SPECIFICATION for ROTARY DRILLING EQUIPMENT (Tenth Edition; Incorporates Supplement 1: October 1948; Supplement 2: December 1949; Supplement 3: June 1951)
Foreword This supplement covers changes for API Std 7B (Tenth Edition): Specification for Rotary Drilling Equipment as adopted by the Committee on the Standardization of Rotary Drilling Equipment at the 1947 and 1948 meetings and previously published in Sup. 2; also changes adopted at the 1949 and 1950 meetings and subsequently ratified by letter ballot. These changes include@ among others@ the revision of stipulations on tool joints@ drill collars@ kellys@ rotary drilling and vibrator@ hose@ rotary-drilling-bit connections@ gaging practice for rotary tool joints@ and the addition of five new sizes of slush pump liners.