Preliminary Classification Of The Drilling Complex Conditions

This article is a research based on complex conditions of the deep hole drilling technology. To solve this problem,it chose the complex conditions encountered in the the drilling as the object of study. As the need for prospecting,drilling towards the more complex stratum and more deeper. Therefore, to strengthen the complex conditions in the deep hole drilling technology research is imperative. To strengthen the deep hole drilling under complex conditions, we must undersand the complex conditions more profound and more systematic. This paper, carried out under this condition requires. First, I did lots of analysis and research on the materials and practices of internal and external. And summarized the current classification of complex stratum.Meanwhile,I have analysised the various reasons leading to the complicated conditions carefully,which including geological and technical factors. And summarized the different detecting methods of the complex conditions and detecting equipment and related parameters. This article focused on the classification of complex conditions of drilling. Based on the analysising and researching, This paper divided the complex conditions into five main categories. They were strata easy tocollapsed and lost, strata of frozen soil, strata of drilling that easy to bend, strata hard to get core, hard strata.According to the characteristics of the five categories above,I classifid the stratas into smaller categories and analysised the characteristics of the smaller categoris. Finally,according to the characteristics of the categoris,it show the methods of prevention and treatment to the complicatied conditons.