INSTALLATION METHOD OF PROFILE OVERLAPPING DEVICE IN WELL Russian patent published in 2010 - IPC E21B29/10 

FIELD: oil-and-gas production.

SUBSTANCE: method includes sequential pressure-tight joint of sections of shaped tube to each other and run into well. It is located in steady rocks top and bottom spigot points of profiled overlapping device, outfitted correspondingly hermetic installed inside with ability of disconnection to sub with pass connected at the top with pipe string and bottom with pass straightening by pressure and mechanical extension of cylindrical sections up to pressure to walls of well at movement of sub upwards and downwards and detaching of bottom from overlapping device with following extension of bottom end. Before movement downwards sub is lifted up for extension of top cylindrical point. Before movement upwards it is created excessive interim pressure in pipe string and sub, additionally outfitted at the top projected from pressure tinted boxes which extending into work position, it is sealed by perimetre inner space of overlapping device, During movement of sub upwards in pipe string is not removed excessive pressure up to outlet of tinted box from overlapping device after that it is implemented detaching of bottom.

EFFECT: increased quality and reliability of installation of overlapping devices.

2 cl, 2 dwg