Drill Bits - Gaoi
DRILL BITS and what you don’t know 1
AGENDA 1. DRAG BITS 2. CLAW BITS 3. TRI – CONE BIT 4. PDC BITS 2
DRAG BITS PERFORM WELL IN SANDS AND CLAYS 3
DRAG BIT RETIPPING THE GOOD THE BAD THE UGLY 4
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THE CLAW BIT DESIGNED FOR SANDS, CLAYS AND GRAVEL 14
KEN CLAW 15
CAN CLAW 16
MILL CLAW 17
QUICK CLAW 18
GEO INSTITUTAS 19
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TRI – CONE BIT BEARING DESIGNS 21
Tricone Bit Bearings Explained What is the differencee between sealed bearing bits and non-sealed bearing bits in Tricones? The bearings are what make the cones on a Tricone spin. There are four common types of bearings - standard open roller bearings, air-cooled roller bearings, sealed roller bearings, and sealed journal (friction) bearings. We'll look into these different types of bearings, and try to explain the differences. (The cone pictured to the left is a cut away of a roller bearing.) Standard Open Roller Bearing Air Cooled / Air Blast Bearing Sealed Roller Bearing Sealed Journal Bearing 22
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IADC CODES EVERY TRI-CONE BIT HAS A IADC CODE 29
First Digit: 1, 2, and 3 designate STEEL TOOTH BITS with 1 for soft, 2 for medium and 3 for hard formations. 4, 5, 6, 7 and 8 designate TUNGSTEN CARBIDE INSERT BITS for varying formation hardness with 4 being the softest and 8 the hardest. 30
Second Digit: 1, 2, 3 and 4 are further breakdown of formation with 1 being the softest and 4 the hardest. 31
Third Digit: This digit will classify the bit according to bearing/seal type - see information on different bearing types - and special guage wear protection as follows: 1. Standard open bearing roller bit 2. Standard open bearing roller bit, air-cooled 3. Standard open bearing roller bit with gauge protection which is defined as carbide inserts in the heel of the cone 4. Sealed roller bearing bit 5. Sealed roller bearing bit with gauge protection 6. Journal sealed bearing bit 7. Journal sealed bearing bit with gauge protection 32
EXAMPLES IADC 111 --SOFTEST FORMATION –OPEN BEARING MILLTOOTH 121-- MEDIUM FORMATION –OPEN BEARING MILLTOOTH 211--VERY SLIGHTLY HARDER MILLTOOTH OPEN BEARING 114 –SOFT FORMATION –SEALED ROLLER BEARING 416 --SOFTEST TCI BIT –SEALED JOURNAL BEARING 33
PDC BITS What makes a PDC Bit cutters body Design attributes Drilling parameters 34
Synthetic Diamonds High Pressure and High Heat is the most common way synthetic diamonds are produced. Using a press, pressures of 725 tons/square inch and temperatures of 3000º F are maintained for one hour to create the diamonds. 35
Cutter – Diamond Table – Base Sintered Polycrystalline Diamond Table Cemented Carbide Substrate 36
PDC Cutter 0º Chamfer 37
PDC Cutter 12º Chamfer 38
PDC Cutter 16º Chamfer 39
PDC Cutter 20º Chamfer 40
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Cutters Carbon Bases 42
PDC Cutter Bases Quality & Performance 43
PDC Cutter Bases Quality & Performance Poor quality Undistinguished & vague Poor bonding 44
EVALUATING CUTTER DAMAGE CHIPPED CUTTER 45
EVALUATING CUTTER DAMAGE heat checked 46
EVALUATING CUTTER DAMAGE LOST CUTTER 47
EVALUATING CUTTER DAMAGE GRAVEL DAMAGE 48
Mechanical Design Attributes Rake and Drag of cutter is critical Impact of cutter is CRITICAL 49
Rake & Drag Drag angle on outside cutter is different than the rake angle in interior Drag angle on outer cutter is reduce shock to it 50
Rake & Drag 51
Rake & Drag 52
PDC Bit Body Matrix vs. Steel 53
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PDC Drilling Parameters Weight on bit 1000 lbs./inch of bit diameter RPM 80 – 120 RPM (harder formations slower RPM) Circulation Min. 10 GPM (more is better) 60
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QUESTIONS 62
For more information call Kevin Christensen P.O. Box 4155 Williston, ND 58802 800.421.2487 palmerbit.com 63
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DRILL BITS and what you don't know 1 . 1. DRAG BITS 2. CLAW BITS 3. TRI - CONE BIT 4. PDC BITS AGENDA . 2 . DRAG BITS . PERFORM WELL IN SANDS AND CLAYS . 3 . 4 . . Weight on bit 1000 lbs./inch of bit diameter RPM 80 - 120 RPM (harder formations slower RPM) Circulation Min. 10 GPM (more is better) 60 . 61 . 62 QUESTIONS. For more .
Recall: MIPS instruction formats All MIPS instructions are 32 bits long, has 3 formats R‐type I‐type J‐type op rs rt rd shamt func 6 bits 5 bits 5 bits 5 bits 5 bits 6 bits op rs rt immediate 6 bits 5 bits 5 bits 16 bits op immediate (target address) 6 bits 26 bits
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REBAR CUTTER: Small Diameters ADX Drill Bits 3 Large Diameters RebarCUTTER 16 SDS-MAX: Adapters Core Bits, Ratio 17 Cruciform, Ratio 18 Snap Lock 13 Chisels 22 Core Bits One Piece 18 Ratio17 Cruciform Drill Bits 18 Drill Bits 7 SDS-PLUS: Adapters Core Bits, Ratio 17 RebarCUTTER , Ratio 16 Snap Lo
REBAR CUTTER: Small Diameters ADX Drill Bits 3 Large Diameters RebarCUTTER 14 SDS-MAX: Adapters Core Bits, Ratio 15 Cruciform, Ratio 16 Snap Lock 9 Chisels 22 Core Bits One Piece 16 Ratio15 Cruciform Drill Bits 16 Drill Bits 7 SDS-PLUS: Adapters Core Bits, Ratio 15 RebarCUTTER , Ratio 14 Snap Lock 9
From Pros for Pros www.keil.eu 9 HAMMER DRILL BITS PROFESSIONAL WORK MEANS ECONOMICAL WORK HAMMER DRILL BITS 251 SDS-plus MS5 TURBOHEAD Xpro 12-15 252 SDS-plus W2 TURBOKEIL X-Form 16 253 SDS-plus MS5 TURBOKEIL 17-20 255 SDS-plus MS5 VARIO 21 256 SDS-plus hammer drill bit KEILRAPID 22 270 SDS-max W2 TURBOHEAD Xpro / TURBOKEIL X-Form 23-26
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The shank is the part of the drill bit grasped by the chuck of a drill. The cutting edges of the drill bit are at one end, and the shank is at the other. Drill bits come in standard sizes, described in the drill bit sizes article. A comprehensive drill bit and tap size chart lists metric and imperial sized drill bits alongside the required .
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