| 摘要 |
FIELD: oil production industry, particularly sealing or packing boreholes or wells. ^ SUBSTANCE: reel has base made as drum with flanges and sealing bush of resilient material having grooves made on inner surface thereof. One flange is adapted to connect thereof with wellhead fittings. Reel also has spacing bush inserted in the drum and supported by inner rim thereof and controllable hydraulic connection for hydraulic drive. Spacing bush is provided with flange. Another flange of the drum is attached to spacing bush flange through threaded pin and nut connections. Outer surface of sealing bush has odd number of grooves. Inner surface of sealing bush has even number of grooves. To provide controllable communication between hydraulic drive and central groove of sealing bush connection pipe is installed in reel wall. ^ EFFECT: extended operational capabilities. ^ 1 dwg |
