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公开(公告)号:US4306621A
公开(公告)日:1981-12-22
申请号:US152716
申请日:1980-05-23
IPC分类号: E21B43/247 , E21B43/30 , E21B47/04
CPC分类号: E21B43/247 , E21B43/30
摘要: An in situ coal gasification process adapted for large scale commercial projects is provided. Techniques are provided to insure establishment of a gasification front over the full seam thickness as each successive injection well in the array is brought on line. This is accomplished by controlling the oxidant introduction in a prescribed manner during the early stages of injection after pneumatic communication between well pairs has been established. Also provided are techniques and standards for avoiding or controlling subsidence and for conducting gasification operations in free water laden seams and in coal seams subject to spontaneous combustion.
摘要翻译: 提供了适应大规模商业项目的原位煤气化过程。 提供技术以确保在整个接缝厚度上建立气化前沿,因为阵列中的每个连续注入井被排成线。 这是通过在建立井对之间的气动连通之后在注射的早期阶段以规定的方式控制氧化剂引入来实现的。 还提供了用于避免或控制沉降和在自由含水的接缝和经受自燃的煤层中进行气化操作的技术和标准。
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公开(公告)号:USD472182S1
公开(公告)日:2003-03-25
申请号:US29156650
申请日:2002-03-06
申请人: David L. Whitman
设计人: David L. Whitman
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