Analysis of casing while drilling shows faster drilling,higher production rates

摘要

Applying a risk model to new technology is difficult because there is no experience base for quantifying either the probability of an event occurring or the consequences of the event.This is particularly true when the technology has operational components that go against normal practices such as with Casing While Drilling (CWD).Casing is used as the drillstring to solve problems that one would normally expect to be made worse by drilling with a smaller wellbore clearance,higher annular velocity and little ability to make conditioning trips.