Three major interaction mechanisms revealed through laboratory tests:rig pengeboran sumur air
-
Hydraulic coupling effect:
Mud pressure increases pore water pressure in expansive soils, raising swelling force by 20%–30%.
-
Thermal effect:
Bit friction generates heat (temperature rise up to 40℃), intensifying soil shrinkage.
-
Mechanical disturbance effect:
Drill tool vibration destroys soil structure, reducing cohesion by 40%.
Numerical simulations show their combined action reduces borehole wall safety factor by 58%.water well drilling rig
Rig pengeboran Bangxin