| 摘要 |
<p>A preform comprises, distributed along its wall, annular curable zones (3) which are radially and outwardly deformable so that they apply against the wall (20) of the well (2), or of the conduit, and which form, after curing, anchoring and sealing locks for the casing. Application: casing of wells, particularly oil wells, or conduits, without using cement.</p> |
