Type: Used

Location: Elk City, OK

Condition: Very Good

Used 3272# Sand Trap Description

A small pit, typically located immediately after the shaker screens, which is used as a settling pit to separate coarser solids that accidentally bypass the shakers. Mud enters the pit at one side and exits via an overflow at the other. Sand traps are dumped periodically to remove the settled solids, or alternatively the contents can be processed over a fine screen or with a centrifuge. A sand trap is the settling compartment located downstream of the shale shakers. It should be the only settling compartment and preferably should not be used in closed-loop systems. Its main function is to remove large solids that might plug the downstream hydro cyclones. With the fine screen capabilities of today’s shale shakers, the sand trap mainly serves as a back-up should the shakers be bypassed or operated with torn screens. The sand trap should be the first compartment the mud enters after passing through the shaker screens. Since it is a settling tank, it should not be stirred and the mud should exit the sand trap over a high weir. The sand trap floor should have a 45 ̊ slope to its outlet. A 20 to 30 bbl volume is sufficient. A quick opening solids dump valve that can be closed against the mud flow is recommended to reduce mud losses. The sand trap should be dumped only when nearly filled with solids, since whole mud is lost when the sand trap is dumped (not oil based muds).

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