New mud for UnderBalanced Drilling.
Sławomir Wysocki, Magdalena Gaczoł, Marta Wysocka
Vol. 33, no. 4 (2016), s. 801-808, 
This paper describes a research finding of drilling mud designed for UnderBalanced Drilling. The UnderDril mud formula is based on a low number of compatible components, therefore it enables uncomplicated adjustment of its technological parameters to specific conditions and contributes to the reduction of its application costs. Moreover, the UnderDril mud is composed of biodegradable ingredients, that results in a beneficial effect on the possibility of its utilization and simultaneously makes it hazardous free for the environment.The conducted research showed that the abovementioned mud can find an industrial application.