Welding: Principles and Applications (MindTap Course List)
8th Edition
ISBN: 9781305494695
Author: Larry Jeffus
Publisher: Cengage Learning
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Textbook Question
Chapter 5, Problem 9R
What causes root suck-back or a concave root face?
Expert Solution & Answer
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Students have asked these similar questions
a.
Calculate the Tap Drill Size, show all working out
M20 x2.5
(11)
3/4" BSW
5/16" BSW 18
b) Based in the stuck pipe case in the last page answer the
following questions:
i. What do you consider the Stuck Pipe Mechanism is?
ii. What contributed to these Stuck Pipe Incidents and
explain the root cause?
iii. Was the correct freeing method applied?
iv. What information do you need to be able to advise your
preferred action plan?
v. Would you attempt to free?
(3 marks)
Well Data:-
Hole Size / Depth AH : 5-7/8" - 3526 m MD
Pump Rate 1050 Ipm
Mud: KCVPAC, 1.38 kg/l, PV/YP:14/25, WL:3.9 ml
Formation : Sand/Siltstone (3021 m), Limestone (3085
m)
Claystone (3109 m), Sandstone (3215 m)
Csa/Well Trajectory/BHA:
7" casing shoe: 2885 m MD, 39 deg, the steady drop from
39 deg to 8 deg at 3400 m
BHA - Drilling: Bit, NBS, ShockSub, SS, MWD, NMSS,
NMDC, SS, Circ.Sub, 3DC, SS, 3DC, SS, 3DC, Lo-Torg
subs, DC, Jar, DC, HDWP
Brief Well History:-
Drilled 5-7/8" hole with mudmotor from 2612-3406 m. Took
survey (8 deg incl). POH, backreamed all tight spots.
RIH with rotary BHA and encountered…
Riser is designed so as to ?
Chapter 5 Solutions
Welding: Principles and Applications (MindTap Course List)
Ch. 5 - List some applications that use low-pressure...Ch. 5 - List some applications that use medium-pressure...Ch. 5 - List some applications that use high-pressure...Ch. 5 - Describe the differences between pipe and tubing.Ch. 5 - What are the advantages of welded piping systems...Ch. 5 - Why must the ends of pipe be beveled before being...Ch. 5 - How can the ends of a pipe be beveled?Ch. 5 - Why is the end of a pipe beveled at a 371/2 angle?Ch. 5 - What causes root suck-back or a concave root face?Ch. 5 - Why are arc strikes outside the welding zone...
Ch. 5 - What are the purposes of backing rings?Ch. 5 - What is the purpose of a hot pass?Ch. 5 - Why must the weld crater be cleaned before...Ch. 5 - What is the maximum width of the cover pass? Why?Ch. 5 - When is the 1G welding position used?Ch. 5 - What can make welding in the 2G vertical fixed...Ch. 5 - What supports the welds on a 2G pipe joint?Ch. 5 - On 5G welds, what usually determines the direction...Ch. 5 - What angle is the pipe at in the 6G position?Ch. 5 - In addition to continuously changing the weld...
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