Oil recovery well sampling device

The utility model discloses an oil recovery well sampling device, including the sampling pipe, the inner chamber sliding connection of sampling pipe has a piston, the top fixedly connected with push rod of piston, and outside the one end of push rod extended to the sampling pipe, there was the sampling needle bottom of sampling pipe through thread bush threaded connection, and the inner chamber sliding connection of sampling needle has the lug, sets up first logical groove on the lug, and fixed mounting has the vesica body in the lug. The utility model discloses a set up the lug, first logical groove, the vesica body, a spring, fixed block and second lead to the groove, take crude oil through the sampling needle, crude oil and high -pressure oil -gas at first get into in the lug in the sampling needle, the pressure that the high -pressure oil -gas inflation produced makes lug extrusion spring, thereby dissolve pressure, and through the body of the vesica in lug absorbing gas, prevent gaseous effects analysis'