Engineers consider wear in designing new casing strings for Tarim field

Gao Zhihai, Xi’an Jiaotong University, Xi’an City, ChinaA new method to design casing strings is based on predicted and actual wear of strings in the Tarim oil field, China.Casing wear during drilling reduces casing strength, especially collapse strength, which represents a safety hazard. This article presents a method of casing-string collapse strength design considering wear based on the prediction on casing wear and the remaining collapse strength of the worn casing. Software for casing string design was developed, applied, and validated, showing that the method may avoid worn casing collapse with good economy.Casing wear in ChinaIn Chinese oil fields, especially in the Tar...

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