Product Description
Prodrill Odex overburden Casing System hammer button bits Concentric drilling system
For small-hole sizes, Prodrill produces the ODEX Eccentric Overburden Drilling System, starting with the ODEX90 to suit 114mm O.D. casings. This two-piece system comprises the shanked bit holder and the eccentric pilot bit that is secured in the bit holder by a double interlocking pin. This is easily removed to allow for bit are sharpening or replacement. Prodemo ODEX overburden drilling systems are widely used in a variety of applications from well drilling and minipilling to rock anchoring and site investigation.
Application Range: It is suitable for drilling water wells , geothermal wells , short mircopiles ,medium mini-type grouting hole of building , dam and harbour project .
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 drilling.
How to order?
Casing Tube Out Diameter & Inner Diameter + Reamer Bit Diameter + Minimal Casing Shoe Inner Diameter + Hammer Shank Style
Model NO :185,210,240,280,305,365,432,460,510,553,596,645,694,744,846,948 Concentric Casing System Technical Data:
Thread of casing shoe for Concentric Casing System
Welding of casing shoe
Related Parts List
How to work:
1. Ring bit and casing shoe assembly is welded to casing prior to drilling. Lock the assembly into pilot bit with DTH (Down the Hole) or Top hammer. The pilot bit\'s upper shoulder engages the shoulder of the casing shoe.
2. DTH or Top 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.
COD610-Concentric overburden drilling System by DTH Hammer
Rock Drill Bits Advantages:
Full face head design for faster penetration and straighter hole less torque is required
Can drill in vertical, horizontal or any direction
Minimize disruption to the drilled hole
Varied ring bit diameters to suit different casing requirement
Application Range:
It is suitable for drilling water wells, geothermal wells, short micro piles ,medium mini-type grouting hole of building , dam and harbor project .
){kind=link}