| 摘要 |
FIELD: gas and oil production. ^ SUBSTANCE: in cylinder boring of press-on reel there is installed packing unit consisting of support ring, of self-packing rubber collar in form of non-split ring, of press-on ring with internal conic surface, of split ring with external conic surface conjugated with internal profile of press-on ring, of pinch ring and of bearing sleeve. Flange connection of the press-on reel and split flange are pulled together due to interaction of conic surfaces of the press-on ring and split ring. The split ring is deformed till elimination of process gap between its internal surface and surface of a casing. ^ EFFECT: reliable head sealing with string due to elimination of extrusion and destruction of sealing element from sealing unit under pressure of well fluid. ^ 7 dwg |
