Drilling and Completion Methods for Multilateral Horizontal Wells in Single-hole CBM
A coalbed methane and multi-branch technology, which is applied in wellbore/well components, drilling equipment and methods, drilling equipment, etc. The effect of safe production, prolonging service life and reducing drilling cost
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[0034] Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments described here are for illustration only, and are not intended to limit the present invention.
[0035] The main idea of the present invention is to change the drilling sequence of traditional drilling, and only use one wellbore to sequentially drill a vertical section, a deflection section, a deflection stabilization section, a deflection enhancement section, and at least one horizontal section extending along the coal seam. Use the horizontal section to provide the drainage channel of the coal seam and the analysis channel of the coalbed methane; use the stabilizing section to place drainage equipment, and the stabilizing section can also realize the function of coal seam to generate coal powder during the collection and drainage of the vertical well in the prior art, so that With one well, the functions...
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