ISO 10432:2004 石油および天然ガス産業—ダウンホール機器—地下安全弁機器 | ページ 6

3.1

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orifice

designed restriction causing the pressure drop in velocity-type SSCSVs

3.2

design acceptance criteria

defined limits placed on characteristics of materials, products, or services established by the organization, customer, and/or applicable specifications to achieve conformity to the product design

[SOURCE: ISO/TS 29001:2003]

3.3

design validation

process of proving a design by testing to demonstrate conformity of the product to design requirements

[SOURCE: ISO/TS 29001:2003]

3.4

design verification

process of examining the result of a given design or development activity to determine conformity with specified requirements

[SOURCE: ISO/TS 29001:2003]

3.5

end connection

thread or other mechanism providing equipment-to-tubular interface

3.6

environment

set of conditions to which the product is exposed

3.7

failure

any equipment condition that prevents it from performing to the requirements of the functional specification

3.8

fit

geometric relationship between parts

Note 1 to entry: This includes the tolerance criteria used during the design of a part and its mating parts, including seals.

3.9

form

essential shape of a product including all its component parts

3.10

function

operation of a product during service

3.11

functional test

test performed to confirm proper operation of equipment

3.12

heat treatment

heat treating

alternate steps of controlled heating and cooling of materials for the purpose of changing mechanical properties

3.13

interchangeable

conforming in every detail, within specified tolerances, to both fit and function of a safe design but not necessarily to the form

3.14

manufacturer

principal agent in the design, fabrication and furnishing of equipment, who chooses to comply with this International Standard

3.15

manufacturing

process and action performed by an equipment supplier/manufacturer that are necessary to provide finished component(s), assembly(ies) and related documentation, that fulfil the requests of the user/purchaser and meet the standards of the supplier/manufacturer

Note 1 to entry: Manufacturing begins when the supplier/manufacturer receives the order and is completed at the moment the component(s), assembly(ies) and related documentation are surrendered to a transportation provider.

[SOURCE: ISO 16070]

3.16

mass loss corrosion

weight loss corrosion (deprecated term)

loss of metal in areas exposed to fluids which contain water or brine and carbon dioxide (CO₂), oxygen (O₂) or other corrosive agents

Note 1 to entry: The term “weight” is commonly incorrectly used to mean mass, but this practice is deprecated.

3.17

model

SSSV equipment with unique components and operating characteristics which differentiate it from other SSSV equipment of the same type

Note 1 to entry: The same model can have any of a variety of end connections.

3.18

operating manual

publication issued by the manufacturer which contains detailed data and instructions related to the design, installation, operation and maintenance of equipment

3.19

profile

feature that is designed for the reception of a locking mechanism

3.20

proof test

test specified by the manufacturer which is performed to verify that the SSSV meets those requirements of the technical specification which are relevant to the validation testing performance

3.21

qualified part

part manufactured under a recognized quality assurance programme and, in the case of replacement, produced to meet or exceed the performance of the original part produced by the original equipment manufacturer (OEM)

Note 1 to entry: ISO 9001 is an example of a recognized quality assurance programme.

[SOURCE: ISO 10417]

3.22

redress

any activity involving the replacement of qualified parts

Note 1 to entry: See Clause 8 for more information.

3.23

repair

any activity beyond the scope of redress that includes disassembly, re-assembly, and testing with or without the replacement of parts and may include machining, welding, heat treating or other manufacturing operations, that restores the equipment to its original performance

[SOURCE: ISO 10417]

Note 1 to entry: See Clause 8 for more information.

3.24

sealing device

device preventing contact of liquid and/or gas across the interface between the lock mandrel and the landing nipple

3.25

size

relevant dimensional characteristics of the equipment as defined by the manufacturer

3.26

sour service

exposure to oilfield environments that contain H₂S and can cause cracking of materials by the mechanisms addressed in ISO 15156

Note 1 to entry: Adapted from ISO 15156-1:2001.

3.27

special feature

specific component or sub-assembly that provides a functional capability that is not validated during the validation test conducted in accordance with 6.5

3.28

subsurface safety valve

SSSV

device whose design function is to prevent uncontrolled well flow when closed

Note 1 to entry: SSSVs can be installed and retrieved by wireline or pump-down methods (wireline-retrievable) or be an integral part of the tubing string (tubing-retrievable).

3.29

subsurface safety valve equipment

SSSV equipment

subsurface safety valve, and all components that establish tolerances and/or clearances which can affect its performance or interchangeability

3.30

stress corrosion cracking

SCC

cracking of metal involving anodic processes of localized corrosion and tensile stress (residual and/or applied) in the presence of water and H₂S

Note 1 to entry: Chlorides and/or oxidants and elevated temperature can increase the susceptibility of metals to this mechanism of attack.

[SOURCE: ISO 15156-1]

3.31

stress cracking

stress corrosion cracking, or sulfide stress cracking, or both

Note 1 to entry: Adapted from NACE MR0175: Jan 2003.

3.32

stress relief

controlled heating of material to a predetermined temperature for the purpose of reducing any residual stresses

3.33

sulfide stress cracking

SSC

cracking of metal involving corrosion and tensile stress (residual and/or applied) in the presence of water and H₂S

Note 1 to entry: SSC is a form of hydrogen stress cracking (HSC) and involves embrittlement of the metal by atomic hydrogen that is produced by acid corrosion on the metal surface. Hydrogen uptake is promoted in the presence of sulfides. The atomic hydrogen can diffuse into the metal, reduce ductility and increase susceptibility to cracking. High strength metallic materials and hard weld zones are prone to SSC.

[SOURCE: ISO 15156-1]

3.34

test agency

organization which provides a test facility and administers a test program that meets the validation test requirements of this International Standard

Note 1 to entry: See Annex A for test agency requirements.

3.35

test pressure

pressure at which the equipment is tested based upon all relevant design criteria

3.36

test section

test apparatus which contains the SSSV and provides for connection to a test facility's validation test apparatus

3.37

type

SSSV equipment with unique characteristics which differentiate it from other functionally similar SSSV equipment

3.38

validation test

test performed to qualify a particular size, type and model of equipment for a specific class of service

Note 1 to entry: See Annex B for details.

3.39

working pressure

SSSV internal pressure rating, including the differential rating with the valve closed