Page 47: of Offshore Engineer Magazine (Apr/May 2015)

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API 14A, Edition 10. A design guideline dissolved acid gases is highly dependent simply selecting a material for extreme

EPIC for HPHT is currently being developed on temperature and pressure speci? c to and/or harsh environments. Different (API 17TR8) by many experts from the each condition. considerations must be taken for subsea, oil and gas industry. These new design Well ? uid compatibility (sour vs. sweet topside, or onshore oil and gas produc- guidelines will serve as a starting point service) is another key issue, as are tem- tion; the nature of the HPHT reservoir for testing and quali? cation at HPHT in perature de-rating effects on minimum will highly in? uence the materials harsh environments. yield strength. A ? nite understanding of selection. Having the correct materials in

Standard testing is the common material properties is essential. place for the purpose and using the opti- approach in the majority of cases, but Regarding non-metallic materials, the mum monitoring systems are essential to the correct approach will be to model industry is currently developing poly- avoid failures. the environment and mimic the actual mers and seals that can withstand these

Luis F. Gar? as is a conditions expected in the ? eld. This ultra-HPHT well conditions up to 30,000 materials and testing applies to corrosion testing, mechani- psi (2068.5 bar) and 260°C (500°F) while consultant at Wood cal testing (fatigue, fracture, hydrogen, retaining mechanical properties, chemical

Group Kenny in cyclic loading, etc.), and dynamic testing performance, and well ? uid compatibility.

Houston, focusing on in harsh environments. All modeling Reliability prediction, environmental con- projects related to and testing needs to take into account cerns and safety issues must be addressed, materials, asset the actual environment, the stresses, and and further seal research needs to be integrity management simulate the expected lifetime, as well conducted. In some cases, metal-to-metal and testing at HPHT using electrochemis- as ensuring that the acceleration factors seals may replace elastomers.

try and microscopy. He is an active for the quali? cation testing are in good The crux of the challenges relating to member of NACE International and The agreement with the environments and materials in harsh environments is the

Electrochemical Society. Gar? as holds a lifetimes expected for the asset. need for accurate testing and quali? ca-

B.Sc. in chemical engineering from

Measurements for reservoir conditions tion in the context of the actual operating

Universidad Autonoma de Yucatan can often be made in error; not due to the environment, correct material selection (Mexico), a M.Sc. in corrosion science and measurements being performed improp- for each application, and the use of mod- engineering from University of Manchester erly, but that concentrations, pressures eling in the early project stages.

Institute of Science and Technology and temperatures are measured at differ- There are a number of variables which (UMIST - UK) and a Ph.D. in materials ent locations and at lower temperatures. must be considered when designing a science from Oxford University (UK).

This causes problems as the amount of device, planning to build a system or

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