Method estimates collapse strength of worn casing

New equations for calculating the collapse strength of worn casing can aid future casing string design.During any drilling, it is inevitable that drill pipe rotation and tripping will cause casing wear, which can lead to tubular failures. Casing wear is a severe problem that reduces casing string performance, especially collapse resistance, threatening well safety.Casing string design that considers the effect of wear on casing collapse resistance is the main way to prevent collapse of worn casing. Estimating the remaining collapse strength of worn casing is essential. Click here to enlarge imageThis article presents a new equation for predicting the remaining collapse strength of worn c...

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