Drilling With Casing | How, Why & Cementing Tips
Drilling with Any of the casing types & casing liners is not new. It was routine practice in some shallow fields between 50 and 60 years ago to attach a drilling bit to a small-diameter production string, drill a few hundred feet, and leave it on bottom once total depth was reached. Outside that limited sphere, it generally was recognized that, if casing could be used as a drill string without making tripping pipe, there would be some obvious advantages over conventional drilling.
https://www.drillingmanual.com/drilling-with-while-casing/