Payment & Shipping Terms:
|Parts Name:||Over Burden Bits||Brand:||JCDRILL|
|Sample Order:||Support||Usage:||Hole Drlling|
Hard Rock DTH Drilling Tools Concentric Overburden Casing Bit Hole Drlling
JCDRILL DTH Over Burden Concentric Bits
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.
|Minimum Order Quantity:||N/A|
|Packaging Details:||Standard Export Delivery Package|
|Supply Ability:||Based on Detailed Order|
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