| 摘要 |
FIELD: machine building.SUBSTANCE: group of inventions relates to the borehole ball valves, and more specifically to their seat devices, and to execution of the appropriate borehole operations with their use. System for the reservoir hydraulic fracturing contains first seat device, including at least one first hole having at least one first cross-section, and second seat device. At that the first seat device is made with possibility to receive the first body, having the first size, exceeding size of the first cross-section, at the same time is permits passage of the bodies with smaller size through at least one first hole. The second seat device is installed downstream the first seat device, and includes set of second holes, at least one of them is displaced along the axis relative the another second hole, and each of them has second cross-section. The second seat device is made with possibility to receive the group of second bodies, each of them has second size smaller the first size, after passage of these second bodies through at least one hole in the first seat device. At that each hole of group of second holes corresponds to one of the second bodies closing fluid path through the second holes during their seating on the second seat device, made with possibility to ensure the reservoir hydraulic fracturing after the second bodies seating on it.EFFECT: widening of the system functional capabilities.9 cl, 5 dwg |
