SIST EN ISO 10427-1:2004

SLOVENSKI STANDARD
01-maj-2004
Petroleum and natural gas industries - Casing centralizers - Part 1: Bow-spring
casing centralizers (ISO 10427-1:2001)
Petroleum and natural gas industries - Casing centralizers - Part 1: Bow-spring casing
centralizers (ISO 10427-1:2001)
Erdöl- und Erdgasindustrie - Zentriereinrichtungen für Futterrohre - Teil 1: Federkorb-
Zentrierer für Futterrohre (ISO 10427-1:2001)
Industries du pétrole et du gaz naturel - Centreurs de tubes - Partie 1: Centreurs de
tubes de cuvelage (ISO 10427-1:2001)
Ta slovenski standard je istoveten z: EN ISO 10427-1:2001
ICS:
75.180.10 Oprema za raziskovanje in Exploratory and extraction
odkopavanje equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 10427-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2001
ICS 07.018.10
English version
Petroleum and natural gas industries - Casing centralizers - Part
1: Bow-spring casing centralizers (ISO 10427-1:2001)
Industries du pétrole et du gaz naturel - Centreurs de tubes Erdöl- und Erdgasindustrie - Zentriereinrichtungen für
- Partie 1: Centreurs de tubes de cuvelage (ISO 10427- Futterrohre - Teil 1: Federkorb-Zentrierer für Futterrohre
1:2001) (ISO 10427-1:2001)
This European Standard was approved by CEN on 1 October 2001.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10427-1:2001 E
worldwide for CEN national Members.

CORRECTED  2002-09-25
Foreword
This document (EN ISO 10427-1:2001) has been prepared by Technical Committee ISO/TC
67 "Materials, equipment and offshore structures for petroleum and natural gas industries" in
collaboration with Technical Committee CEN/TC 12 "Materials, equipment and offshore
structures for petroleum and natural gas industries", the secretariat of which is held by
AFNOR.
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 2002, and conflicting national
standards shall be withdrawn at the latest by April 2002.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,
Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United
Kingdom.
Endorsement notice
The text of ISO 10427-1:2001 has been approved by CEN as EN ISO 10427-1:2001 without
any modifications.
INTERNATIONAL ISO
STANDARD 10427-1
First edition
2001-10-01
Corrected version
2003-10-01
Petroleum and natural gas industries —
Equipment for well cementing —
Part 1:
Casing bow-spring centralizers
Industries du pétrole et du gaz naturel — Équipement de cimentation de
puits —
Partie 1: Centreurs de tubes de cuvelage

Reference number
ISO 10427-1:2001(E)
©
ISO 2001
ISO 10427-1:2001(E)
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ii © ISO 2001 – All rights reserved

ISO 10427-1:2001(E)
Contents Page
Foreword . iv
Introduction. v
1 Scope. 1
2 Normative reference. 1
3 Terms and definitions. 1
4 Requirements. 2
5 Testing equipment. 3
6 Procedure for starting-force and running-force tests . 5
7 Procedure for restoring-force test. 6
8 Marking. 7
Annex A (informative) Miscellaneous information . 8
Bibliography. 10

ISO 10427-1:2001(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this part of ISO 10427 may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 10427-1 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 first edition of ISO 10427-1 cancels and replaces, in part, the first edition of ISO 10427 (ISO 10427:1993),
which has been technically revised.
ISO 10427 consists of the following parts, under the general title Petroleum and natural gas industries —
Equipment for well cementing:
 Part 1: Casing bow-spring centralizers
 Part 2: Centralizer placement and stop-collar testing
 Part 3: Performance testing of cementing float equipment
Annex A of this part of ISO 10427 is for information only.
This corrected version of ISO 10427-1:2001 has undergone a title change to align with ISO 10427-2 and
ISO 10427-3.
iv © ISO 2001 – All rights reserved

ISO 10427-1:2001(E)
Introduction
This part of ISO 10427 is based on API Specification 10D, 5th edition, January 1995.
Users of this part of ISO 10427 should be aware that further or differing requirements may be needed for individual
applications. This part of ISO 10427 is not intended to inhibit a vendor from offering, or the purchaser from
accepting, alternative equipment or engineering solutions for the individual application. This may be particularly
applicable where there is innovative or developing technology. Where an alternative is offered, the vendor should
identify any variations from this part of ISO 10427 and provide details.
In this part of ISO 10427, where practical, U.S. Customary units are included in brackets after SI units for
information.
INTERNATIONAL STANDARD ISO 10427-1:2001(E)

Petroleum and natural gas industries — Equipment for well
cementing —
Part 1:
Casing bow-spring centralizers
1 Scope
This part of ISO 10427 provides minimum performance requirements, test procedures and marking requirements
for casing bow-spring centralizers for the petroleum and natural gas industries. The procedures provide verification
testing for the manufacturer’s design, materials and process specifications, and periodic testing to confirm the
consistency of product performance.
This part of ISO 10427 is not applicable to rigid or positive centralizers.
2 Normative reference
The following normative document contains provisions which, through reference in this text, constitute provisions of
this part of ISO 10427. For dated references, subsequent amendments to, or revisions of, any of these publications
do not apply. However, parties to agreements based on this part of ISO 10427 are encouraged to investigate the
possibility of applying the most recent editions of the normative documents indicated below. For undated
references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain
registers of currently valid International Standards.
ISO 11960, Petroleum and natural gas industries — Steel pipes for use as casing or tubing for wells
3 Terms and definitions
For the purposes of this part of ISO 10427, the following terms and definitions apply.
3.1
flexed
condition of a bow spring when a force three times the specified minimum restoring force (± 5 %) has been applied
to it
3.2
holding device
device employed to fix the stop collar or centralizer to the casing
EXAMPLES Set screws, nails, mechanical dogs and epoxy resins.
3.3
holding force
maximum force required to initiate slippage of a stop collar on the casing
3.4
hole size
diameter of the wellbore
ISO 10427-1:2001(E)
3.5
restoring force
force exerted by a centralizer against the casing to keep it away from the wellbore wall
NOTE Restoring force values can vary based on installation methods.
3.6
rigid centralizer
centralizer manufactured with bows that do not flex
3.7
running force
maximum force required to move a centralizer through a specified wellbore diameter
NOTE Running-force values can vary depending on the installation methods.
3.8
standoff
smallest distance between the outside diameter of the casing and the wellbore
3.9
standoff ratio
ratio of standoff to annular clearance
NOTE It is expressed as a percentage.
3.10
starting force
maximum force required to insert a centralizer into a specified wellbore diameter
NOTE Starting-force values can vary depending on the installation methods.
3.11
stop collar
device attached to the casing to prevent movement of a casing centralizer
NOTE A stop collar can be either an independent piece of equipment or integral with the centralizer.
4 Requirements
4.1 Functions of a centralizer
The purpose of a casing centralizer is to facilitate running casing to the desired depth and to assist in centring the
casing in the wellbore. One of the main objectives of centralizing a casing string is to facilitate a good cementing,
thereby isolating fluids from different zones. A bow-spring centralizer can be constructed in various ways, using
various types, shapes and quantities of bow spring.
4.2 Starting force
The maximum starting force shall be less than the weight of 1
...