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Russian translation: гидравлическое давление на единицу площади поперечного сечения долота
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15:29 Sep 23, 2007
English to Russian translations [PRO] Tech/Engineering - Petroleum Eng/Sci / drilling
English term or phrase:HSI
Primarily, and according to all above data, to obtain an adequate hole cleaning, a minimum flow rate of 340.8 gpm must be applied along the whole 12.25” hole.
And, on the other end, a maximum of about 1222 gpm can be allowed to avoid turbulent flow, as shown on the following graph.
Working between these two limits, hydraulics optimization will be obtained with 1090 gpm, 0.583 TFA for HSI and with 1325 gpm, 0.914 TFA, for Impact Force.
However, as using these limits, it may produce very high stand pipe pressures, as high as 7600 psi for the HSI optimization and 5000 psi for the Impact Force optimization, an intermediate TFA of around 0.7 in2 and a flow rate of 700 gpm, as recommended by the bit manufacturer, can be used.