Reduce well costs and construction time
When operating in the Chinarevskoe field, Zhaikmunai LLP has
traditionally used conventional-motor BHAs. Initially, A962M motors were used
to drill the 11 5/8-in sections at an ROP of 14 m/h. However, due to the
inability to fish the A962M motors, they were replaced with A825M motors, which
lowered average ROP to 10 m/h. Drilling parameters were altered to maintain
verticality with packed BHAs, which lowered ROP and increased overall well
Develop a step-change, integrated solution
Schlumberger and Smith Bits, a Schlumberger company, worked together to
develop an integrated drilling solution for Zhaikmunai that included PowerV RSS
and a customized Smith PDC bit with ONYX cutter technology.
When drilling, the PowerV RSS actively steers downward, regardless of
the azimuth of any inclination present. Using a closed loop inclination mode,
the vertical RSS senses if the hole inclination is building and automatically
determines the direction required to steer back to vertical. Once vertical, any
deviation tendency is corrected automatically downhole, thereby maintaining
without any operator interaction from surface.
The customized bit design included ONYX PDC cutters, which demonstrate
greater wear resistance and fatigue life compared with conventional PDC
cutters. ONYX cutters are field proven to stay sharper longer, meaning more
footage at maximum ROP and reduced cost.