UFRJ, Petrobras study strength behavior of expandable tubulars

Researchers at COPPE/Federal University of Rio de Janeiro and Petrobras present a method for determining the necessary diameter-to-thickness ratio of tubulars corresponding to required minimum collapse pressures. The article describes the theoretical and experimental studies used to evaluate the behavior of solid expandable tubes.Solid expandable tube technology has many advantages when compared to conventional technology for wells. The expansion of tubes in situ allows development of reserves in many different scenarios found in the oil industry; the technology is compatible with directional and horizontal wells, and facilitates side-track operations.Although the expansion of tubes is at...

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