Development and service of drilling fluid

DTEK Neftegaz continues a program to restore and deepen old wells. At this well, it is planned to drill a sidetrack from a depth of 5400 m. The design depth of the well is 5770 m.
Witer II invert emulsion drilling mud of various densities will be used during drilling:
withing an interval 5400-5670 m – 1200-1300 kg/m3,
withing an interval 5670-5770 m – 1000 kg/m3.
The wellbore within the interval of productive zone will be cased by an operating filter liner.