API RP 13L pdf download Recommended Practice for Training and Qualification of Drilling Fluid Technologists 3 Terms, Definitions and Abbreviations 3.1 TERMS AND DEFINITIONS 3.1.1 breadth: The basic knowledge common to all areas of drilling ßuids technology needed by all drilling ßuids technologists to demonstrate minimum competency. 3.1.2 depth: The knowledge acquired by all drilling ßuids technologists following 4 Ð...