Specifications
drill collar:1.standard:API7-1
2.OD:3 1/8"-11"
3.Length:5"-31"
drill collar
1.Meeting to API7-1
2.OD:3 1/8",3 1/2",4 1/8",4 3/4",5",6",,6 1/4',6 1/2",6 3/4",7",7 1/4",7 3/4",8",8 1/4",9",10",11"
3.Length:5"-31"
4.Type: slick drill collar,spiral drill collar,spiral drill collar with elevator groove and slip groove and non-magnetic drill collar
5.Material:ANSI4137 ,4145H,4145HM alloy steel.
The Main Technical Specification of Drill Collar | ||||
O.D. | I.D. | Connections | ||
inch | mm | inch | mm | |
4-1/8 | 104.78 | 2 2-1/4 | 50.80 57.15 | NC31,NC35 NC35 |
4-3/4 | 120.65 | 2 2-1/4 | 50.80 57.15 | NC35, NC35,NC38(3 1/2IF) |
6-1/4 | 158.75 | 2-1/4 2-13/16 | 57.15 71.44 | NC46(4IF) 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 3 | 71.44 76.20 | 6 5/8REG 6 5/8REG |
9 | 228.6 | 2-13/16 3 | 71.44 76.20 | 7 5/8REG 7 5/8REG |
9-1/2 | 241.3 | 3 | 76.20 | 7 5/8REG |
10 | 254 | 3 | 76.20 | NC70 |
11 | 275.4 | 3 | 76.20 | NC77 |
non-magnetic drill collar spiral drill collar non-magnetic spiral drill collar