Load Distribution Balance Principle of Petroleum Buttress Casing Thread and its NC Machining Method

Abstract:

The force of each API standard buttress casing thread teeth under axial tension is uneven, so the bearing capacity of this kind of thread is seriously restricted. On the basis of structural characteristics, mechanical model of the casing thread under axial tension is established and the loading and deforming features of thread teeth are analyzed. Based on this, to improve force distribution of casing thread, the designing method of multi-segment variable pitch thread is put forward and NC machining method of variable pitch thread with equal tooth thickness is presented.

• Periodical: Materials Science Forum (Volume 723)
• Pages: 439-444
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.723.439
• Online since: June 2012
• Authors: Xiao Wei Wang, Pei Quan Guo, Lian Yi Zhao, Pu Zhang
• Keywords: Buttress Thread, Casing Thread, Force Analysis, NC Machining, Variable Pitch Thread

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