Professional Manufacture for Reverse Circulation Drill pipe/Double wall drill rod
Double-arm drill pipe is also called double-layer drill pipe. It is composed of inner and outer layers of drill pipes (called inner tube and outer tube). The inner and outer pipes form an annuls, which is a channel for pumping flushing medium to the bottom of the hole during hydraulic rock drilling and center sampling drilling. The central hole of the inner tube is used to discharge the flushing medium and fixed as a whole, and the threaded buttons of the outer tube are connected between each double-walled drill pipe to ensure the transmission of torque and pressure. However, the plug-in method is mostly used between the inner pipes, which generally only serve to circulate the flushing medium. Therefore, a sealing device should be installed at the plug-in place.
Professional Manufacture for Reverse Circulation Drill pipe/Double wall drill rod
Double-arm drill pipe is also called double-layer drill pipe. It is composed of inner and outer layers of drill pipes (called inner tube and outer tube). The inner and outer pipes form an annuls, which is a channel for pumping flushing medium to the bottom of the hole during hydraulic rock drilling and center sampling drilling. The central hole of the inner tube is used to discharge the flushing medium and fixed as a whole, and the threaded buttons of the outer tube are connected between each double-walled drill pipe to ensure the transmission of torque and pressure. However, the plug-in method is mostly used between the inner pipes, which generally only serve to circulate the flushing medium. Therefore, a sealing device should be installed at the plug-in place.
Reverse Circulation Drill Rods Faber Thread
Heavy duty RC Drill Rods Faber Thread.
Roschen Reverse Circulation drill pipe used for the sandvik Reverse Circulation hammer, epiroc Reverse Circulation hammer.
The Reverse Circulation drill pipe is Faber Thread Pin-Box with field replaceable inner tube and cir clip retention system. This product can be used in the following Reverse Circulation systems:
Anti-rotation pin, secures longer life of the rod and inner tube. Centralizers along the inner tube. For less vibration, when drilling with tricone bits. External OD on the outer sleeve is 114 mm and 119mm on the tool joint. Inner tube is 2-1/2" so it permits a straight and smooth flow, no excessive wear due to tube inner section restriction and better sample evacuation is obtained.
The advantages of the FABER ™ system include the following:
- No connector tubes – inner tubes mate up automatically as the pipe is made up - Replaceable inner tubes – field replaceable with circlip system - Unique Tri layer heat treating provides "super long life"
- FABER ™ thread design – won't cross thread - Proven Product quality in the most difficult drilling in the world - This pipe is lighter than other competitors' with a torque strength more than three times the API required limits (Certified Engineering reports are available)
Professional Manufacture for Reverse Circulation Drill pipe/Double wall drill rod
RC Drill Pipe Technical Parameter | |||||
| Type | O.D of the outer tube (mm) | I.D of the inner tube (mm) | Out. diameter of joint (mm) | Type of threads | Effective length (m) |
| ROS50/20 | 50 | 20 | 50 | ROS 50 | 1; 1.5 |
| ROS73/35 | 73 | 35 | 73 | ROS 70 | 1; 1.5 |
| ROS76/32 | 76 | 32 | 78 | 3" Remet | 1, 1.5, 3 |
| ROS89/40 | 89 | 40 | 89 | 3" Remet | 1; 1.5,3,4.5,6 |
| ROS102/41 | 102 | 41 | 103 | 4" Remet | 1; 1.5,3,4.5,6 |
| ROS114/52 | 114.3 | 52 | 116 | 4 1/2" Remet/Metzke | 1; 1.5,3,4.5,6 |
| ROS114/38 | 114.3 | 38 | 114.3 | 4 1/2" Remet/Metzke | 1; 1.5,3,4.5,6 |
| ROS114/50 | 114.3 | 50 | 114.3 | 4 1/2" Remet/Metzke | 1; 1.5,3,4.5,6 |
| ROS114/65 | 114 | 65 | 156 | 4 1/2" Remet/Metzke | 1; 1.5,3,4.5,6 |
| ROS127/76 | 127 | 76 | 162/168 | 4 1/2" Remet/Metzke | 6; 7.6,9.5 |
| ROS127/76 | 127 | 76 | 184 | 5 1/2 FH | 6; 7.6,9.5 |
| ROS140/88 | 139.7 | 88 | 184 | 5 1/2 FH | 6; 7.6,9.5 |
| ROS219/130 | 219 | 130 | 240 | 6 5/8 API | 6; 7.6,9.5 |

Best regards,
Phiger Leo
Direct Line: 0086-137-6419 5009
WeChat/WhatsApp:: +86-137-6419 5009
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ROSCHEN@ INC.
ROSCHEN@ GROUP LIMITED
ROBERT ROSCHEN@ LIMITED
ROSCHEN@ HOLDINGS LIMITED
HEFEI ROSCHEN@ TOOL CO., LTD.
ROSCHEN@ GEOLOGICAL TOOL CO.,LTD.
SHANGHAI ROSCHEN@ INTERNATIONAL CO., LTD.
ROSCHEN@ GEOLOGICAL INSTRUMENTS CO., LTD.
EMAIL: roschen@roschen.com ; roschen@roschen.net
Website: http://www.roschen.com
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