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Three types of shale shaker used in drilling fluid circulation system

Linear motion shale shakers represent the newest shaker technology and are the most common approach to solids control in the oil and gas drilling industries. They produce linear motion via a pair of eccentric shafts rotating in opposite directions. Linear motion shale shaker provides superior cuttings conveyance and is able to operate at an uphill slope to provide improved liquid retention.

shale shaker

Balanced elliptical motion shale shakers are especially effective while drilling top-hole sections where heavy, high-volume solids are present. On a balanced elliptical shale shaker, the difference in power between the two vibrating motors results an unbalanced force. With this setup, elliptical motion shakers can effectively remove solids and eliminate larger particles in drilling fluids. The relatively moderate vibration strength of balanced elliptical shale shakers can reduce the screen consumption.

shakers

Circular motion shakers have a single vibrator shaft located at the center of mass of the shaker tray. A motor drives a concentric shaft fitted with counterweights, providing pure circular motion along the length of the vibrating tray. This feature improves solids movement off the deck compared with unbalanced elliptical designs. The circular motion transports solids along the screen reducing the loss of drilling fluid. Circular motion shale shakers are often operated as stacked units with the coarsest screens on the top deck becoming finer on the lower decks.

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