Drill pipe
Φ114 reverse circulation drill pipe is a dual-wall drill pipe used in RC reverse circulation drilling systems, mainly composed of a high-strength alloy steel outer tube and a wear-resistant inner tube. During drilling, cuttings and ore samples can return to the surface through the inner tube channel, which helps improve sample recovery efficiency and reduces the risk of cross-contamination between samples from different depths.
This model has an outer tube diameter of 114mm, wall thickness of 8-10mm, length range of 1500-9500mm, and connection threads available in Remet, Metzke, FH or IF. The product is suitable for mining exploration, ore sampling and other geological drilling projects requiring reverse circulation sampling.
| Product Model | Φ114 RC |
| Product Name | Φ114 Reverse Circulation Drill Pipe / Dual-Wall Drill Pipe |
| Tube Outer Diameter | 114 mm (4 1/2 inch) |
| Wall Thickness | 8-10 mm |
| Length | 1500-9500 mm |
| Thread Type | Remet / Metzke / FH / IF |
| Structure | Dual-wall structure: high-strength alloy steel outer tube + wear-resistant inner tube |
| Main Applications | RC reverse circulation drilling, mining exploration, ore sampling, geological drilling |
The dual-wall drill pipe forms independent air flow and cuttings recovery channels through the outer and inner tubes. Cuttings and samples generated during drilling can be transported to the surface through the inner tube, which facilitates rapid recovery of drill cuttings samples and reduces interference from borehole wall materials on samples.
The outer tube of the drill pipe is made of high-strength alloy steel, with both ends internally upset, and the connection areas are strengthened through friction welding and tempering processes to enhance strength and stability, suitable for continuous drilling and high-load operations.
The inner tube uses wear-resistant materials to withstand continuous transport of high-speed cuttings and samples, helping to improve the durability of the reverse circulation drill pipe in mining sampling operations.
Φ114 reverse circulation drill pipe can be configured with Remet, Metzke, FH or IF connection types. When ordering, the specific thread specifications should be confirmed according to the drilling rig, power head, RC hammer and existing drill tool system.
Reverse circulation drilling is a drilling method that emphasizes rapid sampling and efficient operation. Its samples return to the surface through the inner tube of the drill pipe, making it easier to collect ore samples in a concentrated manner compared to ordinary discharge methods, and helping to reduce cross-contamination between samples from different strata. For mining resource exploration and grade control drilling, it can improve sampling efficiency and shorten the construction cycle.
Φ114 dual-wall reverse circulation drill pipe is mainly used for RC sampling boreholes in gold, copper, iron and other mineral resource exploration, and can also be used for geological surveys, ore body boundary confirmation, grade control and other drilling projects requiring rapid acquisition of drill cuttings samples.
Both ends of the tube can be internally upset, followed by tempering after friction welding; drill pipe joints can undergo rough machining, quenching and tempering heat treatment, finish machining, and surface phosphating and nitriding treatment. Through standardized thread processing and gauge inspection, the consistency, wear resistance and assembly reliability of threaded connections can be improved.
When purchasing Φ114 reverse circulation drill pipe, it is recommended to provide the drilling rig model, RC hammer specifications, drill pipe length, thread type, target hole depth and main formation information, so as to confirm the compatibility of the drill pipe with the entire reverse circulation drilling tool system.
Different drilling rig configurations, RC hammer specifications, hole depths, formation conditions and operating methods will affect the actual performance and service life of the drill pipe, and the final result shall be subject to on-site working conditions and technical matching results.
We are a professional drilling equipment manufacturer specializing in the research and development, production and supply of water well drilling rigs, core drilling rigs, reverse circulation drilling rigs, down-the-hole drilling rigs, truck-mounted drilling rigs and mineral exploration equipment.
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