A Study on the Casing Wear Mechanism in Highly-deviated Well Drilling

doi:10.11885/j.issn.1674-5086.2014.05.08.02

Abstract

Abstract:

Aimed at studying the wear failure in the drilling process of highly-deviated well，this paper firstly carried out casing
wear experiment research. According to the liner casing wear model based on the energy loss suggested by Dawson R and
White J，and the experiment，the joint-casing wear coefficient is obtained. The finite element model of casing wear mechanism
research is constructed using ABAQUS software. This paper uses the re-development user subroutine and Arbitrary Lagrange-
Euler mesh. In the process of numerical simulation，the location of the wear node can be adjusted timely，the mesh element
is smoothed，and the contact relations between joint and casing is altered continuously，which all contribute to the study on
casing wear mechanism. Based on the shape of worn casing，the numerical simulation research is carried out to determine the
remaining collapse strength，as a result of which，the relationship between the maximum wear depth and wear time is obtained.
On this basis，the exact relationship between the maximum wear depth and wear time is determined to predict the maximum
wear depth and remaining strength of casing after a period of accumulating wear time，which also provides theoretical basis for
the safety assessment of worn casing.

Key words: experiment study, casing wear, finite element, remaining strength, collapse strength

CLC Number:

TE931

LIAN Zhanghua1*, YU Hao1, LIU Yonghui2, LIN Tiejun1, ZHANG Qiang1. A Study on the Casing Wear Mechanism in Highly-deviated Well Drilling[J]. 西南石油大学学报(自然科学版), DOI: 10.11885/j.issn.1674-5086.2014.05.08.02.

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