MAGNETIC DRILL COLLAR
- Slick and Spiral Drill Collars
according to API Spec 7-1 - NS1 and DS1 properties
- 4145H Material. Hot Rolled
- Stress Reflief Groove
- SRG on PIN
- Bore Back on Box
- Connections Phospatized
- Cold Roll on Threads to improve
fatigue resistance - Thread Protectors
- Pony Drill Collar available
NON MAGNETIC DRILL COLLAR
- Drill Collars are made from high purity
austenitic stainless steel. - Low & High Yield Material available
- Advanced chemical composition control system and special forging process guarantee the excellent mechanical properties, corrosion
resistant performance and high fatigue resistance of our Non- Magnetic material. - Shoot Peening on Connections.
DRILL COLLARS SIZES
Item | OD (IN) | ID (IN) | LG (ft) | Conexión Preffered | Conexión (Other) | Recommended Make-Up Torque ft-lbs | Torsional Strength ft-lbs | Bending Strenght Ratio (BSR) | Weight Slick (kg) | Weight Spiral (kg) | |
1 | 3 1/8 | 1 1/4 | 31 | NC 23 | 3.300 | 5.860 | 2.57:1 | 306 | NA | ||
2 | 3 1/2 | 1 1/2 | 31 | NC 26 | 2 3/8 IF | 4.600 | 8.100 | 2.42:1 | 372 | NA | |
3 | 4 1/8 | 2 | 31 | NC 31 | 2 7/8 IF | 6.900 | 12.100 | 2.44:1 | 485 | 458 | |
4 | 4 3/4 | 2 | 31 | NC 35 | 10.800 | 19.100 | 2.58:1 | 689 | 653 | ||
5 | 4 3/4 | 2 | 31 | NC 38 | 3 1/2 IF | 9.990 | 17.600 | 1.80:1 | 689 | 653 | |
6 | 4 3/4 | 2 1/4 | 31 | NC 38 | 3 1/2 IF | 9.990 | 17.600 | 1.92:1 | 649 | 617 | |
7 | 4 3/4 | 2 1/4 | 31 | NC 35 | 9.200 | 16.200 | 2.82:1 | 649 | 617 | ||
8 | 4 3/4 | 2 1/2 | 31 | NC 38 | 3 1/2 IF | 9.990 | 17.600 | 2.10:1 | 608 | 572 | |
9 | 5 | 2 | 31 | NC 38 | 3 1/2 IF | 12.900 | 22.700 | 2.24:1 | 752 | 790 | |
10 | 5 | 2 1/4 | 31 | NC 38 | 3 1/2 IF | 12.900 | 22.700 | 2.38:1 | 739 | 703 | |
11 | 5 1/4 | 2 1/4 | 31 | NC 38 | 3 1/2 IF | 12.900 | 22.700 | 2.88:1 | 835 | 789 | |
12 | 5 3/4 | 2 1/4 | 31 | NC 46 | 4 IF | 17.700 | 31.200 | 1.68:1 | 1.039 | 993 | |
13 | 5 3/4 | 2 1/4 | 31 | NC 40 | 4 FH | 17.000 | 30.000 | 3.04:1 | 1.039 | 993 | |
14 | 6 | 2 1/4 | 31 | NC 46 | 4 IF | 23.400 | 41.200 | 2.02:1 | 1.148 | 1.093 | |
15 | 6 | 2 13/16 | 31 | NC 46 | 4 IF | 22.400 | 39.500 | 2.24:1 | 1.043 | 984 | |
16 | 6 1/4 | 2 1/4 | 31 | NC 46 | 4 IF | 28.000 | 49.300 | 2.38:1 | 1.261 | 1.202 | |
17 | 6 1/4 | 2 13/16 | 31 | NC 46 | 4 IF | 22.400 | 39.500 | 2.64:1 | 1.157 | 1.098 | |
18 | 6 1/4 | 2 13/16 | 31 | NC 50 | 4 1/2 IF | 23.000 | 40.500 | 1.71:1 | 1.157 | 1.098 | |
19 | 6 1/2 | 2 1/4 | 31 | NC 46 | 4 IF | 28.000 | 49.300 | 2.77:1 | 1.379 | 1.311 | |
20 | 6 1/2 | 2 1/4 | 31 | NC 50 | 4 1/2 IF | 29.700 | 52.200 | 1.89:1 | 1.379 | 1.311 | |
21 | 6 1/2 | 2 13/16 | 31 | NC 46 | 4 IF | 22.400 | 39.500 | 3.07:1 | 1.275 | 1.207 | |
22 | 6 1/2 | 2 13/16 | 31 | NC 50 | 4 1/2 IF | 29.700 | 52.200 | 2.03:1 | 1.275 | 1.207 | |
23 | 6 3/4 | 2 1/4 | 31 | NC 50 | 4 1/2 IF | 36.700 | 64.700 | 2.21:1 | 1.501 | 1.433 | |
24 | 6 3/4 | 2 1/2 | 31 | NC 50 | 4 1/2 IF | 35.800 | 63.000 | 2.26:1 | 1.456 | 1.388 | |
25 | 6 3/4 | 2 1/2 | 31 | NC 46 | 4 IF | 35.800 | 63.000 | 2.26:1 | 1.356 | 1.430 | |
26 | 6 3/4 | 2 3/4 | 31 | NC 50 | 4 1/2 IF | 32.300 | 56.800 | 2.37:1 | 1.397 | 1.324 | |
27 | 6 3/4 | 2 13/16 | 31 | NC 50 | 4 1/2 IF | 32.300 | 56.800 | 2.37:1 | 1.397 | 1.324 | |
28 | 7 | 2 1/4 | 31 | NC 50 | 4 1/2 IF | 38.400 | 61.400 | 2.54:1 | 1.628 | 1.538 | |
29 | 7 | 2 1/2 | 31 | NC 50 | 4 1/2 IF | 35.800 | 57.300 | 2.61:1 | 1.588 | 1.492 | |
30 | 7 | 2 13/16 | 31 | NC 50 | 4 1/2 IF | 32.300 | 51.600 | 2.73:1 | 1.524 | 1.429 | |
31 | 7 | 2 13/16 | 31 | 5 1/2 FH | 32.800 | 52.400 | 1.72:1 | 1.524 | 1.429 | ||
32 | 7 1/4 | 2 13/16 | 31 | NC 50 | 4 1/2 IF | 32.300 | 47.300 | 3.12:1 | 1.710 | 1.593 | |
33 | 7 1/4 | 3 | 31 | 5 1/2 FH | 41.000 | 49.600 | 2.05:1 | 1.665 | 1.551 | ||
34 | 7 3/4 | 2 13/16 | 31 | 6 5/8 REG | 53.300 | 79.000 | 2.30:1 | 1.998 | 1.860 | ||
35 | 7 3/4 | 3 | 31 | 6 5/8 REG | 50.700 | 78.500 | 2.35:1 | 1.955 | 1.778 | ||
36 | 8 | 2 13/16 | 31 | 6 5/8 REG | 53.300 | 85.400 | 2.60:1 | 2.077 | 1.964 | ||
37 | 8 | 3 | 31 | 6 5/8 REG | 50.700 | 81.100 | 2.66:1 | 2.037 | 1.923 | ||
38 | 8 1/4 | 2 13/16 | 31 | 6 5/8 REG | 53.300 | 85.400 | 2.93:1 | 2.227 | 2.100 | ||
39 | 8 1/4 | 3 | 31 | 6 5/8 REG | 50.700 | 81.100 | 2.99:1 | 2.186 | 2.059 | ||
40 | 8 1/2 | 2 1/4 | 31 | 6 5/8 REG | 50.700 | 81.100 | 3.14:1 | 2.391 | 2.530 | ||
41 | 8 1/2 | 2 13/16 | 31 | 6 5/8 REG | 53.300 | 85.400 | 3.27:1 | 2.381 | 2.250 | ||
42 | 8 1/2 | 3 | 31 | 6 5/8 REG | 50.700 | 81.100 | 3.34:1 | 2.341 | 2.209 | ||
43 | 8 1/2 | 3 1/4 | 31 | 6 5/8 REG | 46.900 | 75.100 | 3.46:1 | 2.286 | 2.155 | ||
44 | 9 | 2 13/16 | 31 | 7 5/8 REG | 84.400 | 135.000 | 2.28:1 | 2.703 | 2.463 | ||
45 | 9 | 2 13/16 | 31 | 6 5/8 FH | 84.000 | 134.000 | 2.41:1 | 2.708 | 2.468 | ||
46 | 9 | 3 | 31 | 7 5/8 REG | 84.400 | 135.000 | 2.31:1 | 2.667 | 2.422 | ||
47 | 9 | 3 | 31 | 6 5/8 FH | 81.100 | 130.000 | 2.44:1 | 2.667 | 2.422 | ||
48 | 9 | 3 1/2 | 31 | 6 5/8 FH | 72.100 | 115.000 | 2.56:1 | 2.545 | 2.304 | ||
49 | 9 1/2 | 2 13/16 | 31 | 7 5/8 REG | 91.600 | 147.000 | 2.78:1 | 3.048 | 2.799 | ||
50 | 9 1/2 | 3 | 31 | 7 5/8 REG | 88.600 | 142.000 | 2.81:1 | 3.007 | 2.758 | ||
51 | 9 1/2 | 3 1/16 | 31 | 7 5/8 REG | 87.500 | 140.000 | 2.83:1 | 2.994 | 2.744 | ||
52 | 9 3/4 | 3 | 31 | 7 5/8 REG | 91.800 | 147.000 | 3.10:1 | 3.184 | 2.935 | ||
53 | 10 | 3 | 31 | 8 5/8 REG | 109.000 | 175.000 | 1.98:1 | 3.366 | 3.084 | ||
54 | 11 | 3 | 31 | 8 5/8 REG | 131.000 | 209.000 | 2.84:1 | 4.166 | 3.815 |