EN ISO 15551:2023

Petroleum and natural gas industries - Drilling and production equipment - Electric submersible pump systems for artificial lift (ISO 15551:2023)

This document specifies requirements for the design, design verification and validation, manufacturing and data control, performance ratings, functional evaluations, handling and storage of tubing-deployed electrical submersible pump (ESP) systems. Additionally, this document provides requirements for assembled ESP system.
This document is applicable to those ESP related components meeting the definition of centrifugal pumps, including gas handling devices, discharge heads, seal chamber sections, intake systems, mechanical gas separators, asynchronous 3 phase - 2 pole induction motors (herein motor), shaft couplings, downhole power cables (herein power cables), motor lead extension, and pothead. Components supplied under the requirements of this document exclude previously used subcomponents, except where the use of such subcomponents is as defined in this document (Clause 9).
This document addresses design validation performance rating requirements by component (see Annex A), requirements for determining ratings as an assembled system (see Annex B), functional evaluation: single component (see Annex C) and cable reference information (see Annex D).
This document addresses functional evaluation guidelines for assembled ESP systems, establishing recommended operating range (ROR) of the ESP system (see Annex F), example user/purchaser ESP functional specification form (see Annex G), considerations for the use of 3-phase low and medium voltage adjustable speed drives for ESP applications (see Annex H), analysis after ESP use (see Annex I), downhole monitoring of ESP assembly operation (see Annex J), information on permanent magnet motors for ESP applications (see Annex K) and users guide (see Annex L).
This document also includes a user guide that offers a high-level process workflow when applying this document.
This document does not apply to: wireline and coiled tubing-deployed ESP systems, motor shrouds and pump shrouds, electric penetrators and feed-through systems, cable clamps and banding, centralizers, intake screens, passive gas separators, by-pass tools, check and bleeder valves, component adaptors, capillary lines, electric surface control equipment, downhole permanent magnet motors and non-conventionally configured ESP systems such as inverted systems. This document does not apply to Repair and redress equipment requirements.

Erdöl- und Erdgasindustrie - Bohr- und Förderausrüstung - Elektrische Tauchpumpen zur Förderung (ISO 15551:2023)

Industries du pétrole et du gaz naturel - Équipement de forage et de production - Systèmes de pompes submersibles électriques pour relevage artificiel (ISO 15551:2023)

Le présent document spécifie les exigences relatives à la conception, à la vérification et à la validation de la conception, à la fabrication et au contrôle des données, aux niveaux de performance, aux évaluations fonctionnelles, à la manipulation et au stockage des systèmes de pompes submersibles électriques (ESP) à tube déployé. En outre, le présent document fournit des exigences pour les systèmes ESP assemblés.
Le présent document s'applique aux composants de l'ESP répondant à la définition des pompes centrifuges, y compris les dispositifs de traitement des gaz, les têtes de décharge, les sections de la chambre d'étanchéité, les systèmes d'admission, les séparateurs mécaniques de gaz, les moteurs à induction asynchrones triphasés à deux pôles (ci-après les «moteurs»), les accouplements d'arbres, les câbles d'alimentation de fond (ci-après les «câbles d'alimentation»), l'extension de puissance du moteur et la tête de câble. Les composants fournis conformément aux exigences du présent document excluent les sous-composants utilisés précédemment, sauf lorsque l'utilisation de ces sous-composants est conforme à la définition du présent document (Article 9).
Le présent document traite des exigences de niveau de performance de validation de la conception par composant (voir Annexe A), des exigences de détermination des valeurs nominales en tant que système assemblé (voir Annexe B), de l'évaluation fonctionnelle: composant seul (voir Annexe C) et des informations de référence sur les câbles (voir Annexe D).
Le présent document traite des lignes directrices d'évaluation fonctionnelle des systèmes ESP assemblés, de l'établissement de la plage de fonctionnement recommandée (ROR) du système ESP (voir Annexe F), d'un exemple de formulaire de spécification fonctionnelle ESP utilisateur/acheteur (voir Annexe G), des considérations relatives à l'utilisation de systèmes d'entraînement à vitesse variable triphasés à basse et moyenne tension pour les applications ESP (voir Annexe H), de l'analyse après utilisation de l'ESP (voir Annexe I), de la surveillance de fond du fonctionnement de l'ensemble ESP (voir Annexe J), des informations sur les moteurs à aimant permanent pour les applications ESP (voir Annexe K) et des guides d'utilisation (voir Annexe L).
Le présent document comprend également un guide de l'utilisateur qui offre un flux de travail de haut niveau dans le cadre de l'application du présent document.
Le présent document ne s'applique pas aux systèmes ESP à câble métallique ou à tube enroulé déployés, aux enveloppes de moteur et de pompe, aux pénétrateurs électriques et aux systèmes de traversée, aux serre-câbles et aux bandes de câbles, aux centralisateurs, aux écrans d'admission, aux séparateurs de gaz passifs, aux outils de dérivation, aux clapets anti-retour et de purge, aux adaptateurs de composants, aux lignes capillaires, aux équipements électriques de commande en surface, aux moteurs à aimant permanent de fond de puits et aux systèmes ESP à configuration non conventionnelle tels que les systèmes inversés. Le présent document ne s'applique pas aux exigences relatives aux équipements de réparation et de remise en état.

Industrija za predelavo nafte in zemeljskega plina - Proizvodna oprema za vrtanje - Električne potopne črpalke za prečrpavanje na površino (ISO 15551:2023)

Standard ISO 15551-1:2015 določa zahteve za zasnovo, preverjanje in potrjevanje zasnove, proizvodnjo in nadzor podatkov, ocene učinkovitosti, funkcionalno vrednotenje, ravnanje in shranjevanje sistemov električne potopne črpalke s cevmi, kot je opredeljeno v tem dokumentu. Ta del standarda ISO 15551 se uporablja za tiste komponente, ki ustrezajo opredelitvi centrifugalnih črpalk, vključno z napravami za ravnanje s plini, glavami za sproščanje, predeli zaprte komore, dovodnimi sistemi, mehanskimi separatorji plina, indukcijskimi motorji (v tem dokumentu motorji), grednimi vezmi, napajalnimi priključki motorjev, razdelilniki in napajalnimi kabli, kot je opredeljeno v tem dokumentu. Komponente, dobavljene v skladu z zahtevami tega dela standarda ISO 15551, ne zajemajo predhodno uporabljenih podkomponent. Poleg tega ta mednarodni standard podaja zahteve za sestavljene sisteme električne potopne črpalke.
Standard ISO 15551-1:2015 vključuje normativne dodatke, ki obravnavajo zahteve za ocenjevanje učinkovitosti validacije zasnove po sestavnih delih, zahteve za določanje ocen kot sestavljenega sistema, funkcionalno vrednotenje: referenčne informacije o komponentah in kablih.
Standard ISO 15551-1:2015 vključuje informativne priloge, ki obravnavajo smernice za funkcionalno vrednotenje sestavljenih sistemov električne potopne črpalke, določajo priporočljivo delovno območje (ROR) sistema električne potopne črpalke, primer obrazca s funkcionalno specifikacijo ESP za uporabnika/kupca, zahteve za uporabo pogonov s 3-fazno nizko in srednjo napetostjo ter prilagodljivo hitrostjo za sisteme električne potopne črpalke, analizo po uporabi električne potopne črpalke, spremljanje vrtine za delovanje sestava električne potopne črpalke in informacije o motorjih s trajnim magnetom za možnosti uporabe električne potopne črpalke.
Oprema, ki ni zajeta v tem delu standarda ISO 15551, vključuje sisteme električne potopne črpalke z žičnimi in navitimi cevmi, varovala motorja in črpalke, električne prebojne naprave, dovodne sisteme, kabelske spojke in trakove, centralizatorje, dovodne rešetke, pasivne separatorje plina, orodje za obvod, kontrolne in odzračevalne ventile, adapterje komponent, kapilarne vode, električno površinsko opremo, motorje s trajnim magnetom za vrtine in nekonvencionalno konfigurirane sisteme električne potopne črpalke, kot so obrnjeni sistemi. Ta del standarda ISO 15551 ne zajema zahtev glede opreme za popravilo in nadomestilo.
Terminologije, ki se uporabljajo v tem delu standarda ISO 15551, so: »sestav ESP« za sistem izdelkov, povezanih v delujoči stroj, »komponenta« za posamezne izdelke, kot so črpalke ali predeli zaprte komore, in »podkomponenta« za posamezne dele ali podsestave, ki se uporabljajo v konstrukciji posamezne komponente.

General Information

• Status: Published
• Publication Date: 03-Oct-2023
• ICS: 75.180.10 - Exploratory, drilling and extraction equipment
• Technical Committee: CEN/TC 12 - Materials, equipment and offshore structures for petroleum and natural gas industries
• Drafting Committee: CEN/TC 12 - Materials, equipment and offshore structures for petroleum and natural gas industries
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 04-Oct-2023
• Completion Date: 04-Oct-2023
• Ref Project: SIST EN ISO 15551:2023 - Petroleum and natural gas industries - Drilling and production equipment - Electric submersible pump systems for artificial lift (ISO 15551:2023)

Relations

• Replaces: EN ISO 15551-1:2015 - Petroleum and natural gas industries - Drilling and production equipment - Part 1: Electric submersible pump systems for artificial lift (ISO 15551-1:2015)
• Effective Date: 18-Jan-2023

Overview

EN ISO 15551:2023 (adopted by CEN) defines requirements for electric submersible pump (ESP) systems used for artificial lift in the petroleum and natural gas industries. It covers design, design verification and validation, manufacturing and data control, performance ratings, functional evaluations, handling and storage for tubing‑deployed ESP systems and assembled ESP systems. The standard applies to centrifugal-pump‑type ESP components such as gas handling devices, discharge heads, seal chamber sections, intakes, mechanical gas separators, asynchronous 3‑phase 2‑pole induction motors, shaft couplings, downhole power cables, motor lead extensions and potheads. It supersedes EN ISO 15551‑1:2015 and is aligned with ISO 15551:2023.

Key topics and technical requirements

• Design and documentation
  • Design criteria, materials, dimensional information and design change control.
  • Requirements for design verification and design validation at component and assembled‑system levels.
• Performance ratings and testing
  • Component‑level performance rating requirements (Annex A).
  • Assembled system rating methodology and functional evaluation (Annex B, C).
• Functional evaluation and operating ranges
  • Guidelines for component functional evaluation and assembled ESP functional tests.
  • Recommended operating range (ROR) determination for ESP systems (Annex F).
• Specialized component guidance
  • Requirements for motors, seal chambers, gas separators, intakes, discharge heads, and power/motor lead extension cables.
  • Cable reference information and downhole monitoring considerations (Annex D, J).
• Ancillary guidance
  • User/purchaser functional specification template (Annex G).
  • Considerations for 3‑phase low and medium voltage adjustable speed drives (Annex H).
  • Analysis after ESP use, permanent magnet motor information, and a user guide for implementation (Annexes I, K, L).
• Exclusions
  • Wireline/coiled‑tubing ESPs, motor/pump shrouds, electric penetrators/feed‑throughs, clamps, centralizers, passive separators, and repair/redress equipment.

Applications

• Selection, design and procurement of tubing‑deployed ESP systems for oil and gas wells.
• Defining performance guarantees and acceptance tests for suppliers and OEMs.
• Basis for manufacturing quality control, factory testing, and field commissioning of ESP systems.
• Reference for operators evaluating ESP reliability, downhole monitoring data and post‑run analysis.

Who should use this standard

• Oil & gas operators, completion and production engineers
• ESP manufacturers and OEMs
• Procurement and quality assurance teams
• Test laboratories, certification bodies and service companies
• Control system and drive integrators working with adjustable speed drives for ESPs

Related standards and context

• EN ISO 15551:2023 is the CEN‑endorsed version of ISO 15551:2023 and replaces EN ISO 15551‑1:2015. It was prepared by ISO/TC 67 and CEN/TC 12 and should be used alongside applicable national and industry standards for well completion, electrical safety and material specifications.

Keywords: EN ISO 15551:2023, electric submersible pump systems, ESP, artificial lift, performance ratings, design validation, downhole motors, power cables.

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2023
Industrija za predelavo nafte in zemeljskega plina - Proizvodna oprema za vrtanje -
Električne potopne črpalke za prečrpavanje na površino (ISO 15551:2023)
Petroleum and natural gas industries - Drilling and production equipment - Electric
submersible pump systems for artificial lift (ISO 15551:2023)
Erdöl- und Erdgasindustrie - Bohr- und Förderausrüstung - Elektrische Tauchpumpen
zur Förderung (ISO 15551:2023)
Industries du pétrole et du gaz naturel - Équipement de forage et de production -
Systèmes de pompes submersibles électriques pour relevage artificiel (ISO 15551:2023)
Ta slovenski standard je istoveten z: EN ISO 15551:2023
ICS:
23.080 Črpalke Pumps
75.180.10 Oprema za raziskovanje, Exploratory, drilling and
vrtanje in odkopavanje extraction equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 15551
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2023
EUROPÄISCHE NORM
ICS 75.180.10 Supersedes EN ISO 15551-1:2015
English Version
Petroleum and natural gas industries - Drilling and
production equipment - Electric submersible pump
systems for artificial lift (ISO 15551:2023)
Industries du pétrole et du gaz naturel - Équipement de Erdöl- und Erdgasindustrie - Bohr- und
forage et de production - Systèmes de pompes Förderausrüstung - Elektrische Tauchpumpen zur
submersibles électriques pour relevage artificiel (ISO Förderung (ISO 15551:2023)
15551:2023)
This European Standard was approved by CEN on 10 September 2023.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 15551:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 15551:2023) has been prepared by Technical Committee ISO/TC 67 "Oil and
gas industries including lower carbon energy" in collaboration with Technical Committee CEN/TC 12
“Oil and gas industries including lower carbon energy” the secretariat of which is held by NEN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by April 2024, and conflicting national standards shall be
withdrawn at the latest by April 2024.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 15551-1:2015.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 15551:2023 has been approved by CEN as EN ISO 15551:2023 without any modification.

INTERNATIONAL ISO
STANDARD 15551
First edition
2023-09
Petroleum and natural gas
industries — Drilling and production
equipment — Electric submersible
pump systems for artificial lift
Industries du pétrole et du gaz naturel — Équipement de forage et
de production — Systèmes de pompes submersibles électriques pour
relevage artificiel
Reference number
ISO 15551:2023(E)
ISO 15551:2023(E)
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 15551:2023(E)
Contents Page
Foreword . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols and abbreviated terms.16
5 Functional specification .18
5.1 General . 18
5.2 Component type . 19
5.3 Functional requirements . . 19
5.3.1 General . 19
5.3.2 Application parameters. 19
5.3.3 Environmental compatibility . 21
5.3.4 Compatibility with related well equipment and services .22
5.4 User/purchaser selections .23
5.4.1 General .23
5.4.2 Design validation .23
5.4.3 Component functional evaluation . 23
5.4.4 Quality grades . . 24
5.4.5 Shipping, handling and storage . 24
5.4.6 Operator’s manual . . 24
5.4.7 Subcomponent condition classifications in manufacture of components . 24
5.4.8 Additional documentation . 24
6 Technical specification .24
6.1 General . 24
6.2 Design criteria . 25
6.2.1 General . 25
6.2.2 Design documentation .25
6.2.3 Materials . 25
6.2.4 Dimensional information .29
6.2.5 Component and assembled system design verification .29
6.2.6 Component design validation .29
6.2.7 Component functional evaluation requirements .29
6.2.8 Assembled system functional evaluation .29
6.2.9 Design changes .30
6.3 Technical specification — All components .30
6.3.1 Technical characteristics .30
6.3.2 Performance rating .30
6.4 Technical specification — Bolt-on discharge .30
6.4.1 General .30
6.4.2 Technical characteristics for the discharge .30
6.4.3 Performance ratings . 31
6.4.4 Scaling of design validation . 31
6.5 Technical specification — Pump and gas handler . 31
6.5.1 General . 31
6.5.2 Technical characteristics for the pump and gas handler . 31
6.5.3 Performance ratings . 31
6.5.4 Scaling of design validation . 31
6.6 Technical specification — Bolt-on intake . 31
6.6.1 General . 31
6.6.2 Technical characteristics for the bolt-on intake . 32
6.6.3 Performance ratings . 32
6.6.4 Scaling of design validation . 32
iii
ISO 15551:2023(E)
6.7 Technical specification — Mechanical gas separators . 32
6.7.1 General . 32
6.7.2 Technical characteristics . 32
6.7.3 Performance ratings . 32
6.7.4 Scaling of design validation . 32
6.8 Technical specification — Seal chamber sections . 32
6.8.1 General . 32
6.8.2 Technical characteristics . 32
6.8.3 Performance ratings .33
6.8.4 Scaling of design validation . 33
6.9 Technical specification — Motors . 33
6.9.1 General . 33
6.9.2 Technical characteristics . 33
6.9.3 Performance ratings .33
6.9.4 Scaling of design validation .34
6.10 Technical specifications — Power and motor lead extension cable .34
6.10.1 General .34
6.10.2 Technical characteristics .34
6.10.3 Performance ratings .34
6.10.4 Scaling of design validation .34
6.11 Technical specifications — Pothead .34
6.11.1 General .34
6.11.2 Technical characteristics .34
6.11.3 Performance ratings . 35
6.11.4 Scaling of design validation . 35
6.12 Assembled ESP system – Additional requirements . 35
6.12.1 General . 35
6.12.2 Technical characteristics . 35
6.12.3 System capabilities . 35
6.13 Technical specification response guideline – ESP components .36
7 Supplier's/manufacturer's requirements .37
7.1 General . 37
7.2 Documented information . 37
7.2.1 General . 37
7.2.2 Delivery documentation . 37
7.2.3 Operator’s manual . .38
7.2.4 Certificate of conformance .38
7.2.5 Component data sheet .38
7.3 Component identification. 42
7.3.1 Permanent identification . 42
7.3.2 Semi-permanent identification . 42
7.4 Quality . 42
7.4.1 General . 42
7.4.2 Quality grade requirements . 42
7.5 Raw materials .44
7.6 Additional processes applied to components .44
7.6.1 Documentation.44
7.6.2 Coatings and surface treatments .44
7.6.3 Welding .44
7.7 Traceability . 45
7.8 Calibration systems . 45
7.9 Examination and inspection . 45
7.9.1 General . 45
7.9.2 Weld .46
7.9.3 Component and subcomponent dimensional inspection .46
7.9.4 Construction features .48
7.10 Manufacturing non-conformance .48
7.11 Component functional testing .48
iv
ISO 15551:2023(E)
8 Shipping, handling and storage .48
8.1 General .48
8.2 Storage .49
9 Subcomponent condition classifications in manufacture of components .49
Annex A (normative) Design validation performance rating requirements by component.50
Annex B (normative) Requirements for determining performance capabilities as an
assembled system .80
Annex C (normative) Functional evaluation: single component .83
Annex D (normative) Cable reference information .91
Annex E (informative) Functional evaluation guideline — Assembled ESP system .98
Annex F (informative) Establishing recommended operating range of ESP system . 103
Annex G (informative) Example of user's/purchaser's ESP functional specification form. 105
Annex H (informative) Considerations for use of three-phase low and medium voltage
adjustable speed drives for ESP applications . 109
Annex I (informative) Analysis after ESP use . 115
Annex J (informative) Downhole monitoring of ESP assembly . 127
Annex K (informative) Information on permanent magnet motors for ESP applications . 129
Annex L (informative) User guide . 131
Bibliography . 135
v
ISO 15551:2023(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO document should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use
of (a) patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed
patent rights in respect thereof. As of the date of publication of this document, ISO had not received
notice of (a) patent(s) which may be required to implement this document. However, implementers are
cautioned that this may not represent the latest information, which may be obtained from the patent
database available at www.iso.org/patents. ISO shall not be held responsible for identifying any or all
such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 67, Oil and gas industries including lower
carbon energy, Subcommittee SC 4, Drilling, production and injection equipment, in collaboration with the
European Committee for Standardization (CEN) Technical Committee CEN/TC 12, Oil and gas industries
including lower carbon energy, in accordance with the Agreement on technical cooperation between ISO
and CEN (Vienna Agreement).
This first edition cancels and replaces ISO 15551-1:2015, which has been technically revised.
The main changes are as follows:
— the relationship between the design verification/validation activities and the functional
specification/technical specification has been revised. In this document, the design verification/
validation activities have been tied to a “basis of design” rather than to the functional specification/
technical specification;
— Annex E has been augmented to incorporate additional details, guidelines and options for completing
functional evaluation of assembled systems;
— Annex L is a “user’s guide”, which has been added to this document to provide a simplified view of
the practical workflow of the document.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
vi
INTERNATIONAL STANDARD ISO 15551:2023(E)
Petroleum and natural gas industries — Drilling and
production equipment — Electric submersible pump
systems for artificial lift
1 Scope
This document specifies requirements for the design, design verification and validation, manufacturing
and data control, performance ratings, functional evaluations, handling and storage of tubing-deployed
electrical submersible pump (ESP) systems. Additionally, this document provides requirements for
assembled ESP system.
This document is applicable to those ESP related components meeting the definition of centrifugal pumps,
including gas handling devices, discharge heads, seal chamber sections, intake systems, mechanical gas
separators, asynchronous 3 phase - 2 pole induction motors (herein motor), shaft couplings, downhole
power cables (herein power cables), motor lead extension, and pothead. Components supplied under
the requirements of this document exclude previously used subcomponents, except where the use of
such subcomponents is as defined in this document (Clause 9).
This document addresses design validation performance rating requirements by component (see
Annex A), requirements for determining ratings as an assembled system (see Annex B), functional
evaluation: single component (see Annex C) and cable reference information (see Annex D).
This document addresses functional evaluation guidelines for assembled ESP systems, establishing
recommended operating range (ROR) of the ESP system (see Annex F), example user/purchaser ESP
functional specification form (see Annex G), considerations for the use of 3-phase low and medium
voltage adjustable speed drives for ESP applications (see Annex H), analysis after ESP use (see Annex I),
downhole monitoring of ESP assembly operation (see Annex J), information on permanent magnet
motors for ESP applications (see Annex K) and users guide (see Annex L).
This document also includes a user guide that offers a high-level process workflow when applying this
document.
This document does not apply to: wireline and coiled tubing-deployed ESP systems, motor shrouds and
pump shrouds, electric penetrators and feed-through systems, cable clamps and banding, centralizers,
intake screens, passive gas separators, by-pass tools, check and bleeder valves, component adaptors,
capillary lines, electric surface control equipment, downhole permanent magnet motors and non-
conventionally configured ESP systems such as inverted systems. This document does not apply to
Repair and redress equipment requirements.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 60228, Conductors of insulated cables
ISO 9000, Quality management systems — Fundamentals and vocabulary
ISO 9712, Non-destructive testing — Qualification and certification of NDT personnel
API RP 11S2, Electric Submersible Pump Testing
API RP 11S6, Recommended Practice for Testing of Electrical Submersible Pump Cable Systems
ISO 15551:2023(E)
API RP 11S7, Recommended Practice of Application and Testing of Electric Submersible Pump Seal Chamber
Section
API RP 11S8, Practice on Electric Submersible Pump System Vibrations
ASTM B3, Standard Specification for Soft or Annealed Copper Wire
ASTM B8, Standard Specification for Concentric-Lay-Stranded Copper Conductors, Hard, Medium-Hard, or
Soft
ASTM B33, Standard Specification for Tin Coated Soft or Annealed Copper Wire for Electrical Purposes
ASTM B189, Standard Specification for Lead-Coated and Lead-Alloy-Coated Soft Copper Wire for Electrical
Purposes
ASTM B193, Standard Test Method for Resistivity of Electrical Conductor Materials
ASTM B258, Standard Specification for Standard Nominal Diameters and Cross-Sectional Areas of AWG
Sizes of Solid Round Wires Used as Electrical Conductors
ASTM B496, Standard Specification for Compact-Round Concentric-Lay-Stranded Copper Conductors
ASTM D471, Standard Test Method for Rubber Property — Effect of Liquids
ASTM E8, Standard Test Methods for Tension Testing of Metallic Materials
ANSI/NEMA WC 53, Standard Test Methods for Extruded Dielectric Power, Control, Instrumentation, and
Portable Cables for Test
ASTM D877, ASTM D877M, Standard Test Method for Dielectric Breakdown Voltage of Insulating Liquids
Using Disk Electrodes
ASTM D1816, Standard Test Method for Dielectric Breakdown Voltage of Insulating Liquids Using VDE
Electrodes
IEEE Std 1018, Recommended Practice for Specifying Electric Submersible Pump Cable - Ethylene-Propylene
Rubber Insulation
IEEE Std 1019, Recommended Practice for Specifying Electric Submersible Pump Cable-Polypropylene
Insulation
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 9000 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
adapter
device used to connect components that are not directly compatible
3.2
adjustable speed drive
device that controls an electric motor’s speed by manipulating both the output voltage and the power
frequency being supplied to the motor
ISO 15551:2023(E)
3.3
ampacity
maximum current that can pass through a power cable without exceeding its temperature limit for a
specific operating environment
3.4
ampacity coefficient
temperature rise of the power cable divided by the square of the amperage for a specific operating
environment
3.5
armor
outer covering to the power cable that can provide protection from mechanical damage and provides
mechanical constraint against swelling or expansion of underlying materials on exposure to well fluids
3.6
assembled electrical submersible pump system
assembled ESP system
assembly of electric submersible pump downhole equipment which includes some or all components
such as centrifugal pumps, gas handling devices, discharge head, seal chamber sections, intake system,
mechanical gas separators, motors, shaft couplings, power cable, motor lead extension, and pothead
3.7
auxiliary equipment
equipment or components that are typically selected and/or installed by the user/purchaser
EXAMPLE Cable protectors, motor shrouds, by-pass tools and electrical penetrators.
3.8
axial flow stage
type of stage with inlet and exit flow path essentially parallel to the shaft axis
3.9
positive seal element
flexible subcomponent of a seal chamber section that functions as a positive barrier that isolates the
wellbore production fluid from the motor fluid, commonly referred to as bag, bladder or bellows.
3.10
positive seal element chamber
chamber that houses the positive seal element
3.11
barrier
subcomponent of an electrical submersible pump power cable that can be applied over the insulated
conductors and provides fluid protection, hoop strength or both
3.12
best efficiency point
BEP
pump performance values at the flow rate where the pump efficiency is highest
3.13
bleeder valve
valve placed above a check valve for the purpose of reducing pressure or draining the fluid from within
the production tubing
3.14
braid
supplementary layer of material used to provide mechanical performance characteristics to the power
cable system such as hoop strength for gas decompression
ISO 15551:2023(E)
3.15
bubble point
pressure at which gas begins to break out of under-saturated oil/fluid and form a free gas phase
3.16
by-pass tool
device that is installed into the wellbore along with the electrical submersible pump (ESP) assembly
that divides the tubing system to permit the installation of additional tubing string parallel to the ESP
3.17
cable band
metal band that is used to secure electrical submersible pump power cable to production tubing
3.18
cable clamp
device, usually of rigid material, for strengthening or supporting power cable to production tubing
3.19
capillary line
independent tubing string commonly used for hydraulic control of safety valves and sliding sleeves or
for chemical injection
3.20
casing
pipe extending from the surface and intended to line the walls of a drilled well
3.21
centralizer
device used to keep the electrical submersible pump assembly or other downhole equipment in the
centre of the tubing, casing or wellbore
3.22
centrifugal pump
component of an electrical submersible pump system that uses rotating impeller(s) to impart kinetic
energy (velocity) by centrifugal force to a fluid and stationary diffusers to convert the kinetic energy to
potential energy (pressure)
3.23
chamber
subcomponent of the seal chamber section
3.24
check valve
device that allows one-directional flow of fluid when a differential pressure exists
3.25
coefficient of determination
statistic used to determine the strength of a fit between a mathematical model and a set of observed
data values
3.26
coiled tubing
pipe typically supplied and installed in one continuous length and wound onto a reel or spool
3.27
common hardware
hardware that does not require traceability and is included as part of an electrical submersible pump
component
EXAMPLE Bolts, washers, screws, and snap rings.
ISO 15551:2023(E)
3.28
compact stranded
electrical conductor configuration in which a multiple-strand conductor has been compacted to reduce
its circumference while maintaining conductor area
3.29
component
individual part of an assembly
EXAMPLE Pumps (including gas handling devices), discharge heads, seal chamber sections, intake systems,
mechanical gas separators, induction motors, shaft couplings, downhole cables, motor lead extensions, and
potheads.
3.30
compression pump
configuration where the impeller is fixed to the shaft to prevent axial movement
3.31
conductor
subcomponent of the power cable that functions to conduct electrical power
3.32
conductor shield
layer adjacent to the conductor to distribute voltage stress evenly over the surface of the conductor
3.33
configuration
component designation that identifies the end connection designs for attaching additional components
in series
EXAMPLE Upper tandem, lower tandem, middle/centre tandem, and single tandem.
3.34
contraction capacity
volume that a chamber or set of parallel chambers can draw in due to temperature and pressure cycles
without allowing wellbore fluid ingress through the chamber or causing damage
3.35
coupling
device that connects the shafts of electrical submersible pump components
3.36
conductor resistance test
method for determining the cable conductor resistance value
3.37
deployment method
method used to deploy the electrical submersible pump downhole equipment to its setting location
3.38
design basis
documented set of conditions, needs, and requirements taken into account by the supplier/manufacturer
in designing and establishing performance ratings of a facility or product
3.39
design validation
process of proving a design by testing to demonstrate conformity of the product to design requirements
and performance ratings
SIST EN I
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