RETRACTABLE DEFLECTOR Russian patent published in 2011 - IPC E21B7/08 

FIELD: gas-and-oil producing industry.

SUBSTANCE: wedge-deflector is connected to unit of support with sub and high pressure pipe for supply of liquid via channel of sub to working chamber formed with lengthwise-corrugated tube and cylinder rigidly coupled with sub. A spring-loaded pusher is inserted into the sub; the pusher interacts with the wedge and holds down its head to the wall of the production string. Also, in the sub there is made a radial through orifice communicated with its channel under a centraliser interacting with the wall of the production string; there is also a rod interacting with the pusher to move it upward. The unit of the support is made as the lengthwise-corrugated tube blinded from beneath; a piston blinded from beneath and rigidly coupled with the sub is installed in the cylinder. With its upper orifices the piston is communicated with the working chamber and it travels upward with pressure tightness relative to the unit of the support. The channel of the sub is communicated with the piston via a controller opening at specified pressure.

EFFECT: extended functionality of device due to deflection and holding head of wedge down to wall of producer; simplification of folding anchor of deflector into transport position and of retracting device from well.

3 dwg