THE DIFFERANCE BETWEEN WEIGHTED AND UNWEIGHTED MUDS

Water as a drilling fluid does not qualify as a mud. If there are no hole (formation) problems that prevent its being the most economical drilling fluid; if neither the geologist, palentologist, nor production supervisor have valid objections; and if it is available, water is seldom if ever surpassed. When the formation requires, or a supervisor demands , filtrate control and / or viscosity and /or gels in the drilling fluid, a “mud” is built. Or if the fluid density required is too high for salt water alone , mud properties are required to suspend barites.

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Improved Solids-Control–Closed-Loop Systems

The overall efficiency of cuttings removal by the solids-control system, Es, can be expressed as:

Es = E1 f 1 +( 1 – E1 )E2 f 2 + ( 1 – E2 )E3 f 3 +( 1 – E3 )E4 f 4    (1)

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HYDROCYCLONE USE IN DRILLING

Hydrocyclones are very effective classification devices which, as a result of centrifugal forces in the spinning fluid, cause solids to be separated at the underflow. Hydrocyclone is core part of mud cleaner, desander and desilter.

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