(EnergyAsia, May 10) — Singapore’s Keppel Corp said two of its subsidiaries, Keppel FELS Limited and Keppel Verolme BV, have each clinched a contract from Transocean Inc. (Transocean) worth a total of US$140 million.   Each contract is for the upgrading of a Sedco 700-series semisubmersible drilling rig. The two Keppel yards reap substantial synergy…