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Publication numberUST102901 I4
Publication typeGrant
Application numberUS 06/298,271
Publication dateApr 5, 1983
Filing dateAug 31, 1981
Priority dateAug 31, 1981
Publication number06298271, 298271, US T102901 I4, US T102901I4, US-I4-T102901, UST102901 I4, UST102901I4
InventorsLarry A. Offenbacher
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Method of fabricating a bearing
US T102901 I4
The mating halves 7 and 11 of a new type of thrust bearing for a down hole drilling motor 1 are fabricated by a technique which ensures that the composite diamond compact inserts 9 or 13 are coplanar with each other. Composite compacts are utilized having a chamfer on both the diamond table 18 and the substrate 19. These hard inserts are inserted into recesses 17 in steel bearing body rings 8 or 12, said recesses being the same depth as the substrate. The composite compacts are furnace brazed below the degradation temperature of the diamond. During brazing a weight is placed on the compacts to maintain their coplanar relationship. The space between the inserts 15 is maintained at less than half their diameter. This fabrication technique results in a smooth running, low friction thrust bearing for rotating equipment.
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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5037212 *Nov 29, 1990Aug 6, 1991Smith International, Inc.Bearing structure for downhole motors
US5480233 *Oct 14, 1994Jan 2, 1996Cunningham; James K.Thrust bearing for use in downhole drilling systems
US6190050Jun 22, 1999Feb 20, 2001Camco International, Inc.System and method for preparing wear-resistant bearing surfaces
U.S. Classification29/898.041, 384/907, 384/95
International ClassificationB23P15/00, F16C17/04, E21B4/00
Cooperative ClassificationF16C17/04, Y10S384/907, B23P15/003, E21B4/003
European ClassificationB23P15/00C, F16C17/04, E21B4/00B