DRILLING UNIT Russian patent published in 2018 - IPC E21B21/00 

FIELD: drilling of soil or rock.

SUBSTANCE: invention relates to the field of drilling wells in a ground with washing and can be used to create wells for abstracting and raising groundwater from aquifers, as well as wells for foundations. Device comprises a casing, a collector for accepting drill cuttings, and a reservoir for rinsing liquid in the form of containers open from above, connected with each other through the locking device, hydraulic compressor. Collector for receiving the drill cuttings through the bottom hole in it is connected to the casing, in which, coaxially with a clearance set the drill rod in the form of a set of identical tubular sections, the first of which fixed a drill bit with a through center hole. Drill rod is connected to the drive, providing its rotational motion and translational movement along the central axis. Between the drill rod and the drive there is a swivel with a lateral hole for supplying the washing liquid. Assembly, formed by the drive and swivel, is equipped with reinforcing elements. Hydraulic compressor through its outlet through the locking device is connected with the side opening of the swivel. Reservoir for the washing liquid has a side opening, connected with the inlet of the hydraulic compressor, and an additional lateral hole connected through the locking device to the output of the hydraulic compressor.

EFFECT: due to the continuous circulation of the drilling fluid in the rig system during the drill rod extension process, the time of completion of a full cycle of drilling a well is shortened and the service life of the rig equipment is increased, thereby increasing its technical and operational performance.

4 cl, 1 dwg