WEDGE-SHAPED DIVERTER Russian patent published in 2010 - IPC E21B7/08 

FIELD: oil and gas industry.

SUBSTANCE: diverter consists of guide wedge with working surface and support assembly. The latter includes support element with inclined surfaces converging downwards towards diverter axis. Support element is connected to lower part of wedge and equipped with central channel interconnected with hydraulic chamber which is hollow and equipped from below with orifice hole. At that, hydraulic chamber is connected to cavity of drill pipes by means of high pressure hose. Support element has from below an external cylindrical surface on which there rigidly arranged is piston and which is enveloped with cylinder with possibility of upward longitudinal movement along it. Piston cavity of cylinder is interconnected with central channel. Housing is made in the form of hollow movable sleeve rested from below on cylinder and spring-loaded from above from the support element. Housing includes openings for screwing dies which are made in the form of rollers.

EFFECT: improving reliability level of installation and attachment of the device in the well, possibility of achieving material economy, energy saving, labour input economy and saving of time during well construction with multiple use of one set of wedge-shaped diverter, possibility of simultaneous production from the main and additional well bores.

4 dwg