By Edwin Lee Rawlins
Read Online or Download Back-Pressure Data on Natural-Gas Wells and Their Application to Production Practices. United States. Bureau of Mines. Monograph 7 PDF
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Extra info for Back-Pressure Data on Natural-Gas Wells and Their Application to Production Practices. United States. Bureau of Mines. Monograph 7
Per sq. in. absolute, P, 1 25 2 25 .... Exponent of relationship. 2)n. Rate of delivery, M eu. ft. , P. 6 Back pressure at sand. lb. per sq. in. 75 .. COMPARING ABSOLUTE OPEN FLOW WITH MAXIMUM DELIVERIES THAT COULD BE PRODUCED THROUGH DIFFERENT SIZES OF PRODUCING STRINGS The difference between the absolute open flow of a gas well and the maximum delivery rate of gas from the well through any siz~ of producing string is due to the back pressure imposed at the sand by pressure drop in the producing string due to friction, and that placed on the sand by the pressure due to the weight of the colurnn of gas.
L:::::::::::I ......... , .. .. I I I .. I i Working pressure at wellhead, lb. per sq. in. gage I 736 543 667 709 Rate of flow, M cu. ft. per 24 hours Shut-in Jtessure at we head, lb. per sq. in. gage .. I Working pressure at wellhead, lb. per sq. in. gage Rate of flow, M cu. ft. per 24 hours 423 509 663 751 771 788 9,400 8,420 5,800 3,545 2,880 2,220 819 .. 3,590 7,650 5,410 4,390 .. After open flow of well .. .. .. I Pwtting data After open ,flow of well Before open flow of well Reading no.
Curves F, G, and H, fig. 7. Pressure of liquid column in well not considered, curve F, fig. 7. Pressure of liquid column iq well considered, curve H. fig. 7. into consideration any correction for liquid in the well bore. Curve B shows the results of the test conducted after the well was blown and gives the delivery capacities of the well at different back pressures under the conditions of the test. Curve C was obtained by adding the pressure of 50 pounds per square inch (difference between the shut-in pressure for the two tests) to the shut-in formation pressure and to each of the back pressures at the sand as calculated for curve A.
Back-Pressure Data on Natural-Gas Wells and Their Application to Production Practices. United States. Bureau of Mines. Monograph 7 by Edwin Lee Rawlins
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