Subsea Heave Compensators. Bob Wilde - InterMoor Jake Ormond- InterMoor. Deep Offshore Technology
|
|
- Warren Goodwin
- 5 years ago
- Views:
Transcription
1 Subsea Heave Compensators Bob Wilde - InterMoor Jake Ormond- InterMoor Deep Offshore Technology Abstract In an effort to expand InterMoor s Subsea installation business and the Back of the Boat services we offer to our clients, we have discovered a need for an enhanced version of our existing Subsea Compensators. The current units that we operate work well for the sea states in the GOM but are not well suited for most installation work in other markets such as West Africa and Brazil. In these areas they experience large swells with long periods between, which encouraged us to develop a compensator that is more versatile in any situation. The new units we are developing will have a much better reaction to these sea states and offer several improvements. These units are depth compensated, subsea adjustable and can be hydraulically locked during deployment. They can also be deployed and recovered over a stern roller. This allows a much broader range of applications and vessels for which these units can be utilized. The first prototype unit (15 ton working load) has been completed and is in the final stages of testing. Engineering has already begun on two 75 ton units to be built early 2009.
2 Introduction The InterMoor Subsea Compensation System (ISCS) is a vertical in-line passive heave compensator. It is an installation tool designed to compensate (i.e. minimize) vertical heave during sensitive installation of subsea equipment in an offshore environment. The vertical heave source is typically generated by an installation vessel s stern motion or crane tip motion depending on deployment method. The ISCS is an in-line tool and therefore is designed to follow the payload subsea to the installation site near the sea floor. The ISCS is designed to operate in air or in water at depths up to 10,000 ft. InterMoor has investigated the various forms of compensators available. A void in the market exits for compact and easily mobilized heave compensators that can be used on a variety of installation vessels. InterMoor began a development program in mid-2007 to design, build and test a concept developed in-house for a novel heave compensation tool. In November of 2008, a successful test of the ISCS was completed offshore in the Gulf of Mexico from the M/V DMT Emerald. The purpose of this paper is to summarize the ISCS concept, the alternatives, the test program, the test results and the future of the ISCS. Alternatives The heave compensation market consists of two primary types of heave compensation systems: Passive and Active systems. Passive systems generally have some type of spring (typically pressurized gas) that is adjusted prior to deployment; the unit functions independently with no significant power requirement during the decent of the object being lowered. Active systems are compensators that sense movement of the vessel and then use external power to compensate for that movement. For example, if an active system sensed that the crane tip was rising, the compensator would pay out on the crane line an appropriate amount to compensate for the crane tip s vertical heave. The principles of passive heave compensation are described in detail later in this document. There are also variations or combinations of the two. For example: Active systems that use passive systems as the underlying system to reduce power requirements and actively controlled passive systems that make minor adjustments to the passive system to achieve higher performance.
3 Generally, active systems have the potential to provide the most heave compensation. Good systems can limit heave into the high 90 percentile. The cons to an active system are the higher cost and, typically, lack of portability. An active heave compensation device is normally integral to either a pedestal crane or winch, both of which are generally not easily moved. Shell Oil and Gas developed a Heave Compensation Lowering System (HCLS) that uses buoyancy modules along with chain to create a neutrally buoyant system that acts as a spring isolation device. The spring is the combination of the buoys and the chain in a lazy-s configuration. The heave of the vessel passes through the belly of the chain and the load variation seen by the buoys if very small (effectively half the wet weight of the chain picked up or paid out). The system has a very large natural period and therefore the system has a very effective spring isolation effect. There are some significant draw backs to the HCLS system, however. The system has a lot of constraints that are created by its operational limitations. The buoys sizes for large payloads become extremely large and having such large buoys subsea below installation vessels and drilling rigs is very dangerous. If the rigging fails, the impact of the buoys on the surface vessel could penetrate the hull of the vessel or drilling rig. The system cannot be deployed in less than 1000 ft of water easily because of the large lengths of chain required to make the system work correctly. The potential for entanglement during deployment is always a risk; when it occurs, catastrophic failure (i.e. loss of payload) has often followed. In summary, HCLS is a very effective method that comes with some very high associated risks. Other basic nitrogen over oil passive spring isolators exists in the market for rental or sale. These basic systems have two major shortcomings: a) They are affected by a net hydrostatic pressure on the hydraulic rods that tends to close the rods at depth. Such units are operationally limited in deep water applications. b) They are ineffective in long period seas (i.e. swell). A good passive system can achieve 80 to 90% spring isolation. The ISCS is a novel approach to nitrogen over oil spring isolators in that features have been incorporated to eliminate the rod hydrostatic effect and to obtain the very low effective spring stiffness needed to achieve spring isolation in long seas.
4 Spring Isolation Theory The ISCS uses the principles of spring isolation to generate a net heave compensation effect or spring isolation effect [1]. The tool is a nitrogen over oil spring dampening device. For spring isolation to occur, the natural period of the spring-mass system must be greater than the forcing heave period. Spring isolation begins to occur when the natural period of a system is times greater than the forcing heave period. Spring isolation theory for regular waves is used to assess the performance for varying situations. Though this theory is meant for regular waves, it typically is useful to estimate nominal performance in irregular waves. The ISCS uses the theory of spring isolation to provide a tool that can allow the operator to use it in a variety of stiffness and damping modes appropriate for different situations. Spring isolation is demonstrated graphically by plotting transmissibility (TR) as a function of normalized wave period in Figure 1. The x-axis is the ratio of natural period over forcing period (Beta) and the y-axis is the ratio of the heave of the compensated payload verses the forcing heave (TR). Resonance occurs when the forcing period equals the natural period (Beta = 1). Spring isolation, defined by the isolation of heave occurs when the natural period is the square root of 2 times larger than the forcing period. An effective passive heave compensator moves the natural period at a minimum to twice the forcing period. ISCS Concept and Functionality The ISCS concept was developed with the knowledge of the shortcomings of many standard passive systems. The functionality built in to the ISCS is there to allow the installer to overcome many of the variables associated with using a passive heave compensator. It should be noted, that although the ISCS is a deployable unit that is designed to descend with the object being lowered, it is possible to have a passive compensator fixed on the deck of a vessel. Generally, the lowering wire is run through a set of sheaves connected to the compensator rods; such configurations can increase effective stroke and eliminate the need for the compensator housings to move with the wire. The difficulty associated with these systems is that they become very large, and the weight of the lowering wire becomes a variable to which the high pressure gas system must be adjusted to constantly in order to allow for the additional weight. The amount of deck
5 space required for such systems limits the amount of usable space on a deck and increases the amount of risk associated with handling equipment on deck. The choice to go subsea with the ISCS heave compensator eliminated many of the issues associated with a deck mounted passive heave compensator. By having the heave compensator travel subsea, the compensator is no longer impacted by the length of wire deployed and the deck space used by the equipment is much less. However, new issues arise when a hydraulic type compensator is introduced to a subsea environment. These are the typical issues with traveling subsea, but the most significant is the hydrostatic pressure and its effect on a hydraulic rod. A hydraulic/gas system requires a specific pressure charge to give the correct static load when the hydraulic rod is extended half way or mid-stroke. The hydrostatic pressure at varying depths forces certain design and operational constraints on a simple hydraulic spring damper device. Prior art heave compensators using spring isolation theory and hydraulic spring dampers do exist. The difficulties with these types of compensators are the effect that hydrostatic pressure has on the units. The hydrostatic pressure has a net effect on the piston rod calculated by the hydrostatic pressure times the piston rod area. This net load compresses the rod as the compensator is lowered to depth. Furthermore, this hydrostatic pressure limits the unit s ability to soften the spring system to achieve greater spring isolation. The limits imposed by depth effect are primarily due to the sensitivity to external pressure. The flatter the spring curve (i.e. softer), the more sensitive it is to external pressure and the greater chance that errors in mass calculations can render the heave compensator useless. The spring stiffness of the spring damper must be fairly high to allow for the collapsing force generated on the hydraulic rod. Even with a stiff spring, very deep depths become a challenge to balance the forces placed on the rod by manipulating the gas pre-charge. Thus, with standard passive compensators, one has the conflicting requirements of a soft spring for isolation purposes but a stiff spring for hydrostatic rod depth effect. The novel feature of the ISCS is the use of pressure balancing to eliminate the depth effect. A compensating cylinder is added to the tool to eliminate the depth effect. The compensating cylinder uses the piston area ratios to provide a precise amount of back pressure (at any given depth) on the low pressure side of the hydraulic cylinder to offset the load from the high pressure cylinder rod side caused by the external hydrostatic pressure. Figure 2 shows prior art solution to external pressure with the use of a tail rod. The tail rod exerts an equal force to the piston rod and for this reason eliminates
6 the depth effect. Unfortunately, the length of the unit is doubled with this solution. Length is considered a constraint for handling purposes and the tail rod method was not considered feasible. Using the compensator cylinder on the ISCS allows for a depth compensation to occur without adding to the length of the unit. The back pressure created by the compensating rod and piston equals the pressure created by the main rod and piston. Figure 3 is a schematic of the ISCS functionally showing how the compensating cylinder removes the hydrostatic effect on the main cylinder. With depth compensation added to the spring isolator, it now becomes feasible to increase the nitrogen volume significantly to make the spring much softer. The increase in the volume of nitrogen has the net effect of increasing the length of the natural period. The theory of spring isolation tells us that the greater the natural period of the compensator in relation to the forcing period (heave response period of the vessel) the greater the spring isolation will be. The compensating cylinder allows significantly softer spring rates and therefore much more efficient compensation and spring isolation. The ISCS has a primary accumulator and two (2) additional Air Pressure Vessels (APV). The natural period of the compensator with both APVs open is approximately 20 seconds. Spring isolation theory also suggests that dampening is helpful during situations where the forcing period is close to the natural period. The theory also suggests that damping can hinder spring isolation if the natural period is greater than times the forcing period. The ISCS has two dampening settings that can switched subsea; the damping rates of these two settings can be adjusted by changing the size of the orifice plates. Orifice plate change out can only be done with unit on deck. The ISCS has a built in hydraulic lock. The hydraulic lock allows for safe deployment and recovery of the system that minimizes exposure of the hydraulic rod to bending stresses as it is deployed (or recovered) over the stern of the installation vessel. The ISCS has the capability to both charge and discharge the accumulator and APVs. There is enough nitrogen stored onboard the unit to make fine adjustments to the system. The high pressure tank is used to increase pressure to the system and it is also used to retract the rod in order to lock the system for recovery if necessary. There is a discharge tank that will allow for subsea venting in the circumstance that the
7 ambient hydrostatic pressure is higher than the system pressure. The vent tank can be discharged to sea if the hydrostatic pressure is lower than the system pressure. In summary, the ISCS has the ability for subsea adjustment that allows for variable stiffness rates, change of dampening settings and adjustment of pressure. The system is depth compensated such that it is not affected by the hydrostatic pressure on the hydraulic rod. The ISCS is robust and can be safely deployed over a stern roller or over the side with a crane. The locking mechanism allows for deployment where limited hook height is an issue. ISCS Prototype A 15 ton working load limit (WLL) ISCS prototype was built with full functionality and versatility for use as test platform and later use as a small-load operational unit. It is caged in a robust skid frame that allows the unit to be deployed over the stern roller of an anchor handling or construction vessel. The unit has a safe working load of 15 short tons and features 160 inches (4 meters) of stroke. The prototype has a built in ROV panel to allow for subsea adjustment of the ISCS as described above. The ability to make adjustments is considered critical with all of the variables involved (i.e. surface temperature, subsea temperature and margin of error in wet weight of payload). 15 Ton ISCS Prototype Offshore Test In November of 2008, InterMoor was presented with the opportunity to test the ISCS on board the M/V DMT Emerald. The test consisted of simulating a subsea load by filling an large metal basket with 3 ¼ chain. The basket dimensions were 6 ft wide x 12 ft long x 3 ft high. The total dry weight of the basket and chain was approximately 22,000 lbs or 11 short tons. The basket and compensator were both outfitted with instrumentation to record heave motions. The instrumentation was provided by Seatronics. It consisted of a subsea power supply, an accelerometer, a data logger and a ROV switch to activate the system. The data logger recorded the data string output by the accelerometer and attached a time stamp to each data point. The instrumentation for the payload (basket) was placed in a small steel frame and located in the center of the basket. The chain was laced around the instrumentation frame. The instrumentation on the ISCS was mounted inside the pyramid frame on the top of the compensator. Photos of the test setup can be viewed in Figures 4, 5, 6 and 7. Figure 8 shows the unit operating underwater.
8 The M/V DMT Emerald is equipped with a 100 ton multi-purpose tower and a 100 ton knuckle boom crane. The compensator test was conducted from the knuckle boom crane. The payload (basket) was rigged to the bottom of the ISCS. The top of ISCS was rigged to the knuckle boom crane. The locking device on the ISCS was utilized to keep the rod retracted to overboard the basket. Once the ISCS and basket were deployed to depth, the ROV was utilized to unlock the main hydraulic rod and make the necessary adjustments to the ROV panel. Multiple functionality tests were conducted and the ISCS was deployed a total of 3 times (on 3 separate dates). The total subsea time for all three dives added up to approximately 12 hours. The offshore test provided some very valuable data. For very small heaves, less than 1 ft peak to trough, the compensator rod did not move relative to the compensator body. At higher heave amplitudes, the compensator rod began to stoke, the unit performed very well. Compensation on the order of 80 percent was observed corresponding to a transmissibility of 0.2. The higher the heave, the more efficient the unit became. Figure 9 shows a time trace of vertical displacement of the heave compensator and the payload (basket). With the low heave (<1 ft), the transmissibility is seen to equal 1.0 (i.e. TR = 1.0). Once the heave becomes larger than 1 ft, the rod breaks the accumulated static friction (commonly referred to as stiction) at all the systems movable seal surfaces and effectively compensates the object being lowered; in this case the weight basket. The observed performance of the 15 ton ISCS compensator followed well the performance expected using spring isolation theory. Figure 10 shows a time trace of vertical velocity of the compensator and the weight basket. As can be seen from the graph, the docking velocity of the object being lowered is less than 1 ft/sec (0.3 m/s) regardless of the transmissibility. In other words, even when stiction causes the compensator and weight basket to move together, the amplitude was sufficiently low such that the peak harmonic velocity was also low. Lessons Learned Attention was paid to seal selection during the fabrication of the 15 ton ISCS. It was evident during the testing of the unit, however, that there was more static friction (or stiction) in the unit than anticipated. The stiction required a minimum inertial force before the compensator rod would begin moving. The test revealed that while heave
9 was nominally less than 0.5 ft single amplitude, the stiction was not generally overcome and the payload would follow the vertical movement of the ISCS in phase. Above the 0.5 ft single amplitude, the stiction was overcome and the payload and ISCS would move out of phase and the unit would perform very well. An interesting observation during the 15 ton ISCS test was that the larger the amplitude of the heave, the more efficient the ISCS became. The stiction became a smaller percentage of the total unit s resistance to changing direction when the heave was larger and thus stiction became less of a factor. The next generation of compensators will retain all of the operability of the prototype but they will be enhanced with a remote acoustic control package to eliminate the need for ROV contact with the unit. InterMoor is currently working with seal experts to achieve lower static friction characteristics in order to enhance the low heave performance and increase the efficiency of the unit overall. It should be noted, however, the even when the transmissibility of the unit was near 1.0, the maximum velocity, due to the low amplitude, was less than 1 ft/sec (0.3 m/sec); a velocity acceptable for many subsea docking operations. 75 Ton ISCS The successful completion of the 15 ton ISCS test has provided validation of design and confirmed expected performance. The system has been proven and the go-ahead to build the first 75 ton units is under consideration. The engineering work on the 75 ton ISCS was 90 percent complete at the time this paper was written in November Contingent on project approval, InterMoor anticipates delivery of it first 75 ton ISCS in June of Acknowledgments InterMoor wishes to thank Deep Marine Technology for providing access to the DMT Emerald and their assistance in the performance of the offshore tests. Reference [1] Dynamics of Structures, Ray W. Clough & Joseph Penzien; 1975 McGraw Hill Inc.
10 Transmissabliity, TR Compensation begins Period Ratio, Beta Figure 1 Transmissibility vs Beta Figure 2 Tail Rod Depth Compensator
11 Figure 3 Enhanced Compensator Schematic Figure 4 Compensator rigged for lowering
12 Figure 5 Compensator showing weight basket Figure 6 Motion sensor on compensator
13 Figure 7 Motion sensor in weight basket Figure 8 Compensator and basket operating
14 Heave (In) 0 2:52:59 AM 2:53:08 AM 2:53:16 AM 2:53:25 AM 2:53:34 AM 2:53:42 AM 2:53:51 AM 2:54:00 AM Heave Basket(in) Heave Forcing (in) Time Figure 9 Heave vs Time Velocity (ft/s) :52:59 AM 2:53:08 AM 2:53:16 AM 2:53:25 AM 2:53:34 AM 2:53:42 AM 2:53:51 AM 2:54:00 AM Velocity Basket (ft/s) Velocity Forcing (ft/s) Time Figure 10 Velocity vs Time
Fully 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
Impact of Passive Heave Compensator on Offshore Lifting
Journal of Shipping and Ocean Engineering 5 (2015) 166-180 doi: 10.17265/2159-5879/2015.04.003 D DAVID PUBLISHING Impact of Passive Heave Compensator on Offshore Lifting Arvind Keprate Department of Mechanical
Re-usable Riser and Flowline System for Deep Water Application. C. DIEUMEGARD SUBSEA ASIA - 11 th June 2008
Re-usable Riser and Flowline System for Deep Water Application C. DIEUMEGARD SUBSEA ASIA - 11 th June 2008 Table of Contents Flexible Pipe Technology Deep Water Challenges for Riser, Flowline and Umbilical
Deepwater 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
Development 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
SIMOPRO Riser Replacement Novel method for replacement of pliant wave risers whilst continuing production on platform
SIMOPRO Riser Replacement Novel method for replacement of pliant wave risers whilst continuing production on platform Helen Tunander Ocean Installer What is it? Simultaneous Marine Operations and Production
Feasibility of Steel Lazy Wave Risers in the North Sea
NH GRAND HOTEL KRASNAPOLSKY AMSTERDAM 3-5 APRIL 2017 Feasibility of Steel Lazy Wave Risers in the North Sea Rohit Shankaran 2H Offshore Engineering Ltd. Agenda Risers in deepwater North Sea Are steel catenary
Dynamic 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
The SDS Skip. Subsea Deployment Systems Ltd.
The SDS Skip SUBSEA SKIP An alternative to enhance the recovery of structures, spool pieces, mattresses etc. during decommissioning work Can be used to transport complex structures or spool pieces to field
Hydrodynamic Analysis of a Heavy Lift Vessel during Offshore Installation Operations
Presentation for Defense of Master Thesis Hydrodynamic Analysis of a Heavy Lift Vessel during Offshore Installation Operations Speaker: Bin Wang Supervisor: Prof. Robert Bronsart 23 rd Feb, 2015 Nantes
Unit shown in luffer configuration
Transport complete crane with base section, drums with rope and self assembly device, less counterweights at under 100,000 lbs (45 360 kg) Rated capacity limiter with full color graphic display Powerful
DIVERLESS SUBSEA HOT TAPPING OF PRODUCTION PIPELINES
DIVERLESS SUBSEA HOT TAPPING OF PRODUCTION PIPELINES Dale Calkins Senior Project Engineer, TD Williamson Inc Biography Dale Calkins joined TD Williamson Inc in November of 1999 after working as a consulting
COMPAFLOW. Compressed Air. Volumetric flow. Gas. Mass flow. Steam. Net volumetric flow. Liquid
Volumetric flow Compressed Air Mass flow Gas Net volumetric flow Steam Liquid Universal compact orifice flow meter combines a compact orifice flow sensor and sotiphicated converter One-piece flow sensor,
Trim and Stabilisation systems NEXT GENERATION IN BOAT CONTROL.
Trim and Stabilisation systems NEXT GENERATION IN BOAT CONTROL www.humphree.com WHEN EFFICIENCY AND PERFORMANCE REALLY MATTERS! Humphree proudly presents the new HCS-5 The HCS-5 combines exceptional mechanical
The topics I will briefly cover, are; Stack Configurations Wellhead Connector Considerations Control Systems Tensioning Systems will be discussed by
Thank you Greg. 1 The topics I will briefly cover, are; Stack Configurations Wellhead Connector Considerations Control Systems Tensioning Systems will be discussed by Mr. Muhammad Sadiq, however in short,
INCREASE OPERATING DAYS ENHANCE DECK SAFETY AND SPEED MINIMIZE SEA SICKNESS HEAVY DUTY GYROSTABILIZERS FOR COMMERCIAL & DEFENCE APPLICATIONS
LESS MOTION MORE OCEAN HEAVY DUTY GYROSTABILIZERS FOR COMMERCIAL & DEFENCE APPLICATIONS INCREASE OPERATING DAYS ENHANCE DECK SAFETY AND SPEED MINIMIZE SEA SICKNESS 2 VEEM Gyro DEFENCE Image courtesy of
Fully 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
BACKGROUND TO STUDY CASE
BACKGROUND TO STUDY CASE German Aerospace Center (DLR) is using Andøya Rocket Range for a sounding rocket campaign. On 27th October 2005 a 300 kg payload (SHEFEX) was launched Due do a technical problems
Innovative 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)
Polar Research Vessel Operational Requirements and Summary of Technical Studies
Polar Research Vessel Operational Requirements and Summary of Technical Studies Presentation to UNOLS by Jim St John Science and Technology Corporation - Polar Technology Office Why a New Antarctic Research
Ocean 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
Field Development & Construction
Field Development & Construction Michael Cowie Technical Director Ecosse Subsea Systems Ltd Ambient Lifting: A Real Alternative to Heavy Lift Vessels 4 th February 2016, AECC, Michael Cowie Presentation
Drilling Efficiency Utilizing Coriolis Flow Technology
Session 12: Drilling Efficiency Utilizing Coriolis Flow Technology Clement Cabanayan Emerson Process Management Abstract Continuous, accurate and reliable measurement of drilling fluid volumes and densities
Instrumentation & Data Acquisition Systems
Instrumentation & Data Acquisition Systems Section 3 -Level Robert W. Harrison, PE Bob@TheHarrisonHouse.com Made in USA 1 Level Section Question Which level measuring technology is the best solution when
ACCESS 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
Heavy-duty power for the most demanding jobs
110-ton (99.97 mt) Lattice Boom Crawler Crane Heavy-duty power for the most demanding jobs Transport complete crane with base section, drums with rope and self assembly device, less counterweights at under
New 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,
Design, Building and Teaching with a Hydrostatic and Buoyancy Apparatus
Design, Building and Teaching with a Hydrostatic and Buoyancy Apparatus Mir M. Atiqullah and Norman Russell Southern Polytechnic State University Marietta, GA. ABSTRACT A typical Fluid Mechanics laboratory
250 ton mt Lattice Crawler Crane
250 ton 226.8 mt Lattice Crawler Crane Heavy duty combination top section for conventional and luffing jib configuration Bar pendants & boom walkway 320 hp Cummins QSL9 Tier IV Final Transport weight is
Geo-Vibro Corer
High Frequency Vibro Coring System Operational Features Proven performance & high quality cores 30 kn impulse at 30 Hz for fast penetration Reliable, lightweight & cost effective Modular construction (cores
Digiquartz Water-Balanced Pressure Sensors for AUV, ROV, and other Moving Underwater Applications
Digiquartz Water-Balanced Pressure Sensors for AUV, ROV, and other Moving Underwater Applications Dr. Theo Schaad Principal Scientist Paroscientific, Inc. 2002 Paroscientific, Inc. Page 1 of 6 Digiquartz
Offshore Oil and Gas Platforms for Deep Waters
Offshore Oil and Gas Platforms for Deep Waters Atilla Incecik Department of Naval Architecture, Ocean and Marine Engineering University of Strathclyde, Glasgow, UK (atilla.incecik@strath.ac.uk) Summary
A NEW APPROACH TO BUCKLING DETECTION IN OFFSHORE PIPELINE LAYING
A NEW APPROACH TO BUCKLING DETECTION IN OFFSHORE PIPELINE LAYING By Marian Copilet, Durham Pipeline Technology Ltd., Gateshead, UK & Prof. Ernie Appleton, University of Durham 1. ABSTRACT This paper discusses
TLP 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
Sontek RiverSurveyor Test Plan Prepared by David S. Mueller, OSW February 20, 2004
Sontek RiverSurveyor Test Plan Prepared by David S. Mueller, OSW February 20, 2004 INTRODUCTION Sontek/YSI has introduced new firmware and software for their RiverSurveyor product line. Firmware changes
MOTUS Wave Buoys. Powered By the Aanderaa MOTUS Directional Wave Sensor
MOTUS Wave Buoys Powered By the Aanderaa MOTUS Directional Wave Sensor Two Buoys, One Brain The Aanderaa MOTUS directional wave sensor factory calibrated and currently available on two proven buoy platforms:
RPSEA 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
Learn more at
Full scale model tests of a steel catenary riser C. Bridge 1, H. Howells 1, N. Toy 2, G. Parke 2, R. Woods 2 1 2H Offshore Engineering Ltd, Woking, Surrey, UK 2 School of Engineering, University of Surrey,
Edit this text for your title
Edit this text for your title MEK 4450 Marine Operations Edit this text for your sub-title Presenter name, location, date etc. Kværner ASA / DNV, Fall 2013 Lesson 2/3 Lift phases Load out Transportation
NT09-21 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
Truck-mounted Mass Flow Metering for LPG Delivery
Truck-mounted Mass Flow Metering for LPG Delivery Itron, Inc. 1310 Emerald Rd. Greenwood, SC 29646 Introduction The mathematician Gustave De Coriolis first described the Coriolis Effect, which is an inertial
ROV Development ROV Function. ROV Crew Navigation IRATECH SUB SYSTEMS 2010
IR AT EC H SU B SY ST EM S 20 10 Remotely Operated Vehicle ROV INTRODUCTORY 2008 2008 1 KEY POINTS ROV Introductory ROV Development ROV Function Types of ROV ROV Crew Navigation ROV Components 2 ROV Development
Exercise 2-3. Flow Rate and Velocity EXERCISE OBJECTIVE C C C
Exercise 2-3 EXERCISE OBJECTIVE C C C To describe the operation of a flow control valve; To establish the relationship between flow rate and velocity; To operate meter-in, meter-out, and bypass flow control
Figure 1: Hydrostatic Pressure Forces Are Perpendicular to the Surface
Pressure Hulls and Canisters 2 Cornerstone Electronics Technology and Robotics III (Notes primarily from Underwater Robotics Science Design and Fabrication, an excellent book for the design, fabrication,
Full scale VIV response measurements of a drill pipe in Gulf of Mexico loop currents (OMAE )
Full scale VIV response measurements of a drill pipe in Gulf of Mexico loop currents (OMAE2008-57610) Beynet, Shilling, Campbell, Tellier, Howells Estoril Portugal - June 2008 The Test September 2004 Test
Focus on Operational Efficiency and Crew Safety - Introducing Advanced ROV Technology in Marine Towed Streamer Seismic
Focus on Operational Efficiency and Crew Safety - Introducing Advanced ROV Technology in Marine Towed Streamer Seismic R. Tonnessen* (Petroleum Geo-Services) & T. Skadberg (Petroleum Geo- Services) SUMMARY
Presented 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
The Developing Design of the Blowout Preventer in Deep Water
The Developing Design of the Blowout Preventer in Deep Water IADC World Drilling 2011 Conference & Exhibition 15-16 June 2011, Bella Centre, Copenhagen Eric Brown Project Manager National Oilwell Varco
Outside Air Nonresidential HVAC Stakeholder Meeting #2 California Statewide Utility Codes and Standards Program
1 Outside Air Nonresidential HVAC Stakeholder Meeting #2 California Statewide Utility Codes and Standards Program Jim Meacham, CTG Energetics Agenda 2 In Situ Testing Results Reduced Ventilation after
INTRODUCING THE PILLAR BOAT! U.S. Patent No. 9,623,935 ABSTRACT
INTRODUCING THE PILLAR BOAT! U.S. Patent No. 9,623,935 ABSTRACT The need to conduct motion sensitive operations at sea is increasing in the fields of space launch and recovery, oil exploration, aquaculture,
Wire rope lubrication system. Increases wire rope life and reduces lubrication time, lubricant waste and environmental contamination
Wire rope lubrication system Increases wire rope life and reduces lubrication time, lubricant waste and environmental contamination Importance of lubrication The use of lubricant on a steel wire rope considerably
Technical Diving Equipment
POMMEC LARS SYSTEM EASILY CONVERTED TO WET BELL SYSTEM POMMEC 2 DIVER LAUNCH AND RECOVERY SYSTEM WITH DIVING BASKET This Launch and Recovery System is specifically designed to provide a compact option
FAQ MOTS (Momac-Offshore-Transfer-System):
FAQ MOTS (Momac-Offshore-Transfer-System): Features of the boat/vessel needed to carry MOTS: What is the recommended vessel technology for MOTS? MOTS can be installed on every vessel type. MOTS minimum
DP Ice Model Test of Arctic Drillship
Author s Name Name of the Paper Session DYNAMIC POSITIONING CONFERENCE October 11-12, 211 ICE TESTING SESSION DP Ice Model Test of Arctic Drillship Torbjørn Hals Kongsberg Maritime, Kongsberg, Norway Fredrik
FLUID POWER FLUID POWER EQUIPMENT TUTORIAL ACCUMULATORS. This work covers part of outcome 2 of the Edexcel standard module:
FLUID POWER FLUID POWER EQUIPMENT TUTORIAL ACCUMULATORS This work covers part of outcome 2 of the Edexcel standard module: UNIT 21746P APPLIED PNEUMATICS AND HYDRAULICS The material needed for outcome
Development of TEU Type Mega Container Carrier
Development of 8 700 TEU Type Mega Container Carrier SAKAGUCHI Katsunori : P. E. Jp, Manager, Ship & Offshore Basic Design Department, IHI Marine United Inc. TOYODA Masanobu : P. E, Jp, Ship & Offshore
Unit 24: Applications of Pneumatics and Hydraulics
Unit 24: Applications of Pneumatics and Hydraulics Unit code: J/601/1496 QCF level: 4 Credit value: 15 OUTCOME 2 TUTORIAL 9 ACCUMULATORS The material needed for outcome 2 is very extensive so there are
Product Guide. Crawler Crane
Crawler Crane 220 US Tons (100 Metric Tons) @ 16 ft 5 in Radius 285 ft Max Tip (Main Boom) Main Boom, Fixed Jib and Luffing Jib Configurations Product Guide KEY FEATURES ULTRA CAB The Ultra Cab, designed
Inflatable Packer Single & Double. Single & Double Packer Dimension. Wireline Packer. Water Testing Packer (WTP) Packer
Inflatable Packer Single & Double Single & Double Packer Dimension Wireline Packer Water Testing Packer (WTP) Packer Packer Working Pressure & Depth Chart Packer Water Hand Pump Packer Air Driven Pump
Fail Operational Controls for an Independent Metering Valve
Group 14 - System Intergration and Safety Paper 14-3 465 Fail Operational Controls for an Independent Metering Valve Michael Rannow Eaton Corporation, 7945 Wallace Rd., Eden Prairie, MN, 55347, email:
STRIDE PROJECT Steel Risers in Deepwater Environments Achievements
STRIDE PROJECT Steel Risers in Deepwater Environments Achievements 1999-21 Neil Willis Principal Engineer 2H Offshore Engineering 6 th Annual Deepwater Technologies and Developments Conference 21 The presentation
RIGID 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
Product highlights Variable frequency and thrust
Innovative engineering for extreme global environments FT550 - VIBROCORER The 3rd generation FT550 lightweight variable frequency high power vibrocorer leads the market in its technical innovation and
Learn 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
Designing Wave Energy Converting Device. Jaimie Minseo Lee. The Academy of Science and Technology The Woodlands College Park High School, Texas
Designing Wave Energy Converting Device Jaimie Minseo Lee The Academy of Science and Technology The Woodlands College Park High School, Texas Table of Contents Abstract... i 1.0 Introduction... 1 2.0 Test
DETRMINATION OF A PLUNGER TYPE WAVE MAKER CHARACTERISTICE IN A TOWING TANK
The 9 th International Conference on Coasts, Ports and Marine Structures (ICOPMAS 2010) 29 Nov.-1 Dec. 2010 (Tehran) DETRMINATION OF A PLUNGER TYPE WAVE MAKER CHARACTERISTICE IN A TOWING TANK sayed mohammad
Load Controls Screw In Cartridge Valves Pressures to 350 bar (5000 psi) Flows to 190 l/min (50 USgpm)
Vickers Cartridge Valves Load Controls Screw In Cartridge Valves Pressures to 50 bar (5000 psi) Flows to 90 l/min (50 USgpm) Rev. 2/99 722 Contents MODEL DESCRIPTION TYP. APPLICATION PRESSURE bar (psi)
Level MEASUREMENT 1/2016
Level MEASUREMENT 1/2016 AGENDA 2 A. Introduction B. Float method C. Displacer method D. Hydrostatic pressure method E. Capacitance method G. Ultrasonic method H. Radar method I. Laser method J. Level
Learn 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
Pipeline Flooding, Dewatering and Venting Dr Aidan O'Donoghue, Pipeline Research Limited, Glasgow, Scotland
Pipeline Flooding, Dewatering and Venting Dr Aidan O'Donoghue, Pipeline Research Limited, Glasgow, Scotland Abstract Flooding, cleaning, gauging, dewatering and venting of offshore oil and gas pipelines
SBM Installer. Diving Support & Construction Vessel
Diving Support & Construction Vessel New, all-in-one, state-of-the-art installer Safety, versatility and redundancy are the three key concepts to have driven the design of SBM Offshore installation vessels.
ULMATEC LAUNCH AND RECOVERY SYSTEMS
M L U NC LAU MS ERY V ECO DR N HA C E AT TE SYS S R LA ULMATEC LAUNCH AND RECOVERY SYSTEMS Ulmatec develops efficient, safe and robust solutions for handling remotely operated vehicles (ROVs) from ships
U S F O S B u o y a n c y And Hydrodynamic M a s s
1 U S F O S B u o y a n c y And Hydrodynamic M a s s 2 CONTENTS: 1 INTRODUCTION... 3 2 ACCURACY LEVELS... 3 2.1 LEVEL-0... 3 2.2 LEVEL-1... 3 2.3 PANEL MODEL... 3 3 EX 1. SINGLE PIPE. NON FLOODED... 4
International Technical Rescue Symposium Presented by John McKently
Some of the factors affecting pulley efficiency in theoretical and real world rescue systems. International Technical Rescue Symposium Presented by John McKently 2011 It is generally accepted that pulleys
Semi-Submersible Offshore Platform Simulation Using ANSA & META
Semi-Submersible Offshore Platform Simulation Using ANSA & META Offshore platforms are large structures designed to withstand extreme weather conditions and have a lifespan of at least 40 years. Million
ZIPWAKE DYNAMIC TRIM CONTROL SYSTEM OUTLINE OF OPERATING PRINCIPLES BEHIND THE AUTOMATIC MOTION CONTROL FEATURES
ZIPWAKE DYNAMIC TRIM CONTROL SYSTEM OUTLINE OF OPERATING PRINCIPLES BEHIND THE AUTOMATIC MOTION CONTROL FEATURES TABLE OF CONTENTS 1 INTRODUCTION 3 2 SYSTEM COMPONENTS 3 3 PITCH AND ROLL ANGLES 4 4 AUTOMATIC
Wave Motion. interference destructive interferecne constructive interference in phase. out of phase standing wave antinodes resonant frequencies
Wave Motion Vocabulary mechanical waves pulse continuous periodic wave amplitude period wavelength period wave velocity phase transverse wave longitudinal wave intensity displacement amplitude phase velocity
Overview. 2 Module 13: Advanced Data Processing
2 Module 13: Advanced Data Processing Overview This section of the course covers advanced data processing when profiling. We will discuss the removal of the fairly gross effects of ship heave and talk
Offshore platforms survivability to underwater explosions: part I
Computational Ballistics III 123 Offshore platforms survivability to underwater explosions: part I A. A. Motta 1, E. A. P. Silva 2, N. F. F. Ebecken 2 & T. A. Netto 2 1 Brazilian Navy Research Institute,
Observations of Near-Bottom Currents with Low-Cost SeaHorse Tilt Current Meters
DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Observations of Near-Bottom Currents with Low-Cost SeaHorse Tilt Current Meters Vitalii A. Sheremet, Principal Investigator
PHYS 101 Previous Exam Problems
PHYS 101 Previous Exam Problems CHAPTER 14 Fluids Fluids at rest pressure vs. depth Pascal s principle Archimedes s principle Buoynat forces Fluids in motion: Continuity & Bernoulli equations 1. How deep
Lattice Boom Crawler Crane 300-ton (272 mt)
Lattice Boom Crawler Crane 300-ton (272 mt) Wide or narrow gauge patented All hydraulic controls & power Dual cross-section main boom High performance matching main hoists with 28mm rope Tilt cab High
Saab Seaeye Cougar XT Compact
The Seaeye Cougar-XT Compact is a highly flexible and extremely powerful electric ROV with working depths of 300 metres. This system comes with almost all of the specifications of the very reliable Couger-XT
PANACEA P200 STAINLESS STEEL USER MANUAL
Basic Features Stainless Steel body with 1.75 outside diameter. Will fit into wells down to 2 (schedule 80). Has an internal chamber volume of 200mL. Maximum depth below ground surface of 3000ft. Other
Deploying the TCM-1 Tilt Current Meter in an Inverted (Hanging) Orientation By: Nick Lowell, Founder & President
Lowell Instruments Application Note #TCMA Deploying the TCM-1 Tilt Current Meter in an Inverted (Hanging) Orientation By: Nick Lowell, Founder & President 1 Introduction The TCM-1 Tilt Current Meter (TCM)
Stevpris 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
Lattice Boom Crawler Crane 300-ton (272 mt)
Lattice Boom Crawler Crane 300-ton (272 mt) Wide or narrow gauge patented All hydraulic controls & power Dual cross-section main boom High performance matching main hoists with 28mm rope Tilt cab High
PHASE 1 WIND STUDIES REPORT
PHASE 1 WIND STUDIES REPORT ENVIRONMENTAL STUDIES AND PRELIMINARY DESIGN FOR A SUICIDE DETERRENT SYSTEM Contract 2006-B-17 24 MAY 2007 Golden Gate Bridge Highway and Transportation District Introduction
Development of an Oil Delivery System to Create Neutrally Buoyant Oil Plumes
2014 Conference and Exhibition Development of an Oil Delivery System to Create Neutrally Buoyant Oil Plumes Bill Schmidt, Program Manager Dave DeVitis, Test Director MAR Incorporated Acknowledgements U.S.
Tapered Roller Bearings in X-life quality Customer Information. Business Unit TRB Schweinfurt, 2013
Tapered Roller Bearings in X-life quality Customer Information Business Unit TRB Schweinfurt, 2013 X-life roll-out BU TRB Agenda Tapered Roller Bearings in X-life quality 1 2 3 4 X-life what is it? X-life
for Naval Aircraft Operations
Seakeeping Assessment of Large Seakeeping Assessment of Large Trimaran Trimaran for Naval Aircraft Operations for Naval Aircraft Operations Presented by Mr. Boyden Williams, Mr. Lars Henriksen (Viking
PIG MOTION AND DYNAMICS IN COMPLEX GAS NETWORKS. Dr Aidan O Donoghue, Pipeline Research Limited, Glasgow
PIG MOTION AND DYNAMICS IN COMPLEX GAS NETWORKS Dr Aidan O Donoghue, Pipeline Research Limited, Glasgow A model to examine pigging and inspection of gas networks with multiple pipelines, connections and
Subsea Tooling Services Range of Dredgers
Subsea Tooling Services Range of Dredgers Subsea Tooling Services UK Ltd (STS) has a large selection of ROV / Diver operated dredgers. The range includes 3 4 6 8 10 and 12 dredgers. We are confident we
IMCA Competence Assessment Portfolio April 2016
Self- Checklist Entry Level Criteria Acceptance Criteria Attained Completed diver training to IMCA-recognised air diver qualification Passed medical examination for fitness to dive Passed offshore survival
Trifecta Systems. Cryogenic Equipment for High Performance Gas Supply. Trifecta Product Catalog
Trifecta Systems Cryogenic Equipment for High Performance Gas Supply C O N S U LT I N G S Y S T E M D E S I G N I N S TA L L AT I O N C O M M I S S I O N I N G T R A I N I N G Trifecta Product Catalog
INNOVATIVE MOORING SYSTEMS
INNOVATIVE MOORING SYSTEMS VESSEL AUTOMOORING MODULES QUAY AUTOMOORING INSTALLATIONS DOCKLOCK brings mooring to a next level PAGE 2 FOR OVER A CENTURY THE WORLD S LEADING EXPERT IN MOORING, BERTHING AND
FUNDAMENTAL PRINCIPLES OF SELF-OPERATED PRESSURE REDUCING REGULATORS. John R. Anderson Emerson Process Management Fluid Controls Institute
FUNDAMENTAL PRINCIPLES OF SELF-OPERATED PRESSURE REDUCING REGULATORS John R. Anderson Emerson Process Management Fluid Controls Institute For pressure control in process or utility applications, control
TECHNICAL BENEFITS OF CJS / RAISE HSP. Technical Advantages
TECHNICAL BENEFITS OF CJS / RAISE HSP Technical Advantages The HSP is designed for low- to mid- volume applications at flow rates of 1 cubic meter to 30 c. m per day. The benefits are in the details. The
AFT OVERBOARD HANDLING SYSTEM R/V SIKULIAQ Top Level Maximum Capability Document
AFT OVERBOARD HANDLING SYSTEM R/V SIKULIAQ Top Level Maximum Capability Document Manufactured By: XXX Reference Drawing Number: XXX-XXX Prepared By: [Company Name] [Engineer s Name/Stamp] [Date] Page 1
DI-DRO ADVANCED FORMING SYSTEMS
DI-DRO ADVANCED FORMING SYSTEMS WE PARTNER WITH YOU We partner with you to provide force-generating products and solutions to lower your costs and increase your productivity in the forming of manufactured