ISO/FDIS 13503-8
(Main)Oil and gas industries including lower carbon energy — Completion fluids and materials — Part 8: Measurement of properties of coated proppants used in hydraulic fracturing
Oil and gas industries including lower carbon energy — Completion fluids and materials — Part 8: Measurement of properties of coated proppants used in hydraulic fracturing
Industries du pétrole et du gaz, y compris les énergies à faible teneur en carbone — Fluides de complétion et matériaux — Partie 8: Mesurage des propriétés des agents de soutènement enrobés utilisés dans la fracturation hydraulique
Le présent document fournit des modes opératoires d’essais normalisés pour l’évaluation des agents de soutènement enrobés utilisés dans les opérations de fracturation hydraulique. Il est à noter que la norme ISO 13503-8 n’est disponible que pour évaluer l’efficacité des agents de soutènement enrobés. Pour l’analyse granulométrique, le diamètre moyen, la rondeur, la sphéricité, la turbidité, la solubilité dans l’acide, la masse volumique apparente, la masse volumique absolue, la résistance à l’écrasement de l’agent de soutènement et la perte au feu de l’agent de soutènement enrobé de résine, se reporter à la norme ISO 13503-2 et pour la conductivité des agents de soutènement, se reporter à la norme ISO 13503-5. L’objectif de la norme ISO 13503-8 est de fournir une méthodologie cohérente pour les essais effectués sur les agents de soutènement enrobés utilisés dans les opérations de fracturation hydraulique.
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FINAL DRAFT
International
Standard
ISO/TC 67/SC 3
Oil and gas industries including
Secretariat: UNI
lower carbon energy — Completion
Voting begins on:
fluids and materials —
2025-03-27
Part 8:
Voting terminates on:
2025-05-22
Measurement of properties of
coated proppants used in hydraulic
fracturing
Industries du pétrole et du gaz, y compris les énergies à faible
teneur en carbone — Fluides de complétion et matériaux —
Partie 8: Mesurage des propriétés des agents de soutènement
enrobés utilisés dans la fracturation hydraulique
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WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
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INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
FINAL DRAFT
International
Standard
ISO/TC 67/SC 3
Oil and gas industries including
Secretariat: UNI
lower carbon energy — Completion
Voting begins on:
fluids and materials —
Part 8:
Voting terminates on:
Measurement of properties of
coated proppants used in hydraulic
fracturing
Industries du pétrole et du gaz, y compris les énergies à faible
teneur en carbone — Fluides de complétion et matériaux —
Partie 8: Mesurage des propriétés des agents de soutènement
enrobés utilisés dans la fracturation hydraulique
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 SUPPOR TING DOCUMENTATION.
© ISO 2025
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
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CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland Reference number
ii
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Sampling procedures for coated proppants . 1
4.1 General .1
4.2 Particle segregation .2
4.3 Equipment .2
4.4 Number of coated proppant samples — bulk .5
4.5 Sampling —bulk coated proppants . .5
4.6 Sampling — bagged coated proppants .5
4.6.1 Bags up to 50 kg each .5
4.6.2 Totes, bulk bags or super-sags weighing up to 2 000 kg each.5
5 Samples handling and storage . 6
5.1 Sample reduction . .6
5.2 Sample splitting .6
5.3 Sample record retention and storage .6
6 Performance test on precured coated proppants . 6
6.1 Dispersion rate .6
6.1.1 Purpose .6
6.1.2 Description .6
6.1.3 Equipment and materials .6
6.1.4 Sample preparation .7
6.1.5 Procedures .8
6.2 Wear loss .8
6.2.1 Purpose .8
6.2.2 Description .8
6.2.3 Equipment and materials .8
6.2.4 Procedures .9
7 Performance test on curable coated proppants . 10
7.1 Thermal tensile strength .10
7.1.1 Purpose .10
7.1.2 Description .10
7.1.3 Equipment and materials .10
7.1.4 Procedures .10
7.2 Curable melting point .11
7.2.1 Purpose .11
7.2.2 Description .11
7.2.3 Equipment and materials .11
7.2.4 Procedures . 12
7.3 Compressive strength . 12
7.3.1 Purpose . 12
7.3.2 Description . 12
7.3.3 Equipment and materials . 12
7.3.4 Procedures . 12
Annex A (Informative) Sieve calibration . 14
Annex B (Informative) The wear device and formula . 17
Annex C (Informative) Core preparation unit . 19
Annex D (Informative) Core preparation method .25
iii
Bibliography .28
iv
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)
...
Date:2025-03-04
ISO/TC 67/SC 3
Secretariat: UNI
Date: 2025-03-12
Oil and gas industries including lower carbon energy — Completion
fluids and materials — —
Part 8:
Measurement of properties of coated proppants used in hydraulic
fracturing
Industries du pétrole et du gaz, y compris les énergies à faible teneur en carbone — Fluides de complétion et
matériaux —
Partie 8: Mesurage des propriétés des agents de soutènement enrobés utilisés dans la fracturation hydraulique
FDIS stage
ISO/DIS FDIS 13503-8:2023(E2025(en)
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
Fax: +41 22 749 09 47
EmailE-mail: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO/FDIS 13508 13503-8:2025(en)
Contents
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Sampling procedures for coated proppants . 1
4.1 General . 1
4.2 Particle segregation . 2
4.3 Equipment . 2
4.4 Number of coated proppant samples — bulk . 6
4.5 Sampling —bulk coated proppants . 7
4.6 Sampling — bagged coated proppants . 7
5 Samples handling and storage . 7
5.1 Sample reduction . 7
5.2 Sample splitting . 7
5.3 Sample record retention and storage . 7
6 Performance test on precured coated proppants . 8
6.1 Dispersion rate . 8
6.2 Wear loss . 10
7 Performance test on curable coated proppants . 11
7.1 Thermal tensile strength . 11
7.2 Curable melting point . 12
7.3 Compressive strength . 13
Annex A (Informative) Sieve calibration . 15
Annex B (Informative) The wear device and formula . 18
Annex C (Informative) Core preparation unit . 20
Annex D (Informative) Core preparation method . 29
Bibliography . 32
iii
ISO/DIS FDIS 13503-8:2023(E2025(en)
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 3, Drilling and completion fluids, well cements and treatment fluids.
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/FDIS 13508 13503-8:2025(en)
Introduction
[1] [2]
This document is intended to be used together with ISO 13503-2 and ISO 13503-5. .
The procedures have been developed to improve the quality of coated proppants delivered to the well site.
They are for use in evaluating certain physical properties of the coated proppants used in hydraulic fracturing
operation. These tests enable users to compare the physical characteristics of various proppants tested under
the described conditions and to select materials useful for hydraulic fracturing operation.
This document is only available for evaluating the effectiveness of coated proppants. For sieve analysis, mean
diameter, roundness, sphericity, bulk density, absolute density, proppant crush-resistance, and loss on
ignition of resin-coated proppant, please refer to ISO 13503-2,; and for conductivity of proppants, refer to
ISO 13503-5.
v
FINAL DRAFT International Standard ISO/FDIS 13508-8:2025(en)
Oil and gas industries including lower carbon energy — Completion
fluids and materials — —
Part 8:
Measurement of properties of coated proppants used in hydraulic
fracturing
1 Scope
This document provides test procedures for evaluating coated proppants used in hydraulic fracturing
operation.
This document provides a consistent methodology for tests performed on coated proppants used in hydraulic
fracturing operations.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions 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 3.1
coated proppant
solid particle used in hydraulic fracturing that is coated with a layer of resin or other material
3.2 3.2
precured coated proppant
solid particle that can be cured or hardened during the manufacturing process
3.3 3.3
curable coated proppant
solid particle that can be cured or hardened after being placed in the fracture
4 Sampling procedures for coated proppants
4.1 General
Before any sample is taken, consider what tests will be performed, as each test require different volumes. Both
the supplier and the customer should obtain the best representative sample possible. Unless the sample is
truly representative of a total shipment or container, testing and correlation with specifications or standards
ISO/DIS FDIS 13503-8:2023(E2025(en)
is very difficult. It is unlikely that sampling/testing methods in field duplicate the producer’s system. The
standard procedures included within this document assist in obtaining representative samples. However,
there are inherent variations associated with sampling, testing equipment and the procedures that can lead to
inconsistent results. A sample that is representative of the load of load-carrying vehicle [(23 000 kg ]) or a
railcar load [(90 000 kg ]) can be an initial source of wide variation when making comparisons. All parties
should ensure uniform sampling. The customer and the supplier should agree on sampling and testing
methods or techniques.
For the best representation,the sampling should be continuous. Although many proppant suppliers utilize
automatic sampling, it is usually impractical at the job site. If sampling is conducted while unloading a
container or at the site, consideration should be given to the number or frequency of samples.
If bulk containers are filled from a flowing stream of proppant material, sampling procedures in accordance
with 4.54.5 should be applied. If bulk containers are filled using sacked proppant material, sampling
procedures in accordance with 4.64.6 should be applied.
4.2 Particle segregation
Depending on the size, shape, distribution and mechanisms involved, there is usually a certain amount of error
or variability involved in sampling due to segregation. The sampling procedures described here are the result
of much experience and are designed to minimize the effects of segregation of particles by size.
Particles, such as proppants, naturally find the path of least resistance when moved or when a force is applied.
During transfer or movement, particles of differing sizes and mass naturally are separated or segregate. The
degree of segregation depends on the mechanisms involved in the transfer or movement.
There are several forces, such as gravity, acting on a stream of particles as it flows. Within a moving stream,
fine particles drop through the voids or gaps and coarser particles move to the outside. The fine particles
migrate and usually rest close to the area where they land. The heavier, coarser particles bounce or roll much
further, stratifying the material by size.
4.3 Equipment
4.3.1 4.3.1 Box sampling device, with a 13 mm slot opening; the length of the 13 mm slot should be longer
than the thickness of the stream being sampled. The volume of the sampler should be large enough so as to
not overflow while cutting through the entire stream. A box sampling device meeting these criteria is shown
in Figure 1Figure 1.
4.3.2 4.3.2 Stand sampling device, the same number of samples should be obtained by vertically inserting
not less than 3/4 of the sampler from top,middle and bottom of the sampling bag; see Figure 2Figure 2.
4.3.3 4.3.3 Sample reducer, of appropriate size for handling sack-size samples and reducing the material
to 1/16 of the original mass; see Figure 3Figure 3.
4.3.4 4.3.4 Sample splitter, of appropriate size; see Figure 4Figure 4.
Dimensions in centimetres
Key
1 sampler body: 15,9 × 20,9 × 6,35 2 handle
3 pipe coupling 4 sample opening: 1,27
Figure 1 — Box sampling device
ISO/DIS FDIS 13503-8:2023(E2025(en)
Dimensions in millimetres
Figure2
Figure 2 — Stand sampling device
...
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