FIELD: oil and gas industry.
SUBSTANCE: device includes a patch in the form of a smooth metal tube having elastic sealing rings on the ends and expanding a mandrel made in the form of several rigidly fixed, after each other, on the common rod, a variety of truncated cones. The diameter of the base of each subsequent cone is greater than the previous one. The distance between neighbouring cones is changed by changing the spacer.
EFFECT: axial force is increased when the patch is expanded, and the reliability and efficiency of the device are increased.
2 dwg
