Patent · US Expired

Apparatus for underwater welding of pipes

US4171175A · kind A · utility

7Cited by

5References

15Claims

0Family size

Assignees

Compagnie Francaise Des Petroles · FR
Etudes Petrolieres Marines, Societe a Responsabilite Limitee · 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 Production Tour Elf · FR

Inventors

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

Key dates

Filing date	Jul 19, 1976
Grant date	Oct 16, 1979
Priority date	—
Expiry date	Jul 19, 1996

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB23K9/0061
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A system for 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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.