Double head drilling systems for overburden drilling
with combination rotary head / hydraulic drifter
(casing and inner rod) or rotary head / rotary head
(casing and inner rod with DTH hammer)
with combination rotary head / hydraulic drifter
(casing and inner rod) or rotary head / rotary head
(casing and inner rod with DTH hammer)
1. Double head drilling systems based on duplex casing for combination of rotary head and hydraulic drifter. Suitable for grounds including hard rock, hard rock banks or gravel, requiring precise drilling (grouting, umbrella drilling or anchor). Preferred flushing: water or water-air-mix.
2. Double head drilling systems based on double casing for combination of rotary head / rotary head. Suitable for grounds including hard rock, hard rock banks or gravel, requiring precise resp. deep drilling.
The tungsten carbide drilling tools are specifically manufactured to suit the ground conditions. Concentric or excentric drilling systems are available, on request.
Double head drilling systems
Ø 133 x Ø 76.1 (inner rod)
with rotary head / hydraulic drifter combination for grouting
Ø 133 x Ø 76.1 (inner rod)
with rotary head / hydraulic drifter combination for grouting
|
D (mm)
|
88.9
|
114.3
|
133
|
139.7
|
152.4
|
|
d (mm)
|
1 1/2" T38
|
1 3/4" T45
|
1 3/4" T45
|
2 1/4" T51
|
101.6
|
|
oder
|
51
|
76.1
|
76.1
|
88.9
|
101.6
|
|
D (mm)
|
114.3
|
133
|
139.7
|
152.4
|
177.8
|
|
d (mm)
|
76.1
|
88.9
|
88.9
|
101.6
|
114.3
|
|
DTH
|
3"
|
4"
|
4"
|
5"
|
5"
|
Please click to enlarge.