Outflow

Outflow

Definition(s)

Outflow

Fluids that flow out of one place to another, typically out of a well. Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards
Operated well

Operated well

Definition(s)

Operated well

Well for which the well operator has control and management of operations. Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards
MFL

MFL

Definition(s)

MFL

Magnetic Flux Leakage. Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards 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
Maximum allowable annulus surface pressure

Maximum allowable annulus surface pressure

Definition(s)

Maximum allowable annulus surface pressure

Greatest pressure that an annulus can contain, as measured at the wellhead, without compromising the integrity of any element of that annulus, including any exposed open-hole formations maximum allowable annulus surface pressure. Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards
MAH

MAH

Definition(s)

MAH

Major Accident Hazard.

Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards

MAH

Hazard with a potential for causing a major accident (3.37).

Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards

Inflow Testing

Inflow Testing

Definition(s)

Inflow Testing

Leak test of well barrier element by creating a differential pressure and observing for pressure change on the low pressure side
  • Note: 1 to entry: See also 5.9.3.3.
Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards
Imposed annulus pressure

Imposed annulus pressure

Definition(s)

Imposed annulus pressure

Annulus pressure that is imposed for purposes such as gas lift, water injection, thermal insulation, etc. [SOURCE: API RP 90, modified]. Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards
Impairment

Impairment

Definition(s)

Impairment

State of diminished ability to perform a function, without having yet failed. Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards
Formation Strength

Formation Strength

Definition(s)

Formation Strength

Pressure that the formation can withstand. Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards
Flow-wetted

Flow-wetted

Definition(s)

Flow-wetted

<surface> coming into direct contact with the dynamic movement of well fluids in the flow stream. [SOURCE: API Spec 11D1] Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards
Failure Mode, Effects, and Criticality Analysis

Failure Mode, Effects, and Criticality Analysis

Definition(s)

Failure Mode, Effects, and Criticality Analysis

Analysis usually performed after an FMEA (3.21) which can be based on the probability that the failure mode will result in system failure, or the level of risk associated with the failure mode, or a risk’s priority.

Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards

XLOT

XLOT

Definition(s)

XLOT

Extended leak off test. Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards  

XLOT

Application of pressure by superimposing a surface pressure on a fluid column in order to determine the pressure at which a fracture propagates into the exposed formation and also establishes the fracture closure pressure. Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards    
Extended leak off test

Extended leak off test

Definition(s)

Extended leak off test

Application of pressure by superimposing a surface pressure on a fluid column in order to determine the pressure at which a fracture propagates into the exposed formation and also establishes the fracture closure pressure. Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards
Dispensation

Dispensation

Definition(s)

Dispensation

Approval to operate with a deviation from a requirement. Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards
Deviation

Deviation

Definition(s)

Deviation

Departure from a standard. Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards
Deep-set

Deep-set

Definition(s)

Deep-set

Close to, or at, the cap rock of a reservoir or a depth where it is possible to achieve an overbalance pressure with an hydrostatic column to counter act the maximum anticipated pressure from below. Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards
Containment

Containment

Definition(s)

Containment

Preventing release of fluid. Source: ISO 16530-1:2017, Petroleum and natural gas industries - Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards
Breaking of Containment

Breaking of Containment

Definition(s)

Breaking of Containment

Controlled entry into the containment system of integrity or barrier. Source: ISO 16530-1:2017, Petroleum and natural gas industries - Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards
SSD

SSD

Definition(s)

SSD

Safety Shutdown System. Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards
PRV

PRV

Definition(s)

PRV

Pressure-relief valve. Source: ABS Guide for Classification and Certification of Managed Pressure Drilling Systems, September 2017. Global Standards Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards  

PRV

A flow-control device installed as part of the circulating system able to open and shut in response to operating conditions in order to maintain preset limits for pressure applied to parts of the circulating system to prevent over pressurization.

Source: ABS Guide for Classification and Certification of Managed Pressure Drilling Systems, September 2017. Global Standards
NPS

NPS

Definition(s)

NPS

Nominal Pipe Size. Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards
LSHH

LSHH

Definition(s)

LSHH

Level Switch High-High (High-High Level Shutdown). Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards
LOF

LOF

Definition(s)

LOF

Likelihood of Failure. Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards
LAHH

LAHH

Definition(s)

LAHH

High-High Liquid Level Alarm. Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards
LAH

LAH

Definition(s)

LAH

High Liquid Level Alarm. Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards
ERPG

ERPG

Definition(s)

ERPG

Emergency Response Planning Guideline Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards
DN

DN

Definition(s)

DN

Nominal Diameter.

Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards  

DN

Numerical designation of size that is common to all components in a piping system, other than components designated by outside diameters or by thread size.
  • Note: 1 to entry: It is a convenient round number for reference purposes and is only loosely related to manufacturing dimensions.
Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards

DN

Diametre nominal (nominal diameter). Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards
DIERS

DIERS

Definition(s)

DIERS

Design Institute for Emergency Relief Systems. Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards
CMA

CMA

Definition(s)

CMA

Chemical Manufacturers Association.

Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards
BRL

BRL

Definition(s)

BRL

Ballistics Research Laboratory.

Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards