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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 fresh water) by adjusting the counter weight. Typical balances are not pressurized, but a pressurized mud balance operates in the same manner.

Reason for use

There is no reliable visual method of determining the density of drilling mud; the mud balance is the most reliable and simple way of making the determination.

References

References

  1. Chilingar, George V.. (1983). "Drilling and drilling fluids". [[Elsevier]].
  2. Henn, Raymond W.. (2003). "AUA guidelines for backfilling and contact grouting of tunnels and shafts". [[ASCE Publications]].
  3. [http://www.glossary.oilfield.slb.com/en/Terms/m/mud_balance.aspx Schlumberger's oil field glossary]
  4. [http://www.deanbennett.com/drilling-mud-testing-equipment.htm Dean Bennett testing equipment]
Info: Wikipedia Source

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