The Relief Well Injection Spool (RWIS)
Add Energy and Trendsetter Engineering have combined expertise to provide market leading engineering and hardware support services to the industry’s most challenging problems in a nimble and responsive environment.
The Relief Well Injection Spool (RWIS) is a piece of specialist subsea equipment that enables operators to stop a blowout from a prolific reservoir safely and efficiently via a single relief well. This is achieved by increasing the pump rate of kill mud into the blowing well by removing the bottle-neck caused by restrictive choke and kill lines from the surface vessel to the seabed.
The RWIS has been designed and built to greatly increase the pumping capacity of a single relief well by enabling the ability to pump in excess of 200 barrels of kill mud per minute through a single relief well, four times as much kill fluid as typically achievable. A significant advance for the industry which utilizes multiple vessels as opposed to the conventional method of multiple relief wells.
The RWIS is installed on the relief well wellhead beneath the blowout preventer (BOP) to provide additional flow connections into the wellbore. Using high‐pressure flex lines, the inlets enable pumping units from separate floating vessels, in addition to the relief well rig, to deliver a high‐rate dynamic kill.
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