| 摘要 |
A drill fluid contains bentonite clay, humates, polymeric fluid-loss reducer, chlorides of alkali metals, bituminic component, hydrocarbons and water. In addition it contains filler of organic or inorganic origin, hydrated lime as regulator of drill fluid alkalinity, phosphatide or products based thereon as lubricating additive. It contains coal-alkali reagent or humate-potassic reagent, or polydrill, or polygum etc. as humates. |
