Pipe-collapse issues provide economic opportunities

To overcome design issues that affect well economics and operations, historical methods of casing design require revisions.Engineers base most of their casing design approaches on a set of assumed extreme field loads and minimum pipe performance properties. This approach, however, has resulted in a significant amount of over design.Ironically, most failures and problems occur near the pipe connection, which requires greater attention in terms of load-integrity analysis, selection, manufacturing quality control, or field running assurance.There are also a number of potential failure modes, such as buckling, connection back-outs, and wear issues that are improperly addressed by conventional...

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