Mill

ed T

ooth

Bits

Seri

es

Formations

Type

Reed

Hyca

log

Reed

Hyca

log

Standard Roller

Soft formationswith low compressionstrength and highdrillability

Hard semiabrasive orabrasive formations

Medium to medium-hardformations with highcompressive strength

Sealed Bearing Sealed Roller Bearing and Gauge Protection Friction Bearing

Features

Hugh

es

Hugh

es

Smith

Smith

Secu

rity

Secu

rity

Secu

rity

DR5

R7

Smith

Reed

Hyca

log

XN5

Smith

Secu

rity

Note: Bits shown are based on individual manufacturer’s published availabilty data. Comparisons may differ in particular drilling areas. Your ReedHycalog representative can provide specific data for your needs.

IADC Code Roller Cone Tooth Bit Comparison Chart

Reed

Hyca

log

Hugh

es

Smith

Secu

rity

Hugh

es

DTJ HP12 FDT SL12, HP12

Reed

Hyca

log

L4H

XN4V2J FVHFV XS4, XL4SVH, MSVH XT4 ATJ-4 HP21G ATJ-G4

ATJ-G8

Y13 XN3R3 DGJ GTX-3 MCG+ FDGH, MFDGHHP13 FDG XS3, XL3T13EMS13GETS136

GTX-G3, MAX-GT3MX-3

SDGH, MSDGHMGGH+

XT3 D13, HP13G MX-3

Y11 XN1R1 GTX-1 MFDSH, FDSH+, MFDSSH, FDS+2FDSS+2, FGS+, FGS+2, FGSH+FDSS+, FGSS+2, XR+, FGSSH+, FGXi

HP11DSJ SDS FDS FDSS+

XS1, XL1T11EMS11GETS11G

GTX-G1, MAX-GT1MX-1

MSDSH, MSDSSHGGSSH+, MGSH+

XT1 GT-1 SL11, TC10TC11, TD11D11

XLX-1, GT-G1HGT-G1, STX-1MX-1, STR-1

Hugh

es

Sealed Friction Bearing and Gauge Protection

TM

Other dull characteristicRefer to column three codes.

7

Reason pulled or run terminated8

BHA – change bottomhole assemblyDMF – downhole motor failureDTF – downhole tool failureDSF – downhole string failureDST – drill stem testLOG – run logsLIH – left in holeRIG – rig repairCM – condition mudCP – core pointDP – drill plugFM – formation changeHP – hole problemsHR – hours on bitPP – pump pressurePR – penetration rateTD – total depth/casing depthTQ – torqueTW – twist offWC – weather conditions

Gauge measure in 1⁄16 of an inch.6I – In gauge1⁄16–1⁄16 in. out of gauge2⁄16–1⁄8 in. out of gauge4⁄16–1⁄4 in. out of gauge

Location4

N – nose rowM – middle rowG – gauge rowA – all rows

Cone no.123

Roller cone

C – coneN – noseT – taper

S – shoulderG – gaugeA – all areas

Fixed rutter

Bearings/seals5

A linear scale estimating bearing life used. (0 – No life used, 8 – All life used, i.e., no bearing life remaining.)

E – seals effectiveF – seals failedN – not able to gradeX – fixed cutter bit (bearingless)

Nonsealed bearings

Sealed bearings

NozzleSize(in. [mm])

NozzleNumber

7

8

9

10

11

12

13

14

15

16

18

20

22

24

28

7⁄32 [5.5]1⁄4 [6.4]9⁄32 [7.1]5⁄16 [7.9]11⁄32 [8.7]3⁄8 [9.5]13⁄32 [10.3]7⁄16 [11.1]15⁄32 [11.9]1⁄2 [12.7]9⁄16 [14.3]5⁄8 [15.9]11⁄16 [17.5]3⁄4 [19.0]7⁄8 [22.2]

0.0376 [24.3]

0.0491 [31.7]

0.0621 [40.1]

0.0767 [49.5]

0.0928 [59.5]

0.1104 [71.2]

0.1296 [83.6]

0.1503 [97.0]

0.1726 [111.4]

0.1963 [126.6]

0.2485 [160.3]

0.3068 [197.9]

0.3712 [239.5]

0.4418 [285.0]

0.6013 [387.9]

0.0752 [48.5]

0.0982 [63.4]

0.1242 [80.1]

0.1534 [99.0]

0.1856 [119.7]

0.2209 [142.5]

0.2592 [167.2]

0.3007 [194.0]

0.3451 [222.8]

0.3927 [253.2]

0.4970 [320.6]

0.6136 [395.9]

0.7424 [479.0]

0.8836 [570.1]

1.2026 [775.9]

0.1127 [72.9]

0.1473 [95.0]

0.1864 [120.2]

0.2301 [148.4]

0.2784 [179.6]

0.3313 [213.7]

0.3889 [250.9]

0.4510 [291.0]

0.5177 [334.2]

0.5890 [379.8]

0.7455 [481.0]

0.9204 [593.8]

1.1137 [718.5]

1.3254 [855.0]

1.8040 [1163.7]

0.1503 [97.0]

0.1963 [126.1]

0.2485 [160.3]

0.3068 [197.9]

0.3712 [239.5]

0.4418 [285.0]

0.5185 [334.5]

0.6013 [388.0]

0.6903 [445.4]

0.7854 [506.7]

0.9940 [641.3]

1.2272 [791.8]

1.4849 [958.1]

1.7672 [1140.2]

2.4053 [1551.9]

Flow Areaof One Nozzle

Flow Areaof Two Nozzles

Flow Areaof Four Nozzles

Flow Areaof Three Nozzles

Jet

Noz

zle

Flo

w A

reas

1

2

Inner cutting structure(all inner rows)

Outer cutting structure(gauge row only)

In columns 1 and 2, a linear scale from 0 to 8 is used to describe the condition of the cutting structure according to the following:

Steel tooth bitsA measure of lost tool height resulting from abrasion and/or damage.0 – No loss of tooth height.8 – Total loss of tooth height.

Insert bitsA measure of total cutting structure reduction resulting from lost, worn and/or broken inserts.0 – No lost, worn and/or broken inserts.8 – All inserts lost, worn and/or broken.

Fixed cutter bitsA measure of lost, worn and/or broken cutting structure.0 – No lost, worn and/or cutting structure.8 – All of cutting structure Lost, worn and/or broken.

3 Dull characteristics (Use only cutting structure related codes.)

BC – broken coneBF – bond failureBT – broken teeth/cuttersBU – balled up bitCC – cracked coneCD – cone draggedCI – cone InterferenceCR – coredCT – chipped teeth/cuttersER – erosionFC – flat crested wearHC – heat checkingJD – junk damageLC – lost coneLN – lost nozzleLT – lost teeth/cuttersOC – off-center wearPB – pinched bitPN – plugged nozzle/flow passageRG – rounded gaugeRO – ring outSD – shirttail damageSS – self-sharpening wearTR – trackingWO – washed out bitWT – worn teeth/cuttersNO – no dull characteristic

†Show Cone number or numbers under location

Bit Size(in. [mm])

API Pin Size(in. [mm])

Recommended Torque(lbt-ft [Newton])

33⁄4–41⁄2 [95.2–114.3]

45⁄8–5 [117.5–127.0]

51⁄8–73⁄8 [136.5–187.3]

75⁄8–9 [193.7–228.6]

91⁄2–26 [241.3–660.4]

143⁄4–26 [374.6–660.4]

23⁄8 [60.3]

27⁄8 [73.0]

31⁄2 [88.9

41⁄2 [114.3]

65⁄8 [168.3]

75⁄8 [193.7]

3,000–3,500 [4,000–4,800]

6,000–7,000 [8,000–9,500]

7,000–9,000 [9,500–12,000]

12,000–16,000 [16,000–22,000]

28,000–32,000 [38,000–43,000]

34,000–40,000 [46,000–54,000]

Recommended Roller Cone

Makeup Torque

IADC

Dul

l Bi

t Gr

adin

gCutting Structure

LocationInner

1

Outer

2 4

Bearings/Seals

5

Gauge

6

Other Dull Characteristics

7

Reason Pulled

8

Dull Characteristics

3

(in.2 [mm2]) (in.2 [mm2])(in.2 [mm2])(in.2 [mm2])

†

††

†

Revision Date :5-19-04