Spiral Drill Collar With Elevator Groove And Slip Groove
Elevator groove and slip groove made on box thread face of slick drill collar or spiral drill collar can be used as lifting sub and safety slip when trip out. The technical parameters for elevator groove and slip groove is as per API SPEC7-1. Hardbanding is optional at customers' requests.
| Drill collar Model | O.D | I.D | Length | Shoulder chamfer diameter | Reference bend | ||||
| mm | in | mm | in | mm | in | mm | in | Bending strength ratio | |
| NC26-35 | 88.9 | 2003/1/2 | 38.1 | 2001/1/2 | 9150 | 30 | 82.9 | 3-17/64 | 2.42:1 |
| NC31-41 | 104.8 | 2004/1/8 | 50.8 | 2 | 9150 | 30/31 | 100.4 | 3-61/64 | 2.43:1 |
| N038-50 | 127 | 5 | 57.2 | 2002/1/4 | 9150 | 30/31 | 121 | 4-49/64 | 2.38:1 |
| NC46-62 | 158.8 | 2006/1/4 | 71.4 | 2-13/16 | 9150/9450 | 30/31 | 150 | 5-29/32 | 2.63:1 |
| NC46-65 | 165.1 | 2006/1/2 | 57.2 | 2002/1/4 | 9150/9450 | 30/31 | 154.8 | 6-3/32 | 2.76:1 |
| NC46-65 | 165.1 | 2006/1/2 | 71.4 | 2-13/16 | 9150/9450 | 30/31 | 154.8 | 6-3/32 | 3.05:1 |
| NC46-67 | 171.4 | 2006/3/4 | 57.2 | 2002/1/4 | 9150/9450 | 30/31 | 159.5 | 6-9/32 | 3.18:1 |
| NC50-70 | 177.8 | 7 | 57.2 | 2002/1/4 | 9150/9450 | 30/31 | 164.7 | 6-31/64 | 2.54:1 |
| NC50-70 | 177.8 | 7 | 71.4 | 2-13/16 | 9150/9450 | 30/31 | 164.7 | 6-31/64 | 2.73:1 |
| NC56-80 | 203.2 | 8 | 71.4 | 2-13/16 | 9150/9450 | 30/31 | 190.1 | 7-31/64 | 3.02:1 |
| 6-5/8REG | 209.6 | 2008/1/4 | 71.4 | 2-13/46 | 9150/9450 | 30/31 | 195.7 | 7-45/64 | 2.93:1 |
| 7-5/8REG | 241.3 | 2009/1/2 | 76.2 | 3 | 9150/9450 | 30/31 | 223.8 | 8-13/16 | 2.81;1 |
| 8-5/8REG | 279.4 | 11 | 76.2 | 3 | 9150/9450 | 30/31 | 266.7 | 2010/1/2 | 2.84:1 |
| Drill collar thread type: NCXX- digital type; REG-normal type. | |||||||||
The Company possesses a complete set of petroleum drilling tool production lines and mainly produces large deep-hole boring machines, ordinary lathes, CNC lathes, mill, printer, etc. The Company has established a dedicated testing center that is equipped with domestic and overseas advanced precision testing equipment and sound testing means to control the whole process of products and strictly abides by API 7-1, API 7-2, SY/T5144 and SY/T5146 standards to ensure that all performance indexes of the Company's products can meet international standards and standards of American Petroleum Institute (API). The Company has passed IS09001 quality management system certification and HSE management system certification and has obtained the right to use the logos of API petroleum drilling tools. Main drilling tools include non-magnetic drill collar, non-magnetic pressure drill pipe, ordinary drill collar, integrated heavy weight drill pipe, adapter, etc. The annual production capacity is 10,000 pieces. The Company can also machine products according to special requirements of users.
