127mm RC Water Well Drill Rod Double Wall Drill Pipe For Rc Drilling
Double-wall drill pipe is composed of inner and outer layers of drill pipe (called inner pipe and outer pipe). An annular gap is formed between the inner and outer pipes, which is a channel for pumping flushing medium to the bottom of the hole during hydraulic rock drilling and central sampling drilling.
The central hole of the inner pipe is fixed as a whole to discharge the flushing medium, and each double-wall drill pipe is connected with the thread of the outer pipe to ensure the transmission of torque and pressure. The inner tube is mostly plugged, which generally only functions to circulate and flush the medium. Therefore, a sealing device should be provided at the plug.
| 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) |
| GL50/20 | 50 | 20 | 50 | 1; 1.5 | |
| GL73/35 | 73 | 35 | 73 | 1; 1.5 | |
| GL89/40 | 89 | 40 | 89 | 1; 1.5 | |
| GL76/32 | 76 | 32 | 78 | 3" Remet | 3 |
| GL102/41 | 102 | 41 | 103 | 4" Remet | 3; 6 |
| GL114/52 | 114.3 | 52 | 116 | 4 1/2" Remet | 3; 6 |
| GL114/38 | 114.3 | 38 | 114.3 | 4 1/2" Metzke | 3; 6 |
| GL114/50 | 114.3 | 50 | 114.3 | 4 1/2" Remet | 3; 6 |
| GL114/65 | 114 | 65 | 156 | 4 IF | 6 |
| GL127/76 | 127 | 76 | 162/168 | 4 1/2 IF | 6; 9.5 |
| GL127/76 | 127 | 76 | 184 | 5 1/2 FH | 9.5 |
| GL140/88 | 139.7 | 88 | 184 | 5 1/2 FH | 6; 9.5 |
| GL219/130 | 219 | 130 | 240 | 6; 9.5 |
Water Well Drill Rod is mainly used for borehole water well drilling and geothermal drilling etc.
The double-wall drill pipe is conducive to drilling through complex formations.
The circulation of compressed air in the double-wall drill pipe is like a closed-circuit circulation system.
Even if it encounters an old hole or a karst cave, once the drill tool reaches the bottom of the hole, the normal circulation will resume immediately. , which cannot be achieved in conventional drilling methods.
Packing: The Water Well Drill Rod is normally packed by steel frame.
Delivery: Normally 15 days after down payment.
Shipping method: by sea
Hot extrusion machine
Adopt T-connector hydraulic for joints forging, to improve the metallo graphical fibrous tissue and impact toughness. So guarantee the comprehensive mechanical properties of the welding joints.
Heat treatment equipment
To use controllable atmosphere heat treatment equipment. Ensure each workpiece sorbite transfermation more fully, greatly enhance the mechanical properties of joints.
Thread machining equipment
To use CNC machine tool to thread finish machining and thread close tolerances.
Our products are widely used in the scope of mining, water well drilling and exploration, anchor grouting project, side slope protection engineering, oil and gas engineering, underwater rock drilling & blasting operations of seaport channel, hydropower project, national defense projects, etc.
We own the most advanced pipe production line in China.The technology of heat treatment product line has achieved to the world-class leading levels, we have 200T Friction Welding Machine is the largest model welder, the largest welding capacity can reach drill rod of 200mm OD.
The tube body upsetting technology has achieved the advanced level.Thickening of the anti-extrusion molding of pipe end technology can make the transition zone of internal and external upsetting reach the length to 200mm above.
And the one-piece drilling upsetting technology is more outstanding.
Q: Are you a factory or a trading company ?
A: We are an integrated corporation specialized in manufacturing and exporting.
Q: What is your payment terms?
A: We can accept T/T,L/C.
Q:.What is your MOQ?
A: No requirement for testing and trial order.
