FIELD: oil and gas industry.
SUBSTANCE: invention may be used for opening productive oil and gas beds in cased wells. Proposed method comprises running-in of tubing by means of deflecting-clamping device, locking the latter in preset interval, running-in of cutting tool inside tubing on flexible shaft end, and drilling perforation channel by revolving flexible shaft and driving it axially. In compliance with this invention, running-of said tool with flexible shaft is carried pout by gravity of tool and geophysical cable. Displacement of cutting tool over bed is registered by magnetic marks arranged in guiding-clamping device. Drilling is carried out by revolving cutting tool by feeding process fluid to hydraulic motor and loading said tool axially by feeding geophysical cable. Unloading is performed by means of geophysical winch drive.
EFFECT: higher efficiency and reliability.
1 dwg
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