Abstract
In this work, the physical modified of native cassava (yuca) starch (Manihot esculenta crantz) was studied as API fluid loss control additive. Physical pregelatinization of native yuca starch can be carried out without the need to use water or heat; they were used only with pressure cutting at cryogenic temperatures and environment. Pregelatinized native yuca starch samples obtained from these two processes, show physical and rheological properties similar to chemically pregelatinized potato starch sample. However, physical pregelatinized yuca starch sample obtained by convectional milling at room temperature was the one provided the best API fluid loss control with 2.5 mL ± 0.1 mL in water-based drilling fluids (WBDF).
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