Drill pipe reforming method and apparatus

Details Drill pipe reforming method and apparatus Drill pipe reforming method and apparatus

1979-03-22

1981-03-03

Husar, Francis S.

Metal deforming

By relatively receding work-engaging tool-faces

Embodying three or more tools

72399, B21D 314

Patent

active

042533244

ABSTRACT:
A method and apparatus is provided for reforming crushed or otherwise damaged drill pipe and the like. A plurality of expandable shoe elements are inserted into the large diameter portion of the drill pipe adjacent the crushed section. A ram or plunger is forced into and between the shoes to expand the shoes within the drill pipe for removing crushed portions thereof. More particularly, the length of travel of the plunger is coordinated to expand the shoes the proper extent to restore the drill pipe to its original configuration.

REFERENCES:
patent: 1153663 (1915-09-01), Wiedeke
patent: 1539643 (1925-05-01), Bush
patent: 1719720 (1929-07-01), Olsen
patent: 2461565 (1949-02-01), Morrill
patent: 2818102 (1957-12-01), Seifferle
patent: 3348292 (1967-10-01), Turner
patent: 3550424 (1970-12-01), Rast
patent: 3564897 (1971-02-01), Rickard
patent: 3581548 (1971-06-01), Hygren
patent: 3817079 (1974-06-01), Priester

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