SWIVEL FOR DRILLING RIG Russian patent published in 2021 - IPC E21B21/02 

FIELD: soil or rock drilling.

SUBSTANCE: invention relates to swivels for drilling rigs and can be used in small-size devices for drilling in soil with flushing of wells, intended for intake and lifting of ground water from water-bearing horizons, as well as wells for engineering utilities laying in them. Device comprises housing, shaft with first and second ends, sealing cups, rolling bearings, two mounting bushings with covers. Housing is made with inner cavity and equipped with side hole with branch pipe for supply of flushing fluid. Shaft has radial and axial holes intersecting each other. Axial hole is made blind on the shaft first end. Shaft is installed in inner cavity of housing with possibility of axial rotation by means of rolling bearings. Sealing cups are installed in clearance between shaft and housing so that space is limited in inner cavity of housing, in which there are inputs to radial hole of shaft and into hole with branch pipe. Seat bushings are located outside the housing, adjoin its opposite ends and are fixed to each other by means of a rigid detachable connection, and rolling bearings are located inside the seating bushings and pressed into them by covers. Swivel for drilling rig is configured to connect the first end of the shaft with the drive, and the second end of the shaft is connected to the drill rod.

EFFECT: higher repairability and working life, improved operational and technical indices.

6 cl, 1 dwg