Coal bed methane borehole pipe liner perforation system

Details Coal bed methane borehole pipe liner perforation system Coal bed methane borehole pipe liner perforation system

2005-05-17

2005-05-17

Walker, Zakiya (Department: 3672)

Wells

Processes

Perforating, weakening, bending or separating pipe at an...

C166S055200, C166S250030, C166S254200, C166S369000, C175S050000, C175S061000, C175S266000

Reexamination Certificate

active

06892815

ABSTRACT:
A coalbed methane borehole pipe liner perforation system comprises a plastic pipe punch that slips down inside a coalbed methane production borehole lined with a non-perforated plastic pipe. A ground-penetrating radar is used inside the plastic-pipe lined borehole to determine which sections of the pipe are in contact with groundwater. The punch is then operated along the length of the plastic-pipe lined borehole to perforate it for methane-gas collection wherever such groundwater is not present. A radar survey to determine groundwater contact can be made simultaneously in combination with the punching of liner pipe perforations, or earlier in a separate operation.

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