METHOD AND DEVICE FOR PREPARING an oil-based drilling mud.

摘要

In a method for producing oil-based drilling mud, oil, water and emulsifiers are premixed in a first agitator tank 20 and, in a second agitator tank 22 in communication with this, mixed with bentonite and barium sulphate. The mixture in the second tank is stirred by means of disc agitators 30 with a powerful shearing action sufficient to breakdown the bentonite, and is circulated through the two agitator tanks by means of an impeller agitator 32. The second tank may be slightly heated to accelerate the breaking down of the bentonite by a heater accommodated in partition 28. IMAGE