Product Description
Reverse circulation drill rods are essential tools used in reverse circulation drilling, commonly employed in mineral exploration and water well drilling. These rods are designed to allow the return of drill cuttings to the surface while maintaining a stable borehole. Typically made of high-strength steel, they come in various lengths and diameters to suit different drilling depths and conditions. The rods feature standardized threading for secure connections and efficient drilling operations, ensuring effective sample recovery from deep underground formations. Reverse circulation drill rods play a crucial role in collecting accurate geological samples for analysis in mining and exploration projects.
Application
Used in hole drilling works, such as mining blasting,water well drilling,geother mal well drilling,pipe roof support,coal and non-ferrous metal mining projects
Features
1.Reverse Circulation Mechanism
Cuttings travel up through the inner tube of the drill pipe, while drilling fluid (air or water) is pumped down the annulus between the inner and outer pipes.
Provides high-quality, uncontaminated samples for accurate geological analysis.
2.Dual-Wall (Double-Wall) Design
Outer Pipe: Provides structural strength and stability.
Inner Pipe: Smooth-bore tube for efficient cuttings transport.
Annulus Gap: Allows pressurized fluid to reach the bit.
3.High-Strength Materials
Made from high-grade alloy steel for durability in harsh drilling conditions.
Often wear-resistant to extend service life.
4.Threaded Connections
Precision threads (e.g., Metzke or Remet) ensure strong, leak-proof joints.
5.Compatibility with RC Hammers
Works with RC drilling hammers that use compressed air to drive the bit and lift cuttings.
Specification:
| Reverse circulation drill pipe/Double wall drill pipe/Dual Wall drill pipe |
| Outer tube O/D in | Inner tube in | Lerngth m | Type of thread | Range of dril |
| 3.5 | 1.5 | 3 ~ 6 | Remet, Metzke, Matrix, others | 4-1/8-4-3/4 |
| 4 | 2 | 3 ~ 6 | Remet, Metzke, Matrix, others | 4-3/4-5-1/2 |
| 4.5 | 2 & 2-1/2 | 3 ~ 6 | Remet, Metzke, Matrix, others | 5-1/8-6 |
| 6.625 | 3 | 3 ~ 6 | Remet, Metzke, Matrix, others | 7-7/8-15 |
| 10.75 | 5 | 3 ~ 6 | Remet, Metzke, Matrix, others | Over 15 |
Product Tags:
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4'' 6m RC Drilling Rod Thread Reverse Circulation Drilling Pipes Images
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