The document discusses lessons learned from applying a new subdivision standard for jack-up rigs that requires a minimum range of stability after flooding of any single compartment. It was found that stability calculations could unexpectedly terminate before reaching the full range, known as "fading stability curves". This was resolved by returning to fundamental stability principles and developing a new approach using iso-energy contours to visualize the energy required to incline the vessel at different heel and trim combinations. Key findings were that fading stability does not indicate capsizing, and the traditional concept of range of stability is not applicable when such curves occur.
The document discusses the foundation engineering assessment for installing the world's largest jack-up rig offshore Norway. Based on site investigations, the soil conditions varied across the site and consisted of bedrock overlaid by soft silt/clay and a shallow sand layer. Conventional and finite element analyses proposed constructing sand banks to provide a stable foundation. Three-dimensional finite element modeling of the integrated jack-up structure, skirted spudcan foundations, and soil was used to determine the optimal sand bank geometry. The modeling showed structural forces would remain acceptable during installation, preloading, and storm conditions. The rig was successfully installed, validating the engineering predictions.
The document discusses the history and importance of chocolate in society. It details how chocolate originated in Mexico and South America, was popularized in Europe after its discovery by the Spanish, and is now widely consumed globally on a daily basis both in its raw cocoa bean form and in products like chocolate bars. Chocolate has become deeply ingrained in many cultures and traditions over centuries.
The document discusses lessons learned from applying a new subdivision standard for jack-up rigs that requires a minimum range of stability after flooding of any single compartment. It was found that stability calculations could unexpectedly terminate before reaching the full range, known as "fading stability curves". This was resolved by returning to fundamental stability principles and developing a new approach using iso-energy contours to visualize the energy required to incline the vessel at different heel and trim combinations. Key findings were that fading stability does not indicate capsizing, and the traditional concept of range of stability is not applicable when such curves occur.
The document discusses the foundation engineering assessment for installing the world's largest jack-up rig offshore Norway. Based on site investigations, the soil conditions varied across the site and consisted of bedrock overlaid by soft silt/clay and a shallow sand layer. Conventional and finite element analyses proposed constructing sand banks to provide a stable foundation. Three-dimensional finite element modeling of the integrated jack-up structure, skirted spudcan foundations, and soil was used to determine the optimal sand bank geometry. The modeling showed structural forces would remain acceptable during installation, preloading, and storm conditions. The rig was successfully installed, validating the engineering predictions.
The document discusses the history and importance of chocolate in society. It details how chocolate originated in Mexico and South America, was popularized in Europe after its discovery by the Spanish, and is now widely consumed globally on a daily basis both in its raw cocoa bean form and in products like chocolate bars. Chocolate has become deeply ingrained in many cultures and traditions over centuries.
This document discusses steel wire ropes used in offshore oil and gas exploration. It describes anchor lines, drill lines, pennant lines, and other ropes used for offshore mooring and drilling operations. Anchor lines are robust constructions able to withstand deployment and shifting of drilling units. Drill lines are recommended as 6x19/IWRC constructions for raising and lowering drill pipes. Pennant lines experience severe operating conditions during anchor recovery.
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive function. Exercise causes chemical changes in the brain that may help protect against mental illness and improve symptoms.
Guidelines for marine lifting operation noble dentonOFFSHORE VN
1. This document provides guidelines for approving marine lifting operations using floating crane vessels or land-based cranes.
2. It describes Noble Denton's approval process and guidelines for load and safety factors to apply at the design stage.
3. The report also offers comments on practical considerations for managing lifting operations and the information required for approval.
The document provides an overview of offshore platform design. It discusses the different types of offshore platforms including fixed platforms like jacket structures, gravity platforms, and compliant towers as well as floating platforms like tension leg platforms, semi-submersibles, spars, and FPSOs. It describes the key components of offshore platforms including the topside facilities and underwater structures like pilings and mooring systems. The document also covers topics like naval architecture considerations, structural design and analysis, and installation procedures for offshore platforms.
FINITE ELEMENT MODELING AND JACKET LAUCH ANALYSIS USING A BARGEOFFSHORE VN
The document describes a finite element method for numerically simulating the launch of an offshore structure jacket from a barge. Software programs like StruCAD*3D and SACS can be used to model the barge-jacket system and calculate the jacket launch process. The method involves establishing coordinate systems, modeling the barge and jacket geometry, calculating hydrodynamic forces, and solving the equations of motion to obtain the motion of the barge and jacket over time during the different phases of launch. The output provides details on the position, velocity, acceleration and interaction forces acting on the barge-jacket system throughout the simulation.
1) Crosby shackles have the highest design factor in the industry at 6 to 1. Their design ensures strength, ductility, and fatigue properties are met.
2) Crosby shackles are closed die forged which produces consistent dimensions and close tolerance pin holes, improving fatigue life.
3) All Crosby shackle bows and pins are quenched and tempered, enhancing performance in cold temperatures and adverse conditions. This provides properties like strength, ductility, and fatigue resistance.
Wim de Boom of GustoMSC gave a presentation at the Offshore Wind Power Conference about promising offshore wind turbine installation techniques. GustoMSC designs offshore jack-up vessels and cranes for the installation of offshore wind turbines. Some key innovations discussed were double acting jacking systems for quicker installation, slender cranes with tall booms optimized for lifting wind turbines, and specialized handling tools. The presentation also covered trends toward installing larger turbines and in deeper waters.
Shackles are used in lifting and static systems to connect components like wire rope, chain, and fittings. Screw pin shackles are used for non-permanent applications, while safety bolt shackles are used for permanent applications or where loads may slide and rotate the pin. Van Beest offers a wide range of shackles from 0.33 to 1500 tons working load limit in various designs, materials, finishes, and certifications. Shackles must be inspected regularly and used correctly to avoid damage or failure from misuse.
This document discusses steel wire ropes used in offshore oil and gas exploration. It describes anchor lines, drill lines, pennant lines, and other ropes used for offshore mooring and drilling operations. Anchor lines are robust constructions able to withstand deployment and shifting of drilling units. Drill lines are recommended as 6x19/IWRC constructions for raising and lowering drill pipes. Pennant lines experience severe operating conditions during anchor recovery.
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive function. Exercise causes chemical changes in the brain that may help protect against mental illness and improve symptoms.
Guidelines for marine lifting operation noble dentonOFFSHORE VN
1. This document provides guidelines for approving marine lifting operations using floating crane vessels or land-based cranes.
2. It describes Noble Denton's approval process and guidelines for load and safety factors to apply at the design stage.
3. The report also offers comments on practical considerations for managing lifting operations and the information required for approval.
The document provides an overview of offshore platform design. It discusses the different types of offshore platforms including fixed platforms like jacket structures, gravity platforms, and compliant towers as well as floating platforms like tension leg platforms, semi-submersibles, spars, and FPSOs. It describes the key components of offshore platforms including the topside facilities and underwater structures like pilings and mooring systems. The document also covers topics like naval architecture considerations, structural design and analysis, and installation procedures for offshore platforms.
FINITE ELEMENT MODELING AND JACKET LAUCH ANALYSIS USING A BARGEOFFSHORE VN
The document describes a finite element method for numerically simulating the launch of an offshore structure jacket from a barge. Software programs like StruCAD*3D and SACS can be used to model the barge-jacket system and calculate the jacket launch process. The method involves establishing coordinate systems, modeling the barge and jacket geometry, calculating hydrodynamic forces, and solving the equations of motion to obtain the motion of the barge and jacket over time during the different phases of launch. The output provides details on the position, velocity, acceleration and interaction forces acting on the barge-jacket system throughout the simulation.
1) Crosby shackles have the highest design factor in the industry at 6 to 1. Their design ensures strength, ductility, and fatigue properties are met.
2) Crosby shackles are closed die forged which produces consistent dimensions and close tolerance pin holes, improving fatigue life.
3) All Crosby shackle bows and pins are quenched and tempered, enhancing performance in cold temperatures and adverse conditions. This provides properties like strength, ductility, and fatigue resistance.
Wim de Boom of GustoMSC gave a presentation at the Offshore Wind Power Conference about promising offshore wind turbine installation techniques. GustoMSC designs offshore jack-up vessels and cranes for the installation of offshore wind turbines. Some key innovations discussed were double acting jacking systems for quicker installation, slender cranes with tall booms optimized for lifting wind turbines, and specialized handling tools. The presentation also covered trends toward installing larger turbines and in deeper waters.
Shackles are used in lifting and static systems to connect components like wire rope, chain, and fittings. Screw pin shackles are used for non-permanent applications, while safety bolt shackles are used for permanent applications or where loads may slide and rotate the pin. Van Beest offers a wide range of shackles from 0.33 to 1500 tons working load limit in various designs, materials, finishes, and certifications. Shackles must be inspected regularly and used correctly to avoid damage or failure from misuse.
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