| 摘要 |
The invention features the use of a shape memory material in a downhole a pplication 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-compress ed below the transition temperature when the material has low modulus of ela sticity. 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 temperat ure to store a force. The tool is then independently released to allow the s tored force to set the tool.
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