6,000 ft of 7-in C-75 grade of casing string will be run in a borehole having a diameter of 8.5-1m. The casing has a unit weight of 38 Ibm/ft and a wall thickness of 0.540-in. Mud weight used to run the casing into the borehole is 10 lbm/gal (ppg). a) Calculate the weight of casing string in the air. b) Calculate the hook load when the casing is in the borehole. c) Calculate the borehole capacity in terms of bbl/ft. d) Calculate the borehole capacity in terms of bbl. e) Calculate the displacement of the casing in terms of bbl/ft. ) Calculate the displacement of the casing in terms of bbl, g) Calculate the volume of cement slurry to fill the annulus in terms of bbl and cuft assuming a excess volume factor of 1.5) h) Calculate the maximum length of the casing if the rig used for this operation can handle 250,000 Ibf of hook load.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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6,000 ft of 7-in C-75 grade of casing string will be run in a borehole having a diameter of
8.5-m. The casing has a unit weight of 38 lbm/ft and a wall thickness of 0.540-in. Mud weight used
to run the casing into the borehole is 10 lbm/gal (ppg).
a) Calculate the weight of casing string in the air.
b) Calculate the hook load when the casing is in the borehole.
c) Calculate the borehole capacity in terms of bbl/ft.
d) Calculate the borehole capacity in terms of bbl.
e) Calculate the displacement of the casing in terms of bbl/ft.
) Calculate the displacement of the casing in terms of bbl,
g) Calculate the volume of cement slurry to fill the annulus in terms of bbl and cuft assuming a excess
volume factor of 1.5)
h) Calculate the maximum length of the casing if the rig used for this operation can handle 250,000
Ibf of hook load.
i) The casing gets stuck at bottom of the borehole while running the string. Calculate the maximum
pulling force that the driller can apply at the surface to get free the casing assuming a safety factor
of 1.2.
Transcribed Image Text:6,000 ft of 7-in C-75 grade of casing string will be run in a borehole having a diameter of 8.5-m. The casing has a unit weight of 38 lbm/ft and a wall thickness of 0.540-in. Mud weight used to run the casing into the borehole is 10 lbm/gal (ppg). a) Calculate the weight of casing string in the air. b) Calculate the hook load when the casing is in the borehole. c) Calculate the borehole capacity in terms of bbl/ft. d) Calculate the borehole capacity in terms of bbl. e) Calculate the displacement of the casing in terms of bbl/ft. ) Calculate the displacement of the casing in terms of bbl, g) Calculate the volume of cement slurry to fill the annulus in terms of bbl and cuft assuming a excess volume factor of 1.5) h) Calculate the maximum length of the casing if the rig used for this operation can handle 250,000 Ibf of hook load. i) The casing gets stuck at bottom of the borehole while running the string. Calculate the maximum pulling force that the driller can apply at the surface to get free the casing assuming a safety factor of 1.2.
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