In the drilling fluids service industry the term “inhibition” has come to mean the suppression of hydration of clay, which means inhibit the water to transform the shale into swelled, soft, sticky shale, while her ewe mean the inhibition of swelling pressure. After this knowledge it is acceptable to define inhibition as Reduction of swelling pressure.
The drilling fluid is a major factor in success of the drilling program. There are four mechanical or physical properties to control in the treatment of drilling mud:
- gel strength
Drilling fluids are generally categorized as “water-based” or “oil-based”, and as “weighted” or “unweighted” muds.
Anyone familiar with drill site operations is aware that many active mud systems tend to increase in surface volume. The excess must be disposed of by some means after being hauled away, or jetted out, etc. Examine Figure 1 with the following: