Invention Grant
- Patent Title: Pull tube sleeve stress joint for floating offshore structure
- Patent Title (中): 用于浮式海上结构的拉管套管应力接头
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Application No.: US12546794Application Date: 2009-08-25
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Publication No.: US08474539B2Publication Date: 2013-07-02
- Inventor: Michael Y. H. Luo , Bob Lixin Zhang , Shih-Hsiao Mark Chang
- Applicant: Michael Y. H. Luo , Bob Lixin Zhang , Shih-Hsiao Mark Chang
- Applicant Address: FR Courbevoie
- Assignee: Technip France
- Current Assignee: Technip France
- Current Assignee Address: FR Courbevoie
- Agency: Locke Lord LLP
- Main IPC: E21B17/01
- IPC: E21B17/01

Abstract:
The present disclosure provides an improved design for a pull tube sleeved stress joint and associated pull tube for managing stresses on a catenary riser for a floating offshore structure. The pull tube sleeve stress joint includes at least one sleeve surrounding a length of the pull tube with an annular gap between the sleeve and pull tube and a link ring therebetween. For embodiments having a plurality of sleeves, a first sleeve can be spaced by an annular first gap from the pull tube and coupled thereto with a first ring between the pull tube and the first sleeve, and a second sleeve can be spaced by an annular second gap from the first sleeve and coupled thereto with a second ring between the first sleeve and the second sleeve. Both pull tube and sleeves can be made with regular pipe segments welded together with regular girth welds.
Public/Granted literature
- US20110048729A1 PULL TUBE SLEEVE STRESS JOINT FOR FLOATING OFFSHORE STRUCTURE Public/Granted day:2011-03-03
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