Specifications
spiral drill collar:1.Meeting to API7-1
2.OD:4 1/8"-11"
3.Length:5"-31"
spiral drill collar
1.Meeting to API7-1
2.OD:4 1/8"-11"
3.Length:5"-31"
4. Drill collars are made of ANSI4137 ,4145H,4145HM alloy steel.
5.Type: slick drill collar,spiral drill collar,spiral drill collar with elevator groove and slip groove and non-magnetic drill collar
O.D. | I.D. | Connections | ||
inch | mm | inch | mm | |
4 1/8 | 104.78 | 2 | 50.80 | NC31,NC35 |
4 3/4 | 120.65 | 2 | 50.80 | NC35, NC38(3 1/2IF) |
6 1/4 | 158.75 | 2 1/4 2 13/16 | 57.15 71.44 | NC44, NC46(4IF) |
6 1/2 | 165.1 | 2 1/4 2 13/16 | 57.15 71.44 | NC46(4IF) NC46(4IF) |
7 | 177.8 | 2 1/4 2 13/16 | 57.15 71.44 | NC50(4 1/2IF) NC50(4 1/2IF) |
8 | 203.2 | 2 13/16 | 71.44 | NC56 |
9 | 228.6 | 2 13/16 | 71.44 | NC61 |
9 1/2 | 241.3 | 3 | 76.20 | 7 5/8REG |
10 | 254 | 3 | 76.20 | NC70 |
11 | 279.4 | 3 | 76.20 | 8 5/8REG |
non-magnetic drill collar spiral drill collar