METHOD OF MANUFACTURING A PIPE SEGMENT

摘要

The invention relates to a method of manufacturing a pipe segment for a link tube between the sea floor and a petroleum drilling rig disposed on the sea surface, wherein it consists in:
providing a transport pipe segment that is resistant to open-sea conditions;disposing a female bayonet-piece around one reinforced end of the transport pipe segment;welding or otherwise bonding a narrower portion of the bayonet-piece to said reinforced end;disposing an insulator around the transport pipe segment and around the bayonet-piece;inserting the transport pipe segment into an outer wall segment;welding or otherwise bonding a narrower portion of the outer wall segment to the other reinforced end of the transport pipe segment;disposing a cover-piece around the bayonet-piece;welding or otherwise bonding the cover-piece to the outer wall segment and to the bayonet-piece;it being possible to apply tightening torque to the outer wall segment and to transmit it to the transport pipe segment.

主权项

1. A method of manufacturing a double-walled pipe segment for a link tube between the sea floor and a petroleum drilling rig disposed on the sea surface, wherein said method consists in:
providing a connection and transport pipe segment that is resistant to open-sea conditions and that is provided with first and second threaded reinforced ends; disposing a female bayonet-piece around said first reinforced end, the female bayonet-piece including a wider portion that is extended by a cylindrical portion that is extended by a narrower portion that comes against a tightening portion of said first reinforced end; welding or otherwise bonding the narrower portion of the female bayonet-piece to said tightening portion of said first reinforced end; disposing a thermal insulator around the connection and transport segment pipe and around the female bayonet-piece; inserting said connection and transport pipe segment equipped with said thermal insulator into an outer wall segment; welding or otherwise bonding a narrower portion of the outer wall segment to said second reinforced end; disposing a cover-piece around the female bayonet-piece, the cover-piece having a cylindrical portion in contact at one end with the wider portion of the female bayonet-piece and being extended at the other end via a narrower portion coming against the outer wall segment; and welding or otherwise bonding the narrower portion of the cover-piece to the outer wall segment and its cylindrical portion to the female bayonet-piece; a determined tightening torque may be applied around the outer wall segment.