What are the common problems when using Horizontal Directional Drilling Machine?

After the reaming and pipe laying, the Horizontal Directional Drilling Machine should be maintained and maintained, and the site should be cleaned up and the landform restored in time. The following editor will share with you the shutdown operation and the exclusion rules for abnormal situations, for your reference during construction .

1. Stop operation

① After the reaming and pipe laying are completed, according to the work arrangement of the person in charge on site, recover the drill pipe and drilling tools, remove the anchoring device, and drive the Horizontal Directional Drilling Machine to the designated location.

② When the drilling is stopped for measurement, the delivery of drilling fluid to the hole should be stopped.

③ According to the equipment maintenance regulations, clean the whole vehicle, first remove the dirt and grease, and then lubricate to keep the equipment clean.

2. Clean up the site and restore the landform

(1) After the operation is completed, the site shall be cleaned up in time, equipment and tools shall be withdrawn, and the landform shall be restored.

(2) When retracting the mast, firstly connect the power head bracket with the mast carriage with a tie rod, raise the tower oil cylinder and drop the tower, slide the mast upwards, and insert the positioning pins connected to both sides of the mast and mast carriage.

(3) After the completion of the project, carry out routine inspection on the drilling tools, mainly including:

① Whether there are cracks in the welding seam of back expansion head;

②Whether the transfer case connecting pin and cotter pin are worn or cracked;

③ Whether the nozzle of the back expansion head is blocked;

④ Whether there is slippery wire or wear on the thread of the drilling tool;

⑤ Whether there is obvious deformation of the back expansion head;

⑥ Check whether the transfer case rotates flexibly.

3. Provisions on exclusion of abnormal conditions

(1) If there is a rock or coarse sand layer during drilling, it should be fed slowly. Once the drill sticks, start the emergency stop device immediately, stop drilling, troubleshoot or choose a drill bit with rock-breaking function to drill again.

(2) When the propulsion or rotation pressure changes suddenly during the drilling process, the probe has no signal, the signal does not change, the signal changes suddenly, the water and gas are not smooth, etc., it should be stopped immediately to analyze and find out the cause.

(3) The jacking or stopping of the pipe should be based on the signal from the tool pipe head. In the event of a failure in the jacking system, a signal should be sent to the operator at the head of the tool pipe to deal with it in time, and work with failure is strictly prohibited.