Analysis of Offshore Drilling's Vertical Load Using Semi-Submersible Rig

Herianto, Topan (2017) Analysis of Offshore Drilling's Vertical Load Using Semi-Submersible Rig. Journal of Subsea and Offshore, 12. pp. 1-8. ISSN 2442-6415

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In offshore drilling, requires an analysis of buoyancy which is owned by the rig. The magnitude of the platform’s buoyancy was affected by the volume of total column which are submerged below sea level. The more volume columns submerged the more stable the platform rig stands. The buoyant force will hold two loads on the rig, the static load and dynamic load. Static load is the overall load of the rig, while the dynamic load is a load of the drillstring to be used in the drilling process. Maerks discoverers a semi-submersible rig with 4 columns and will conduct offshore drilling in the Gulf of Mexico. The planned target depth is 18,000 ft (True Vertical Depth), with drillpipe length for 12,000 ft and 6,000 ft drillcollar. With the formation pressure gradient of 0,465 psi/ft, the density of the mud is 10.54 ppg. Drilling is done with 4 drilling trajectory. It is also use ORQ mooring chain type with a diameter of 2 ¾ "by 4 units that have a tension load of 880 tons that can hold the submerged part so that a constant column during the drilling process that is as high as 15 m.

Item Type: Article
Subjects: T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering, Science and Mathematics > School of Civil Engineering and the Environment
Depositing User: Ir.Drs Herianto Topan
Date Deposited: 23 Apr 2019 04:52
Last Modified: 23 Apr 2019 05:51

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