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1. EP2373867 - ENGINEERED BEARING SURFACE FOR ROCK DRILLING BIT

Office European Patent Office
Application Number 09837032
Application Date 23.12.2009
Publication Number 2373867
Publication Date 12.10.2011
Publication Kind A2
IPC
E FIXED CONSTRUCTIONS
21
EARTH OR ROCK DRILLING; MINING
B
EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
10
Drill bits
08
Roller bits
22
characterised by bearing, lubrication or sealing details
C CHEMISTRY; METALLURGY
09
DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
D
COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
163
Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
C CHEMISTRY; METALLURGY
09
DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
D
COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
175
Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
04
Polyurethanes
E21B 10/22
C09D 163/00
C09D 175/04
CPC
E21B 10/22
Y10T 29/49986
Applicants BAKER HUGHES INC
Inventors LIN CHIH
DICK AARON J
Priority Data 141433 P null
US20080141433P null
US2009069373 null
WO2009US69373 null
14143308 30.12.2008 US
2009069373 23.12.2009 US
Title
(DE) MANIPULIERTE LAGERFLÄCHE FÜR GESTEINSBOHRMEISSEL
(EN) ENGINEERED BEARING SURFACE FOR ROCK DRILLING BIT
(FR) SURFACE ELABOREE DE PALIER POUR TREPAN POUR ROCHE
Abstract
(EN)
A drill bit bearing having a treated surface and method for preparing the same is provided. The method includes the steps of polishing at least one contacting surface of the bearing with an abrasive paste to a finish of less than about 10 μin Ra. The surface of the polishing instrument has a coating that includes a mixture of an epoxy cement and a polymer.

(FR)
L'invention porte sur un palier pour trépan comportant une surface traitée et sur un procédé pour sa préparation. Le procédé comprend les étapes de polissage d'au moins une surface de contact du palier au moyen d'une pâte abrasive afin d'obtenir un fini de moins qu'environ 250 micromètres. La surface de l'instrument de polissage comporte un revêtement comprenant un mélange d'un ciment époxy et d'un polymère.

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