Tag Archives: air rotary drilling

Mist drilling is used if only modest amounts of water inflow are experienced during air drilling. A small amount of water is injected into ...

Dry Air Drilling Overview Dry air drilling is an old underbalanced drilling technique used primarily in environmentally sensitive areas to prevent formation contamination. A basic air drilling surface setup is shown in Figure 1. FIGURE 1 However, effective hole cleaning is a problem with standard air drilling. The drag force on …