HDD Machine common cases and solutions 04

Publication Date: 2020-12-23

Mud seepage: When reaming the hole and dragging the pipe laying, it is common for the mud to seep out of the ground from the hole.

The reason for the mud seepage is that the residual mud debris in the reamed pipe laying hole blocks the drill hole too much, and the mud cannot return from the hole. The mud forms a high pressure in the hole and seeps out from the ground. The second is that the ground is loose, leaving a passage for the mud, and the mud seeps out of the ground along the passage. Under normal circumstances, it does not matter if the mud seeps from the ground. In some specific environments, you must pay special attention. The mud should not seep from residential houses, nor from fish, shrimp, or crab ponds. The measure to prevent mud seepage is to increase the drilling depth. The original design depth of 6 meters can be increased to 9 meters, and the original design depth of 9 meters can be increased to 12 meters. Improve the structure of the drill bit, stir the mud in the drilling hole as much as possible, and increase the viscosity, concentration and flow of the mud appropriately, and increase the mud wall protection, suspension and chip removal capabilities. A complete channel is formed in the borehole, and the mud flows back out of the hole unimpeded.