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CONTROL OF COLLIGATIVE PROPERTIES OF DRILLING MUD
CONTROL OF COLLIGATIVE PROPERTIES OF DRILLING MUD
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机译：钻泥胶凝性能的控制
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摘要
Osmotic loss of aqueous phase from a drilling mud is mitigated by adding thereto a material having colligative properties comprising a carbohydrate, such as sucrose or starch, and also optionally containing a salt such as potassium chloride. Preferably, drill bit cuttings from the formation are cleaned of extraneous matter, dried on the surface, compressed to extract aqueous interstitial liquid therefrom, the osmolality of the interstitial fluid determined, and sufficient material comprising a carbohydrate having colligative properties added to the aqueous phase of the drilling mud that aqueous liquid does not substantially pass from the aqueous phase of the drilling mud into the formation.
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