| 摘要 |
A device for pressuring a pipe string includes a hydro-cylinder equipped in the upper section with a mechanism for displacement of the piston. The hydro-cylinder and the mechanism of piston displacement are arranged as a differential system of hydro-cylinders where the upper hydro-cylinder through two branches is connected to the control hydro-system, and the piston through the rod is connected to the piston of the lower hydro-cylinder to which in sequence through the branch slugging tank, shutoff element, suction and pressure valves are connected, those are connected to the first outlet of the lower section of the shutoff hydro-cylinder, and to manometer and pressure tube placed in the cavity of the pipe string. On the lower section of the shutoff hydro-cylinder conical threading is provided, this is connected to the pipe string with the cavity of that one, through the second outlet of the shutoff hydro-cylinder, shutoff valve and valve connected through the third outlet to the cavity of the shutoff hydro-cylinder where the piston and the spring are placed. The fourth outlet of the shutoff hydro-cylinder and the outlet of the differential hydro-cylinder are connected to atmosphere, and at the lower section of the pipe string a gate is installed. |
