WATER INFLUX INTERVAL SHUTOFF DEVICE IN OPEN HOLE OF HORIZONTALLY-BRANCHED WELL Russian patent published in 2014 - IPC E21B33/122 

FIELD: oil and gas industry.

SUBSTANCE: water influx interval shutoff device in an open hole of horizontally-branched well comprises a tubing string with packers run in hole. From below the tubing string by a hydraulic disconnecting switch is connected to a double-packer assembly consisting of two swellable packers interconnected by an inter-packer tube, which length exceed length of water influx in the well, at the lower end of the double-packer assembly there is a perforated tube which is in its initial position is covered hermetically by a bushing from inside and fixed by a shear pin, at that at the lower tube end there is a hydraulic whipstock that ensures ingress into an open hole of the horizontally-branched well, at that in the operating position the bushing moves downwards in a limited way under action of the gating element run in at the tubing string from the wellhead until it thrusts into the butt end of the hydraulic whipstock with opening of perforated holes of the tune and fixation in the tube below its perforated holes.

EFFECT: device allows increased operational reliability due to simplified design and sealing quality of the water influx interval in process of the well operation in result of use of water- and oil-swellable packers depending on type of the liquid in the interval wherein they are set, and shutoff of water influx intervals in an open hole of the horizontally-branched well, reduced costs for installation and maintenance in process of the well operation as the device is run in to the well separately from production equipment.

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