دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the location of the bottom of a string of casing that is cemented in a well. Typically, a casing shoe is made up on the end of the casing at this point.

n: The position of the bottom of casing string after cementing.

the set point of the end of casing. Should be in an impermeable, stable formation.

n: a procedure whereby the formation immediately below the casing shoe is subjected to a pressure equal to the pressure expected to be exerted later by the drilling fluid or by the drilling fluid and the back-pressure created by a kick. See leakoff test.

a LOT or an FIT test (check specifics for details),a pressurized test after primary cementing to make sure the bottom most seal with the formation will handle pressures needed for drilling the rest of the well.

n: the amount of pressure that the casing seat can take without fracturing. It is calculated from the height and volume of the kick in the well.

n: after overflow and shut in, the maximum difference the fluid density in the hole from the equivalent density that converted by casing allowable pressure and volume pressure in the holebore unless it happens overflow.

n: a gradual pressurising of the casing after the blowout preventers have been installed to permit estimation of the formation fracture pressure at the casing seat.

LOT, a drilling test. A LOT is intended to determine the point of leak-off. Compare to FIT.