| 摘要 |
2095605 9207919 PCTABS00013 An additive for a drilling fluid, comprising a composition which is at least dispersible in said drilling fluid at ambient temperatures, and has a solubility in said drilling fluid at drilling temperatures which is lower than the solubility at said ambient temperatures. The composition, when dispersed in water, has a higher affinity than water for the surface of a rock being drilled.
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