Analysis of intact and damage stability of jackup rig

  • Ngo Tuan Dung
  • Phan Thanh Son
  • Le Huy
  • Nguyen Van Quan
  • Do Thanh Phuong
  • Tran Cong Thanh
Keywords: Jackup rig, intact stability, damage stability, Tam Dao 05

Abstract

The paper presents both the intact and damage stability criteria and analysis methodology for 400ft Tam Dao 05 Jackup Rig that meets the stability requirements as laid out in the ABS MODU and IMO Rules. The wind force calculation is based on the heel angles together with the drafts for both intact and damaged conditions. The intact stability analyses are computed for field and ocean transits with wind speed of 36m/s (70knots) and 51.5m/s (100knots) respectively, while the damaged stability analyses are computed with wind speed at 25.72m/s (50knots) in both transit conditions.
The paper also illustrates the computer model of a jack-up rig in field and ocean transits condition, the processing of environment data and an analysis of stability by direct integration method, and recommends a stability analysis methodology procedure applicable in practice. Example calculations are presented for the Tam Dao 05 Jackup Rig under the sea conditions of Vietnam.

References

1. Americal Bureau of Shiping (ABS). Rules for building and classing - Mobile offshore drilling units. 2016.
2. Society of Naval Architects and Marine Engineers (SNAME). Site specific assessment of jack-up units. Technical & Research Bulletin 5 - 5A. 2008.
3. GHS. General hydrostatics. www.ghsport.com.
4. Americal Bureau of shiping (ABS). Rules for classification of marine vessels and structure. 2016.
5. Ngô Tuấn Dũng. Nghiên cứu tính toán, phân tích ổn định nguyên vẹn và ổn định có tổn thất giàn khoan tự nâng 400ft trong trạng thái thi công hạ thủy, trạng thái nổi và di chuyển trên biển. Đề tài cấp Nhà nước SPQG.02b.01-KC-05. 2017.
Published
2018-04-30
How to Cite
Dung, N. T., Son, P. T., Huy, L., Quan, N. V., Phuong, D. T., & Thanh, T. C. (2018). Analysis of intact and damage stability of jackup rig. Petrovietnam Journal, 4, 50-56. Retrieved from https://pvj.vn/index.php/TCDK/article/view/364
Issue
Vol 4 (2018)
Section
Articles

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