Interventionless method of setting a casing to casing annular packer

摘要

An annular packer to create an annulus seal that includes a solid mandrel with a first end, second end, central bore, and exterior. The annular packer includes first and second sealing elements connected to the exterior. The second sealing element is expanded radially by axial movement of at least a portion of the second sealing element. The annular packer includes a first piston movable from a first position to a second position. Pressure applied exterior of the mandrel moves a portion of the first sealing element away from the mandrel to create a first seal causing a pressure differential. The pressure differential moves the first piston to its second position axially moving at least a portion of the second sealing element to create a second seal against the casing. A port may be opened releasing the first seal, but the second seal remains set against the casing.

主权项

1. An annular packer comprising:
a solid mandrel having a first end, a second end, a central bore, and an exterior; a first sealing element connected to the exterior of the mandrel; a second sealing element connected to the exterior of the mandrel, wherein the second sealing element is expanded radially by axial movement of at least a portion of the second sealing element; a first piston movable from a first position to a second position within a first chamber on the exterior of the mandrel, the first piston and first chamber being positioned between the first sealing element and the second sealing element; and a first port that permits fluid flow into the first chamber, wherein the first sealing element is between the first port and the second sealing element; wherein via the first port, a pressure differential exterior of the mandrel moves the first piston from the first position to the second position and wherein the movement of the first piston to the second position axially moves at least the portion of the second sealing element.