| 摘要 |
FIELD: mining industry, particularly well drilling with direct or reverse circulation of mud, as well as well repair. ^ SUBSTANCE: rig comprises double pipe string with annular cavity defined in-between and jet device provided with check valve. The injection device is formed as body connected with inner pipe string. The body is provided with radial channels and annular nozzle set having receiving channels. The receiving channels are aligned with the radial channels to supply compressed air through annular nozzles in annular space at an angle to jet device axis. ^ EFFECT: increased pulp lifting capacity due to improved efficiency of pulp mixing with compressed air. ^ 4 cl, 1 dwg |
