深海水下采油树油管悬挂器结构设计研究

doi:10.11885/j.issn.1674-5086.2023.10.07.03

摘要/Abstract

摘要： 水下采油树是深海油气开发的关键设备，油管悬挂器作为油气通道、电通道，支撑油管柱并密封油管和套管之间环形空间，是采油树的核心部件，其结构强度关系到油气的安全生产。以南海某油气田油管悬挂器为例，结合对国外油管悬挂器的分析，进行了水下采油树油管悬挂器主体结构尺寸设计。采用有限元分析方法，建立了油管悬挂器的有限元模型，并对其在下放过程、安装就位过程、正常生产过程及锁紧解锁过程中进行了数值模拟分析。结果表明，在下放过程中，油管悬挂器的最大应力为310.43 MPa，最大变形为0.450 09 mm；在安装就位过程中，最大应力为310.43 MPa，最大变形为0.408 85 mm；在正常生产过程中，69 MPa、64 ℃时，油管悬挂器出油口的最大应力为311.13 MPa，最大变形为0.581 48 mm；在69 MPa、121 ℃时，最大应力为586.93 MPa，最大变形为1.334 70 mm。所设计油管悬挂器结构强度满足安全要求，变形较小，具有良好的结构安全性。该油管悬挂器已成功应用于中国首个自主研发的水下采油树系统，对推动中国水下油气生产系统的国产化具有重要意义。

关键词: 水下采油树, 油管悬挂器, 结构计算, 锁紧, 解锁

Abstract: The subsea christmas tree is a critical piece of equipment for deep-sea oil and gas development. The tubing hanger, serving as a channel for oil and gas and an electricity, supports the tubing column and seals the annular space between the tubing and casing, making it a core component of the christmas tree. Its structural strength directly impacts the safety of oil and gas production. Taking the tubing hanger from an oil and gas field in the South China Sea as an example, and analyzing foreign tubing hangers, the main structural dimensions of the underwater christmas tree's tubing hanger were designed. Finite element analysis was employed to establish the finite element model of the tubing hanger, and numerical simulations were conducted for its operations during the lowering process, installation, normal production, and locking and unlocking procedures. The results indicated that during the lowering process, the maximum stress of the tubing hanger was 310.43 MPa, with a maximum deformation of 0.450 09 mm. During the installation process, the maximum stress was 310.43 MPa, with a maximum deformation of 0.408 85 mm. Under normal production conditions of 69 MPa and 64 ℃, the maximum stress at the oil outlet of the tubing hanger was 311.13 MPa, with a maximum deformation of 0.581 48 mm. At 69 MPa and 121 ℃, the maximum stress was 586.93 MPa, and the maximum deformation was 1.334 70 mm. The analysis shows that the designed tubing hanger meets the safety strength requirements, exhibits minimal deformation, and has good structural safety. This tubing hanger has been successfully applied to China's first domestically developed underwater christmas tree system, which plays a significant role in advancing the localization of China's underwater oil and gas production systems.

Key words: subsea christmas tree, tubing hanger, structural calculation, locking, unlocking

中图分类号:

TE952

朱军龙, 李育房, 汝梦奇. 深海水下采油树油管悬挂器结构设计研究[J]. 西南石油大学学报(自然科学版), 2025, 47(2): 175-184.

ZHU Junlong, LI Yufang, RU Mengqi. Structure Design of Tubing Hanger for Deep Subsea Christmas Tree[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2025, 47(2): 175-184.

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