Jingan Heavy Industry created a new construction method of "full rotation + gas lift reverse circulation"

In the construction, JAR320H full-rotary drilling rig of Jingan Heavy Industry was first used to drill the 2.8-meter diameter steel casing into the stable rock formation with its strong construction torque. The steel casing played the role of pile foundation positioning, and then the JRD300 gas-lift reverse circulation drilling rig of Jingan Heavy Industry was used to drill further to the design depth. The construction method of "full rotation + gas lift reverse circulation" has fast construction speed, safety and environmental protection, and stable quality of pile foundation.