scope:

Coverage. This recommended practice involves not only the selection of drill string members, but also the considerations of hole angle control, drilling fluids, weight and rotary speed, and other operational procedures.

Sections 2, 3, 4, and 5 provide a step-by-step procedure for selection of drill string members in normal, near-vertical holes. Sections 6, 7, 8, and 11 are related to operating limitations which may reduce the normal capability of the drill string. Section 9 contains classification system for used drill pipe and inspection procedures for other drill string members. Section 10 contains statements regarding welding on down hole tools.

Policy. This API Recommended Practice may be used by anyone desiring to do so, and every effort has been made by the Institute to assure the accuracy and reliability of the data contained. However, the Institute makes no representation warranty, or guarantee in connection with the publication of any API recommended practice and hereby expressly disclaims any liability or responsibility for loss or damage resulting from their use, for any violation of any federal, state, or municipal regulation with which an API recommended practice may conflict, or for the infringement of any patent resulting from the use of an API recommended practice.