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Machine translation
1. (WO1980002037) ROTARY DRILL BIT
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/002037    International Application No.:    PCT/SE1980/000079
Publication Date: 02.10.1980 International Filing Date: 14.03.1980
IPC:
E21B 10/22 (2006.01), F16C 33/78 (2006.01), F16J 15/34 (2006.01)
Applicants:
Inventors:
Priority Data:
7902763 28.03.1979 SE
Title (EN) ROTARY DRILL BIT
(FR) UN TREPAN DE FORAGE ROTATIF
Abstract: front page image
(EN)A rotary roller bit comprising at least one rotatably carried roller cutter (12) and provided with sealing means (21) for preventing impurities from entering into the bearing system (14, 15, 16) of the roller cutter. For purposes of preventing axial and wobbling movements of the roller cutter (12) relative to the bit head from creating high contact pressure at the contact surface between the sealing means (21) and the surface against which same seals the sealing means (21) is provided with an elastically yieldable tongue (25) which extends radially relative to the rotational axis of the roller cutter (12).
(FR)Un trepan a galet rotatif comprend au moins une fraise a galet montee de maniere rotative (12) et pourvue de moyens d"etancheite (21) pour empecher les impuretes d"entrer dans le systeme de palier (14, 15, 16) de la fraise a galet. Dans le but d"empecher les mouvements axiaux et d"oscillation de la fraise a galet (12) par rapport a la tete du trepan d"engendrer une pression de contact eleve sur la surface de contact entre les moyens d"etancheite (20) et la surface contre laquelle ceux-ci s"appuient, ces moyens d"etancheite (21) sont pourvus d"une languette elastique (25) qui s"etend radialement par rapport a l"axe de rotation de la fraise a galet (12).
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)