Glossary
Browse the IADC Lexicon alphabetically or by category. Get comprehensive definitions of drilling industry terms.
Accident Event
Definition(s)
Accident Event
An event that is assessed to be inappropriate and significant in the sequence of events that led to the marine casualty or marine incident (e.g. human erroneous action, equipment failure). Source: IMO resolution A.1075(28), Guidelines to assist investigators in the implementation of the Casualty Investigation Code, 4 December 2013, Regulatory GuidanceCasualty Event
Definition(s)
Casualty Event
The marine casualty or marine incident, or one of a number of connected marine casualties and/or marine incidents forming the overall occurrence (e.g. a fire leading to a loss of propulsion leading to a grounding). Source: IMO resolution A.1075(28), Guidelines to assist investigators in the implementation of the Casualty Investigation Code, 4 December 2013, Regulatory GuidanceWell Barrier Elements
Definition(s)
Well Barrier Elements
One of several dependent components that are combined to form a well barrier. Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global StandardsWell Barrier Elements
A pressure and flow containing component that relies on other component(s) to create a well barrier.
Source:API SPECIFICATION 19TT, Specification for Downhole Well Test Tools and Related Equipment, First Edition, October 2016. Global StandardsWell Barrier Elements
Well barrier elements include deep-set plugs under the production packer and plugs in the hanger assembly for the completion string. Source: Guidance Notes on Petroleum and Natural Gas (Safety in Offshore Operations) Rules, 2008, Oil Industry Safety Directorate (India), 2012. Regulatory GuidanceSuch Type Which is Capable
Definition(s)
Such Type Which is Capable
Such type which is capable means emphasis should be on the individual’s education and competence, experience, physical suitability, personal qualities and experience from drills and training when selecting the personnel. Source: Guidance Notes on Petroleum and Natural Gas (Safety in Offshore Operations) Rules, 2008, Oil Industry Safety Directorate (India), 2012. Regulatory GuidanceSituations of Hazard and Accident
Definition(s)
Situations of Hazard and Accident
The situations of hazard and accident also include situations of hazard and accident other than the defined, complex situations of hazard and accident, stress situations and situations where key personnel are incapacitated or are unable to carry out their duties. Source: Guidance Notes on Petroleum and Natural Gas (Safety in Offshore Operations) Rules, 2008, Oil Industry Safety Directorate (India), 2012. Regulatory GuidanceSerious Bodily Injury
Definition(s)
Serious Bodily Injury
‘Serious bodily injury’ means:- head injuries involving concussion, loss of consciousness or other serious consequences;
- loss of consciousness as a result of working environment factors;
- skeletal injuries, with the exception of simple hairline fractures or fractures of fingers or toes;
- injuries to internal organs;
- whole or partial amputation of parts of the body;
- poisoning with danger of permanent health injury, such as H2S poisoning;
- burns or corrosive injuries with full thickness skin injury (third degree) or partial thickness skin injury (second degree) to the face, hands, feet or abdomen, as well as all partial thickness skin injury that covers more than five per cent of the surface of the body;
- general cooling (hypothermia);
- permanent inability to work.
Right Alert
Definition(s)
Right Alert
Giving the ‘right alert’ means alerting the relevant locations / agencies based on respective action plans for various emergencies. These include, inter alia:- The facility's central control room or another central function;
- The Maritime Rescue Co-ordination Centre (MRCC);
- iii) One or more parts of the operator's emergency preparedness organization;
- iv) Contractors' emergency preparedness organisations;
- v) Other partners, as per the agreement related to coordinated emergency preparedness resources.
Processes
Definition(s)
Processes
Processes in this respect means production systems, drilling and well operations, combustion (exhaust), workshop activities (e.g. hot work, handling of coating products), evaporation from storage tanks, etc. Source: Guidance Notes on Petroleum and Natural Gas (Safety in Offshore Operations) Rules, 2008, Oil Industry Safety Directorate (India), 2012. Regulatory GuidancePreventive Measures or Routine Curative Services
Definition(s)
Preventive Measures or Routine Curative Services
Preventive measures and routine curative services shall include resources like well equipped medical room where medical officer can perform the duties mentioned in Rule 41 of Chapter-VII. Source: Guidance Notes on Petroleum and Natural Gas (Safety in Offshore Operations) Rules, 2008, Oil Industry Safety Directorate (India), 2012. Regulatory GuidanceNotice of Accident or Accident
Definition(s)
Notice of Accident or Accident
Notice of accident: Accidents as mentioned in this rule include fire and other incidents also. Source: Guidance Notes on Petroleum and Natural Gas (Safety in Offshore Operations) Rules, 2008, Oil Industry Safety Directorate (India), 2012. Regulatory GuidanceNo Interdependence of Barriers
Definition(s)
No Interdependence of Barriers
No interdependence between the barriers means that these barriers shall not be impaired or cease to function simultaneously, as a consequence of a single failure or a single incident. Example of ‘no interdependence’ of barriers - Two barriers during drilling -well fluid and BOP. In case of failure of first barrier (well fluid) due to increased formation pressure, BOP is not impaired. Hence no interdependence. - However Upper Pipe ram and Lower Pipe Ram BOPs are dependent barriers because if the BOP control system fails during kick, both BOPs will not function. Hence there is interdependence between the two. - Two barriers on pressure vessel - pressure switch high (PSH) and pressure safety valve (PSV). In case of failure of PSH due to control logic malfunction, functioning of PSV is not impaired. Hence no interdependence. Source: Guidance Notes on Petroleum and Natural Gas (Safety in Offshore Operations) Rules, 2008, Oil Industry Safety Directorate (India), 2012. Regulatory GuidanceNecessary Qualification
Definition(s)
Necessary Qualification
Necessary qualification means experience and technical / professional competence. Competence requirement includes professional competence, system knowledge and HSE aspects competence and should be in line with industry standards such as OPITO safety training standards for oil and gas industry and should be documented. Source: Guidance Notes on Petroleum and Natural Gas (Safety in Offshore Operations) Rules, 2008, Oil Industry Safety Directorate (India), 2012. Regulatory GuidancePenetrations
Definition(s)
Penetrations
Penetrations in fire divisions include ventilation ducts, pipes, cables and beams, as well as windows and doors. Source: Guidance Notes on Petroleum and Natural Gas (Safety in Offshore Operations) Rules, 2008, Oil Industry Safety Directorate (India), 2012. Regulatory GuidanceMutatis-mutandis
Definition(s)
Mutatis-mutandis
Mutatis-mutandis, a Latin word, means with respective differences taken into consideration. Source: Guidance Notes on Petroleum and Natural Gas (Safety in Offshore Operations) Rules, 2008, Oil Industry Safety Directorate (India), 2012. Regulatory GuidanceMeasures Against Intruding Vessels or Objects
Definition(s)
Measures Against Intruding Vessels or Objects
Measures against intruding vessels or objects: Such measures inter alia include use of Water Monitors, LARD (Long Range Acoustic Device), Offshore Supply Vessel. Source: Guidance Notes on Petroleum and Natural Gas (Safety in Offshore Operations) Rules, 2008, Oil Industry Safety Directorate (India), 2012. Regulatory GuidanceMajor Repairs
Definition(s)
Major Repairs
Welding repairs that involve removal and replacement of large sections of piping systems.
Source: API 570, Piping Inspection Code: In-service Inspection, Rating, Repair, and Alteration of Piping Systems, Fourth Edition, February 2016, with Addendum May 2017. Global Standards