8/10/2019 How to Design Offshore Basket

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How To Design Basket Offshore

May 30th, 2011, InOffshore Container,byadmin

Before we begin, you might want to know what is basket offshore. Basket is a container to

lift equipment and are typically used in the oil drilling area whether onshore or offshore.

Now you know why it is called basket offshore. Usually the equipment that lift with the

basket was the drill pipe, hose, and other supporting equipment for offshore rigs.

In designing basket offshore we use DNV No.2.7-1 Standar for Certification Offshore

Containers April 2006.In designing bakset offshore is not so complicated, there is main key

parameter that must be known, which is the heavy load of equipment to be lifted, usually

called the SWL (Safe Working Load). After we specify the SWL, then we proceed withdesigning the basket with dimensions that match the equipment to be lifted. Weight empty

basketball weve also been through the design and strength analysis process we call it Tare

Mass. Once we know the SWL and Tare Mass, then it is time we set the Rating of these

basket offshore. Where the rating is obtained from summation of SWL with Tare Mass.

I will give the calculation example of the formula described above.

Know the equipment to be transported on a basket offshore is a drill pipe weighing 4000 kg

and length of 6 meters with a diameter of 150 mm, the basket will be shipped 2 sets of drill

pipe. To obtain the appropriate design of the basket, lets do the calculation based on theproblems above.

1. Determine SWL, based on the weight of the load that is 2 times 4000 kg, with 2000 kg

added clearance, then the SWL is 10000 kg.

2. Determine the appropriate dimension to the basket offshore, for 2 sets of drill pipe with

each length of 6 meters and a diameter of 150mm. So the appropriate dimensions are,

length 6500mm Length, 700mm Width, and 900 mm Height.

3. After the basket was designed and has been pass the strength calculation analysis, so we

can calculate the weight of the basket offshore. We take the example for the weight of thisbasket is 2500 kg. Tare mass then this is it.

4. To get the value of the Rating we must Summarize between SWL and Tare Mass. So the

rating is 10000 kg 2500 kg plus or equal to 12500 kg.

This Rating parameters that will be used to perform the next calculation. Which are to

determine the appropriate pad eye dimension, shackles and slings size that will be used for

this basket and to determine the weight of the load test that will be done on the basket.

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