... limit is not reached while drilling and estimate the effect of CwD on curing total losses and bring the casing while drilling performance to the level of conventional drilling. Introduction of CwD required extensive study of the potential torque while drilling as existing stage-cementing tools have low...

... Services. It required changing the "hundred and thirty years of conventional drill-pipe drilling" mindset. This paper describes the decision making process to switch from conventional to casing-drilling, the preparation phase where risks were identified and mitigated, as well as the excellent operational...

... pressure trap so far). The second trial has saved the company over 1MMUSD compared to conventional drilling. In 2012, numerous trials of Vertical Casing while Drilling (VCwD) have been performed for exploration and development wells in offshore North West Java. CwD is heralding the way to the future...

... troublesome well sections that would not have been possible with conventional drilling techniques. The big question is; what happens when we drill with casing instead of conventional drill pipe. In other words, how can we explain the Casing Drilling benefits in regards to wellbore stability? In this study...