E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 17/042 (2006.01) B21D 39/04 (2006.01) E21B 43/10 (2006.01) F16L 15/00 (2006.01)
Patent
CA 2486594
A method and apparatus is disclosed for providing an expandable threaded connection between segments of expandable tubulars is disclosed. Threaded connections are machined into pre-expanded ends (10, 20) of tubulars. Once the threaded connections are machined into the pre-expanded ends (10, 20), two joints (1) of tubulars are connected using the threads, thus creating a pre- expanded threaded connection. After a tubular string is made up and lowered into a wellbore, the entire length of the string is expanded using known methods for expanding tubulars. During the downhole expansion operation, the pre-expanded threaded connections experience minimal expansion. The minimal downhole expansion of the pre-expanded threaded connections allows the threaded connections to maintain their sealing ability and coupling strength.
L'invention concerne un procédé et un appareil destiné à établir un raccord extensible fileté entre des segments de matériels tubulaires extensibles. Des raccords filetés sont usinés avec des extrémités (10, 20) pré-extensibles de matériels tubulaires. Lorsque lesdits raccords extensibles sont usinés avec des extrémités (10, 20) pré-extensibles, deux joints (1) de matériels tubulaires sont reliés au moyen des filetages, créant ainsi un raccord fileté pré-extensible. Après la fabrication et l'insertion d'un train de tiges tubulaire, la longueur entière du train de tiges est allongée au moyen de procédés connus pour des matériels tubulaires extensibles. Lors de l'opération d'extension de fond, les raccords filetés pré-extensibles connaissent une extension minimale. L'extension minimale de fond des raccords filetés pré-extensibles permet aux raccords filetés de maintenir leur capacité de fermeture et leur force de couplage.
Marks & Clerk
Weatherford/lamb Inc.
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