在采样数据反馈控制中，只要利用一个参数便将系统控制到非稳定平衡点。
The single parameter sampled data feedback control directs the system to unstable equilibrium point with only one parameter.
提出当井壁孔隙压力接近临界值时，井壁处于非稳定平衡状态，在有动力扰动的情况下，井壁因失稳而坍塌。
When the stress of wellbore is close to critical loads, wellbore is in the state of instability, and when dynamic disturbance is present, wellbore will collapse because of in…
提出当井壁孔隙压力接近临界值时，井壁处于非稳定平衡状态，在有动力扰动的情况下，井壁因失稳而坍塌。
When the stress of wellbore is close to critical loads, wellbore is in the state of instability, and when dynamic disturbance is present, wellbore will collapse because of in…
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