Underground nitrogen foam generator assembly and foam generator

The utility model discloses an underground nitrogen foam generator assembly and a foam generator using the same. The problems that an existing foam generator is serious in foam defoaming and intolerant to the underground strong corrosion environment are mainly solved. The underground nitrogen foam generator is characterized in that the underground nitrogen foam generator comprises a throwing and fishing foaming core body and a fixed working barrel; the casting and fishing foaming core body comprises a casting and fishing structure, an anti-channeling structure and a secondary foam generating structure; the dropping-fishing structure comprises a dropping-fishing joint, a pull rod, a gland, a pull rod spring and a connecting pipe; the anti-reversing structure comprises a torsional spring, a cam and a small shaft; and the secondary foam generating structure comprises a Venturi tube and a reversing spiral block. According to the underground nitrogen foam generator, stable foaming in an underground oil pipe can be