| 摘要 |
The siliceous drilling fluid contains sodium silicate, alkali metal salts, starch, biopolymer and carboxymethyl cellulose. It is characterised in that it consists of: 3-26 percent of potassium or sodium chloride, 0.1-2 percent potassium or sodium hydroxide, 4-10 percent of bentonite, 0.3-0.5 percent of polyanion carboxymethyl cellulose with low and/or high viscosity, 0.6-1.5 percent of carboxymethyl starch, 0.1-0.2 percent of biopolymer, 5-10 percent of sodium silicate and 0.1-3 percent of hydrated sodium triphosphate. |
