Subsea Safety System provides electrohydraulic control of subsea safety tree

Halliburton has released the Dash 3-in. Subsea Safety System for electrohydraulic control of the company’s subsea safety tree. Previously, control was provided through direct hydraulic pressure from the surface. This latest edition to the Dash series employs the speed of electrohydraulic actuation in core safety functions while still providing full direct hydraulic redundant control of all functions. This helps to increase reliability and provide more cost-efficient operation and maintenance.

Linking with downhole and surface read-out control systems, the Dash system enables analysis to help drive optimal performance and avoid nonproductive time during deepwater dynamic testing.

“The system delivers industry-leading response speed to critical well isolation, pressure containment and emergency disconnect functions,” said Abdalla Awara, VP of Halliburton’s Testing and Subsea Business Line. “It also offers a simplistic design that is easy to operate.”

Recently, the Dash Subsea Safety System was deployed on a deepwater well in Latin America from a vessel in 7,506 ft of water with more than 400 hrs of in-hole operational time. During this deepwater well test, Dash demonstrated a 6-sec downhole safety shut-in followed by an 8-sec surface shut-in and disconnect. This result provides operators with increased confidence that the well can be isolated and unlatched in the shortest amount of time.

Dash fully integrates with Halliburton’s RezConnect Well Testing System. These technologies enable immediate and accurate decision making during well-testing operations, helping operators more efficiently achieve their intended well test objectives while minimizing risk and reducing rig time.