Oil gas collecting device and tubular column thereof

The utility model discloses an oil gas collecting device and a tubular column thereof. The tubular column comprises an outer sleeve, a separation tube and a liquid carrying tube which are arranged from outside to inside; a liquid-gas separation cavity communicated to the position below the underground liquid level is formed between the outer sleeve and the separation pipe, a communication cavity is formed between the separation pipe and the liquid carrying pipe, and a liquid carrying cavity is formed in the liquid carrying pipe. A liquid inlet section is formed at the lower end part of the separation pipe and forms a liquid inlet channel which is communicated (directly communicated or indirectly communicated) with an underground liquid level; a lower opening of the liquid carrying cavity is opposite to the liquid inlet channel, and the liquid carrying pipe is provided with an air passing hole communicated with the communicating cavity and the liquid carrying cavity. In the well opening or closing process, gas