FIELD: oil and gas industry.
SUBSTANCE: group of inventions relates to devices for releasing stuck downhole equipment. Device comprises a laser tool configured to make its inner diameter greater than the outer diameter of the downhole equipment, and a working string configured to make its inner diameter larger than the outer diameter of the downhole equipment. Laser tool comprises means for generating a collimated laser beam of annular shape and is installed on a working column, made with possibility of its lowering around downhole equipment to position in which laser tool is located near obstacle for downhole equipment. Laser tool is configured to emit a collimated laser beam of annular shape for cleaning of annular space between downhole equipment and wall of well shaft for release of downhole equipment.
EFFECT: efficient and reliable release and withdrawal of downhole equipment, downhole equipment damage prevention.
12 cl, 8 dwg
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