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: (obsolete) a device for sealing the annular space between the top of a liner and the existing casing string.

n: A tool used to pack the annular of the top of liner and upper casing.

n: a swage nipple, usually beveled, installed on the top of a string of pipe that does not extend to the surface. It prevents a smaller string of pipe or tools from hanging up on the top of the column when it is run into the well.

n: The joint that is installed at the top of the casing string which doesnt reach to the earth surface.

n: The casing string is formed by connecting casing with collar.

n: The chart for illustrating different steel grade, wall thickness, quality, hardness and safety factor of casing in designing casing string.

n: see float collar.

n: The collar with back pressure control valve, installed at the bottom of casing string. Prevents drill fluid entering into casing and decreases the weight of casing by buoyance. Also prevent cement recirculating when cementing.

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: a perforating gun run into the casing string. Most perforating guns are run into the well through the tubing string. casing hanger n: a circular device with a frictional gripping arrangement of slips and packing rings used to suspend casing from a casinghead in a well.

n: A device installed with shaped charge or bulletfor, used for casing perforating.

a large perforating gun, run into a well without tubing.

n: A special component made up on top of the casing string to suspend the casing when it is landed in the previous casing housing.

a support that is screwed onto the casing and fits into the casing head.

n: The component installed in the casing string when casing installation.