TDW Offshore Services AS (TDW) has successfully completed a series of pipeline pressure isolation operations offshore western Borneo in Malaysia for Sarawak Shell Berhad. The operations were carried out on the Jintan, B11 and F6 platforms in the South China Sea, as part of Sarawak Shell Berhad’s ongoing pipeline valves maintenance program. The first of the three operations took place on the Jintan platform on a 24in gas export pipeline that extends from the JNDR-A platform to platform M1 off the West coast of Sarawak. TDW executed a double-block pressure isolation against 90bar pipeline pressure so that Shell could safely replace a passing shut down valve. On the second operation, a 32in SmartPlug isolation tool was utilized to replace two passing launcher motor-operated valves (MOVs) on a 32in gas export pipeline at the B11 platform that connects to the E11RB platform. The third operation also involved replacement of launcher MOVs on a 32in gas export pipeline that extends from the F6P-A platform to the E11 hub. This particular operation required TDW to utilize the SmartPlug system to successfully isolate the pipeline against 70bar. The pipeline was isolated for 11 days for the replacement of defective MOVs and an extended duration for additional topside maintenance activities.
