Home > Products > Eccentric Overburden Drilling Equipment > Rock drilling machine/Most advanced and faster Eccenetric Overburden Rock Air Drilling Tools(NOD240)
Rock drilling machine/Most advanced and faster Eccenetric Overburden Rock Air Drilling Tools(NOD240)
- 3000 Piece / Pieces per Month
- Shanghai
- T/T Credit Card
Product Details
Place of Origin: | Hunan, China | Brand Name: | New diamond | Model Number: | NOD240 |
Type: | Drill Bit | Machine Type: | Drilling Tool | Certification: | Other, ISO9001:2008 |
Material: | Carbide | Processing Type: | Forging | Use: | Well Drilling |
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.
NOD240 Eccentric Overburden Drilling Equipment
| 1 | Casing Tube | Maximum O.D.: 273mm Minimum O.D.: 260.4mm |
2 | Drill Pipe | Connection Thread: API3 1/2”Reg O.D.: 114mm Wrench Flats: 95mm | |
3 | Guide Sleeve | Effective length: 343mm | |
4 | DTH-Hammer | ND85, Cop84, NSD8, DHD380, NQL80 | |
5 | Casing Shoe | L3=110mm L4=65mm D3=259mm D4=241mm | |
6 | Guide Device | L1=70mm L2=190mm D1=240mm D2=257mm | |
7 | Reamer | D5=238mm L5=100mm Reaming Diameter: 308mm Reamer has 16*16 buttons | |
8 | Pilot Bit | D6=240mm L6=89.5mm Gauge button: 12*18 Front button:32*16 |
Technical Data
Contact Us
- Hunan New Diamond Construction Machinery Co., Ltd.
- Contact nameRick Liao
- Phone0086-731-89708148
- AddressMeiguiyuan, Yuelu district, Changsha city, Hunan, China Changsha,Hunan
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