Abstract: In view of geologic characteristics of Iraqi Halfaya Oilfield, we have conducted research in a series of technologies like wellbore configuration and selection of bit types, drillstring assembly and drill fluid systems, conducted customized selection of bits, and come up with drilling fluid type and cementing methods suitable for this Block; have developed matching technology for quality drilling applicable to the drilling characteristics of Iraqi Halfaya Oilfield. There is a great breakthrough in leak protection and sealing in easy leaking layers, application of salt-resistant strong inhibition drilling fluid, narrow clearance cementing quality and increase in drilling rate, etc. Through the optimum drilling technology, comprehensive drilling cost is greatly reduced, and the objective of safe drilling without accidents has been realized for this region.