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为了揭示双卸压槽修复破裂井壁的机理,采用对比方法,通过设置双卸压槽的井壁试件与未设卸压槽的普通井壁试件的模型试验,对此问题进行了研究。研究结果表明:对于设置双卸压槽的井壁,双卸压槽的压缩变形可有效地衰减井壁附加力,确保井壁安全;对于未设卸压槽的井壁,井壁竖向变形很小,极易破坏。
In order to reveal the mechanism of double pressure relief groove to repair broken shaft wall, a comparative method was used to study the problem by setting up the model test of the common shaft wall specimen with double pressure release groove and non-pressure relief groove . The results show that for the wellbore with double pressure release groove, the compressive deformation of the double pressure release groove can effectively attenuate the additional force of the shaft wall to ensure the safety of the shaft wall. For the wall without the pressure relief groove, the vertical deformation of the shaft wall Very small, easily damaged.