Abstract: An aquaculture pen includes an annular floatation assembly formed from a plurality of float platforms connected end to end. A weight ring is suspended from the floatation assembly by a first plurality of tension members at a central portion of the float platforms. A net support ring is suspended from the floatation assembly by a second plurality of tension members that are attached to the floatation assembly, for example, outboard of the first plurality of tension members. A mesh enclosure for the pen includes a main portion attached to the net support ring, a jump net portion that extends from the net support ring to engage the inboard side of the floatation assembly, and a top portion that closes an upper end of the mesh enclosure.

Abstract: A submersible aquaculture pen includes a mesh enclosure supported by an annular floatation collar in a body of water. A weight ring is suspended from the floatation collar with a first plurality of cables. A variable buoyancy assembly is operable to selectively transition the aquaculture pen between a floating configuration and a submerging configuration. The variable buoyancy assembly includes a plurality of connected bell jars that are closed at a top end and are open at a bottom end. An air supply system is configured to selectively inject a controlled amount of air into each of the connected bell jars.

Abstract: An aquaculture pen includes an annular floatation assembly formed from a plurality of float platforms connected end to end. A weight ring is suspended from the floatation assembly by a first plurality of tension members at a central portion of the float platforms. A net support ring is suspended from the floatation assembly by a second plurality of tension members that are attached to the floatation assembly, for example, outboard of the first plurality of tension members. A mesh enclosure for the pen includes a main portion attached to the net support ring, a jump net portion that extends from the net support ring to engage the inboard side of the floatation assembly, and a top portion that closes an upper end of the mesh enclosure.

Abstract: A fire protective fastening system connects a non-load bearing wall to a truss. A fire protective interface is disposed between a top plate structure and a load bearing member. Fasteners connect between the load bearing member and a non-load bearing member to form a floating connection between the non-load bearing member and the load bearing member. The fire protective medium may take a number of forms including a batt of mineral wool, an intumescent tape and an elongated barrier formed of light gauge metal or spring steel.

Abstract: A technique facilitates actuating a variety of components in a downhole environment. The technique utilizes displacement based activation of an atmospheric actuation chamber. Activation of the atmospheric actuation chamber may be initiated via a variety of mechanisms, including manipulation of a restraining device, translation of a seal, and/or destruction of a seal. The atmospheric actuation chamber is coupled in cooperation with the corresponding downhole component to enable selective activation of the downhole component.

Abstract: A technique facilitates actuating a variety of components in a downhole environment. The technique utilizes displacement based activation of an atmospheric actuation chamber. Activation of the atmospheric actuation chamber may be initiated via a variety of mechanisms, including manipulation of a restraining device, translation of a seal, and/or destruction of a seal. The atmospheric actuation chamber is coupled in cooperation with the corresponding downhole component to enable selective activation of the downhole component.