DRILLING FLUIDS COMPRISING SUB-MICRON PRECIPITATED BARITE AS A COMPONENT OF THE WEIGHTING AGENT AND ASSOCIATED METHODS

摘要

An embodiment of the present invention includes a method comprisingcirculating a drilling fluid in a well bore,wherein the drilling fluid comprises a carrier fluid; and a weighting agentthat comprises precipitated barite having a weight averageparticle diameter below about 1 micron and a particle having a specificgravity of greater than about 2.6. Another embodiment ofthe present invention includes a drilling fluid comprising: a carrier fluid;and a weighting agent that comprises precipitated baritehaving a weight average particle diameter below about 1 micron, and a particlehaving a specific gravity of greater than about 2.6.Another embodiment of the present invention includes a weighting agent thatcomprises precipitated barite having a weight averageparticle diameter below about 1 micron, and a particle having a specificgravity of greater than about 2.6.