Keppel FELS Ltd (Keppel FELS), a unit of Singapore’s Keppel Corporation Limited, has secured a contract from Diamond Offshore Services Company, a subsidiary of Diamond Offshore Drilling, Inc. (Diamond Offshore), to upgrade semisubmersible rig Ocean Endeavor for US$85 million. The deal was secured through another Keppel unit, Keppel Offshore & Marine Ltd (Keppel O&M).  …