There are many pieces of type A drill collar slips, and they are fitting outside diameter size changes after the drill collar wear.
The main features are light weight, large range and fastness.
Design and manufacture by API SPEC 7k.
Drill collars card model | A3-4.1/2 | A3.1/4- 4.3/4 | A4.1/4- 5.3/4 | A5.1/2-7 | A6.3/4- 8.1/4 | A8.1/4-10 | A10- 11.3/4 | |
Drill collar OD | in | 3-4.1/2 | 3.1/4- 4.3/4 | 4.1/4- 5.3/4 | 5.1/2-7 | 6.3/4- 8.1/4 | 8.1/4-10 | 10-11.3/4 |
mm | 76.2- 114.3 | 82.55- 120.65 | 107.95- 146.05 | 139.5- 177.8 | 171.5- 209.55 | 209.55- 254 | 254- 298.45 | |
The applicable outer lining number | API or No.3 | No.2 | ||||||