دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: The float shoe that is installed in the bottom of the casing string and can adjust the volume of drilling fluid in the casing. There is a valve in the float shoe. Only when the pressure of drilling fluid is big enough to open the valve can the drilling fl

n: The casing float shoe in which is installed by check valve. There are two kinds of ball float shoe: cement and aluminum alloy.

n: a cement wiper plug that precedes cement slurry down the casing. The plug wipes drilling mud off the walls of the casing and prevents it from contaminating the cement. See cementing, wiper plug. bottompull method n: an offshore pipeline construction technique in which the pipe string remains below the surface while it is towed to its final location.

n: See bottom wiper plug.

in cementing, the first plug pumped in cementing with the two plug system. It isolates the mud and cement slurry and allows passage of the cement slurry when the plug “bumps” or reaches the float shoe or float collar. It is hollow with a diaphragm that is

n: see float shoe.

n: The Steel and round nipple with back pressure control valve, installed at the bottom of casing string. Leading casing entering into the wellbore and preventing drill fluid entering into the casing to decrease the weight of casing.

n: The casing float or non-return valve of float shoe, allowing fluid one way flowing from top to bottom through casing.

n: See casing float shoe.

n: See casing float shoe.

n: refer to double vale float collar

n: the jet dribe shoe with a back pressure valve

n: a kind of casing shoe with cataclinal side openings around the bottom of the float valve