FIELD: well boring. SUBSTANCE: invention relates to methods for boring holes in underground formations containing oil, gas, and other mineral products in order to production of these products, in particular to drilling fluids used in such methods and to utilization of starch in these fluids. More specifically, invention offers a method involving drilling mud comprising starch obtained from vegetable roots, the starch containing essentially amylopectin matters. In a preferably embodiment of invention, the starch is obtained from genetically modified amylose-free potato. EFFECT: enhanced oil and gas production. 14 cl, 1 dwg, 21 tbl, 15 ex
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