Design optimized drilling system to produce wellbore quality
Schlumberger recommended anchoring a TrackMaster CH cased hole whipstock
system in the 13 3/8-in casing, milling an exit, and drilling a rathole. To
kickoff from the whipstock and directionally drill the section, an integrated
BHA was configured that combined PowerDrive Xceed RSS, Rhino XS hydraulically
expandable reamer, and a 12 1/4-in PDC bit from Smith Bits, a Schlumberger
company.
To optimize the BHA for this application, i-DRILL engineered drilling
system design was used to predict formation-generated impediments to drilling
performance, such as vibration and bit cutting action instability.
Deliver stability and durability in record run
The TrackMaster CH cased hole whipstock system milled the 13 3/8-in
casing exit and drilled a 7-m rathole in one trip. The integrated BHA
directionally drilled the 2,719-m section while enlarging it from 12 1/4 in to
13 1/2 in. Providing stability and durability in the challenging formation, the
integrated drilling system built a high-quality wellbore with an inclination
angle of 28.1° to 80.6°, setting a record for the longest RSS run in
Malaysia.
