STUDY AND APPLICATION OF WELL-COMPLETION PIPE-STRING FOR PREVENTING FORMATION DAMAGE IN LOW-PERMEABILITY OIL RESERVOIR

The well completion pipe-string for formation damage preventing in lowpermeability pools was introduced including well-completion controlling pipe-string, blowout prevention pipe-string and main tools. The formation damage in wax removal, well-flushing and well-killing job were solved by the technique. It has a important role for formation protection in development of low-permeability oilfield.