TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractSince the spectacular arrival of solid expandable tubulars four years ago, customers have embraced this technology as a revolutionary well construction and production solution. Through innovative technical development and equipment reliability, solid expandable tubulars continue to grow in acceptance and use.Solid expandable tubulars have been used successfully to reach required total depth (TD) with adequate completion size, slim the well construction process, and overcome abnormal pressures encountered down hole while drilling. In addition, this technology has been used to rejuvenate wellbores for well deepening, casing reinforcement for stimulation, as a solution for corrosion problems, and to cover leaks and perforations. As a result, the overall cost of drilling and production operations has been reduced.This expansion process requires the successful integration of the following conditions and equipment:• casing capable of surviving in-situ reforming • friction reduction between the expansion cone and the casing • expandable flush joint connection

In structural health monitoring, the reliability of measured data for use in damage detection is greatly influenced by the sensor characteristics. Specific issues related to design of experiments in structural health monitoring are analyzed including sensor attachment, mass, frequency range, and footprint. A circular plate instrumented with various sensors and attachment methods (adhesive, stud) is used to study the effects of sensor bond on dynamic measurements. Attachment types are shown to have different amounts of measurement variability using an ANalysis Of VAriance technique. Differences in the amount of measurement variability lead to different damage detection thresholds. A validated sandwich metallic honeycomb panel finite element model is also used to conduct a numerical sensitivity analysis. Sensor mass is shown to reduce the sensitivity of damage detection for realistic sensor masses. The sensor footprint is shown to become an issue, by an acceleration field analysis, when the wavelength of the frequency of excitation is on the order of the sensor diameter.