Positive circulation rotary joint for reverse circulation drilling machine

• Main Authors: YE YANLI, WANG YANGUANG, WANG HEXIN, GUO SHAOYING, LI SHAOFENG
• Format: Patent
• Language: Chinese; English
• Published: 28.05.2024
• 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 utility model discloses a positive circulation rotary joint for a reverse circulation drilling machine, which comprises an upper shell and a lower shell, a water inlet pipe is arranged on one side of the lower shell, a lower sealing flange is arranged at the bottom end of the lower shell, a lower sealing ring is arranged at the lower part in the lower shell, a middle sealing flange is arranged in the lower shell, an upper sealing ring is arranged in the upper shell, and a lower sealing ring is arranged in the lower shell. A sealing bearing is installed in the upper shell, an upper sealing flange is arranged at the top end of the upper shell, a main shaft is rotationally connected into the upper shell and the lower shell, the upper end and the lower end of the main shaft extend out of the upper shell and the lower shell, and a water inlet is formed in the main shaft. The rotary joint has the beneficial effects that a positive circulation function can be realized on the reverse circulation drilling machine,