C04B 712, C04B 728, E21B 3314

Patent

active

052955435

ABSTRACT:
Methods of drilling a well bore utilizing a circulating drilling fluid and subsequently disposing of the drilling fluid by converting it to a cementitious composition are provided. The methods basically comprise the steps of forming the drilling fluid with an aqueous suspension of condensed silica fume as a component thereof, drilling a well bore using the drilling fluid, activating the drilling fluid whereby it will subsequently set into a hard cementitious mass and placing the set activated drilling fluid in one or more desired locations whereby it sets therein.

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Malhotra et al., "Silica Fume Concrete--Properties, Applications, and Limitations", Concrete International, May 1983, pp. 40-46.

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