钻头选型 meaning in Chinese

bit selection
bit type selection
bit-type selection

Because of the merit of continuity , economical efficiency , reliability and high resolution , the well logging has shown its advantages , especially in some drilling engineering problem , such as the prediction of rock drillability , selecting the drill bit types , prediction of formation pressure , calculation the in - situ stress , evaluating the borehole walls stability and determining the reasonable mud density , and etc . aiming at the engineering accidents , for example the well spout , well leak , well collapse and the drill blocking during the drill engineering in the t formation in north - east of sichuan , some farther studies of formation pressure in feixianguan from well - logging information are presented in this dissertation
尤其是在岩石可钻性预测与钻头选型、地层压力预报、地应力计算以及井壁稳定性评价、泥浆密度安全窗确定等钻井工程问题上。测井技术由于连续性、经济性、可靠性及分辨率高等特点，越来越多地显示了其优越性。本文针对川东北部三叠系地层在钻井过程中遇到的井喷、井漏、井塌和卡钻等工程事故，主要对飞仙关组地层压力的测井解释方法作了大量的深入研究工作。