Patent ID: 7762320

Claim:
A bearing assembly cooling system, comprising: a bearing assembly including an outer barrel having a central bore extending between upper and lower end portions thereof, an inner barrel at least partially disposed within the central bore of the outer barrel and bearings coupled between said barrels for providing concentric alignment of said barrels and allowing rotation therebetween, wherein an exterior surface of the outer barrel is configured for being engaged with a mating interior surface of a rotating control device housing and for being engaged by a bearing assembly retaining apparatus operably coupled to the rotating control device housing, wherein a stripper rubber attachment structure is integral with the lower end portion of the inner barrel, wherein the bearing assembly includes a lubricant flow path configured for allowing lubricant to be circulated through said bearings, wherein the lubricant flow path includes a first lubricant channel that extends within an outer barrel of the barrel assembly and a second lubricant channel defined between the outer barrel and an inner barrel of the bearing assembly, said bearings are exposed within the second lubricant channel defined between the outer barrel and the inner barrel, wherein said lubricant channels intersect, wherein the outer barrel is generally cylindrical shaped and includes a bearing assembly retention groove within an exterior surface thereof, wherein the bearing assembly retention groove extends partially around a circumference of the outer barrel such that the groove terminates at a key portion extending across the bearing, assembly retention groove, and wherein the first lubricant channel within the outer barrel is substantially straight and extends through the key portion; a heat exchanger having a lubricant core portion and a coolant core portion, wherein said core portions are jointly configured for allowing heat transfer between respective fluids of said core portions; a coolant flow circuit apparatus coupled to the coolant core portion; wherein the coolant flow circuit apparatus is configured for circulating coolant through the coolant core portion; and a lubricant flow circuit apparatus coupled to the lubricant core portion and to the lubricant flow path, wherein the lubricant flow circuit apparatus is configured for circulating lubricant through the lubricant core portion and the lubricant flow path.