Knowing Subsurface Safety Valve- API14A
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The need for compact equipment and close engineering tolerances also<br />
presents design and engineering challenges for valves placed in extreme<br />
environments.<br />
Advanced coating materials and application techniques, such as the<br />
ScaleGard coating, have been developed to enhance resistance to surface<br />
deposits on flow wetted and selected valve components. Recent<br />
improvements in chemical-injection technology allow use of ScaleGard<br />
coating within the safety valve to prevent accumulations of production borne<br />
contaminants and help to ensure safety valve system reliability. Larger<br />
safety-valve sizes will soon be needed. In some areas, for example Norway,<br />
plans for mono-bore completions with large-diameter production tubulars<br />
highlight the need for 9 5⁄8-in. safety-valve systems. The forces resulting<br />
from pressure acting on such large component areas are far beyond those of<br />
conventionally sized equipment and present significant additional challenges<br />
to design engineers.<br />
Charlie Chong/ Fion Zhang
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