OTC.10: Spotlight Award recognizes Expro safety valve system

Surface controlled sub-surface safety valves (SCSSVs) are prone to fail from plugs or leaks in the hydraulic control line.

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Offshore staff

HOUSTON -- Surface controlled sub-surface safety valves (SCSSVs) are prone to fail from plugs or leaks in the hydraulic control line. The common remedial solution is to install a sub-surface controlled safety valve (SSCSV), such as a storm choke.

These SSCSVs are directly influenced by changing well conditions, such as high flow rates, low pressures, or by water slugs, and thus operation can be unpredictable. Additionally, they are not controllable from surface and not fail-safe, which is undesirable from a well control and safety standpoint.

Developed with the support of Petrowell Ltd, FlowCAT is a new wireless controlled safety valve system that can be retrofitted into a well using conventional slickline intervention equipment and procedures. Controllable from surface and of a fail-safe closed design, this offers both functional and safety advantages over existing SSCSVs.

The valve system also offers a retrofit solution with no hydraulic control line. Where a capillary string is needed for foam injection, this frees the hydraulic control line.

FlowCAT is a more controllable and predictable alternative to an ambient valve or storm choke to minimize deferred production, and to increase well safety.

05/04/2010

Pennwell web 120 263

FlowCAT wireless safety valve system.

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