Paper: Pre-Formed Stable Foam The New Approach to Big Hole Drilling and Slim-Hole High-Pressure Cleanouts

Stable foam has been used to drill large diameter near-gauge holes at increased penetration rates in low and high temperature formations and in top hole drilling in West Texas. The use of stable foam in conjunction with hydraulic snubbing units and reeled pipe units has been successfully used for a variety of well servicing operations under substantial wellhead pressure. Jobs are completed at less cost than those where killing fluids are used; and formation damage is minimized or eliminated.