WEDGE-SHAPED DIVERTER Russian patent published in 2013 - IPC E21B7/08 

FIELD: oil and gas industry.

SUBSTANCE: device includes diverting wedge with hydraulic anchor, 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. Cutting tool is equipped with transverse cylinder with process channel connected to downhole space. Shearing bolt is equipped with annular stress raiser, and releasing device is made in a form of piston mounted in cylinder of cutting tool with possibility of movement apart from the wedge - working position - and fixed by retainer in transportation position. The piston is rigidly connected to shearing bolt, note that piston cavity from shearing bolt side is connected to feeding tube and cavity of drill pipes and process channel - in working position. Retainer is capable of releasing the piston at pressure exceeding the pressure of anchor attachment in borehole and creating force sufficient enough for destructing shearing bolt and detachment of cutting tool from the wedge.

EFFECT: possibility to use the device in wells with complicated profile, increase of its operation reliability.

2 dwg