Gas-tight sampling barrel for oil well

A gas-tight sampling barrel for an oil well comprises an upper lid (1), a gas outlet (2), a grid mesh (3), a sampling port (4), separation umbrellas (5), supports (6), a barrel body (7) and a lifting handle (8), and integrally adopts a cylindrical tube structure, wherein the lifting handle (8) is arranged at the upper end of the barrel body (7), and the upper lid (1) is arranged at the top of the barrel body; the gas outlet (2) is formed at the eccentric part of the upper lid (1); the grid mesh (3) is arranged in the gas outlet (2); the sampling port (4) is formed in the center of the upper lid (1); three stages of the separation umbrellas (5) are arranged below the sampling port (4); the sampling port (4) penetrates the centers of the upper two stages of the separation umbrellas (5) for fixed coupling and exactly faces the top of the third-stage separation umbrella (5); and the three stages of separation umbrellas (5) are connected through the three supports (6). The gas-tight sampling barrel for the oil wel