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专利概况
专利名称 VARIABLE TG SHAPE MEMORY POLYURETHANE FOR WELLBORE DEVICES
申请号 CA2794459 申请日
公开(公告)号 CA2794459C 公开(公告)日
申请(专利权)人 BAKER HUGHES INCORPORATED 发明人 CARREJO NICHOLAS; JOHNSON MICHAEL H
专利来源 国家知识产权局 转化方式
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 (Tg), where the Tgs and/or the respective slope changes of the first and second polyurethane materials are different. Once the wellbore device is in place downhole and the first and second shape-memory materials are subjected to temperatures above their Tgs, the materials will deploy and expand to recovered geometric positions at or near their original geometric positions to perform their filtration, isolation, control or other function. These deployments or expansions may occur at different times or rates.

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