| 摘要 |
FIELD: well-boring. SUBSTANCE: drilling mud for horizontal boreholes containing water, mudding agent (0.4-0.6%), and special-type polymer (0.4-0.6) is distinguished by having, as mudding agent, broken marble and including additionally 6-8% of urea. EFFECT: increased retention capacity at low filtration, and reduced number of components. 1 tbl
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