Patent ID: 8530393
Filing Date: 2013-09-10
Classification: C09K

Abstract:
1. A method comprising: providing a test drilling fluid comprising a test base fluid and a plurality of test particulates, wherein a first normal stress difference of the test drilling fluid without the plurality of test particulates is characterized by having a normal stress of N testing the test drilling fluid with the minimum concentration of the test particulate with the rheological procedure to determine a normal stress of N calculating Δ providing a drilling fluid comprising a base fluid and a plurality of particulates, wherein a first normal stress difference of the drilling fluid without the plurality of particulates is characterized by having a normal stress of N testing the drilling fluid with a concentration of the particulates with the rheological procedure to determine a normal stress of N calculating Δ adjusting the concentration of the plurality of particulates in the drilling fluid by comparing the value of a first normal stress difference of the drilling fluid (ΔN