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预应力固井
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预应力固井
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固井
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pre-stress cementing
预应力固井
在固井时,在套管串下部连接预应力地锚,给套管施加一定强度的拉应力,使套管在一定拉伸状态下被水泥凝结,当温度升高时,就可抵消一部分套管受热产生的压应力,从而提高套管的耐温极限,减缓或避免注蒸汽造成的套管破坏的固井方法。
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