1. Bobo, R.A.; Barrett, H.M.: Aeration of drilling fluids. World Oil 145(4), 66–73 (1953)
2. Negrao A.F., Lage A.C.V.M., Cunha J.C.: An overview of air/gas/foam drilling in Brazil. SPE Drill. Complet. 14, 109–114 (1999)
3. Saintpere S., Herzhaft B., Abdoulaye T., Jollet S.: Rheological properties of aqueous foams for underbalanced drilling. SPE 56633, 1–13 (1999)
4. Ozbayoglu E., Kuru E., Miska S.: A comparative study of hydraulic models for foam drilling. J. Can. Pet. Technol. 41, 52–61 (2002)
5. Saxena A., Ojha K., Pathak A.K.: Underbalanced drilling and its advancements: an overview. J. Pet. Eng. Technol. 4, 37–51 (2014)