prior art sieve shaker

In certain prior art sieve shakers having one (or more) processing screens

, such screens cannot adequately deal with a surge in fluid flow or high fluid flow rates, e.g. During a "bottoms up" or riser pipe circulation condition. La other prior art systems, the discharge of one or more sieve shakers is fed to another sieve shaker for further de-liquefying and de-oiling. Such a process necessarily requires at least two sieve shakers. However, on offshore drilling rigs, space is at a premium. For this reason, tiered or tandem sieve shakers are used to effect a finer screening of the mud on the second level. But, in high volume operations, such tandem sieve shakers may not be able to handle the throughput due to their limited size.

Accordingly, there is a need to enhance the capacity of a tandem sieve shaker during high mud volume operations without increasing their "foot print", i.e., the area of floor space required by the base of the tandem sieve shaker.

prior art sieve shaker

By: eric

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