دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: The pressure within a system caused by fluid friction or an induced resistance to flow through the system. Hydraulic Thru-Tubing Fishing tools are typically operated using back pressure created by fiow through a nozzle.

a pressure caused by a restriction or fluid head that exerts an opposing pressure to flow.

n: see drill pipe float.

n: refer to”drill pipe flot“

the primary, bottom hole valve in the float collar or shoe that allow the casing to self fill while running and allows the cement to pass into the annulus but helps prevent cementing U-tubing after the job. Drillable and subject to erosion wear.

retrievable thru-tubing gun.

n: a cement wiper plug that follows cement slurry down the casing. It goes before the drilling mud used to displace the cement from the casing and separates the mud from the sluny. See cementing, wiper plug.

in cementing, the last plug pumped in cementing with the two plug system. It isolates the displacement fluid and cement slurry. It helps keep the heavy cement slurry from reversing or U-tubing back into the wellbore while the cement slurry is still unset.

n: the action of fluids flowing in a U-tube (as heavy mud forcing lighter mud down the drill stem and up the annulus).