| 摘要 |
FIELD: machine building. ^ SUBSTANCE: invention is intended for performance of works in pipeline, such as displacement of well tools, for performance of swabbing. Pushed plug comprises elastic main part and elastic jacket, which has water resistant external surface that envelopes elastic main part, which differs by the fact that elastic jacket comprises tube with the first and second end parts, tube is equipped with slots, which are arranged in accordance with repeated template, these slots are closed at least at one end, where repeated template comprises at least two slots, the first slot is closed on one end part of tube and is opened on the second end part of tube, and the second slot is closed on the second end part of tube and is opened at the first end part of tube, at that the first slot and the second slot overlap each other in longitudinal direction of tube. ^ EFFECT: design simplification. ^ 4 cl, 4 dwg |
