Rock Drilling Tools
- Bit diameter range: 90-400mm
- Thread connection: REMET, METZKE, API REG
- Face design: center-drop face, concave face
- Button types: domed button, semi-ballistic button, ballistic button, pointed button, flat button
- Reverse circulation connection adapters are primarily used to connect the drilling rig to drill pipes, drill pipes to RC hammers, and to interface drill strings with different thread types. They play a critical role within the RC drilling system.
- Designed with a dual-arm structure, fully compliant with the functional requirements of reverse circulation drilling systems, serving as a key linkage between all RC components.
- Manufactured from high-quality low-carbon alloy steel and treated with optimized heat treatment processes, significantly enhancing overall strength and torsional resistance.
The adapter effectively distributes torsional loads across connected components, which is the fundamental reason transition subs are essential, even when identical thread types are used, particularly between the drilling rig and drill pipes, as well as between drill pipes and RC hammers.
| Thread (pin) | Thread (box) | Diameter, mm | Length, mm | Inner tube to end, mm | Inner tube sealing face size, mm | ||
| D | L | L1 | L2 | D1 | D2 | ||
| REMET 3.5'' | REMET 4.0'' | 102 | 225 | 35 | 9 | 57.2 | 49.5 |
| REMET 3.5'' | METZKE 4.0'' | 102 | 225 | 25.4 | 9 | 54 | 49.5 |
| METZKE 4.0'' | REMET 4.0'' | 102 | 204 | 35 | 3.1 | 57.2 | 54 |
| REMET 4.0'' | METZKE 4.0'' | 102 | 204 | 25.4 | 7.5 | 54 | 57.2 |
| METZKE 4.0'' | METZKE 4.5'' | 114 | 188 | 48.2 | 3.1 | 57.2 | 54 |
| METZKE 4.0'' | REMET 4.5'' | 116 | 200 | 31.5 | 3.1 | 63.5 | 54 |
| REMET 4.0'' | METZKE 4.5'' | 114 | 208 | 48.2 | 7.5 | 57.2 | 57.2 |
| REMET 4.0'' | REMET 4.5'' | 116 | 220 | 31.5 | 7.5 | 63.5 | 57.2 |
| METZKE 4.5'' | REMET 4.5'' | 116 | 250 | 31.5 | 0 | 63.5 | 67.4 |
| REMET 4.5'' | METZKE 4.5'' | 116 | 220 | 48.2 | 6.5 | 57.2 | 63.5 |
- Machined from premium 42CrMo alloy steel and processed with proven heat treatment technology, delivering significantly improved tensile strength and torque resistance.
- Customization available, including length, thread types, as well as color and logo branding.
When adjacent components use different thread types, a reverse circulation adapter is essential to ensure full mechanical and internal passage continuity throughout the RC drilling system.
Absolutely. Although the adapter functions as a connecting component, any quality failure can lead to severe drilling accidents. In deep RC drilling operations, adapter failure may result in the entire drill string being lost in the borehole, making recovery extremely difficult, time-consuming, and costly.