DEVICE FOR CLEANING OF WELL Russian patent published in 2010 - IPC E21B31/18 

FIELD: oil-and-gas production.

SUBSTANCE: device contains sub with inner pass channel in which in initial position is installed with ability of movement upward travelling valve, fixed in initial position. In the first version of implementation of device in the bottom nondetachable or detachable part of sub is stationary connected bell guide. Top part of funnel is connected to bottom part of sub or with receiving hollow lengthener or with flushing pipe with ability of passing through it item or is connected to sub. Bottom end of bell guide is implemented with opening by helical curve and with cone face at internal surface or in the form of "stylus" etc. According to another version of implementation of device with bottom part of sub is connected driving casing, in which it is installed with ability of limited lengthwise movement hollow draw bar, in top part of which it is implemented cylindrical thrust journal with ability of interaction with movable valve.

EFFECT: increased purification efficiency of extracted pipes, reliability of capture of extracted pipes, provided destroying of tight sludge and its capture.

37 cl, 31 dwg