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 and Elevator Recess Dimensions | |||
|---|---|---|---|
| Drill Collar Diameter (in.) | Elevator Recess Diameter (in.) | Slip Recess Diameter (in.) | Elevator Recess Radius (in.) |
4⅛ | 3 11 / 16 | 3¾ | ⅛ |
4¾ | 4¼ | 4⅜ | ⅛ |
5 | 4½ | 4⅝ | ⅛ |
6 | 5⅜ | 5½ | ⅛ |
6¼ | 5⅝ | 5¾ | ⅛ |
6½ | 5⅞ | 6 | ⅛ |
6¾ | 6 | 6¼ | 3 / 16 |
7 | 6¼ | 6½ | 3 / 16 |
7¼ | 6½ | 6¾ | 3 / 16 |
7¾ | 7 | 7¼ | 3 / 16 |
8 | 7¼ | 7½ | 3 / 16 |
8¼ | 7½ | 7¾ | 3 / 16 |
9 | 8⅛ | 8¼ | ¼ |
9½ | 8⅝ | 9 | ¼ |
9¾ | 8⅞ | 9¼ | ¼ |
10 | 9⅛ | 9½ | ¼ |
11 | 10⅛ | 10½ | ¼ |