Butt-welding apparatus for assembling and laying pipe strings in deep water

US4214692A · kind A · utility

Assignees

• Compagnie Francaise Des Petroles · FR
• Societe Nationale Elf Aquitaine · FR
• Ateliers et Chantiers de Bretagne-ACB · FR
• Etudes Petrolieres Marines · FR
• Compagnie General pour les Developpements Operationnels des Richesses Sous-Marines CG Doris · FR
• Compagnie Maritime D'Expertises · FR

Inventors

• Roger J. Le Garfe · Rezé, FR
• Edmond Pignal · Longuenesse, FR
• Charles J. Magloire · Châtenay-Malabry, FR

Key dates

• Filing date: Mar 30, 1978
• Grant date: Jul 29, 1980
• Expiry date: Mar 30, 1998

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16L1/202
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

Butt-welding apparatus for welding two pipes, e.g. for the shipboard welding of a laid pipe and a towed pipe, comprises a frame for receiving the pipe ends, means for securing the pipe ends relative to the frame and compensation means for causing movement of one pipe relative to the other to compensate for any shrinkage caused by the welding operation and by preheating the pipe ends to be welded.