Glossary
Browse the IADC Lexicon alphabetically or by category. Get comprehensive definitions of drilling industry terms.
Corrosive
Definition(s)
Corrosive
A substance that causes visible destruction of, or irreversible alterations in, living tissue by chemical action at the site of contact. Source: Petroleum Safety Orders--Drilling and Production, Definitions, California Code of Regulations, 8 CCR § 6505, December 2012. RegulationsCost Calculation For Plugging An Inactive Well
Definition(s)
Cost Calculation For Plugging An Inactive Well
The cost, calculated by the Commission or its delegate, for each foot of well depth plugged based on average actual plugging costs for wells plugged by the Commission for the preceding state fiscal year for the Commission Oil and Gas Division district in which the inactive well is located. Source: Oil and Gas Division, Texas Administrative Code, Title 16, Chapter 3, February 2013. RegulationsCosta Afuera
Definition(s)
Costa Afuera
Comprende el mar territorial, la zona económica exclusiva y Ia plataforma continental de la Nación conforme a lo establecido en Ia Ley 10 del 4 de agosto de 1978, por medio de la cual se dictan norm as sobre mar territorial, zona econ6mica exclusiva, plataforma continental, y se establecen otras disposiciones.
Source: Resolución Número 40687 de 18 Jul 2017 Por la cual se establecen los criterios técnicos para proyectos de perforación exploratoria de hidrocarburos costa afuera en Colombia. Columbia Ministerio de Minas y Energia, RegulationsCPD
Definition(s)
CPD
Current Product Definition. Source: API STANDARD 16AR, Standard for Repair and Remanufacture of Drill-through Equipment, First Edition, April 2017. Global StandardsCPD
Complete design verified and validated definition of the requirements for the current assembled product, single equipment unit, or component part, including specified limits, tolerances, health requirements, safety requirements, environmental requirements, limitations of use, customer-specific requirements, design acceptance criteria, materials of construction, materials processing requirements, physical properties, physical dimensions, requirements for manufacturing process controls, inspection, assembly, testing, marking, handling, storage, maintenance, service, and record requirements. Source: API STANDARD 16AR, Standard for Repair and Remanufacture of Drill-through Equipment, First Edition, April 2017. Global StandardsCPD
“CPD” means central point delivery. Source: Oil and Gas, New Mexico Administrative Code Title 19, Chapter 15, January 2013. RegulationsCPR Course
Definition(s)
CPR Course
“CPR course” means a training course in cardiopulmonary resuscitation based on the publication of the Journal of the American Medical Association entitled Standards and Guidelines for Cardiopulmonary Resuscitation and Emergency Cardiac Care, dated June 6, 1986, as reprinted by the American Heart Association (cours RCP). Source: Canada Oil and Gas Occupational Safety and Health Regulations, SOR/87-612, February 2013. Regulations Source: Oil and Gas Occupational Safety and Health Regulations, SOR/87-612, Canada, current to April 29, 2013. RegulationsCraft
Definition(s)
Craft
“Craft” means any vessel, vehicle, hovercraft, semi-submersible, submarine or diving-submersible and includes a self-propelled, tethered, towed or bottom-contact apparatus, but does not include an installation (véhicule). Source: Canada Oil and Gas Diving Regulations, SOR/88-600, February 2013. Regulations Source: Nova Scotia Offshore Area Petroleum Diving Regulations, SOR/95-189, Canada, current to May 31, 2012. RegulationsCritical Area
Definition(s)
Critical Area
Area from the base of the tapered shoulder of the tool joint to a plane located 660 mm (26.0 in) away, or the end of the slip marks, whichever distance is greater. See Figure 4. NOTE When applied to the work-string tubing area, it is from the end of the pipe to a plane located 508 mm (20 in) away, or the end of the slip marks, whichever distance is greater. Source: API RP 7G-2, Recommended Practice for Inspection and Classification of Used Drill Stem Elements, First Edition, August 2009. Global StandardsCritical Area
Highly stressed regions on a primary load-carrying component. Source: API SPEC 7K, Drilling and Well Servicing Equipment Upstream Segment, Fifth Edition, June 2010 (August 2010). Global Standards Source:API SPECIFICATION 7K, Drilling and Well Servicing Equipment, Sixth Edition, December 2015. Global StandardsCritical Area
Highly stressed region of a primary-load-carrying component as defined by the manufacturer. Source: API RP 8B, Recommended Practice for Procedures for Inspections, Maintenance, Repair and Remanufacture of Hoisting Equipment, Seventh Edition, March 2002 (Reaffirmed: August 2012). Global StandardsCritical Area
A coastal wetland, an oyster reef, a hard substrate reef, submerged aquatic vegetation, or a tidal sand or mud flat as defined in Texas Natural Resources Code, §33.203. Source: Oil and Gas Division, Texas Administrative Code, Title 16, Chapter 3, February 2013. RegulationsCrop Land
Definition(s)
Crop Land
CROP LAND shall mean lands which are cultivated, mechanically or manually harvested, or irrigated for vegetative agricultural production. Source: Oil and Gas Conservation Commission, Practice and Procedure, Code of Colorado Regulations, 2 CCR 404-1, February 2013. RegulationsCrown Block
Definition(s)
Crown Block
“Crown block” means an assembly of sheaves or pulleys mounted on beams at the top of the derrick or mast over which a hoisting line is reeved. Source: Oil and Gas Drilling and Servicing Operations, Michigan Administrative Code R 408, February 8, 2013. RegulationsCrown Block Assembly
Definition(s)
Crown Block Assembly
An assembly of mechanical parts mounted on top of a derrick tower or mast, consisting of a framework to which a number of sheaves are fastened over which hoisting lines are reeved. Source: Petroleum Safety Orders--Drilling and Production, Definitions, California Code of Regulations, 8 CCR § 6505, December 2012. RegulationsCrude Oil
Definition(s)
Crude Oil
“Crude oil” means crude mineral oil, asphalt, ozokerite, all kinds of naturally occurring hydrocarbons and bitumens, whether solid, semi-solid or liquid and also includes natural gas liquid. Source: Law of Information Energy, Petroleum Act (No. 4) B.E. 2514 (1989), Thailand, as of June 2013. LegislationCrude Oil
Crude oil is any oil occurring naturally in the earth whether or not treated to render it suitable for transportation and includes crude oil where certain distillate fractions may have been removed from or added to. <Chapter II-2, part A, regulation 3>. Source: IMO Resolution MSC.99(73), amendments to the International Convention for the Safety of Life at Sea, 1974, as amended, 5 December 2000, International Maritime Organization. LegislationCrude Oil
"Crude oil" means petroleum in its natural state before it is refined or otherwise treated but from which water and foreign substances have been extracted. Source: The Oil Industry (Development) Act, 1974, Act No. 47 of 1974, India, as amended as of May 2013. LegislationCrude Oil
“Crude oil” means petroleum in its natural state before it has been refined or otherwise treated but from which water and foreign substances have been extracted. Source: The Petroleum and Natural Gas Rules, 1959 (As amended from time to time), India, as amended as of May 2013. RegulationsCrude Oil
Crude oil is any oil occurring naturally in the earth, whether or not treated to render it suitable for transportation, and includes:- crude oil from which certain distillate fractions may have been removed; and
- crude oil to which certain distillate fractions may have been added.
CSA
Definition(s)
CSA
Canadian Standards Association. API RP 500, Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Division 1 and Division 2, Third Edition, December 2012, Global Standards Source: API RP 14F, Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class 1, Division 1 and Division 2 Locations, Fifth Edition, July 2008. Global Standards Incident Reporting and Investigation Guidelines, The Canada-Nova Scotia Offshore Petroleum Board and Canada-Newfoundland and Labrador Offshore Petroleum Board, Canada, November 30, 2012. Regulatory Guidance Source: Nova Scotia Offshore Petroleum Occupational Health & Safety Requirements, Canada-Nova Scotia Offshore Petroleum Board, Canada, December 2000. Regulations Source: Safety Plan Guidelines, The Canada-Newfoundland and Labrador Offshore Petroleum Board, Canada-Nova Scotia Offshore Petroleum Board, and National Energy Board, Canada, March 31, 2011. Regulatory Guidance Source: Oil and Gas Occupational Safety and Health Regulations, SOR/87-612, Canada, current to April 29, 2013. RegulationsCSA
“CSA” means the Canadian Standards Association (ACNOR). Source: Canada Oil and Gas Occupational Safety and Health Regulations, SOR/87-612, February 2013. Regulations Source: Environmental Protection Plan Guidelines, The Canada-Newfoundland and Labrador Offshore Petroleum Board, Canada-Nova Scotia Offshore Petroleum Board, and National Energy Board, Canada, March 31, 2011. Regulatory GuidanceCubic Feet Of Gas Or Cubic Foot Of Gas
Definition(s)
Cubic Feet Of Gas Or Cubic Foot Of Gas
“Cubic feet of gas or cubic foot of gas” means that volume of gas contained in one cubic foot of space and computed at a base pressure of 10 ounces per square inch above the average barometric pressure of 14.4 psi (15.025 psi absolute), at a standard base temperature of 60 degrees fahrenheit. Source: Oil and Gas, New Mexico Administrative Code Title 19, Chapter 15, January 2013. RegulationsCubic Foot
Definition(s)
Cubic Foot
CUBIC FOOT of gas shall mean the volume of gas contained in one cubic foot of space at a standard pressure base and a standard temperature base. The standard pressure base shall be 14.73 psia, and the standard temperature base shall be 60° Fahrenheit. Source: Oil and Gas Conservation Commission, Practice and Procedure, Code of Colorado Regulations, 2 CCR 404-1, February 2013. RegulationsCubic Foot of Gas
Definition(s)
Cubic Foot of Gas
"Cubic foot of gas" means the volume of gas contained in one cubic foot of space at an absolute pressure of 14.65 pounds per square inch and at a temperature of 60°F. Conversion of volumes to conform to standard conditions shall be made in accordance with Ideal Gas Laws corrected for deviation from Boyle's Law when the pressure at point of measurement is in excess of 200 pounds per square inch gauge. Source: Corporation Commission, Oil and Gas Conservation, Oklahoma Administrative Code 165:10, February 2013. RegulationsCubic Foot of Gas
A cubic foot of gas is hereby defined as that amount of gaseous hydrocarbons contained in a cubic foot of space at the base temperature of 60 degrees F and an absolute pressure of 14.4 lbs./sq. in. plus 10 oz./sq. inch, which temperature and pressure are referred to as the base temperature and pressure, respectively. Source: Natural Resources, Office of Conservation – General Operations, Louisiana Administrative Code, Title 43, Part XIX, March 2013. RegulationsCubic Foot of Gas
"Cubic foot of gas" means that volume of gas contained in one cubic foot [28.32 liters] of space and computed at a pressure of fourteen and seventy-three hundredths per square inch absolute [1034.19 grams per square centimeter] at a base temperature of sixty degrees Fahrenheit [15.56 degrees Celsius]. Source: Oil and gas Conservation, North Dakota Administrative Code, Chapter 43-02-03, April 2012. RegulationsCubic Foot Of Gas Or Standard Cubic Foot Of Gas
Definition(s)
Cubic Foot Of Gas Or Standard Cubic Foot Of Gas
The volume of gas contained in one cubic foot of space at a standard pressure base and at a standard temperature base. The standard pressure base shall be 14.65 pounds per square inch absolute, and the standard temperature base shall be 60 degrees Fahrenheit. Whenever the conditions of pressure and temperature differ from the standard in this definition, conversion of the volume from these conditions to the standard conditions shall be made in accordance with the ideal gas laws, corrected for deviation. Source: Oil and Gas Division, Texas Administrative Code, Title 16, Chapter 3, February 2013. RegulationsCurrent
Definition(s)
Current
Current, in relation to a certificate of competence, means a certificate of competence that has been issued under regulation 23 and has not expired or been cancelled or suspended under regulation 26. Source: Health and Safety in Employment (Mining Administration) Regulations 1996, SR 1996/220, New Zealand, as of January 2011. RegulationsCurrent Safety Case
Definition(s)
Current Safety Case
“Current safety case” means a safety case in respect of an installation which has been accepted by the Executive pursuant to these Regulations or, subject to regulation 27, the 1992 Regulations and includes any revision thereto which—- may take effect without the acceptance of the Executive; or
- has been accepted by the Executive.
Current Safety Case
For the purpose of this regulation, where there are safety cases under regulations 4(2) and 7 of the 1992 Regulations in respect of an installation “current safety case” means the safety case prepared under regulation 7. Source: The Offshore Installations (Safety Case) Regulations 2005, UK S.I. 2005/3117, 2005. RegulationsCurrent Safety Case
In SI 1989/971, regulation 2(1) (interpretation) after the definition of “appropriate languages” insert ““current safety case” means a current safety case within the meaning of regulation 2(1) of the 2005 Regulations. Source: The Offshore Installations (Safety Case) Regulations 2005, UK S.I. 2005/3117, 2005. RegulationsCyclic Steam Injection
Definition(s)
Cyclic Steam Injection
The alternating injection of steam and production of oil with condensed steam from the same well or wells. Source: Oil and Gas Division, Texas Administrative Code, Title 16, Chapter 3, February 2013. RegulationsCZMA
Definition(s)
CZMA:
CZMA means Coastal Zone Management Act. Source: Oil and Gas and Sulphur Operations in the Outer Continental Shelf, 30 CFR 250 (2013). RegulationsD-J Basin Fox Hills Protection Area
Definition(s)
D-J Basin Fox Hills Protection Area
D–J BASIN FOX HILLS PROTECTION AREA shall mean that area of the State consisting of Townships 5 South through Townships 5 North, Ranges 58 West through 70 West, and Township 6 South, Ranges 65 West through 70 West. Source: Oil and Gas Conservation Commission, Practice and Procedure, Code of Colorado Regulations, 2 CCR 404-1, February 2013. RegulationsDaily Drilling Report
Definition(s)
Daily drilling report
Daily drilling report means a report that includes:- the name of the well; and
- the location of the well by latitude and longitude; and
- the water depth at the well; and
- the drilled depth; and
- the work carried out; and
- the lithology of formations penetrated; and
- details of any indication of hydrocarbons; and
- a summary of the material used; and
- drilling fluid losses; and
- a leak off test summary; and
- the geometry of the well bore; and
- the results of surveys made in the well bore; and
- the estimated daily and cumulative well costs.
Damaged Condition
Definition(s)
Damaged Condition
“Damaged condition” means, with respect to a floating platform, the condition of the platform after it has suffered damage to the extent described in the Code referred to in subsection 57(9) (condition avariée). Source: Canada Oil and Gas Installations Regulations, SOR/96-111, Canada, current to May 1, 2014. Regulations Source: Canada Oil and Gas Installations Regulations, SOR/96-118, February 2013.Regulations Source: Nova Scotia Offshore Petroleum Installations Regulations, SOR/95-191, Canada, current to May 31, 2012. RegulationsDanger
Definition(s)
Danger
“Danger” means any existing or potential practice or condition or any current or future set of circumstances that poses an unacceptably high risk with respect to causing injury or illness to a person, whether or not the injury or illness occurs immediately or results in delayed effects that are deleterious to health or safety. Source: Nova Scotia Offshore Petroleum Occupational Health & Safety Requirements, Canada-Nova Scotia Offshore Petroleum Board, Canada, December 2000. RegulationsDangerous Occurrence
Definition(s)
Dangerous occurrence
Dangerous occurrence has the meaning given by subregulation 2.41 (2). Source: Offshore Petroleum and Greenhouse Gas Storage (Safety) Regulations 2009 (Select Legislative Instrument 2009 No. 382 as amended), Australia, prepared on 1 January 2012. RegulationsDangerous occurence
For the definition of dangerous occurrence in clause 3 of Schedule 3 to the Act, an occurrence, at a facility, that is specified in the following table is a dangerous occurrence.- An occurrence that did not cause, but could reasonably have caused:
- the death of, or serious personal injury to, a person; or
- a member of the workforce to be incapacitated from performing work for the period mentioned in subregulation (1)
- A fire or explosion
- A collision of a marine vessel with the facility
- An uncontrolled release of hydrocarbon vapour exceeding 1 kilogram
- An uncontrolled release of petroleum liquids exceeding 80 litres
- A well kick exceeding 8 cubic metres (or 50 barrels)
- An unplanned event that required the emergency response plan to be implemented
- Damage to safety-critical equipment
- An occurrence to which items 1 to 8 do not apply that:
- results in significant damage to a pipeline (for example, reducing the capacity of the pipeline to contain petroleum or greenhouse gas substance flowing through it); or
- is likely to have a result of a kind mentioned in paragraph (a); or
- is of a kind that a reasonable pipeline licensee would consider to require immediate investigation
- Any other occurrence of a kind that a reasonable operator would consider to require an immediate investigation.
Dangerous occurence
Dangerous occurrence means an occurrence declared by the regulations to be a dangerous occurrence for the purposes of this definition. Source: Offshore Petroleum and Greenhouse Gas Storage Act 2006, Australia, amended 2012. LegislationDangerous occurence
In this regulation, dangerous occurrence means any of the following events that arose out of or in connection with petroleum operations: (a) an event that did not cause, but might reasonably have caused, a major accident: (b) a well kick that either— (i) exceeded 8 cubic metres (or 50 barrels); or (ii) required the well to be shut-in: (c) an uncontrolled release of hydrocarbon vapour exceeding 1 kilogram: (d) an uncontrolled release of petroleum liquids exceeding 80 litres: (e) the failure of any part of a well whose failure would cause or contribute to, or whose purpose is to prevent or limit the effect of, the unintentional release of fluids from a well or a reservoir being drawn on by a well: (f) damage to, or failure of, a safety-critical element that required intervention to ensure it will operate as designed: (g) a fire or explosion at an installation: (h) the uncontrolled or unintentional release or escape of any substance (other than petroleum) on or from an installation, where that release or escape had the potential to cause death or serious harm to any person: (i) an unintended collapse of— (i) an installation; or (ii) any part of an installation; or (iii) any plant on an installation, where that collapse jeopardised, or could have jeopardised, the integrity of the installation: (j) subsidence or local collapse of the seabed or ground that could have affected the foundations, or the integrity, of an installation: (k) an unplanned event (other than a false alarm) that required the emergency response plan to be implemented: (l) damage to an installation, caused by adverse weather conditions, earthquakes, or other natural events, that had the potential to cause death or serious harm of any person: (m) a collision between a vessel, aircraft, or vehicle and an installation that resulted in damage to the installation, the vessel, the aircraft, or the vehicle: (n) a failure of equipment required to maintain a floating offshore installation on station: (o) an incident involving loss of stability or buoyancy of a floating offshore installation. Source: Health and Safety in Employment (Petroleum Exploration and Extraction) Regulations 2013, SR 2013/208, New Zealand, as of May 2013. RegulationsData
Definition(s)
Data
Collection of values assigned to base measures, derived measures and/or indicators. [SOURCE: ISO/IEC 15939:2007] Note 1 to entry: This definition applies only within the context of ISO/IEC 27004:2009. Source: ISO/IEC 27000:2014, Information technology — Security techniques — Information security management systems — Overview and vocabulary, Third Edition, January 2014. Global StandardsData
Data means facts and statistics, measurements, or samples that have not been analyzed, processed, or interpreted. Source: Oil and Gas and Sulphur Operations in the Outer Continental Shelf, 30 CFR 250 (2013). RegulationsData
Data includes:- information in any form; and
- any program (or part of a program).
Date
Definition(s)
Date
Date―the postmarked date of a letter or the transmittal date of a telegraphic or wireless communication. Source: Natural Resources, Office of Conservation – General Operations, Louisiana Administrative Code, Title 43, Part XIX, March 2013. RegulationsDate Of Completion
Definition(s)
Date Of Completion
"Date of completion" means:- For an oil well, the date that the well first produces oil into the lease tanks through permanent wellhead equipment.
- For a gas well, the date of completion of a gas well is the date that gas is capable of being delivered to a pipeline purchaser.
- For a well, which does not produce either oil or gas, is the date on which attempts to obtain production from the well cease.