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Operating Steps and Precautions for Drill Pipe of Rotary Drilling Rig
Release time:
2018-05-28
Author:
Source:
The drill pipe and drill bit of the rotary drilling rig can only be used for the drilling of pile holes, and are not allowed to be used for soil handling, handling or leveling of the construction site. Never immerse the drill in liquid concrete. And only when the drill bit contacts the bottom of the hole to start the drilling operation.
The drill pipe and drill bit of the rotary drilling rig can only be used for the drilling of pile holes, and are not allowed to be used for soil handling, handling or leveling of the construction site. Never immerse the drill in liquid concrete. And only when the drill bit contacts the bottom of the hole to start the drilling operation.
When drilling into sand layer or pebble layer, the driver should pay special attention to it. When drilling, the footage should not be too deep at one time. Otherwise, the hole wall will shrink, so that there will be no gap between the barrel wall of the drill bit and the hole wall, which will cause the drill bit to fail to reverse or lift, causing major accidents such as sticking.
According to the geological environment, to select the appropriate drilling bucket. The selection of drilling bucket suitable for geological requirements not only improves the work efficiency, but also avoids the occurrence of major accidents of buried drilling and sticking drilling.
When using the drill pipe of the rotary drilling rig, please note that when the drill pipe of the rotary drilling rig is raised from the pile hole, you should pay attention to observe the raising of the drill pipe of the outer section of the rotary drilling rig. If the drill pipe of the external rotary drilling rig is pulled out from the power head too early, it means that the drill pipe of a certain rotary drilling rig cannot be completely unlocked when it is retracted. In this case, you must follow these steps:
1. Immediately stop the lifting action of the main hoist to prevent the drill pipe of the rotary drilling rig from opening itself during the lifting process. The drill pipe of the rotary drilling rig that is not unlocked may slide down freely and cause the rod to fall. The loss of falling rod is very serious, and it is possible to scrap the whole rotary drilling rig drill rod and pile hole.
2. Slowly drop the drill pipe of the rotary drilling rig into the bottom of the borehole again, reverse the drill pipe of the rotary drilling rig, and then put forward the drill pipe of the rotary drilling rig after it is determined to be unlocked.
3. Remove the drill pipe of rotary drilling rig for inspection after soil pouring.
4. OpenDrill pipe of rotary drilling rig, complete review and correction of the drill pipe.
The operator is hereby reminded that the footage should not be too deep at one time during drilling, otherwise the hole wall will shrink, so that there will be no gap between the drill barrel wall and the hole wall, resulting in the drill bit unable to rotate or raise positively, resulting in major accidents such as drill sticking.
Key words:
Beneficial Mining Technology
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