The document discusses the components and functions of a drill string. It describes the main components as the kelly, drill pipe, drill collars, and drilling bit. It explains the drill string provides functions like imposing weight on the bit, transmitting rotation, providing a fluid conduit, and allowing tools to be run in the hole. It also discusses calculating the neutral point where there is no compression or tension in the pipe, using factors like weight on bit, pipe weight, mud density, and differential pressure. The document concludes by covering selection considerations for drill pipes based on tension loading, collapse resistance, and torsional strength needed for deviated holes.
Hi,friend,
This presentation will give some effectiveness for entry level drilling engineers!
Thanks and Best regards,
Myo Min Htet
MPRL E&P Pte Ltd.
+95933336767
myominhtetz2012@gmail.com
Hi,friend,
This presentation will give some effectiveness for entry level drilling engineers!
Thanks and Best regards,
Myo Min Htet
MPRL E&P Pte Ltd.
+95933336767
myominhtetz2012@gmail.com
Drilling fluids are absolutely essential during the drilling process and considered the primary well control.
Know more now about such a very important component of the drilling process.
Well Control is very important in Petroleum Engineering and necessary for being able to avoid hazards and controlling them as much as possible. This presentation provides valuable notes, instructions, and information about Well Control.
Presentation defines well completion as a sub-discipline of drilling operations. It introduces the various components of the well completion process. It then describes and explains basic areas of the completion process including the bottom-hole completion process, the perforation process, the upper completion with packers, tubing component equipment and devices, tubing configurations, the horizontal completions and the Christmas tree(production head)
This is an academic lecture for Diploma in Engineering 7th Semester Mining and Mine Survey Technology. The Course related to this presentation is Well completion and testing
The 3rd presentation of a series of presentations on Operations Geology. Very basic, just to introduce beginners to operations geology. I hope the end users will find this and the following presentations very helpful.
Complete Casing Design with types of casing, casing properties, casing functions, design criteria and properties used for designing and one numerical problem
Episode 44 : Flow Behavior of Granular Materials and PowdersPart IIISAJJAD KHUDHUR ABBAS
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Law of hydrodynamics do not apply to the flow of solid granular materials through orifices:
Pressure is not distributed equally in all directions due to the development of arches and to frictional forces between the granules.
The rate of flow is not proportional to the head, except at heads smaller than the container diameter.
No provision is made in hydrodynamics for size and shape of particles, which greatly influence the flow rate.
SAJJAD KHUDHUR ABBAS
Ceo , Founder & Head of SHacademy
Chemical Engineering , Al-Muthanna University, Iraq
Oil & Gas Safety and Health Professional – OSHACADEMY
Trainer of Trainers (TOT) - Canadian Center of Human
Development
Drilling fluids are absolutely essential during the drilling process and considered the primary well control.
Know more now about such a very important component of the drilling process.
Well Control is very important in Petroleum Engineering and necessary for being able to avoid hazards and controlling them as much as possible. This presentation provides valuable notes, instructions, and information about Well Control.
Presentation defines well completion as a sub-discipline of drilling operations. It introduces the various components of the well completion process. It then describes and explains basic areas of the completion process including the bottom-hole completion process, the perforation process, the upper completion with packers, tubing component equipment and devices, tubing configurations, the horizontal completions and the Christmas tree(production head)
This is an academic lecture for Diploma in Engineering 7th Semester Mining and Mine Survey Technology. The Course related to this presentation is Well completion and testing
The 3rd presentation of a series of presentations on Operations Geology. Very basic, just to introduce beginners to operations geology. I hope the end users will find this and the following presentations very helpful.
Complete Casing Design with types of casing, casing properties, casing functions, design criteria and properties used for designing and one numerical problem
Episode 44 : Flow Behavior of Granular Materials and PowdersPart IIISAJJAD KHUDHUR ABBAS
Episode 44 : Flow Behavior of Granular Materials and PowdersPart III
Law of hydrodynamics do not apply to the flow of solid granular materials through orifices:
Pressure is not distributed equally in all directions due to the development of arches and to frictional forces between the granules.
The rate of flow is not proportional to the head, except at heads smaller than the container diameter.
No provision is made in hydrodynamics for size and shape of particles, which greatly influence the flow rate.
SAJJAD KHUDHUR ABBAS
Ceo , Founder & Head of SHacademy
Chemical Engineering , Al-Muthanna University, Iraq
Oil & Gas Safety and Health Professional – OSHACADEMY
Trainer of Trainers (TOT) - Canadian Center of Human
Development
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The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
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The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
2. Introduction
• The drill string constitutes the connection between the
rig and the drill bit.
• The main components of the drill string are:
(1) kelly
(2) drill pipe
(3) drill collar and
(4) drilling bit
• heavy-weight drill pipe, jars, stabilizers, reamers and
various subs (kelly sub, bit sub, shock sub, cross-over
sub, etc.)
2Department of Petroleum Engineering ,KL University , Guntur
3. The drill string provides multiple functions like:
1. Imposes required weight on the bit
2. Transmits rotary motion from the kelly to the drill bit
3. Provides a two way fluid conduit from the rig to the
drill bit
4. Medium to lower and raise the drill bit in the hole
5. Stabilizes the bottom hole assembly (BHA) and
minimizes vibrations
6. Permits pressure and formation fluid testing through
the drill string
7. Allows through-pipe running of formation evaluation
tools when they can not be run in the open hole
3
Department of Petroleum Engineering ,KL University , Guntur
4. Neutral point
• The neutral point occurs a at the depth where there
is no compression or tension in the pipe. You can
calculate it dividing the flotation force by the
nominal weight per foot of pipe.
• Long slender columns like DP, have low resistance to
bending and tend to fail by buckling if
-Force at bottom causes neutral point to move up.
4
Department of Petroleum Engineering ,KL University , Guntur
5. Calculation Of Neutral point
• Total length of the drill string is under tension due to its
own weight(partly counterbalanced by the buoyancy).
• Part of destruction force is obtained by a certain amount
of weight on bit (WOB) which forces the bit against the
rock.
• lower part of the drill string is set under compression.
• Due to the geometrical shape of the drill string
(length/diameter ratio), it has a tendency to buckle. To
reduce this buckling tendency, it is aimed to design the
drill string in such a way that the neutral point is located
inside drilling collars
Department of Petroleum Engineering ,KL University , Guntur 5
7. The neutral point can be calculated for different
scenarios as:
• In the absence of mud (drilling with air as drilling fluid):
Ln =WOB/12.Ws
• In the presence of drilling mud:
Ln =WOB/12. (Ws − ρs.As)
• When differential pressure is considered as well, the
neutral point is found at:
Ln =WOB/12. (Ws − ρe.Ae + ρi.Ai)
Department of Petroleum Engineering ,KL University , Guntur 7
9. Selection Of Drill Pipes
• Generally subjected to 3 types of loadings.
(1)Tension Loading :
If the drill string is to consist of more than one size
the pipe having the lowest capacity should be placed
just above the drill collars
Department of Petroleum Engineering ,KL University , Guntur 9
10. (2) Collapse Loading:
An external pressure which is greater than the
internal pressure resulting in collapse of drill pipe .
10
Department of Petroleum Engineering ,KL University , Guntur
11. (3) Torsional Strength:
It is critical when drilling in deviated holes, deep
holes, reaming or when the pipe is stuck.
• T=(725.4*HP)/RPM
Where, T=torque applied on drill pipe(kg-m).
HP=horse power used to rotate the pipe.
RPM=revolutions per minute.
Department of Petroleum Engineering ,KL University , Guntur 11