| 摘要 |
FIELD: mining.SUBSTANCE: group of inventions relates to mining industry and can be used in bottom-hole valve systems. The system includes a tubular column and a hollow activation ball. The tubular column is adapted for arrangement in a well and includes a seat. The activation ball is adapted for lowering to the well to be arranged in the seat. The ball includes an outer cover that forms a spherical surface. The outer cover forms a closed volume and is made from metallic material. The activation ball includes a supporting structure located on the inner surface of the outer cover.EFFECT: improvement of efficiency of a bottom-hole tool activation system.26 cl, 13 dwg |
