WELL PIPE FLARING DEVICE Russian patent published in 2025 - IPC E21B29/10 

FIELD: mining.

SUBSTANCE: invention relates to the field of well drilling and is intended, in particular, for expansion of shaped pipes when they are installed in a well for isolation of trouble zones. Proposed pipe flaring device comprises housing with central channel, threads for connection with downhole equipment and recesses on outer surface. In the recesses there are rollers installed on axes fixed in the upper slots and lower slots of the body recesses at an angle to the central axis. Bottom groove of housing recess is made with rectangular cross-section with bushing rigidly fixed from outside with inner conical surface. Upper groove of the housing recess is made with a rectangular cross-section with an inclined thrust plane inside and a bushing screwed on the outside on the left thread, which is fixed with screws and a retaining ring. In the central channel of the housing there is a conical piston interacting with a pusher with chamfers installed in the hole. Hole is located on the inclined thrust plane of the upper slot of the housing perpendicular to the conical surface of the piston from below and perpendicular to the lower plane of the prismatic end of the axis. Bushing with left-hand thread is made with a conical surface with a gap, which allows movement of the axis with the roller outside in the radial direction to increase the described diameter D along rollers by 1-1.5% when pressure is created above the piston and interaction of the conical piston and the pusher with the lower plane of the prismatic end axes. Conical piston is equipped with a nozzle resistant to hydroabrasive wear.

EFFECT: increased reliability of the device due to compensation of wear of rollers, elimination of jamming of the device during its extraction and erosion of the central channel of the housing due to application of a nozzle resistant to hydroabrasive wear.

1 cl, 3 dwg