The landing string system underwater Electrohydraulic operated Senturias of Schlumberger is designed to operate from dynamically positioned vessels in deepwater, high pressure and high temperature. It is a shorter and modular flexibility allowing the completion safe, reliable and efficient, as well as cleaning and testing of wells from vessels operating in water depths up to 15,000 feet.
Senturias is the first system to employ landing string of interchangeable spindles and balanced pressure accumulators, which can combine the subsea control modules and batteries in a single assembly.
The assembly is 50% shorter than other systems, while providing tensile strength, nominal pressure and hydraulic output for operations in shallow and ultra-deepwater.
From: http://www.petroleum.com.ve/revista/articulos.php?id=1762&id_edicion=94
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