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The fluid is expected to have a sufficient viscosity

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Unformatted text preview: c) 2005 by Ali Ghalambor & Boyun Guo 58 Viscosity: The viscosity of a drill fluid has many effects on the drilling process. The fluid is expected to have a sufficient viscosity to carry the cuttings from the hole yet have a minimum necessary viscosity to minimize swab and surge pressures due to vertical pipe movement. The viscosity dependent on: (1) the size , shape, and number of particles in the system; (2) the internal attraction of the mud particles. 117 Fluid Loss: One of the primary functions of a drilling fluid is that of controlling the amount of fluid lost from the mud to the formation. Salinity: The salinity of the mud system is dependent upon the number of salt ions in solutions. The salinity may be a measure of the chloride ions or a measure of total salt. Gas Counting: Measuring the amount of gas in the mud system is used in abnormal pressure detection. 118 Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 59 Special Operations Volumetric Method: the volumetric method is one way to run the pipe in the hole in a controlled m...
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