Common problems and solutions in Horizontal Directional Drilling Machine construction

1. Hole body deflection: In case of hole body deflection caused by using Horizontal Directional Drilling Machine, it is usually possible to hang the drill cone at the deflection point and then scan the hole repeatedly to make the hole straight; when the deflection is serious It is necessary to backfill the cohesive soil to the deflection in time, and drill after the deposit is compacted.

2. Hole expansion and shrinkage: measures should be taken to prevent hole collapse and excessive drill cone swing in case of hole expansion or shrinkage. The former needs to pay attention to timely welding and repairing the drill cone, and the latter needs to adopt the mud retaining wall with a small water loss rate. The shrinkage cavity that has occurred needs to be scanned up and down repeatedly with a drill cone to expand its hole diameter.

3. Paste drilling and buried drilling: Paste drilling and buried drilling often appear in rotary drilling and percussion drilling in positive circulation (including submersible drilling rigs). At this time, it is necessary to check and calculate the consistency of the mud, the import and export of drilling slag, the size of the inner diameter of the drill pipe, and the slag discharge equipment; if the drill is seriously stuck, it is necessary to stop drilling immediately to lift out the drill cone and remove the drilling slag.

4. Drill sticking: It often occurs in the operation of percussion drilling using Horizontal Directional Drilling Machine. After the drill is stuck, the operation that cannot be lifted by force can only be lifted lightly.

5. Drilling objects: When dropping objects, it is advisable to quickly use tools such as hooks or ropes to salvage them. If the dropped objects have been buried by sand, it is necessary to remove the sand and then use the tools to salvage. .

Under no circumstances should the Horizontal Directional Drilling Machine operator enter the borehole without a casing or other protective device to troubleshoot. When drilling holes in the lower casing or other protective facilities, it is necessary to check that there is no harmful gas in the hole and prepare anti-virus, anti-drowning and anti-collapse equipment before taking action.