Drill pipes of 1000 meter original length which is between top drive drilling motor and bottom hole assembly (HWDP, collar and drill bit) is lowered into the well. The specification of drill pipe is as follows: OD=200 mm, ID=175 mm, E = 50 GPa, G=77.2 GPa weight : drill pipe = 100,000 N , bottom hole assembly = 35,000 N Before the bottom hole assembly touch the rock formation: а) Calculate the reaction force between drill pipe and top drive drilling motor b) Calculate the elongation of drill pipe After the bottom hole assembly rest/touch on the rock formation, the elongation of the drill pipe reduces by half. c) Calculate the reaction force between drill pipe and top drive drilling motor. d) Knowing that the top steel drill pipe rotates through two complete revolutions before the drill bit starts to operate, determine the maximum shearing stress caused in the pipe by torsion.

Drill pipes of 1000 meter original length which is between top drive drilling motor and bottom hole assembly (HWDP, collar and drill bit) is lowered into the well. The specification of drill pipe is as follows: OD=200 mm, ID=175 mm, E = 50 GPa, G=77.2 GPa weight : drill pipe = 100,000 N , bottom hole assembly = 35,000 N Before the bottom hole assembly touch the rock formation: а) Calculate the reaction force between drill pipe and top drive drilling motor b) Calculate the elongation of drill pipe After the bottom hole assembly rest/touch on the rock formation, the elongation of the drill pipe reduces by half. c) Calculate the reaction force between drill pipe and top drive drilling motor. d) Knowing that the top steel drill pipe rotates through two complete revolutions before the drill bit starts to operate, determine the maximum shearing stress caused in the pipe by torsion.

Name: Drill pipes of 1000 meter original length which is between top drive
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Description: Drill pipes of 1000 meter original length which is between top drive drilling motor and bottomhole assembly (HWDP, collar and drill bit) is lowered into the well.The specification of drill pipe is as follows:OD=200 mm, ID=175 mm, E = 50 GPa, G=77.2

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Drill pipes of 1000 meter original length which is between top drive drilling motor and bottom hole assembly (HWDP, collar and drill bit) is lowered into the well. The specification of drill pipe is as follows: • OD=200 mm, ID=175 mm, E = 50 GPa, G= 77.2 GPa weight : drill pipe = 100,000 N , bottom hole assembly = 35,000 N Before the bottom hole assembly touch the rock formation: a) Calculate the reaction force between drill pipe and top drive drilling motor b) Calculate the elongation of drill pipe After the bottom hole assembly rest/touch on the rock formation, the elongation of the drill pipe reduces by half. c) Calculate the reaction force between drill pipe and top drive drilling motor. d) Knowing that the top steel drill pipe rotates through two complete revolutions before the drill bit starts to operate, determine the maximum shearing stress caused in the pipe by torsion.
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