METHOD OF WELL CASING BY TAIL PIPE WITH BOTTOMHOLE SCREEN Russian patent published in 2017 - IPC E21B29/10 E21B33/14 

FIELD: oil and gas industry.

SUBSTANCE: tail pipe, the packers, the bottomhole screen, under which the drilling head to seal the pipe space is installed, located above the tail pipe shoe, the device for cementation, combined with the packer joint, located in the open well bore, and guiding the collar, are lowered within the necessary intervals of the well bore and the producing wells on the supporting column. The disconnector is installed on the outer surface of the tail pipe, joining the lower collar of the disconnector with the holder of the tail pipe, and the upper collar with the supporting pipes, the hold down, and it is placed in the upper section of the tail pipe, and the packer is installed under the hold down. On the upper collar of the disconnector the hanger plug is installed to provide the hermiticity at washing during the lowering and cementing the tail pipe, the densifier is installed between the upper collar and the lower collar of the disconnector, and the sphere to provide the reciprocating and crank of the lowered column during the process of the lowering in the horizontal section is installed in the inlet of well under the densifier.

EFFECT: reliability growth and providing the controllability of the operating process of well casing by the tail pipe with the bottomhole screen.

9 dwg