Arrangement for exchanging drill bits

Details Arrangement for exchanging drill bits Arrangement for exchanging drill bits

1974-12-16

1976-08-31

Leppink, James A.

Boring or penetrating the earth

With orienting or racking means for unconnected tools or...

175122, 175135, 175203, E21B 1914, E21B 302

Patent

active

039774805

ABSTRACT:
In a drill rig, a device for exchanging a drill bit is mounted on a feed bar and is arranged movably to and from the drill axis. The bit exchanging device comprises means for holding a bit being brought thereinto non-rotatively during rotation of the drill string. Furthermore, there are means for providing an anvil to the bit when delivering impacts against the drill string.

REFERENCES:
patent: 2781185 (1957-02-01), Robbins
patent: 3194313 (1965-07-01), Fanshawe
patent: 3336991 (1967-08-01), Klein et al.
patent: 3734208 (1973-05-01), Otto
patent: 3833072 (1974-09-01), Back

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