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Machine translation
1. (WO1980000265) ROTARY DRILL BIT
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/000265    International Application No.:    PCT/SE1979/000145
Publication Date: 21.02.1980 International Filing Date: 29.06.1979
IPC:
E21B 10/22 (2006.01), E21B 10/24 (2006.01), F16C 37/00 (2006.01)
Applicants:
Inventors:
Priority Data:
7807708 11.07.1978 SE
Title (EN) ROTARY DRILL BIT
(FR) FORET
Abstract: front page image
(EN)A rotary drill bit comprising at least one rotatably carried roller cutter (17) and provided with passages (26, 27, 28) for supplying cooling fluid to the bearing system (11-15) of the roller cutter. For purposes of preventing the heat generated at an annular surface (31) transmitting axial forces from causing rapid bearing wear a recess (32) is provided in the annular surface (31). The recess (32) communicates with the passages (26, 27, 28) and extends entirely around the bearing shaft (l6) for allowing circulation of cooling fluid therearound.
(FR)Un foret rotatif comprenant au moins un cylindre de coupe (17) porte en rotation et pourvu de passages (26, 27, 28) pour alimenter en fluide de refroidissement les paliers d"appui (11-15) du cylindre de coupe. Pour empecher la chaleur produite au niveau d"une surface annulaire (31) transmettant des forces axiales de provoquer l"usure rapide du palier, un evidement (32) est amenage dans la surface annulaire (31). L"evidement communique avec les passages (26, 27, 28) et s"etend tout autour de l"arbre de palier (16) pour y permettre la circulation du fluide de refroidissement.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)