Underbalanced drilling (UBD)

Maximizing productivity of reservoir

The main driver – to invite controlled inflow of formation fluid to surface, creating a pressure drawdown in the well by using specialized equipment.


Reducing the negative effects of mud to the productive reservoir (reduced skin effect in the reservoir section), allows drilling of fractured reservoirs without the need to plug productive zones with LCM, increasing oil and gas recovery and extend the well productivity. This technology also allows you to improve ROP, increase life of bit, reduces the risk of differential sticking, allows production while drilling, if necessary, and reduces ROI time.

slide4
slide5
bnd3-min