ELECTRIC GENERATOR FOR REMOTE SENSING SYSTEM Russian patent published in 2005 - IPC

FIELD: well drilling, particularly to supply power to bottomhole instruments and to communication link transmitter during drilling operation.

SUBSTANCE: electric generator has outer rotor and stator made as an axle and cavity defined in-between. The cavity is filled with liquid lubricant. At least one turbine house is installed on the stator by means of front and rear bearings. Ring made of abrasive wear-resistant material is installed on rear end of outer rotor. Sealing means is arranged on axle end so that end thereof rests upon the ring made of abrasive wear-resistant material and installed on rear rotor end. Ball for axial load reaction is installed between inner turbine house part and front axle end. Liquid lubricant refilling device is also provided. Axle end and/or inner part of turbine body may be guided by replaceable bushes. Replaceable bushes may have inner conical groove and connection thread. One adjusting washer may be installed under one bush. Refilling device may be formed as channel made in front turbine house provided with plug and check valve.

EFFECT: increased operational reliability.

5 cl, 2 dwg