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As you drill in areas closer to the earth's magnetic poles, it is essential to use a non-magnetic drill collar. Our non-mag drill collars offer strength and hardness while neutralizing magnetic inference. Compatible with standard drill string tools and stabilizers, our non mag drill collars are manufactured to API Spec 7-1. Inventory includes:
We treat our non-mag material ID with a shot peening operation to compress the inside diameter which prevents stress corrosion while drilling in H2S environments.
| Common Connections | OD (in) | ID (in) | Approx Weight (lbs) |
|---|---|---|---|
| 2 7/8 REG | 3 1/2 to 3 7/8 | 1 1/4 to 1 3/4 | 760-1114 |
| 3 1/2 REG | 4 1/8 to 4 1/2 | 1 1/4 to 2 1/4 | 989-1490 |
| 3 1/2 IF NC38 | 4 3/4 to 5 1/2 | 1 3/4 to 2 13/16 | 1350-2250 |
| 4 FH NC40 | 5 to 6 | 1 3/4 to 2 13/16 | 1552-2726 |
| 4 1/2 FH | 5 1/2 to 6 1/2 | 2 to 3 | 1759-3166 |
| 4 1/2 XH NC46 | 5 3/4 to 6 3/4 | 2 1/4 to 3 | 1992-3352 |
| 4 1/2 IF NC50 | 6 1/4 to 7 1/2 | 2 1/4 to 3 1/4 | 2359-4237 |
| 5 1/2 FH NC56 | 7 to 7 3/4 | 2 1/4 to 3 1/4 | 3182-4552 |
| 6 5/8 REG | 7 1/4 to 8 | 2 1/2 to 3 1/4 | 3476-4780 |
| 6 5/8 FH | 7 1/2 to 8 1/4 | 2 1/2 to 3 1/4 | 3782-5116 |
| 7 5/8 REG | 8 1/2 to 9 1/2 | 2 1/2 to 3 3/4 | 4816-6953 |
Used to add weight to the bit and stiffness to bottom hole assembly, our Drill Collars are an invaluable downhole tool.
To keep you drilling in the right direction, run our Drill Collars in combination with our Stabilizers to resist bucking. Manufactured from an AISI 4145H modified heat treated alloy steel, our strict quality assurance guidelines assure metallurgical integrity of each and every bar.
Our Drill Collar bars are batch or continuous line heat treated and have both cold-worked and Phosphate coated connections.
| O.D. (in) | I.D. (in) | Weight in Air (lbs) | Unit Weight (lbs/ft) | Standard End Connections |
|---|---|---|---|---|
| 3 1/2 | 1 1/2 | 826.8 | 26.7 | NC-26 thru 35 |
| 4 1/8 | 2 | 1076.2 | 34 | NC-31 thru 41 |
| 4 3/4 | 2 1/4 | 1447.0 | 46.7 | NC-38 thru 47 |
| 5 | 2 1/4 | 1648.5 | 53.2 | NC-38 thru 50 |
| 6 | 2 1/4 | 2558.0 | 82.5 | NC-44 thru 60 |
| 6 | 2 13/16 | 2322.3 | 74.9 | NC-44 thru 60 |
| 6 1/4 | 2 1/4 | 2811.2 | 90.7 | NC-44 thru 62 |
| 6 1/4 | 2 13/16 | 2575.6 | 83.1 | NC-46 thru 65 |
| 6 1/2 | 2 1/4 | 3074.8 | 99.2 | NC-46 thru 65 |
| 6 1/2 | 2 13/16 | 2839.1 | 91.6 | NC-46 thru 65 |
| 6 3/4 | 2 1/4 | 3348.7 | 108.0 | NC-46 thru 67 |
| 7 | 2 1/4 | 3632.9 | 117.2 | NC-50 thru 70 |
| 7 | 2 13/16 | 3397.2 | 109.6 | NC-50 thru 70 |
| 7 1/4 | 2 13/16 | 3691.8 | 119.1 | NC-50 thru 72 |
| 8 | 2 13/16 | 4637.5 | 149.6 | 6 5/8 Regular |
| 8 1/4 | 2 13/16 | 4973.4 | 160.4 | 6 5/8 Regular |
| 9 1/2* | 3 | 6718.0 | 216.7 | 7 5/8 Regular |
| 9 3/4* | 3 | 7116.0 | 229.5 | 7 5/8 Regular |
| 11* | 3 | 9260.6 | 298.7 | 8 5/8 Regular |
| Collar O.D. (in) | Elevator Recess Dia (in) | Slip Recess Dia (in) | Elevator Recess Radius (in) | Top Elevator Bore (in) | Lower Half Elevator Bore (in) |
|---|---|---|---|---|---|
| 4 1/8 | 3 11/16 | 3 3/4 | 1/8 | 3 13/16 | 4 1/4 |
| 4 3/4 | 4 1/4 | 4 3/8 | 1/8 | 4 3/8 | 4 7/8 |
| 5 | 4 1/2 | 4 5/8 | 1/8 | 4 5/8 | 5 1/8 |
| 6 | 5 3/8 | 5 1/2 | 1/8 | 5 1/2 | 6 1/8 |
| 6 1/4 | 5 5/8 | 5 3/4 | 1/8 | 5 3/4 | 6 3/8 |
| 6 1/2 | 5 7/8 | 6 | 1/8 | 6 | 6 5/8 |
| 6 3/4 | 6 | 6 1/4 | 3/16 | 6 3/16 | 6 7/8 |
| 7 | 6 1/4 | 6 1/2 | 3/16 | 6 7/16 | 7 1/8 |
| 7 1/4 | 6 1/2 | 6 3/4 | 3/16 | 6 11/16 | 7 3/8 |
| 8 | 7 1/4 | 7 1/2 | 3/16 | 7 7/16 | 8 1/8 |
| 8 1/4 | 7 1/2 | 7 3/4 | 3/16 | 7 11/16 | 8 3/8 |
| 9 1/2 | 8 5/8 | 9 | 1/4 | 8 7/8 | 9 5/8 |
| 9 3/4 | 8 7/8 | 9 1/4 | 1/4 | 9 1/8 | 9 7/8 |
| 11 | 10 1/8 | 10 1/2 | 1/4 | 10 3/8 | 11 1/8 |
