【摘要】 为较好地模拟固井水泥环损伤的井下实际工况,评价固井水泥环的力学性能和完整性,研制出了一种新型固井水泥环完整性模拟评价实验仪。将固井水泥样品放置在特制的钢管中,在规定条件下养护成型后,放入由压紧圆盘和旋紧压环等主要部件组成的模拟实验仪中,通过施加机械挤压力模拟固井水泥环受压破裂的实际工况,同时施加水力压力模拟地层流体压力,测试固井水泥浆固化体在复合压力作用下的抗窜强度,从而客观地分析样品的抗裂性能、胶结强度和弹韧性,获得比三轴应力仪和万能实验机更直观的实验数据。固井水泥环完整性模拟评价实验仪为固井水泥环力学性能和完整性评价实验提供了一个新的实验手段。更多还原

【Abstract】 A new type of cement sheath integrity simulation evaluation instrument was developed for the purpose of simulation of cement sheath’s actual working conditions.In simulation experiment pouring shaping cement was put in simulation instrument which undergo mechanical extrusion and hydraulic pressure.Anti channeling strength data of cement slurry was obtained in this condition.Conclusions on crack resistance,bonding strength and toughness is more objective than from other instruments.更多还原