Device for expanding pipes

E - Fixed Constructions – 21 – B

Patent

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Details

153/16, 166/62

E21B 29/10 (2006.01) B21D 41/02 (2006.01) E21B 43/10 (2006.01)

Patent

CA 1322151

ABSTRACT The device is intended for expanding profile pipes set in a well for patching off a troublesome zone, and also for straightening crumpled casings. The device comprises a housing having an expanding member mounted thereon in bearings on a journal exten- ding at an acute angle to the longitudinal axis of the housing. The expanding member is shaped as a spherical segment having its external surface defined by alterna- ting portions of a spherical surface and the lateral surfaces of cylinders whose geometric axes belong to a plane perpendicular to the axis of the journal.

609485

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