Deepwater Production TTR Design

Blaquiere, Andrew; Reagan, Daniel J.; Thethi, Ricky

doi:10.1115/omae2014-24240

Cited by 2 publications

(2 citation statements)

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“…In addition, as the oil and gas industries move to explore and develop ultradeepwater reservoirs, the weight and performance of critical systems are increasingly important [17]. Generally, high-tensile-strength steel tubes are used for the tendons and become increasingly heavy at ultra-deepwater depths due to the requirement to resist collapse of the tube.…”

Section: Introductionmentioning

confidence: 99%

Tensile properties of novel carbon/glass hybrid thermoplastic composite rods

Naito

Oguma

2017

Composite Structures

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Novel carbon/glass hybrid thermoplastic composite rods consisting of unidirectional PAN-based carbon fiber (T700SC), braids of E-class glass fibers, and thermoplastic epoxy matrix have been developed. Three types of hybrid rods with differing carbon/glass ratios (24K1P, 24K2P, and 24K3P) were fabricated. The crosssectional morphologies of the hybrid rods were observed using a digital microscope. Volume fractions of carbon fiber, glass fiber, matrix, and void of the hybrid rods were estimated using a specific gravity measurement via ethanol immersion and a thermogravimetric analysis. The tensile properties and fracture behavior of the hybrid rods were investigated. For all hybrid rods, the stress applied to the specimen was nearly linearly proportional to the strain until failure, with a tensile modulus of 65 (24K1P), 87 (24K2P), and 91 GPa (24K3P) and tensile strengths of 1.42 (24K1P), 1.80 (24K2P), and 1.84 GPa (24K3P). The tensile modulus and strength increased with increasing carbon fiber volume fraction. The Weibull statistical distribution of tensile strength for the hybrid rods was examined. The Weibull modulus of the tensile strengths for the hybrid rods were 23.77 (24K1P), 27.29 (24K2P), and 32.50 (24K3P). The Weibull modulus increased with increasing tensile strength and decreasing void volume fraction of the hybrid rods.

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Section: Introductionmentioning

confidence: 99%

Tensile properties of novel carbon/glass hybrid thermoplastic composite rods

Naito

Oguma

2017

Composite Structures

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“…Due to the hull form of a Spar splash zone joints are not required, however a keel joint is. Details for riser joints design and material selection are discussed in detail in paper [13].…”

Section: High Strength Steel Riser Jointsmentioning

confidence: 99%

SS: HPHT Technology Verification, Validation, and Regulatory Requirements: HPHT Riser Technology Challenges

Dincal

Reagen

Saglar

2018

Day 2 Tue, May 01, 2018

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Operators are looking to drill and develop deep-water wells with pressures over 15,000 psi and temperatures exceeding 300°F. Designing for high pressure, high temperature (HPHT) conditions present a number of engineering challenges, which can push conventional subsea technology designs to their limits. Therefore, there is a need to understand the feasibility of riser systems in these conditions and consequently to close any potential gaps between the current qualified technology and the outlined project specifications for a number of key riser components. For conventional reservoirs, the merits of using wet tree and dry tree systems are well understood after years of design, fabrication, installation and operating experience. For HPHT riser applications, various design challenges exist with respect to the technology readiness of various riser system components of a wet or dry tree system development. Key riser design issues and technology challenges, applicable to wet and dry tree HPHT systems, are addressed in this paper. For a wet tree development, HPHT conditions require the use of thick wall pipes driven by burst sizing requirements, which in turn will lead to challenges associated with fabrication of pipes, pipe welding and inspection as well as meeting applicable sour service requirements. Furthermore, design of riser hang-off systems of wet tree applications is a critical area that requires consideration. The use of High-Integrity Pressure Protection Systems (HIPPS) to overcome HPHT obstacles is also discussed in this paper. The use of high strength steel pipe with threaded mechanical connections provides a weight benefit for a dry tree system. However, the qualification of connectors is required and is expected to be a critical activity. In addition, the dry tree system has many other sealing surfaces and connections subject to HPHT loads at the surface and subsea wellhead locations, each of which presents their own design and qualification challenges.

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Deepwater Production TTR Design

Cited by 2 publications

References 1 publication

Tensile properties of novel carbon/glass hybrid thermoplastic composite rods

Tensile properties of novel carbon/glass hybrid thermoplastic composite rods

SS: HPHT Technology Verification, Validation, and Regulatory Requirements: HPHT Riser Technology Challenges

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