FIELD: water-based drilling fluids.
SUBSTANCE: invention can be used for drilling clay and salt rocks, as well as in the opening of productive formations. The drilling fluid includes, in % by weight: clay powder 3-5; a copolymer of polydadmach with acrylamide copPA, in which the weight ratio of polydadmach and acrylamide is: polydadmach 95-97% and acrylamide 3-5%, 7-15; the rest is water.
EFFECT: increase of the inhibitory and fixing ability in relation to clay rocks.
1 cl, 3 tbl
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Authors
Dates
2023-03-28—Published
2022-03-28—Filed