oSIST prEN ISO 17078-1:2026

• Abstract:

  ISO 17078:2004 provides requirements for side-pocket mandrels used in the petroleum and natural gas industry. This part of ISO 17078 includes specifying, selecting, designing, manufacturing, quality control, testing, and preparation for shipping of side-pocket mandrels.; This part of ISO 17078:2004 does not address nor include requirements for end connections between the side-pocket mandrels and the well conduit. The installation and retrieval of side-pocket mandrels is outside the scope of this part of ISO 17078:2004. Additionally, this part of ISO 17078:2004 does not include specifications for centre-set mandrels, or mandrels that employ or support tubing-retrievable flow control devices.; This part of ISO 17078:2004 does not include gas-lift or any other flow-control valves or devices, latches, and/or associated wire line equipment that can or cannot be covered in other ISO specifications.; The side-pocket mandrels to which this part of ISO 17078:2004 refers are independent devices that can accept installation of flow-control or other devices down-hole.

• Status: Not Published
• Public Enquiry End Date: 29-Nov-2026
• ICS: 75.180.10 - Exploratory, drilling and extraction equipment
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 05-Oct-2026
• Due Date: 22-Feb-2027
• Ref Project: prEN ISO 17078-1 - Oil and gas industries including lower carbon energy - Drilling, production and injection equipment - Part 1: Side-pocket mandrels (ISO/DIS 17078-1:2026)

• Revises: SIST EN ISO 17078-1:2005 - Petroleum and natural gas industries - Drilling and production equipment - Part 1: Side-pocket mandrels (ISO 17078-1:2004)
• Effective Date: 18-Sep-2024
• Revises: SIST EN ISO 17078-1:2005/A1:2010 - Petroleum and natural gas industries - Drilling and production equipment - Part 1: Side-pocket mandrels - Amendment 1 (ISO 17078-1:2004/Amd 1:2010)
• Effective Date: 18-Sep-2024

oSIST prEN ISO 17078-1:2026 is the Slovenian standard for side-pocket mandrels used in oil and gas industries including lower carbon energy, aligned with ISO/DIS 17078-1:2026. Published by SIST, it specifies requirements for specifying, selecting, designing, manufacturing, quality control, testing, and preparing side-pocket mandrels for shipping in petroleum and natural gas service.

What does oSIST prEN ISO 17078-1:2026 specify?

oSIST prEN ISO 17078-1:2026 covers side-pocket mandrels for the petroleum and natural gas industry, including standard designs and high pressure and/or high temperature (HPHT) equipment. It is organized into scope, normative references, terms and definitions, and clause 4, which gives supplements to API Spec 19G1, plus a bibliography.

The document treats side-pocket mandrels as independent devices that can accept installation of flow-control or other devices down-hole. It excludes end connections to the well conduit, installation and retrieval, center-set mandrels, mandrels that support tubing-retrievable flow control devices, side-pocket mandrels that incorporate non-metallic pressure-containment materials, and gas-lift or other valves, latches, and associated wireline equipment.

What are the key requirements of oSIST prEN ISO 17078-1:2026?

oSIST prEN ISO 17078-1:2026 mainly adds supplements to API Spec 19G1, 2nd edition (2019). The practical effect is that users apply API Spec 19G1, then apply the added material, testing, and packaging requirements in clause 4 where they are relevant.

• Clause 4.1 says the requirements of API Spec 19G1 apply, except where clause 4.2 adds exceptions. It also states that ISO 9000 is used instead of API Q1. In practice, this ties the document to the API side-pocket mandrel requirements while using ISO quality-management vocabulary.
• Clauses 4.2.1 and 4.2.2 add material-selection requirements for CO2 gas injection and gas production wells when the CO2 mole fraction exceeds 10 % and the CO2 partial pressure is at least 1 MPa. In those cases, the selected materials shall comply with ISO 17348, so the well environment has to be checked before material choice is frozen.
• Clause 4.2.3 adds verification of surface hardening. The assessment includes surface hardness, microstructural characteristics, and surface-hardened layer thickness, and the thickness is measured in accordance with ISO 18203. In practice, heat-treated parts need documented inspection of the hardened layer, not only general hardness control.
• Clause 4.2.4 and 7.8.6 add packaging requirements. Side-pocket mandrels shall be packed to prevent impact and collision damage to critical components during transport, and any special packaging requirements shall be agreed in writing between supplier/manufacturer and user/purchaser. This makes shipping protection part of product control.
• The scope includes standard side-pocket mandrel designs and HPHT equipment rated greater than 103,43 MPa and/or greater than 177 °C, as proffered by API 1PER15K-1. For project specification, that means the pressure and temperature rating has to be checked against the stated HPHT thresholds.
• The scope also defines the product boundary as a mandrel that can accept down-hole flow-control or other devices. This matters because the document does not govern the valves, latches, or wireline tools that may be installed in or with the mandrel.

What terms does oSIST prEN ISO 17078-1:2026 define?

• Side-pocket mandrel - An independent device that can accept installation of flow-control or other devices down-hole.
• Sour service - Exposure to oilfield environments containing enough H2S to cause cracking of materials by specific mechanisms.
• HPHT - High pressure and/or high temperature equipment, here identified as above 103,43 MPa and/or above 177 °C.
• API Spec 19G1 - The base side-pocket mandrel specification that this document supplements.
• ISO 9000 - The quality management fundamentals and vocabulary standard used here instead of API Q1.
• ISO 17348 - The material selection standard for high CO2 casing, tubing and downhole equipment.
• ISO 18203 - The steel standard used to determine the thickness of surface-hardened layers.

Who uses oSIST prEN ISO 17078-1:2026?

Manufacturers and suppliers use oSIST prEN ISO 17078-1:2026 to design, make, inspect, test, and package side-pocket mandrels. Quality managers and inspection teams use it to decide what has to be verified before shipment, especially for material selection, surface hardening, and packaging.

Purchasers, engineers, and operators in petroleum and natural gas projects use it when specifying mandrels for standard wells, CO2 service, or HPHT wells. It is also relevant to users who need to confirm that the mandrel is only one part of a larger down-hole system and that separate requirements may apply to valves, latches, and wireline equipment.

What changed in oSIST prEN ISO 17078-1:2026 from the previous edition?

oSIST prEN ISO 17078-1:2026 cancels and replaces ISO 17078-1:2004 and incorporates ISO 17078-1:2004/Amd 1:2010. The foreword states four main changes: the document was fully reorganized, supplementary requirements for material selection in high CO2-containing environments were added, supplementary requirements for testing the thickness of the surface-hardened layer were added, and supplementary requirements for tool packaging were added.

Which standards are used with oSIST prEN ISO 17078-1:2026?

Standard	What it contributes
API Spec 19G1, 2nd edition (2019)	Base requirements for side-pocket mandrels, supplemented by this document
ISO 9000	Quality management fundamentals and vocabulary, used instead of API Q1
ISO 17348	Material selection requirements for high CO2 environments
ISO 18203	Method for determining surface-hardened layer thickness
API TR 1PER15K-1	Bibliographic support for verification and validation of HPHT equipment

What does the oSIST prEN ISO 17078-1:2026 document contain?

The document is concentrated in a short technical structure: scope, normative references, terms and definitions, and clause 4 with general requirements and technical specification supplements. Its main technical content is the set of additions to API Spec 19G1 for high CO2 material selection, surface-hardened layer verification, and packaging.

It also includes one formal term definition and a bibliography that points to API TR 1PER15K-1. For users, the document functions as a focused supplement for design, qualification, inspection, and shipping of side-pocket mandrels.

SLOVENSKI STANDARD
01-november-2026
Naftna in plinska industrija, vključno z nizkoogljično energijo - Vrtalna in
proizvodna oprema - 1. del: Vpenjalna os s stranskimi žepi (ISO/DIS 17078-1:2026)
Oil and gas industries including lower carbon energy - Drilling, production and injection
equipment - Part 1: Side-pocket mandrels (ISO/DIS 17078-1:2026)
Erdöl- und Erdgasindustrie - Bohr- und Fördereinrichtungen - Teil 1: Gasliftventile
(ISO/DIS 17078-1:2026)
Industries du pétrole et du gaz, y compris les énergies à faible teneur en carbone -
Équipement de forage, de production et d'injection - Partie 1: Raccords à poche latérale
(ISO/DIS 17078-1:2026)
Ta slovenski standard je istoveten z: prEN ISO 17078-1
ICS:
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.

DRAFT
International
Standard
ISO/DIS 17078-1
ISO/TC 67/SC 4
Oil and gas industries including
Secretariat: ANSI
lower carbon energy — Drilling,
Voting begins on:
production and injection
2026-09-17
equipment —
Voting terminates on:
2026-12-10
Part 1:
Side-pocket mandrels
ICS: 75.180.10
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
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Reference number
ISO/DIS 17078-1:2026(en)
DRAFT
ISO/DIS 17078-1:2026(en)
International
Standard
ISO/DIS 17078-1
ISO/TC 67/SC 4
Oil and gas industries including
Secretariat: ANSI
lower carbon energy — Drilling,
Voting begins on:
production and injection
equipment —
Voting terminates on:
Part 1:
Side-pocket mandrels
ICS: 75.180.10
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document has not been edited by the ISO Central Secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2026
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
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BE CONSIDERED IN THE LIGHT OF THEIR
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Published in Switzerland Reference number
ISO/DIS 17078-1:2026(en)
ii
ISO/DIS 17078-1:2026(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Supplements to API Spec 19G1, 2nd edition (2019) . 2
4.1 General requirements .2
4.2 Technical specification .2
Bibliography . 4

iii
ISO/DIS 17078-1:2026(en)
Foreword
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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 coope
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