DEVICE FOR SPUDDING OF OFFSHOOTS FROM WELL Russian patent published in 2013 - IPC E21B7/08 

FIELD: oil and gas industry.

SUBSTANCE: invention includes diverting wedge with hydraulic anchor, between which there located is a reducer, cutting tool attached to the top part of diverting wedge via shearing bolt, feeding tube for fluid supply that connects the cavity of drill pipes and cavity of cutting tool with anchor cavity. There is a movable connection between the reducer and the wedge. In the reducer there installed is a fixing assembly of diverting wedge made in a form of fixing device and piston with rod located in hydraulic cylinder. Shearing bolt is equipped with internal plugged cavity filled with explosive substance with detonating fuse, and fixing assembly piston is equipped with power supply element and fixed in transporting position by locking element that opens when pressure exceeds the pressure of assembly in anchor well. One of the outputs of detonating fuse is connected via the cable to one of the poles of power supply element, the other output - to terminal at the internal surface of hydraulic cylinder of fixing assembly. The second pole of power supply element is connected to the spring-loaded pin located at the external surface of the piston and can interact with hydraulic cylinder terminal at piston movement in hydraulic cylinder towards the wedge.

EFFECT: invention allows extending device scope, increase of its operation reliability.

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