APPARATUS FOR SIZING TUBE END PORTIONS Russian patent published in 2002 - IPC

Abstract RU 2186649 C2

FIELD: manufacture of tubes for oil industry. SUBSTANCE: apparatus includes housing with separator in which idle cone rollers are arranged. Said rollers rest by their cone surface upon supporting head in the form of cone pressure sleeve. Rod with supporting shoulder in the form of truncated cone is coaxially arranged in housing. Diameter of rod along length of sizing portion is equal to inner diameter of tube. Less diameter of truncated cone of shoulder in plane of tube end is equal to diameter of cut thread with allowance for working. EFFECT: enhanced strength and operational parameters of threaded joint of tubes. 1 dwg

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RU 2 186 649 C2

Authors

Chikalov S.G.

Salomatov V.G.

Kuznetsov V.Ju.

Frolochkin V.V.

Dates

2002-08-10—Published

2000-04-04—Filed