The study about a new LW-800 type drilling fluid centrifuge was carried out aimed at the small capacity can't meet the requirement of the solid controlling system to full displacement treatment. The optimization design model of multi-objective for the LW-800 type of drilling fluid centrifuge has been built up and optimization procedure has been designed according to the design requirements base on the basic theory of the decanter centrifuge. This drilling fluid centrifuge's main structure

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... ters also been optimized at the same time. This research may have practical significance in developing new product and improving the existing drilling fluid centrifuge's structure.