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Remet 4 1/2" REVERSE CIRCULATION DRILL ROD For Atlas Copco RC 50 Reverse Circulation Drilling
Introduction
ROSCHEN offers a complete line of premium quality reverse
circulation, drill rods, in sizes from 3 1/2" to 10 3/4", and with
a number of thread connections. All Reverse Circulation rods are
manufactured using the most advanced technologies and specifically
engineered to provide high strength, excellent wear resistance, and
long life.
RC, dual wall drill rods are manufactured with an outer drill rod
and an inner tube located inside the rod. When the drill rods are
threaded together, the inner tubes seal together to provide a
continuous route for cuttings to travel from the bit face to the
surface for collection.
The RC method employs dual wall reverse circulation drill rods that
comprise an outer drill rod, with an inner tube located inside the
drill rod. The inner tubes overlap, and seal on the tube below with
O rings when the drill rods are screwed together. These inner tubes
provide a continuous sealed pathway for the drill cuttings to be
transported from the bit face to the surface. The circulating
medium, in most cases high-pressure air, enters the annulus between
the rod and tube via the air swivel, which is normally part of the
drill string, or sometimes mounted on top of the rotation head. The
air travels down the annulus to the drilling tool, which is usually
an RC hammer, or can be a blade bit or tricone roller bit. As in
conventional open hole drilling, the air powers the drilling tool
and the exhaust air carries the cuttings.
Parameters
REVERSE CIRCULATION DRILL ROD SPECIFICATIONS | |||||||
Thread Type | Remet | Remet | Remet | Metzke | Metzke | Matrix | Matrix |
Rod O.D. | 3 1/2" | 4" | 4 1/2" | 4" | 4 1/2" | 4" | 4 1/2" |
Outer Tube O.D. | 88.9mm | 101.7mm | 114.3mm | 101.7mm | 114.3mm | 101.7mm | 114.3mm |
Outer Tube I.D. | 81.8mm | 94.6mm | 107.2mm | 94.6mm | 107.2mm | 94.6mm | 107.2mm |
Outer Tube W.T. | 5.3mm | 7.1mm | 7.1mm | 7.1mm | 7.1mm | 7.1mm | 7.1mm |
Inner Tube O.D. | 38.1mm | 50.8mm | 63.5mm | 50.8mm | 63.5mm | 50.8mm | 63.5mm |
Inner Tube I.D. | 32.6mm | 45.3mm | 58mm | 45.3mm | 58mm | 45.3mm | 58mm |
Inner Tube W.T. | 5.5mm | 5.5mm | 5.5mm | 5.5mm | 5.5mm | 5.5mm | 5.5mm |
Spanner Flat | 90mm | 90mm | 90mm | 90mm | 90mm | 90mm | 90mm |
Weight 3.0m | 75kg. | 75kg. | 95kg. | 75kg. | 95kg. | 75kg. | 95kg. |
Weight 6.0m | 120kg. | 150kg. | 168kg. | 150kg. | 168kg. | 150kg. | 168kg. |
Please contact your ROSCHEN representative for additional details,
and ordering assistance.
Pictures