Device and Method for Disconnecting Jammed Subsea Wet-Mate Connectors

Abstract

The present invention comprises a device and method for non-destructively disconnecting jammed subsea wet-mate connectors. Over time, the inadequate interaction of the housing of these connectors with the cathodic protection of other subsea equipment can promote the accumulation of sediments on the connectors, particularly chalcomagnesian sediments. This layer of sediments is very stable, which sticks the connector and prevents its usual disconnection by means of the mechanical arm of an ROV. The present invention provides a structure comprising hydraulic cylinders that are actuated to move an extractor base, which in turn exerts a force on the subsea connector until the sediment layer is broken and the connector is disconnected. Optionally, the device may actuate a hammer if the hydraulic cylinders fail to break the sediment layer. The hammer causes several impacts that weaken the sediment layer until it is broken, allowing the conventional disconnection of the connector. A method of using the device is also provided. Advantageously, the present invention prevents lifting of the subsea equipment and the destruction of the electrical connector, making disconnection of the jammed connector much faster, more efficient and cheaper.

Dependencies are inferred from the claim text.