Deep water hurricane valve

A method for temporarily isolating an oil and gas well comprising the steps of:

• running a packer and a storm valve into the well, the storm valve having a lower end in mechanical communication with the packer, an upper end in mechanical communication with a workstring, and a valve mechanism;
• setting the packer;
• moving the valve mechanism from a first position permitting fluid flow through the valve mechanism to a second position preventing fluid flow through the valve mechanism;
• and
• removing the workstring from the upper end of the storm valve.

A method of temporarily isolating an oil and gas well comprising the steps of:

• running a retrievable packer and a storm valve into the well, the storm valve comprising (i) a valve housing having a lower end in mechanical communication with the retrievable service packer, (ii) an isolation sleeve positioned inside of the valve housing and hydraulically shiftable between an opened position and a closed position, and (iii) a standing valve positioned within the isolation sleeve;
• setting the retrievable packer;
• and
• applying a preselected hydraulic pressure to the valve housing to move the isolation sleeve to the closed position to prevent fluid flow through the storm valve.