Deepwater Production TTR Design
EVENT: OMAE
1 Jun 2014
As the majority of “easy access” reservoirs have been discovered, deep water exploration and production is at the forefront of the Oil & Gas industry. Operators have utilized Top Tensioned Riser (TTR) systems in deepwater on Spar and TLP platforms and are now well established in the US Gulf of Mexico (GoM), West Africa and Asia.
However, new reservoirs, particularly in the US Gulf, will be discovered in ultra-deep water (~10,000 ft) with high pressure (HP) (>15 ksi) and high temperature (HT) (>284 ºF). In such conditions, the criticality and complexity of a production TTR system is significantly increased. This paper addresses key design issues and considerations including wall thickness sizing, material selection, manufacturing capabilities, interface management and qualification testing.
Authors
Ricky Thethi
Global Director, UK
About
Ricky is a Global Director based in 2H's London office having relocated from Houston in 2019 after spending almost 20 years in 2H’s Houston office as part of the management team.
Ricky is responsible for globalising the company’s integrity engineering capability and business across all of its offices in both the oil and gas and offshore wind sectors. One of his current focuses is digital transformation, including the use of machine learning and automation technology to improve the speed and accuracy of structural analysis, integrity monitoring and life extension.
Ricky obtained his degree in civil engineering with first-class honours from the University of Surrey in the UK, and is a fellow and Chartered Marine Engineer of the Institute of Marine Engineering, Science and Technology.
Insights
Daniel Reagan
Principal Engineer
About
Daniel has over 17 years experience in deep water equipment design, manufacturing, testing, supply, offshore installation and inspection. As part of his early career roles and responsibilities he conducted global riser analysis, using finite element analysis (FEA) programs such as flexcom, to evaluate the strength and fatigue performance of riser system for major oil and gas operators. In addition to FEA work, spent several years designing, supplying and installing monitoring system for top tensioned riser (TTR’s), steel catenary risers (SCR’s), subsea jumpers and manifolds as well as tensioner systems.
The past 12 years have been spent overseen internal and external equipment design, manufacturing, quality, testing and delivery. Daniel has worked with and travelled to vendors throughout the world evaluating forging, machining and assembly facilities. As well as subsea equipment delivery management he have also been involved in a number of specialty subsea inspection campaign which included the development, testing and offshore inspection of critical subsea infrastructure. He has been the offshore installation lead and been involved with multiple subsea systems working with operators and drilling contractors to install equipment in accordance with procedures and safe working practices.