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mud balance
A mud balance, also known as a mud scale is a device used to measure the density (weight) of drilling fluid, cement or any type of liquid or slurry.
==Description and operation==
It consists of a graduated beam with a bubble level and a weight slider along its length and a cup with a lid on one end. The cup is used to hold a fixed amount of fluid so it can be weighed. A slider-weight can be moved along the beam, and a bubble indicates when the beam is level. Density is read at the point where the slider-weight sits on the beam at level.
Calibration is done using a liquid of known density (often water) by adjusting the counter weight. Typical balances are not pressurized, but a pressurized mud balance operates in the same manner.〔(Schlumberger's oil field glossary )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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