FIELD: oil and gas production.
SUBSTANCE: method is described for arrangement of self-destroying filtration crust in underground formation, including introduction of hard polymer, which is able to hydrolyse into organic acid, into drilling mud, and use of drilling mud to drill well bore in underground formation with development of filtration crust; provision of hard polymer hydrolysis in presence of water and violation of filtration crust integrity. Drilling mud is also described for well drilling in underground formation.
EFFECT: creation of self-cleaning filtration crust.
30 cl, 1 tbl, 3 ex
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