SIST EN ISO 13628-9:2007

SLOVENSKI STANDARD
SIST EN ISO 13628-9:2007
01-maj-2007
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Petroleum and natural gas industries - Design and operation of subsea production
systems - Part 9: Remotely Operated Tool (ROT) intervention systems (ISO 13628-
9:2000)
Erdöl- und Erdgasindustrie - Auslegung und Betrieb von Unterwasser-
Produktionssystemen - Teil 9: ROT-Systeme (ISO 13628-9:2000)
Industries du pétrole et du gaz naturel - Conception et exploitation des systemes de
production immergés - Partie 9: Systemes d'intervention utilisant des dispositifs a
commande a distance (ROT) (ISO 13628-9:2000)
Ta slovenski standard je istoveten z: EN ISO 13628-9:2006
ICS:
75.180.10 Oprema za raziskovanje in Exploratory and extraction
odkopavanje equipment
SIST EN ISO 13628-9:2007 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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EUROPEAN STANDARD
EN ISO 13628-9
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2006
ICS 75.180.10

English Version
Petroleum and natural gas industries - Design and operation of
subsea production systems - Part 9: Remotely Operated Tool
(ROT) intervention systems (ISO 13628-9:2000)
Industries du pétrole et du gaz naturel - Conception et Erdöl- und Erdgasindustrie - Auslegung und Betrieb von
exploitation des systèmes de production immergés - Partie Unterwasser-Produktionssystemen - Teil 9: ROT-Systeme
9: Systèmes d'intervention utilisant des dispositifs à (ISO 13628-9:2000)
commande à distance (ROT) (ISO 13628-9:2000)
This European Standard was approved by CEN on 13 November 2006.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
Slovakia, Slovenia, 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
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13628-9:2006: E
worldwide for CEN national Members.

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EN ISO 13628-9:2006 (E)






Foreword



The text of ISO 13628-9:2000 has been prepared by Technical Committee ISO/TC 67
"Materials, equipment and offshore structures for petroleum and natural gas industries” of the
International Organization for Standardization (ISO) and has been taken over as EN ISO 13628-
9:2006 by Technical Committee CEN/TC 12 "Materials, equipment and offshore structures for
petroleum, petrochemical 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 June 2007, and conflicting national
standards shall be withdrawn at the latest by June 2007.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,
Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.



Endorsement notice

The text of ISO 13628-9:2000 has been approved by CEN as EN ISO 13628-9:2006 without any
modifications.

2

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INTERNATIONAL ISO
STANDARD 13628-9
First edition
2000-06-15
Petroleum and natural gas industries —
Design and operation of subsea production
systems —
Part 9:
Remotely Operated Tool (ROT) intervention
systems
Industries du pétrole et du gaz naturel — Conception et exploitation des
systèmes de production immergés —
Partie 9: Systèmes d'intervention utilisant des dispositifs à commande à
distance (ROT)
Reference number
ISO 13628-9:2000(E)
©
ISO 2000

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ISO 13628-9:2000(E)
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ii © ISO 2000 – All rights reserved

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ISO 13628-9:2000(E)
Contents Page
Foreword.iv
Introduction.v
1 Scope .1
2 Terms, definitions and abbreviated terms .1
2.1 Terms and definitions .1
2.2 Abbreviated terms .2
3 System selection.3
3.1 General.3
3.2 Deck handling equipment .5
3.3 Intervention control system (ICS) .5
3.4 Deployment/landing equipment .7
3.5 Tools for primary intervention tasks .7
4 Functional requirements and recommendations .8
4.1 General.8
4.2 Deployment and landing requirements and recommendations .9
4.3 Surface equipment .10
4.4 Control system requirements and recommendations .12
4.5 Tie-in operations.15
4.6 Module replacement .18
5 Test requirements and recommendations .19
6 Interfaces.19
Bibliography.24
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ISO 13628-9:2000(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 13628 may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 13628-9 was prepared by Technical Committee ISO/TC 67, Materials, equipment and
offshore structures for petroleum and natural gas industries, Subcommittee SC 4, Drilling and production
equipment.
ISO 13628 consists of the following parts, under the general title Petroleum and natural gas industries — Design
and operation of subsea production systems:
� Part 1: General requirements and recommendations
� Part 2: Flexible pipe systems for subsea and marine applications
� Part 3: Through flowline (TFL) systems
� Part 4: Subsea wellhead and tree equipment
� Part 5: Subsea control umbilicals
� Part 6: Subsea production control systems
� Part 7: Workover/completion riser systems
� Part 8: Remotely Operated Vehicle (ROV) interfaces on subsea production systems
� Part 9: Remotely Operated Tool (ROT) intervention systems
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ISO 13628-9:2000(E)
Introduction
This part of ISO 13628 is considered to be closely related to ISO 13628-1 and ISO 13628-8. ISO 13628-1 provides
general requirements and overall recommendations for development of complete subsea production systems for
the petroleum and natural gas industries, from design to decommissioning, and gives a description of how the ROT
intervention systems relate to the total subsea production system.
The objective of subsea intervention systems, including vessel and deck handling equipment, is to facilitate safe
and efficient intervention on subsea installations.
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INTERNATIONAL STANDARD ISO 13628-9:2000(E)
Petroleum and natural gas industries — Design and operation of
subsea production systems —
Part 9:
Remotely Operated Tool (ROT) intervention systems
1 Scope
This part of ISO 13628 provides functional requirements and recommendations for ROT intervention systems and
interfacing equipment on subsea production systems for the petroleum and natural gas industries.
This part of ISO 13628 does not cover manned intervention and ROV-based intervention systems (e.g. for tie-in of
sealines and module replacement). Vertical wellbore intervention, internal flowline inspection, tree running and tree
running equipment are also excluded from this part of ISO 13628.
2 Terms, definitions and abbreviated terms
For the purposes of this part of ISO 13628, the following terms, definitions and abbreviated terms apply.
2.1 Terms and definitions
2.1.1
subsea intervention
all work carried out subsea
2.1.2
primary intervention
all work carried out during the scheduled intervention task
2.1.3
ROT system
dedicated, unmanned, subsea tools used for remote installation or module replacement tasks that require lift
capacity beyond that of free-swimming ROV systems
NOTE The ROT system comprises wire-suspended tools with control system and support-handling system for performing
dedicated subsea intervention tasks. They are usually deployed on liftwires or a combined liftwire/umbilical. Lateral guidance
may be via guidewires, dedicated thrusters or ROV assistance.
2.1.4
deployment system
all equipment involved in the launch and recovery of the ROT system
2.1.5
heave-compensated system
system that limits the effect of vertical vessel motion on the deployed ROT system
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ISO 13628-9:2000(E)
2.1.6
skid system
storage, transportation, lifting and testing frames to facilitate movement of the ROT systems and the modules and
components to be replaced or installed
NOTE Skids are used in combination with a skidding system.
2.1.7
sealines
all pipelines, flowlines, umbilicals and cables installed on the seabed
2.1.8
termination head
part of the PICS interfacing with the end of the sealine
2.1.9
pull-in head
part of the pull-in system acting as attachment point for the end of the pull-in wire
2.2 Abbreviated terms
CB centre of buoyancy
CF connection function
CG centre of gravity
CT connection tool
FAT factory acceptance test
HPU hydraulic power unit
ICS intervention control system
ID internal diameter
IP ingress protection
LCC life cycle cost
MQC multi quick connector
NAS National Aerospace Standard Institute
PGB permanent guide base
PICS pull-in and connection system
PIF pull-in function
PIT pull-in tool
ROT remotely operated tool
ROV remotely operated vehicle
SPS subsea production system
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ISO 13628-9:2000(E)
SWL safe working load
WOCS workover control system
3 System selection
3.1 General
The design, configuration and operation of the ROT intervention system impacts directly on the LCC for the entire
SPS. In order to obtain an SPS design providing safe and cost-effective intervention operations, it is important to
obtain a closed loop between SPS design and intervention system design. See Figure 1.
An ROT intervention system typically comprises the following:
a) ROTs for dedicated intervention tasks,
b) deck handling equipment,
c) ICS,
d) deployment/landing equipment,
e) ROV spread interfaced with ROT systems.
An illustration of the main features of an ROT intervention system and associated equipment is shown in Figure 2.
The breakdown of the ROT intervention system into sub-elements and components as presented in this part of
ISO 13628 should not pose limitations on the selection of new intervention concepts whose functionality and
reliability can be documented.
Configurational options for the ROT intervention system and interfacing equipment, such as intervention vessel and
ROV systems when used, are shown in Figure 3.
ROT intervention systems shall be evaluated for all phases of an intervention operation, which typically are:
� mobilization (specific issues at the location in question),
� deck handling and preparation,
� launch, descent and landing,
� intervention task,
� testing,
� complementary tasks,
� retrieval,
� demobilization,
� contingency.
During the evaluation, consideration shall be given to reasonably foreseeable misuse of the ROT intervention
system.
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ISO 13628-9:2000(E)
Figure 1 — Interaction of LCC
Figure 2 — Principal sketch of an ROT intervention system
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ISO 13628-9:2000(E)
Figure 3 — Illustration of interfaces between the intervention vessel, the ROT system
and, when used, the ROV system
3.2 Deck handling equipment
Deck handling equipment and launching techniques shall be selected to ensure that a wide range of vessels can
be used. Flexibility shall be provided without compromising safety and reliability of the work, both on surface and
subsea. Main issues are:
� means of moving intervention equipment on deck (skid systems vs. use of vessel cranes);
� means of deploying and landing ROT systems (winches and simple mobile A-frames vs. use of complex,
purpose-made heave-compensated systems);
� means of installing on and removing from the intervention vessel.
The selection of equipment shall be dictated by the nature of the intervention task (e.g. tie-in operation, module
replacement), environmental considerations affecting the operation and time available to carry out the required
operation.
3.3 Intervention control system (ICS)
The ICS shall be designed for control and monitoring of
a) ROT function testing on deck,
b) ROT status during running, if required,
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ISO 13628-9:2000(E)
c) ROT functions during the intervention task.
These control functions may be provided either through
� ROT function testing on deck,
� a dedicated system for the ROT,
� an ROV control system, or
� a combined ROT/ROV system.
Main issues with respect to selection of the ICS configuration are
� complexity of the subsea work,
� cost and manning for a dedicated control system,
� level of modifications to a standard ROV control system,
� flexibility of the ROV during the subsea work,
� reliability and suitability of the subsystems within an ROV spread.
See Figure 4, which is meant to highlight the interrelationship between ROTs and ROVs and related interface
requirements.
Figure 4 — Illustration of possible ICS options for ROT systems
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ISO 13628-9:2000(E)
3.4 Deployment/landing equipment
Selection of running philosophy is determined by
a) availability requirements (logistics and mobilization time for equipment),
b) field-specific parameters (water depth, wave, current and seabed conditions),
c) vessel requirements,
d) intervention task-specific parameters (planned vs. unplanned operation, complexity, frequency and subsea
interface considerations),
Figure 5 shows two options available for horizontal positioning control.
Figure 5 — Illustration of possible deployment and landing options for ROT systems
3.5 Tools for primary intervention tasks
a) The following considerations should be taken into account for tie-in operations:
� parameters related to the dedicated sealine;
� operational issues with respect to the vessel, e.g. simultaneous operations between subsea intervention and
drilling or completion activities;
� environmental aspects, including e.g. water depths, current conditions and seabed conditions;
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ISO 13628-9:2000(E)
� limitations subjected to the alternative tie-in methods, e.g. winch capacity or length of pull-in rope;
� SPS field layout.
b) The following considerations should be taken into account for module replacement:
� operational issues with respect to the vessel, e.g. simultaneous operations between subsea intervention and
drilling or completion activities;
� environmental aspects, including e.g. water depths, current conditions and seabed conditions;
� access at the subsea location;
� replacement in one or two tooling missions;
� mass and dimensions of module to be replaced.
4 Functional requirements and recommendations
4.1 General
This subclause contains general functional requirements and recommendations for the elements within the various
options of ROT intervention systems and interfacing equipment.
a) The ROT intervention system shall be designed to be as small, simple, reliable and robust as possible, to
ensure safety of personnel and to prevent damage to the intervention system, the SPS and/or the
environment. No single failure should result in reduced safety for the involved personnel, or cause damage to
involved equipment and/or the environment (consider redundancy in order to minimize the probability of
failure).
b) The ROT functional requirements shall reflect its multiple use over the design life of the SPS.
c) The ROT intervention system shall be designed to allow for safe and easy operation, maintenance, repair and
replacement of components.
d) Operations of all functions in the ROT intervention system shall be optimized with regard to duration.
e) Priority should be given to reduce the time required for mobilization/demobilization onboard the intervention
vessel.
f) Functionality and operability of new ROT intervention concepts shall be documented in design and by testing
under realistic conditions.
g) All intervention tasks shall be possible to suspend in a safe manner. It shall be possible to resume a task
suspended due to equipment failure or adverse weather conditions.
h) All ROT operations should be fully reversible at any stage.
i) All tool functions, which upon failure may prevent retrieval of the ROT system to surface, shall have override
features. These shall include release from both the permanently installed subsea systems as well as from
sealines and replaceable components.
j) In case of a vessel drift-off, a weak-link or safe disconnection/release method shall be installed between the
ROT system and the liftwire/umbilical. The ROT locking mechanism against the SPS should ensure that the
ROT is not locked to the structure before the weak-link is established.
k) A weak-link or a fail-safe system should be included on all physical connections between ROT and ROV.
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ISO 13628-9:2000(E)
l) All elements in the ROT intervention system shall be certified for an SWL to suit the maximum expected load
conditions during testing, transport and offshore operations. Mass of the module to be handled by the ROT
should be included.
m) The ROT intervention system shall be designed for temperatures in the range 0 �Cto50 �C(32 �F to 122 �F).
For operation and storage temperatures below 2 �C(35,6 �F), critical components shall be tested and
documented for temperatures down to –18 �C(–0,4 �F).
n) The ROT system should be designed for long-term storage.
o) All equipment included in the ROT system shall be designed to withstand vibrations during transportation and
operation in accordance with applicable regional regulations and actual conditions.
p) The ROT systems should allow operations from vessels such as mobile offshore drilling units simultaneously
with drilling and completion activities. The following should be considered:
1) relative offset between launch position and landing area;
2) stack-up height, including height of the ROT system, the component/module to be installed and the
umbilical sheave arrangement;
3) mass of the ROT system, including the component/module, shall be minimized for handling purposes.
q) The ROT system should be designed to be run through a moonpool or over the side, both from a semi-
submersible or from a monohull vessel.
r) The ROT intervention system should enable deployment of modules in any vessel heading relative to the
subsea system.
s) ROT designs should give consideration to ROV operations during ROT use.
t) The ROT system shall be well balanced, with the resulting CG point directly below the handling cable
attachment point prior to pick-up.
u) The ROT shall be designed for efficient launching on guidewires.
v) Cutting-loops, or similar solutions, shall be included for hydraulic functions with override possibilities in order to
enable cutting of the loops with an ROV and hence prevent pressure lock in the respective hydraulic function.
w) Sensitive components or items which may be damaged during running, landing, operation, ROV involvement
or interactions with wires, shall be protected against worst-case load condition.
x) Active hydraulic or electric components should not be left subsea in an activated mode.
y) Snagging points for guidewires, liftwires and umbilicals shall be avoided on the ROT system.
z) All tool functions should have visual subsea status and position indicators visible from ROV, clearly indicating
the respective function status. Operations passing through several discrete steps, shall clearly identify the
various stages of the operations.
aa) Provisions for emergency lifting should be included on all ROT systems.
4.2 Deployment and landing requirements and recommendations
This subclause contains functional requirements and recommendations for the ROT system during the deployment
and landing phases of the intervention task.
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ISO 13628-9:2000(E)
a) ROT operations in which sensitive components, as part of the subsea system, are involved shall be carried out
in a two-step sequence. The ROT shall be landed and sufficiently secured prior to manipulation of sensitive
components, e.g. hydraulic lines.
b) The number of lines from the surface to the subsea work area should be minimized, to reduce the possibility of
entanglement.
c) When an ROT system is deployed in a guidewireless operation, lateral and rotational control of the ROT
system is required while entering into the subsea area in which sensitive components are exposed at the same
level as the ROT.
d) If heave compensation on the ROT system liftwire is not specified, the ROT shall be designed for a vertical
motion while on guidepost(s) and during landing. The design shall include a combination of crane-top motion
amplitude, winch speed and the vessel period. Any potential amplification effects of crane-top motion down to
the ROT shall be included.
e) The guidewire system on-surface should allow asymmetrical adjustment of the distance between the
guidewires relative to the lifting point.
f) The guidewire winch(es) should be capable of installing replaceable guideposts.
g) The guidefunnels on the ROT shall enable simple and efficient entering and securing of the guidewires and
eliminate trapping of the wires.
h) In order to achieve safe operation, the ROT and the transportation skid should enable entering on tensioned
guidewires.
i) Sufficient running clearance between the ROT and the nearest obstructing element shall be ensured. Minimum
1,0 m (3,3 ft) clearance while on guidewires and 0,2 m (0,65 ft) while on guideposts should be provided.
Cursor systems, guidecones and guideposts should be secured to avoid movements above the tolerance limits
[1,0 m (3,3 ft) topside and 0,2 m (0,65 ft) subsea].
j) When guidewires are used, an emergency release system for the guidewires shall be included.
4.3 Surface equipment
4.3.1 General
The surface equipment system shall allow safe and efficient deck handling of the ROT system. Need for use of
deck handling cranes should be minimized. The following general requirements and recommendations apply.
a) A skidding system should be used for transporting the ROT system and/or the components between working
deck and launching position, to ensure safe handling. Functional requirements for tool skid systems are given
in 6.3.2.
b) Where personnel are expected to climb onto a module or module stack-up for handling, inspection or
maintenance, design considerations should be given to the placement of footrests, handholds, temporary
gratings and attachment points for safety lines and fall-arrest systems.
c) Design and operation of all electrical systems on surface shall be in accordance with applicable regulations
(equipment voltage and frequency shall be considered). Special attention should be given to equipment for use
in explosion-hazard areas.
d) The lifting equipment shall be designed and documented in accordance with applicable regional regulations.
e) Design loads for lifting equipment shall include hydrody
...