Drilling technology has been remarkably useful in the study of geothermal sciences. Much has been found and understood about the earth’s inner structure in the recent past owing to the progress of drilling and its scientific applications. This book contains some path-breaking studies in the field of drilling technology as it is a collective work of an eminent panel of internationally renowned scholars. Topics discussed in this book include instrumentation and observation, technological advances in drilling, earth sampling, mineral resources, etc. It strives to provide a fair idea about this discipline and develop a better understanding of the latest advances within this field. This book will serve as a reference to a broad spectrum of readers. It is highly recommended for students and researchers pursuing drilling technology and allied disciplines.