SIST EN ISO 13624-1:2010
(Main)Petroleum and natural gas industries - Drilling and production equipment - Part 1: Design and operation of marine drilling riser equipment (ISO 13624-1:2009)
Petroleum and natural gas industries - Drilling and production equipment - Part 1: Design and operation of marine drilling riser equipment (ISO 13624-1:2009)
This part of ISO 13624 pertains to the design, selection, operation and maintenance of marine riser systems for floating drilling operations. Its purpose is to serve as a reference for designers, for those who select system components, and for those who use and maintain this equipment. It relies on basic engineering principles and the accumulated experience of offshore operators, contractors, and manufacturers. The marine drilling riser is best viewed as a system. It is necessary that designers, contractors, and operators realize that the individual components are recommended and selected in a manner suited to the overall performance of that system. For the purposes of this part of ISO 13624, a marine drilling riser system includes the tensioner system and all equipment between the top connection of the upper flex/ball joint and the bottom of wellhead conductor outer casing. It specifically excludes the diverter. Also, the applicability of this part of ISO 13624 is limited to operations with a subsea BOP stack deployed at the seafloor. Clauses 1 through 7 of this part of ISO 13624 are directly applicable to most floating drilling operations. Special situations are addressed in 8.1 and 8.4 dealing with deep-water drilling and collapse. The special considerations required for guidelineless drilling are addressed in 8.2. In addition, 8.3 and 8.5 address operations in cold-weather conditions and H2S considerations. It is important that all riser primary-load-path components addressed in this part of ISO 13624 be consistent with the load classifications specified in ISO 13625.
Erdöl- und Erdgasindustrien - Bohr- und Förderanlagen - Auslegung und Betrieb von Bohrförderanlagen auf See (ISO 13624-1:2009)
Industries du pétrole et du gaz naturel - Équipement de forage et de production - Partie 1: Conception et exploitation des tubes prolongateurs pour les forages en mer (ISO 13624-1:2009)
L'ISO 13624-1:2009 porte sur la conception, la sélection, le fonctionnement et la maintenance des tubes prolongateurs pour les forages flottants. Elle fait office de référence pour les concepteurs, ainsi que pour les personnes qui sélectionnent les composants du système et qui utilisent et entretiennent cet équipement. Elle repose sur des principes d'ingénierie et sur l'expérience acquise des exploitants, entrepreneurs et fabricants hauturiers.
Les tubes prolongateurs pour les forages en mer sont essentiellement perçus comme un système. Il est nécessaire que les concepteurs, les entrepreneurs et les exploitants conçoivent et sélectionnent les composants individuels de manière à s'adapter aux performances globales dudit système. Pour les besoins de l'ISO 13624-1:2009, un tube prolongateur pour les forages en mer est composé d'un système tensionneur et de tous les équipements placés entre le joint flexible/joint à rotule supérieur et le bas du tube de cuvelage extérieur du conducteur de tête de puits. Il exclut spécifiquement le dériveur. De même, l'applicabilité de l'ISO 13624-1:2009 se limite aux opérations d'un bloc d'obturation de puits sous-marin déployé au niveau des fonds marins.
L'ISO 13624-1:2009 s'applique directement aux opérations de forage le plus flottant ainsi qu'aux situations particulières de forage en eau profonde et écrasements. Les considérations particulières requises pour les forages sans câble de guidage sont également traitées, ainsi que les conditions par temps froid et les considérations H2S.
Il est important que les principaux composants du chemin de charge du tube abordés dans l'ISO 13624-1:2009 soient conformes aux classifications de charge spécifiées dans l'ISO 13625.
Industrija za predelavo nafte in zemeljskega plina - Vrtalna in proizvodna oprema - 1. del: Načrtovanje in delovanje dvižne opreme za vrtine na morju (ISO 13624-1:2009)
Ta del ISO 13624 se nanaša na načrtovanje, izbor, delovanje in vzdrževanje dvižne opreme na morju za plavajoče operacije vrtanja. Namenjen je temu, da služi kot referenca za načrtovalce, za tiste, ki izbirajo sistemske komponente, ter za tiste, ki uporabljajo in vzdržujejo to opremo. Osnovan je na osnovnih inženirskih načelih in akumuliranih izkušnjah operaterjev na morju, izvajalcev in proizvajalcev. Najboljše je, če na dvižno opremo za vrtine na morju gledamo kot na sistem. Načrtovalci, izvajalci in operaterji se morajo zavedati, da so posamezne komponente priporočene in izbrane na način, ki ustreza celovitemu delovanju sistema. Za namene tega dela ISO 13624 dvižni sistem za vrtine na morju zajema sistem napenjanja ter vso opremo med zgornjo povezavo zgornjega upogljivega/krogličnega spoja in spodnjim delom zunanjega ohišja prevodnika vrtalne glave. Izrecno izključuje preusmerjevalec. Veljavnost tega dela ISO 13624 je tudi omejena na delovanje s stolpom za preprečevanje izbruhov med vrtanjem, ki je nameščen pod vodno gladino na morskem dnu. Klavzule od 1 do 7 tega dela ISO 13624 veljajo neposredno za večino plavajočih operacij vrtanja. Posebne situacije so obravnavane v točkah 8.1 in 8.4, ki obravnavata globokomorsko vrtanje in sesedanje. Posebne zahteve, ki jih je potrebno upoštevati pri vrtanju brez vodil, so obravnavane v točki 8.2. Poleg tega točki 8.3 in 8.5 obravnavata operacije v pogojih hladnega vremena, kot tudi zadeve, na katere je potrebno paziti v zvezi s H2S. Pomembno je, da vse komponente dvižnega sistema, ki tvorijo pot primarnega nakladanja in ki so obravnavane v tem delu ISO 13624, ustrezajo klasifikacijam tovora, ki so določene v ISO 13625.
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Erdöl- und Erdgasindustrien - Bohr- und Förderanlagen - Auslegung und Betrieb von Bohrförderanlagen auf See (ISO 13624-1:2009)Industries du pétrole et du gaz naturel - Équipement de forage et de production - Partie 1: Conception et exploitation des tubes prolongateurs pour les forages en mer (ISO 13624-1:2009)Petroleum and natural gas industries - Drilling and production equipment - Part 1: Design and operation of marine drilling riser equipment (ISO 13624-1:2009)75.180.10Oprema za raziskovanje in odkopavanjeExploratory and extraction equipmentICS:Ta slovenski standard je istoveten z:EN ISO 13624-1:2009SIST EN ISO 13624-1:2010en,fr01-januar-2010SIST EN ISO 13624-1:2010SLOVENSKI
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SIST EN ISO 13624-1:2010
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN ISO 13624-1
November 2009 ICS 75.180.10 English Version
Petroleum and natural gas industries - Drilling and production equipment - Part 1: Design and operation of marine drilling riser equipment (ISO 13624-1:2009)
Industries du pétrole et du gaz naturel - Équipement de forage et de production - Partie 1: Conception et exploitation des tubes prolongateurs pour les forages en mer (ISO 13624-1:2009)
Erdöl- und Erdgasindustrien - Bohr- und Förderanlagen - Auslegung und Betrieb von Bohrförderanlagen auf See (ISO 13624-1:2009) This European Standard was approved by CEN on 29 September 2009.
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 CEN 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 CEN Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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.
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B-1000 Brussels © 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 13624-1:2009: ESIST EN ISO 13624-1:2010
EN ISO 13624-1:2009 (E) 2 Contents Page Foreword .3 SIST EN ISO 13624-1:2010
EN ISO 13624-1:2009 (E) 3 Foreword This document (EN ISO 13624-1:2009) has been prepared by Technical Committee ISO/TC 67 "Materials, equipment and offshore structures for petroleum, petrochemical and natural gas industries" in collaboration with 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 May 2010, and conflicting national standards shall be withdrawn at the latest by May 2010. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, 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 the United Kingdom. Endorsement notice The text of ISO 13624-1:2009 has been approved by CEN as a EN ISO 13624-1:2009 without any modification.
SIST EN ISO 13624-1:2010
SIST EN ISO 13624-1:2010
Reference numberISO 13624-1:2009(E)© ISO 2009
INTERNATIONAL STANDARD ISO13624-1First edition2009-11-15Petroleum and natural gas industries — Drilling and production equipment — Part 1: Design and operation of marine drilling riser equipment Industries du pétrole et du gaz naturel — Équipement de forage et de production — Partie 1: Conception et exploitation des tubes prolongateurs pour les forages en mer
SIST EN ISO 13624-1:2010
ISO 13624-1:2009(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
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SIST EN ISO 13624-1:2010
ISO 13624-1:2009(E) © ISO 2009 – All rights reserved iii Contents Page Foreword.v Introduction.vi 1 Scope.1 2 Normative references.1 3 Terms, definitions, and abbreviations.2 3.1 Terms and definitions.2 3.2 Abbreviations.10 4 Component function and selection.11 4.1 Introduction.11 4.2 Component selection criteria.11 4.3 Marine drilling riser system.11 4.4 Tensioner system.13 4.5 Diverter system (surface).14 4.6 Telescopic joint (slip joint).14 4.7 Riser joints.16 4.8 Lower marine riser package (LMRP).17 4.9 Flex and ball joints.18 4.10 Flexible choke and kill lines.19 4.11 Riser running equipment.20 4.12 Riser-mounted choke/kill and auxiliary lines.21 4.13 Buoyancy equipment.22 4.14 Specialty equipment.23 5 Riser response analysis.24 5.1 General considerations.24 5.2 Riser analysis procedure.24 5.3 Design.25 5.4 General riser modelling and analysis approach.29 5.5 Coupled/decoupled analysis methodology.35 5.6 Drift-off/drive-off analysis methodology.36 5.7 Weak-point analysis methodology.37 5.8 Recoil analysis methodology.38 5.9 High-current environment.38 5.10 Hang-off analysis methodology.41 6 Riser operations.44 6.1 Introduction.44 6.2 Rise operations manual.44 6.3 Drilling-riser-operations information systems.44 6.4 Preparing to run riser.45 6.5 Riser running and retrieval.48 6.6 Installed riser operations.51 6.7 Emergency disconnect — Sudden storm, drive-/drift-off.57 7 Riser integrity.58 7.1 Basis of inspection requirements.58 7.2 Maintenance after riser retrieval.62 7.3 Other riser system maintenance.62 7.4 Transportation, handling, and storage.62 7.5 Scheduled field inspection and maintenance.64 7.6 In-service inspection.64 SIST EN ISO 13624-1:2010
ISO 13624-1:2009(E) iv © ISO 2009 – All rights reserved 7.7 Guidance on components for inspection.68 7.8 Inspection objectives and acceptance criteria.69 7.9 Operational records for riser components.71 8 Special situations.73 8.1 Deep-water drilling.73 8.2 Guidelineless systems.76 8.3 Cold weather considerations.76 8.4 Riser collapse considerations.77 8.5 H2S considerations.78 Annex A (informative)
Riser analysis data worksheet.79 Annex B (informative)
Fatigue.83 Annex C (informative)
Sample riser calculations.85 Annex D (informative)
Example riser running procedure.96 Annex E (informative)
Sample calculation of maximum and minimum TJ stroke arising from space-out tolerance, riser stretch, draft, tide, heave and offset.98 Bibliography.102
SIST EN ISO 13624-1:2010
ISO 13624-1:2009(E) © ISO 2009 – All rights reserved v 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 2. The main task of technical committees is to prepare International Standards. 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 document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 13624-1 was prepared by Technical Committee ISO/TC 67, Materials, equipment and offshore structures for petroleum, petrochemical and natural gas industries, Subcommittee SC 4, Drilling and production equipment. ISO 13624 consists of the following parts, under the general title Petroleum and natural gas industries — Drilling and production equipment: ⎯ Part 1: Design and operation of marine drilling riser equipment ⎯ Part 2: Deepwater drilling riser methodologies, operations, and integrity technical report (Technical Report)
SIST EN ISO 13624-1:2010
ISO 13624-1:2009(E) vi © ISO 2009 – All rights reserved Introduction Since the first edition of API RP 16Q was first issued in November, 1993, hydrocarbon exploration in deep-water environments has increased significantly. As a consequence of this, the need has been identified to update that code of practice to address the issues of deep-water drilling risers in sufficient detail to supplement API RP 16Q for drilling in water depths up to 3 048 m (10 000 ft). Under the auspices of the DeepStar programme, substantial work was commissioned during 1999 and 2000 by the DeepStar Drilling Committee 4502 and lead to the development by several contractors of Deep-water Drilling Riser Methodologies, Operations, and Integrity Guidelines in February 2001. These guidelines were intended to supplement the existing text of API RP 16Q (1993). In a subsequent Joint Industry Project funded by DeepStar 5500 and in collaboration with API, these guidelines were supplemented with other identified revisions to produce a draft update second edition of API RP 16Q and an associated API Technical Report 16TR1, designed to be read in conjunction with the revised API RP 16Q and to supplement its contents, by providing additional guidance on recommended riser analysis methodologies through detailed explanations, step-by-step procedures and worked examples. API publications can be used by anyone desiring to do so. Every effort has been made to assure the accuracy and reliability of the data contained in them. It is the responsibility of the users of this part of ISO 13624 to ensure that its use does not result in any loss or damage or in the violation of any federal, state, or municipal regulation. Annex A through Annex E are informative.
SIST EN ISO 13624-1:2010
INTERNATIONAL STANDARD ISO 13624-1:2009(E) © ISO 2009 – All rights reserved 1 Petroleum and natural gas industries — Drilling and production equipment — Part 1: Design and operation of marine drilling riser equipment 1 Scope This part of ISO 13624 pertains to the design, selection, operation and maintenance of marine riser systems for floating drilling operations. Its purpose is to serve as a reference for designers, for those who select system components, and for those who use and maintain this equipment. It relies on basic engineering principles and the accumulated experience of offshore operators, contractors, and manufacturers. NOTE Technology is advancing in this field and improved methods and equipment are continually evolving. Each owner and operator is encouraged to observe the recommendations outlined herein and to supplement them with other proven technology that can result in more cost effective, safer, and/or more reliable performance. The marine drilling riser is best viewed as a system. It is necessary that designers, contractors, and operators realize that the individual components are recommended and selected in a manner suited to the overall performance of that system. For the purposes of this part of ISO 13624, a marine drilling riser system includes the tensioner system and all equipment between the top connection of the upper flex/ball joint and the bottom of wellhead conductor outer casing. It specifically excludes the diverter. Also, the applicability of this part of ISO 13624 is limited to operations with a subsea BOP stack deployed at the seafloor. Clauses 1 through 7 of this part of ISO 13624 are directly applicable to most floating drilling operations. Special situations are addressed in 8.1 and 8.4 dealing with deep-water drilling and collapse. The special considerations required for guidelineless drilling are addressed in 8.2. In addition, 8.3 and 8.5 address operations in cold-weather conditions and H2S considerations. It is important that all riser primary-load-path components addressed in this part of ISO 13624 be consistent with the load classifications specified in ISO 13625. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 13625, Petroleum and natural gas industries — Drilling and production equipment — Marine drilling riser couplings BS 7910, Guide to methods for assessing the acceptability of flaws in metallic structures SIST EN ISO 13624-1:2010
ISO 13624-1:2009(E) 2 © ISO 2009 – All rights reserved 3 Terms, definitions, and abbreviations 3.1 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1.1 accumulator 〈BOP〉 pressure vessel charged with gas (nitrogen) over liquid and used to store hydraulic fluid under pressure for operation of blowout preventers 3.1.2 accumulator 〈riser tensioner〉 pressure vessel charged with gas (generally nitrogen) over liquid that is pressurized on the gas side from the tensioner high-pressure gas supply bottles and supplies high-pressure hydraulic fluid to energize the riser tensioner cylinder 3.1.3 actuator mechanism for the remote or automatic operation of a valve or choke 3.1.4 air-can buoyancy tension applied to the riser string by the net buoyancy of an air chamber created by a closed top, open-bottom cylinder forming an air-filled annulus around the outside of the riser pipe 3.1.5 annulus space between two pipes when one pipe is inside the other 3.1.6 apparent weight effective weight submerged weight weight minus buoyancy NOTE Apparent weight is commonly referred to as weight in water, wet weight, submerged weight, or effective weight. 3.1.7 auxiliary line conduit (excluding choke-and-kill lines) attached to the outside of the riser main tube EXAMPLE Hydraulic supply line, buoyancy-control line, mud-boost line. 3.1.8 back pressure pressure resulting from restriction of fluid flow downstream 3.1.9 ball joint ball-and-socket assembly that has a central through-passage equal to or greater than the riser internal diameter and that may be positioned in the riser string to reduce local bending stresses 3.1.10 blowout uncontrolled flow of well fluids from the wellbore SIST EN ISO 13624-1:2010
ISO 13624-1:2009(E) © ISO 2009 – All rights reserved 3 3.1.11 blowout preventer BOP device attached immediately above the casing, which can be closed to shut in the well 3.1.12 blowout preventer 〈annular type〉 remotely controlled device which can form a seal in the annular space around any object in the wellbore or upon itself NOTE
Compression of a reinforced elastomer packing element by hydraulic pressure effects the seal. 3.1.13 BOP stack assembly of well-control equipment, including BOPs, spools, valves, hydraulic connectors and nipples, that connects to the subsea wellhead NOTE Common usage of this term sometimes includes the lower marine riser package (LMRP). 3.1.14 bottom-hole assembly BHA assembly composed of the bit, stabilizers, reamers, drill collars, various types of subs, etc., that is connected to the bottom of a string of drillpipe 3.1.15 box female member of a riser coupling, C&K line stab assembly or auxiliary line stab assembly 3.1.16 breech-block coupling coupling that is engaged by rotation of one member into an interlock with another member by an angle of rotation of 90 ° or less 3.1.17 buoyancy-control line auxiliary line dedicated to controlling, charging or discharging air-can buoyancy chambers 3.1.18 buoyancy equipment devices added to riser joints to reduce their apparent weight, thereby reducing riser top tension requirements NOTE The devices normally used for risers take the form of syntactic foam modules or open-bottom air chambers. 3.1.19 choke-and-kill line C&K line kill line external conduit arranged laterally along the riser pipe and used for circulation of fluids into and out of the wellbore to control well pressure 3.1.20 control pod assembly of subsea valves and regulators that, when activated from the surface, directs hydraulic fluid through special porting to operate BOP equipment 3.1.21 coupling mechanical means for joining two sections of riser pipe in an end-to-end engagement SIST EN ISO 13624-1:2010
ISO 13624-1:2009(E) 4 © ISO 2009 – All rights reserved 3.1.22 diverter device attached to the wellhead or marine riser to close the vertical flow path and direct well flow away from the drill-floor and rig 3.1.23 dog-type coupling coupling having wedges (dogs) that are mechanically driven between the box and pin for engagement 3.1.24 drape hose flexible line connecting a choke, kill or auxiliary line terminal fitting on the telescopic joint to the appropriate piping on the rig structure NOTE A U-shaped bend or “drape” in this line allows for relative movement between the inner barrel of the telescopic joint and the outer barrel of the telescopic joint as the vessel moves. 3.1.25 drift-off unintended lateral move of a dynamically positioned vessel off of its intended location relative to the wellhead, generally caused by loss of stationkeeping control or propulsion 3.1.26 drilling fluid mud water- or oil-based fluid circulated down the drillpipe into the well and back up to the rig for purposes including containment of formation pressure, the removal of cuttings, bit lubrication and cooling, treating the wall of the well and providing a source for well data 3.1.27 drive-off unintended move of a dynamically positioned vessel off location driven by the vessel's main propulsion or stationkeeping thrusters 3.1.28 dynamic positioning automatic stationkeeping computerized means of maintaining a vessel on location by selectively driving thrusters 3.1.29 dynamic tension limit maximum allowable pressure multiplied by the effective hydraulic area, divided by the number of line parts 3.1.30 effective hydraulic cylinder area net area of moving parts exposed to tensioner hydraulic pressure 3.1.31 effective tension tension that controls the stability of risers See 5.4.4. 3.1.32 factory acceptance testing testing by a manufacturer of a particular product to validate its conformance to performance specifications and ratings SIST EN ISO 13624-1:2010
ISO 13624-1:2009(E) © ISO 2009 – All rights reserved 5 3.1.33 fail safe term applied to equipment or a system so designed that, in the event of failure or malfunction of any part of the system, devices are automatically activated to stabilize or secure the safety of the operation 3.1.34 fillup line line through which fluid is added to the riser annulus 3.1.35 flange-type coupling coupling having two flanges joined by bolts 3.1.36 fleet angle angle between the vertical axis and a riser tensioner line at the point where the line connects to the telescopic joint See Figure 1. 3.1.37 flex joint steel and elastomer assembly that has a central through-passage equal to or greater in diameter than the riser bore and that may be positioned in the riser string to reduce local bending stresses 3.1.38 gooseneck type of terminal fitting using a pipe section with a semicircular bend to achieve a nominal 180° change in flow direction 3.1.39 guidelineless re-entry establishment of pressure-containing connection between the BOP stack and the subsea wellhead or between the LMRP and the BOP stack using a TV image and/or acoustic signals instead of guidelines to guide the orientation and alignment 3.1.40 handling tool running tool device that joins to the upper end of a riser joint to permit lifting and lowering of the joint and the assembled riser string in the derrick by the elevators 3.1.41 heave vessel motion in the vertical direction 3.1.42 hot spot stress local peak stress highest stress in the region or component under consideration NOTE The basic characteristic of a peak stress is that it causes no significant distortion and is principally objectionable as a possible initiation site for a fatigue crack. These stresses are highly localized and occur at geometric discontinuities. 3.1.43 hydraulic connector mechanical connector that is activated hydraulically and connects the BOP stack to the wellhead or the LMRP to the BOP stack SIST EN ISO 13624-1:2010
ISO 13624-1:2009(E) 6 © ISO 2009 – All rights reserved 3.1.44 hydraulic supply line auxiliary line
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