Patent ID: 9488019
Filing Date: 2016-11-08
CPC Classification: C09K,E21B

Claim Text:
1. A method comprising: drilling at least a portion of a wellbore penetrating a subterranean formation with a drilling fluid that comprises a base fluid, a plurality of micro-electro-mechanical systems lost circulation materials (MEMS-LCMs), and a plurality of lost circulation materials (LCMs), wherein the MEMS-LCMs and the LCMs are substantially similar in size, shape, and specific gravity; measuring a first concentration of the MEMS-LCMs in the drilling fluid before circulating the drilling fluid through the wellbore; measuring a second concentration of the MEMS-LCMs in the drilling fluid after circulating the drilling fluid through the wellbore; performing a comparison of the first and second concentrations of the MEMS-LCMs; and changing a composition of the drilling fluid based on the comparison.