公开(公告)号：US06571874B1

公开(公告)日：2003-06-03

申请号：US09786488

申请日：2001-05-30

申请人： Armin Lovenich ,  Hans-Joachim Doering

发明人： Armin Lovenich ,  Hans-Joachim Doering

IPC分类号： E21B4700

CPC分类号： E21B43/006

摘要： A method for the in-situ extraction of gas from coal seams is provided. Flow paths are produced in gas-containing coal by opening up the structure of the coal by introducing into a bore hole that is sunk into the coal at least one gas and/or liquid under pressure over a prolonged period of time at a pressure that is less than the lowest principal stress determined in a respective seam layer from which gas is to be extracted. The introduction into the bore hole is carried out with a cyclically fluctuating pressure. Gas is subsequently extracted via the bore hole.

摘要翻译： 提供了一种从煤层原位提取气体的方法。 在含气煤的煤气中产生流动通道，通过将煤的结构引入一个钻孔中，该钻孔在压力下在压力下在压力下沉入至少一种气体和/或液体的孔中，压力为 小于要从其中提取气体的相应接缝层中确定的最低主应力。 钻孔的引入是以周期性波动的压力进行的。 随后通过钻孔提取气体。