Search International and National Patent Collections

1. (WO2003076761) DRILL MEMBER FOR ROCK DRILLING AND A METHOD FOR MANUFACTURING THE DRILL MEMBER

Pub. No.:    WO/2003/076761    International Application No.:    PCT/SE2003/000361
Publication Date: Sep 18, 2003 International Filing Date: Mar 5, 2003
IPC: E21B 17/042
Applicants: SANDVIK AB
LINDEN, Johan
Inventors: LINDEN, Johan
Title: DRILL MEMBER FOR ROCK DRILLING AND A METHOD FOR MANUFACTURING THE DRILL MEMBER
Abstract:
According to the present invention a thread joint of steel for percussive drilling is provided where flushing water is used, comprising at least one external thread (14) as well as an internal thread (12). The thread (16) comprises thread flanks (21,22) and thread bottoms (23) and thread crests (24) provided between flanks. Said members (19) consist of at least two different materials. The member is performed in a composite component (15). The thread bottoms (23) and the thread crests (24) consist of low alloyed steel. The invention further relates to a method for manufacturing the drill member.