Application of Simulation Technology on the Design of One Special Expandable Tubular Thread

Abstract:

(minimum 200words, maximum 300-500words) The solid expandable tubular technology is one of the most important ones which play key role in 21st century’s oil drilling industry. The expandable thread connection is one of the key factor of the technology which decide the success or failure of expansion casing site construction. Finite element simulation can help analyze the feasibility effectively on expandable casing thread connection structure design and save a lot of material and financial resources. According to a special expansion casing thread which with single hook thread characteristics, metal seal cylinder and seal ring, this paper use the finite element simulation analysis method to learn the stress, strain and displacement being occurred in thread connection during the process of expansion. The finite element simulation analysis results shown that the wall thickness decreased about 0.66mm after the expansion, the maximum stress of expandable casing connection during expansion was 494 MPa which between the yield stress(s_s= 380MPa) and ultimate strength(s_b= 650MPa) of the casing material, the most dangerous place of thread connection was the roots of thread, there was gapless between contact surfaces of the messing thread with contact pressure during the expansion, and the rubber sealing ring kept the state with the minimum 4.64 MPa compress stress during the expansion. Through the simulation, It can come to a conclusion that the special thread structure could meet the expected connection and seal function effectively during the expansion process, which provides an important basis for the following thread processing and expansion test.

• Periodical: Applied Mechanics and Materials (Volume 607)
• Pages: 257-263
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.607.257
• Online since: July 2014
• Authors: Yong Gang Liu*, Zhang Hua Lian, Xiao Jun Li, Ding Peng Ye
• Keywords: Design, Expandable Tubular, Simulation, Thread Connection

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