| 摘要 |
<p>A method and apparatus for forming an elastic memory foam into an expansion element (30) with an outer diameter OD1 larger than a borehole BHD, heating the expansion element (20) to its transition temperature and compressing it to a smaller run-in diameter OD2, cooling the compressed expansion element below its transition temperature and running it into the borehole, then raising the expansion element to its transition temperature to cause it to expand and seal against the borehole wall. Expansion can be enhanced by expanding a mandrel (30) on which the expansion element is formed.</p> |
