Payment & Shipping Terms:
|Casing O.D:||114mm||Casing Wall Max:||10mm|
|Ring Bit I.D:||73.5mm||Ring Bit O.D:||120.3mm|
|Pilot Bit O.D:||92.5mm||Code No.:||RoBit-SOD 114|
RoBit-SOD 114 Symmetix Casing System by Top Hammer;Symmetric / Concentric Overburden Casing Drilling System
Rock drilling tools manufacturer ProDrill: Symmetric drilling system is designed to drill and case a hole simultaneously through unstable ground conditions. The driver bit incorporated with a satisficial ring or reusable ring makes a full face head design which significantly improves the penetration rate and hole straightness of drilling. The internal flushing grooves together with the built-in casing shoes gives a good seal to the button of the drilling hole, and thus minimizing the disruption of the surrounding of the drill hole.
Concentric eccentric with tube drill bit with reaming ring Concentric high-pressure drilling tool Drilling hole with high drilling efficiency, to prevent collapse of the hole, the hole is not bent and is mainly used for: hard, loose, broken or gravel, etc. The drilling of the formation into the casing has the advantages of good wall protection performance and high drilling efficiency.
RoBit SOD 114 Symmetix Casing System with rock drill bits: Ring bit and Pilot bit by Top Hammer
Application Range: Suitable for drilling water wells, geothermal wells, medium mini-type grouting hole of building, dam,tunnel umbrella 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.
Concentric drill bit and eccentric drill bit Suitable for mining and quarrying
Field, tunnel, highway, hydropower project, road and bridge, drilling and digging well, mountain anchoring, geothermal air conditioning hole, earth and stone
Square engineering, drilling and blasting, etc. Mainly used in hard, loose, broken or gravel, etc. need to follow up at the same time
The drilling of the casing layer has the advantages of good wall protection performance, high drilling efficiency and no bending deformation of the hole.
System with drill through pilot bit
1. Casing is installed until seated into bedrock.
2. Drill through pilot bit is unlocked from ring bit and after that pilot bit drills a rock socket. Drill string is pulled out from the hole.
3. Reinforcement element is installed and concrete poured into the hole.
Features and Benefits
• Unique sliding mechanism leads to absolute workability
• Simple parts replacement
• Low running cost
• Same performance in horizontal drilling
• Prevent jamming with internal air exhaust
Forepoling,also known as tube umbrella,tunnel umbrella, is an application used to strengthen tunnel roof in broken rock condition.Drilling system consists of casing tubes which are drilled through the overburden as an umbrella and filled with grouting.ProDrill symmetric casing system allows easy driving of the casing tubes into the ground with low torque demand.
ProDrill symmetric casing overburden drilling system mostly used in forepoling are ProDrill+88,9/8, ProDrill 114,3/10,and ProDrill 139,7/10.
|Code No.||Casing O.D.||Wall thickness||Ring bit I.D.||Ring bit O.D.||Polit bit O.D.|
|Code No.||Casing wall max.thickness||Ring bit||Pilot bit||Unit|
ROBIT-SOD and Atlas-SOD