Model-Centric Digital Subsea Pipeline Design Process and Framework

2018 ◽  
Author(s):  
A. Laye ◽  
K. Victoire ◽  
V. Cocault-Duverger
Keyword(s):  
Design Process ◽  
Subsea Pipeline ◽  
Pipeline Design

Case Studies Highlighting Rapid Repair Methods of Pressurised Pipelines Damaged by Anchors

2018 ◽  
Author(s):  
Dale Millward
Keyword(s):  
Case Studies ◽  
Health And Safety ◽  
Cost Effective ◽  
Pipeline System ◽  
Subsea Pipeline ◽  
Damage Scenarios ◽  
Fail Safe ◽  
Subsea Pipelines ◽  
Marine Vessels ◽  
Pipeline Design

Effective pipeline design and regular maintenance can assist in prolonging the lifespan of subsea pipelines, however the presence of marine vessels can significantly increase the risk of pipeline damage from anchor hazards. As noted in the Health and Safety Executive – Guideline for Pipeline Operators on Pipeline Anchor Hazards 2009. “Anchor hazards can pose a significant threat to pipeline integrity. The consequences of damage to a pipeline could include loss of life, injury, fire, explosion, loss of buoyancy around a vessel and major pollution”. This paper will describe state of the art pipeline isolation tooling that enables safe modification of pressurised subsea pipelines. Double Block and Bleed (DBB) isolation tools have been utilised to greatly reduce downtime, increase safety and maximise unplanned maintenance, providing cost-effective solutions to the end user. High integrity isolation methods, in compliance with international subsea system intervention and isolation guidelines (IMCA D 044 / IMCA D 006), that enable piggable and unpiggable pipeline systems to be isolated before any breaking of containment, will also be explained. This paper will discuss subsea pipeline damage scenarios and repair options available to ensure a safe isolation of the pipeline and contents in the event of an incident DNV GL type approved isolation technology enables the installation of a fail-safe, DBB isolation in the event of a midline defect. The paper will conclude with case studies highlighting challenging subsea pipeline repair scenarios successfully executed, without depressurising the entire pipeline system, and in some cases without shutting down or interrupting production.

scholarly journals Flow Assurance in Subsea Pipeline Design for Transportation of Petroleum Products

2017 ◽  
Vol 07 (02) ◽  
pp. 311-323
Author(s):  
Son Tung Pham ◽  
Minh Huy Truong ◽  
Ba Tuan Pham
Keyword(s):  
Petroleum Products ◽  
Flow Assurance ◽  
Subsea Pipeline ◽  
Pipeline Design

scholarly journals Flow Assurance in Subsea Pipeline Design - A Case Study of Ghana’s Jubilee and TEN Fields

2019 ◽  
Vol 19 (1) ◽  
pp. 72-85
Author(s):  
S. A. Marfo ◽  
P. Opoku Appau ◽  
J. Acquah ◽  
E. M. Amarfio
Keyword(s):  
Flow Rate ◽  
Hydrate Formation ◽  
Flow Assurance ◽  
Processing Plant ◽  
Subsea Pipeline ◽  
Gas Processing ◽  
Parallel Pipeline ◽  
Exploration And Production ◽  
Insulation Thickness ◽  
Pipeline Design

The increasing exploration and production activities in the offshore Cape Three Point Blocks of Ghana have led to the discovery and development of gas condensate fields in addition to the oil fields which produce significant amount of condensate gas. These discoveries require pipelines to transport the fluids avoiding hydrates and wax formation. This paper focuses on subsea pipeline design using Pipesim software that addresses flow assurance problems associated with transporting condensate gas from the Jubilee and TEN Fields to the Atuabo Gas Processing Plant. It also considered an alternate design that eliminates the need for capacity increase of flowlines for the futuristic highest projected flow rates in 2030. The design comprises of two risers and two flowlines. Hydrate formation temperature was determined to be 72.5 ˚F at a pressure of 3 000 psig. The insulation thickness for flowlines 1 and 2 were determined to be 1.5 in. and 2 in. respectively. The pipe size for flowlines 1 and 2 were determined to be 12 in. and 14 in. respectively. The maximum designed flow rate was determined to be 150 MMSCFD. To meet the highest projected flow rate of 700 MMSCFD in the year 2030 at the processing plant, a 16 in. ID pipeline of 44 km length was placed parallel to the 12 in. ID flowline 1. This parallel pipeline increased the designed flow rate by approximately 4.7 times (705 MMSCFD). The alternate design employs 18 in. and 20 in. ID pipes for flowlines 1 and 2 respectively. Keywords: Condensate Gas; Flowline; Flow Assurance; Hydrate; Pipesim

Subsea Pipeline Design Automation Using Digital Field Twin

2019 ◽  
Author(s):  
Subrata Bhowmik ◽  
Gautier Noiray ◽  
Harit Naik
Keyword(s):  
Design Automation ◽  
Subsea Pipeline ◽  
Pipeline Design

Corrosion risk-based subsea pipeline design

2018 ◽  
Vol 159 ◽  
pp. 1-14 ◽  
Author(s):  
Sikder Hasan ◽  
Lily Sweet ◽  
Jason Hults ◽  
Genebelin Valbuena ◽  
Binder Singh
Keyword(s):  
Subsea Pipeline ◽  
Corrosion Risk ◽  
Pipeline Design

Design of Reelable Bulkheads: Application of Pressure Vessel and Subsea Pipeline Codes

2015 ◽  
Author(s):  
Soheil Manouchehri ◽  
David Kaye
Keyword(s):  
Pressure Vessel ◽  
Failure Modes ◽  
Careful Consideration ◽  
Limit States ◽  
Subsea Pipeline ◽  
Load Factors ◽  
High Pressure High Temperature ◽  
Section Viii ◽  
Extent Of Damage ◽  
Pipeline Design

Midline bulkheads are often used as a restraining mechanism in High Pressure / High Temperature (HP / HT) pipe-in-pipe (PIP) systems. Their primary function is to share the loads between the inner and outer pipes and / or to minimize the extent of damage in an operational or installation incident. They can also be used during reeled pipelay to facilitate the reel-to-reel or trip-to-trip weld tie-in. Design of a reeled bulkhead, which is categorized as a “pipeline component” under DNV-OS-F101, requires the careful adaptation of a Pressure Vessel Code (PVC), a subsea pipeline code and compliance with the additional requirements of reeling, welding and fabrication. Modern pipeline codes, such as DNV-OS-F101, are LRFD based codes in which different limit states (failure modes) have been formulated and calibrated based on a given probability of failure. The PVCs, however, do not specifically address the pipeline design and careful consideration in selecting load factors, load combinations and the analysis method are necessary. This paper summarizes a procedure that has been adopted in design of reeled midline bulkheads. The methodology can also be used in design of reeled end bulkheads. Firstly, the initial geometric dimensions of the reelable bulkhead are defined and its reelability is confirmed. Then, appropriate load combinations are identified from ASME BPVC Section VIII – Division 2. Finally, a series of Finite Element Analyses (FEA) are performed to show the fitness-for-service of the bulkhead. The importance of selecting an appropriate and justifiable “code break” is highlighted here.

Unique Approach for Subsea Pipeline Design Challenges in Abu Dhabi Shallow Waters

2016 ◽  
Author(s):  
Rajendran Selvam ◽  
Hussain A. Binthabet ◽  
Salah Jebara al Bufalah ◽  
Najem A. Qambar ◽  
Amr M. Azouz
Keyword(s):  
Abu Dhabi ◽  
Shallow Waters ◽  
Subsea Pipeline ◽  
Unique Approach ◽  
Pipeline Design ◽  
Design Challenges
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