E - Fixed Constructions – 03 – F
Patent
E - Fixed Constructions
03
F
E03F 3/06 (2006.01) E21B 7/30 (2006.01) F16L 1/028 (2006.01) F16L 55/165 (2006.01)
Patent
CA 2132190
2132190 9320371 PCTABS00027 Underground frangible pipe replacement apparatus (1) and methods for replacing an existing unserviceable pipe (7) by first crushing the existing pipe entirely inwardly, or imploding it, to destroy it. The resulting shards (73) are then forced outwardly into the surrounding soil, creating a bore large enough to accommodate a replacement pipe (23) at least as large as, or larger than, the old pipe. The new pipe (23) is pulled into place substantially simultaneously with the expansion of the bore. The crushing tool (5) includes a generally tubular main body (43) and a plurality of longitudinally extending, tapered blades (53) circumferentially disposed about the ID of the main body of the crushing tool. The crushing tool has a connecting rod (47) at its center, including means for connecting the crushing tool to a motive force at one end and means for connecting the crushing tool to the expanding plug (13) at the other end.
Kirby Eades Gale Baker
Mcconnell W. Harry
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