How many strokes are required to fill up the hole after 10 stands being pulled wet? e What is the mud velocity in the annulus?

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
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How many strokes are required to fill up the hole after 10 stands being pulled wet?
e
What is the mud velocity in the annulus?
Transcribed Image Text:How many strokes are required to fill up the hole after 10 stands being pulled wet? e What is the mud velocity in the annulus?
THE FOLLOWING INFORMATION IS TO BE USED IN THE NEXT 5 (FIVE) QUESTIONS.
Consider the following data for a drillstring composed of only drillpipes (DP) and bit:
Drillstring:
• DP OD = 5 in.
• DP ID = 4.2 in.
• DP stand length = 90 ft
Mud pump:
• Type = Triplex, single acting
• Liner dia. = 6.5 in.
• Stroke length = 12 in.
• Volumetric efficiency = 95%
• Flow rate = 400 gpm
Well:
• Depth (measured) = 12,000 ft
• Hole size = 9 in.
%3D
Transcribed Image Text:THE FOLLOWING INFORMATION IS TO BE USED IN THE NEXT 5 (FIVE) QUESTIONS. Consider the following data for a drillstring composed of only drillpipes (DP) and bit: Drillstring: • DP OD = 5 in. • DP ID = 4.2 in. • DP stand length = 90 ft Mud pump: • Type = Triplex, single acting • Liner dia. = 6.5 in. • Stroke length = 12 in. • Volumetric efficiency = 95% • Flow rate = 400 gpm Well: • Depth (measured) = 12,000 ft • Hole size = 9 in. %3D
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