Synthetic Mud Ropes for Offshore Mooring Applications Field History and Testing Data
|
|
- Harvey Page
- 5 years ago
- Views:
Transcription
1 Synthetic Mud Ropes for Offshore Mooring Applications Field History and Testing Data Jason D. Pasternak Delmar Systems, Inc Wilcrest Dr., Suite 225 Houston, TX USA John Shelton Delmar Systems, Inc Wilcrest Dr., Suite 225 Houston, TX USA Justin Gilmore Samson Rope 2090 Thornton St. Ferndale, WA USA Abstract With the continuing development of synthetic ropes and real-world experience gained through their use in offshore mooring operations, it is evident that previous reservations about the use of synthetics in soils are no longer warranted. This is proven through the extensive documentation of field service history, coupled with rope and fiber testing of a jointly developed High Modulus Polyethylene (HMPE) mud rope, which is presented to industry in this paper. The mud rope examined in this paper is of 8x3 open-braid HMPE construction. This open-braid construction facilitates visual inspections of each rope, allowing for significant time savings during expensive offshore operations. Each of the subropes within the main rope has its own separate filter barriers and jackets. These individually jacketed subropes allow for more residual strength in the rope should a breach in the jacket occur and cause premature fiber wear and internal abrasion. As the ropes are comprised of lighter HMPE material, they are easier to handle offshore on the deck of an Anchor Handling Vessel (AHV), reducing the likelihood of accidents and injuries. This low density also allows the ropes minimal interference in the freefall trajectory of the gravity-installed anchor to which they are directly connected. The ropes have initial lengths of ~335-ft, and due to their direct connection to the gravity-installed anchor, much of the rope is under cyclic tension under the mudline. Given the excellent fatigue and abrasion resistance of HMPE, in addition to all of the aforementioned benefits, it is an excellent choice for ropes that are under continual use under harsh conditions. The service life of this rope spans from its first installation into Gulf of Mexico soils on 3/12/08 to the final retrieval date of 1/20/10 (~679 days). The actual total time in the mud is documented to be ~544 days. During that service life, the rope was placed on two semi-submersible MODUs (Mobile Offshore Drilling Units) and in six different mooring system configurations. In late August of 2008, the rope was connected to a MODU during hurricane Gustav, experiencing storm loads calculated to be in excess of ~1,050-kips (~1,050,000-lbs). The rope was inspected and measured to determine if any permanent damage was done to it. As the rope did not experience loading near its MBL (Minimum Break Load) of 800 metric tones (~1764- kips), the rope was deemed safe for further use. After minor jacket repairs, the rope was placed back into service, where it remained until January of After being retired from service, the rope underwent several destructive tests. Testing was performed on the rope fibers to confirm fiber creep, static stiffness, and post-service MBL (Minimum Break Load). A similar testing scope was performed on the rope to examine overall rope creep, rope static stiffness, and post-service MBL. This paper documents the detailed records of an HMPE mud rope throughout its service life, along with the rope and fiber testing techniques and results that were used to verify its integrity after the rope was retired. I. BACKGROUND High Modulus PolyEthylene (HMPE) fibers, with their very high strength to weight ratios, are utilized more and more frequently in heavy industrial and offshore applications. These fibers, when incorporated into large ropes, produce ropes that are orders of magnitude stronger than wire ropes of similar weight. The benefits of this lighter rope material are seen in several applications where heavier weights or larger rope diameters are less desirable. For example, HMPE ropes increase payload capacities during deepwater heavy lift and deployment operations. Another key benefit over other rope fibers includes an increased abrasion resistance. Offshore deepwater mooring is an industry that benefits greatly from the increasing utilization of HMPE ropes. When used as a major mooring component, they allow greater variable deck loads on Semisubmersibles through mooring weight reductions as well as lower current drag loading on mooring lines due to smaller rope diameters. The OMNI-Max anchor is a relatively new development within the deepwater mooring industry. It allows for rapid installation and removal of high holding capacity anchors with significant out-of-plane loading capabilities. An integral part of the rigging design that allows for rapid deployment and recovery is the HMPE mooring mud rope (the orange and blue rope depicted on the left of Figure 1). For the use of the rope documented in this paper, the OMNI-Max mud rope, a jacketed open-braid HMPE rope with load bearing fibers consisting of Dyneema SK 75 was chosen. The light weight (near-neutral buoyancy), high abrasion resistance, and excellent fatigue life properties were all factors 1
2 in the rope selection. The light weight prevents free-fall trajectory issues with the OMNI-Max gravity-installed anchor, while facilitating rope handling and inspection. The resistance to abrasion is necessary for the numerous deployment and recovery operations, due to rope interactions with vessel decks and stern rollers, as well as during soil impact and drag below the mudline. The long fatigue life allows for a longer service life of the rope, making it a more cost-effective solution than some other options. II. SERVICE RECORDS The service life of the mud rope documented in this paper spans from 3/12/08 to 1/20/10 (approximately 679 days) with a total in-place time in the mud of ~544 days. During that service life, the rope was placed on two Mobile Offshore Drilling Units (MODUs), six different mooring system configurations and locations, and experienced hurricane Gustav. The following is a brief summary of the service record of the rope. The first deployment was on a taut mooring system for Diamond Offshore s Ocean Valiant semi-submersible MODU in an area of complex seafloor bathymetry within a block in East Breaks on March 12, The mooring configuration for these lines had a high anchor uplift angle, partially due to the downward slope of the seafloor and partially due to the necessity of the taut mooring line to clear subsea infrastructure. The OMNI-Max anchor was chosen for these preset lines due to the highly sloped and fault-ridden seafloor, which made using drag anchors near impossible and suction pile anchors undesirable. As a method of internal validation, the client requested that the mooring lines containing OMNI-Max anchors be proof loaded as high as possible, which resulted in a load of ~611-kips (~232 metric tons) at the mooring mud rope and anchor. When the rope was recovered on July 27, 2008 (~137 days later), it was inspected and found to be in good condition, without visible defects (Figure 2). During the second deployment, the mud rope experienced both its longest continuous time in soil and its highest loading condition prior to post-retirement MBL testing. The anchor and mud rope were preset in Mississippi Canyon on August 5, 2008 for the Transocean Sedco Forex (TSF) Amirante. While on location and connected, the Amirante was hit by Hurricane Gustav, which applied a maximum estimated load of ~1,096 kips (~497 metric tons) to the mud rope and anchor. The rope was recovered on January 12, 2009 (~159 days after installation) with a visible tear in one subrope jacket. As the damage did not extend to the load bearing fibers, the rope was repaired and made ready for redeployment. The third mud rope installation was the shortest continuous time in soil during service and lowest loading condition of the rope. The anchor and mud rope were preset in Mississippi Canyon on May 13, 2009 for the TSF Amirante. The anchor was recovered ~29 days later on June 10, During this deployment, no significant anchor or mud rope tension was experienced, as the anchor was not proof loaded or connected to the MODU. The rope was deployed and recovered in good condition. The fourth installation of the mud rope was on June 10, 2009 in Mississippi Canyon. The rope was preset and connected to the TSF Amirante. During the ~110 days of deployment, the largest tension experienced by the rope was during proof-loading (~339 kips at the mud rope). The rope was recovered without incident and in good condition on September 28, The fifth mud rope deployment was on October 3, The rope was preset and connected to the TSF Amirante in East Breaks. During the ~34 days of deployment, the largest tension experienced by the rope was during proof-loading (~347 kips at the mud rope). The rope was inspected in the water with a Remotely Operated Vehicle (ROV) on November 6, 2009 (Figure 3) and wet towed to the sixth installation location. The sixth and final deployment of the mud rope was on November 6, The rope was preset and connected to the TSF Amirante in East Breaks. During the ~75 days of deployment, the largest tension experienced by the rope was during proof-loading (~361 kips at the mud rope). During recovery operations on January 20, 2010, several subropes came loose from the braided eyes, requiring the rope to be sent back to shore for splicing. The overall length of the rope was initially measured (before service) at a reference tension (based on standard Cordage Institute recommendations of 200*d 2 ) to be 350-ft long [4]. After service was discontinued, the rope was measured at the same reference tension to be ~357-ft long, a measured permanent elongation of 2%. Delmar internal specifications for rope retirement due to creep allows a measurement of up to 6% elongation in the mud rope, which is significantly below API recommendations of 10% [1]. III. BREAK TEST SAMPLES Two HMPE rope sections, each of ~63-ft length from pin to pin (Figure 4), were created from each end of a single 350-ft OMNI-Max mud rope (Figure 5). Each rope consisted of the same construction (Figure 6) with a 10-ft long center rope section, 6-ft long soft eyes, and ~20.5-ft long splices. One section was taken from the anchor side of the mud rope, which contained a repaired cover of a section of subrope, while the other was taken from the mud mat side. IV. BREAK TEST PROCEDURES This section of the paper documents the Delmar-proposed break test procedures that were followed to determine the Minimum Break Loads (MBLs) of each rope sample. The test ropes were soaked in water for a duration of 22 to 26-hours prior to testing, placed expeditiously within the testing apparatus, and kept moist during the tests (by soaker hoses). During rope soaking, water temperature was maintained between 15 C and 25 C (59 F and 77 F). All testing recorded load and extension in adequate sampling intervals such that an accurate representation was captured without fitting a curve to the data points. Testing was not interrupted in the middle of test sets. Time was recorded throughout the test so cycle rates could be verified. Tolerances 2
3 on the loads applied to the test ropes were maintained within 2% MBL. The proposed break test of each rope was specified to consist of a 10-cycle bedding-in stage, immediately followed by a slow pull to break (Figure 7). Each bedding-in cycle was defined as a loading from 1% MBL to 30% MBL, and relaxing back to 1% MBL at a rate of ~10% MBL / min. The break test was defined as a linearly increasing load from 1% MBL to break at a rate of 1% MBL per minute. Given the slow rate of loading, a static stiffness approximation for the rope can be obtained from the MBL data. V. BREAK TEST RESULTS Due to the manual nature of the testing apparatus, the proposed testing procedure in Figure 7 was followed as closely as possible, with constant manual adjustments, but the actual loading / unloading rates are largely scattered from the desired rates (Figure 8). For Figures 8-11, some of the erroneous readings from the raw data collected were removed to better portray usable results. Figure 9 depicts the corresponding extension versus time for the two rope sections. Figure 11 depicts a very close correlation between the examined approximate static stiffness of each rope test section. As the percent of elongation (depicted in Figures 9 and 10), which is used to calculate static stiffness (Figure 11), is based upon the pin to pin sample length, not a measured test section of mid-span rope, the static stiffness results obtained from this test should be taken as upper-bound approximations of actual rope sections provided by Samson to Delmar. Each test rope section broke in excess of the original specified rope MBL of 1,763.7-kips (800-mt). The sample taken from the mud mat side of the mud rope broke at ~2,086.7-kips (~118% of new MBL), and the sample taken from the anchor side broke at ~1,824.9-kips (~104% of new MBL). The high variance seen in the break tensions from the specified MBL is likely due to the rope jacket repair preventing proper load sharing in the rope splice, causing the lower break strength. VI. YARN TESTING Yarn samples were removed from several sections within the mud rope, including the rope sections used in the break tests, for comparison with new yarns. No abnormalities were noted in the sample yarns, with all test results yielding acceptable strength and elongation results (Figure 12). VII. FILTER CLOTH INSPECTION The rope jacket was removed from the rope in several places, including the rope sections used in the break tests, to allow inspection of the filter cloth. No particle ingress was noted on either end of the rope, with very slight staining of the filter cloth and adjacent fibers observed. Figure 13 depicts the filter cloth and fibers contained within it. VIII. CREEP TESTING Creep testing was performed by Samson on yarns from the test rope by loading the yarns to 40% of their average breaking strength at a temperature of 50 C (122 F). This higher temperature increases the creep rate, allowing for a shorter duration test. The test yielded creep rates of 1% elongation per 13.4 hours for new yarns and 1% elongation per 16.7 hours for the used yarns, a 20% reduction in creep life for the used yarns. Due to the 50% rope efficiency (rope strength versus the strength of the sum of the sub ropes), this translates to a loss of creep life in the rope of ~10%, reducing the original DSM estimated new rope creep life of 14 years by ~1.4 years (12.6-year creep life remaining). Due to the increased temperature used during testing, this estimated 10% reduction in creep life examined in the rope is considered conservative. IX. CONCLUSIONS Testing results show that no abnormal reduction in break strength or creep life was examined within the mud rope due to described service conditions, including no observed soil ingress. According to all of the examined evidence, the difference in break tensions of the two samples was observed most likely due to a rope jacket repair located within the eye splice, which may have caused improper load-sharing amongst the sub ropes. However, this reduced capacity was still above catalog MBL ratings for a new rope. ACKNOWLEDGMENT The authors would like to thank Dillon Shuler and Robert Garrity of Delmar for their contributions to this project. REFERENCES [1] API RP 2I, In-Service Inspection of Mooring Hardware for Floating Structures, 3 rd Edition, April [2] API RP 2SK, Design and Analysis of Station Keeping Systems for Floating Structures, 3 rd Edition, October [3] API RP 2SM, Recommended Practice for Design, Manufacture, Installation, and Maintenance of Synthetic Fiber Ropes for Offshore Mooring, 1 st Edition, March [4] CI , Cordage Institute Test Methods for Fiber Rope, 2 nd Edition, May [5] Del Inspection Report rev , Samson Inspection Report, September
4 Figure 1: OMNI-Max Anchor Assembly Ready to Deploy Figure 3: Typical Screen Shot Taken from ROV Rope Inspection Video (11/06/09) Figure 2: Typical Screen Shot Taken from on Deck Rope Inspection Video (7/29/08) Figure 4: Screen Shot Taken from Rope Testing Bed ANCHOR END UPPER END EXISTING SPLICE 116' for sling 116' for sling 47' (approx repair location) Figure 5: OMNI-Max Mud Rope Details [5] 4
5 UPPER END 63'-0" 6'-0" 20'-6" 10'-0" Figure 6: Typical Test Section Details [5] Tension (%MBL) Time (Minutes) Figure 7: Proposed Break Test Procedure Load [% MBL] Mud Mat Side Mud Rope (Load vs. Time) Anchor Side Time [sec] Figure 8: Actual Break Test (Loading) 5
6 Mud Rope (Extension vs. Time) Mud Mat Side Anchor Side Elongation [%] Time [sec] Figure 9: Actual Break Test (Extension) Load [%MBL] Mud Mat Side Mud Rope (Load vs. Extension) Anchor Side Elongation [%] Figure10: Actual Break Test (Load vs. Extension) 6
7 28 Mud Rope (Static Stiffness) Mud Mat Side Anchor Side Stiffness [xmbl] Load [%M BL] Figure 11: Actual Break Test (Approximate Static Stiffness vs. Load) Figure 12: Yarn Test Results [5] 7
8 Figure 13: Filter Cloth and Subrope Yarns [5] 8
ADDENDUM. Page iii, replace Foreword with: FOREWORD
Date of Issue: May 2007 Affected Publication: API Recommended Practice 2SM, Recommended Practice for Design, Manufacture, Installation, and Maintenance of Synthetic Fiber Ropes for Offshore Mooring, First
More informationAbrasion and Twist Effects on High-Performance Synthetic Ropes for Towing Applications
Abrasion and Twist Effects on High-Performance Synthetic Ropes for Towing Applications Kris Volpenhein, Application Engineer Rafael Chou, Vice President of Research and Development Samson Rope Technologies,
More informationOFFSHORE. SamsonRope.com
OFFSHORE Product and Technical Guide Rope.com High-performance synthetic ropes outperform wire and other synthetic alternatives The offshore oil and gas industry is finding out that is a heavyweight when
More informationPROVEN, RELIABLE PRODUCTS FROM A TRUSTED PARTNER Samson Heavy-Lift Slings
PROVEN, RELIABLE PRODUCTS FROM A TRUSTED PARTNER Samson Heavy-Lift Slings SAMSON HEAVY-LIFT SLINGS TESTED AND PROVEN TECHNICALLY SOUND Samson s R&D department has performed comprehensive testing of sling
More informationAbrasion and Residual Strength of Fiber Tuglines
Abrasion and Residual Strength of Fiber Tuglines Eric McCorkle Rafael Chou Danielle Stenvers Samson Rope Technologies 2090 Thornton St. Ferndale WA, 98248 Paul Smeets Martin Vlasblom Edwin Grootendorst
More informationQuicker and Safer Deployment of Deepwater MODU Moorings.
Quicker and Safer Deployment of Deepwater MODU Moorings www.offspringinternational.com Deepwater MODU Mooring Deepwater exploration increasing further offshore Deeper moorings over 7,000ft Larger MODUs
More informationOTC Copyright 2010, Offshore Technology Conference
OTC 21018 Mooring Design and Installation Considerations for the Mirage and Telemark Field Development Todd Veselis, InterMoor; Ross Frazer, SPE, ATP Oil & Gas Corporation; Mark Huntley, Whitehill Manufacturing
More informationOFFSHORE HEAVY LIFTING
OFFSHORE HEAVY LIFTING HEAVY LIFT SLINGS BEXCO has been instrumental in successfully implementing heavy lift projects for major offshore contractors with its custom-made solutions, which are built to match
More informationAppendix 11-B Anchor Handling Systems, Set Up and Handling
Revision History Revision Date Section Changes Number 1 Sept 1 Permanent Chaser Pendant (PCP) Drawing updated 2018 2 Pennant Buoy System Drawing updated 3 Working Wire/Chaser Termination on Drawing updated
More informationOLYMPUS TLP TOW-OUT Shell s First Use of Synthetic Rigging Results in Operational and HSSE Benefits PROJECT OVERVIEW CASE STUDY
CASE STUDY OLYMPUS TLP TOW-OUT Shell s First Use of Synthetic Rigging Results in Operational and HSSE Benefits PROJECT OVERVIEW Transporting monolithic structures over long distances is a major undertaking
More informationDuring Ike-2008, four MODUs are reported to gone adrift or had partial mooring failures.
HURRICANES, ACCIDENT STATISTICS, AND CONSERVATISM The severe hurricanes in GOM (Andrew-1992, Lili-2002, Ivan-2004, Dennis-2005, Katrina and Rita-2005, Ike-2008), and the accident statistics in North Sea
More informationROPES. Material Nylon. Construction 8 12 strand, plaited Measure Metric U.S.
Catenary curve moorings are rigged from a combination of sinking and buoyant ropes. The properties of each rope perform specific functions or impart specific features to the mooring. As more than 90 per
More informationOUR ROPE, YOUR SOLUTION
OUR ROPE, YOUR SOLUTION Meeting the needs of ship owners and operators, today and tomorrow. The trend towards ever-larger vessels has dominated the industry over the last decade, with the world s leading
More informationROPE A NEW PERSPECTIVE ON RISK MANAGEMENT THROUGH LINE MAINTENANCE AND SELECTION
ROPE A NEW PERSPECTIVE ON RISK MANAGEMENT THROUGH LINE MAINTENANCE AND SELECTION TANKER OPERATOR CONFERENCE MAY 10 TH ATHENS 140 YEARS STRONG AGENDA Samson Ropes Mooring Experience Mooring Line Life Cycle
More informationengineered synthetic sling solutions
engineered synthetic sling solutions High Performance slings for surface and subsea lifting operations cortlandcompany.com trusted brands Two leading brands offer the unique combination of both rope and
More informationNEW ROPE TECHNOLOGIES IN MARINE APPLICATIONS
NEW ROPE TECHNOLOGIES IN MARINE APPLICATIONS Rafael Chou, Ph,D., Vice President R&D Denny Lam, Asian Regional Manager Samson Rope Technologies, Ferndale, WA 98248, USA ABSTRACT Synthetic ropes manufactured
More informationFatigue and Residual Strength of Fiber Tuglines
Fatigue and Residual Strength of Fiber Tuglines Eric McCorkle Rafael Chou Danielle Stenvers Samson Rope Technologies 2090 Thornton St. Ferndale WA, 98248 Abstract - High performance synthetic ropes have
More informationTechnical Literature. Plasma. Rope Quick Q & A
Technical Literature Plasma Rope Quick Q & A Plasma Rope Properties & Performance Plasma Rope "Quick" Q & A This brief guide is designed as a quick reference guide to basic questions on Cortland s Plasma
More informationSpectra and Plasma Ropes
Spectra and Plasma Ropes Introduction Puget Sound Rope (PSR) began manufacturing high performance ropes of Honeywell s Spectra ultra-high molecular weight polyethylene (UHMWPE) fiber in the 1980 s and
More informationUse of Synthetic Ropes in Deepwater Moorings
OIL & GAS Use of Synthetic Ropes in Deepwater Moorings INTSOK Conference Delivering Solutions: Deepwater Mega-Projects Robert Gordon, Sr. Principal Engineer 2015-02-19 1 DNV GL 2013 2015-02-19 SAFER, SMARTER,
More informationAbstract. 1. Introduction. 2. Design Requirements. Naval Engineer - INTERMOOR DO BRASIL 2. Petroleum Engineer INTERMOOR DO BRASIL 3
IBP1687_14 MOORING SYSTEM FOR A SEMI-SUBMERSIBLE RIG IN ULTRA-DEEPWATER AND UNDER SEVERE CURRENTS Debora C. B. Ralha 1, Manuela C. Corrêa 2, Jeremy Abercrombie 3 and Karina G. Pinheiro 1 Copyright 2014,
More informationTimm Signal Safety. Very durable indeed.
Timm Signal Safety Very durable indeed. TIMM Signal Safety is our high quality mixed polyolefin rope with a combination of high strength, great handling and superb buoyancy. It has a clear advantage over
More informationTechnical Literature. Plasma. 12x12 Sling Inspection Guidelines
Technical Literature Plasma 12x12 Sling Inspection Guidelines Plasma 12x12 Ropes Lifting Slings Made From Plasma 12x12 Ropes Plasma 12x12 ropes are excellent lightweight lifting tools providing reliable,
More informationThermal properties of Fiber ropes
Downloaded from orbit.dtu.dk on: Oct 16, 2018 Thermal properties of Fiber ropes Bossolini, Elena; Nielsen, Ole Wennerberg; Oland, Espen; Sørensen, Mads Peter; Veje, Christian Publication date: 2016 Document
More informationLearn more at
IBP1833_06 COST EFFICIENT ARTIFICIAL BUOYANT SEABED DRILLING SOLUTION Dan Moutrey 1, Frank Lim 2 Copyright 2006, Instituto Brasileiro de Petróleo e Gás - IBP This Technical Paper was prepared for presentation
More informationDevelopment of Self-Installing Deepwater Spar. Ashit Jadav February 2017
Development of Self-Installing Deepwater Spar Ashit Jadav February 2017 Contents Introduction & Background ACE Spar breakdown Installation Sequence Main particulars, Hull design and Weight control Stability
More informationMORDEC Synthetic Ropes
MORDEC Synthetic Ropes Types Of Synthetic Rope These products are manufactured in several international standards according to the destinations where the goods will be consumed. The major standards to
More informationCost efficient deep-water lowering with HMPE rope. Neil, LIU Yong-Le Technical Manager DSM Dyneema APAC Dec 02, 2016
Cost efficient deep-water lowering with HMPE rope Neil, LIU Yong-Le Technical Manager DSM Dyneema APAC Dec 02, 2016 Why are we looking for new solutions? More demand to install larger components Contractor/operator
More information2016 Catalog. hawserslingco.com
06 Catalog Table of Contents Definitions Company Info Quality and Continuous Improvement CORDAGE SuperMax SuperMax78 SuperMaxP SuperMax78P SuperMaxD HawserMax78D DyMax Nylon Double Braid / Polyester Double
More informationResidual Strength Testing of Dyneema, Fibre Tuglines
Residual Strength Testing of Dyneema, Fibre Tuglines Phil Roberts and Danielle Stenvers, Samson Rope Technologies Paul Smeets and Martin Vlasblom, DSM High Performance Fibers This lecture was presented
More informationESCONDIDO FIRE DEPT TRAINING MANUAL Section Truck Module Page 1 of 5 Ropes Care and Maintenance Revised
Truck Module Page 1 of 5 ROPE CARE Care and Maintenance Ropes require very little maintenance, but they can be damaged through improper care. It is extremely important that all firefighters understand
More informationAPPLYING VARIABLE SPEED PRESSURE LIMITING CONTROL DRIVER FIRE PUMPS. SEC Project No
APPLYING VARIABLE SPEED PRESSURE LIMITING CONTROL DRIVER FIRE PUMPS SEC Project No. 1803007-000 November 20, 2006 TABLE OF CONTENTS I. ABSTRACT...1 II. INTRODUCTION...1 III. HISTORY...2 IV. VARIABLE SPEED
More informationb
Empirically Derived Breaking Strengths for Basket Hitches and Wrap Three Pull Two Webbing Anchors Thomas Evans a and Aaron Stavens b a Montana State University, Department of Earth Sciences, PO Box 173480,
More informationNew Innovative Anchor Solution for Deepwater Mooring Gravity Intalled Anchors Reduce Time and Costs of Marine Operations Jon Tore Lieng CTO
New Innovative Anchor Solution for Deepwater Mooring Gravity Intalled Anchors Reduce Time and Costs of Marine Operations Jon Tore Lieng CTO Wokshop on Deepwater Subsea TieBack Damai Puri Resort & Spa,
More informationRIGID RISERS FOR TANKER FPSOs
RIGID RISERS FOR TANKER FPSOs Stephen A. Hatton 2H Offshore Engineering Ltd. SUMMARY Recent development work on the subject of dynamic rigid (steel pipe) risers demonstrates that their scope of application
More informationHow twist can affect braided marine ropes
Please note that this is an author-produced PDF of an article accepted for publication following peer review. The definitive publisher-authenticated version is available on the publisher Web site Sea Technology
More informationOTC HMPE Mooring Line Trial for Scarabeo III I. Corbetta, Saipem Inc. and F. Sloan, Puget Sound Rope
OTC 13272 HMPE Mooring Line Trial for carabeo III I. Corbetta, aipem Inc. and F. loan, Puget ound Rope Copyright 2001, Offshore Technology Conference This paper was prepared for presentation at the 2001
More informationSINGLE BRAID INSPECTION
INSPECTION PROTRUDING STRAND Often, a strand will get snagged or pulled out from the rest of the rope. As long as the strand isn t broken, this is a repairable issue. Protruding strands are generally caused
More informationOFFSHORE Synthetic ROPE SOLUTIONS HIGH-PERFORMANCE. Synthetic Lifting & Lowering Solutions
OFFSHORE Synthetic ROPE SOLUTIONS HIGH-PERFORMANCE Synthetic Lifting & Lowering Solutions THE SAMSON ADVANTAGE Replacement Considerations Samson has more experience replacing wire ropes with high-performance
More informationEVALUATION OF SYNTHETIC ROPE FOR STATIC RIGGING APPLICATIONS IN CABLE LOGGING
EVALUATION OF SYNTHETIC ROPE FOR STATIC RIGGING APPLICATIONS IN CABLE LOGGING Jared Leonard, John Garland, and Steve Pilkerton Graduate Research Assistant, Professor, and Research Forest Engineer, respectively
More informationb
Empirically Derived Breaking Strengths for Basket Hitches and Wrap Three Pull Two Webbing Anchors Thomas Evans a and Aaron Stavens b a Montana State University, Department of Earth Sciences, PO Box 173480,
More informationcurrents In this issue: Jubilation over Riser Installation with Samson s Customized rope conducts 11 riser pull-ins at the Jubilee field
JUNE 2011 currents New Developments in Synthetic Rope Technology In this issue: Jubilation over Riser Installation with Samson s Turbo-EPX Customized rope conducts 11 riser pull-ins at the Jubilee field
More informationSamson Commercial Marine
Commercial Marine Samson Commercial Marine MOORING TUG OFFSHORE Providing high performance synthetic solutions for mooring, tug, offshore, inland river, The Samson Advantage: Where technology and people
More informationTLP Minimum tendon tension design and tendon down-stroke investigation
Published by International Association of Ocean Engineers Journal of Offshore Engineering and Technology Available online at www.iaoejoet.org TLP Minimum tendon tension design and tendon down-stroke investigation
More informationCustom Cables and Ropes. Oceanographic and Research Solutions
Custom Cables and Ropes Oceanographic and Research Solutions Deep Ocean Research 2 cortlandcompany.com Custom solutions that meet the challenges posed by harsh environments, hydrostatic pressures, and
More informationTHE USE OF SPIN FIN PILES IN MASSACHUSETTS
THE USE OF SPIN FIN PILES IN MASSACHUSETTS Les R. Chernauskas, P.E., Geosciences Testing and Research, Inc., North Chelmsford, MA Leo J. Hart, Geosciences Testing and Research, Inc., North Chelmsford,
More informationROPE. Average Tensile (lbs) Average. Tensile. (lbs)
Rope Class ropes are made from any or all of the following fibers: olefin, polyester or nylon. Additional rope needed for splice length of crowns plus lengthof eye with thimble length of crowns plus cerc.
More informationORE Open Research Exeter
ORE Open Research Exeter TITLE Performance assessment of a novel active mooring system for load reduction in marine energy converters AUTHORS Luxmoore, J; Grey, S; Newsam, D; et al. DEPOSITED IN ORE 21
More informationNT09-21 Cruise Report SURUGA-BAY Cable Laying Experiment / VBCS Function Test
NT09-21 Cruise Report SURUGA-BAY Cable Laying Experiment / VBCS Function Test December 2009 Table of Contents 1. Overview 2. Schedule 3. Dive Summary 4. Concluding Remarks 1. Overview A unique development
More informationUNDERWATER VEHICLES, SYSTEMS AND HYPERBARIC FACILITIES 2002
RULES FOR BUILDING AND CLASSING UNDERWATER VEHICLES, SYSTEMS AND HYPERBARIC FACILITIES 2002 NOTICE NO. 5 January 2008 The following Rule Changes were approved by the ABS Rules Committee on 7 June 2007
More informationCare, Use and Inspection
Care, Use and Inspection of Synthetic Web Slings Safety is the paramount consideration involved in the use of any web sling. This standard does not purport to address all safety concerns, if any, associated
More informationUSER S INSTRUCTION MANUAL FOR THE INSTALLATION, OPERATION & MAINTENANCE OF THE GUARDIAN TEMPORARY HORIZONTAL LIFELINE SYSTEM
USER S INSTRUCTION MANUAL FOR THE INSTALLATION, OPERATION & MAINTENANCE OF THE GUARDIAN 04630 TEMPORARY HORIZONTAL LIFELINE SYSTEM 1 WARNING This is a design compatible component for a comprehensive Guardian
More informationINSTRUCTIONS FOR THE USE OF LONG LENGTH AND SPLICED HOSES
ContiTech Rubber Industrial Kft. Hose Technical Department HANDLING Page: 1/6 Date: 31.07.2008 Invalidate the document TKO AS1 rev.3 INSTRUCTIONS FOR THE USE OF LONG LENGTH AND SPLICED HOSES Prepared by:
More informationTop Tensioned Riser Challenges and Solutions for Dry Tree Facilities in Asia Pacific
June 2011 Top Tensioned Riser Challenges and Solutions for Dry Tree Facilities in Asia Pacific Daniel Brooker, MCS Kenny Presentation Agenda 1. Objectives 2. Top Tensioned Riser (TTR) Selection Drivers
More information2009 DOT CONFERENCE PRESENTATION
2009 DOT CONFERENCE PRESENTATION Deepwater Synthetic Lowering And Lifting With Enhanced Cyclic Bend Fatigue Resistance PRESENTERS: Justin Gilmore, Samson Robert Thomas, W. L. Gore & Associates INTRODUCTION
More informationGLS New Technology Rising to the Challenge of Subsea lifting. Subsea 2012 Paddy Collins
GLS New Technology Rising to the Challenge of Subsea lifting Subsea 2012 Paddy Collins Introductions Aubin Design, Develop and Supply own chemical technical technology Cement and Stimulation Pipeline products
More informationRVSS Appendix A Overview
RVSS Appendix A Overview Presented at RVTEC 2008 by Rich Findley rfindley@rsmas.miami.edu Definitions WINCH OWNER: The party or their representative who is normally responsible for the operation, inspection,
More informationStevpris Mk 6. The Industry Standard
Stevpris Mk 6 The Industry Standard Strong and versatile The range of water depths in which the offshore industry operates is expanding fast. The requirements for the mooring of floating units ask for
More informationLifecycle Performance of Escape Systems
Lifecycle Performance of Escape Systems A look at laboratory vs field conditioning of aramid fiber based escape systems. By James Hunter, Cedric Smith, Ole Kils and Tyler Mayer for ITRS 2018 1.1 Introduction
More informationLearn more at
STRIDE JIP Phase III SUT Talk 15th November 2 Offshore VIV monitoring (vortex induced vibration) Catenary riser interaction with deepwater seabeds 3 Full Scale Riser Monitoring To get real measurements
More informationROPE SELECTION & INSPECTION GUIDE
ROPE SELECTION & INSPECTION GUIDE TABLE OF CONTENTS Rope Construction 3 Identify Your Rope s Construction 4 Yale Cordage Products by Rope Construction 5 Single Braid Inspection 6 Protruding Strand 7 Abrasion
More informationSuction anchor foundations for tension and taut leg floaters in deep waters. Tension Leg Platform. Taut Leg Platform. upper chain. risers.
Case history: Soil investigation for offshore suction anchors anchor foundations for tension and taut leg floaters in deep waters Alternative anchors for floating structures pile Over last 5 - years anchoring
More informationPremium PowerPoint Presentation. Rigging Review
Premium PowerPoint Presentation Rigging Review Chapter 1 Hoisting Safety Review: What about the CG Symmetrical vs. Asymmetrical Balanced and Unbalanced Lifting Lug Hooks Angle Deformation Safety Gates
More informationStandard Operating Procedure
Standard Operating Procedure BOOMS Offshore RO-BOOM / Lamor HD boom Equipment description SOP intended for the use and deployment of Lamor HD 1300 and Desmi Ro-clean 1500 offshore boom. The boom reel holds
More informationInnovative and Robust Design. With Full Extension of Offshore Engineering and Design Experiences.
Innovative and Robust Design by VL Offshore With Full Extension of Offshore Engineering and Design Experiences www.vloffshore.com Y Wind Semi Designed by VL Offshore The Y Wind Semi platform (foundation)
More informationStevpris installation
chaser Stevpris deployment for MODUs Introduction Typical methods for deployment and retrieval of Stevpris anchors with an anchor handling vessel (AHV) are described, focusing on the use of chasers for
More informationSYNTHETIC LIFTING SLINGS HEAVY LIFT.
SYNTHETIC LIFTING SLINGS HEAVY LIFT. 2 CONTENTS LANKHORST ROPES THE VITAL CONNECTION LANKHORST ROPES FOR SYNTHETIC LIFTING SLINGS ROPE SELECTION 3 5 6 Technical and commercial modifi cations are subject
More informationFully Submersible Heavy Lift Vessel
Fully Submersible Heavy Lift Vessel Arnbjorn Joensen Aberdeen Maritime Branch (28th January 2015) PRESENTATION Introduction to the Subsea Deployment Vessel Installation method Tank test video Potential
More informationDynamic Positioning Control Augmentation for Jack-up Vessels
DYNAMIC POSITIONING CONFERENCE October 9-10, 2012 Design and Control Session Dynamic Positioning Control Augmentation for Jack-up Vessels By Bradley Deghuee L-3 Communications 1 Introduction Specialized
More informationBuckingham Mfg. Co., Inc. OX BLOCK TM Instructions and Warnings
OVERVIEW The Buckingham OX BLOCK is a rope snatch block with an integrated friction bar used for lowering loads, snubbing loads, and raising loads. It allows the rigging professional to handle loads with
More informationGENERAL GUIDELINES FOR PROPER RIGGING PRACTICES AND INSPECTION & REMOVAL CRITERIA FOR SLINGS PER OSHA
GENERAL GUIDELINES FOR PROPER RIGGING PRACTICES AND INSPECTION & REMOVAL CRITERIA FOR SLINGS PER OSHA 1910.184 SAFE OPERATING PRACTICES -.Whenever any sling is used, the following practices shall be observed:
More informationRESULTS FROM PARACHUTE SEA ANCHOR DRAG TESTS FOR A SPACE CAPSULE, Jan. 10, 2013
FIORENTINO Technical Report FPA-152 Report Prepared for: America s next generation of spacecraft A spacecraft can be a diameter of 16.5-foot and weigh 18,000 lbs. at splashdown. When the parachute sea
More informationVESSEL MOORING SYSTEM
VESSEL MOORING SYSTEM Photo courtesy of GOLAR LNG PROVEN LONG-TERM RELATIONSHIPS Chevron BP Shipping BW Fleet Management MOL Teekay NYK and more THE SAMSON MOORING ADVANTAGE 2 MOORING SYSTEM SELECTION
More informationRisk Reduction in Offshore Decommissioning Chevron s Success in the Gulf of Mexico
Risk Reduction in Offshore Decommissioning Chevron s Success in the Gulf of Mexico Lew Dennis Decommissioning Manager Chevron Gulf of Mexico Business Unit 1 Key Messages Focusing on Risk Reduction in Decommissioning
More informationMinimal Structures for Marginal Nova Scotia Developments
Minimal Structures for Marginal Nova Scotia Developments May 12, 2009 Cameron Dunn Martec is a member of the Lloyd s Register Group 1 2 Minimal Structures Project NSDOE working to make the Nova Scotia
More informationRPSEA UDW Forum June 22 & 23, Secure Energy for America
RPSEA UDW Forum June 22 & 23, 2010 Secure Energy for America PROJECT TEAM RPSEA Operator Advisory Committee Anadarko Chevron Shell ConocoPhillips Subcontractors IntecSea NOV CTES General Marine Contractors
More informationPhoto Brian Gauvin THE ULTIMATE TUG SYSTEM
Photo Brian Gauvin THE ULTIMATE TUG SYSTEM THE SAMSON TUG ADVANTAGE 2 TUG SYSTEM SELECTION Not an off-the-shelf decision The tow rope is arguably the single most important piece of equipment in the industry.
More informationBuckingham Mfg. Co., Inc. OX BLOCK TM Instructions and Warnings
OVERVIEW The Buckingham OX BLOCK is a rope snatch block with an integrated friction bar used for lowering loads, snubbing loads, and raising loads. It allows the rigging professional to handle loads with
More informationACCESS the BLUE ECONOMY ALL OCEANS Engineering Ltd
Subsea Expo 2018 ROV Conference 07.02.2018 ACCESS the BLUE ECONOMY The BLUE ECONOMY - DEFINITION The Blue Economy is a book by Gunter Pauli publish in 2010 based on the idea that he developed in 2004 In
More informationOcean Observatories Initiative (OOI) Moorings: New Capabilities for Seagoing Science
Ocean Observatories Initiative Ocean Observatories Initiative (OOI) Moorings: New Capabilities for Seagoing Science presented by Ed Dever and Walt Waldorf November 20, 2014 OOI Science Themes Coastal and
More informationSafety and Risk Engineering. HSE Case Implementation Clive Rawson
Safety and Risk Engineering HSE Case Implementation Clive Rawson Purpose ALARP Risk Assessment Major Accident Events Bowties Safety Critical Systems Performance Standards Implementation Getting HSE Case
More informationA hose layline contains important information for specifying the replacement assembly: manufacturer, hose trade name, working pressure and hose ID.
CONTENTS Introduction Pressure Pressure Drop Temperature Rating Bend Radius Conclusion Additional Information SIDEBAR: Understanding Hydraulic Hose Reinforcement INTRODUCTION Hydraulic hose has a finite
More informationIntroduction. DEEPWATER DRILLING RISER INTEGRITY - FATIGUE, WEAR, INSPECTION AND MONITORING by Dr Hugh Howells and Dave Walters 2H Offshore Inc
DEEPWATER DRILLING RISER INTEGRITY - FATIGUE, WEAR, INSPECTION AND MONITORING by Dr Hugh Howells and Dave Walters 2H Offshore Inc Presented at OMAE, New Orleans, February 2000 Introduction Characteristics
More informationKATRADIS MARINE ROPES INDUSTRY S.A.
KATRADIS MARINE ROPES INDUSTRY S.A. USER S MANUAL MOORING TAILS -NIKA-Nylon -NIKA-Polyester -Mixed Polyester/Nikasteel REV 1.0 Page 1 USER S MANUAL The use of mooring tails is highly recommended with low
More informationProof load is the load applied in performance of a proof test. Proof test is a nondestructive tension test performed by the sling manufacturer or an
1910.184 Slings (a) Scope. This section applies to slings used in conjunction with other material handling equipment for the movement of material by hoisting, in employments covered by this part. The types
More informationPermanent buoyancy systems. matrix composites & engineering
Permanent buoyancy systems matrix composites & engineering Contents Permanent buoyancy systems 3 Materials qualification testing 4 Distributed buoyancy clamping system 5 Buoyancy building block system
More informationSensor Platform Project Marine Trials Bidders Conference. Fundy Ocean Research Center for Energy fundyforce.ca
Sensor Platform Project Marine Trials Bidders Conference Fundy Ocean Research Center for Energy fundyforce.ca 1 Project Team FORCE OceanWorks International Preliminary Design, Operational Procedures Murray
More informationLifting Slings. Before equipment use, please read this operation manual carefully. Serial Number: Date Purchased:
Lifting Slings OPERATION MANUAL This operation manual is intended as an instruction manual for trained personnel who are in charge of installation, maintenance, repair etc. Before equipment use, please
More informationAbrasion and Fibre Fatigue in High Performance Synthetic Ropes for Ship Escort and Berthing
Day 3 Paper No. 4 Abrasion and Fibre Fatigue in High Performance Synthetic Ropes for Ship Escort and Berthing Terry Crump,, Dennis Sherman & Rafael Chou, Samson, USA SYNOPSIS High Modulus PolyEthelene
More informationRAMSTM. 360 Riser and Anchor-Chain Integrity Monitoring for FPSOs
RAMS 360 Riser and Anchor-Chain Integrity Monitoring for FPSOs Introduction to RAMS Tritech s RAMS is a 360 anchor-chain and riser integrity monitoring system for Floating Production Storage and Offloading
More informationTension Technology International. Tension Technology International Ltd REPORT MV NORTHERN FAITH
Ltd REPORT MV NORTHERN FAITH VISUAL EXAMINATION AND TENSILE TESTING OF A FAILED MOORING LINE TO ESTABLISH THE CAUSE OF FAILURE For Federal Bureau of Investigation of Maritime Casualty Investigation FBMCI
More informationDrilling riser buoyancy systems. matrix composites and engineering
Drilling riser buoyancy systems matrix composites and engineering The world s most advanced As exploration depths get ever deeper, only the very best will do. Matrix s drilling riser buoyancy systems lead
More informationFully Submersible Heavy Lift Vessel
Fully Submersible Heavy Lift Vessel Arnbjorn Joensen Oil and Gas Authority (OGA) (15th February 2016) CONTENT Leadon structures demobilisation Competitiveness (case studies) Decommissioning options Installation
More informationDevelopment of a New Deep-Water Riser System. Daniel Karunakaran Subsea 7
Development of a New Deep-Water Riser System Daniel Karunakaran Subsea 7 Introduction Grouped SLOR TM is an open bundle riser solution developed by Subsea 7 and 2H Offshore Array of close standing SLOR
More informationVESSEL MOORING SYSTEM
VESSEL MOORING SYSTEM Photo courtesy of GOLAR LNG PROVEN LONG-TERM RELATIONSHIPS Chevron BP BW Fleet Management MOL NYK and more THE SAMSON MOORING ADVANTAGE MOORING LINE SELECTION Not an off-the-shelf
More informationTHE ULTIMATE TOWING SYSTEM
THE ULTIMATE TOWING SYSTEM Photo Brian Gauvin THE SAMSON TUG ADVANTAGE Photo Brian Gauvin 2 TOWING SYSTEM SELECTION Not an off-the-shelf decision The tow rope is arguably the single most important piece
More informationCORPORATE SAFETY MANUAL
CORPORATE SAFETY MANUAL Procedure No. 32-0 Revision: Date: May 2005 Total Pages: 10 PURPOSE To provide general guidelines for the inspection of all ropes, chains, cables, slings, etc. used for personnel
More informationlifting.com.au Fibre Ropes for Mining, Industrial & Marine Applications
lifting.com.au Fibre Ropes for Mining, Industrial & Marine Winchline Rope (UHMwPE) Donaghys Winchline is made from high strength UHMwPE (Ultra High Molecular weight Polyethylene) fibres which have a very
More informationPresented to the International Technical Rescue Symposium, November Abstract
Presented to the International Technical Rescue Symposium, November 21 Presented by: Chuck Weber, PMI Quality Manager Abstract This paper presents the results of 162 individual drop tests performed at
More informationDeepwater Floating Production Systems An Overview
Deepwater Floating Production Systems An Overview Introduction In addition to the mono hull, three floating structure designs Tension leg Platform (TLP), Semisubmersible (Semi), and Truss Spar have been
More information