This paper describes the main principles of the non-contamination pumping pipe string, that is, use the perforated slip packer and the check valve to separate the cleanout liquid from the formation at certain location...This paper describes the main principles of the non-contamination pumping pipe string, that is, use the perforated slip packer and the check valve to separate the cleanout liquid from the formation at certain location at the lower part of the pump, so as to prevent the well cleanout liquid from killing the well and contaminating the oil reservoir.展开更多
文摘This paper describes the main principles of the non-contamination pumping pipe string, that is, use the perforated slip packer and the check valve to separate the cleanout liquid from the formation at certain location at the lower part of the pump, so as to prevent the well cleanout liquid from killing the well and contaminating the oil reservoir.
