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Hydrodynamic Characteristics of Deepwater Drillship for North Sea

북해용 심해 시추 선박의 유체성능 특성 평가

Kim, Mun Sung;Park, Jong Jin;Ahn, Young Kyu;Kim, Hong Su;Chun, Ho Hwan
김문성;박종진;안영규;김홍수;전호환

  • Received : 2014.11.29
  • Accepted : 2015.08.26
  • Published : 2015.08.31

Abstract

With the increases in oil and gas prices, and energy consumption, drillship construction has increased during the last decade. A drillship using a dynamic positioning (DP) system to maintain its position and heading angle during drilling operations. In addition, a drillship is equipped with a moonpool structure to allow its drilling systems to be operated in the midship section. A drillship for the North Sea is specially designed to endure harsh environmental loads. For safe operation in the North Sea, the drillship should have good motion response and robust hull strength. A break water should be considered on the bow and side deck to prevent the green water on deck phenomenon from incoming waves. In addition, the moonpool should be designed to reduce the speed loss and resonance motion. In this study, the hydrodynamic characteristics of a drillship for the North Sea were examined in relation to the motion, wave loads, green water, and moonpool resonance in the initial design stage.

Keywords

Drillship;North sea;Motion;Wave loads;Green water;Break water;Moonpool;Resonance

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