Local Analysis of The Padeye-Brace Clamp Structure Strength during Installation of Riser-Spool at Offshore Platform

Rudi Walujo Prastianto, Yusapril Hagie Syamsun Nahar, Yoyok Setyo Hadiwidodo

Abstract


The need for natural gas in Indonesia has developed very rapidly, thus encouraging the construction of many production support facilities. One of them is the Wellhead Platform B (WHP-B) in West Pangkah waters, East Java. This production platform is in shallow water conditions with a depth of less than 5 m and a distance of less than 5 km from the shoreline. Therefore, when the pipe installation process is carried out, a crane barge or construction vessel type cannot be used. To be able to connect the gas flow from the well to the production platform (WHP-B), it requires a supporting structure in the form of a spool and riser. The size of the spool and riser that will be installed on WHP-B is 16” and 6” with the condition that the riser and spool are connected. A crawler crane carried by a barge can be used for the installation process to occur efficiently. For the 16”-6” riserspool to be lowered simultaneously, it requires a temporary structure that serves to clamp the two pipes so that they can be installed simultaneously. This structure is a modification between the padeye and the brace clamp. The process of lowering the 16”- 6” riser-spool experienced a critical condition when it was in the splash zone. Based on the global analysis results, it is known that the UC that occurs is 0.97 with a vertical bending stress of 172.36 MPa in the 3rd padeye-brace clamp structure. After conducting local analysis on the 3rd brace clamp, it is known that the clamp structure is still in a safe condition with a maximum von Mises stress of 2.42 MPa and a maximum deformation of 0.0096 cm.

Keywords


Riser; Spool; Splash Zone; Von Mises Stress; Deformation

Full Text:

PDF

References


D. Å. Viki, “Limiting Operational Wave Criterion for Spool Installation Lift,” Univ. Stavanger, 2015.

Y. Bai and Q. Bai, Subsea Structural Engineering. 2010.

R. Mahardi, Y. S. Hadiwidodo, and R. W. Prastianto, “Analisis Pengaruh Pergerakan Barge terhadap Pergerakan Struktur Riser Support Jacket pada Proses Lifting Tahap Instalasi,” J. Tek. ITS, vol. 10, no. 2, pp. 58–64, 2021, doi: 10.12962/j23373539.v10i2.66967.

R. Y. Giri Kautsar, R. W. Prastianto, M. J. Rifqy, and R. F. Farhana, “Analysis of a Lower Deck Rigging Configuration and Reusable Padeye Design based on Finite Element Model for Improving Stacking Operation Efficiency,” IOP Conf. Ser. Earth Environ. Sci., vol. 1081, no. 1, p. 012043, 2022, doi: 10.1088/1755-1315/1081/1/012043.

M. F. Hendrawan, R. W. Prastianto, and D. M. Rosyid, “Local Stress Analysis at Critical Tubular Joint of Offshore Wind Turbine Jacket Structure,” Lect. Notes Mech. Eng., pp. 238–246, 2023, doi: 10.1007/978-981-19-0867-5_29.

T. T. Tran and D. Lee, “Development of jacket substructure systems supporting 3MW offshore wind turbine for deep water sites in South Korea,” Int. J. Nav. Archit. Ocean Eng., vol. 14, p. 100451, 2022, doi: 10.1016/j.ijnaoe.2022.100451.

API, “Recommended Practice for Planning , Designing and Constructing Fixed Offshore Platforms — Working Stress Design,” Api Recomm. Pract., vol. 24-WSD, no. December 2000, p. 242, 2007.

E. P. Popov, Mechanics of Materials, vol. 2. 1996.

DNVGL-ST-N001, “Noble Denton Marine Services,” 2016.

A. Sarkar and O. T. Gudmestad, “Splash zone lifting analysis of subsea structures,” Proc. Int. Conf. Offshore Mech. Arct. Eng. - OMAE, vol. 1, no. December 2015, pp. 303–312, 2010, doi: 10.1115/OMAE2010-20489.

D. Cosson, M. Rowe, and W. Koolhof, “Wheatstone subsea installation - Challenges associated with large numbers of Subsea heavy lifts and Spools Offshore Australia,” Offshore Technol. Conf. Asia 2018, OTCA 2018, 2018, doi: 10.4043/28226-ms.

I. Noviyanti and R. W. Prastianto, “Numerical Study on the Stress Distribution Analysis of Two Planar DKDT Tubular Joint Under Variation of Axial Loading Conditions,” Lect. Notes Mech. Eng., pp. 19–26, 2023, doi: 10.1007/978-981-19-0867-5_3.

M. Efthymiou, “Development of SCF formulae and generalized influence functions for use in fatigue analysis,” Proc. Offshore Tubul. Joints Conf., 1988.

I. A. Devold, “Finite element analysis of a friction clamp located on a North Sea jacket,” 2011.

W. Wang and Y. Lu, “Analysis of the Mean Absolute Error (MAE) and the Root Mean Square Error (RMSE) in Assessing Rounding Model,” IOP Conf. Ser. Mater. Sci. Eng., vol. 324, no. 1, 2018,




DOI: http://dx.doi.org/10.12962/j25800914.v7i2.19332

Refbacks

  • There are currently no refbacks.


Link Toto Slot Gacor https://journal.uib.ac.id/pagedata/ https://rs-amino.jatengprov.go.id/wp-content/database/ https://rs-amino.jatengprov.go.id/agent/ https://rs-amino.jatengprov.go.id/sites/

Contact:

Pusat Publikasi Ilmiah LPPM Instutut Teknologi Sepuluh Nopember
Department of Ocean Engineering
Institut Teknologi Sepuluh Nopember (ITS)
Kampus ITS - Sukolilo
Surabaya 60111 - Indonesia
Phone/Fax: +62-31-592 8105
e-mail: ijoce@its.ac.id
           ijoce.oe.its@gmail.com

 


International Journal of Offshore and Coastal Engineering by Department of Ocean Engineering is licensed under a Creative Commons Attribution 4.0 International.

  Lisensi Creative Commons

Based on a work at https://iptek.its.ac.id/index.php/ijoce/index.

bni4d

klikjp

https://klik4dx.id/

klik4d login

mawar4d

rajajp188

raffi88

raffi888

klik4d

mpo1212

slot scatter hitam

22crown

22crown

slot gacor

22crown

22crown

22crown