| 摘要 |
FIELD: oil and gas production. ^ SUBSTANCE: weighted drilling fluid for exposing zones with abnormally high formation pressures contains, wt %: clay 1-2, barite 10-60, sodium formate as stabilizing reagent 10-30, and carboxymethylated starch as rheological and filtration property regulator 1-5. ^ EFFECT: improved flocculation property of fluid, increased drilling speed, increased heat resistance of fluid, and decreased corrosion effect. ^ 1 tbl |
