Drill Collars
Improve your drill string design with Grant Prideco drill collars.
Description
Specifications
Drill Collars Specifications
Drill Collar Material Mechanical Properties
| Drill Collar Diameter (in.) | Minimum Yield Strength (psi) | Minimum Tensile Strength (psi) | Minimum Hardness (BHN) |
3⅛ through 6⅞ | 110,000 | 140,000 | 285 |
7 and above | 100,000 | 135,000 | 285 |
Tensile properties are determined by tests on cylindrical specimens conforming to the requirements of the current ASTM A370, 0.2% offset method. Hardness tests are performed on the OD of drill collars in compliance with current ASTM standards.
Slip Recess Dimensions
| Drill Collar Diameter (in.) | Slip Recess Diameter (in.) |
4⅛ | 3¾ |
4¾ | 4⅜ |
5 | 4⅝ |
6 | 5½ |
6¼ | 5¾ |
6½ | 6 |
6¾ | 6¼ |
7 | 6½ |
7¼ | 6¾ |
7¾ | 7¼ |
8 | 7½ |
8¼ | 7¾ |
9 | 8¼ |
9½ | 9 |
9¾ | 9¼ |
10 | 9½ |
11 | 10½ |
Resources