Reaming Construction Technology
(1) Dual Drilling coordinate operations hole opener drilling in and out of the soil point, each with a bench
Machines, one to provide torque, providing a pulling force to avoid long drill
Reamer cause loss of control, reducing the risk of reaming construction of mention
High speed reaming.
(2) high hardness rock reaming the pilot hole after construction is completed in the first
The first was high hard reaming, application engineered hard rock section of 370 m
Reaming process of rock in the rock section with palm-style closely spaced cones reaming
Implement multiple pre-reaming.
(3) The change is completed to drill reaming Rocks, exit the rock expand
Hole device, the reaming drill rock excavated from the point when pulled, on a subsequent drilling
Replace the drill direction lever, CLAY segment reaming.
(4) Multiple reaming reaming construction, mud flowback carry long distance
With sediment, the flow resistance is large, the effect is clear holes or wash hole is not ideal,
The effective size of the hole caused by roller reamer drilling a relative decrease in the underground ring. Using multiple expansion
Hole cutter each cutting down the soil with respect to circulation of cuttings
The mud, the desired reduction in emissions back, so it does not make
Into the hole blockage, the effective size of the annular space has been fully guaranteed.
Concrete construction, in paragraph rock and clay in a total of seven times reaming,
Effectively reduces the resistance of the reamer and shorten the reaming cycle.