Offshore crane types

An offshore crane is defined as a pedestal-mounted elevating and rotating lifting device used to transfer materials and personnel to or from marine vessels, barges and structures, according to API Spec 2C, a standard used to design and manufacture offshore cranes. These offshore applications include bottom-supported, floating platform and ship-hulled vessels used in production and drilling operations, shipboard applications and heavy-lift applications.

The offshore oil and gas industry was established in with the first fixed platform installed near Morgan City, Louisiana in the Gulf of Mexico. The only cranes available for use on these early platforms were existing land-based construction machines with a tonnage naming convention based on maximum structural capacity, i.

Unlike the land based cranes, offshore cranes are fixed structures incapable of moving with their loads. However, customers often make inquiries along the lines of, "We need a ton crane". The next question becomes, "What is the definition of an ton offshore crane?

Because the offshore crane is a fixed structure, the distance from the crane at which the load is lifted is just as important as the magnitude of the load. Consequently, the load capacity for supply boat lifts offboard are generally lower than those associated with lifting off the deck of the facility onboard.

Crane vessel

An offshore crane's capacity also depends on factors the purchaser must supply to the crane manufacturer. These include the type of structure upon which the crane is mounted i.

Offshore cranes can also be classified by duty cycle or the frequency of their use. The duty cycles include:. For many years, cranes were supported on their foundations by roller bearings at their bases and are still commonly used on production duty applications.

For more information, review our technical paper Fixed vs. Variable Displacement Hydraulic Systems. The suspension wire rope runs from sheaves in the gantry directly to sheaves in the boom tip. The advantage of this approach is that it puts less dynamic loading into the sheaves, but it requires longer wire rope, making rope replacement cost more. The suspension wire rope runs from sheaves in the gantry to a suspended sheave cluster which attaches to the boom tip with static links or cables. The advantage is that it requires less wire rope, but heavy duty steel sheaves and bearings should accompany this arrangement.

Phone: Crane Basics An offshore crane is defined as a pedestal-mounted elevating and rotating lifting device used to transfer materials and personnel to or from marine vessels, barges and structures, according to API Spec 2C, a standard used to design and manufacture offshore cranes.

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Duty Cycles Offshore cranes can also be classified by duty cycle or the frequency of their use. The duty cycles include: Production Duty: annual operating time of hours, typically on bottom-supported production platforms Intermediate Duty: annual operating time of 2, hours, typically on bottom-supported or floating platforms with temporary rigs Drilling Duty: annual operating time of 5, hours, typically on MODUs or floating structures that operate full time Production Duty Intermediate Duty Drilling Duty.

Methods Of Crane Support For many years, cranes were supported on their foundations by roller bearings at their bases and are still commonly used on production duty applications. Roller Bearing Type Cranes The revolving superstructure bolts on top of the roller bearing Roller bearing subject to full overturning moment from weight of load, the crane itself and boom Failure of bolts or the slew roller bearing can and has led to loss of operator, crane from its mount On floating applications, the bearing is subjected to load cycles from the crane self-weight and installation motions even when the crane isn't in use Replacement is costly and difficult to accomplish offshore back to top.

Conventional Production Duty "Works in the Drum" Winches Planetary reduction gearing and static brake mechanisms mounted inside the drum barrel Winch must be removed from its mount and completely disassembled for inspection or replacement of the brake, gearing and other load transmitting components Manufacturers of this type of hoist typically mandate periodic removal and internal inspection Both the hydraulic dynamic brake and the mechanical brake are located at the input, so a single internal failure in the driveline can render both brakes ineffective back to top.

Hydraulic System Types Fixed Displacement Offshore crane mounted on fixed structure typically operates for hours per year Marine crane used to support drilling operations typically accumulates 3, hours per year Fixed displacement gear type hydraulic system works well for many years on fixed platform given low cumulative hours Because of the cumulative hours and number of hours run during drilling cycle, fixed displacement gear type hydraulic system provides limited service life and performance on a drilling support crane back to top.

Approximately 72 dba vs. Boom Support Types Continuously Reeved The suspension wire rope runs from sheaves in the gantry directly to sheaves in the boom tip. Pendant and Bridle The suspension wire rope runs from sheaves in the gantry to a suspended sheave cluster which attaches to the boom tip with static links or cables.There are various types of cranes used in civil engineering construction works.

A crane is a piece of heavy machinery that is a tower or platform that is equipped with cables and pulleys. They are used to lift and lower materials. The most common use of cranes is in the construction industry and heavy equipment manufacturing. The types of cranes used in construction are generally temporary structures and will be either fixed to the ground or mounted on a vehicle. The operator can control the crane from inside a cab that moves with the crane, by radio controls or by a push button pendant control station.

Crane operators have to be able to fully operate the crane. Some operators are trained only on one specific type of crane, while others will learn how to operate two to three.

A crane operator is paid well for their knowledge and ability to operate the heavy machine. Different types of cranes are used under different circumstances and environment.

Here are 7 crane types that are used commonly depending on the project, work objective and environment. A telescopic crane offers a boom that has a number of tubes that are fitted inside each other. Then hydraulic mechanisms extend or retract the tubes to length or shorten the boom. This is the most basic type of crane and consists of a steel truss or telescopic boom mounted on some kind of mobile platform. This platform could be wheeled, a rail or even a cat truck.

The boom is hinged at the bottom and can be raised or lowered by cables or hydraulic cylinders. These types of cranes are mounted on a rubber tire truck and provide excellent mobility.

7 Types of Cranes Used In Construction Works

The outriggers will extend vertically or horizontally and are used to stabilize and level the crane when it is hoisting a load of materials. A tower crane is considered to be a modern form of a balance crane. When fixed to the ground, this type of crane will often give the best of height and lifting capabilities.

They are also used when constructing tall buildings. The crane is mounted on an undercarriage that has four rubber tires and is designed to be use off road. The outriggers can extend vertically and horizontally to stabilize and level the crane when it is lifting a large load.

These types of cranes are single engine meaning that the same engine is used to power the undercarriage and the crane. These types of cranes are also known as suspended cranes. They are generally used in a factory and some are able to lift very heavy loads.

The hoist of the crane is set on a trolley that will move in one direction along a beam, sometimes two beams.

They move at angles to the direction along the elevated or ground level tracks. The tracks are usually mounted along the side of an assembly area. This is a hydraulically powered crane that has an articulated arm that is fitted to a trailer.

A loader crane is used to load equipment onto a trailer. The crane can be folded into numerous sections and will fit into small spaces when not in use. The crane can be easily transported because of its capabilities to be folded. Civil engineering uses many different types of cranes during a project. They can be used to move heavy equipment or machinery. Many types of cranes can quickly and easily move equipment into trenches or down steep hills.

They can move large pipes from one place to another. Cranes are beneficial in the construction process for buildings, bridges and overpasses.Crane is a powerful and heavy machine which is used for lifting, lowering of heavy objects, machinery etc with the help of cables and pulleys. They are mostly used in heavy constructions and manufacturing of heavy equipment industries.

There are several types of cranes used in constructions depending on the type of work. Cranes are the most important part of mega project constructions and heavy industries. They did our all hard works in less or no time. Now we can work anywhere with the help of cranes, we can work in the middle of seas, in sky rising building with very ease.

There are several crane types used for different works in different places. Here we will discuss the following crane types in details.

offshore crane types

It is also called crane ship, crane vessel or floating crane. It is mostly used in offshore construction and they are specialized in the lifting of heavy loads.

They can also be used to load or unload ships or lift sunken ships from the water. They are fixed and therefore can not be rotated. They have a large capacity of about tons. Telescopic crane consists of a large boom in which some numbers of tubes are fitted inside with each other.

It increases their height with the help of tubes through the hydraulic mechanism.

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They are especially used to transport goods from one place to another. When it comes to transferring the object to a high place, Telescopic cranes are the best. Because they can adjust their heights according to the place. They can also be used in rescue operations. It is also called mobile harbour or port harbor crane. It is mostly used in sea ports to unload or load the ships.

The flexibility of the machine makes it easy to use it at any place. Its main advantage is, that it is among the powerful material handling cranes. Which means that materials will be transported from one place to another safely and with ease. Crawler crane moves it self with the help of tracks which is also called crawlers. It has many advantages and disadvantages depending on their use.A crane vesselcrane ship or floating crane is a ship with a crane specialized in lifting heavy loads.

The largest crane vessels are used for offshore construction. Conventional monohulls are used, but the largest crane vessels are often catamaran or semi-submersible types as they have increased stability.

On a sheerleg crane, the crane is fixed and cannot rotate, and the vessel therefore is manoeuvered to place loads. As ofthe largest crane vessel in the world is the CNOOC Limited owned Lanjinghaving 3 cranes of capacities tonnes, tonnes and tonnes.

Liebherr - Assembly of a BOS 35000 (Board Offshore Crane)

In medieval Europe, crane vessels which could be flexibly deployed in the whole port basin were introduced as early as the 14th century. During the age of sailthe sheer hulk was used extensively as a floating crane for tasks that required heavy lift. At the time, the heaviest single components of ships were the main masts, and sheer hulks were essential for removing and replacing them, but they were also used for other purposes. Some crane vessels had engines for propulsion, others needed to be towed with a tugboat.

Later it was renamed Crane Ship No. Inthe crane ships a. Their role was to enable the unloading of the Arctic convoys where port installations were either destroyed by German bombers or were non existent as at Bakaritsa quay Archangel. InJ. Ray McDermott had Derrick Barge Four built, a barge that was outfitted with a revolving crane capable of lifting tons. The arrival of this type of vessel changed the direction of the offshore construction industry.

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Instead of constructing oil platforms in parts, jackets and decks could be built onshore as modules. For use in the shallow part of the Gulf of Mexicothe cradle of the offshore industry, these barges sufficed. InHeerema converted a Norwegian tanker, Sunnaasinto a crane vessel with a capacity of tons, the first one in the offshore industry that was ship-shaped.

It was renamed Global Adventurer. This type of crane vessel was better adapted to the harsh environment of the North Sea. InHeerema had two semi-submersible crane vessels built, Hermod and Baldereach with one 2, ton and one 3, ton crane.

Later both were upgraded to a higher capacity. This type of crane vessel was much less sensitive to sea swell, so that it was possible to operate on the North Sea during the winter months. The high stability also allowed for heavier lifts than was possible with a monohull.

The larger capacity of the cranes reduced the installation time of a platform from a whole season to a few weeks. Inspired by this success similar vessels were built. In DB was launched for McDermott, with two cranes with a capacity of 6, tons each. Micoperi ordered M indesigned with two cranes of 7, tons each. However, due to an oil glut in the mid sthe boom in the offshore industry was over, resulting in collaborations.

In Micoperi had to apply for bankruptcy. Saipem — in the beginning of the s a large heavy lift contractor, but only a small player in this field at the end of the s — acquired M from Micoperi inlater renaming it Saipem From Wikipedia, the free encyclopedia. Archived from the original on 21 January Retrieved 10 April November Archived from the original on Retrieved Our commitment to work on continuous product improvement and finding new technical solutions for increasing demands is reflected in our way of working.

We pride ourselves on our reputation as an innovative and reliable partner as evidenced by our extensive track record and the number of long lasting client relationships. We develop and build a wide range of both on- and offshore cranes, varying in size and type. Our crane designs are characterised by increased workability and functionality for the owner.

Increased vessel stability, extended weather window and larger free deck space are examples of the advantages our cranes have to offer. Besides a range of standardised cranes, we have extensive experience in providing tailor made cranes.

Huisman delivers a wide range of Pedestal Mounted Cranes PMC which can be used for various tasks including unloading of supply vessels, offshore installation work, pipe transfer, deck handling and subsea installation. This crane type is designed for oversea transport of large and heavy equipment onboard heavy lift vessels. Due to their capacity, range and structure, the HLMCs, often installed in tandem configuration, are well suited for this specialised use.

The OMC is designed for the use on offshore construction vessels or semi-submersibles. Based on a proven track record in delivering high capacity Heavy Lift Offshore Cranes over the last decades, Huisman offers a range of Tub Mounted Cranes with lifting capacities up to 12,mt.

Proven technology for essential crane components is used in the design of the Tub Mounted Cranes. In order to provide reliable solutions for subsea installation in increasingly deeper water and severe weather conditions, Huisman has developed a full range of Subsea Cranes:.

Hybrid Boom Cranes. Knuckle Boom Cranes. Building on the successful operation of the existing Huisman cranes for the installation of Offshore Wind Turbines, Huisman has introduced a range of cranes tailored to Wind Turbine Installation. Since that first success, several sheerleg orders have been awarded to our company and capacities run up to 4,mt. The Huisman Heavy Lift Ringer Crane is a mobile land crane mounted on a ring construction and designed such that with minor additional components the crane load moment and the lifting capacity can be upgraded.

Huisman delivers a wide range of fully tailor-made cranes for various applications. These cranes are designed and built in close consultancy with our clients in order to meet their specific operational needs. About Huisman. Pedestal Mounted Cranes Huisman delivers a wide range of Pedestal Mounted Cranes PMC which can be used for various tasks including unloading of supply vessels, offshore installation work, pipe transfer, deck handling and subsea installation.

Tub Cranes Based on a proven track record in delivering high capacity Heavy Lift Offshore Cranes over the last decades, Huisman offers a range of Tub Mounted Cranes with lifting capacities up to 12,mt. Offshore Wind Cranes Building on the successful operation of the existing Huisman cranes for the installation of Offshore Wind Turbines, Huisman has introduced a range of cranes tailored to Wind Turbine Installation.Through the status field in the script you can determine when the script has been fully processed and ready to be used.

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To list all the scripts, you can use the script base URL. By default, only the 20 most recent scripts will be returned.

offshore crane types

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offshore crane types

If you try to delete an execution a second time, or an execution that does not exist, you will receive a "404 not found" response. However, if you try to delete an execution that is being used at the moment, then BigML.

offshore crane types

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Offshore crane types