High density brines for use in wellbore fluids

Details High density brines for use in wellbore fluids High density brines for use in wellbore fluids

C - Chemistry, Metallurgy

09

K

C09K 8/06 (2006.01) E21B 43/00 (2006.01)

Patent

CA 2602004

A composition and method for use in drilling or completing a subterranean well comprising a solids~free, high-density brine composed of alkali metal polytungstate and blends thereof. These high-density brines are also useful as wellbore fluids and other non-oilfield fluids requiring high density properties.

La présente invention a pour objet une préparation et une méthode destinées à forer ou à parfaire un puits souterrain. Lesdites préparation et méthode impliquent une saumure haute densité ne comportant aucun solide et composée de polytungstates de métaux alcalins et de mélanges desdits polytungstates. Ces saumures haute densité peuvent également être employées en tant que fluides de forage ou en tant que fluides pour des applications non pétrolifères nécessitant des fluides haute densité.

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