Winch drums are available in varying sizes. Tiie largest drum, 15 feet 

 in diameter, is used in the mining industry. For the pipe handling unit under 

 consideration, it does not appear that a unit this large will be needed. In all 

 probability, the v^inch unit can be a standard off-the-shelf item. 



Conclusions 



There is substantial evidence to indicate that a considerable portion 

 of the hoisting equipment currently in use is readily adaptable for lifting 

 loads of up to 500 tons in offshore construction. Standard derricks, crown 

 blocks, traveling blocks, tool joints, and draw works will successfully lift a 

 500-ton load. Limited extensions of current technology will provide items 

 of equipment which will permit hoisting loads of up to 600 tons, the 

 arbitrary maximum for this project. 



COSTS OF PIPE HANDLING EQUIPMENT^^ 



The cost estimates are based on the V-150 pipe, 10-3/4 inches in 

 diameter. The following is a rough estimate of the total cost (1964), 

 exclusive of the derrick: 



6,000 ft of pipe at $1,630/100 feet $ 98,000 



Tool joints 1,250 

 Double-drum hoisting unit with motor 



and brake 258,000 

 Crown block, traveling blocks, rope, 



guides, and hoist 177,000 



Makeup and breakout machine 95,000 



Pipe racking and storage units 1 94,000 



26 guide sheaves 1 67,000 



Installation 159,000 



Total $1,149,250 



Estimated cost of derrick 300,000 



Total estimated cost $1 ,449,250 



116 



