Study on Defect Shape Influence on Strength of Oilfield Water Injection Tubing

doi:10.16182/j.issn1004731x.joss.201612024

Abstract

Abstract: Oilfield water injection tubing can form various defects which affect the strength of tubing body during the installation and other operations. For studying the influence of different shape defects to stress field of the oilfield water injection tubing, three kinds of defects which are hemispherical, half cylindrical and conical were chosen on the body surface of oilfield water injection tubing, to analyze the stress field distribution of tube body in the three kinds of load conditions that are the single internal pressure, the tensile load and internal pressure-tensile complex load. The simulation result show that: there are high and low stress areas appearing separately in the condition of the tubing body which exist three types of defect, the boundary of bottom flat and circular surface of defects where the fracture opening are easy to form, the stress field distribution from big to small of the tubing body with the defects are the semi-conical, the semi-cylindrical and the hemispherical. Simulation results contribute to understand water injection pipe state and ensure the smooth progress of water injection operation.

Key words: oil extraction equipment, water injection, defect shape, water injection tubing, strength

CLC Number:

TE984

Liu Qingyou, Xu Tao. Study on Defect Shape Influence on Strength of Oilfield Water Injection Tubing[J]. Journal of System Simulation, 2016, 28(12): 3048-3053.

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