초록 ▼

A method for performing a wellbore-related activity may include positioning a sealing device along the wellbore; conveying a work string into the wellbore; using the work string to perform the activity; extracting the work string out of the wellbore; and shifting the sealing device to a closed posit

A method for performing a wellbore-related activity may include positioning a sealing device along the wellbore; conveying a work string into the wellbore; using the work string to perform the activity; extracting the work string out of the wellbore; and shifting the sealing device to a closed position to seal a bore of the wellbore using a portion of the work string. A device that selectively seals or occludes a wellbore tubular may include a sealing device having a first and a second sealing element that seal a bore of the wellbore tubular. The first and second sealing elements may support a pressure applied in different directions. Pulling an engagement sleeve with the work string in an uphole direction may fold the first and second sealing elements into the closed position. The bore may be unsealed by applying a pressure cycle to shift the sealing device.

대표청구항 ▼

The invention claimed is: 1. A method of performing one or more activities in a wellbore, comprising:using a work string to perform the one or more activities in the wellbore;sealing a tool bore of a tool in the wellbore by shifting at least one sealing device to a closed position by engaging a port

The invention claimed is: 1. A method of performing one or more activities in a wellbore, comprising:using a work string to perform the one or more activities in the wellbore;sealing a tool bore of a tool in the wellbore by shifting at least one sealing device to a closed position by engaging a portion of the work string in the tool bore with the at least one sealing device, wherein the sealing device includes a first and a second sealing element coupled to one another and wherein the tool bore is sealed with the first sealing element and the second sealing element;supporting a pressure applied in an uphole direction with the first sealing element;supporting a pressure applied in a downhole direction with the second sealing element; andfolding the first and second sealing elements by pulling an engagement sleeve associated with the sealing device with the work string in an uphole direction.