drill collar with slip groove:
1.Meeting to API7-1
2.OD:4 1/8"-11"
3.Length:5"-31"
Port: main ports
Minimum Order Quantity: 1 Piece/Pieces
Supply Ability: 300 Ton/Tons per Month
Payment Terms: L/C,T/T
Contact Supplier
Packaging Detail: bundling
Delivery Detail: according to the request
drill collar with slip groove
1.Meeting to API7-1
2.OD:4 1/8",4 3/4",6 1/4",6 1/2",7",8",9",10",11"
3.Connection:NC31,NC35,NC38(3 1/2IF),NC44,NC46(4IF),NC50(4 1/2IF),NC56,NC61,NC70,7 5/8REG,8 5/8REG.
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
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