Kitchen Lights Unit No. 3
March , 2016
In May 2015 Global commenced working on the Kitchen Lights Unit No. 3 project under Crowley Solutions for Furie Operating Alaska to install a monopod platform and pipeline in Cook Inlet, Alaska.
The Cook Inlet is one of the most challenging diving environments in the world with zero visibility, up to 30 feet differential between low and high tides, and current speeds reaching up to six knots yielding an average bottom time of 30 minutes per tide swing.
The project, installing a monopod natural gas platform and 16 miles of 10″ concrete coated pipeline, involved at its peak a total of 25 dive crew members located on three different dive vessels in three different operational areas; where the gas line entered Cook Inlet on the south end, the monopod location on the north end, and the 16 miles of pipeline in between. The project started concurrently at all three locations.
At the monopod location, two dive teams worked the four slack tides each day. Tasks included the installation of a template over the well conductor in order to drive a “king” pile to aid in the proper alignment and setting of the Monopod platform, setting of the monopod platform, connecting a 200 foot spool piece to a flange exiting the monopod and finalizing the connection from the pipeline to the monopod. The pipe lay operations utilized the DSV Sand Island to perform ‘span mitigation’ on any length of unsupported pipeline over 30 feet long. Over 300 pallets of Sea Crete bags were used to complete the span mitigation, all installed while liveboating with the DSV Sand Island. Once the pipeline was secured pipeline pigging operations commenced to clean and flush the pipeline of any impurities, in preparation of the installation of the closing tie-in spool and pipeline hydro test. The closing spool piece was installed successfully using both the pipe lay barge and the Sand Island, at which time the hydro test was conducted.