symmetric overburden drilling system manufacturer

FOB Reference Price:Get Latest Price
US $100-600 / Piece | 1 Piece/Pieces (Min. Order)
Supply Ability:
10000 Piece/Pieces per Month
Port:
Xiamen
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Overview
Quick Details
Place of Origin:
Fujian, China (Mainland)
Brand Name:
BESTLINK
Type:
Drill Bit
Machine Type:
Drilling Tool
Certification:
API
Material:
High Manganese Steel
Processing Type:
Forging
Use:
Well Drilling
Diameter:
57mm--660mm
Color:
Yellow,red,gold
Packaging & Delivery
Packaging Details
By wooden box
Delivery Time
within 20 days after receiving your TT payment

symmetric overburden drilling system/Eccentric overburden drilling system

 

Application Range: It is suitable for drilling water wells , geothermal wells , short miscopies ,medium mini-type grouting hole of building , dam and harbor project . 
1. Ring bit and casing shoe assembly is welded to casing prior to drilling. Lock the assembly into pilot bit with hammer. The pilot bit’s upper shoulder engages the shoulder of the casing shoe. 
2. Hammer’s percussive energy is transferred through the pilot and ring bits, crushing rock . Part of impact energy advances casing. 
3. On completion of drilling and casing , the drill string with pilot bit is retrieved by a slight reverse rotation to unlock the bayonet coupling . The ring bit stays in the hole , and can be recovered only if the casing is retrieved 


 

 

 

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