Boring or penetrating the earth – Processes – Boring curved or redirected bores
Reexamination Certificate
2005-08-02
2005-08-02
Neuder, William (Department: 3672)
Boring or penetrating the earth
Processes
Boring curved or redirected bores
C175S070000, C166S050000, C166S117500
Reexamination Certificate
active
06923275
ABSTRACT:
A process for underbalanced drilling into multiple coal and shale formations, and dewatering the drilled formations, which includes drilling a first borehole through several coal seams to a certain depth, defined as a cased borehole; lowering an upstock on the end of a carrier string to the depth of the upper coal seam; lowering a drill string in the carrier string, and angling off of the upstock, to drill a lateral or horizontal borehole within the coal seam; repeating the process for the second coal seam; setting a packer in place above the first coal seam in the annulus between the cased borehole and the carrier string; forming perforations in the wall of the carrier string below the packer; retrieving the upstock from the carrier string; lowering an electrical submersible pump to the bottom of the principal borehole, defined as a sump portion of the borehole; collecting methane gas from the two coal seams through the annulus between the second drill string and the carrier string to the surface; pumping water from the sump portion to the surface within the annulus of the second drill string, while gas within the annulus between the carrier string and the outer casing enters the plurality of perforations in the carrier string to be carried up to the surface.
REFERENCES:
patent: 5720356 (1998-02-01), Gardes
patent: 6065550 (2000-05-01), Gardes
patent: 6357523 (2002-03-01), Zupanick
patent: 6425448 (2002-07-01), Zupanick et al.
patent: 6457540 (2002-10-01), Gardes
patent: 2003/0062198 (2003-04-01), Gardes
patent: 2004/0007389 (2004-01-01), Zupanick
patent: 2004/0007390 (2004-01-01), Zupanick
patent: 2004/0035582 (2004-02-01), Zupanick
patent: 2004/0060737 (2004-04-01), deBoer
Garvey, Smith, Nehrbass & Doody, L.L.C.
Neuder William
Smith Gregory C.
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