Atlas Copco Secoroc Ab

Epiroc Drilling Tools Aktiebolag

Alexander Beronius

Sverker Hartwig

Göran Stenberg

Jimmy Carlsson

Leif Nordfeldt

Mattias Göthberg

Samuel Enblom

James Jing Yao

Thomas ÖSterholm

Mattias GÖTHBERG

A device in a drill string component for percussive rock drilling including a thread for threading together with another drill string component including a complementary thread. The thread includes a thread groove formed by two thread flanks and an intermediate thread bottom. In operation one of the flanks forms a pressure flank. The thread groove has an essentially equally shaped sectional form along its axial extension. The thread bottom exhibits at least three surface portions with part-circular shape, as seen in an axial section. The surface portions with part-circular shape have increasing radiuses, as seen from each thread flank to an intermediate surface portion of the thread bottom. Also a thread joint and a drill string component.

Thread device, thread joint and drill string component for percussive rock drilling

Rock drilling equipment and drill string components () for top hammer drilling and down-the-hole drilling for positioning between a drill rig and a drill bit include a pipe-shaped element (), which is arranged for transferring only rotational movements from the drill rig to the drill hit. A vibration-damping structure () is arranged adjoining to at least a part of an inside () of the pipe-shaped element in a space () formed inwardly of the inside ().

Drill string component for noise control during percussion drilling

Growing community of inventors

Fagersta, Sweden

Alexander Beronius