METHOD OF INSTALLING SECTION-SHAPED OVERLAPPING DEVICE IN WELL Russian patent published in 2009 - IPC E21B29/10 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil and gas industry, and namely to methods of insulating troublesome zones when sinking wells and repairing casing pipes with overlapping devices made from shaped tubes. Method includes connection of sections of shaped tubes, their lowering into the well, smoothing with pressure and firm adherence to the well walls. Overlapping device is lowered into the well with the well shaft being washed through internal channels of the overlapping device due to the fact that original shape of profiled tube cavities is attached with fixtures. Lower part of the overlapping device is equipped with a calibration orifice. Pressure used for smoothing the shaped tubes with fixture breaking is performed due to increasing liquid flow, which is pumped through the overlapping device with calibration orifice.

EFFECT: enlarging the use under difficult conditions, simplifying installation process, and reducing costs.

2 dwg