DRILLING MACHINE Russian patent published in 2006 - IPC E21B3/00 E21B17/20 

FIELD: mining industry, namely, engineering of devices for drilling wells of small diameter.

SUBSTANCE: in accordance to invention drilling machine includes hydro-post, feeding unit and flexible shaft rotation unit, aforementioned shaft consisting of bushings with toothed ends, connected by cable to spherical mating joints in places of connection of their ends, bushings of flexible well are connected to spacers, in axial apertures of which coaxially to them on the cable anti-friction bushings are positioned, spring-loaded relatively to one another, with thickenings of semi-spherical shape at ends, while spherical mating joint is made in form of spherical part, inside which adjacent ends of anti-friction bushings are positioned with possible relative movement and angular rotation, and which is enveloped from outside by semi-spherical bushings, coaxially positioned on anti-friction bushings and interacting with ends of spacers via springs, while diameter of bushings is made greater than diameter of spacers with forming of circular shelves of flexible shaft for interaction with elements of feeding unit, while on external surface of bushings of flexible shaft sector depressions are made, while feeding unit is made in form of conveyers with supports, on which elements for interaction with flexible shaft and its circular shelves are mounted in form of rollers and cams, and rotation assembly containing a gear with axial aperture, through which flexible shaft passes, has coaxial bushing additionally connected to gear, with radial apertures made in several rows, in which cams are mounted for interaction with sector depressions of flexible shaft during rotation of gear.

EFFECT: increased productiveness of drilling due to provision of continuous feeding of drilling tool to well face by drilling machine.

7 dwg