. Bulletin . pass through the orifice,and B represents the timeair requires to pass throughthe orifice, the specificgravity of the gas will be presented by ( ^ ). a re o — — 2 — 3 — USE OF THE PITOT TUBEFOR MEASURING THEOPEN FLOW OF GASWELLS. The quantity of naturalgas that is discharged froma well is usually measuredby means of a Pitot tube.(Fig. 4.) This instrumentdirectly measures the veloc-ity of the gas flow. In itsmost accurate form it con-sists essentially of two parts,first a tube pointing up-stream for measuring thedynamic pressure and sec-ond a means of determining the static pressur
. Bulletin . pass through the orifice,and B represents the timeair requires to pass throughthe orifice, the specificgravity of the gas will be presented by ( ^ ). a re o — — 2 — 3 — USE OF THE PITOT TUBEFOR MEASURING THEOPEN FLOW OF GASWELLS. The quantity of naturalgas that is discharged froma well is usually measuredby means of a Pitot tube.(Fig. 4.) This instrumentdirectly measures the veloc-ity of the gas flow. In itsmost accurate form it con-sists essentially of two parts,first a tube pointing up-stream for measuring thedynamic pressure and sec-ond a means of determining the static pressure. Two pressures arethus obtained. Their difference as read on a U gage gives the velocityor impact pressure of the flowing gas. As ordinarily used for field work the static pressure of the gas flowis not obtained, the instrument consisting simply of a small tube,which is inserted in the flowing gas (a, fig. 4), just inside the pipe ortubing, a distance of one-fourth to one-third of the pipes diameter. — 3 — 2 — 4—
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectminesandmineralresou
