DUAL STRING TUBING HANGER Russian patent published in 2009 - IPC E21B33/03 

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to oil-and-gas industry, particularly to wellhead equipment with simultaneous separate exploitation of oil and gas wells. The dual string tubing hanger is a shut-off distribution unit, which consists of three discs joined by a threaded joint, where there are openings in the bottom and top discs, coaxial with channels of the tubing hanger of the first row of tubes. In the middle disc there are openings with diametre which is greater than the diametre of openings in the bottom and top discs and eccentric with them, into which are fitted disc shaped shutters with bypass openings, which coincide with openings in the bottom and top discs when the shutters are in open position. There are toothed sectors on the shutters, which interact with the gear shaft of the actuating mechanism, which rests on bearings, one of which is in the bottom disc and the other in the top disc, with a shank which juts out above the top surface of the top disc. Tubes of flow lines are joined to the thread, made on each opening of the top disc. Operating mode of the well can be regulated by opening either the first or second flow lines successively or both lines at the same time.

EFFECT: wider functional capabilities of the wellhead equipment.

1 cl, 2 dwg