3. 1
About Varel International
āWe will deliver ever-increasing
value to our customers and other
stakeholders by exceeding industry
standards for performance, service
and innovation.ā
Founded in 1947, Varel International is the worldās
largest independent supplier in the global oil & gas
drillbitmarket.Vareloffersacomprehensiveproduct
line of roller cone and fixed cutter (PDC) drill bits that
have evolved and improved through patented drill
bit technologies and emerging drilling technologies.
Varel aligns its engineering and manufacturing
capabilities to provide customers with high-quality
products that deliver reliability and optimum
performance.
ā¢ High-quality manufacturing
ā¢ Product and process innovation
ā¢ Delivering integrity in all of our relationships
ā¢ Responsibility towards health, safety, and the
environment
ā¢ Creating customers for life
Scan our updated catalog for our latest products,
features and premium options. Then contact the
Varel sales office near you to discuss innovative
and cost-effective solutions for your next
drilling project.
4. www.varelintl.com
Varel Roller Cone Drill Bit Technology
Varel Drill Bit Technology
Varel roller cone bits are designed and manufactured
to provide high levels of performance and reliability.
The product lines are the result of years of industry
experience and thousands of hours of field tests in
the most demanding applications. Every detail of
the design and manufacturing process results in
a product built to meet or exceed the requirements
of our customers.
Using electronic logs and our proprietary GeoScienceā¢
program, Varel evaluates characteristics of rock
formations. This program enables Varel to determine
rock type, compressive strength, abrasivity and shale
reactivity.
Varel has developed proprietary algorithms for cutting
structure and bearing designs to ensure each product
design consistently performs in a variety of applications.
Algorithms are used to design cutting structures to
achieve desired rates of penetration, resist tracking and
combat off-center operation. Bearings and seal systems
are designed using models that assure adequate load
capacity and seal wear life in high rotary speed and/or
applications with high solids in the circulation system.
Materials used in the construction of roller cone
bits are sourced from leading suppliers who
have the ability to produce consistently to high
standards and meet firm delivery schedules. Varel
operates using the philosophy of partnering with
suppliers in order to build long-term relationships
that provide quality materials and components
which result in increased value to our customers.
Our manufacturing processes are designed to be
robust and repeatable. These processes are constantly
monitored and continuously reviewed to provide
the drilling industry with ever-increasing value.
All Varel roller cone design and manufacturing
facilities are managed through quality programs
meeting the requirements of both ISO 9001:2008
and API Q1. These quality programs are designed
with an emphasis on consistency, quality and
continuous improvement in all aspects of our business.
Varel products are tailored for specific applications
by customizing from a rich set of optional features.
These features deliver increased wear protection in
demanding drilling applications. This results in longer
bit life and reduced drilling costs for our customers.
All Varel products are delivered with superior service.
No matter where you are in the world, Varel sales and
technical service personnel are experts on local drilling
conditions and problem avoidance, and can assist
you with proper drill bit and operating parameters
selection. From well proposals to onsite monitoring,
Varel is available to help you plan and drill your well
successfully.
Varel maintains an industry-leading bit record database
that is utilized to monitor bit performance and to ensure
appropriate bit selection in the well planning process.
Varel Roller Cone Availability
Product Name Size Range TCI
Steel
Tooth
Air
High Energy 7 1/2 - 13 3/4 ā¢
Compass 3 3/4 - 7 3/8 ā¢
A-Force 6 1/8 - 12 1/4 ā¢ ā¢
Challenger
Steel Tooth
Large Performance
Jumbo
3 1/2 - 13 3/4
14 3/4 - 18 1/2
20 +
ā¢
ā¢
ā¢
ā¢
ā¢
Steel Tooth, Open
Bearing
2 7/8 - 44 ā¢
7-1-0035,
7-1-0035.1
5. 3
Advanced Technologies
Finite Element Analysis (FEA) of an insert hole
GeoScience builds a virtual model of the geology
of the well sections to be drilled.
Advanced Technologies for Design Analysis
Varel engineers utilize Computational Fluid Dynamics (CFD)
to simulate fluid flow around roller cone bits and evaluate
design hydraulics prior to field tests. CFD analysis allows
nozzle orientations to be optimized to eliminate fluid
stagnation zones, and to ensure cone cleaning and hole
cleaning are efficient and enable maximum penetration rates
to be achieved.
Finite Element Analysis (FEA) is employed to analyze new
roller cone bit designs in the early stages of the process to
ensure product reliability under a wide variety of operating
conditions. The insert hole and bearing geometries are
analyzed through FEA and designed to withstand the high
loads encountered in severe drilling applications.
GeoScienceTM
is Varelās proprietary well log, lithology, and rock
property analysis software. Varel has developed proprietary
algorithmic analytical capabilities to create a leading tool
for drill bit applications analysis. Using customer-supplied
mud logs, drilling logs, and electric log data, Varel builds
a virtual model of the well sections to be drilled. Historic
bit performance is evaluated using a specific energy method
that allows for correlation across different bore diameters.
The GeoScience technology and method leads to a far better
understanding of the drilling challenge to be met and assists
in identifying the type of drill bit for the application.
6. āŗ High temperature,
high lubricity bearing
grease
www.varelintl.com
āŗ Improved shirttail
hardfacing
āŗ Patented HET
carbide inserts
āŗ High capacity
journal bearing
āŗ Optional diamond
enhancement features
available
āŗ V-Jetā¢
hydraulics
package
āŗ Patented conical
seal gland
āŗ Patented
heat shield
High Energy Series
Reliability Improvement
High Energy Series
Previous Technology100%
80%
60%
40%
20%
0%
%SealEffective
21% Increase
āŗ Advanced
Compensation
System
Our product development team started with a higher load
capacity bearing geared toward higher weight and motor
applications. Bearing reliability was also enhanced through
closely controlled assembly tolerances.
7. 5
Proven technology meets enhanced features
The new High Energy product line consists
of our 7Ā½ to 13Ā¾ sealed journal bearings
with tungsten carbide cutting structures.
The bits are built with time-proven O-ring
seal technology, but with new features
that greatly enhance the effective life of
the seals. First, a patented conical seal
gland design has been employed. This
new geometry positions the seal in such
a way that it can better handle pressure
fluctuations and still maintain a preferred dynamic sealing location
and interface. The new seal gland is further complemented by an
industry exclusive heat shield deployed between the seal and the
inner bearing. This shield provides life extending thermal insulation
to the seal from heat generated in the bearing. The result is a lower
operating temperature for the seal that also extends seal life.
An improved seal and bearing system
The High Energy Series includes
innovations that increase bearing
life and seal protection. Engineers
developed a bearing system designed
to support higher loads on the
bearing surface, which resulted
in a more robust and more tightly
toleranced journal bearing. In
addition, a new anti-shale packing configuration is incorporated,
improving cuttings diversion away from the mud side of the
seal gland.
Self-draining reservoir
We have incorporated a larger
dome-vented grease reservoir into
the bearing system that is capable
of delivering bearing lubrication
over longer, higher load and higher
RPM runs. This new reservoir
provides a 13 percent increase
in capacity over previous designs
and is configured to be āself-drainingā to avoid cuttings buildup
adjacent to the reservoir. This feature improves the reliability
of reservoir performance when a High Energy Series bit is rerun.
Increased wear resistance
To ensure greater durability, we have
incorporated a new shirttail hard
metal formulation that significantly
increases wear resistance in this
critical area of the bit. Upgraded
shirttail enhancements including
leading edge shirttail inserts,
stabilization inserts and diamond
enhanced shirttail protection are available.
High Energy Tumbled (HET) cutting performance
This proprietary process for improving the attributes of tungsten
carbide inserts (TCI) overcomes the traditional trade-off between
wear resistance and fracture toughness of tungsten carbide
components and actually makes TCI components both harder and
tougher. The HET process constitutes one more quality assurance
step in the manufacturing of tungsten carbide inserts. We
manufacture the inserts used in our products and control all of the
HET processing and inspection of inserts.
As a leading manufacturer and global supplier to the drilling
industry, we are proud to introduce the next generation
in drill bit performance ā the Varel High Energy Series.
This innovative series ushers in a new line of roller cone bits capable of increasing drilling performance by
effectively utilizing higher energy inputs in the form of increased rotary speed, increased weight on bit, or both.
To create the High Energy Series, our engineers used an integrated systems approach. At every point in the
development process, each element was refined and enhanced to add to the durability and drilling rate of
these bits. As a result, our High Energy Series bits are able to withstand applications where the combination
of bit weight and rotary speed is at the high end of the spectrum, and by doing so deliver better performance
in critical applications.
Overview
8. www.varelintl.com
Compass Series
āŗ Custom gage row
designs available
āŗ Patented HET
carbide inserts
āŗ Enhanced shirttail
protection
āŗ Patented conical
seal gland
āŗ Patented heat shield
āŗ High temperature, high
lubricity bearing grease
āŗ Improved hardfacing
near reservoir for wear
resistance in directional
applications
āŗ Highly responsive
cutting structure design
Compass series bits have proved highly effective across the spectrum of slimhole operations.
Available in sizes ranging from 3-3/4ā to 7-3/8,ā Compass tungsten carbide insert bits meet the
extreme demands of slimhole applications.
In one slimhole application for a major operator in Western Canada, a 158.7mm Compass bit
was challenged to increase meters drilled while maintaining an acceptable rate of penetration
(ROP). This application requires the bit to pass through increasingly hard formations including
the abrasive, sharp sands of the Cadomin/Nikanassin formations. Varel supplied the operator
with the Compass CM44DMRS bit, equipped with a diamond enhanced back row, leading edge
shirttail inserts and stabilization inserts. The bit drilled 180 meters, down to 1985 meters
depth. This performance netted a 19.4 percent improvement in meters drilled when compared to
the closest competitor offset and a 31 percent improvement in ROP.
Performance Chart
140
180
200
160
120
80
100
60
40
20
0
6
8
9
7
5
3
4
2
1
0
VarelCompassBit
CompetitorRun1CompetitorRun2CompetitorRun3CompetitorRun4CompetitorRun5
Meters
ROP
9. Cutting structures designed for high ROP
and steering response.
Heat shield ring with a conical seal gland helps
prevent thermal degradation of the seal.
High capacity grease reservoir improves
lubrication within the bearing.
View of the internal bearing structure. The
advanced bearing metallurgy included in this
series provides for a stronger, more stable
bearing surface.
7
Overview
Compassā¢
Series Slimhole Bits
Reduced size casing programs, re-entries, multi-laterals, and coiled tubing
drilling all require steerability, reliability and efficient rate of penetration.
Engineered with application specific technology, Compass Series Slimhole Bits
provide excellent steerability and high rates of penetration even when weight
on bit is limited. The bearing provides long, reliable performance in deep hole,
long reach sections where increased RPMs in motor applications are commonly
encountered.
Series Features and Benefits
āŗ Advanced cutting structure and gage
Compass series bits are made with highly responsive cutting structures designed for
increased drilling speed and unsurpassed steerability. The dense shirttail protection
included in the gage of slimhole bits provides superior durability in directional
applications.
Custom gage row designs are available to optimize the bit for specific drilling
applications. Semi-round top (SRT) inserts or flat topped diamond inserts are applied
to harden the gage where required.
āŗ Patented conical seal gland
Constructed to resist cuttings packing in the seal area, the unique geometry of the seal
gland provides significant benefits during high angle drilling.
āŗ Patented heat shield
Deployed between the seal and inner bearing, this shield provides life extending thermal
insulation to the seal from heat generated in the bearing.
āŗ High temperature, high lubricity bearing grease
Advanced synthetic grease allows for improved lubrication and greater reliability in high
speed motor applications.
āŗ High capacity reservoir
The redesigned reservoir is capable of delivering bearing lubrication over longer and
higher RPM runs.
āŗ Patented High Energy Tumbledā¢
(HET) cutting inserts
Cutting elements undergo the HET process to alter the surface attributes, resulting in
inserts that are more abrasion and impact resistant.
āŗ Advanced bearing metallurgy
Compass bits are equipped with a silver plated journal bushing, silver plated floating
thrust washer, pilot pin and enhanced bearing hardmetal alloy for increased durability
and reliability.
10. www.varelintl.com
A-Force Series
āŗ Back row gage protection
āŗ Advanced cutting
structure
āŗ Shirttail protection
āŗ Advanced compensation
system
āŗ Replaceable steel
jet nozzles with
nail retention
āŗ HETā¢ conical inserts
Heat shield ring with a conical
seal gland helps prevent thermal
degradation of the seal
Cutaway view of the new
high load bearing system
All new head forgings maximize
leg strength while increasing
clearance area for cuttings removal
Diamond enhancement upgrades are available for
both the shirttail and primary cutting structure.
These upgrades can be especially beneficial in
abrasive air, mist and foam applications.
āŗ Hardfacing near reservoir
for wear resistance in
lateral sections and
building angle
11. Patented High Energy Tumbled Inserts
High capacity grease reservoir system improves
grease distribution within the bearing
9
Overview
A-Forceā¢
In the quest for higher rates of penetration, operators are increasingly
turning to underbalanced drilling that utilizes air, water mist and
foam fluid systems. These complex systems require specialized bits to
maximize efficiency and performance.
Varel has been engineering roller cone bits for air and underbalanced
drilling applications since 1994. Now Varel introduces the A-Force
series of sealed journal bearing jet air bits to meet the needs of these
applications and provide superior results.
Newly Engineered Bearing and Seal System
Included on all A-Force series bits is an updated sealed journal bearing
system designed with new technology that improves management of
bearing heat and better accommodates high drilling loads.
āŗ Advanced cutting structure and gage
A-Force series bits use cutting structures designed for increased drilling speed
in underbalanced drilling applications. The dense shirttail protection included
in the gage provides superior durability in directional applications.
āŗ Patented conical seal gland
Constructed to resist cuttings packing in the seal area, the unique geometry of
the seal gland provides significant benefits during high angle drilling.
āŗ Patented heat shield
Deployed between the seal and inner bearing, this shield provides life extending
thermal insulation to the seal from heat generated in the bearing.
āŗ High temperature, high lubricity bearing grease
Advanced synthetic grease allows for improved lubrication and greater reliability
in high speed motor applications.
āŗ High capacity reservoir
The redesigned reservoir is capable of delivering bearing lubrication over longer
and higher RPM runs.
āŗ Patented High Energy Tumbledā¢
(HET) cutting inserts
Cutting elements undergo the HET process to alter the surface attributes,
resulting in inserts that are more abrasion and impact resistant.
āŗ Advanced bearing metallurgy
A-Force bits are equipped with a silver plated journal bushing, silver plated
floating thrust washer, pilot pin and enhanced bearing hardmetal alloy for
increased durability and reliability.
Patented High Energy
Tumbled (HET) Inserts
Varel A-Force bits are designed with
tough HET conical inserts with medium
extension. The conical shape promotes
high ROPs in underbalanced drilling. The
engineered cutting structures of A-Force
bits are both durable and efficient.
12. www.varelintl.com
Challenger Series
Steel Tooth and TCI
āŗ Advanced Cutting
Structures
āŗ Shirttail
Protection
āŗ Semi-Round
Top Gage
Protection
(G Feature)*
āŗ Premium Hardfacing
āŗ Advanced Shirttail
Contouring
āŗ Center Jet Nozzle
Available
Challenger bits deliver reliable performances with time-proven
cutting structures that offer high drilling efficiency, minimize
wear and prevent tracking in a wide variety of formations.
13. 11
Overview
Challengerā¢
Series
Challenger Series Bits are designed to be durable and deliver
efficient performance in all applications.
In the large diameter performance sector (14 3/4 thru
18 1/2 diameters), improved roller bearings, redesigned head
forgings, new bearing grease, and an upgraded and larger
reservoir capacity deliver longer bearing life in the more
challenging runs that are increasingly common with today's
directional well profiles.
Varel has expanded the Jumbo bit product offering to include
additional sizes, cutting structures and bearing options to meet
all your top-hole needs. Varel is the industry leader in jumbo
bits for oil and gas wells.
Advanced Cutting Structures
Challenger cutting structures are engineered to provide
the lowest possible drilling costs. Each design has the row
placement and cutter geometry determined to provide high
drilling efficiency, minimize tooth wear and prevent tracking
in a wide variety of formations and conditions.
Advanced Shirttail Contouring
Extensive shirttail contouring and clearance from the wall of the
hole ensures that fine cuttings are carried away from the seal
area, providing longer seal life.
Gage protection
Challenger steel bits feature superior gage protection. Semi-
round top inserts are strategically placed between gage teeth,
and work in unison with hardfacing to provide additional gage
and seal protection.
Premium Hardfacing
The tooth surfaces are fortified with premium, high-density
tungsten carbide hardfacing applied by oxy-acetylene welding
for superior wear resistance.
Center Jet Nozzle (J Feature)
A fourth interchangeable jet is installed in the center of the bit
to reduce bit balling or provide extra flow capacity.
Bit Sizes
Steel
Tooth
Tungsten Carbide Insert
IADC Code 115 135 415 435 445 515 615
Inches mm
22 558.8 ā¢ ā¢
23 584.2 ā¢ ā¢ ā¢ ā¢ ā¢
24 609.6 ā¢ ā¢ ā¢
26 660.4 ā¢ ā¢ ā¢ ā¢ ā¢
28 711.2 ā¢ ā¢
Varel Jumbo Sealed Bearing Bit Availability
14. www.varelintl.com
Steel Tooth - Open Bearing Bits
āŗ High Extension
Balling Resistant
Cutting Structure
āŗ Non-Sealed
Roller Bearing
āŗ Center Water Course
15. 13
Overview
Cutting Structure
High extension balling resistant cutting structure and
application specific hardmetal patterns for high penetration
rates and long life in soft abrasive formations.
Bearing Package
Traditional ball and roller bearing, utilizing thrust buttons
for axial bearing loads, gives reliable performance under a
variety of rotary speeds and loads.
Center Jet Nozzle (J Feature)
A fourth interchangeable jet is installed in the center of
the bit to reduce bit balling or provide extra flow capacity.
(Available only in 7 7ā8 bits and larger). Smaller bits are
configured with a center fluid course.
Forged Teeth
Varel steel tooth bits 13 Ā¾ and smaller are manufactured
with our exclusive forged tooth process. This innovative
method provides stronger, more impact-resistant teeth when
compared with milling because the metal flow lines from the
forging process follow the tooth contours instead of being
cut by machining.
Open Bearings
20 and larger bits include weep holes to assist cone drainage
and cleaning between runs. Grease fittings are also included
to re-grease bearings for protection between runs and during
periods of storage.
Steel Tooth - Center Water Course
Bit Type IADC Inches (in)
Millimeters
(mm)
L2 211
3 1
ā8
, 3 Ā¼, 3 Ā½,
3 5
ā8
, 3 Ā¾, 3 7
ā8
,
4 1
ā8
, 4 Ā¼, 4 Ā½,
4 5
ā8
, 4 Ā¾, 4 7
ā8
,
5 1
ā8
, 5 Ā¼, 5 5
ā8
,
5 Ā¾, 6, 6 1
ā8
,
6 Ā¼, 6 Ā½, 6 5
ā8
6 Ā¾, 7 7
ā8
, 8 Ā½
79.3, 82.5,
88.9, 92.1,
95.2, 98.4,
104.8, 107.9,
114.3, 117.5,
120.7, 123.8,
130.1, 133.4,
142.8, 146.1,
152.4, 155.5,
158.7, 165.1,
168.3, 171.4,
200.0, 215.9
L1 311 3 7ā8, 4 Ā¾, 6 1
ā8
98.4, 120.7,
155.6
LH1 321
2 7ā8, 2 15ā16,
3 7
ā8
, 4,
4 Ā½, 4 Ā¾, 4 7ā8
73.0, 74.6,
98.4, 101.6,
114.3, 120.6,
123.8
Steel Tooth - Open Bearing Bit Availability
Bit Type IADC Inches (in)
Millimeters
(mm)
L111/L3A 111
14 Ā¾, 15,
16, 17 Ā½,
20, 21,
22, 23,
24, 26,
27 Ā½, 34,
36, 38 Ā¼,
44
374.6, 381.0,
406.4, 444.5,
508.0, 533.4,
558.8, 584.2,
609.6, 660.4,
698.5, 863.6,
914.4, 971.6,
1111.8
L113 113 26, 28 711.2
L121 121 12 Ā¼, 13 Ā¾ 311.1, 349.2
L131 131 17 Ā½, 26 444.5, 660.4
L211 211 26 660.4
16. www.varelintl.com
HE24DMRSV
Indicates Bit Series
HE= High Energy
CM= Compass
AF = A-Force
CH/CR= Challenger
Number System
One digit:
Steel tooth cutting structure
Softest-to-hardest (1-3)
Two digits:
TCI cutting structure
Softest-to-hardest (00-99)
ā Even numbers - Predominately chisel-shaped inserts
ā Odd numbers - Predominately conical-shaped inserts
Bit Nomenclature
Feature Name
Feature
Code
TCI Bit Steel Tooth Bit
Tungsten Carbide Coated
Cones
E Optional -
Cone Back Row Insert
Protection
G Standard Optional
Steel Center Jet
A-Force 7 7/8 only
H Optional -
Center Jet 7 7/8 only J Optional Optional
Shirttail Hardfacing M Standard Standard
Stabilization Inserts R Optional Optional
Leading Edge Shirttail
Inserts
S Optional Optional
V-Jet Hydraulics V
Standard on
IADC 537
Optional
Diamond Enhanced
Shirttail
Z Optional Optional
Diamond Feature
Enchanced
Nomenclature
TCI Bits
Steel Tooth
Bits
33% Back Row D ā¢ ā¢
50% Back Row D1 ā¢ ā¢
66% Back Row D2 ā¢ ā¢
100% Back Row D3 ā¢ ā¢
33% Back Row + 100% Gage DD ā¢
50% Back Row + 100% Gage D1D ā¢
66% Back Row + 100% Gage D2D ā¢
100% Back Row + 100% Gage D3D ā¢
Full Diamond Structure D3DD ā¢
Diamond Leading Edge Shirttail Z ā¢ ā¢
17. 15
Shirttail Protection
Shirttail Hardfacing ā
M Feature
Leading Edge and Hardfacing ā
S Feature
Stabilization and Hardfacing ā
R Feature
Diamond Enhanced and
Hardfacing ā Z Feature
To enhance gage holding and seal protection, Varel
roller cone bits provide value with a variety of shirttail
protection packages for high-angle drilling, abrasive
formations and steerable applications. These shirttail
protection packages can be used to tailor bits to meet
your drilling needs.
āŗ Shirttail Hardfacing (M Feature)
For demanding motor applications, a generous
application of tungsten carbide hardfacing is applied to
the shirttail lower edge and leading edge of the bit leg
to provide enhanced seal protection.
āŗ Leading Edge Shirttail Inserts (S Feature)
Tungsten carbide inserts are placed along the leading
edge of the shirttail providing additional wear resistance
in motor applications commanding high RPM or where
additional shirttail protection is needed.
āŗ Stabilization Inserts (R Feature)
Stabilization inserts enhance standard shirttail patterns
by providing bit stabilization and additional protection to
the pressure compensator in high-angle applications or
in deviation-prone formations.
āŗ Diamond Enhanced Shirttail Inserts (Z Feature)
In Varelās premium shirttail protection package PCD-
capped inserts replace tungsten carbide inserts (TCI) in
strategic locations to provide maximum shirttail protection
in abrasive formations or directional applications.
18. www.varelintl.com
āŗ Diamond Enhanced Back Row (D Feature)
Carbide, back-row inserts are replaced with polycrystalline
diamond (PCD)-capped inserts to increase gage holding in abrasive
applications.
āŗ Diamond Enhanced Gage and Back Row (DD Feature)
Back row and all gage inserts utilize PCD-capped inserts to maximize
gage holding.
āŗ Fully Diamond Enhanced Cutting Structure (D3DD Feature)
All inserts are PCD-capped to extend bit life in the most extreme
drilling conditions. The premium D3DD package features a fully
PCD-clad cutting structure providing excellent wear resistance
in the harshest environments.
āŗ Tungsten Carbide Coated Cones (E Feature)
All exposed portions of the TCI cones are coated with tungsten
carbide to provide maximum resistance in applications where cone
shell erosion limits bit life.
āŗ Steel Center Air Jet Nozzle (H Feature)
Air type bits offer an optional center air jet nozzle featuring three
additional ports for enhanced cutting structure and enhanced hole
cleaning. (Available only in 7 7/8 bits and larger)
āŗ Center Jet Nozzle (J Feature)
A fourth interchangeable jet is installed in the center of the bit to
reduce bit balling or provide extra flow capacity. (Available only in
7 7/8 bits and larger)
āŗ V-Jet Hydraulics (V Feature)
The V-Jet aimed flow stream produces better cone cleaning, which
improves bit penetration rates. In addition to new head forgings,
the new designs maximize leg strength while minimizing overall bit
length, helping to deliver more hydraulic horsepower to the hole
bottom.
Premium Options
19. Impact Strength Testing
2 3 4 5
100%
80%
60%
40%
20%
0%
DropImpactSurvivalRate
Drop Height
Drop
Height
2
3
4
5
Survival
Rate HET
100%
100%
100%
40%
Survival Rate
Non HET
33%
0%
0%
0%
Non HET
HET
17
High Energy Tumbled (HET)
Patented High Energy Tumbled (HET) cutting performance
This proprietary process for improving the attributes of tungsten
carbide inserts (TCI) overcomes the traditional trade-off between
wear resistance and fracture toughness of tungsten carbide
components and actually makes TCI components both harder and
tougher. The HET process constitutes one more quality assurance
step in the manufacturing of tungsten carbide inserts. We
manufacture the inserts used in our products and control all of the
HET processing and inspection of inserts.
Static Bending Strength
Non HET
HET
210%Increase
High Energy Tumbled (HET)
Tungsten Carbide
āŗ Patented process
āŗ Proven to increase insert
toughness
āŗ Results in greater overall
penetration rates
āŗ Reduced drilling costs
