Components: The big hook consists of the hook body, hook shank, hook base, lifting ring, thrust bearing, and spring. (For detailed usage, refer to the big hook manual.)

Drilling Work Requirements for the Big Hook:

1. It should have sufficient strength and reliable working performance.

2. The hook body should rotate flexibly for easy make-up and break-out.

3. The spring travel of the big hook should be enough to compensate for the distance during make-up and break-out of drill rods.

4. The locking mechanism for the hook mouth and side hooks should be absolutely reliable, easy to operate, and convenient for opening and closing.

5. The big hook should have a damping function to reduce the impact during the disassembly of the drill string.