Patent ID: 7160061
Filing Date: 2007-01-09
Classification: B09B,B09C,B23K,E02D,E21D

Abstract:
1. A subterranean barrier adjacent a selected region of a subterranean formation, comprising: a plurality of casing strings positioned within a subterranean formation, each casing string of the plurality of casing strings comprising a bore extending longitudinally through at least a portion thereof, each of the plurality of casing strings being laterally adjacent to at least one other casing string of the plurality of casing strings; an interlocking structure extending between at least one casing string of the plurality of casing strings and at least another adjacent casing string of the plurality of casing strings; and barrier filler material disposed at least partially within the interlocking structure; wherein the at least one casing string of the plurality of casing strings is affixed to the at least another adjacent casing string of the plurality of casing strings through at least one weld disposed at least partially along an interface exposed to the bore of the at least one casing string or the bore of the at least another adjacent casing string.