1. The single point inclinometer must be carried out after the kelly is drilled and before a single piece is connected. The inclinometer moves the drilling tool every 1-2 minutes during tripping, with a distance of no less than 2m.
2. During drilling, always observe the value of weight indicator and pump pressure gauge. If the hanging weight decreases, immediately find out the cause of the pump pressure drop, and first find out the ground cause. If the ground cause is eliminated and still not restored to normal, immediately trip out for inspection.
