API 7:2002 pdf download.Specification for Rotary Drill Stem Elements
3 Definitions
For the purposes of this specification, the following defini- tions apply: 3.1 bevel diameter: The outer diameter of the contact face of the rotary shouldered connection. 3.2 bit sub: A sub, usually with 2 box connections, that is used to connect the bit to the drill stem. 3.3 box connection: A threaded connection on Oil Coun- try Tubular Goods (OCTG) that has internal (female) threads. 3.4 calibration system: A documented system of gauge calibration and control, . 3.5 cold working: Plastic deformation of metal at a tem- perature low enough to insure or cause permanent strain. 3.6 decarburization: The loss of carbon from the surface of a ferrous alloy as a result of heating in a medium that reacts with the carbon at the surface. 3.7 drift: A gauge used to check minimum ID of loops, flowlines, nipples, tubing, casing, drill pipe, and drill collars. 3.8 drill collar: Thick walled pipe to provide sifness and concentration of weight at the bit. 3.9 drill pipe: A length of tube, usually steel, to which special threaded connections called tool joints are attached. 3.10 forging: (1) Plastically deforming metal, usually hot, into desired shapes with compressive force, with or without dies. (2) A shaped metal part formed by the forging method. 3.11 full depth thread: A thread in which the thread root lies on the minor cone of an external thread or lies on the major cone of an interal thread. 3.12 gauge point: An imaginary plane, in the pin threads, perpendicular to the thread axis, in which the pitch diameter equals the value in Column 5 of Table 25. 3.13 kelly: The square or bhexagonal shaped steel pipe con- necting the swivel to the drill pipe. The kelly moves through the rotary table and transmits torque to the drill string. 3.14 kelly saver sub: A short subtitute that is made up onto the bottom of the kelly to protect the pin end of the kelly from wear during make-up and break-out operations. 3.15 last engaged thread: The last thread on pin engaged with the box. 3.16 LBr: Length of threads in the box measured from the make-up shoulder to the intersection of the non-pressure fank and crest of the last thread with full thread depth.
API 7:2002 pdf download
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