彭玉丹等-中国石油大学（华东）-有内部腐蚀缺陷的防沙网管在外部压力下的崩溃强度研究

Session 1 - Oral 5

Study on Collapse Strength of Sand Control Screen Pipe with Internal Corrosion Defect with External Pressure

Yudan Peng 1  Baojiang Sun*1  Guangming Fu1  Xiaoyu Chen 1  Jingbo Wang 2  Mingliang Li1  Yuhang Tuo1

1School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong, China

2. Dongying Ruifeng Petroleum Technology Development Co.Ltd.

ABSTRACT：At present, there are few reports on the collapse strength of screen pipe with corrosion defects under external pressure. In this paper, based on ABAQUS finite element software, a parallel screen pipe finite element model with corrosion defect under external pressure is established, and the influence of corrosion defect parameters and perforation parameters on the collapse strength of the screen pipe with corrosion defect is analyzed. The analysis results show that with the corrosion defect close to the middle of the screen pipe, the smaller the collapse strength of corrosive screen tube is; With the increase of corrosion depth and length, the collapse strength of screen pipe with corrosion defects gradually decreases, and the corrosion depth has the greatest influence on the collapse strength of screen pipe. With the change of corrosion parameters, such as corrosion length, corrosion width and corrosion depth, the deformation form of corrosion screen pipe will change. With the increase of hole size, number of circumferential holes and number of axial holes, the collapse strength of corrosive screen pipe decreases gradually. Among them, the hole size and the number of axial holes have great influence on the collapse strength of corroded screen pipe. The results of this study can provide reference for strength evaluation and life prediction of corroded screen pipes.

KEY WORDS: corrosion defect; screen pipe; hole arrangement parameter; collapse strength; Finite element method