Book excerpt: This book examines and explains techniques for development drilling through directional wells. It has been written by operating company field engineers assisted by drilling consultants. Illustrations show how measuring and guidance devices work, and general procedures and recommendations for equipment are given for each deviation method. Intended for drilling engineers and supervisors in charge of development operations involving deviated wells, the book may be profitably consulted by project and design engineers working in well siting.Contents: I. Introduction to directional drilling. II. Recommendations for working out a directional drilling plan. III. Directional surveying. IV. Directional drilling practice. Index.