Air reverse circulation double-helix plugging device

• Main Authors: RAN LINGJIE, TAN CHUNLIANG, QU HONGJIE, LU MENG, SU XINGTAO, FENG YUEWEN, ZHU QIANG, SONG DIANLAN, YUE YONGDONG, LU QIAN, LIN GUANGLI
• Format: Patent
• Language: Chinese; English
• Published: 08.09.2023
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The invention provides an air reverse circulation double-spiral plugging device which comprises a lower plugging connector, an inner pipe female connector and a lower spiral plugging connector, the lower spiral plugging connector is connected with a double-wall drill rod by designing a male buckle, and an inner pipe of the double-wall drill rod is inserted into the inner pipe female connector; the lower plugging connector and the inner pipe female connector are fixed through a lower plugging inner pipe fixing screw, an upper plugging connector is further arranged at one end of the inner pipe female connector, the double-wall drill rod is further connected with an upper spiral plugging connector by designing a female buckle, an inner pipe male connector is further inserted into an inner pipe of the double-wall drill rod, and the inner pipe male connector is connected with an upper spiral plugging connector. The inner pipe male connector and the upper plugging connector are fixed through an upper plugging inner