ROTATABLE CUTTING BIT ASSEMBLY

A roof drill bit assembly comprising a roof drill bit (20) and a chuck (50). The roof bit contains a cavity (28) which opens at the rearward end thereof. Upon assembly the bit (20) and the chuck (50), the cavity (28) receives the axially forward end of the chuck. A sealing member is between the roof...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	SHEIRER, DANIEL, C
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Beschreibung
Zusammenfassung:	A roof drill bit assembly comprising a roof drill bit (20) and a chuck (50). The roof bit contains a cavity (28) which opens at the rearward end thereof. Upon assembly the bit (20) and the chuck (50), the cavity (28) receives the axially forward end of the chuck. A sealing member is between the roof drill bit (20) and the chuck (50) so as to provide a fluid-tight connection between the chuck (50) and the roof bit (20). Un ensemble outil de forage pour toit de tunnel comprend un outil de forage (20) et un mandrin (50). Le foret comporte une cavité (28) qui s'ouvre au niveau de son extrémité arrière. Lors de l'assemblage du foret (20) et du mandrin (50), la cavité (28) reçoit l'extrémité avant axiale du mandrin. Un élément d'étanchéité est placé entre l'outil de forage (20) et le mandrin (50) de façon à former un raccord étanche au fluide entre le mandrin (50) et le foret (20).