Atlas Copco Secoroc Ab

Epiroc Rock Drills Aktiebolag

Epiroc Drilling Tools Aktiebolag

Göran Stenberg

Jimmy Carlsson

Mattias Göthberg

Samuel Enblom

Alexander Beronius

Mattias Rehnström

Johan Wessberg

Henrik Sundberg

Erik Rosendal

Mattias GÖTHBERG

A method for estimating wear of a drill bit in percussive rock drilling. A percussion device is configured for generating shock waves in a drill bit for breaking rock. The method includes, during drilling determining a percussion frequency of the percussion device; and estimating wear of the drill bit based on the determined percussion frequency of the percussion device and a model representation of the wear of the drill bit as a function of percussion frequency, wherein the model representation is configured to output the estimated wear of the drill bit utilizing the determined percussion frequency as input signal.

Method and system for estimating wear of a drill bit

The present disclosure relates generally to the field of drill tool identification. More particularly, it relates to a drill tool and a system configured for such drill tool identification. The drill tool includes a machined marking on a perimeter surface, wherein the machined marking is positioned on a segment of the perimeter surface and includes a matrix of indentations having predetermined column and row positions to convey an identity of the drill tool, and wherein the machined marking is optically readable from a plurality of single directions when mounted in a drill rig.

Drill tool and system for drill tool identification

A hard metal insert for a drill bit for percussion drilling. A wear part includes a cap including a wear surface. A mount includes a cylindrical part having a cross-sectional area and a diameter. The cap includes a front part with an extension along an axis of symmetry of the insert from a first point on the wear surface to a second point in the cap. The front part includes a volume between a first plane intersecting the axis at the first point and a second plane intersecting the axis at the second point. The volume is &#x2267;0.6 times a cross-sectional area of the front part in the second plane times a distance along the axis between the first and second points. A diameter of the front part in the second plane is &#x2267;0.5 times the mount diameter and &#x2266;0.6 times the mount diameter.

Hard metal insert for a drill bit for percussion drilling and method for grinding a hard metal insert

Drill bit () for a rock drilling tool (), and a method of increasing the toughness of the drill bit, which drill bit () has a drilling surface () that contacts rock during drilling. A longitudinal cross section () of the drill bit () through the drilling surface () exhibits certain relationships of Ltot(depth)/Ltot(5.0) and H(depth)/H(5.0) at the specified depths, along the drill bit's longitudinal axial center line (C) if the drill bit has a length (L) of 10 mm or greater, and Ltot(depth)/Ltot(3.5) and H(depth)/H(3.5) at the specified depths, if the drill bit has a length (L) of 10 mm or less.

Drill bit for a rock drilling tool with increased toughness and method for increasing the toughness of such drill bits

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

Drill bit () for a rock drilling tool (), which drill bit () has a drilling surface () that contacts rock during drilling. A longitudinal cross section () of the drill bit () through the drilling surface () exhibits the following relationships of Ltot(depth)/Ltot(5.0) and H(depth)/H(5.0) at the specied depths, where H(depth)/H(5.0) is measured according to a Vickers test and Ltot(depth)/Ltot(5.0) is measured according to the Palmqvist method, described in this document substantially along the drill bit's longitudinal axial center line (C): (table (I)). If the drill bit () has en length (L) of 10 mm or greater, and a longitudinal cross section () of the drill bit () through the drilling surface () exhibits the following relationships of Ltot(depth)/Ltot(3.5) and H(depth)/H(3.5) at the specified depths, where H(depth)/H(3.5) is measured according to a Vickers test and Ltot(depth)/Ltot(3.5) is measured according to the Palmqvist method described in this document, substantially along the drill bit's longitudinal axial center line (C): (table (II)). If the drill bit () has en length (L) less than 10 mm.

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Fagersta, Sweden

Göran Stenberg