Beijing Jincheng Mining Technology Co., Ltd.
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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.
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| 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 |
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We have many stock. As usual, we can delivery the goods as soon as we get the full payment.
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