Powered subsea tool assembly, to reinstate the intended functionality of a subsea tree valve actuator
AssigneeNeptune Subsea Engineering Limited
InventorsLev Uryevich Roberts-Haritonov, Paul Collins
Life of this patent
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Abstract
A subsea powered override tool is described, for effective and permanent reinstatement of subsea tree valve actuation functionality. The override tool is powered from the Subsea Control Module on the subsea Christmas Tree. The override tool assembly comprise cylinder body (11), piston (8) and cylinder cap (2). A locking collar (1) that is part of the override tool is used to attach the tool to the actuator body on the subsea Tree. The override tool is designed for permanent installation and can lie dormant for extensive periods of time before use.
Claims14
A subsea tool for permanently reinstating the functionality of a subsea tree valve actuator, by applying a thrust force to a subsea tree valve actuator stem, comprising a cylinder body which defines a fluid and pressure containing chamber, and a thrust rod for engaging with the tree valve actuator stem of the subsea tree valve actuator wherein:
- the tool gets its hydraulic supply to provide load on the actuator stem directly from a subsea tree SCM (subsea control module) hydraulic supply via an existing SCM hydraulic supply line to the subsea tree valve actuator stem, the subsea tool including a SCM supply line connector;
- wherein the hydraulic supply for the tool is shared with the existing SCM hydraulic supply line for the subsea tree valve actuator;
- and
- wherein the subsea tree valve actuator is a hydraulic actuator.
Dependencies are inferred from the claim text.