Affiliation:
1. Xi’an Shiyou University
2. Xi’an Shiyou University,
3. Xi an Shiyou University,
Abstract
The domestic manufactured CT80, Φ33×3.18 coiled tubing is supplied as heat-treated low-alloy steel. The relationship between thermo cycle, microstructure, tensile properties and hardness were researched for butt welded joint. The results show that CT80 is very sensitive to welding heat input, and the thermo accumulation was obvious for small dimension coiled tubing, varying degrees of softening always exist in HAZ. The reasons include growing of block ferrite, decreasing and isolating of continuous directional bainite. In order to get good properties, the strength of consumable welding wire should be properly matched with base metal, keep uniform strength distribution along welded joint, and avoid the plastic strain concentrate in local area.
Publisher
Trans Tech Publications, Ltd.
Reference7 articles.
1. Zongyue BI, Xiaotian JING, Shilin JIN, Peng ZHANG and Dongli MA: Oil Field Equipment Vol. 39 (2010), p.16, In Chinese.
2. Shaoli Wang and Ziyuan Zheng: Oil Field Equipment Vol. 37 (2008), p.91, In Chinese.
3. H. B. Luft and BJ Services: Development of Welding Procedure Specification for Girth Welds in Coiled Tubing (SPE, Texas 1999).
4. W. D. Van Arnam and D. Smith: Good Coiled Tubing Welds, Properly Managed, Do Not Break (SPE, Houston 2000).
5. K.R. Newman, P.A. Brown, W.D. Van Arnam, etc.: Analysis of coiled tubing welding techniques(SPE, Texas 1996).
Cited by
4 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献