FIELD: machine building.
SUBSTANCE: invention relates to a completion method using a liner and an expansion suspension device for its implementation. Expansion suspension device comprises an expansion suspension cylinder and a wedge plate provided on the outer surface of the expansion suspension cylinder. Wedge plate comprises a set of wedge blocks arranged along periphery and having wedge teeth provided on their surfaces. Wedge plate also has a circulation channel formed between adjacent wedge blocks. Two peripherally adjacent wedge blocks are connected to each other by at least two elastically deformable connecting ribs. All wedge blocks are made with possibility of fixation to each other by means of fixing ring. Device also contains a safety mechanism. Safety mechanism comprises support mandrel rigidly connected to expansion mandrel inside expansion suspended cylinder. Also, the safety mechanism contains a spring coupling installed on a support mandrel through a bearing. And also the safety mechanism contains unscrewing connector mounted on support mandrel. Unscrewing connector is made with possibility of sliding in axial direction along support mandrel and rotation together with support mandrel. Safety mechanism also has a transition connector installed on the outer side of the unscrewing connector and having a threaded connection with the unscrewing connector. Also, the safety mechanism comprises a spring located between the support mandrel and the transition connector in the radial direction and between the spring coupling and the unscrewing connector in the axial direction. Spring coupling is made with possibility of spring compression in response to support mandrel movement downwards until it rests against adapter connector. Unscrewing connector is made with possibility of rotation together with rotation of the support mandrel, thereby disengaging the threaded connection between the unscrewing connector and the adapter connector.
EFFECT: high reliability of the disclosed device, as well as high sealing effect.
16 cl, 10 dwg
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