API RP 17M:2004 pdf download

API RP 17M:2004 pdf download.Recommended Practice on Remotely Operated Tool(ROT) Intervention systems.
limitations subjected to the alternative he-in methods, e.g. winch capacity or length of pull-in rope; SPS field layout.
b) The following considerations sbould 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 arid robust as possle, 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 lot 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 mobilizationdemobilization 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 Irom sealines and replaceable components,
J) In case of a vessel drift-off, a weak-link or safe disconnectionrelease method shall be installed between the ROT system and the Iiflwireiumbilical, 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 ROy.
f) Electrical equipment exposed to harsh environments shall be water-ingress-protected, with a minimum IP rating.
g) The equipment shall be supplied complete with all necessary interlace piping, instwmentation, cabling and hose bumpers in order to avoid on.site installation, except for connecting the units.
h) All control cables, piping, umbilical terminations, connectors, hoses and associated equipment shall be supported and protected adequately to prevent damage or contamination during storage, testing, equipment handling and operation.
i) All lines, cables, fittings arid connectors shall be dearly mariced to enable easy identification arid connection. Multiconnectors should be evaluated to reduce hook-up time.
) The same type of fitting should be used for the same pressure classes.
k) The number of different types of fitting should be minimized throughout the system.
4.4.2 Surface control system
The following requirements and recommendations are relevant for a purpose-built surface control container for the subsea intervention system.
a) The surface control equipment shall provide for safe, effective and reliable control and monitoring of all ROT functions, including testing.
b) The surface control system should include audiovisual contact between the ROT surface control unit and the ROV surface control unit.
C) The surface control system should provide facilities for monitoring applicable surface activities and for communication to crane/winch.
d) The surface control system should include facilities for computerized storage and printout of relevant feedback data from the various operations.
e) The surface control system should provide facilities for video recording of ROT system operations, including ROV operations for complementary work.
f) The total number of monitors should reflect the maximum number of functions to be monitored simultaneously.
g) The layout of the surface control unit should allow easy access to all components for maintenance and repair.
h) The surface control unit should enable deck-positioning flexibility, e.g. location of doors, safety exits, control panels, cable inletsioutlets. etc.
i) The surface control unit should have an operator-friendly design. Control panels shall be easily readable with logical and understandable markings.
j) The surface control unit shall have proper lighting, ventilation, temperature control and noise protection.
4,4.3 Surface/subsea communication
The following requirements and recommendations apply to an ROT intervention system with a dedicated umbilical. The umbilical can either be clamped to a lift wire or armoured to provide lifting capability as an integrated solution.
a) The umbilical shall contain necessary power cables, fibre optic lines, twisted pair signal cables and coaxial cables for power and signal transmission. Minimum one each spare power, fibre. coax and twisted pair shall be Included.