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现代地质 ›› 2009, Vol. 23 ›› Issue (6): 1147-1152.

• 海洋地质与水合物 • 上一篇    下一篇

天然气水合物保真取心装置内部密封技术分析

 张凌1, 蒋国盛1, 宁伏龙1, 涂运中2, 吴翔1, 窦斌1   

  1. 1中国地质大学 岩土钻掘与防护教育部工程研究中心,湖北 武汉430074;2中国地质大学 研究生院,湖北 武汉430074
  • 收稿日期:2009-01-06 修回日期:2009-04-20 出版日期:2009-12-29 发布日期:2012-02-16
  • 作者简介:张凌,男,讲师,1978年出生,地质工程专业,主要从事天然气水合物勘探开发、石油钻井以及工程钻探相关的教学与研究工作。Email:flyzling@yahoo.com.cn。
  • 基金资助:

     国家自然科学基金项目(50904053,50844062); 教育部“新世纪优秀人才支持计划”资助项目;中国地质大学(武汉)优秀青年教师资助计划项目“天然气水合物地层岩心后处理技术预研究”(CUGQNL0725)。

Analysis on Internal Sealing Technologies of Hydrate Pressure-Temperature Core Samplers

 ZHANG  Ling1, JIANG  Guo-Sheng1, NING  Fu-Long1, TU  Yun-Zhong2, WU  Xiang1, DOU  Bin1   

  1. 1Engineering Research Center of Rock-soil Drilling & Excavation and Protection of Ministry of Education, China University of Geosciences,
    Wuhan,Hubei430074, China; 2Graduate School, China University of Geosciences, Wuhan,Hubei430074, China
  • Received:2009-01-06 Revised:2009-04-20 Online:2009-12-29 Published:2012-02-16

摘要:

摘要:在海底天然气水合物地层钻探中,利用压力岩心取样器(PCS)获取保压岩心对于后续相关的处理和分析非常重要。首先回顾了国内保压保温取心器相关研究现状,然后从PCS取样腔内部球阀和O型圈等密封结构的特点分析了其内部上、下两部分的密封技术。在综合分析国内两种取样器密封结构特点的基础上,结合岩心现场处理与分析的特点,对PCS与上述两种取样器的密封技术进行了探讨,为取样器的密封设计、岩心现场压力和温度的保持以及保压岩心的保真转移提出了几点建议。

关键词: 天然气水合物, 压力岩心取样器, 密封, 球阀, O型圈

Abstract:

While drilling in the gas hydrate bearing formation under the seabed, it is very important to use the pressure core sampler(PCS) tool to obtain pressure cores for the further core handling and analyzing. The current domestic state of the art with respect to pressure-temperature core samplers is firstly reviewed in this article. Internal sealing technologies of PCS are analyzed from the upper and lower seals of the sample chamber, which include some seals, such as the ball valve and O-rings. The sealing characteristics of two domestic samplers are analyzed. Based on the above analysis, with the features of core in-situ handling and analyzing, the sealing technologies of PCS and two domestic samplers have been discussed. At last, some suggestions are brought out for designing the seals of sampler, maintaining the in-situ pressure and temperature, and transferring the pressure core.

Key words: gas hydrate, pressure core sampler, seal, ball value, O-ring

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