초록 ▼

A downhole tool bearing assembly is provided which utilizes a secondary annular threaded locknut and a compression ring in order to take up tolerance stack-up and to provide supplemental preload through a bearing housing assembly, thus helping to ensure against accidental disassembly during operatio

A downhole tool bearing assembly is provided which utilizes a secondary annular threaded locknut and a compression ring in order to take up tolerance stack-up and to provide supplemental preload through a bearing housing assembly, thus helping to ensure against accidental disassembly during operation. The bearing housing assembly is comprised of a prepackaged subassembly of thrust bearings, sleeves and, optionally, “BELLEVILLE”-type disk springs which can be quickly and easily installed onto a downhole tool drive shaft or other similar apparatus by maintenance personnel having a minimum of training. The bearing housing assembly is designed such that reconfiguration involves little more than removal and reinstallation in the opposite orientation, thereby overcoming the need to reconfigure the bearing assembly one bearing at a time.

대표청구항 ▼

A bearing housing assembly to support a drive shaft of a drive train of a downhole tool comprising: a housing; a bearing assembly including stationary and rotating bearing components located within said housing; a compression sleeve in threaded engagement with said housing, such that rotation of sai

A bearing housing assembly to support a drive shaft of a drive train of a downhole tool comprising: a housing; a bearing assembly including stationary and rotating bearing components located within said housing; a compression sleeve in threaded engagement with said housing, such that rotation of said compression sleeve in a first direction causes said stationary bearing components of said bearing assembly to be compressed tightly together, thereby creating a compressive preload to ensure that said bearing components remain in contact throughout their operations; and a locknut in threaded engagement with said compression sleeve and which, in cooperation with said compression sleeve, maintains a preload through said stationary bearing components by providing an additional frictional interface capable of accepting a large torque input, thereby allowing the generation of a large mount of frictional resistance to loosening at the locknut interface.