Ⅲ· The Role of Mud Tank in Solid Control System
As mentioned that one mud agitator is equiped on the top of each compartment, and the mud would be stirred by the agitator impeller which is welded with four 45-degree blads at the bottom end of the impeller. Driving by the agitator, the impeller can stirring the mud sufficiently. The diameter of the impeller includes many sizes. While the length of the impeller shaft depends on the depth of the mud tank.
On the top of mud tank, there also exists a floating mark, the bottom of which is floated on the surface of the mud in the mud tank. By reading the mark, drilling workers can easily know the depth of the mud down in the tank, and no need to enter into the tank. While for the purpose of mud tank cleaning, and inner pipeline maintaining, there also exists a ladder in each compartment, and also a cover on the top to avoid any falling accident.
Ⅳ· How the Mud Tank Works.
The mud tank bears the whole circulation process of the drilling fluids between the wellhead and mud pump. First it comes directly to the shale shaker. The solids are to be separated by the shaker screen and discharged out of the mud tank through the sand-releasing slot, while the drilling fluid with small particles would enter down to the compartment below the shaker for further separation. If air infusion into the mud, a sand pump would suck up the mud from previous compartment and pump it into the vacuum degasser to discharge the air in the mud and return the drilling mud into the second compartment. If non air infusion, the vacuum degasser would work as mud agitator.
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