Abstract: A sock for a floating platform including a plurality of tubulars coupled together and defining a bore and a catcher assembly. The catcher assembly including a plurality of orifices formed in at least one of the plurality of tubulars, a catcher releasably coupled to the plurality of tubulars by a plurality of shearable members, wherein the catcher is disposed in the bore, and wherein the catcher is movable from a first position to a second position, and a stop flange having at least one aperture.

Abstract: A sock for a floating platform including a plurality of tubulars coupled together and defining a bore and a catcher assembly. The catcher assembly including a plurality of orifices formed in at least one of the plurality of tubulars, a catcher releasably coupled to the plurality of tubulars by a plurality of shearable members, wherein the catcher is disposed in the bore, and wherein the catcher is movable from a first position to a second position, and a stop flange having at least one aperture.

Abstract: The present disclosure generally relates to jack-up units employing a multi-purpose derrick structure for drilling, plug, abandonment, and decommissioning operations. The multi-purpose derrick structure includes a mast that may be vertically oriented in a first configuration to facilitate drilling, plug, and abandonment procedures, or may be pivotably positioned in a second configuration for decommissioning operations or other procedures. In the pivoting position, the mast functions as a heavy lift crane. One or more selective pivoting structures at the base of the multi-purpose derrick structure, and one or more actuators, facilitate the multiple uses of the multi-purpose derrick structure.

Abstract: A method for preparing to move a floating structure away from a wellbore drilled below the bottom of a body of water includes filling a riser extending from the bottom of the body of water to the floating structure with water. The water in the riser is displaced to a selected first depth below the water surface. The riser is sealed at a second selected depth shallower than the first selected depth. The portion of the riser above the second selected depth is withdrawn onto the floating structure.

Abstract: A method for forming an aluminum alloy riser includes forming a riser tube from an aluminum alloy. At least one flanged coupling is formed from the aluminum alloy. The flanged coupling is friction stir welded to one end of the tube. In one embodiment, an end of the tube is radially plastically expanded prior to welding the flange to the one end of the tube.