Patent ID: 11859450
Assignee: SHENZHEN UNIVERSITY
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 4:
5. The drilling fluid channel structure of a core drilling rig according to claim 4, wherein the front end of the limit end is connected to the front section of the central rod, a fluid channel F is disposed in the axial direction inside the front section of the central rod, and the limit end is provided with a cooling fluid inlet, the fluid channel E is connected to the fluid channel F through the cooling fluid inlet,
wherein the front end of the central rod front section is sealed and is connected to the integrity-preserving compartment, the front section of the central rod and the integrity-preserving compartment are both disposed in the outer barrel,
the front side wall of the front section of the central rod is provided with a cooling fluid outlet, and a fluid channel G in a layer disposed between an integrity-preserving compartment and an outer barrel, which is connected to the fluid channel F through the cooling fluid outlet, and,
the cooling fluid channel comprises the fluid channel F, the fluid channel G, the cooling fluid inlet, and the cooling fluid outlet, and the front end of the fluid channel G is opened at the drill bit.