Semi-sub深水半潜式钻井平台技术

深水半潜式钻井平台技术讲座

刘云刚

CNPC 200710 1

讲座内容

–半潜钻井平台的主要组成；

–半潜钻井平台的结构型式演变；

–半潜钻井平台的发展趋势；

–半潜钻井平台的总体布置示例；

–半潜钻井平台的建造和安装；

–半潜平台的锚泊系统计算分析；

–半潜平台的最小气隙计算

–半潜平台的稳定性校核；

CNPC 200710 2

Well system

Drilling Riser

GVA 4500 Drilling Unit (2, built at DSME, 4th

generation)

GVA 7500 Drilling Unit (6, to be built at DSME, 6th

generation)

About160 MODU with many bracings

Semi-submersible

Construction

---On-land Practice

Ulsan, Korea

Transport on Dockwise’s Mighty Servant 3 (14,500 tonnes)

Pontoon block Pontoon ring erection Column blocks →

Erection of column

→

Mating of 17,500 tonnes

Semi-submersible

Construction

---Dry-dock Practice

Hull Fabrication in Dry-dock

Construction methods depend on shipyard conditions

•Marsk Constractor

–Blocks fabricated (pontoons, columns etc.)

–Transported to Caspian Sea

–Assembled on-site

•Small dry-dock

–Two Pontoons fabricated separately

–Connected outside dry-dock

•Two nearby small dry-dock

–One pontoon in each dry dock

–Temporary bracings

–Bracing welded outside dry-dock