PG&E selected Global Diving & Salvage, Inc. as the prime contractor for the decommissioning and removal of three natural gas pipelines crossing the San Joaquin River. Global first removed the three 12-inch steel submarine pipelines, working from a derrick barge and completing the work within the permitted 3-month window. Divers used a guillotine saw to …
Project Tag: decommissioning
We provided surface diving support aboard the D/B Superior Performance to assist,as needed,with the removal of the topside package and platform jacket. Dive work was performed down to 105 fsw using standard surface diving procedures.
The platform was initially cut free from the jacket then the legs were cut 15 feet below mud line using explosives. After all the legs had been severed,the platform toppled onto its side so that the D/B Superior Performance could pick up the structure,approximately 710 metric tons,and set it on the materials barge for transport to shore and proper disposal.
Global provided saturation diving services aboard the DSV Ocean Carrier to assist with the completion of removal of Platform B,a hurricane damaged,8 leg fixed platform in block EI 292. The upper package had been previously removed as well as the wells plugged and abandoned. Currently,portions of the lower jacket including the lower half of four legs and the majority of the interconnecting members at one end of the jacket remain. The highest point is of the debris is at 170 fsw with two of the legs bent over and protruding into the ocean floor,elevation 220 fsw. Portions of the structure that interfered with the P&A operation were placed in piles on bottom. GDS has been contracted to remove all the remaining structure as well as remaining debris on bottom.