Reason analysis and experimental study on the sliding of sump packer after cable setting
Located at the bottom of the sand control string in the cased well,the sump packer plays a role in positioning the sand control string and sealing the artificial bottom of the well.Meanwhile,it can withstand part of the axial force generated by the self-weight of the sand control string.There are two types of set-ting,hydraulic setting and cable setting.In completion operations,cable setting can prevent the sump pack-er from being lowered into the well by the drill pipe,greatly improving the efficiency.However,in a ther-mal recovery well in Bohai Oilfield,the sump packer experienced a decline after setting.In response to this phenomenon,the root cause analysis method was used to analyze the reasons for the sliding of the sump packer,and indoor experiments were conducted to verify the results.The results show that the sliding of the sump packer is caused by the small bite force between the slip and casing.During the cable setting process,the longer the effective setting time is within the time range when the gunpowder is burned out,the greater the setting force,the less likely the sand packer is to slide down,and the wall thickness of the slip groove is not the main factor affecting the sliding of the sump packer.
sump packercable settingslip bite forcesetting timesetting force
万方数据
维普
