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QingDao Hyster Petroleum Equipment Co.,Ltd
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Active Member
8 Years |
According to API Spec.7 and SY/T5144, drill collar is made of AISI
4145 modified chromium- molybdenum alloy steel.
All threads are phosphated，copperized or cold rolled and they are
machined with CNC Lathes–Double–shoulderd,including
some special threads. The maximum outer diameter of drill collars
can amount to 14 inch.
Specifications
Connections | OD | ID | L mm | corner DFmm | Strength ratio | ||
mm | in | mm | in | ||||
NC23-31 | 79.4 | 3 1/8 | 31.8 | 1 1/4 | 9150 | 76.2 | 2.57:1 |
NC26-35 | 88.9 | 3 1/2 | 38.1 | 1 1/2 | 9150 | 82.9 | 2.42:1 |
NC31-41 | 104.8 | 4 1/8 | 50.8 | 2 | 9150 or 9450 | 100.4 | 2.43:1 |
NC35-47 | 120.7 | 4 3/4 | 50.8 | 2 | 9150 or 9450 | 114.7 | 2.58:1 |
NC38-50 | 127.0 | 5 | 57.2 | 2 1/4 | 9150 or 9450 | 121.0 | 2.38:1 |
NC44-60 | 152.4 | 6 | 57.2 | 2 1/4 | 9150 or 9450 | 144.5 | 2.49:1 |
NC44-60 | 152.4 | 6 | 71.4 | 2 13/16 | 9150 or 9450 | 144.5 | 2.84:1 |
NC44-62 | 158.8 | 6 1/4 | 57.2 | 2 1/4 | 9150 or 9450 | 149.2 | 2.91:1 |
NC46-62 | 158.8 | 6 1/4 | 71.4 | 2 13/16 | 9150 or 9450 | 150.0 | 2.63:1 |
NC46-65 | 165.1 | 6 1/2 | 57.2 | 2 1/4 | 9150 or 9450 | 154.8 | 2.76:1 |
NC46-65 | 165.1 | 6 1/2 | 71.4 | 2 13/16 | 9150 or 9450 | 154.8 | 3.05:1 |
NC46-67 | 171.4 | 6 3/4 | 57.2 | 2 1/4 | 9150 or 9450 | 159.5 | 3.18:1 |
NC50-67 | 171.4 | 6 3/4 | 71.4 | 2 13/16 | 9150 or 9450 | 159.5 | 2.37:1 |
NC50-70 | 177.8 | 7 | 57.2 | 2 1/4 | 9150 or 9450 | 164.7 | 2.54:1 |
NC50-70 | 177.8 | 7 | 71.4 | 2 13/16 | 9150 or 9450 | 164.7 | 2.73:1 |
NC50-72 | 184.2 | 7 1/4 | 71.4 | 2 13/16 | 9150 or 9450 | 169.5 | 3.12:1 |
NC56-77 | 196.8 | 7 3/4 | 71.4 | 2 13/16 | 9150 or 9450 | 185.3 | 2.70:1 |
NC56-80 | 203.2 | 8 | 71.4 | 2 13/16 | 9150 or 9450 | 190.1 | 3.02:1 |
6 5/8REG | 209.6 | 8 1/4 | 71.4 | 2 13/16 | 9150 or 9450 | 195.7 | 2.93:1 |
NC61-90 | 228.6 | 9 | 71.4 | 2 13/16 | 9150 or 9450 | 212.7 | 3.17:1 |
7 5/8REG | 241.3 | 9 1/2 | 76.2 | 3 | 9150 or 9450 | 223.8 | 2.81:1 |
NC70-97 | 247.6 | 9 3/4 | 76.2 | 3 | 9150 or 9450 | 232.6 | 2.57:1 |
NC70-100 | 254.0 | 10 | 76.2 | 3 | 9150 or 9450 | 237.3 | 2.81:1 |
8 5/8REG | 279.4 | 11 | 76.2 | 3 | 9150 or 9450 | 266.7 | 2.84:1 |
OD | Yield Strength σ0.2 MPa | Tensile Strength σb MPa | Elongation δ4 % | BH | Charpy Impact Ak J | |
mm | in | |||||
79.4~171.4 | 3 1/8~6 3/4 | ≥758 | ≥965 | ≥13 | ≥285 | ≥54 |
177.8~279.4 | 7~11 | ≥689 | ≥930 | |||
OD | OD | ID | L | Shoulder corner DF | ||
mm | in | |||||
≤88.9 | ≤3 1/2 | +1.20 | +1.60 | ±152.4 | ±0.4 | |
＞88.9~114.3 | ＞3 1/2~4 1/2 | +1.60 | ||||
＞114.3~139.7 | ＞4 1/2~5 1/2 | +2.00 | ||||
＞139.7~165.1 | ＞5 1/2~6 1/2 | +3.20 | ||||
＞165.1~215.9 | ＞6 1/2~8 1/2 | +4.00 | ||||
＞215.9~241.3 | ＞8 1/2~9 1/2 | +4.80 | ||||
＞241.3 | ＞9 1/2 | +6.40 | ||||
Connections | Lx ±1.59mm | Dcb +0.40－0mm | ±20.83mm/m | DRC +0－0.79mm | LRG+0－3.18mm |
NC35 | 82.6 | 82.15 | 166.67 | 82.15 | 85.73 |
NC38 | 88.9 | 88.11 | 166.67 | 89.10 | 92.08 |
NC40 | 101.6 | 92.87 | 166.67 | 95.81 | 104.78 |
NC44 | 101.6 | 101.60 | 166.67 | 106.36 | 104.78 |
NC46 | 101.6 | 106.76 | 166.67 | 109.93 | 104.78 |
NC50 | 101.6 | 117.48 | 166.67 | 120.45 | 104.78 |
NC56 | 114.3 | 121.84 | 250.00 | 134.04 | 117.48 |
NC61 | 127.0 | 132.95 | 250.00 | 148.31 | 130.18 |
NC70 | 139.7 | 152.00 | 250.00 | 170.54 | 142.88 |
NC77 | 152.4 | 166.29 | 250.00 | 188.01 | 155.58 |
6 5/8REG | 114.3 | 134.14 | 166.67 | 137.59 | 117.48 |
7 5/8REG | 120.7 | 148.83 | 250.00 | 161.26 | 123.83 |
8 5/8REG | 123.8 | 172.24 | 250.00 | 185.45 | 127.00 |
Drill collar OD | Depth of elevator ±0.2 | R1c | Angle αb | Depth of slip recesses ±0.4 | Angle βb |
101.6~117.5 | 5.6 | 3.2±0.4 | 4° | 4.8 | 3.5° |
120.6~142.9 | 6.4 | 3.2±0.4 | 5° | 4.8 | 3.5° |
146.0~168.3 | 7.9 | 3.2±0.4 | 6° | 6.4 | 5° |
171.4~219.1 | 9.5 | 4.8±0.8 | 7.5° | 6.4 | 5° |
≥222.2 | 11.1 | 6.4±0.8 | 9° | 6.4 | 5° |
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Drill Collar Images |
