Downhole tool operated by shape memory material springs

Details Downhole tool operated by shape memory material springs Downhole tool operated by shape memory material springs

E - Fixed Constructions

21

B

E21B 23/00 (2006.01) E21B 43/10 (2006.01) F03G 7/06 (2006.01)

Patent

CA 2669776

The invention features the use of a shape memory material in a downhole application to provide an energy source for at least in part setting the tool (10). In a specific application the springs (34) that set slips (12) for a liner hanger are made from the shape memory material and easily pre-compressed below the transition temperature when the material has low modulus of elasticity. The tool (10) is run into position where a heat source such as well fluids or a heater can bring the springs (34) above the transition temperature to store a force. The tool is then independently released to allow the stored force to set the tool.

L'invention a trait à l'utilisation d'un matériau à mémoire de forme dans une application d'extraction pour fournir une source d'énergie pour au moins en partie régler le matériel (10). Dans une application spécifique, les ressorts (34) qui définissent des glissements (12) pour un dispositif de suspension de manchon sont réalisés à partir du matériau à mémoire de forme et facilement compressés au préalable sous la température de transition lorsque le matériau a un faible module d'élasticité. Le matériel (10) fonctionne dans une position dans laquelle une source de chaleur telle que les fluides d'un puits ou un réchauffeur peut amener les ressorts (34) au-dessus de la température de transition pour emmagasiner une force. Le matériel est alors libéré indépendamment pour permettre à la force emmagasinée de régler le matériel.

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