SACRIFICIAL LINER LINKAGES FOR AUTO-SHORTENING AN INJECTION PIPE FOR UNDERGROUND COAL GASIFICATION

摘要

A sacrificial liner linkage that can be used to automatically shorten a liner for an underground coal gasification process is provided. The sacrificial liner linkage may be one or more sacrificial liner linkage portions that are spaced between one or more liner portions in which the sacrificial liner linkage portions disintegrate before the one or more liner portions to automatically shorten the liner.

主权项

1. An injection well liner for an underground coal gasification process, the injection well liner comprising:
a proximal end and a distal end of the injection well liner through which an oxidizing gas is injected for an underground coal gasification process, the oxidizing gas being injected at the proximal end and output at a distal end of the injection well liner, the injection well liner having one or more liner portions and one or more sacrificial liner portions in between the one or more liner portions; and wherein each of the one or more sacrificial liner portions individually disintegrate due to a temperature during the underground coal gasification process so that each sacrificial liner portion and the liner portion connected to a distal end of each sacrificial liner portion falls off and the injection well liner is shortened during the underground coal gasification process.