Home > Products > Symmetric Overburden Drilling Equipment > Eccenetric Overburden Rock Air Drilling Tools(NOD90)
Eccenetric Overburden Rock Air Drilling Tools(NOD90)
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Product Details
| Place of Origin | Hunan, China | Brand Name | New diamond | |
| Model Number | NOD90 | Type | Drill Bit | |
| Machine Type | Drilling Tool | Certification | Other, ISO9001:2008 | |
| Material | Carbide | Processing Type | Forging | |
| Use | Ore Mining |
Product Description
Eccentric Overburden Drilling Equipment:
1. 10 years manufacturing experience;
2. Certificate: ISO9001:2008
3. Material: Carbide
Eccentric Reamer System Step-by-step
1. When drilling starts, the reamer swings out and reams the pilot-hole wide enough for the casing tube to slide down behind the drill bit assembly.
2. When the required depth is reached, rotation is reversed carefully, whereupon the reamer swings in , allowing the drill bit assembly to be pulled up through the casing.
3. Casing tubes that are to be left in the drill hole should be sealed at the bottom of the hole by means of cement grout or some other sealing agent.
4. Drilling continues to the desired depth in the bedrock using a conventional drillstring.
NOD90 Eccentric Overburden Drilling Equipment
| 1 | Casing Tube | Maximum O.D.: 115mm Minimum O.D.: 102mm |
2 | Drill Pipe | Connection Thread: API2 3/8”Reg O.D.: 76mm Wrench Flats: 65mm | |
3 | Guide Sleeve | Effective length: 174mm | |
4 | DTH-Hammer | ND35, Cop32, IR3.5, NQL30 | |
5 | Casing Shoe | L3=90mm L4=55mm D3=101.7mm D4=93mm | |
6 | Guide Device | L1=35mm L2=138mm D1=92mm D2=100mm | |
7 | Reamer | D5=91mm L5=70mm Reaming Diameter: 123mm Reamer has 4*12 buttons | |
8 | Pilot Bit | D6=90mm L6=59mm Gauge button: 8*12 Front button:6*10 |
Technical Data
Contact Us
- Hunan New Diamond Construction Machinery Co., Ltd.
- Contact nameRick Liao Chat Now
- Phone0086-731-89708148
- AddressMeiguiyuan, Yuelu district, Changsha city, Hunan, China, Yueyang, Hunan
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