Mitigation of localized stress in tubulars

Details Mitigation of localized stress in tubulars Mitigation of localized stress in tubulars

F - Mech Eng,Light,Heat,Weapons

16

L

F16L 9/18 (2006.01) E21B 17/01 (2006.01) F16L 9/14 (2006.01)

Patent

CA 2614789

A technique distributes localized stress acting on a tubular. The tubular is formed with an inner layer and an outer layer that is compliant relative to the inner layer. A force distribution material is disposed between the inner layer and the outer layer to spread any concentrated loads acting against the tubular. The compliant nature of the outer layer causes it to distort against the force distribution material when acted on by a concentrated external load. The outer compliant layer and the force distribution material cooperate to isolate and protect the inner layer from displacements of the surrounding subterranean material.

Une technique permet de répartir les contraintes localisées sur du matériel tubulaire. L'élément tubulaire est constitué d'une couche intérieure et d'une couche extérieure conforme à la couche intérieure. Une matière de répartition des forces est placée entre la couche intérieure et la couche extérieure pour étaler toute charge concentrée agissant contre l'élément tubulaire. La nature conforme de la couche extérieure la fait se déformer contre la matière de répartition des forces, lorsque cette couche est soumise à une charge extérieure concentrée. La couche conforme extérieure et la matière de répartition des forces coopèrent pour isoler et protéger la couche intérieure contre les déplacements du matériau souterrain environnant.

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