| abstract |
The present invention relates to compositions for drilling and / or maintaining a well bore, for example drilling fluids and drilling muds, comprising oleaginous yeast. the oleaginous yeast may comprise at least about 45% by weight of oil. the oleaginous yeast may comprise a genetic modification that either increases the yeast oil content, alters the yeast lipid composition, and / or provides a selective advantage for yeast, for example over an unmodified yeast thereof. species. |