FIELD: drilling soil or rock.
SUBSTANCE: invention relates to the field of drilling oil and gas wells, in particular to drilling fluids, and may find its application in the drilling of unstable clay rocks. Polymer clay drilling mud contains, wt%: bentonite clay 5; polyvinylpyrrolidone PVP 6.3–10; sodium formate 5.3–9.2; liquid potassium glass 3; antifoam 0.1; the rest being water.
EFFECT: high inhibiting properties and low values of mud filtration rate.
1 cl, 2 tbl
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Authors
Dates
2018-12-21—Published
2018-05-31—Filed