Patent ID: 9518462
Filing Date: 2016-12-13
CPC Classification: E21B,F03B

Claim Text:
1. A downhole turbine having a first end and a second end with the first end and the second end being opposite one another, the turbine comprising: a turbine body; a shaft positioned at about the center of the turbine body; a motor comprising a plurality of rotors, stators and bearings interposed between the shaft and the turbine body, the motor interposed between the first end and the second end of the turbine, the plurality of rotors and stators disposed radially about the circumference of the shaft arranged in alternating successive concentric rows, each row one below the other along a longitudinal length of the shaft, the successive rows of rotors rotatable within apertures formed by the successive rows of stators; and at least one non-conductor insulator assisting in electrically isolating the shaft and the turbine body from one another, wherein the non-conductor insulator is a non-conducting coating extending along an entire length interposed between the turbine body and each of the plurality of rotors, stators and bearings, or extending along an entire length interposed between the shaft and each of the plurality of rotors, stators and bearings.