Russel Davies Mobil North Sea Ltd. Aberdeen Tim Maltby Andrew Palmer & Associates Aberdeen Mobil North Sea Ltd., Aberdeen, is developing a remotely controlled, mechanical isolation tool for use in servicing emergency shutdown (ESD) valves, such as those required for all pipelines operating in the U.K. North Sea. The program follows initial use of a freeze plug to isolate the ESD valve on the company's Beryl Alpha platform riser. SERVICING ESDS Following the 1988 Piper Alpha disaster and recommendations of the subsequent Cullen report, all offshore pipelines operating in the U.K. North Sea must be fitted...

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