The filtrate loss controller for drilling fluid is prepared by one step method using alkaline paper making black liquor as main raw material.
以碱法造纸黑液为主要原料，经过一步合成工艺制备钻井泥浆降滤失剂。
The filtration mechanism of PVA17-88 crosslinked is that the formation of a fine film between filtrate medium and cake can prevent loss of water in slurry into formation.
加入交联剂的PVA17 - 88降失水剂的降滤失机理是：在过滤介质与滤饼之间形成一层致密的薄膜，阻止了水泥浆中的水向地层流失。
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