Variable Tg shape memory polyurethane for wellbore devices

摘要

Wellbore devices for use in filtration, wellbore isolation, production control, lifecycle management and wellbore construction may include at least a first and a second shape-memory material each having a an altered geometric position and each an original geometric position. Each shape- memory material may include a polyurethane material held in the altered geometric run-in position at a temperature below glass transition temperature (T