Keilausrichtung für Dth-Hammeranordnung

Details

Veröffentlichungs-Nr.

EP4800216

Anmeldetag

18. Juni 2024

Veröffentlichung

2. September 2026

Rechtsraum

EP

IPC

E21B17/07

Abstract

A hammer drill assembly for coupling to a drill string having a drill bit positioned at the forward end having a drill head and a bit shaft; wherein a plurality of axially extending bit splines project radially outwards from a radially outward facing surface of the bit shaft; wherein each of the bit splines comprises a bit spline tip at its axially rearward end having a rearward axially outer edge and a central bit spline longitudinal axis; and a driver sub provided axially rearward of the drill bit comprising a plurality of axially extending driver sub splines projecting radially inwards from an inward facing surface of the driver sub; characterised in that: the rearward axially outer edge on at least of one of bit spline tips is non-perpendicular to the bit spline longitudinal axis along at least 25% of the width of the bit spline tip.

Anmelder

Firma

Sandvik Mining and Construction Oy

Land

🇫🇮 Finnland

Fachgebiete