Invention Grant
- Patent Title: Variable Tg shape memory polyurethane for wellbore devices
- Patent Title (中): 可变Tg形状记忆聚氨酯用于井筒装置
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Application No.: US12732617Application Date: 2010-03-26
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Publication No.: US08365833B2Publication Date: 2013-02-05
- Inventor: Nicholas Carrejo , Michael H. Johnson
- Applicant: Nicholas Carrejo , Michael H. Johnson
- Applicant Address: US TX Houston
- Assignee: Baker Hughes Incorporated
- Current Assignee: Baker Hughes Incorporated
- Current Assignee Address: US TX Houston
- Agency: Mossman Kumar & Tyler PC
- Main IPC: E21B23/00
- IPC: E21B23/00

Abstract:
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.
Public/Granted literature
- US20110232901A1 VARIABLE Tg SHAPE MEMORY POLYURETHANE FOR WELLBORE DEVICES Public/Granted day:2011-09-29
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