GEAR BOX INSERT OF BOTTOM HOLE DRILLING ENGINE Russian patent published in 1995 - IPC

FIELD: mining. SUBSTANCE: bottom hole drilling engine gear box insert has body, located in oil filled chamber transmission, driving and driven shafts with mounted on them radial and spherical supports, set between each radial and spherical supports gaskets and canal for cleansing liquid. Insert is provided with additional gasket, located on driving shaft between spherical support and transmission; with semi-couplings, mounted on input end of driving shaft and output end of driven shaft; and shifters, located between gear box insert body and bodies of adjacent sections of engine. Transmission is made in the form of two-step planetary transmission with ball connection, central link of first step of which is connected with driving shaft, and second step carrier with driven shaft. Canal for cleansing liquid is formed by axial holes, made in driving and driven shafts and carrier planetary transmission, and mounted between them gaskets. Insert is provided with thrust bearings, on which planetary transmission carrier and driven shaft are mounted in the body. EFFECT: gear box insert of bottom hole drilling engine is used in bottom hole drilling engines for oil and gas bore holes drilling. 1 dwg