| 摘要 |
FIELD: mining.SUBSTANCE: group of inventions relates to mining and can be used in a downhole tool for inconsistent opening and closing of windows. Downhole tool includes a tubular item, which includes a window. First ball controlled mechanism including the first lock axially displacing inside the tubular item from the first position closing the window to the second position opening the window. First ball seat moving with the first lock and the second ball controlled mechanism including the second lock axially displacing inside the tubular item from the first position opening the window to the second position closing the window. Second ball seat moving with the second lock, herewith a hole of the first ball seat is less than a hole of the second ball seat. Invention also includes a method of opening and closing the window in a bottomhole tubular item and a method of operation at the bottomhole in an incoherent order using a system of valves with a safety joint having multiple downhole tools.EFFECT: technical result is enabling inconsistent opening and closing of windows in a horizontal wellbore.19 cl, 11 dwg |
