Through tubing bridge plug and installation method for same

摘要

A through tubing bridge plug (200) for providing a gripping and sealing engagement with a casing string of a wellbore. The bridge plug (200) includes an actuation rod (208), an anchor assembly (212), a pair of compression assemblies, each including a support assembly (216, 242) and an anti extrusion assembly (220, 238) and a packing assembly (224) disposed about the actuation rod (208) between the compression assemblies. Responsive to longitudinal movement of the actuation rod (208), the anchor assembly (212) establishes the gripping engagement with the casing string, the compression assemblies are radially deployed such that the anti extrusion assemblies (220, 238) are supported by the support assemblies (216, 242) and the packing assembly (224) establishes the sealing engagement with the casing string.

主权项

1. A system for providing a gripping and sealing engagement with a casing string of a wellbore having an uphole direction, the system comprising:
a downhole power unit having a power unit housing and a rotatable shaft; and a through tubing bridge plug including a housing and a single actuation rod having an exterior surface and a failure section positioned between first and second longitudinal sections of the single actuation rod, the power unit housing operably associated with the bridge plug housing, the rotatable shaft operably associated with the actuation rod; the bridge plug further including: an anchor assembly slidably disposed about the exterior surface of the actuation rod; a pair of compression assemblies slidably disposed about the exterior surface of the actuation rod, each compression assembly including a support assembly and an anti extrusion assembly; and a packing assembly slidably disposed about the exterior surface of the actuation rod between the compression assemblies; wherein, the actuation rod extends through the anchor assembly, the pair of compression assemblies and the packing assembly and does not include a flow passageway; wherein, rotation of the rotatable shaft causes longitudinal movement of the actuation rod in the uphole direction relative to the anchor assembly, the pair of compression assemblies and the packing assembly causing actuation of the anchor assembly to establish the gripping engagement with the casing string, radially deployment of the compression assemblies such that the anti extrusion assemblies compress the packing assembly and actuation of the packing assembly to establish the sealing engagement with the casing string; and wherein, after establishing the gripping and sealing engagement with the casing string, continued longitudinal movement of the first longitudinal section of the single actuation rod in the uphole direction causes the first longitudinal section of the single actuation rod to separate from the second longitudinal section of the single actuation rod.