Method of welding the ends of submerged pipes by sleeve abutment

US4302652A · kind A · utility

Assignees

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

Inventors

• Philippe C. Nobileau · Paris, FR
• Rene M. Dermy · Évry, FR
• Guy J. Fleury · Paris, FR

Key dates

• Filing date: Jun 6, 1979
• Grant date: Nov 24, 1981
• Expiry date: Jun 6, 1999

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B23K9/0061
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A method of welding the ends of submerged pipes in a gaseous atmosphere at any depth comprises isolating the ends of the pipes by introducing obturators therein and then introducing the pipe ends into an open topped receptacle which is capped with an underwater personal carrying intervention unit. The closed receptacle is filled with gas and then a sleeve is positioned between the ends of the pipes and welded to the pipes.