Hard Rock DTH Drilling Tools Concentric Overburden Casing Bit Hole
Drlling
JCDRILL DTH Over Burden Concentric Bits
Description
The eccentric reamer drill is an overburden drilling system
designed for conditions where a cased hole is required. Collapsing
holes tend to make overburden drilling expensive, with lost
drilling equipment and down time.
The eccentric designed bit rotates outward and drills a larger
diameter hole than the casing, avoiding cave-ins, wash-outs, and
other problems common in normal drilling operations in soft and
gravel-type strata or loose rock. Since 90% of the world's
overburden drilling is in loose strata, potential utilization is
enormous.
After reaching the designated depth, the reamer-bit is retracted by
reversing the direction of the rotation and by applying tension on
the reamer-bit, which has a taper and will retract into the casing
for easy removal of the entire drill-string. This leaves the casing
in place for other applications or for removal at a later date. The
method is designed for use with flush joint threaded pipe or
welded-type casing and provides a bit size for a wide variety of
different casing wall thicknesses.
Application
Parametre
Usage
| Minimum Order Quantity: | N/A |
| Price: | |
| Packaging Details: | Standard Export Delivery Package |
| Delivery Time: | 7days |
| Payment Terms: | T/T |
| Supply Ability: | Based on Detailed Order |
Certification
Delivery
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