Abstract
In order to reduce the human factor risk in drilling process, the author analyzed the primary reason of human factor risk in drilling process, selected twelve risk control measures and toke Delphi method to quantify the human factor risk mitigation capacity resulting from the selected risk control measures. The results shows that the human risk control measures exist in three tiers of effectiveness that with each tier being separated by nearly an order of magnitude, and the types of most risk mitigation are risk codes such as injury by machine, fall from height, contact with harmful material. And the most minimally risk mitigation ones are muscle strain, fire explosion and other types. Finally these data, which will be valuable for drilling companies to strategically allocate limited resources to their safety management plan, can evaluate the expected effectiveness resulting from risk control measures.
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