E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/35
E21B 43/24 (2006.01)
Patent
CA 1161359
ABSTRACT OF THE DISCLOSURE A method for underground gasification of fossil fuel comprises preparing a gas generator by drilling in the seam of fossil fuel borehole passages and vertical bore- holes including main boreholes located at the beginning of the passage and intermediate boreholes arranged along the longitudinal axis of each borehole passage on either side of the axis and alternately, each next borehole be- ing located on the side opposite to that on which the preceding borehole is located; providing a fire face on the borehole passage end side; fire-working the borehole preceding beginning from the fire face; alternately cross- cutting the vertical boreholes with the borehole passage beginning on the fire face side; gasifying fossil fuel within individual portions beginning from the fire face side by alternately blasting through each intermediate borehole directionally in the seam plane at an angle to the longitudinal axis of the borehole passage and in the direction away from the longitudinal axis of the borehole passage for a time required for gasifying maximum 20% of fossil fuel deposit within each portion of the borehole passage and to ensure a thermal preparation of the seam, the blasting being effected by increasing its intensity in each intermediate borehole proportionally with an in- crease in the length of the borehole passage; removing the resultant gas within each portion in the direction toward the fire face; subsequent gasification of fossil fuel by blasting through the main boreholes or both through the main boreholes and boreholes passages, and removing the resultant gas.
376059
Kulakova Maia A.
Saptykov Ivan M.
Volk Alfei F.
Zvyagintsev Kirill N.
Zybalova Gali P.
Marks & Clerk
Vsesojuzny Nauchno-Issledovatelsky Institut Ispolzovaniya V. Nar Nefteproduktov I. Szhizhennykh Grazov "vniipromgaz"
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