Circulating System In Drilling | Components & Application
  The drilling mud circulating system components comprises the following equipment: 

- Active Tank(s) 

- Reserve Tanks 

- Sand Traps and Process Pits 

- Slug and Pill Tanks 

- Trip Tank & Stripping operation Tank 

- SCE (Solids Control Equipment) 

- Mixing System 

Active Tank

  This is the tank from which drilling fluid is pumped downhole and to which drilling fluid returns from the hole are received. The route taken by the drilling fluid when circulating is called the active (
https://bit.ly/3kkuPT7