FIELD: mechanical engineering. SUBSTANCE: rod has a set of flexible collars peripherally engageable with the inner surface of a pipe. The collars have a surface profiled according to projects and hollows of the pipe and identical to the pipe cross section. The collars have ribs of stiffness on the projections. The collar stiffness on this sections is equal or higher than that of hollow sections of the collars. EFFECT: improved structure. 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| PLANT FOR PIPE CORRUGATION | 1990 |
|
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| DEVICE FOR REPAIR OF CASED-THROUGH WELLS | 1992 |
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| METHOD OF FABRICATING CORRUGATED STEEL PATCH | 0 |
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| PATCH FOR REPAIRING CASING STRINGS | 1990 |
|
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| METHOD OF MANUFACTURE OF CORRUGATED PIPES | 0 |
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|
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| MANDREL FOR MAKING LONGITUDINAL CORRUGATIONS | 0 |
|
SU1648597A1 |
