Abstract: The heavy duty a vent cap system includes a top plate with a bucket interface, a center stem assembly, a retainer assembly, a bottom plate with a stem sleeve and guiding device, an adapter ring, a plurality of perimeter stem assemblies and a plurality of perimeter installation stems. A remote operated vehicle engages the bucket interface to rotate a center stem member in the center stem assembly. A threaded portion of the center stem assembly engages a stem nut in the retainer assembly. The rotation along threads of the stem nut held within the retainer assembly actuates the bottom plate between opened and closed positions. The bottom plate maintains alignment to the top plate and adapter ring and resists cocking and distortion. The bottom plate seals to a connection portion of the adapter ring in any orientation of the heavy duty vent cap system, ranging from vertical to horizontal.

Abstract: The system for sealing subsea equipment includes a port tube, having a test port hole and a curved slot, a test port plug mounted in the test port hole, an insert body having an insertion tip portion, a middle sealing portion, and a base portion, an insert stem engaged to the base portion, a top cap engaged to the insert body, and a sealing device mounted around the insert body and in sealing engagement with the port tube. A locked configuration corresponds to a locking arm of the top cap at a terminal end of the curved slot. A set configuration corresponds to compression of the sealing device by actuation of the insert body by the plug stem. The sealing device aligns with the test port plug in the set configuration so as to allow verification of sealing engagement of each seal ring and the port tube.

Abstract: The heavy duty a vent cap system includes a top plate with a bucket interface, a center stem assembly, a retainer assembly, a bottom plate with a stem sleeve and guiding device, an adapter ring, a plurality of perimeter stem assemblies and a plurality of perimeter installation stems. A remote operated vehicle engages the bucket interface to rotate a center stem member in the center stem assembly. A threaded portion of the center stem assembly engages a stem nut in the retainer assembly. The rotation along threads of the stem nut held within the retainer assembly actuates the bottom plate between opened and closed positions. The bottom plate maintains alignment to the top plate and adapter ring and resists cocking and distortion. The bottom plate seals to a connection portion of the adapter ring in any orientation of the heavy duty vent cap system, ranging from vertical to horizontal.