1) The document discusses different types of drill bits used in drilling operations including PDC, natural diamond, TSP, impregnated diamond, roller cone, tooth, and insert bits.
2) It explains the IADC classification system for drill bits which codes them based on factors like cutting structure, bearing type, and application in soft to hard formations.
3) The IADC dull grading code characterizes used drill bits according to wear characteristics like erosion, broken cutters, and reasons for being pulled such as being worn out.
Drilling Bit Introduction and bit Selection (Part 1)Amir Rafati
(PART 1,2 & 3)
1. Drilling mechanisms
2. Bit classifications (fixed cutter and roller cone bits)
3. IADC code descriptions
4. Tri-cone bits life time
5. Geometrical analysis of roller cone bits
• Fundamentals of bit design
• Basics of cone geometry design
• Oversize angle
• Offset
• Teeth and inserts
• Additional design criteria: tooth to tooth and groove clearances and etc.
• Cone-shell thickness
• Bearings factors
• Rock bit metallurgy
• Heat treatment
• Legs and cones material
• Tungsten carbide materials
• Legs and cones hard facing
• Tungsten carbide grade selection for inserts
• Bearings, seals and lubrication
• Bearing shape
• Bearing precisions and geometry
• Seal systems and seal details
• Dull grading system
6. Geometrical analysis of PDC bits
• PDC materials and constructions
• Matrix materials testing
• Differs between matrix & steel body
• Matrix body bits manufacturing
• Steel body bits manufacturing
• PDC bit design parameters: mechanical, hydraulic, rock properties
• Weld strength of PDC bits and cutters
• PDC cutter manufacturing process
• Tsp cutter properties vs PDC
• The influences of bit profile and profile elements
• PDC forces
• PDC bit stability
• PDC bit steer-ability
• Back rake
• Side rake
• Depth of cut
• Cutter exposure
• Cutter density
• Thermal damage and degradation of cutters
• Cutting mechanics
• PDC cutter substrate and its thickness
• Cutting structure elements
• Single set bladed cutting structures
• Plural set bladed cutting structures
• Dull grading system
7. ROP management based on drilling parameters
• WOB
• Rpm
• Sold content of mud
• Mud weight
• Cutter shape
• Cutters geometry
• Depth
• Abnormal pressure
• Drilling formation properties
Drilling Bit Introduction and bit Selection (Part 3)Amir Rafati
(PART 1,2 & 3)
1. Drilling mechanisms
2. Bit classifications (fixed cutter and roller cone bits)
3. IADC code descriptions
4. Tri-cone bits life time
5. Geometrical analysis of roller cone bits
• Fundamentals of bit design
• Basics of cone geometry design
• Oversize angle
• Offset
• Teeth and inserts
• Additional design criteria: tooth to tooth and groove clearances and etc.
• Cone-shell thickness
• Bearings factors
• Rock bit metallurgy
• Heat treatment
• Legs and cones material
• Tungsten carbide materials
• Legs and cones hard facing
• Tungsten carbide grade selection for inserts
• Bearings, seals and lubrication
• Bearing shape
• Bearing precisions and geometry
• Seal systems and seal details
• Dull grading system
6. Geometrical analysis of PDC bits
• PDC materials and constructions
• Matrix materials testing
• Differs between matrix & steel body
• Matrix body bits manufacturing
• Steel body bits manufacturing
• PDC bit design parameters: mechanical, hydraulic, rock properties
• Weld strength of PDC bits and cutters
• PDC cutter manufacturing process
• Tsp cutter properties vs PDC
• The influences of bit profile and profile elements
• PDC forces
• PDC bit stability
• PDC bit steer-ability
• Back rake
• Side rake
• Depth of cut
• Cutter exposure
• Cutter density
• Thermal damage and degradation of cutters
• Cutting mechanics
• PDC cutter substrate and its thickness
• Cutting structure elements
• Single set bladed cutting structures
• Plural set bladed cutting structures
• Dull grading system
7. ROP management based on drilling parameters
• WOB
• Rpm
• Sold content of mud
• Mud weight
• Cutter shape
• Cutters geometry
• Depth
• Abnormal pressure
• Drilling formation properties
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.
Drilling Bit Introduction and bit Selection (Part 1)Amir Rafati
(PART 1,2 & 3)
1. Drilling mechanisms
2. Bit classifications (fixed cutter and roller cone bits)
3. IADC code descriptions
4. Tri-cone bits life time
5. Geometrical analysis of roller cone bits
• Fundamentals of bit design
• Basics of cone geometry design
• Oversize angle
• Offset
• Teeth and inserts
• Additional design criteria: tooth to tooth and groove clearances and etc.
• Cone-shell thickness
• Bearings factors
• Rock bit metallurgy
• Heat treatment
• Legs and cones material
• Tungsten carbide materials
• Legs and cones hard facing
• Tungsten carbide grade selection for inserts
• Bearings, seals and lubrication
• Bearing shape
• Bearing precisions and geometry
• Seal systems and seal details
• Dull grading system
6. Geometrical analysis of PDC bits
• PDC materials and constructions
• Matrix materials testing
• Differs between matrix & steel body
• Matrix body bits manufacturing
• Steel body bits manufacturing
• PDC bit design parameters: mechanical, hydraulic, rock properties
• Weld strength of PDC bits and cutters
• PDC cutter manufacturing process
• Tsp cutter properties vs PDC
• The influences of bit profile and profile elements
• PDC forces
• PDC bit stability
• PDC bit steer-ability
• Back rake
• Side rake
• Depth of cut
• Cutter exposure
• Cutter density
• Thermal damage and degradation of cutters
• Cutting mechanics
• PDC cutter substrate and its thickness
• Cutting structure elements
• Single set bladed cutting structures
• Plural set bladed cutting structures
• Dull grading system
7. ROP management based on drilling parameters
• WOB
• Rpm
• Sold content of mud
• Mud weight
• Cutter shape
• Cutters geometry
• Depth
• Abnormal pressure
• Drilling formation properties
Drilling Bit Introduction and bit Selection (Part 3)Amir Rafati
(PART 1,2 & 3)
1. Drilling mechanisms
2. Bit classifications (fixed cutter and roller cone bits)
3. IADC code descriptions
4. Tri-cone bits life time
5. Geometrical analysis of roller cone bits
• Fundamentals of bit design
• Basics of cone geometry design
• Oversize angle
• Offset
• Teeth and inserts
• Additional design criteria: tooth to tooth and groove clearances and etc.
• Cone-shell thickness
• Bearings factors
• Rock bit metallurgy
• Heat treatment
• Legs and cones material
• Tungsten carbide materials
• Legs and cones hard facing
• Tungsten carbide grade selection for inserts
• Bearings, seals and lubrication
• Bearing shape
• Bearing precisions and geometry
• Seal systems and seal details
• Dull grading system
6. Geometrical analysis of PDC bits
• PDC materials and constructions
• Matrix materials testing
• Differs between matrix & steel body
• Matrix body bits manufacturing
• Steel body bits manufacturing
• PDC bit design parameters: mechanical, hydraulic, rock properties
• Weld strength of PDC bits and cutters
• PDC cutter manufacturing process
• Tsp cutter properties vs PDC
• The influences of bit profile and profile elements
• PDC forces
• PDC bit stability
• PDC bit steer-ability
• Back rake
• Side rake
• Depth of cut
• Cutter exposure
• Cutter density
• Thermal damage and degradation of cutters
• Cutting mechanics
• PDC cutter substrate and its thickness
• Cutting structure elements
• Single set bladed cutting structures
• Plural set bladed cutting structures
• Dull grading system
7. ROP management based on drilling parameters
• WOB
• Rpm
• Sold content of mud
• Mud weight
• Cutter shape
• Cutters geometry
• Depth
• Abnormal pressure
• Drilling formation properties
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.
The fifth 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.
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 Bit Introduction and bit Selection (Part 2)Amir Rafati
(PART 1,2 & 3)
1. Drilling mechanisms
2. Bit classifications (fixed cutter and roller cone bits)
3. IADC code descriptions
4. Tri-cone bits life time
5. Geometrical analysis of roller cone bits
• Fundamentals of bit design
• Basics of cone geometry design
• Oversize angle
• Offset
• Teeth and inserts
• Additional design criteria: tooth to tooth and groove clearances and etc.
• Cone-shell thickness
• Bearings factors
• Rock bit metallurgy
• Heat treatment
• Legs and cones material
• Tungsten carbide materials
• Legs and cones hard facing
• Tungsten carbide grade selection for inserts
• Bearings, seals and lubrication
• Bearing shape
• Bearing precisions and geometry
• Seal systems and seal details
• Dull grading system
6. Geometrical analysis of PDC bits
• PDC materials and constructions
• Matrix materials testing
• Differs between matrix & steel body
• Matrix body bits manufacturing
• Steel body bits manufacturing
• PDC bit design parameters: mechanical, hydraulic, rock properties
• Weld strength of PDC bits and cutters
• PDC cutter manufacturing process
• Tsp cutter properties vs PDC
• The influences of bit profile and profile elements
• PDC forces
• PDC bit stability
• PDC bit steer-ability
• Back rake
• Side rake
• Depth of cut
• Cutter exposure
• Cutter density
• Thermal damage and degradation of cutters
• Cutting mechanics
• PDC cutter substrate and its thickness
• Cutting structure elements
• Single set bladed cutting structures
• Plural set bladed cutting structures
• Dull grading system
7. ROP management based on drilling parameters
• WOB
• Rpm
• Sold content of mud
• Mud weight
• Cutter shape
• Cutters geometry
• Depth
• Abnormal pressure
• Drilling formation properties
Introduction of Directional Drilling
By Syamsu Setiabudi
• Reference and Coordinates SYSTEM
• Types AND Calculation of DIRECTIONAL Well Trajectories
• Directional SURVEY & TOOLS
• DIRECTIONAL DRILLING OPERATION
• BHA BASIC DESIGN & APPLICATION
A summary presentation of a 7" Liner job, demonstrating different components, mechanisms of liner hanger and other string components. Then a quick hint about cementing operation and some extra components involved in the job like the Handling equipment, VAM HT, ...etc.
The fifth 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.
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 Bit Introduction and bit Selection (Part 2)Amir Rafati
(PART 1,2 & 3)
1. Drilling mechanisms
2. Bit classifications (fixed cutter and roller cone bits)
3. IADC code descriptions
4. Tri-cone bits life time
5. Geometrical analysis of roller cone bits
• Fundamentals of bit design
• Basics of cone geometry design
• Oversize angle
• Offset
• Teeth and inserts
• Additional design criteria: tooth to tooth and groove clearances and etc.
• Cone-shell thickness
• Bearings factors
• Rock bit metallurgy
• Heat treatment
• Legs and cones material
• Tungsten carbide materials
• Legs and cones hard facing
• Tungsten carbide grade selection for inserts
• Bearings, seals and lubrication
• Bearing shape
• Bearing precisions and geometry
• Seal systems and seal details
• Dull grading system
6. Geometrical analysis of PDC bits
• PDC materials and constructions
• Matrix materials testing
• Differs between matrix & steel body
• Matrix body bits manufacturing
• Steel body bits manufacturing
• PDC bit design parameters: mechanical, hydraulic, rock properties
• Weld strength of PDC bits and cutters
• PDC cutter manufacturing process
• Tsp cutter properties vs PDC
• The influences of bit profile and profile elements
• PDC forces
• PDC bit stability
• PDC bit steer-ability
• Back rake
• Side rake
• Depth of cut
• Cutter exposure
• Cutter density
• Thermal damage and degradation of cutters
• Cutting mechanics
• PDC cutter substrate and its thickness
• Cutting structure elements
• Single set bladed cutting structures
• Plural set bladed cutting structures
• Dull grading system
7. ROP management based on drilling parameters
• WOB
• Rpm
• Sold content of mud
• Mud weight
• Cutter shape
• Cutters geometry
• Depth
• Abnormal pressure
• Drilling formation properties
Introduction of Directional Drilling
By Syamsu Setiabudi
• Reference and Coordinates SYSTEM
• Types AND Calculation of DIRECTIONAL Well Trajectories
• Directional SURVEY & TOOLS
• DIRECTIONAL DRILLING OPERATION
• BHA BASIC DESIGN & APPLICATION
A summary presentation of a 7" Liner job, demonstrating different components, mechanisms of liner hanger and other string components. Then a quick hint about cementing operation and some extra components involved in the job like the Handling equipment, VAM HT, ...etc.
This article include ISO PCD indexable insert, PCD milling inserts/PCD End Mills, PCD Boring Tools, PCD Forming Tools, PCD Grooving Tools, PCD Drill Bits and Non-standard PCD Inserts. Also together with Halnn PCD Materials.
No matter what problems, you can contact with us.
HAOJING HSS Saw Blade for Metal Cutting Industry AnalysisKisa Wu
Chinese Saw Blade Position in the World
The highest demand in the world are diamond blades and TCT blades for wood, HSS blade is the least. Diamond blades are nearly required in any countries, TCT blades are mostly exported to India, the value of HSS blades is the highlest.
Manufacturers and Exporters of diamond tools Resin Bonded Tools, Diamond Paste, Diamond Lapping Compound, Lapping Compound, Resin Metal Bond Wheels, Resin Metal Bond Diamond Wheels, Resin Metal Diamond Wheels, Resin Bond Diamond Wheels.
PCD cutting tools according to the material of PCD compact and welding allowance, grinding mode is also different, according to different processing industry, the direction of PCD cutting tool is divided into car PCD cutting tools and 3 c direction of PCD cutting tool, the two direction of PCD cutting tool grinding mode is also different, mainly in the direction shown by the processing industry under the way of grinding.
This document is a research paper about gears manufacturing and production technique, which is one of the most known domain of industrial engineering and production. since gears are used in many applications to transmit motion and movement. So study about them is a must in industrial engineering application.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
Contact with Dawood Bhai Just call on +92322-6382012 and we'll help you. We'll solve all your problems within 12 to 24 hours and with 101% guarantee and with astrology systematic. If you want to take any personal or professional advice then also you can call us on +92322-6382012 , ONLINE LOVE PROBLEM & Other all types of Daily Life Problem's.Then CALL or WHATSAPP us on +92322-6382012 and Get all these problems solutions here by Amil Baba DAWOOD BANGALI
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Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
COLLEGE BUS MANAGEMENT SYSTEM PROJECT REPORT.pdfKamal Acharya
The College Bus Management system is completely developed by Visual Basic .NET Version. The application is connect with most secured database language MS SQL Server. The application is develop by using best combination of front-end and back-end languages. The application is totally design like flat user interface. This flat user interface is more attractive user interface in 2017. The application is gives more important to the system functionality. The application is to manage the student’s details, driver’s details, bus details, bus route details, bus fees details and more. The application has only one unit for admin. The admin can manage the entire application. The admin can login into the application by using username and password of the admin. The application is develop for big and small colleges. It is more user friendly for non-computer person. Even they can easily learn how to manage the application within hours. The application is more secure by the admin. The system will give an effective output for the VB.Net and SQL Server given as input to the system. The compiled java program given as input to the system, after scanning the program will generate different reports. The application generates the report for users. The admin can view and download the report of the data. The application deliver the excel format reports. Because, excel formatted reports is very easy to understand the income and expense of the college bus. This application is mainly develop for windows operating system users. In 2017, 73% of people enterprises are using windows operating system. So the application will easily install for all the windows operating system users. The application-developed size is very low. The application consumes very low space in disk. Therefore, the user can allocate very minimum local disk space for this application.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Vaccine management system project report documentation..pdfKamal Acharya
The Division of Vaccine and Immunization is facing increasing difficulty monitoring vaccines and other commodities distribution once they have been distributed from the national stores. With the introduction of new vaccines, more challenges have been anticipated with this additions posing serious threat to the already over strained vaccine supply chain system in Kenya.
2. Objectives
At the end of this training session, you will be able to:
List the different type of bits
Describe the different rock failure mechanism
Describe the IADC (International Association of Drilling
Contractors) bit coding and dull bit gradingContractors) bit coding and dull bit grading
Describe the effect of change in weight on bit, rpm, hole size,
mud weight and solids content on bit performance
3. Introduction
Drilling bits selection is crucial to the performance of all drilling
projects.
Understanding the different types of bits and their respective
applications is a pre-requisite to bit selection.
Not only the right bit in the right application but also running it with
the right operating parameters.the right operating parameters.
Well engineers must stay abreast of the latest developments to
ensure optimum bit selection.
6. PDC (Polycrystalline Diamond
Compact)
Drill Bits
Fixed
Cutter
Roller
Cone
Use artificially made
diamonds
Run successfully with
downhole motors
Insert
Mill
Tooth
DiamondP D C
Natural
Diamond
Impregnated
DiamondT S P
Roller
Bearing
Journal
Bearing
Courtesy of
7. PDC bit: Elements
1. synthetic diamond
cutters
2. support structures for
the cutters
3. gauge protection
1
3
2
5
2
Courtesy of
3. gauge protection
inserts
4. Depth of cut limiters
5. nozzles.
Steel / Tungsten Carbide
8. PDC bit: Body Material
Steel body in
one piece
⇒ High precision
⇒ simple repair
⇒ no weld
Tungsten
Carbide matrix
on steel shell
⇒ Erosion resistant
9. 8 mm
11 mm
13 mm
16 mm
19 mm
PDC bit: Cutting Elements
BLADE
Courtesy of
PDC CUTTER
γγγγ
11. Diamond Bit Profiles
Shallow coneParabolicTaper or Double cone
Soft formation=> => => => => Hard formation
(More diamond coverage)
Low ROP
12. Diamond bit : Design
Size and spacing of diamonds determines its use
Widely spaced diamonds : large pieces of soft sand and shale
Medium spacing of large diamonds: wide range of sand, shale ,
limestone
Smaller diamonds set in close pattern: hard formationsSmaller diamonds set in close pattern: hard formations
13. Natural Diamond bit: Elements
Natural Diamonds =
hardest mineral
But brittle and Temp
dependant
Fluid circulation
important
Courtesy of
No cone , operates like
a single unit
Sensitive to shock and
variation
14. TSP (Thermally Stable Polycrystalline)
Drill Bits
Fixed
Cutter
Roller
Cone
Insert
Mill
Tooth
DiamondP D C
Natural
Diamond
Impregnated
DiamondT S P
Roller
Bearing
Journal
Bearing
Courtesy of
17. Impregnated Diamond: Blades
Formation: medium
hard to very hard,
ABRASIVE!
Impregnated cutting
element.
Distributed in a
tungsten carbide
matrix.
Bit Blade
Matrix
Courtesy of
matrix.
During heating
(furnace) the
Segments are bonded
to the bit body.
Diamond Grit
19. ROLLER CONE
Alternative Names
Rock Bit
Drill Bits
Fixed
Cutter
Roller
Cone
Rock Bit
Tri-Cone™ Insert
Mill
Tooth
DiamondP D C
Natural
Diamond
Impregnated
DiamondT S P
Roller
Bearing
Journal
Bearing
Courtesy of
27. Tricone Bit - Roller Bearing
Drill Bits
Fixed
Cutter
Roller
Cone
Insert
Mill
Tooth
DiamondP D C
Natural
Diamond
Impregnated
DiamondT S P
Roller
Bearing
Journal
Bearing
Courtesy of
28. Roller Cone Bearing Systems
Main Bearings Retention Bearings Seals
Journal
Bearing
Bit
Roller
Bearing
Bit
29. Tricone Bit - Roller Bearing
Retention Bearing
Main Bearing
Courtesy of
Thrust Bearing
Pin Bearing
30. Tricone Bit - Journal Bearing
Drill Bits
Fixed
Cutter
Roller
Cone
Insert
Mill
Tooth
DiamondP D C
Natural
Diamond
Impregnated
DiamondT S P
Roller
Bearing
Journal
Bearing
Courtesy of
35. Drilling Mechanisms vs Bit Type
Scraping Mill Tooth
Chipping and Crushing Insert
Shearing PDCShearing PDC
Ploughing / Grinding Natural/Impregnated Diamond
Courtesy of
37. IADC Classification – Roller Cone
517G
Soft Formations w ith
Low Compressive
Strength and High
Drillability
1
Medium to Medium
Hard Formations w ith
High Compressive
Strength
2
Hard Semi-Abrasive
and Abrasive 3
STEEL
TOOTH
BITS
Cutting Structure Series Cutting Structure
Type (1 to 4)
1 refers to the softest
formation in a
particular Series and
4 refers to the
hardest formation
within the Series
Bearing/Gauge
Description
Standard
Roller
Bearing
1
Roller
Bearing Air
Cooled
2
Roller
Bearing
3
Features
Available
(Optional)
A - Air Application
B - Special Bearing Seal
C - Center Jet
D - Deviation Control
E - Extended Nozzles
G - Gauge/Body
Protection
Ref: SPE 23937 The IADC Roller Bit Classification System
8-1/2” EHP 51
and Abrasive
Formations
3
Soft Formations w ith
Low Compressive
Strength and High
Drillability
4
Soft to Medium
Formations w ith Low
Compressive Strength
5
Medium Hard
Formations w ith High
Compressive Strength
6
Hard Semi-Abrasive
and Abrasive
Formations
7
Extremely Hard and
Abrasive Formations 8
INSERT
BITS
within the Series
Gauge
Protected
3
Sealed
Roller
Bearing
4
Sealed
Roller Brg -
Gauge
Protected
5
Sealed
Friction
Bearing
6
Sealed
Frction Brg
Gauge
Protected
7
Protection
H - Horizontal Steering
Appl.
J - Jet Deflection
L - Lug Pads
M - Motor Application
S - Standard Steel Tooth
T - Two Cone Bit
W - Enhanced Cutting
Structure
X - Predominantly Chisel
Tooth Insert
Y - Conical Tooth Insert
Z - Other Shape Insert
38. IADC Classification – Fixed Cutter
12-1/4” DS66H
M432
Body Material Steel or Matrix.
Cutter Density PDC: 1 to 4, diamond bits: 6 to 8
(the lower the number, the lighter set the bit).
Cutter Size/Type For PDC cutter, 1 indicates >24 mm, 2
is between 14 and 24 mm, 3 is between 8 and 14 mm
and 4 is smaller than 8. For diamond bits, 1 represents
Ref: SPE 23940 Development of a New IADC Fixed Cutter Drill Bit Classification System
Profile The final digit indicates the general body style
and varies from 1 (flat profile) to 4 (long flanked
turbine style).
Fixed cutter IADC codes are intended only to provide a means for characterizing the general
physical appearance of fixed cutter drill bits. Unlike the IADC classification for roller bits, these
codes do not represent an application guideline.
and 4 is smaller than 8. For diamond bits, 1 represents
natural diamond, 2 is for TSP, 3 is a combination of
natural diamond and TSP and 4 is for impregnated.
44. IADC Bit Dull Grading CodeIADC Bit Dull Grading Code
45. IADC Bit Dull Grading Code
The International Association of Drilling Contractors has
developed a standard methodology for describing used
bits. This information is essential for detailed bit
performance analysis.
The methodology is composed of an 8 character codeThe methodology is composed of an 8 character code
that describes bit wear and the reason why the bit was
pulled.
INNER
ROWS
OUTER
ROWS
DULL
CHAR
LOCA-
TION
BRNG/
SEALS
GAUGE
1/16”
OTHER
CHAR
REASON
PULLED
Cutting Structure RemarksB G
46. IADC Bit Dull Grading Code
INNER
ROWS
OUTER
ROWS
DULL
CHAR
LOCA-
TION
BRNG/
SEALS
GAUGE
1/16”
OTHER
CHAR
REASON
PULLED
Cutting Structure RemarksB G
Fixed Cutter Bits
The cutting structure is graded from 0 to 8 depending on the proportion of
cutting structure lost (0 = Intact, 8 = 100% worn).
Roller Cone Bits
0 1 2 3 4 5 6 7 8
Inner Cutting
Structure (All Inner
Rows)
Outer Cutting
Structure (Gauge
Row Only)
0 1 2 3 4 5 6 7 8
Cone 2
Cone 3
Cone 1
Ref : Reed Hycalog PDC & Roller Cone Product Technology Reference Information
47. IADC Bit Dull Grading Code
INNER
ROWS
OUTER
ROWS
DULL
CHAR
LOCA-
TION
BRNG/
SEALS
GAUGE
1/16”
OTHER
CHAR
REASON
PULLED
Cutting Structure RemarksB G
BF - Bond Failure
BT - Broken Cutters
BU - Balled Up
CT - Chipped Cutters
ER - Erosion
*BC - Broken Cone
BF - Bond Failure
BT - Broken Teeth/Cutters
BU - Balled Up Bit
*CC - Cracked Cone
LN - Lost Nozzle
LT - Lost Teeth/Cutters
OC - Off-Center Wear
PB - Pinched Bit
PN - Plugged Nozzle/Flow Passage
Fixed Cutter Bits Roller Cone Bits
ER - Erosion
HC - Heat Checking
JD - Junk Damage
LN - Lost Nozzle
LT - Lost Cutter
NR - Not Rerunable
PN - Plugged Nozzle
RG - Rounded Gauge
RO - Ring Out
RR - Rerunable
SS - Self Sharpening Wear
TR - Tracking
WO - Washed Out Bit
WT - Worn Cutters
NO - No Dull Characteristics
*CC - Cracked Cone
*CD - Cone Dragged
CI - Cone Interference
CR - Cored
CT - Chipped Teeth/Cutters
ER - Erosion
FC - Flat Crested Wear
HC - Heat Checking
JD - Junk Damage
*LC - Lost Cone
PN - Plugged Nozzle/Flow Passage
RG - Rounded Gauge
RO - Ring Out
SD - Shirttail Damage
SS - Self Sharpening Wear
TR - Tracking
WO - Washed Out Bit
WT - Worn Teeth/Cutters
NO - No Dull Characteristic
* Show Cone under Location 4
Note that this is for the Primary dull characteristics.
Ref : Reed Hycalog PDC & Roller Cone Product Technology Reference Information
48. Fixed Cutter – Main Wear Characteristics
NO WEAR
(NO)
WORN
CUTTER
(WT)
BROKEN
CUTTER
(BT)
LOST
CUTTER
(LT)
EROSION
(ER)
POST OR STUD
CUTTERS
BOND
FAILURE
(BF)
NO WEAR
(NO)
WORN
CUTTER
(WT)
BROKEN
CUTTER
(BT)
LOST
CUTTER
(LT)
CYLINDER
CUTTERS BOND
FAILURE
(BF)
Courtesy of
49. Dull Characteristics – Some Examples
BF - Bond Failure
BT - Broken Cutters
BU - Balled Up
CT - Chipped Cutters
ER - Erosion
HC - Heat Checking
JD - Junk Damage
LN - Lost Nozzle
LT - Lost Cutter
Fixed Cutter Bits
LT - Lost Cutter
NR - Not Rerunable
PN - Plugged Nozzle
RG - Rounded Gauge
RO - Ring Out
RR - Rerunable
SS - Self Sharpening Wear
TR - Tracking
WO - Washed Out Bit
WT - Worn Cutters
NO - No Dull Characteristics
BU - Balled Up
Ref : Reed Hycalog PDC & Roller Cone Product Technology Reference Information
50. *BC - Broken Cone
BF - Bone Failure
BT - Broken Teeth/Cutters
BU - Balled Up Bit
*CC - Cracked Cone
*CD - Cone Dragged
CI - Cone Interference
LN - Lost Nozzle
LT - Lost Teeth/Cutters
OC - Off-Center Wear
PB - Pinched Bit
PN - Plugged Nozzle/Flow Passage
RG - Rounded Gauge
RO - Ring Out
Roller Cone Bits
Dull Characteristics – Some Examples
CR - Cored
CT - Chipped Teeth/Cutters
ER - Erosion
FC - Flat Crested Wear
HC - Heat Checking
JD - Junk Damage
*LC - Lost Cone
SD - Shirttail Damage
SS - Self Sharpening Wear
TR - Tracking
WO - Washed Out Bit
WT - Worn Teeth/Cutters
NO - No Dull Characteristic
* Show Cone under Location 4
BU – Balled Up Bit
(primary)
CD – Cone Dragged
(secondary)Ref : IADC Drilling Manual – Eleventh Edition
51. Dull Characteristics – Some Examples
BF - Bond Failure
BT - Broken Cutters
BU - Balled Up
CT - Chipped Cutters
ER - Erosion
HC - Heat Checking
JD - Junk Damage
LN - Lost Nozzle
LT - Lost Cutter
Fixed Cutter Bits
LT - Lost Cutter
NR - Not Rerunable
PN - Plugged Nozzle
RG - Rounded Gauge
RO - Ring Out
RR - Rerunable
SS - Self Sharpening Wear
TR - Tracking
WO - Washed Out Bit
WT - Worn Cutters
NO - No Dull Characteristics CT – Chipped Cutter
Ref : Reed Hycalog PDC & Roller Cone Product Technology Reference Information
52. Dull Characteristics – Some Examples
BF - Bond Failure
BT - Broken Cutters
BU - Balled Up
CT - Chipped Cutters
ER - Erosion
HC - Heat Checking
JD - Junk Damage
LN - Lost Nozzle
LT - Lost Cutter
Fixed Cutter Bits
LT - Lost Cutter
NR - Not Rerunable
PN - Plugged Nozzle
RG - Rounded Gauge
RO - Ring Out
RR - Rerunable
SS - Self Sharpening Wear
TR - Tracking
WO - Washed Out Bit
WT - Worn Cutters
NO - No Dull Characteristics
LT – Lost Cutter
Ref : Reed Hycalog PDC & Roller Cone Product Technology Reference Information
53. *BC - Broken Cone
BF - Bone Failure
BT - Broken Teeth/Cutters
BU - Balled Up Bit
*CC - Cracked Cone
*CD - Cone Dragged
CI - Cone Interference
LN - Lost Nozzle
LT - Lost Teeth/Cutters
OC - Off-Center Wear
PB - Pinched Bit
PN - Plugged Nozzle/Flow Passage
RG - Rounded Gauge
RO - Ring Out
Roller Cone Bits
Dull Characteristics – Some Examples
CR - Cored
CT - Chipped Teeth/Cutters
ER - Erosion
FC - Flat Crested Wear
HC - Heat Checking
JD - Junk Damage
*LC - Lost Cone
SD - Shirttail Damage
SS - Self Sharpening Wear
TR - Tracking
WO - Washed Out Bit
WT - Worn Teeth/Cutters
NO - No Dull Characteristic
* Show Cone under Location 4
BT – Broken Teeth/Cutters
Ref : IADC Drilling Manual – Eleventh Edition
54. Dull Characteristics – Some Examples
BF - Bond Failure
BT - Broken Cutters
BU - Balled Up
CT - Chipped Cutters
ER - Erosion
HC - Heat Checking
JD - Junk Damage
LN - Lost Nozzle
LT - Lost Cutter
Fixed Cutter Bits
LT - Lost Cutter
NR - Not Rerunable
PN - Plugged Nozzle
RG - Rounded Gauge
RO - Ring Out
RR - Rerunable
SS - Self Sharpening Wear
TR - Tracking
WO - Washed Out Bit
WT - Worn Cutters
NO - No Dull Characteristics
RO – Ring Out
Ref : Reed Hycalog PDC & Roller Cone Product Technology Reference Information
55. *BC - Broken Cone
BF - Bone Failure
BT - Broken Teeth/Cutters
BU - Balled Up Bit
*CC - Cracked Cone
*CD - Cone Dragged
CI - Cone Interference
LN - Lost Nozzle
LT - Lost Teeth/Cutters
OC - Off-Center Wear
PB - Pinched Bit
PN - Plugged Nozzle/Flow Passage
RG - Rounded Gauge
RO - Ring Out
Roller Cone Bits
Dull Characteristics – Some Examples
CR - Cored
CT - Chipped Teeth/Cutters
ER - Erosion
FC - Flat Crested Wear
HC - Heat Checking
JD - Junk Damage
*LC - Lost Cone
SD - Shirttail Damage
SS - Self Sharpening Wear
TR - Tracking
WO - Washed Out Bit
WT - Worn Teeth/Cutters
NO - No Dull Characteristic
* Show Cone under Location 4
JD – Junk Damage
Ref : IADC Drilling Manual – Eleventh Edition
56. Dull Characteristics – Some Examples
BF - Bond Failure
BT - Broken Cutters
BU - Balled Up
CT - Chipped Cutters
ER - Erosion
HC - Heat Checking
JD - Junk Damage
LN - Lost Nozzle
LT - Lost Cutter
Fixed Cutter Bits
LT - Lost Cutter
NR - Not Rerunable
PN - Plugged Nozzle
RG - Rounded Gauge
RO - Ring Out
RR - Rerunable
SS - Self Sharpening Wear
TR - Tracking
WO - Washed Out Bit
WT - Worn Cutters
NO - No Dull Characteristics
WT – Worn Cutters
Ref : Reed Hycalog PDC & Roller Cone Product Technology Reference Information
57. *BC - Broken Cone
BF - Bone Failure
BT - Broken Teeth/Cutters
BU - Balled Up Bit
*CC - Cracked Cone
*CD - Cone Dragged
CI - Cone Interference
LN - Lost Nozzle
LT - Lost Teeth/Cutters
OC - Off-Center Wear
PB - Pinched Bit
PN - Plugged Nozzle/Flow Passage
RG - Rounded Gauge
RO - Ring Out
Roller Cone Bits
Dull Characteristics – Some Examples
CR - Cored
CT - Chipped Teeth/Cutters
ER - Erosion
FC - Flat Crested Wear
HC - Heat Checking
JD - Junk Damage
*LC - Lost Cone
SD - Shirttail Damage
SS - Self Sharpening Wear
TR - Tracking
WO - Washed Out Bit
WT - Worn Teeth/Cutters
NO - No Dull Characteristic
* Show Cone under Location 4
SD - Shirttail Damage
Ref : IADC Drilling Manual – Eleventh Edition
58. *BC - Broken Cone
BF - Bone Failure
BT - Broken Teeth/Cutters
BU - Balled Up Bit
*CC - Cracked Cone
*CD - Cone Dragged
CI - Cone Interference
LN - Lost Nozzle
LT - Lost Teeth/Cutters
OC - Off-Center Wear
PB - Pinched Bit
PN - Plugged Nozzle/Flow Passage
RG - Rounded Gauge
RO - Ring Out
Roller Cone Bits
Dull Characteristics – Some Examples
CR - Cored
CT - Chipped Teeth/Cutters
ER - Erosion
FC - Flat Crested Wear
HC - Heat Checking
JD - Junk Damage
*LC - Lost Cone
SD - Shirttail Damage
SS - Self Sharpening Wear
TR - Tracking
WO - Washed Out Bit
WT - Worn Teeth/Cutters
NO - No Dull Characteristic
* Show Cone under Location 4
TR - Tracking
59. *BC - Broken Cone
BF - Bone Failure
BT - Broken Teeth/Cutters
BU - Balled Up Bit
*CC - Cracked Cone
*CD - Cone Dragged
CI - Cone Interference
LN - Lost Nozzle
LT - Lost Teeth/Cutters
OC - Off-Center Wear
PB - Pinched Bit
PN - Plugged Nozzle/Flow Passage
RG - Rounded Gauge
RO - Ring Out
Roller Cone Bits
Dull Characteristics – Some Examples
CR - Cored
CT - Chipped Teeth/Cutters
ER - Erosion
FC - Flat Crested Wear
HC - Heat Checking
JD - Junk Damage
*LC - Lost Cone
SD - Shirttail Damage
SS - Self Sharpening Wear
TR - Tracking
WO - Washed Out Bit
WT - Worn Teeth/Cutters
NO - No Dull Characteristic
* Show Cone under Location 4
SS – Self Sharpening Wear
Ref : IADC Drilling Manual – Eleventh Edition
60. *BC - Broken Cone
BF - Bone Failure
BT - Broken Teeth/Cutters
BU - Balled Up Bit
*CC - Cracked Cone
*CD - Cone Dragged
CI - Cone Interference
LN - Lost Nozzle
LT - Lost Teeth/Cutters
OC - Off-Center Wear
PB - Pinched Bit
PN - Plugged Nozzle/Flow Passage
RG - Rounded Gauge
RO - Ring Out
Roller Cone Bits
Dull Characteristics – Some Examples
CR - Cored
CT - Chipped Teeth/Cutters
ER - Erosion
FC - Flat Crested Wear
HC - Heat Checking
JD - Junk Damage
*LC - Lost Cone
SD - Shirttail Damage
SS - Self Sharpening Wear
TR - Tracking
WO - Washed Out Bit
WT - Worn Teeth/Cutters
NO - No Dull Characteristic
* Show Cone under Location 4
ER – Erosion
Ref : IADC Drilling Manual – Eleventh Edition
61. IADC Bit Dull Grading Code
INNER
ROWS
OUTER
ROWS
DULL
CHAR
LOCA-
TION
BRNG/
SEALS
GAUGE
1/16”
OTHER
CHAR
REASON
PULLED
Cutting Structure RemarksB G
Fixed Cutter Bits Roller Cone Bits
N - Nose Row
M - Middle Row
G - Gauge Row
Cone 1, 2 or 3
C - Cone
N - Nose
T - Taper
S - Shoulder
G - Gauge
G - Gauge Row
A - All Rows
Ref : Reed Hycalog PDC & Roller Cone Product Technology Reference Information
62. IADC Bit Dull Grading Code
INNER
ROWS
OUTER
ROWS
DULL
CHAR
LOCA-
TION
BRNG/
SEALS
GAUGE
1/16”
OTHER
CHAR
REASON
PULLED
Cutting Structure RemarksB G
Fixed Cutter Bits Roller Cone Bits
This box is for roller cone
bits. Fixed cutter bits will
always be designated by "X".
A linear scale estimating
bearing life used. (0 -No life
Non Sealed Bearings
bearing life used. (0 -No life
used, 8 - All life used, i.e., no
bearing life remaining.)
Sealed Bearings
E - Seals Effective
F - Seals Failed
N - Not Able to Grade
Ref : Reed Hycalog PDC & Roller Cone Product Technology Reference Information
63. IADC Bit Dull Grading Code
INNER
ROWS
OUTER
ROWS
DULL
CHAR
LOCA-
TION
BRNG/
SEALS
GAUGE
1/16”
OTHER
CHAR
REASON
PULLED
Cutting Structure RemarksB G
For all Bits
The letter “I” is used to designate bits that are in gauge.
If the bit is under gauge, the amount is recorded to the nearest 1/16” ofIf the bit is under gauge, the amount is recorded to the nearest 1/16” of
an inch. For example, if the bit is 1/8” under gauge, this is reported as
2/16 or often only as 2.
Ref : Reed Hycalog PDC & Roller Cone Product Technology Reference Information
64. IADC Bit Dull Grading Code
INNER
ROWS
OUTER
ROWS
DULL
CHAR
LOCA-
TION
BRNG/
SEALS
GAUGE
1/16”
OTHER
CHAR
REASON
PULLED
Cutting Structure RemarksB G
BF - Bond Failure
BT - Broken Cutters
BU - Balled Up
CT - Chipped Cutters
ER - Erosion
*BC - Broken Cone
BF - Bone Failure
BT - Broken Teeth/Cutters
BU - Balled Up Bit
LN - Lost Nozzle
LT - Lost Teeth/Cutters
OC - Off-Center Wear
PB - Pinched Bit
Fixed Cutter Bits Roller Cone Bits
This is for the Secondary dull char. and it uses the same codes as for the Primary dull char.
ER - Erosion
HC - Heat Checking
JD - Junk Damage
LN - Lost Nozzle
LT - Lost Cutter
NR - Not Rerunable
PN - Plugged Nozzle
RG - Rounded Gauge
RO - Ring Out
RR - Rerunable
SS - Self Sharpening Wear
TR - Tracking
WO - Washed Out Bit
WT - Worn Cutters
NO - No Dull Characteristics
BU - Balled Up Bit
*CC - Cracked Cone
*CD - Cone Dragged
CI - Cone Interference
CR - Cored
CT - Chipped Teeth/Cutters
ER - Erosion
FC - Flat Crested Wear
HC - Heat Checking
JD - Junk Damage
*LC - Lost Cone
PB - Pinched Bit
PN - Plugged Nozzle/Flow Passage
RG - Rounded Gauge
RO - Ring Out
SD - Shirttail Damage
SS - Self Sharpening Wear
TR - Tracking
WO - Washed Out Bit
WT - Worn Teeth/Cutters
NO - No Dull Characteristic
* Show Cone under Location 4
Ref : Reed Hycalog PDC & Roller Cone Product Technology Reference Information
65. IADC Bit Dull Grading Code
INNER
ROWS
OUTER
ROWS
DULL
CHAR
LOCA-
TION
BRNG/
SEALS
GAUGE
1/16”
OTHER
CHAR
REASON
PULLED
Cutting Structure RemarksB G
For All Bits
BHA - Change Bottom Hole Assembly
DMF - Down hole Motor Failure
DSF - Drill String Failure
HP - Hole Problems
HR - Hours
PP - Pump PressureDSF - Drill String Failure
DST - Drill Stem Test
DTF - Down hole Tool Failure
RIG - Rig Repair
CM - Condition Mud
CP - Core Point
DP - Drill Plug
FM - Formation Change
PP - Pump Pressure
PR - Penetration Rate
TD - Total Depth/Casing Point
TQ - Torque
TW - Twist Off
WC - Weather Conditions
WO - Washout -DrillString
Ref : Reed Hycalog PDC & Roller Cone Product Technology Reference Information
66. Key to Dull Bit Grading: Grade a Lot of Dulls !
Photo courtesy of
67. BIT RECORD
Well :
BIT RECORD
Date :
Bit Data
BHA Bit Size Bit type Serial IADC Nozzles Depth Depth Drilling ROP Bit krevs WOB Rot Flow Press Inc Mud Total Total Total Dull
No. No. (inch) & maker Number Code (1/32") IN (m)OUT (m) Time (m/hr)(drilling)(Klbs) (RPM) (GPM) (psi) (deg) SG mtr hrs krevs I O D L B G O R
Run Data Bit life Grading
To be filled up at wellsite
No. No. (inch) & maker Number Code (1/32") IN (m)OUT (m) Time (m/hr)(drilling)(Klbs) (RPM) (GPM) (psi) (deg) SG mtr hrs krevs I O D L B G O R
1 1 16 T11C L15264 115
3 x 18, 1
x 16
15 420 18.04 22.45 151.50 10-25 120 820 1450 0 1.07 405 18.04 152 0 1 WT A E I NO TD
2 2RR 12 1/4 DSX113 204556 PDC 8 x 13 420 422 0.50 4.00 1.22 2-10 60 680 1000 0.00 1.15 2 0.50 1 0 1 WT S X I CTBHA
4 2RR2 12 1/4 DSX113 204556 PDC 8 x 13 1408 1714 16.54 18.50 119.09 25-35 120 820 1900 1.00 1.19 308 17.04 120 1 3 WT A X I PN TD
•BHA nb does not always = bit nb
•Drilling time = bit time on bottom (←←←← Mud loggers)
•Krevs = 1000 bit revolution (←←←← Mud loggers)
69. Bit performance
Main function: ROP and longevity
Drilling fluid is circulated through passageways in the bit
to remove cuttings and apply hydraulic power to improve
ROPROP
ROP is a function of WOB, RPM, mud properties and
hydraulic efficiency
70. Chip Formation
Tooth load overcomes rock compressive strength,
generates crater
Scraping helps to remove chips from craters.
CutterCutterCutterCutter
FormationFormation
Borehole pressure causes
chip hold down effect
Courtesy of
72. Chip Removal
Removal of chips is required to
allow for new chip formation
CutterCutter
Hydraulics help to remove chips
FormationFormation
CutterCutter
72
Courtesy of
73. CHIP CREATION CHIP REMOVAL
WOB (Weight on Bit) ResponseROP
WEIGHT on BIT
0
0
Courtesy of
84. Bit Selection - PDC
Advantages
Very Fast ROP
Long Life Potential
ConsiderationsConsiderations
Impact Damage
Abrasiveness
Stability
Courtesy of
85. Bit Selection – Tooth Bit
Advantages
Fast ROP
Good Stability
Economic
Considerations
Tooth Wear Rate
Bearing Life
Courtesy of
86. Bit Selection – Insert Bits
Advantages
Cutting Structure Durability
Range of Formations
Interbed Tolerance
Steerability and StabilitySteerability and Stability
Considerations
Slower ROP
Bearing Life
Courtesy of
87. Bit Selection – Natural & Impreg
Diamond Bits
Advantages
Very Durable
Hard Rock Capability
Low Junk-in-Hole Risk
Considerations
Slower ROP
RPM Sensitivity
High Cost Applications
Courtesy of
88. Gauging Procedures for 3-Cone Bits
Smith 3-Cone Bits are designed to have minimum gauge contact. By use of suitable gauge cutting structure design and materials, the “minimum gauge”
configuration improves penetration rates whilst maintaining full size hole. Only the cutting elements (teeth or inserts) contact, while the cone shell steel is
held away from the hole wall. This means that unless the gauge cutting elements are “lined up” with the gauge contact point on any gauge ring, the bit will
measure slightly smaller than it actually is. This is particularly true of aggressive insert bits which have a lighter set gauge and large offset.
Gauging a 3-cone bit, either sharp or dull, requires some care and should be carried out as follows:
1. Only use a calibrated 3-cone gauge ring measuring the nominal bit size.
2. Turn the bit on its pin and rotate all the cones to their “maximum gauge point”
so that a gauge tooth or insert lines up at this point.
3. Place the gauge ring over the bit at the maximum gauge points.
4. Pull the ring gauge tight against the gauge elements on two cones.
5. Measure any gap at the free cone. This is not the the correct value for gauge wear.
6. To calculate the actual gauge wear you must multiply the gap distance by 2/3 (‘two thirds’).
For example: if measured gap is 3/16” then multiply by 2/3 giving 2/16” under-gauge.
7. Record the bit as being either in gauge or the amount under-gauge. Although IADC say to use
Gap
7. Record the bit as being either in gauge or the amount under-gauge. Although IADC say to use
an “I” for in gauge, we recommend using a 0 (zero) to avoid the confusion between an I and a 1.
Maximum gauge point
API Sizes for New Bits API Roller Cone Bit Tolerances
Bit Size Actual Size Bit Size Tolerance
Min. Max.
26” 26.000” 26.094” 3-3/8” to 13-3/4” +1/32”, -0”
23” 23.000” 23.094” 14” to 17.5” +1/16”, -0”
17.5” 17.500” 17.562” 17-5/8” and larger +3/32”, -0”
16” 16.000” 16.062”
12.25” 12.250” 12.281”
8.5” 8.500” 8.531”
6” 6.000” 6.031”
Important points to note:
A 3-Cone bit can be built larger than nominal size because of the plus
tolerance allowed, but a new bit can never be undergauge (due to the
required cutting structure clearances).
To gauge a new bit you must use a 3-cone ring gauge that measures the
nominal bit size plus API tolerance (see table). You CANNOT use a PDC ring
gauge to gauge a 3-cone bit and vice versa.
On those Smith 3-Cone bits that feature the ‘OD’ diamond enhanced heel row
inserts (e.g. MSDGHOD), these bits are designed and built so that these
inserts actively cut gauge at the maximum gauge point.
Therefore, if the gauge cutting elements are worn and undergauge, then re-
gauge the bit on the heel row inserts.
The manufacturing locations of Smith 3-Cone bits are all ISO Certified (ISO
9001).
89. Gauging Procedures for PDC Bits
Gauging a PDC bit, either sharp or dull, requires some care and should be carried
out as follows:
1. Only use a calibrated PDC “No-Go” gauge ring.
2. Turn the bit on its pin.
3. Place the No-Go gauge ring over the bit - it should stop at the gauge skimmer/gauge
pads
4. If the No-Go PDC gauge ring will not pass over the entire gauge area of the bit then the
bit is in gauge.
5. If the No-Go gauge ring will pass then place the ring gauge at the gauge pads and pull
hard to one side.
6. Measure the gap in 1/16” at the point opposite the point of contact between ring gauge
and gauge pad.
7. Record the bit as being either in gauge or the amount under-gauge. Although IADC say to
PDC
Bit
No-Go gauge ring pulled
hard against gauge pad.
No-Go ring gauge
7. Record the bit as being either in gauge or the amount under-gauge. Although IADC say to
use an “I” for in gauge, we recommend using a 0 (zero) to avoid the confusion between an I
and a 1.
API PDC Bit Tolerances
Bit Size Tolerance
6 3/4” and smaller -0.015” to + 0”
6 25/32” and including 9” -0.020” to + 0”
9 1/32” and including 13 3/4” -0.030” to + 0”
13 25/32” and including 17 1/2” -0.045” to + 0”
17 17/32” and larger -0.063 to + 0”
Important points to note:
A PDC bit can be built slightly smaller than nominal size because of
the negative tolerance allowed, but a new bit should never be
overgauge.
To gauge a bit you must use a PDC “No-Go” ring gauge that measures
the nominal bit size minus API tolerance (see table). You CANNOT
use a 3-cone ring gauge to gauge a PDC bit and vice versa.
The manufacturing locations of Smith PDC bits are all ISO Certified
(ISO 9001).
Measure the gap here in 1/16” and record
91. Drill Out Mode
During drill out, drift
& drill bits rotate
around the drift axis
The drift axis is at
the geometric
center of the reamer
92. When drilling ahead, drift &
drill bits rotate around the
drill axis
The drill axis is defined as the
center of the pilot section,
Drilling Ahead
center of the pilot section,
and is also the center of the
bit connection / shank
93. Quad-D Nomenclature
12 1/4” x 14 3/4” QDS41PX
Drift Diameter
Enhanced Gage
Protection
Drill Diameter
Number Range Cutter Size
02-07 6mm
08-27 9mm
28X 11mm
29-59 13mm
60-81 16mm
82-97 19mm
98X 22mm
99X 25mm
QDS: QUAD-D Steel Bit
QDM: QUAD-D Matrix Bit
QDG: QUAD-D Reamer
Protection
(standard on all steel bits)