FIELD: oil, gas and coke-chemical industries.
SUBSTANCE: invention relates to drilling of oil and gas wells and can be used in composition of clay-free biopolymer drilling muds, which are used for drilling in complex mining and geological conditions, including in chemogenic deposits, as well as directional and horizontal sections of wells. Composition for drilling mud contains, wt. %: PoliKR-K starch polymer reagent 2–2.5, Bioksan gum enzymatic 0.2–0.25, water is balance.
EFFECT: technical result is reduction of degree of hydration (humidification) of rocks of bottom-hole zone of well bore with increase in strength of filtering crust formed on wall of well in medium of used free clay biopolymer drilling mud.
1 cl, 1 tbl, 2 ex
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RU2698389C1 |
