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Title: Method for removal of methane from coalbeds

Abstract

A method for removing methane gas from underground coalbeds prior to mining the coal which comprises drilling at least one borehole from the surface into the coalbed. The borehole is started at a slant rather than directly vertically, and as it descends, a gradual curve is followed until a horizontal position is reached where the desired portion of the coalbed is intersected. Approaching the coalbed in this manner and fracturing the coalbed in the major natural fraction direction cause release of large amounts of the trapped methane gas.

Inventors:
 [1];  [1]
  1. (Morgantown, WV)
Issue Date:
Research Org.:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
OSTI Identifier:
862456
Patent Number(s):
3934649
Assignee:
United States of America as represented by United States Energy (Washington, DC)
Patent Classifications (CPCs):
E - FIXED CONSTRUCTIONS E21 - EARTH DRILLING E21F - SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; removal; methane; coalbeds; removing; gas; underground; prior; mining; coal; comprises; drilling; borehole; surface; coalbed; started; slant; directly; vertically; descends; gradual; curve; followed; horizontal; position; reached; desired; portion; intersected; approaching; manner; fracturing; major; natural; fraction; direction; release; amounts; trapped; methane gas; underground coal; horizontal position; comprises drilling; ethane gas; desired portion; /166/299/

Citation Formats

Pasini, III, Joseph, and Overbey, Jr., William K. Method for removal of methane from coalbeds. United States: N. p., 1976. Web.
Pasini, III, Joseph, & Overbey, Jr., William K. Method for removal of methane from coalbeds. United States.
Pasini, III, Joseph, and Overbey, Jr., William K. Thu . "Method for removal of methane from coalbeds". United States. https://www.osti.gov/servlets/purl/862456.
@article{osti_862456,
title = {Method for removal of methane from coalbeds},
author = {Pasini, III, Joseph and Overbey, Jr., William K.},
abstractNote = {A method for removing methane gas from underground coalbeds prior to mining the coal which comprises drilling at least one borehole from the surface into the coalbed. The borehole is started at a slant rather than directly vertically, and as it descends, a gradual curve is followed until a horizontal position is reached where the desired portion of the coalbed is intersected. Approaching the coalbed in this manner and fracturing the coalbed in the major natural fraction direction cause release of large amounts of the trapped methane gas.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1976},
month = {1}
}

Patent:

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