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1、IADC DULL GRADING SYSTEM FORMAT AND CODESLOCATIONC CONE N NOSE (ROW) T TAPER S SHOULDER G GAGEA ALL AREAS/ROWS M MIDDLE ROW H HEEL ROW # CONE NO.GAGE WEARI IN GAGE 1/16 1/16“ UNDERGAGE 2/16 1/8“ UNDERGAGE * *CUTTING STRUCTUREBGREMARKSINNER ROWSOUTER ROWSDULL CHAR.LOCA- TIONBRNG/ SEALSGAGE 1/16“OTHER
2、 CHAR.REASON PULLEDCUTTING STRUCTURE WEAR0 NO WEAR * * 8 NO USABLE CUTTING STRUCTUREDULL CHARACTERISTICS*BC BROKEN CONE BT BROKEN TEETH/CUTTERS BU BALLED UP *CC CRACKED CONE *CD CONE DRAGGED CI CONE INTERFERENCE CR CORED CT CHIPPED TEETH/CUTTERRS ER EROSION FC FLAT-CRESTED WEAR HC HEAT CHECKING JD J
3、UNK DAMAGE *LC LOST CONE LN LOST NOZZLE LT LOST TEETH/CUTTERS OC OFF-CENTER WEAR PB PINCHED BIT PN PLUGGED NOZZLE/FLOW PASSAGE RG ROUNDED GAGE RO RING OUT SD SHIRTTAIL DAMAGE SS SELF-SHARPENING WEAR TR TRACKING WO WASHED-OUT BIT WT WORN TEETH/CUTTERS NO NO MAJOR/OTHER DULL CHARACTERISTICS * Show Con
4、e Number(s) Under LocationBEARING/SEAL WEARNONSEALED BEARINGS 0 NO LIFE USED * * 8 ALL LIFE USED SEALED BEARINGS E SEALS EFFECTIVE F SEALS FAILED X FIXED CUTTER BITSREASON PULLEDBHA CHANGE BOTTOMHOLEASSEMBLY DMF DOWNHOLE MOTOR FAILURE DSF DRILL STREM FAILURE DST DRILL STREM TEST DTF DOWNHOLE TOOL FA
5、ILURE LOG RUN LOGS RIG RIG REPAIR CM CONDITION MUD CP CORE POINT DP DRILL PLUG FM FORMATION CHANGE HP HOLE PROBLEMS HR HOURS PP PUMP PRESSURE PR PENETRATION RATE TD TOTAL DEPTH/CSG DEPTH TQ TORQUE TW TWIST-OFF WC WEATHER CONDITIONS WO WASHOUT DRILL STREMREMARKS: INNER ROWS inner 2/3 cuttings of the
6、cones; OUTER ROWS outer 1/3 cuttings of the cones; CUTTING STRUCTURE WEAR loss of teeth height for steel bit; reduction of cutting structure due to teeth broken and/or loss: lost teeth height(quantity)/ new bits teeth height(quantity)*8 Chinese Format: Tx(BT)-Bx-O1/2“/Ix/8 teeth height worn / x/8 cu
7、tters lost and/or broken, x/8 of bearing life is used, 1/2“ Out of gage / In gage; RECOMMENDED ROCK BIT MAKE-UP TORQUE BIT SIZERECOMMENDED TORQUE inchmmAPI REG PINft-lbsN-m 3-3/4 4-1/295.2 114.32-3/8“3,000 3,5004,000 4,800 4-5/8 5117.5 1272-7/8“6,000 7,0008,000 9,500 5-1/8 7-3/8136.5 187.33-1/2“7,00
8、0 9,0009,500 12,000 7-5/8 9193.7 228.64-1/2“12,000 16,00016,000 22,000 9-1/2 12-1/4241.3 660.46-5/8“28,000 32,00038,000 43,000 14-3/4 26274.6 660.47-5/8“34,000 40,00046,000 54,000API DIAMOND BIT MAKE-UP TORQUEBIT SIZE inchesSHANKO.D. inchesAPI REG PIN CONN inchesMAKE-UP TORQUE ft-lbs 4“; 4-1/4“;3-1/
9、82-3/83,500 4-5/8“; 4-3/4“;4-1/82-7/85,700 5-5/8“; 6“; 6-1/8“;6-1/4“; 6-3/4“; 4-3/43-1/29,400 7-3/8“; 7-5/8“; 7-3/4“; 7-7/8“; 5-3/4 8-1/2“; 8-5/8“; 8-3/4“; 9“;6-3/44-1/221,0009-5/8“; 9-7/8“; 10-5/8“; 11“; 12“; 12-1/4“;86-5/851,000 14-3/4“; 17-1/2“;9-1/27-5/880,000API BIT DIAMETER TORLERANCE BIT SIZE
10、TORLERANCE inchesmminchesmm 3-3/8 13-3/485.7 349.2+1/32 0+0.79 0 14 17-1/2355.6 444.5+1/16 0+1.59 0ROCK BIT17-5/8 & larger447.7 & larger+3/32 0+2.38 0 up to 6-3/4up to 171. 50, -0.015“0, -0.38 6-25/32 to 9172.2 to 228.60, -0.020“0, 0.51 9-1/32 to 13-3/4.229.4 to 349.30, -0.030“0, -0.76Diamond BIT 13-25/32 & larger350.0 & larger0, -0.045“0, -1.14ROCK BIT NOZLLE CODE & SIZE BIT SIZE (in.)NOZLLE CODEOPEN SIZE (1/32“)SIZE/NO. ARANGE (1/32“) 5-7/8 - 6AA 6-1/8 - 6-3/4A 7-5/8 - 9C 9-1/2 - 17-1/2D7 - 16, 18, 20, 22, 24, 28 20 - 26EJET NOZZLESIZE NUMBER RANGE: 716, 18, 20, 22, 24, 28
