Email: sales@prodrill.com.cn
Tel:0086-18959243380
Addr: Room 805 C1 Wanda Plaza, No.5 Jinzhong Road, Huli District, Xiamen, China
Casing tube for SOD168
- Casing O.D.: 168.3mm
- Casing Wall Max: 10mm
- Ring Bit I.D.: 135mm
- Ring Bit O.D.: 179mm
- Pilot Bit O.D.: 146.5mm
- Drill Pipe: 76,89mm
Retrieable ( Recyclable ) Symmetric Overburden Drilling Casing System, Casing Tube OD168 mm, ID155mm, including Polit Bit, Ring Bits + Casing Shoe.
Premium high qulity steel code DZ40 Casing Tube dia 168.3mm*3m*10mm left threaded pin and box threaded in casing pipe for SOD168 symmetric Casing System
Hydraulic puller casing tube for symmetric casimg system SOD168, 219mm
Premium high qulity sub-adaptor casing tube for symmetric casing system SOD168
Prodrill overburden drilling systems offers three types of solutions for casing and drilling simultaneously,ODEX-P drilling, symmetric drilling and Concentric drilling , casing advancing in overburden has becomemore ingenious.
Prodrill overburden tools enable simultaneous drilling-and-casing through overburden, passing easilythrough large boulders, soil, silt, clay, sand, and gravel not solid ground condition,Once the requireddepth is reached, the drill string is removed, leaving the casings in place to serve as channels for grout,cables or explosives.Prodemo overburden casings are always reused. Since the casings used with innovative systems can be light-weight and inexpensive.Prodemo three systems permit continued normaldrilling into the bedrock if required.
Prodrill Casing Tube specification table for Casing Drilling System
Application Range: suitable for drilling water wells, geothermal wells, short mircopiles, 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
4. Drilling continues to the desired depth in the bedrock using a conventional drilling.
