Abstract: Jing'an Wuliwan of Changqin oilfield is an ultra-low permeability reservoir and Chang 6 oil layer of Triassic is the major oil reservoir,with abundant oil associated-gas. Based on oil reservoir practice,the technical problems and its solutions of single-screw multiphase pump in the applica-tion of associated gas recovery have been analyzed and put forward,which will provide preference and guidance for field development.