Add Energy and Trendsetter Develop RWIS Lite

Add Energy and Trendsetter Engineering have teamed up to develop the Relief Well Injection Spool (RWIS) Lite, designed to reduce the complexity of relief well operations, when coupled with the original RWIS product.

RWIS Lite is an exact structural replica of the original RWIS, which allows for duplicity in shared components. The original RWIS increases the flow capacity of a single relief well. The RWIS is placed between the relief wellhead and the BOP to allow multiple pumping vessels to inject the kill fluid into the relief well. The RWIS Lite augments this by simplifying subsea installation and operation of the relief well system.

The RWIS Lite is a flow spool without controls, allowing operators to install BOP’s above the spool. This enhancement excludes gate valves, accumulators, ROV panels and a BOP, reducing the complexity of the subsea hardware configuration. In addition, the deployment method is a duplicate of the original set up of the RWIS, so it can be run off a vessel of opportunity or a mobile offshore drilling unit (MODU) using either a drill pipe or a wire line.

“When the RWIS Lite is used alongside an RWIS, it requires one less drillship and utilizes the existing BOP emergency disconnect system for maximum efficiency,” said Morten Haug Emilsen, managing director, Add Energy. “The RWIS was a first for the industry and now the RWIS Lite represents an evolution of the technology.”

“The RWIS Lite greatly enhances the ease of installation & operation of an RWIS relief well response. The addition of the RWIS Lite makes relief well operations a standard subsea installation procedure instead of a unique one that requires vessel modifications,” said Brett Morry, global technical director of Trendsetter Engineering.

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