API Spec Non magnetic Drill Collar--Oil and gas equipment Quality Choice
USD $30 - $100 /Meter
Min.Order:100 Meters
Shijiazhuang Longxuan Trading Co., Ltd.
API Spec Non magnetic Drill Collar
Drill Collar is mainly used for providing drill bit with required drilling pressure, ensuring pull force transmitted to drill pipe and centralize the drill bit. According to API Spec7-1 Specifications, the material quality is 4145H that’s after heat treatment, thread hardening treatment and phosphating to better antiseize. It also can be produced upon customers’ requirements.
Drilling Collar
According to API Spec7-1 Specifications
| |||||
Drilling collar model |
mm External Diameter |
mm Internal Diameter |
m Length |
mm Chamfering Diameter |
Reference Flexural Strength Rate |
NC23-31 | 79.4 | 31.8 | 9140 | 76.2 | 2.57:1 |
NC26-35 | 88.9 | 38.1 | 9140 | 82.9 | 2.42:1 |
NC31-41 | 104.8 | 50.8 | 9140or9450 | 100.4 | 2.43:1 |
NC35-47 | 120.6 | 50.8 | 9140 or 9450 | 114.7 | 2.58:1 |
NC38-50 | 127.0 | 57.2 | 9140 or 9450 | 121.0 | 2.38:1 |
NC44-60 | 152.4 | 57.2 | 9140 or 9450 | 144.5 | 2.49:1 |
NC44-60 | 152.4 | 71.4 | 9140 or 9450 | 144.5 | 2.84:1 |
NC44-62 | 158.8 | 57.2 | 9140 or 9450 | 149.2 | 2.91:1 |
NC46-62 | 158.8 | 71.4 | 9140 or 9450 | 150.0 | 2.63:1 |
NC46-65 | 165.1 | 57.2 | 9140 or 9450 | 154.8 | 2.76:1 |
NC46-65 | 165.1 | 71.4 | 9140 or 9450 | 154.8 | 3.05:1 |
NC46-67 | 171.5 | 57.2 | 9140 or 9450 | 159.5 | 3.18:1 |
NC50-70 | 177.8 | 57.2 | 9140 or 9450 | 164.7 | 2.54:1 |
NC50-70 | 177.8 | 71.4 | 9140 or 9450 | 164.7 | 2.73:1 |
NC50-72 | 184.2 | 71.4 | 9140 or 9450 | 169.5 | 3.12:1 |
NC56-77 | 196.8 | 71.4 | 9140 or 9450 | 185.3 | 2.70:1 |
NC56-80 | 203.2 | 71.4 | 9140 or 9450 | 190.1 | 3.02:1 |
65/8REG | 209.6 | 71.4 | 9140 or 9450 | 195.6 | 2.93:1 |
NC61-90 | 228.6 | 71.4 | 9140 or 9450 | 212.7 | 3.17:1 |
75/8REG | 241.3 | 76.2 | 9140 or 9450 | 223.8 | 2.81:1 |
NC70-97 | 247.6 | 76.2 | 9140 or 9450 | 232.6 | 2.57:1 |
NC70-100 | 254.0 | 76.2 | 9140 or 9450 | 237.3 | 2.81:1 |
85/8REG | 279.4 | 76.2 | 9140 or 9450 | 266.7 | 2.84:1 |
Established in 1975,Our factory is subordinated to Hebei Geology and Mineral Industries Department. As the designated production enterprise, Our factory specialized in manufacturing drilling equipment and auxiliary tools. It is a member of China Mining Association, vice chairman of the Geological and Mining Equipment Branch, a member of China Geological and Equipment General Corporation, a member unit of National Water Well Drilling Rig Information Network and a designated production enterprise of the General Reserve Department of PLA. Hebei Shitan Machinery Manufacturing Co., Ltd is located in No. 788, Zhongshan Road, Shijiazhuang city and adjacent to Qingyin Highway, enjoys favorable geographical location and transportation facilities.
Our factory has well-equipped production equipment, strong technical strength, perfect detection methods, reliable product quality and advanced management concept. It has the domestic most advanced equipment, including the Numerical Controlled (NC) friction welding machine, drill pipe hammer forging and all-in-one tempering equipment. Besides, it is equipped with non-destructive testing (NDT), physical experiment, chemical composition analysis and metallurgical analysis apparatus. Our factory
get the ISO9001 in 2009 and API certification in 2002 one after another, which becomes one of the API authorized enterprises in geological departments.