Borehole abandonment method using retrievable inflatable bridge plug with separate seal and anchor components

摘要

A retrievable inflatable plug system features distinct seal and anchor elements where the seal element features overlapping ribs preferably metallic and preferably overlapping. The ribs extend the substantial length of the packer and are disposed under the annularly shaped sealing element. The anchor features exposed continuous ribs extending from opposed ends with one or more stiffener rings disposed on the exposed ribs. The elements can be inflated separately or together and include valving systems to allow deflation for selective removal of the plug to put a well back into service.

主权项

1. A borehole abandonment method, comprising:
running in a removable plug assembly comprising at least one inflatable anchor component comprising first overlapping ribs and at least one surrounding stiffener ring and at least one spaced inflatable sealing component with said sealing component comprising second overlapping ribs extending along a covering sealing element, said sealing element is longer than said second overlapping ribs and where at least one of opposed ends of said sealing element extend over spaced end sleeves; bonding said sealing element to said ribs and said end sleeves; inflating said components to create a pressure barrier in the borehole; abandoning the borehole due to said inflating.