DOWNHOLE HYDRAULIC MOTOR SUPPORT BEARING Russian patent published in 2004 - IPC

FIELD: drilling machinery.

SUBSTANCE: invention relates to sliding bearings of supports of downhole hydraulic motors. Proposed bearing contains cylindrical housing with support surfaces. Housing is made split, consisting of two outer cases with spaces and is furnished with inner solid case provided with support step and shells-sectors. Inner and outer cases form in assembly two ring spaces accommodating shells-sectors, preferably three shells-sectors in each space. Said shells -sectors are made of bearing cast or carbon-ceramic alloys based on aluminum oxide, and cases are made of stainless steel. Support step of inner case is located opposite to split of two outer cases.

EFFECT: provision of radial-thrust bearing of simple and reliable design featuring wear resistance and capable of operating at high abnormal temperatures, with low coefficient of friction of rubbing surfaces.

4 cl, 1 dwg