Title of Invention

A METHOD AND A SYSTEM FOR INTERCONNECTING TUBULARS BY FORGE WELDING

Abstract The invention relates to a method for interconnecting tubulars by forge welding involves arranging the tubular ends that are to be interconnected at a distance, up to a few millimeters from each other in a shield gas chamber, into which a reducing non-explosive flushing fluid mixture (e.g. N<sub>2</sub>+H<sub>2</sub> is injected; heating each tubular end within the space by means of at least three electrodes that are pressed at circumferentially spaced intervals against the wall of each tubular, adjacent to the tubular end such that a high frequency electrical current is transmitted in a substantially circumferential direction through the tubular segments between the electrodes; and moving the thus uniformly heated tubular ends towards each other until a forge weld is formed between the heated tubular ends. The invention also relates to a system for interconnecting tubulars by forge welding.
Full Text

Documents:


Patent Number 234564
Indian Patent Application Number 1462/CHENP/2004
PG Journal Number 29/2009
Publication Date 17-Jul-2009
Grant Date 08-Jun-2009
Date of Filing 29-Jun-2004
Name of Patentee SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V
Applicant Address Carel van Bylandtlaan 30, NL-2596 The Hague,
Inventors:
# Inventor's Name Inventor's Address
1 ALFORD, Robert, Andrew Volmerlaan 8, NL-2288 GD Rijswijk,
2 COLE, Anthony, Thomas Volmerlaan 8, NL-2288 GD Rijswijk,
3 DIMITRIADIS, Klisthenis Volmerlaan 8, NL-2288 GD Rijswijk,
PCT International Classification Number B23K 11/02
PCT International Application Number PCT/EP02/14865
PCT International Filing date 2002-12-31
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 01205146.2 2001-12-31 EUROPEAN UNION