Reference Captain Ted's question in above description, after some cursory online searching it appears there are several companies (i.e. Haliburton, Damen, etc) that deal with "well stimulation vessels".

Following from wikipedia....
"Well stimulation is a well intervention performed on an oil or gas well to increase production by improving the flow of hydrocarbons from the reservoir into the well bore. It may be done using a well stimulator structure or using off shore ships / drilling vessels, also known as "Well stimulation vessels".

Further online searching revealed...SBSS (SB Submarine Systems) is China's leading provider of subsea cable installation services and one of the key submarine cable installers in Asia.