Field
Borehole lubrication and stability during trenchless installation.
Horizontal directional drilling depends on the fluid doing more work than it does in a vertical hole. The mud lubricates the pull, stabilises the bore and carries cuttings along a path where gravity is no help.
Blends are matched to the ground being crossed, since the same product will behave differently through sand, clay and mixed fill.
Mica is supplied alongside as a lost circulation material. The flakes bridge and seal a loss zone, and the grade is matched to the size of the losses rather than taken from a catalogue.
