Valving system for hurricane plugs

摘要

A tubular body containing a sleeve actuated safety valve is attachable to the top end of a hurricane plug. A running tool has a floating nut connection with the tubular body and a tubular extension on the running tool effects the opening of the safety valve while connected to the tubular body. After setting the hurricane plug, the running tool is disconnected from the tubular body by setdown weight, followed by rotation. A retrieving tool has an external threaded section which is threaded through an internal threaded section in the tubular body to engage the actuating sleeve for the safety valve, and effect the opening of the safety valve. Further rotation of the running tool engages the retrieving tool with the tubular body to effect the unsetting of the hurricane plug and permit the removal of the tubular body, hurricane plug and depending tool string from the well by the retrieving tool.