2022
DOI: 10.32604/fdmp.2022.018012
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Calculation of the Gas Injection Rate and Pipe String Erosion in Nitrogen Drilling Systems

Abstract: Detailed information is provided for the design and construction of nitrogen drilling in a coal seam. Two prototype wells are considered. The Guo model is used to calculate the required minimum gas injection rate, while the Finnie, Sommerfeld, and Tulsa models are exploited to estimate the ensuing erosion occurring in pipe strings. The calculated minimum gas injection rates are 67.4 m 3 /min (with water) and 49.4 m 3 /min (without water), and the actual field of use is 90-120 m 3 /min. The difference between t… Show more

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