Well Control in Case of Offshore Blowout: Separate Annulus Shut-In Device

摘要

A device which can be placed downhole under the DHSV and can shut the annulus and suspend the tubing, can reduce the probability of secondary blowout by about 50%. Some design problems must be solved. The device will probably be cost effective. Indication of use is for some existing platforms and for smaller platforms. For larger platforms a more effective type of additional shut-in device (BOS) may be preferred. A follow-up project to look further at annulus shut-in devices is recommended.