Oilfield Technology June 2016
Featured in the June issue of Oilfield Technology, Ulterra discusses how customized bit development for RSS reduces tool failure.
In the past six months, operators drilling in the Wolfbone area of the Delaware Basin have been looking more to rotary steerable systems (RSS) to reduce the time spent drilling lateral wells. RSS have become a more affordable option due to their reduced cost in the down market.
In previous months, the typical wellbore design for a major operator in the Delaware Basin had been a 3 string well utilizing a 13 ½” surface hole, 9 ⅞” intermediate, and 6 ¾” production. With the current down market, the operator like every other operator has been looking for other ways to bring down cost and have better efficiency. One way they sought partially increased performance was by bumping up to a bigger casing profile, yet still utilizing a 3 string well design by drilling a 16” surface, 12 ¼” intermediate, and 8 ½” production hole.