Zhengjun Long

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Case-based teaching is an usual teaching method. It has been introduced in so many course teaching due to its special merits. While, HSE Risk Management is a special elective course which is established in petroleum engineering and associate professionals. This course is aim at training undergraduate with special background to managers with certain HSE(More)
The borehole sloughing type of collapsing is very common in the drilling process. And this condition may result in drill string sticking and enlarged hole and induce other underground complex conditions, which may affect the successful drilling and underground safety. This thesis analyzes the elements resulting in borehole sloughing, components and(More)
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