- Eccentric overburden drilling Bit with 3 pieces
- 2017-12-23 06:19
- A brief introduction of Eccentric Casing system:
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 ...
- Symmetric overburden drilling Bit with 3 pieces
- 2017-08-30 06:38
- Symmetric overburden system is a system comprised of an ingeniously simple concentric method of drilling through overburden with casing. Symmetric can drill straight holes at any angle (including horizontal) and to depths beyond 100 meters. Working t...
- Dia.140mm DTH Hammer Bit DHD350,COP54
- 2017-07-23 02:44
- Features:
1 Energy-saving and more durable due to high quality of alloy steel materials and advanced heat treatment adapted.
2. Good flushing effect ensure high drilling rate.
3. Good hole cleaning ability.
4. We can design and manufacture...