西南石油大学学报(自然科学版) ›› 2009, Vol. 31 ›› Issue (6): 148-151.DOI: 10.3863/j.issn.1674-5086.2009.06.033

• 石油机械工程及其它 • Previous Articles     Next Articles

MECHANICS ANALYSIS OF JETTING STRING DURING JETTING OPERATION OF CONDUCTOR

ZHANG Hui1 GAO De-li1 TANG Haixiong2   

  1. 1.MOE Key Lab of Petroleum Engineering,China University of Petroleum,Beijing 102249,China,2.Shenzhen Company Ltd.,CNOOC，Shenzhen Guangdong 518067,China)JOURNAL OF SOUTHWEST PETROLEUM UNIVERSITY(SCIENCE & TECHNOLOGY EDITION)，VOL.31，NO.6,148-151,2009（ISSN 1674-5086，in Chinese
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-12-20 Published:2009-12-20

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Abstract: Jetting string used in deepwater jetting operation of conductor has a special double-pipe structure,it is composed of inner bottom hole assembly (BHA) and outer conductor,which are in different mechanical systems.The axial load of jetting string is important for deformation and stress calculation on whole tubular string.Analysis indicates that axial load of conductor depends on friction resistance,and the load of BHA is influenced by hydraulic thrust load,jetting reacting force and weight on bit (WOB).The axial load can be transfered by running tool between both inner and outer tubules.The distribution of axial force along jetting string is calculated and the change law of neutral point on conductor during jetting operations is analyzed.It is useful for jetting conductor design and operations.

Key words: deepwater, jetting conductor, tubular string, axial force, neutral point

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