Patent ID: 7950468
Filing Date: 2011-05-31
Classification: E21B

Abstract:
1. A method of retrieving at least a first plug and a second plug of the same type from a wellbore, wherein when the plugs are set in the wellbore each plug has a valve in a closed position blocking flow of fluid through the plug and a sealing mechanism expanded into engagement with a wellbore casing providing a seal between the plug and the casing, comprising: connecting a conveyance to the first plug; releasing the first plug by applying tension to the conveyance; circulating fluid down through the conveyance and the first plug to the second plug; moving the first plug into connection with the second plug without disconnecting the conveyance from the first plug; releasing the second plug by applying tension to the conveyance, the first plug and the second plug; and retrieving the first plug and the second plug from the wellbore simultaneously.