The utility model relates to a collection system, its structure is provided with axle sleeve and swivel nut according to upper and lower position in the raceway, the axial lead of axle sleeve with the axial lead of swivel nut all is located on the axial lead of said raceway, the outer wall of said raceway middle part rigid coupling have with the endocentric circular positioning disk of raceway, the positioning disk bottom surface the columniform resilient seal body has been cup jointed on the raceway, the diameter of the resilient seal body is greater than the diameter of said positioning disk nevertheless is less than pressurized-water well well head bore of pipe, resilient seal body bottom cup jointed the bottom plate on the said raceway, the bottom surface of said bottom plate has connect the support, perforate in the center that is equipped with on the said support, the cross-under has the screw rod in perforating in the center, the screw rod upwards penetrates in the said raceway, and with said swivel nut threaded connection, with said axle sleeve slip cross-under is followed again wear out in the last port of raceway. The utility model discloses can realize with the quick installation and the location of pressurized-water well well casing, improved the convenience of sampling operation