FIELD: oil and gas production.
SUBSTANCE: device consists of tubular collar radially expanding under effect of pumped fluid medium. The collar is rigidly connected with end elements at least one of which contains circular cylinder section facing the collar. The said cylinder section is made on half of thickness of a wall of the element forming two circular flanges. A group of through orifices is formed in the wall of the cylinder section, while material of the collar covers both external and internal sides of the said cylinder section passing through orifices and maintaining its integrity.
EFFECT: reliable connection between collar and end element avoiding unsticking or breaking.
7 cl, 10 dwg
