|
Slurry boring is the basic form of boring originally patented by Gilbert Turner, founder of BorTunCo.
The name slurry boring comes from the use of a bentonite bore gel during the boring operation. The most common type of Slurring boring is back reaming.
Step 1 - Back reaming requires two shafts or bore pits, the boring shaft and the exit shaft.
Boring shaft |
Exit shaft |
Step 2 - The process is begun by “shooting” a pilot hole along the desired line and grade. Historically this step is unguided or blind, meaning the process is repeated until the pilot bit comes out at the desired point. One alternative is to guide the pilot bit using similar equipment to a directional driller (see guided boring).
Shooting a pilot |
Step 3 - The pilot bit is then exchanged for a cutter or reamer, and the hole is cut from the exit shaft back to the boring shaft.
Cutter is installed and pulled back thru the pilot hole
 |
 |
 |
 |
Step 4 - The final step in this process is to install a casing or the carrier pipe whichever is installed first. Typically the installation is done by the contractor.
Slurry bore after cutter and plug |
Pipe installation by Contractor |
|
