Riser System

 25 November 2021

This is the special topic of TPAO that I participated in voluntarily. The project targets to calculate a riser system designed by first analyzing the anticipated operating circumstances and then doing an engineering analysis to identify characteristics such as maximum and mean tensile, bending, and combined stresses, buoyancy requirements, and top tension requirements. Other crucial considerations for building a riser system include riser length, dimensional requirements (such as bore and wall thickness), internal pressure rating, choke, kill, and auxiliary line standards. The selection of riser components must be carried out in compliance with the riser system requirements once they have been established. I have created an input field to enter several properties, these are:

-The Length of Rotary Kelly Bushing to Datum

-The Length of Rotary Kelly to Diverter

-The Number of Slick Joint in Bottom

-The Number of Slick Joint in Air

-The Number of Riser Tensioner

-The Mud Weight

Figure 1: Input Field




When we are drilling a new well, we have to calculate how many risers we have to run each time. We need the distance of the top of the housing to the RKB to calculate how many risers we need (G). Then, we have to subtract the total fixed distance which includes the height of flex/ball joints inner and outer slip or telescopic joints, and complete BOP from that always (C). We can determine riser string number with divided the rest of the space height by the riser string length. In the case of site-specific space-out, clarification is often required to establish the correct riser string length for the analysis to determine adequate pup joint length. We found the total fixed distance as 173 ft, so our space-out to put risers 6333-173=6160 feet in which riser joints length is 75 ft. When we divide 6160 to75, 82 riser and 10 ft pup joints are found to use to complete our space-out.

Therefore, after entering certain values of the properties,, we got the number of buoyancy risers 2000 ft,
number of buoyancy risers 3000 ft, number of buoyancy risers 4000 ft, number of buoyancy risers 7000 ft, number of slick risers in the bottom, number of slick risers in air, the total weight of BOP landing, load tensioner, the total weight of after BOP landing, load tensioner, which type of pup joint is used, total mud weight in-lb. As you can see below:

Figure 2: Output Field



Location: Üniversiteler, Dumlupınar Blv. 1/6 D:133, 06800 Çankaya/Ankara, Türkiye

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