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nombre de metres fores

drilling footage

industries charbonnière et minière - iate.europa.eu

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A new attempt of a cbm tree-like horizontal well: a pilot case of well zs 1p-5h in the qinshui basin... The well included one major hole, 13 laterals, and 26 sub-laterals, with a total drilling footage of 12288 m, a total coal bed footage of 9512 m, and a total pure coal footage of 9408 m....

général - core.ac.uk - PDF: doaj.org

A new attempt of a cbm tree-like horizontal well: a pilot case of well zs 1p-5h in the qinshui basin ... The well included one major hole, 13 laterals, and 26 sub-laterals, with a total drilling footage of 12288 m, a total coal bed footage of 9512 m, and a total pure coal footage of 9408 m....

Factory-like optimum drilling design of cluster well in jimsar well block... The design can improve the proportion of composite drilling footage....

PDF: doaj.org

Individual drilling bit design and optimization in mahu area... Single PDC bit increases 90% of the drilling footage....

PDF: doaj.org

Development of pdc drill bits for mwd directional drilling in underground coal mine ...4.12m/h and the total drilling footage was 1001.6m....