FIELD: oil and gas industry.
SUBSTANCE: in well construction method involving drilling of old hole on drilling solution and drilling of productive formation on solution for drilling productive formation, drilling solution with addition of RMD-5 reagent in quantity of 2 to 50 wt % is used as solution for drilling of productive formation. At that, drilling of old hole during drilling process of troublesome zones is performed by using drilling solution with addition of RMD-5 reagent in quantity of 2 to 50 wt %, drilling of old hole at availability of multiple troublesome zones is performed by using drilling solution with addition of RMD-5 reagent in quantity of 2 to 50 wt %.
EFFECT: stabilisation of clay fraction of solution, prevention of colmatation of productive formation, and increase in advancing through a bit and drilling speed.
3 cl, 3 ex
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