Well-Drilling Machinery and Tools, No. 21: Section A of Price List (1907) is a book published by the Oil Well Supply Company. It is a comprehensive guide to the machinery and tools used in the drilling of oil wells. The book is divided into sections, with Section A focusing on the various types of drilling equipment available, including drilling rigs, rotary tables, and drawworks. It also covers the different types of drilling bits and the various drill pipe and casing sizes used in drilling operations. The book provides detailed descriptions of each piece of equipment, including its specifications, capabilities, and recommended usage. The publication is a valuable resource for anyone involved in the oil drilling industry, including drillers, engineers, and equipment manufacturers.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.