Abstract: A method for controlling buckling in subsea pipelines involves identifying spaced-apart sections of a subsea pipeline suitable for controlled lateral buckling. Sets of inclined sleepers are installed at each spaced-apart section and are selected to support the spaced-apart sections of the subsea pipeline in an orientation that is perpendicular to the initial as-laid position. Any buckling caused by thermal expansion of the subsea pipeline is distributed to two or more of the spaced-apart sections, causing the two or more spaced-apart sections to deflect laterally along the inclined sleepers outwardly from an initial as-laid position.

Abstract: A method for controlling buckling in subsea pipelines involves identifying spaced-apart sections of a subsea pipeline suitable for controlled lateral buckling. Sets of buoyancy modules are installed at each spaced-apart section and are selected to support the spaced-apart sections of the subsea pipeline in a neutrally buoyant condition at the seafloor when the subsea pipeline is in service. Any buckling caused by thermal expansion of the subsea pipeline is distributed to two or more of the spaced-apart sections, causing the two or more spaced-apart sections to deflect laterally along the seafloor outwardly from an initial as-laid position.

Abstract: A method for controlling buckling in subsea pipelines involves identifying spaced-apart sections of a subsea pipeline suitable for controlled lateral buckling. Sets of inclined sleepers are installed at each spaced-apart section and are selected to support the spaced-apart sections of the subsea pipeline in an orientation that is perpendicular to the initial as-laid position. Any buckling caused by thermal expansion of the subsea pipeline is distributed to two or more of the spaced-apart sections, causing the two or more spaced-apart sections to deflect laterally along the inclined sleepers outwardly from an initial as-laid position.

Abstract: A subsea hot-tapping system, comprising an existing pipeline; a hot-tap body fitted around the pipeline; and a fluid injected between the pipeline and the body. In some embodiments, the system also includes a radial arm cutter, adapted to cut a hole in the existing pipeline.

Abstract: A method of making a connection in a subsea pipeline, comprising lowering a foundation over a section of the pipeline; cutting the out a section of the pipeline to form an end of a first pipeline and an end of a second pipeline; connecting a first hub to the end of the first pipeline; connecting a second hub to the end of the second pipeline; connecting a first port to the first hub; connecting a second port to the second hub; and connecting a jumper between the first port and the second port.

Abstract: A subsea hot-tapping system, comprising an existing pipeline; a hot-tap body fitted around the pipeline; and a fluid injected between the pipeline and the body. In some embodiments, the system also includes a radial arm cutter, adapted to cut a hole in the existing pipeline.

Abstract: There is disclosed a system comprising a structure in a body of water, wherein the body of water comprises a depth comprising a top-section from a surface of the body of water to one-third of the depth, and a second-section from one-third of the depth to two-thirds of the depth, a first buoyant apparatus attached to the structure in the top-section of the depth, a second buoyant apparatus attached to the structure in the second-section of the depth, wherein the second buoyant apparatus provides a second buoyancy effect average per length of the structure at least 30% less than a first buoyancy effect average per length of the structure provided by the first buoyant apparatus.