TECHNOLOGY Method reduces errors in oil-based mud hydraulic calculations

Haiwang Sun Maurer Engineering Inc. Houston To significantly reduce errors, a practical method has been developed for including temperature and pressure in oil-based mud hydraulic calculations. Density and rheological properties of oil-based muds are more affected by temperature and pressure than in other muds. Because current API recommended drilling hydraulics calculation techniques do not include these parameters, the API calculations are not accurate. Although literature does mention this problem, no systematic solution has previously been available. Matching pump pressure Oil-based muds, by eliminating downhole problems and increasing penetration rate, ar...

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