文档介绍：Analysis of Jump-Out Loads about Connectors of
Buttress and Round Threads of Casing
Lian Zhanghua, Liu Yonggang, Tang Bo
Southwest Petroleum Institute, . Of China
Han Jianzeng, Zhang Yi
Shanghai Baoshan Iron & Steel co. LTD, . Of China
Yang Long
Tubular Goods Research Center PC, . Of China
Abstract
The finite element models of contact problems about connectors of buttress and round threads of casing
were established with the elasto-plastic FEM of ANSYS software. Under the three flank angles 30, 50 and
100 for the buttress casing connector, the curves that the jump-out loads varied with the loading process
were obtained. With the three tapers 1/14, 1/16 and 1/17, for the round casing connector, the curves that the
jump-out loads varied with the loading process were obtained. At the same time, the jump-out process of
the buttress and round thread connectors was studied, respectively. The average jump-out force of the
buttress connector is ton, and however, the average jump-out force of the round connector is
ton. That is to say, under the same casing and the same casing size, the connector of the buttress thread is
not so easy to jump out, but the connector of the round thread is very easy to jump out. It provides the
theoretical supports for the selection of the casing connectors in the extra-deep well plex well.