Research on deviated well seperated-layer fracturing technique and its application in Daqing peripheral oilfield

Problems as packer's low pressure bearing,downhole tool slippage,serious abrasion of gush arenaceous packer and safety joint inner wall existed in the conventional deviated well pipe string.According to the research on the study area,the packer tube has been improved,new backwashing packer,gush arenaceous packer and safety joint have been developed.The improved tool show good effect in the actual site application,which provides technical support for increasing the reserve and production of Daqing peripheral oilfield.