HOUSING, MANDREL AND BEARING ASSEMBLY FOR DOWNHOLE DRILLING MOTOR

摘要

A downhole housing, mandrel and bearing assembly 100 includes a flex shaft 20 adapted to connect to a downhole motor power output 309 and a tubular mandrel 30 adapted to connect to a drill bit 370. A lower tubular housing 60 is adapted to contain a lower bearing assembly 90 and catch sleeve assembly 110. The catch assembly 110 is adapted to retain the mandrel 30 in the lower housing if the mandrel breaks. An upper tubular housing 70 contains an upper bearing assembly 80 and is adapted to connect to a housing 302 of the downhole motor 301. A method of assembling the downhole housing, mandrel and bearing assembly 100 is disclosed.