FIELD: gas and oil production.
SUBSTANCE: procedure consists in lowering device in assembly with patch on tool into well, in orientation of patch on defect, in creation of excess hydraulic pressure in system with fixation of patch relative to breach, in expansion of patch with tool facilitating progressive motion of mandrel head downward and rotation of above located roller head. A mechanism converting rotary motion of the roller head into reciprocal lengthwise motion of the mandrel head is installed before lowering into a well. At expansion of the patch the tool is continuously transferred downward.
EFFECT: saving material, power and financial resources, expanded range of well repair along total length of casing string.
2 dwg
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