Solution for Oil Casing Collapse Resistance and Relevant Development

Briefed here in the essay is the latest research updates and progressive development on the prediction formulas of collapse resistance of the oil casing.Advantages and limitations of each of the relevant theories are respectively analyzed.According to the new Klever-Tamano（K-T model）equation，main factors affecting the collapse resistance are analyzed，including manufacture quality factors like the pipe’s ovality and the residual stress.Elaborated here are also different solutions for oil/gas well-purposed anti-collapse casings and products as made at home and abroad.Various series of related products and solutions are compared in terms of advantages and disadvantages，and the control tips.Furthermore relevant suggestions are put forward，including using extra-heavy wall casing for deep well in abnormal hi-pressure stratum，having the anti-collapse casing subjected to quench-temper treatment，and enhancing design safety factor of collapse resistance of the casing.