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Chengdu Drillrocker Inc.
pdc bit;dth hammer;dth bit;casing system;water well rig;core drill rig;anchor...
 
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Concentric Overburden Driling System (High Air Pressure)

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Title： Concentric Overburden Driling System (High Air Pressure) 
Brand： DR
Unit price： Negotiable
MOQ： 1
Quantity： 10000
Delivery date： Since the payment date Days delivery
Contact： Jack （Ms.）    
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Concentric Overburden DrilingSystem (High Air Pressure)

TypeHole Diameter
(mm)		NO. Air HoleGauge ButtonsFront
Buttons		Casing Size
( Wall Thickness * Outerdiameter)		Size
(Diameter*L)		Weight
(KG)		Hole deep(m)
(f=4~6)		Match DTH Hammer
DR146Φ1563Φ14*6Φ14*5Φ146(5~7.5)Φ129X40524300~1000DR340
DR168Φ1823Φ14*6Φ14*6Φ168(5~10)Φ146X55030300~1000DR350
DR183Φ1963Φ14*8Φ14*8Φ183(5~10.5)Φ161X68838300~1000DR350/360
Working Principles:
A. When drilling, the reamer swings out and drills a hole largerthan the externa diameter of the casing tube.
B. When the required depth has been reached, the drill is reversedand the reamer swings in to its minimum diameter, allowing the bitto be lifted up through the casing, which is left in the hole.
C. Drilling can continue with an ordinary DTH drill bit.

HREE reamer wings advantages:
1. multi-orientation simultaneously crush, so as to bear stressevenly and subsequently impact resistance.
2. dislaging easily
3. Drilling rod and casing could accelerate following up.
4. Operation, aseemble and unassembled the equipment is easy.
5. Multi-axis suspension is adopted, to avoid reamer from fallingof.
 

 Related Keywords: concentric overburdendrilling , drilling system , drillingtools , Concentric Overburden DrilingSystem 


Concentric Overburden Driling System (High Air Pressure)
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