FIELD: oil and gas industry.
SUBSTANCE: invention relates to drilling fluids, water-based and can be used for drilling oil and gas wells, mainly in drilling unstable clay and clastic rocks in salt deposits. Cationic drilling fluid comprises, in weight %: gel powder 3-5; polydadmac 1.05-2.10; starch or dextrin 0.5-3.0; as an additional structurant cationic polymer Rosflok CF 0.5-2; water - the rest.
EFFECT: cationic drilling fluid with improved properties and secures the preservation of stability (integrity) of the borehole walls.
2 tbl, 1 dwg
| Title | Year | Author | Number |
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