OD drilling

OD (Overburden Drilling) is a system for top hammer drilling using an inner drill string, usually a T45 rod with rock bit on it, and an outer casing with a ring bit (OD casing). You can choose between, first drilling the casing and then drill through it with the inner drill string, or you drill down the casing together with the inner drill string. The benefit of OD is that it is designed to enable pulling the casing up so it can be reused. The OD system we sell at Geomek is made by Klemm

Art. nr.
Benämning
73200022
OD 101.6 Casing 1220 welded.
73200021
OD 101.6 Casing welded 3050.
73200019
OD 101.6 Ring bit cutting.
73200018
OD 101.6 Ring bit pin sphere.
73200062
OD 101.6 Ring bit internal thread.
73200030
OD 101.6 ø112 Ring bit pin.
73200020
OD 114 Casing welded 1220.
73200015
OD 114 Casing welded 3050.
73200005
OD 114 Ring bit cutting.
73200006
OD 114 Ring bit pin
73200017
OD 133 Casing welded 1220.
73200016
OD 133 Casing welded 3050.
73200063
OD 133 Ring bit full pilot bit.
73200009
OD 133 Ring bit pilot bit
73200031
OD X 140 Ring bit cutting.
73200032
OD X 150 Ring bit cutting.