API RP 54:1999(R2013) pdf download.Recommended Practice for Occupational Safety for Oil and Gas Well Drilling and Servicing Operations
3 Definitions
3.1 GENERAL DEFINITIONS The following definitions are provided to help clarify and explain use of certain terms in this publication. Users should recognize that some of these terms could be used in other instances where the application or meaning may vary from the specific information provided herein. 3.1.1 acidizing: The act of pumping an acidic solution into a wellbore to remove materials from the perforations, pipe, and walls of the producing formation or pumping the solution into formations to improve permeability. 3.1.2 adequate ventilation: Adequate ventilation, as used in this document, is for the prevention of fire and explo- sions. Adequate ventilation is ventilation (natural or artificial) that is sufficient to prevent the accumulation of significant quantities of vapor-air mixtures in concentrations above 10% of their lower explosive limit (LEL). 3.1.3 annular space: Space surrounding pipe in the wellbore. The outer wall of the annular space may be open hole or pipe. 3.1.4 ANSI: American National Standards Institute. 3.1.5 API: American Petroleum Institute. 3.1.6 approved: Sanctioned, endorsed, accredited, certi- fied, or accepted by a duly constituted and recognized author- ity or agency. 3.1.7 ASTM: American Society for Testing and Materials.3.1.8 authorized person: A person assigned by an employer to perform or supervise the performance of a spe- cific type of duty or duties at the work site. 3.1.9 back up: Refers to the act of “backing up” or pre- venting rotation of one section of pipe or rods while another is screwed out of or into it. Also applied to screwing nuts on or off bolts. A backup wrench refers to any wrench being used to hold the pipe, rods, or bolt. Backup tongs refers to the pipe tongs suspended in the derrick and used to hold a section of pipe while another section is screwed out of or into it by use of other tongs. The backup man is the crew member who operates the backup tongs. The backup position refers to the workstation of the backup man. 3.1.10 blocks, crown, and traveling: The fixed upper and movable lower blocks, respectively, of the block and tackle assembly on a rig that raises and lowers the drill string or tubing. 3.1.11 blowout: An uncontrolled flow of well fluids and/ or formation fluids from the wellbore or into lower pressured subsurface zones (underground blowout). 3.1.12 blowout preventer (BOP): A device attached to the wellhead or Christmas tree that allows the well to be closed in with or without a string of pipe or wireline in the borehole. 3.1.13 blowout preventer remote control: A set of control tools that can be used to actuate the blowout preventer from a position some distance away from the blowout pre- venter, usually the rig floor or accumulator. 3.1.14 breaking out pipe: Operation of unscrewing a pipe section. 3.1.15 bypass: Usually refers to a pipe connection around a valve or other control mechanism. A bypass is installed in such cases to permit passage of fluid through the bypass line while adjustments or repairs are made on the con- trol that is bypassed.
API RP 54:1999(R2013) pdf download
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