FIELD: oil-and-gas industry.
SUBSTANCE: invention related to equipment, used in oil-and-gas industry for producing formations opening by forming holes in wells casing tube walls and creation of long perforation channels in it. Cased well perforation device includes guide vane assembly, casing tube and producing formation perforation tool 1, executed as a flexible shaft 2, pusher for its displacement and cutting edge. On the flexible shaft surface 2 located a screw winding, made of at least 2 parallel fibers 3 and 4 of a long-measuring material with round cross section, their surfaces contacts with each other. At that at least one of the fibers executed with cross section area smaller than other ones.
EFFECT: reliability of sludge withdrawal from drilling zone, operation reliability and operation lifetime increase.
2 dwg
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