Underreaming technologies provide array of applications

Underreaming, a complex market consisting of at least 22 drilling applications, offers several product options, including bicenter bits, reaming wing tools, expandable bits, and underreamers. Click here to enlarge imageUnfortunately, in terms of product selection and application, the variety of available options presents a quandary to the drilling professional (Fig. 1). The information in this article, which is drawn from 52 interviews with employees from 18 operators, six drilling contractors, and four service companies, sheds light on this topic.Study methodology Click here to enlarge imageThe accompanying box provides a list of strengths and limitations for retractable drill bits, bi...

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