SIST EN ISO 13503-3:2022
(Main)Petroleum and natural gas industries - Completion fluids and materials - Part 3: Testing of heavy brines (ISO 13503-3:2022)
Petroleum and natural gas industries - Completion fluids and materials - Part 3: Testing of heavy brines (ISO 13503-3:2022)
This document covers the physical properties, potential contaminants and test procedures for heavy
brine fluids manufactured for use in oil and gas well drilling, completion, and workover fluids.
This document supplements API RP 13J, 5th edition (2014), the requirements of which are applicable
with the exceptions specified in this document.
This document provides more suitable method descriptions for determining the formate brines pH,
carbonate/bicarbonate concentrations and crystallization temperature at ambient pressure compared
to the methods provided by API RP 13J, 5th edition (2014).
This document is intended for the use of manufacturers, service companies and end-users of heavy
brines.
Erdöl- und Erdgasindustrie - Komplettierungsflüssigkeiten und –materialien - Teil 3: Prüfung von schweren Solen (ISO 13503-3:2022)
Industries du pétrole et du gaz naturel - Fluides de complétion et matériaux - Partie 3: Essais de saumures denses (ISO 13503-3:2022)
Le présent document couvre les propriétés physiques, les contaminants potentiels et les procédures d'essai des fluides de saumure dense fabriqués pour être utilisés comme fluides de forage, de complétion et de reconditionnement des puits de gaz et de pétrole.
Le présent document complète l'API RP 13J, 5e édition (2014), dont les exigences sont applicables sauf exception spécifiée dans le présent document.
Le présent document décrit des méthodes de détermination du pH des saumures de formiate, des concentrations de carbonate/bicarbonate et de la température de cristallisation à la pression ambiante plus adaptées que celles fournies par l'API RP 13J, 5e édition (2014).
Le présent document est destiné aux fabricants, aux sociétés de service et aux utilisateurs finaux de saumures denses.
Industrija za predelavo nafte in zemeljskega plina - Tekočine in materiali za zaključna dela - 3. del: Preskušanje težkih slanic (ISO 13503-3:2022)
Ta dokument obravnava fizikalne lastnosti, možna onesnaževala in preskusne postopke za težke slanice, proizvedene za uporabo pri vrtanju naftnih in plinskih vrtin, zaključnih delih in tekočinah za popravilo vrtin.
Ta dokument dopolnjuje 5. izdajo dokumenta API RP 13J (2014), katerega zahteve se uporabljajo za izjeme, določene v tem dokumentu.
Ta dokument podaja ustreznejše opise metod za določanje pH-vrednosti formatnih slanic, koncentracij karbonatov/bikarbonatov in temperature kristalizacije pri okoljskem tlaku v primerjavi z metodami, ki so podane v 5. izdaji dokumenta API RP 13J (2014).
Ta dokument je predviden za proizvajalce, storitvena podjetja in končne uporabnike težkih slanic.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 13503-3:2022
01-julij-2022
Nadomešča:
SIST EN ISO 13503-3:2006
SIST EN ISO 13503-3:2006/AC:2007
Industrija za predelavo nafte in zemeljskega plina - Tekočine in materiali za
zaključna dela - 3. del: Preskušanje težkih slanic (ISO 13503-3:2022)
Petroleum and natural gas industries - Completion fluids and materials - Part 3: Testing
of heavy brines (ISO 13503-3:2022)
Erdöl- und Erdgasindustrie - Komplettierungsflüssigkeiten und –materialien - Teil 3:
Prüfung von schweren Solen (ISO 13503-3:2022)
Industries du pétrole et du gaz naturel - Fluides de complétion et matériaux - Partie 3:
Essais de saumures denses (ISO 13503-3:2022)
Ta slovenski standard je istoveten z: EN ISO 13503-3:2022
ICS:
75.100 Maziva Lubricants, industrial oils and
related products
75.180.30 Oprema za merjenje Volumetric equipment and
prostornine in merjenje measurements
SIST EN ISO 13503-3:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 13503-3:2022
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SIST EN ISO 13503-3:2022
EN ISO 13503-3
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2022
EUROPÄISCHE NORM
ICS 75.100 Supersedes EN ISO 13503-3:2005
English Version
Petroleum and natural gas industries - Completion fluids
and materials - Part 3: Testing of heavy brines (ISO 13503-
3:2022)
Industries du pétrole et du gaz naturel - Fluides de Erdöl- und Erdgasindustrie -
complétion et matériaux - Partie 3: Essais de saumures Komplettierungsflüssigkeiten und -materialien - Teil 3:
denses (ISO 13503-3:2022) Prüfung von schweren Solen (ISO 13503-3:2022)
This European Standard was approved by CEN on 26 March 2022.
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, Turkey 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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13503-3:2022 E
worldwide for CEN national Members.
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SIST EN ISO 13503-3:2022
EN ISO 13503-3:2022 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 13503-3:2022
EN ISO 13503-3:2022 (E)
European foreword
This document (EN ISO 13503-3:2022) has been prepared by Technical Committee ISO/TC 67
"Materials, equipment and offshore structures for petroleum, petrochemical and natural gas industries"
in collaboration with Technical Committee CEN/TC 12 “Materials, equipment and offshore structures
for petroleum, petrochemical and natural gas industries” 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 November 2022, and conflicting national standards
shall be withdrawn at the latest by November 2022.
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 13503-3:2005.
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, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 13503-3:2022 has been approved by CEN as EN ISO 13503-3:2022 without any
modification.
3
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SIST EN ISO 13503-3:2022
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SIST EN ISO 13503-3:2022
INTERNATIONAL ISO
STANDARD 13503-3
Second edition
2022-04
Petroleum and natural gas
industries — Completion fluids and
materials —
Part 3:
Testing of heavy brines
Industries du pétrole et du gaz naturel — Fluides de complétion et
matériaux —
Partie 3: Essais de saumures denses
Reference number
ISO 13503-3:2022(E)
© ISO 2022
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SIST EN ISO 13503-3:2022
ISO 13503-3:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022
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: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
© ISO 2022 – All rights reserved
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SIST EN ISO 13503-3:2022
ISO 13503-3:2022(E)
Contents Page
Foreword .iv
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Supplements to API RP 13J, 5th edition (2014) . 2
4.1 General . 2
4.2 Method for determining iron content . 2
4.3 Method for determining carbonate and bicarbonate concentrations . 2
4.3.1 General . 2
4.3.2 Determination of carbonate concentration by titration in the titration
sample . 2
4.3.3 Calculation of carbonate fraction in the titration sample . 3
4.3.4 Calculation of bicarbonate concentration in the titration sample . 5
4.3.5 Calculation of total carbonate and bicarbonate concentration . 5
4.3.6 Calculation of carbonate and bicarbonate concentrations in the original
sample (before pH adjustment) . 5
4.4 Method for determining CT . 6
4.4.1 General . 6
4.4.2 Application and procedure . 7
4.4.3 Preparation of seeding material . 7
4.4.4 Selection of seeding material . 8
4.4.5 Determination of approximate CT . 11
4.4.6 Accurate determination of CT . 11
4.5 Method for measuring pH of formate brines . 14
iii
© ISO 2022 – All rights reserved
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SIST EN ISO 13503-3:2022
ISO 13503-3:2022(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 documents 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).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
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, Materials, equipment and offshore
structures for petroleum, petrochemical and natural gas industries, Subcommittee SC 3, Drilling and
completion fluids, well cements and treatment fluids, in collaboration with the European Committee for
Standardization (CEN) Technical Committee CEN/TC 12, Materials, equipment and offshore structures
for petroleum, petrochemical and natural gas industries, in accordance with the Agreement on technical
cooperation between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO13503-3:2005), which has been technically
revised.
This document supplements API RP 13J, 5th edition (2014).
The technical requirements of this document and API RP 13J used to be identical. In the meantime API
RP 13J has been technically revised as API RP 13J, 5th edition (2014). The purpose of this edition of
ISO 13503 is to bring this document up-to-date, by referencing the current edition of API RP 13J and
including supplementary content.
The main changes are as follows:
— the method for measuring crystallization temperature in formate brines is described in this
document and differs from the method described in API RP 13J, 5th edition (2014) due to the specific
nature of formate brines;
— the method for measuring pH in formate brines is described in this document and differs from
the method described in API RP 13J, 5th edition (2014), since the API recommended method is
unsuitable for formate brines;
— the method for determining carbonate and bicarbonate concentrations in formate brines is
th
described in this document and differs from the buffer capacity method described in API RP 13J, 5
edition (2014), since the API recommended method is unsuitable for formate brines.
A list of all parts in the ISO 13503 series can be found on the ISO website.
iv
© ISO 2022 – All rights reserved
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SIST EN ISO 13503-3:2022
ISO 13503-3:2022(E)
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.
v
© ISO 2022 – All rights reserved
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SIST EN ISO 13503-3:2022
ISO 13503-3:2022(E)
Introduction
Crystallization temperature is an important property of well construction and intervention fluids
used in cold weather conditions and/or under high pressure. API RP 13J, 5th edition (2014) defines
the crystallization temperature of a brine as the temperature at which crystals will appear in a brine
solution of a given density as it cools. The definition of the crystallization temperature of a brine
provided by API RP 13J, 5th edition (2014) is not suitable for formate brines because of prominent
supercooling and metastable phase potassium formate crystals that can form at temperatures much
lower than crystallization temperature for stable potassium formate crystals.
Formate brines, especially potassium and cesium formate brines and their blends, behave very differently
from most other brines due to strong kinetic effects that complicate crystallization temperature
measurements. The following factors complicate crystallization temperature measurements in formate
brines:
— crystallization temperatures can be very low and can be lower than the cooling capability of the
measuring equipment;
— a significant amount of supercooling;
— existence of metastable potassium formate crystals that form in potassium-rich formate brines.
th
API RP 13J, 5 edition (2014) recommends measuring pH of a concentrated brine on a neat sample,
despite multiple reasons indicating this approach is wrong, including Debye-Hückel and pH buffers
(standards) formulas being well outside of its validity range. This causes inconsistent, ambiguous, and
meaningless pH results. Diluting a brine sample before a pH measurement eradicates these issues.
th
API RP 13J, 5 edition (2014) recommends measuring buffer capacity of a concentrated brine by a
standard carbonate titration to measure the combined carbonate and hydroxide buffering capacity,
followed by titration to a randomly selected ‘target pH’ of 7,5 (measured in undiluted brine). By
selecting such a low target pH (corresponding to a pH of around 6 in diluted brine) the second titration
endpoint is at the part of the titration curve masked by the formate/formic acid equilibrium and is
unsuitable for determining the bicarbonate concentration, resulting in inconsistent and ambiguous
bicarbonate concentration results. These issues can be eradicated by using a method compromising a
pH measurement, a possible pH adjustment, and a phenolphthalein titration. Carbonate/bicarbonate
concentrations are calculated based on this data.
vi
© ISO 2022 – All rights reserved
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SIST EN ISO 13503-3:2022
INTERNATIONAL STANDARD ISO 13503-3:2022(E)
Petroleum and natural gas industries — Completion fluids
and materials —
Part 3:
Testing of heavy brines
1 Scope
This document covers the physical properties, potential contaminants and test procedures for heavy
brine fluids manufactured for use in oil and gas well drilling, completion, and workover fluids.
This document supplements API RP 13J, 5th edition (2014), the requirements of which are applicable
with the exceptions specified in this document.
This document provides more suitable method descriptions for determining the formate brines pH,
carbonate/bicarbonate concentrations and crystallization temperature at ambient pressure compared
to the methods provided by API RP 13J, 5th edition (2014).
This document is intended for the use of manufacturers, service companies and end-users of heavy
brines.
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.
API RP 13J, 5th edition (2014), Testing of heavy brines
3 Terms and definitions
For the purposes of this document, the terms and definitions given in API RP 13J, 5th edition (2014) 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
crystallization temperature
CT
temperature at which crystals and liquid exists in stable equilibrium
Note 1 to entry: This definition takes precedence over the description of Crystallization Temperature in API RP
13 J, 5th edition (2014), 7.1.3.
1
© ISO 2022 – All rights reserved
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SIST EN ISO 13503-3:2022
ISO 13503-3:2022(E)
4 Supplements to API RP 13J, 5th edition (2014)
4.1 General
The requirements specified in API RP 13J, 5th edition (2014) shall apply, with the exceptions specified
in 4.2 to 4.5.
4.2 Method for determining iron content
The requirements specified in API RP 13J, 5th edition (2014), Clause 11 shall apply with the following
exception:
The method for determining iron content shall not be used on formate brines.
4.3 Method for determining carbonate and bicarbonate concentrations
4.3.1 General
th
The requirements specified in API RP 13J, 5 edition (2014), Clause 13 shall apply with the following
exception:
— The method for determining buffer capacity shall not be used in formate brines.
— Carbonate and bicarbonate determination method described in 4.3.2 to 4.3.6 shall be applied.
Carbonate and bicarbonate concentrations can be measured in all formate single-salt and blended
brines:
— sodium formate brine;
— potassium formate brine;
— cesium formate brine;
— sodium/potassium formate brine blends;
— potassium/cesium formate brine blends.
4.3.2 Determination of carbonate concentration by titration in the titration sample
The following steps shall be executed:
a) If the sample is contaminated with so
...
SLOVENSKI STANDARD
oSIST prEN ISO 13503-3:2021
01-junij-2021
Industrija za predelavo nafte in zemeljskega plina - Tekočine in materiali za
zaključna dela - 3. del: Preskušanje težkih slanic (ISO/DIS 13503-3:2021)
Petroleum and natural gas industries - Completion fluids and materials - Part 3: Testing
of heavy brines (ISO/DIS 13503-3:2021)
Erdöl- und Erdgasindustrie - Komplettierungsflüssigkeiten und –materialien - Teil 3:
Prüfung von schweren Solen (ISO/DIS 13503-3:2021)
Industries du pétrole et du gaz naturel - Fluides de complétion et matériaux - Partie 3:
Essais de saumures denses (ISO/DIS 13503-3:2021)
Ta slovenski standard je istoveten z: prEN ISO 13503-3
ICS:
75.100 Maziva Lubricants, industrial oils and
related products
75.180.30 Oprema za merjenje Volumetric equipment and
prostornine in merjenje measurements
oSIST prEN ISO 13503-3:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN ISO 13503-3:2021
---------------------- Page: 2 ----------------------
oSIST prEN ISO 13503-3:2021
DRAFT INTERNATIONAL STANDARD
ISO/DIS 13503-3
ISO/TC 67/SC 3 Secretariat: SN
Voting begins on: Voting terminates on:
2021-04-14 2021-07-07
Petroleum and natural gas industries — Completion fluids
and materials —
Part 3:
Testing of heavy brines
Industries du pétrole et du gaz naturel — Fluides de complétion et matériaux —
Partie 3: Essais de saumures denses
ICS: 75.100
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 13503-3:2021(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2021
---------------------- Page: 3 ----------------------
oSIST prEN ISO 13503-3:2021
ISO/DIS 13503-3:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021
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: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST prEN ISO 13503-3:2021
ISO/DIS 13503-3:2021(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, and abbreviations . 1
4 Supplements to API RP 13J, 5th edition (2014) . 2
4.1 General . 2
4.2 Method for determining iron content . 2
4.3 Method for determining buffering capacity . 2
4.4 Method for determining CT . . 2
4.4.1 General. 2
4.4.2 Application and procedure . 2
4.4.3 Preparation of seeding material . 3
4.4.4 Selection of seeding material . 4
4.4.5 Determination of approximate CT . 6
4.4.6 Accurate determination of CT . 6
4.5 Method for measuring pH of formate brines . 9
© ISO 2021 – All rights reserved iii
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oSIST prEN ISO 13503-3:2021
ISO/DIS 13503-3:2021(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 documents 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).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
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 Materials, equipment and offshore
structures for petroleum, petrochemical and natural gas industries, Subcommittee SC 3, Drilling, and
completion fluids and well cements.
This second edition cancels and replaces the first edition (ISO13503- 3: 2005), which has been technically
revised.
This document supplements API RP 13J, 5th edition (2014).
The technical requirements of this part of ISO 13503 and API RP 13J used to be identical. In the
meantime, API RP 13J has been technically revised as API RP 13J, 5th edition (2014). The purpose of
this revision is to bring this part of ISO 13503 up-to-date, by referencing the current edition of API RP
13J, and including supplementary content.
The main changes compared to the previous edition are as follows:
— The main content of the document is removed to avoid duplication of content in API RP 13J, 5th
edition (2014). Only content supplemental to API RP 13J, 5th edition (2014) is now present in this
document.
— The method for measuring crystallization temperature in formate brines is described in this
document and differs from the method described in API RP 13J, 5th edition (2014) due to the specific
nature of formate brines.
— The method for measuring pH in formate brines is described in this document and differs from
the method described in API RP 13J, 5th edition (2014), since the API recommended method is
unsuitable for formate brines.
A list of all parts in the ISO 13503 series can be found on the ISO website.
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.
iv © ISO 2021 – All rights reserved
---------------------- Page: 6 ----------------------
oSIST prEN ISO 13503-3:2021
ISO/DIS 13503-3:2021(E)
Introduction
Crystallization temperature is an important property of well construction and intervention fluids
used in cold weather conditions and/or under high pressure. API RP 13J, 5th edition (2014) defines
the crystallization temperature of a brine as the temperature at which crystals will appear in a brine
solution of a given density as it cools. The definition of the crystallization temperature of a brine
provided by API RP 13J, 5th edition (2014) is not suitable for formate brines because of prominent
supercooling and metastable phase potassium formate crystals that can form at temperatures
much lower than crystallization temperature for stable potassium formate crystals. A more suitable
definition of crystallization temperature is therefore “the highest temperature at which crystals and
liquid can exist in stable equilibrium”.
Formate brines, especially potassium and cesium formate brines and their blends, behave very
differently from most other brines due to strong kinetic effects that complicate crystallization
temperature measurements. The following factors complicate crystallization temperature
measurements in formate brines:
— crystallization temperatures can be very low and can be lower than the cooling capability of the
measuring equipment;
— a significant amount of supercooling;
— existence of metastable potassium formate crystals that form in potassium-rich formate brines.
© ISO 2021 – All rights reserved v
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oSIST prEN ISO 13503-3:2021
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oSIST prEN ISO 13503-3:2021
DRAFT INTERNATIONAL STANDARD ISO/DIS 13503-3:2021(E)
Petroleum and natural gas industries — Completion fluids
and materials —
Part 3:
Testing of heavy brines
1 Scope
This document covers the physical properties, potential contaminants and test procedures for heavy
brine fluids manufactured for use in oil and gas well drilling, completion, and workover fluids.
This document generally refers to API RP 13J, 5th edition (2014) for description of methods for assessing
the performance and physical characteristics of heavy brines for use in field operations.
This document supplements API RP 13J, 5th edition (2014), the requirements of which are applicable
with the exceptions specified in this document. This document provides more suitable method
descriptions for determining the formate brines pH and crystallization temperature at ambient
pressure compared to the methods provided by API RP 13J, 5th edition (2014).
This document is intended for the use of manufacturers, service companies and end-users of heavy brines.
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.
API RP 13J, 5th edition (2014), Testing of heavy brines
3 Terms, definitions, and abbreviations
For the purposes of this document, the terms and definitions given in API RP 13J, 5th edition (2014) and
the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
crystallization temperature
CT
temperature at which crystals and liquid exists in stable equilibrium
Note 1 to entry: The definition provided by API RP 13 J, 5th edition (2014) is not valid for formate brines
© ISO 2021 – All
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