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Rotary Drilling Reverse Circulation Hammer Used To Collect Rock Samples Quickly And Efficiently
Reverse Circulation Hammer Introduction
REVERSE CIRCULATION PERFORMANCE TOOLING
Reverse circulation (RC) drilling is used to collect rock samples
quickly and efficiently using a large rotary drill and air
compressor. The higher penetration rate and lower cost per meter of
RC drilling make it ideal for obtaining mineral samples in the
early phases of an exploration project.
REVERSE CIRCULATION DRILLING
Reverse circulation (RC) drilling uses a dual-walled drill rod with a cutting tool, typically a pneumatic reciprocating hammer, to produce a bore hole in a rock formation and to retrieve rock chips and cuttings from the bottom of the hole. Reverse circulation is achieved by blowing air down the rods in the annulus between the inner and outer tube, causing differential pressure that creates lift for cuttings that travel up the inner tube to the surface. RC drilling has proven itself as a fast and economical means to collect mineral samples and has grown in popularity since its introduction in Germany in the 1960s.
SWIVELS
Used in either pure RC drilling or conventional Down The Hole (DTH)
methods, Roschen swivels are a cost effective alternative to
conventional top and bottom swivel operation; and with only one set
of connections, they provide additional safety benefits and lower
maintenance requirements.
RC DRILL STRING
The RC drill string is designed to deliver high pressure and high volume air to the cutting tool at the bottom of the bore hole. Once a drill rig is selected, subs and adapters make it possible to connect a drill string to the drill head, in many different combinations depending on the choice of tools used.
Reverse Circulation Hammer FEATURES:
Reverse Circulation Drilling Rods
Roschen offers drill rods with Faber, Matrix, Metzke, and Remet
type threads for complete compatibility with all systems. Our
robust drill pipe provides 360° of contact from inner tube collar
to outer tube and is designed to be easily replaced in the field,
minimizing costly downtime.
Faber
Faber-type thread is one of the recognized standard threads used in
reverse circulation drilling. Roschen Faber-type drill pipe
features high-grade alloy tool joints with heat treated pins for
superior resistance to damage, high strength precision mid-bodies
for long life and ease of assembly, and field replaceable inner
tube assemblies. Faber type thread uses a four threads per inch
design.
Matrix
Matrix-type thread is another recognized standard in RC drilling.
Roschen Matrix-type drill pipe features high-grade alloy tool
joints with heat treated pins for superior resistance to damage,
high strength precision mid-bodies for long life and ease of
assembly. In Matrix type rod, the inner tube can be fixed with
rubber stabilizers or field replaceable with steel stabilizers.
Matrix-type RC pipe features sealing o-rings on the pin portion of
the inner tube assembly, providing optimal inner tube sealing and
airflow. Matrix-type thread uses a coarser, more durable three
threads per inch design.
Metzke
Metzke-type thread is one of the recognized standard threads used
in reverse circulation drilling. Roschen Metzke-type drill pipe
features high-grade alloy tool joints with heat treated pins for
superior resistance to damage, high strength precision midbodies,
for long life and ease of assembly, and field replaceable inner
tube assemblies with special joints that offer 360-degree
stabilization with minimal flow restriction. Metzke-type thread
uses a four threads per inch design and more robust 90° tool joint
mating surface.
Remet
Remet-type thread is another recognized standard in RC drilling.
Roschen Remet-type drill pipe features high-grade alloy tool joints
with heat treated pins for superior resistance to damage, high
strength precision midbodies, for long life and ease of assembly,
and field replaceable inner tube assemblies with special joints
offer 360-degree stabilization with minimal flow restriction.
Remet-type RC pipe features sealing o-rings on the pin portion of
the inner tube assembly, providing optimal inner tube sealing and
airflow. Remet-type thread uses a coarser, more durable three
threads per inch design.
Reverse Circulation Hammer Parameters
| ROSCHEN RC Hammers Specifications | |||||||||
| Hammer Size | Hammer | Bit Shank | ROSCHEN Code | Hole Range (mm) | External Diameter (mm) | Length (without bit) mm | Weight (N.W.) kgs | Connection Thread | Working Pressure |
| 3" | RE531 | RE531 | ROS RC 30 | 84-100 | 81 | 1069 | 29 | 3“ Remet | 1.0-3.0Mpa |
| 3" | RE035 | RE035 | ROS RC 35 | 84-105 | 85 | 1075 | 35 | 3“ Remet | 1.0-3.0Mpa |
| 4 1/2" | RE004 | RE004 | ROS RC 40 | 111-127 | 107 | 1252 | 52 | 3.5"-4" Remet 4" Metzke | 1.0-3.0Mpa |
| 4 1/2" | RE540 | RE540 | ROS RC 45 | 111-127 | 107 | 1252 | 52 | 3.5"-4" Remet 4" Metzke | 1.0-3.0Mpa |
| 5" | RE040 | RE040 | ROS RC 50 | 113-130 | 109.5 | 1191 | 57 | 3.5"-4" Remet 4" Metzke | 1.0-3.0Mpa |
| 5" | RE542 | RE542 | ROS RC 50 | 113-130 | 109.5 | 1191 | 57 | 3.5"-4" Remet 4" Metzke | 1.0-3.0Mpa |
| 5" | RE543 | RE543 | ROS RC 50 | 120-135 | 116 | 1191 | 62 | 3.5"-4" Remet 4" Metzke | 1.0-3.0Mpa |
| 5" | RE545 | RE545 | ROS RC 50 | 122-135 | 117.5 | 1261 | 65 | 4"-4.5" Remet 4"-4.5" Metzke | 1.5-3.5Mpa |
| 5 1/2" | RE547 | RE547 | ROS RC 55 | 130-146 | 124.5 | 1270 | 71 | 4.5" Remet 4.5" Metzke | 1.5-3.5Mpa |
| 5 1/2" | RE052 | RE052 | ROS RC 55 | 130-146 | 124.5 | 1270 | 71 | 4.5" Remet 4.5" Metzke | 1.5-3.5Mpa |
| 5 3/4" | RE054 | RE054 | ROS RC 55 | 130-146 | 124.5 | 1270 | 85 | 4.5" Remet 4.5" Metzke | 1.5-3.5Mpa |
| 5 3/4" | RE140 | RE140 | ROS RC 55 | 130-146 | 124.5 | 1270 | 85 | 4.5" Remet 4.5" Metzke | 1.5-3.5Mpa |
| 5" | PR40 | PR40 | ROS RC 50 | 124-142 | 120.5 | 1362 | 80.5 | 3.5"-4.5" Remet 3.5"-4.5" Metzke | 1.5-3.5Mpa |
| 5 1/2" | PR52 | PR52 | ROS RC 55 | 126-142 | 121 | 1227 | 68.5 | 4"-4.5" Remet 4"-4.5" Metzke | 1.5-3.5Mpa |
| 5 1/2" | PR52R | PR52/PR52R | ROS RC 55 | 130-146 | 124 | 1225 | 65 | 4"-4.5" Remet 4"-4.5" Metzke | 1.5-3.5Mpa |
| 5 1/2" | PR54 | PR54 | ROS RC 55 | 135-150 | 130 | 1294 | 84.5 | 4.5" Remet 4.5" Metzke | 1.5-3.5Mpa |
| 6" | MX5456 | MX5456 | ROS RC 60 | 136-150 | 132 | 1362 | 90 | 4.5" Remet 4.5" Metzke | 1.5-3.5Mpa |
| 6"~6 1/2" | RC62/RC62R | RC62/RC62R | ROS RC 65 | 152-190 | 146 | 1320 | 110 | As Request | 1.5-3.5Mpa |
| 8" | RC82/RC82R | RC82/RC82R | ROS RC 80 | 190-250 | 180 | 1395 | 185 | As Request | 1.5-3.5Mpa |
| 10" | RC100/RC100R | RC100/RC100R | ROS RC 100 | 250-370 | 240 | 1528 | 328 | As Request | 1.5-3.5Mpa |
| Notes: | |||||||||
| Metzke, Remet thread is available! | |||||||||
| Any special type shank of RC Hammer will be available by requests. | |||||||||
Reverse Circulation Hammer Usage
